CHIMNEYSWEEP can collect files from compromised hosts.2
tool
CHIMNEYSWEEP S1149
- Type
- malware
- Platform
- Windows
- Created
- 7 August 2024
- Last modified
- 9 August 2024
CHIMNEYSWEEP is a backdoor malware that was deployed during HomeLand Justice along with ROADSWEEP ransomware, and has been used to target Farsi and Arabic speakers since at least 2012.[1]
31
TechniquesTop 7%
11
TacticsTop 2%
0
Threat groupsNone recorded
1
Campaignunranked
Enterprise ATT&CK only. Any Mobile or ICS rows on the same ATT&CK page are not carried.
MITRE reference S1149
CHIMNEYSWEEP can use a custom Base64 alphabet to encode an API decryption key.3
The CHIMNEYSWEEP installer has been padded with null bytes to inflate its size.4
CHIMNEYSWEEP can use LoadLibrary and GetProcAddress to resolve Windows API function strings at run time.5
CHIMNEYSWEEP can extract RC4 encrypted embedded payloads for privilege escalation.6
CHIMNEYSWEEP has included the victim's computer name and username in C2 messages sent to actor-owned infrastructure.7
Standing S1149
Reach is how much of ATT&CK this tool 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
Techniques31Top 7%
93rd percentile · 93% of 825 ATT&CK software entries have this many Enterprise techniques or fewer.
Tactics11Top 2%
98th percentile · 98% of 825 ATT&CK software entries have this many tactics spanned or fewer.
Threat groups061% 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.
Campaign185% 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 / technique15med34th pct
34th percentile · 66% of 825 ATT&CK software entries have more detection rules per technique.
Tests / technique5med
Detection coverage S1149
1076 distinct rules cover the 31 techniques recorded for this tool. The 1228 technique-to-rule mappings resolve to 1076 distinct rules, because one rule can cover several techniques. 762 Sigma · 314 Splunk.
29 covered by at least one rule2 with no coverage1076 distinct rules in total
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