During the 3CX Supply Chain Attack, AppleJeus payloads use AES-256 GCM cipher to encrypt data to include ICONICSTEALER and VEILEDSIGNAL.56
group
AppleJeus G1049
- Created
- 25 August 2025
- Last modified
- 31 July 2026
- Aliases
- AppleJeus · Gleaming Pisces · Citrine Sleet · UNC1720 · UNC4736
AppleJeus is a North Korean state-sponsored threat group attributed to the Reconnaissance General Bureau. Associated with the broader Lazarus Group umbrella of actors, AppleJeus has been active since at least 2018 and is closely aligned in resources with TEMP.hermit, another DPRK-affiliated group under the same umbrella.[1] The group’s primary mission is to generate and launder revenue to provide financial support to the government. AppleJeus primarily targets the cryptocurrency industry and is most notably responsible for the 3CX Supply Chain Attack.[2] The group traditionally deploys malicious cryptocurrency software in combination with Phishing. From these compromised environments, it selectively deploys additional backdoors to enable extended operations against high-value financial targets.[3][4]
2
TechniquesBottom 8%
2
TacticsBottom 10%
0
Tools & malwareNone recorded
1
Campaignunranked
Enterprise ATT&CK only. Any Mobile or ICS rows on the same ATT&CK page are not carried.
MITRE reference G1049
During the 3CX Supply Chain Attack, AppleJeus uses embedded .dll as apart of a chained delivery mechanism to invoke the COM class factory.7
During the 3CX Supply Chain Attack, AppleJeus encrypts its dynamic library files (.dll) using RC4, and when loaded only decrypts specific portions of the file using the key 3jB(2bsG#@c7.8
During the 3CX Supply Chain Attack, AppleJeus's VEILEDSIGNAL uses process injection to inject the C2 communication module code in the first found process instance of Chrome, Firefox, or Edge web browsers. It also monitors the established named pipe and re-injects the C2 communication module if necessary.9
During the 3CX Supply Chain Attack, AppleJeus uses the SigFlip tool to inject arbitrary code without affecting or breaking the file's signature.1011
During the 3CX Supply Chain Attack, AppleJeus's COLDCAT C2 leverages cookie headers to contain data over HTTPS. Cookies also contain hardcoded variables __tutma or __tutmc in the payload's HTTPS request.1213
Standing G1049
Reach is how much of ATT&CK this group 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 176 ATT&CK groups 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
Techniques2Bottom 8%
8th percentile · 92% of 176 ATT&CK groups have more Enterprise techniques.
Tactics2Bottom 10%
10th percentile · 90% of 176 ATT&CK groups have more tactics spanned.
Tools & malware0Bottom 9%
9th percentile · 91% of 176 ATT&CK groups have more tools and malware.
Campaign189% tie · 4 values
89% of the population shares a single value across only 4 distinct values, so a percentile here would rank the tie, not the entity.
Coverage
Rules / technique15.5med44th pct
44th percentile · 56% of 176 ATT&CK groups have more detection rules per technique.
Tests / technique0med
Detection coverage G1049
31 distinct rules cover the 2 techniques recorded for this group. 17 Splunk · 14 Sigma.
1 covered by at least one rule1 with no coverage31 distinct rules in total
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