malware

SynAck S0242

Type: malware
Platform: Windows
Created: 17 October 2018
Last modified: 25 April 2025

SynAck is variant of Trojan ransomware targeting mainly English-speaking users since at least fall 2017. [1] [2]

Techniques61st pct

Tactics68th pct

Threat groupsNone recorded

CampaignsNone recorded

Enterprise ATT&CK only. Any Mobile or ICS rows on the same ATT&CK page are not carried.

Standing S0242

Reach is how much of ATT&CK this malware touches. Coverage is how well defended each thing it does is, as a median per technique rather than a total — a total would just restate the reach. Each figure is ranked against all 825 ATT&CK software entries only where that population actually spreads. Where most of the population shares one value, a percentile would rank the tie instead of the entity, so the raw value is shown and no rank is claimed.

Select	Description	Category	Status	Event	OS	Product	MITRE ATT&CK	CVEs	Severity	Author	Created	Updated	ID	Refs
	Detects file access requests to files ending with either the ".hive"/".reg" extension, usually associated with Windows Registry backups.	Hunting	test	file_access	windows	-	Persistence, Defense Impairment Modify Registry	-	low	frack113	2023-09-15	2024-07-29	337a31c6-46c4-46be-886a-260d7aa78cac
	Detect set Notification_Suppress to 1 to disable the Windows security center notification	Generic	test	registry_set	windows	Sysmon · WinEventLog Security	Persistence, Defense Impairment Modify Registry	-	medium	frack113	2022-08-19	2023-08-17	0c93308a-3f1b-40a9-b649-57ea1a1c1d63
	Detect set DisallowRun to 1 to prevent user running specific computer program	Generic	test	registry_set	windows	Sysmon · WinEventLog Security	Persistence, Defense Impairment Modify Registry	-	medium	frack113	2022-08-19	2023-08-17	275641a5-a492-45e2-a817-7c81e9d9d3e9
	Detect enable rdp feature to allow specific user to rdp connect on the targeted machine	Generic	test	registry_set	windows	Sysmon · WinEventLog Security	Persistence, Defense Impairment Modify Registry	-	medium	frack113	2022-08-19	2023-08-17	37b437cf-3fc5-4c8e-9c94-1d7c9aff842b
	Detects a highly relevant Antivirus alert that reports ransomware. (...)	Generic	test	antivirus	-	-	Impact Data Encrypted for Impact	-	critical	Florian Roth (Nextron Systems), Arnim Rupp	2022-05-12	2026-06-15	4c6ca276-d4d0-4a8c-9e4c-d69832f8671f
Splunk	The following analytic detects the creation of AWS KMS keys with an encryption policy accessible to everyone, including external entities. (...)	Generic	stable	cloud_audit	-	AWS CloudTrail · AWS	Impact Data Encrypted for Impact	-	medium	Patrick Bareiss, Splunk	2020-10-27	2026-05-13	16ae9076-d1d5-411c-8fdd-457504b33dac
	Detects automated lateral movement by Turla group	Unsupported	unsupported	process_creation	windows	Sysmon · WinEventLog Security	Execution Command and Scripting Interpreter Discovery File and Directory Discovery Discovery Network Share Discovery Lateral Movement Remote Services SMB/Windows Admin Shares	-	medium	Markus Neis	2017-11-07	2023-02-24	75925535-ca97-4e0a-a850-00b5c00779dc
Splunk	The following analytic detects the creation of AWS KMS keys with an encryption policy accessible to everyone, including external entities. (...)	Generic	stable	cloud_audit	-	AWS CloudTrail · AWS	Impact Data Encrypted for Impact	-	medium	Rod Soto, Patrick Bareiss Splunk	2020-10-27	2026-05-13	c79c164f-4b21-4847-98f9-cf6a9f49179e
Splunk	The following analytic identifies users with KMS keys performing encryption operations on S3 buckets. (...)	Anomaly	stable	cloud_audit	-	AWS CloudTrail · AWS	Impact Data Encrypted for Impact	-	medium	Rod Soto, Patrick Bareiss Splunk	2020-10-27	2026-05-13	884a5f59-eec7-4f4a-948b-dbde18225fdc
