YARA · SEKOIA.IO Community
SEKOIA_Backdoor_Win_Foresttiger
Detect Lazarus' malware ForestTiger
- Author
- Sekoia.io
- Date
- 2023-10-24
- Modified
- 2024-12-19
- Score / Quality
- 75 / 80
What this rule detects
Detect Lazarus' malware ForestTiger
Associated malware family: Forest Tiger.
Targets: Windows PE.
It defines 4 patterns (4 text, 0 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
backdoor-win-foresttiger.yarDetection Rule License 1.1
rule SEKOIA_Backdoor_Win_Foresttiger : FILE
{
meta:
= "Detect Lazarus' malware ForestTiger"
= "Sekoia.io"
= "d3128da2-a86d-4db8-9b75-2f3048831c7e"
= "2023-10-24"
= "2024-12-19"
= "https://www.microsoft.com/en-us/security/blog/2023/10/18/multiple-north-korean-threat-actors-exploiting-the-teamcity-cve-2023-42793-vulnerability/"
= "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/backdoor_win_foresttiger.yar#L1-L21"
= "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
= "e06f29dccfe90ae80812c2357171b5c48fba189ae103d28e972067b107e58795"
= "0be1908566efb9d23a98797884f2827de040e4cedb642b60ed66e208715ed4aa"
= "401adaad1597c017c976c5b0b8f67851469c95758779b7691ebb037d0dda9f38"
= 75
= 80
= "FILE"
= "1.0"
= "TLP:CLEAR"
strings:
$ = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.36 Edg/107.0.1418.42"
$ = "biwbih="
$ = "rlzbiw="
$ = "whoami EnDePriv Erro" wide
condition:
uint16be( 0 ) == 0x4d5a and all of them
}
Strings (4 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $ | text | "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.36 Edg/107.0.1418.42" | |
| $ | text | "biwbih=" | |
| $ | text | "rlzbiw=" | |
| $ | text | "whoami EnDePriv Erro" | wide |
Condition
uint16be( 0 ) == 0x4d5a and all of themIn plain words (Heuristic)
- The file must start with “MZ” — a Windows executable (PE).
- All patterns in the rule must match.
Test this rule in your browser
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Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.
Sample hashes
Hashes of samples the author lists in the rule's meta (look them up in your threat-intelligence platform).
- e06f29dccfe90ae80812c2357171b5c48fba189ae103d28e972067b107e58795
- 0be1908566efb9d23a98797884f2827de040e4cedb642b60ed66e208715ed4aa
Licence & attribution
Author: Sekoia.io
Source repository: SEKOIA.IO Community @ a438a5901a
Licence: Detection Rule License 1.1 (repository licence)
Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.
Rule id: d3128da2-a86d-4db8-9b75-2f3048831c7e
Metadata
| version | 1.0 |
|---|---|
| classification | TLP:CLEAR |
Tags:FILE
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