StrelaStealer encrypts the payload of HTTP POST communications using the same XOR key used for the malware's DLL payload.5
tool
StrelaStealer S1183
- Type
- malware
- Platform
- Windows
- Created
- 31 December 2024
- Last modified
- 10 March 2025
StrelaStealer is an information stealer malware variant first identified in November 2022 and active through late 2024. StrelaStealer focuses on the automated identification, collection, and exfiltration of email credentials from email clients such as Outlook and Thunderbird.[1][2][3][4]
34
TechniquesTop 5%
9
TacticsTop 11%
0
Threat groupsNone recorded
0
CampaignsNone recorded
Enterprise ATT&CK only. Any Mobile or ICS rows on the same ATT&CK page are not carried.
MITRE reference S1183
StrelaStealer automatically sends gathered email credentials following collection to command and control servers via HTTP POST.67
StrelaStealer has been distributed in ISO archives.8 StrelaStealer has been delivered in encrypted, password-protected ZIP archives.9
StrelaStealer variants have used packers to obfuscate payloads and make analysis more difficult.10
StrelaStealer uses XOR-encoded strings to obfuscate items.11
StrelaStealer has been delivered via JScript files in a ZIP archive.1213
Standing S1183
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
Techniques34Top 5%
95th percentile · 95% 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 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.
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 / technique15med34th pct
34th percentile · 66% of 825 ATT&CK software entries have more detection rules per technique.
Tests / technique3med
Detection coverage S1183
1085 distinct rules cover the 34 techniques recorded for this tool. The 1288 technique-to-rule mappings resolve to 1085 distinct rules, because one rule can cover several techniques. 780 Sigma · 305 Splunk.
31 covered by at least one rule3 with no coverage1085 distinct rules in total
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