	Identifies disabling of default Amazon Elastic Block Store (EBS) encryption in the current region. (...)	Generic	stable	cloud_audit	-	AWS CloudTrail · AWS	Impact Data Encrypted for Impact Impact Data Manipulation	-	medium	Sittikorn S	2021-06-29	2021-08-20	16124c2d-e40b-4fcc-8f2c-5ab7870a2223
	Detects the import or deletion of key material in AWS KMS, which can be used as part of ransomware attacks. (...)	Generic	experimental	cloud_audit	-	AWS CloudTrail · AWS	Impact Data Encrypted for Impact Resource Development Stage Capabilities Install Digital Certificate	-	high	toopricey	2025-10-18	—	1279262f-1464-422f-ac0d-5b545320c526
	This detection uses Windows security events to detect suspicious access attempts to the registry key of Azure AD Health monitoring agent. (...)	Generic	test	-	windows	WinEventLog Security	Discovery Query Registry	-	medium	Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research), MSTIC	2021-08-26	2022-10-09	ff151c33-45fa-475d-af4f-c2f93571f4fe
	This detection uses Windows security events to detect suspicious access attempts to the registry key values and sub-keys of Azure AD Health service agents (e.g AD FS). (...)	Generic	test	-	windows	WinEventLog Security	Discovery Query Registry	-	medium	Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research), MSTIC	2021-08-26	2022-10-09	1d2ab8ac-1a01-423b-9c39-001510eae8e8
	Detects usage of the "FromBase64String" function in the commandline which is used to decode a base64 (...)	Generic	test	process_creation	windows	Sysmon · WinEventLog Security	Execution Command and Scripting Interpreter PowerShell Stealth Deobfuscate/Decode Files or Information Stealth Obfuscated Files or Information	-	high	Florian Roth (Nextron Systems)	2020-01-29	2023-01-26	e32d4572-9826-4738-b651-95fa63747e8a
	Detects user data export activity.	Generic	test	cloud_audit	-	Bitbucket Audit · Bitbucket	Collection Data from Information Repositories Reconnaissance Gather Victim Org Information Identify Roles Discovery System Information Discovery	-	medium	Muhammad Faisal (@faisalusuf)	2024-02-25	—	5259cbf2-0a75-48bf-b57a-c54d6fabaef3
	Detects user permission data export attempt.	Generic	test	cloud_audit	-	Bitbucket Audit · Bitbucket	Collection Data from Information Repositories Reconnaissance Gather Victim Org Information Identify Roles Discovery System Information Discovery	-	medium	Muhammad Faisal (@faisalusuf)	2024-02-25	—	87cc6698-3e07-4ba2-9b43-a85a73e151e2
	Detects specific windows registry modifications made by BlackByte ransomware variants. (...)	Emerging	test	registry_set	windows	Sysmon · WinEventLog Security	Persistence, Defense Impairment Modify Registry	-	high	frack113	2022-01-24	2025-10-21	83314318-052a-4c90-a1ad-660ece38d276
	Attempts to detect system changes made by Blue Mockingbird	Emerging	test	process_creation	windows	Sysmon · WinEventLog Security	Persistence, Defense Impairment Modify Registry Execution Windows Management Instrumentation	-	high	Trent Liffick (@tliffick)	2020-05-14	2022-10-09	c3198a27-23a0-4c2c-af19-e5328d49680e
	Attempts to detect system changes made by Blue Mockingbird	Emerging	test	registry_set	windows	Sysmon · WinEventLog Security	Persistence, Defense Impairment Modify Registry Execution Windows Management Instrumentation	-	high	Trent Liffick (@tliffick)	2020-05-14	2023-08-17	92b0b372-a939-44ed-a11b-5136cf680e27
