HAMMERTOSS is controlled via commands that are appended to image files.3
tool
HAMMERTOSS S0037
- Type
- malware
- Platform
- Windows
- Created
- 31 May 2017
- Last modified
- 17 November 2024
HAMMERTOSS is a backdoor that was used by APT29 in 2015. [1] [2]
7
Techniques33rd pct
4
Tactics32nd pct
1
Threat groupunranked
0
CampaignsNone recorded
Enterprise ATT&CK only. Any Mobile or ICS rows on the same ATT&CK page are not carried.
MITRE reference S0037
HAMMERTOSS is known to use PowerShell.4
The "Uploader" variant of HAMMERTOSS visits a hard-coded server over HTTP/S to download the images HAMMERTOSS uses to receive commands.5
The "tDiscoverer" variant of HAMMERTOSS establishes a C2 channel by downloading resources from Web services like Twitter and GitHub. HAMMERTOSS binaries contain an algorithm that generates a different Twitter handle for the malware to check for instructions every day.6
HAMMERTOSS has used -WindowStyle hidden to conceal PowerShell windows.7
HAMMERTOSS exfiltrates data by uploading it to accounts created by the actors on Web cloud storage providers for the adversaries to retrieve later.8
Standing S0037
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
Techniques733rd pct
33rd percentile · 67% of 825 ATT&CK software entries have more Enterprise techniques.
Tactics432nd pct
32nd percentile · 68% of 825 ATT&CK software entries have more tactics spanned.
Threat group161% 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 / technique11medBottom 18%
18th percentile · 82% of 825 ATT&CK software entries have more detection rules per technique.
Tests / technique3med
Detection coverage S0037
380 distinct rules cover the 7 techniques recorded for this tool. The 388 technique-to-rule mappings resolve to 380 distinct rules, because one rule can cover several techniques. 290 Sigma · 90 Splunk.
5 covered by at least one rule2 with no coverage380 distinct rules in total
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