defection.io

malware

FlawedAmmyy S0381

Type: malware
Platform: Windows
Created: 28 May 2019
Last modified: 16 April 2025

FlawedAmmyy is a remote access tool (RAT) that was first seen in early 2016. The code for FlawedAmmyy was based on leaked source code for a version of Ammyy Admin, a remote access software.[1]

TechniquesTop 16%

TacticsTop 11%

Threat groupsunranked

CampaignsNone recorded

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

defection.io

malware

FlawedAmmyy S0381

Type: malware
Platform: Windows
Created: 28 May 2019
Last modified: 16 April 2025

FlawedAmmyy is a remote access tool (RAT) that was first seen in early 2016. The code for FlawedAmmyy was based on leaked source code for a version of Ammyy Admin, a remote access software.[1]

TechniquesTop 16%

TacticsTop 11%

Threat groupsunranked

CampaignsNone recorded

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

FlawedAmmyy MITRE reference S0381

Data Obfuscation T1001 ↗

FlawedAmmyy may obfuscate portions of the initial C2 handshake.2

Command and Control2 detection rules

Data from Local System T1005 ↗

FlawedAmmyy has collected information and files from a compromised machine.3

Collection22 detection rules

System Owner/User Discovery T1033 ↗

FlawedAmmyy enumerates the current user during the initial infection.4 5

Discovery47 detection rules

Exfiltration Over C2 Channel T1041 ↗

FlawedAmmyy has sent data collected from a compromised host to its C2 servers.6

Exfiltration16 detection rules

Windows Management Instrumentation T1047 ↗

FlawedAmmyy leverages WMI to enumerate anti-virus on the victim.7

Execution71 detection rules

Input Capture T1056 ↗

FlawedAmmyy can collect mouse events.8

Credential Access · Collection2 detection rules

Standing S0381

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.

Reach

Techniques22Top 16%

84th percentile · 84% of 825 ATT&CK software entries have this many Enterprise techniques or fewer.

Tactics9Top 11%

89th percentile · 89% of 825 ATT&CK software entries have this many tactics spanned or fewer.

Threat groups261% tie · 22 values

61% of the population shares a single value across only 22 distinct values, so a percentile here would rank the tie, not the entity.

Campaigns085% tie · 8 values

85% of the population shares a single value across only 8 distinct values, so a percentile here would rank the tie, not the entity.

Coverage

Rules / technique26med64th pct

64th percentile · 64% of 825 ATT&CK software entries have this many detection rules per technique or fewer.

Tests / technique8med72nd pct

72nd percentile · 72% of 825 ATT&CK software entries have this many atomic tests per technique or fewer.

Data comps / technique4med54% tie · 11 values

54% of the population shares a single value across only 11 distinct values, so a percentile here would rank the tie, not the entity.

Mitigations / technique0.5medBottom 23%

23rd percentile · 77% of 825 ATT&CK software entries have more mitigations per technique.

5 of 8 axes carry an honest rank on this page. Coverage medians are taken across this malware’s 22 Enterprise techniques.

Range

Technique Campaign use over its cumulative rule count.

Campaigns · 0Sigma rules (cumulative) · 651Splunk ESCU (cumulative) · 266