	Detect access to files and shares with names and extensions used by BlueSky ransomware which could indicate a current or previous encryption attempt.	Emerging	test	file_event	windows	WinEventLog Security	Impact Data Encrypted for Impact	-	high	j4son	2023-05-23	—	eee8311f-a752-44f0-bf2f-6b007db16300
	detects BPFDoor .lock and .pid files access in temporary file storage facility	Generic	test	file_event	linux	Linux Auditd	Execution Command and Scripting Interpreter Execution Native API	-	high	Rafal Piasecki	2022-08-10	2026-03-30	808146b2-9332-4d78-9416-d7e47012d83d
	Detects usage of "getcap" binary. (...)	Generic	test	process_creation	linux	Sysmon	Discovery File and Directory Discovery	-	low	Nasreddine Bencherchali (Nextron Systems)	2022-12-28	2026-01-24	d8d97d51-122d-4cdd-9e2f-01b4b4933530
	Detects the execution of the certutil with the "exportPFX" flag which allows the utility to export certificates.	Generic	test	process_creation	windows	Sysmon · WinEventLog Security	Stealth Obfuscated Files or Information	-	medium	Florian Roth (Nextron Systems), Jonhnathan Ribeiro, oscd.community, Nasreddine Bencherchali (Nextron Systems)	2023-02-15	2024-03-05	3ffd6f51-e6c1-47b7-94b4-c1e61d4117c5
	Detect possible persistence using Fax DLL load when service restart	Generic	test	registry_set	windows	Sysmon · WinEventLog Security	Persistence, Defense Impairment Modify Registry	-	high	frack113	2022-07-17	2022-12-30	9e3357ba-09d4-4fbd-a7c5-ad6386314513
	Detect change of the user account associated with the FAX service to avoid the escalation problem.	Generic	test	registry_set	windows	Sysmon · WinEventLog Security	Persistence, Defense Impairment Modify Registry	-	high	frack113	2022-07-17	2022-12-30	e3fdf743-f05b-4051-990a-b66919be1743
Splunk	The following analytic identifies the execution of the "whoami" command with the "/group" flag, where the results are passed to the "find" command in order to look for a the string "12288". (...)	Generic	stable	process_creation	windows	Sysmon · WinEventLog Security · CrowdStrike	Discovery System Owner/User Discovery	-	medium	Teoderick Contreras, Splunk	2021-09-14	2026-05-13	a9079b18-1633-11ec-859c-acde48001122	-
	Detects patterns found in process executions cause by China Chopper like tiny (ASPX) webshells	Generic	test	process_creation	windows	Sysmon · WinEventLog Security	Discovery Account Discovery Discovery Remote System Discovery Persistence Server Software Component Web Shell Discovery System Owner/User Discovery	CVE-2022-41040 CVE-2022-41082	high	Florian Roth (Nextron Systems), MSTI (query)	2022-10-01	—	fa3c117a-bc0d-416e-a31b-0c0e80653efb
Splunk	This analytic detects potential reconnaissance activities on Cisco ASA devices by identifying execution of multiple information-gathering "show" commands within a short timeframe. (...)	Anomaly	stable	firewall	-	Cisco Secure Firewall · Cisco	Reconnaissance Gather Victim Network Information Domain Properties IP Addresses Discovery System Information Discovery	-	medium	Nasreddine Bencherchali, Splunk	2025-11-21	2026-05-13	6e9d4f7a-3c8b-4a9e-8d2f-7b5c9e1a6f3d
	Find information about network devices that is not stored in config files	Generic	test	authentication	-	Cisco AAA · Cisco	Discovery File and Directory Discovery Discovery Password Policy Discovery Discovery Process Discovery Discovery Remote System Discovery Discovery System Information Discovery Discovery System Network Configuration Discovery Discovery System Network Connections Discovery Discovery System Owner/User Discovery Discovery System Time Discovery	-	low	Austin Clark	2019-08-12	2023-01-04	9705a6a1-6db6-4a16-a987-15b7151e299b
Splunk	This analytic detects Cisco IOS-XE command sequences where show logging, clear logging, and exit occur within a short period. (...)	Anomaly	stable	network_device	-	Cisco IOS · Cisco	Defense Impairment Disable or Modify Tools Clear Windows Event Logs	-	medium	Nasreddine Bencherchali	2026-05-19	2026-05-20	e20a6709-5f2c-4508-83fb-b3af6f705717
Splunk	This analytic detects bursts of Cisco IOS or NX-OS discovery commands associated with Salt Typhoon tradecraft. (...)	Anomaly	stable	network_device	-	Cisco IOS · Cisco	Reconnaissance Gather Victim Network Information Discovery System Information Discovery Discovery System Network Configuration Discovery	-	medium	Nasreddine Bencherchali	2026-05-19	2026-05-20	71ac5328-2364-40cf-8381-92b8dc531399
Splunk	This analytic detects Lumma Stealer activity using Cisco Secure Firewall Intrusion Events. (...)	Generic	stable	firewall	-	Cisco Secure Firewall · Cisco	Initial Access Exploit Public-Facing Application Lateral Movement Exploitation of Remote Services Stealth Obfuscated Files or Information Execution User Execution	-	medium	Nasreddine Bencherchali, Splunk, Talos NTDR	2025-04-16	2026-05-13	96bce783-c22e-4e48-8cf1-3eb2794c5083
Splunk	The following analytic detects repeated malware file downloads initiated by the same internal host (src) within a short time window. (...)	Anomaly	stable	firewall	-	Cisco Secure Firewall · Cisco	Command and Control Ingress Tool Transfer Stealth Obfuscated Files or Information	-	medium	Nasreddine Bencherchali, Splunk	2025-04-09	2026-09-22	aeff2bb5-3483-48d4-9be8-c8976194be1e
Splunk	This analytic identifies Snort intrusion signatures that have been triggered by ten or more distinct internal IP addresses within a one-hour window. (...)	Anomaly	stable	firewall	-	Cisco Secure Firewall · Cisco	Command and Control Ingress Tool Transfer Stealth Obfuscated Files or Information	-	medium	Nasreddine Bencherchali, Splunk	2025-04-16	2026-05-13	a4c76d0a-56b6-44be-814b-939746c4d406
	Detects changes to the ClickOnce trust prompt registry key in order to enable an installation from different locations such as the Internet.	Generic	test	registry_set	windows	Sysmon · WinEventLog Security	Persistence, Defense Impairment Modify Registry	-	medium	@SerkinValery, Nasreddine Bencherchali (Nextron Systems)	2023-06-12	2023-08-17	ac9159cc-c364-4304-8f0a-d63fc1a0aabb
	Detects the use of the redirection character ">" to redirect information on the command line. (...)	Hunting	test	process_creation	windows	Sysmon · WinEventLog Security	Discovery System Information Discovery	-	low	frack113	2022-01-22	2024-03-19	4f4eaa9f-5ad4-410c-a4be-bc6132b0175a
	Detects usage of the Get-ADComputer cmdlet to collect computer information and output it to a file	Generic	test	process_creation	windows	Sysmon · WinEventLog Security	Discovery System Owner/User Discovery	-	medium	Nasreddine Bencherchali (Nextron Systems)	2022-11-10	2022-11-17	435e10e4-992a-4281-96f3-38b11106adde
	Detects usage of the Get-ADComputer cmdlet to collect computer information and output it to a file	Generic	test	ps_script	windows	PowerShell	Discovery System Owner/User Discovery	-	medium	Nasreddine Bencherchali (Nextron Systems)	2022-11-17	—	db885529-903f-4c5d-9864-28fe199e6370
	Detects use of chcp to look up the system locale value as part of host discovery	Generic	test	process_creation	windows	Sysmon · WinEventLog Security	Discovery System Location Discovery System Language Discovery	-	medium	_pete_0, TheDFIRReport	2022-02-21	2024-03-05	7090adee-82e2-4269-bd59-80691e7c6338
	Detects potential container discovery via listing of certain kernel features in the "/proc" virtual (...)	Generic	test	process_creation	linux	Sysmon	Discovery System Information Discovery	-	low	Seth Hanford	2023-08-23	—	746c86fb-ccda-4816-8997-01386263acc4
	Detects usage of the "ConvertTo-SecureString" cmdlet via the commandline. (...)	Generic	test	process_creation	windows	Sysmon · WinEventLog Security	Execution Command and Scripting Interpreter PowerShell Stealth Obfuscated Files or Information	-	medium	Teymur Kheirkhabarov (idea), Vasiliy Burov (rule), oscd.community, Tim Shelton	2020-10-11	2023-02-01	74403157-20f5-415d-89a7-c505779585cf
	Detects disabling the CrashDump per registry (as used by HermeticWiper)	Generic	test	registry_set	windows	Sysmon · WinEventLog Security	Stealth Hide Artifacts Persistence, Defense Impairment Modify Registry	-	medium	Tobias Michalski (Nextron Systems)	2022-02-24	2023-08-17	2ff692c2-4594-41ec-8fcb-46587de769e0
	Detects usage of crontab to list the tasks of the user	Generic	test	process_creation	linux	Sysmon	Discovery System Service Discovery	-	low	Joseliyo Sanchez, @Joseliyo_Jstnk	2023-06-02	—	403ed92c-b7ec-4edd-9947-5b535ee12d46
Splunk	The following analytic detects the execution of the curl utility where the command line includes percent-encoded characters and explicit file output options (such as -o or --output). (...)	Anomaly	stable	process_creation	windows · linux	CrowdStrike · Sysmon · WinEventLog Security	Command and Control Ingress Tool Transfer Stealth Obfuscated Files or Information	-	medium	Nasreddine Bencherchali, Splunk	2026-03-03	2026-05-13	9a8d5516-4c5e-11ef-9d42-acde48001122
	Detects changes to the "Ports" registry key with data that includes a Windows path or a file with a suspicious extension. (...)	Emerging	test	registry_set	windows	Sysmon · WinEventLog Security	Persistence, Defense Impairment Modify Registry	CVE-2020-1048	high	EagleEye Team, Florian Roth (Nextron Systems), NVISO	2020-05-13	2024-03-25	7ec912f2-5175-4868-b811-ec13ad0f8567
	Detects usage of base64 utility to decode arbitrary base64-encoded text	Generic	test	process_creation	linux	Sysmon	Stealth Obfuscated Files or Information	-	low	Daniil Yugoslavskiy, oscd.community	2020-10-19	2021-11-27	e2072cab-8c9a-459b-b63c-40ae79e27031
	Detects usage of base64 utility to decode arbitrary base64-encoded text	Generic	test	process_creation	macos	-	Stealth Obfuscated Files or Information	-	low	Daniil Yugoslavskiy, oscd.community	2020-10-19	2022-11-26	719c22d7-c11a-4f2c-93a6-2cfdd5412f68
Splunk	The following analytic identifies specific GET or HEAD requests to web servers that indicate reconnaissance attempts to find vulnerable JBoss servers. (...)	Generic	experimental	webserver	-	-	Initial Access, Persistence External Remote Services Discovery System Information Discovery	-	medium	Bhavin Patel, Splunk	2020-04-29	2026-05-13	104658f4-afdc-499e-9719-17243f982681	-
	Detects the installation of a Callout DLL via CalloutDlls and CalloutEnabled parameter in Registry, (...)	Generic	test	registry_set	windows	Sysmon · WinEventLog Security	Execution, Stealth Hijack Execution Flow DLL Persistence, Defense Impairment Modify Registry	-	high	Dimitrios Slamaris	2017-05-15	2023-08-17	9d3436ef-9476-4c43-acca-90ce06bdf33a
	Detect the usage of "DirLister.exe" a utility for quickly listing folder or drive contents. (...)	Generic	test	process_creation	windows	Sysmon · WinEventLog Security	Discovery File and Directory Discovery	-	low	frack113	2022-08-20	2023-02-04	b4dc61f5-6cce-468e-a608-b48b469feaa2

Title

Description

SynAck S0242

SynAck MITRE reference S0242

Standing S0242

Reach

Coverage

SynAck detections S0242