YARA · SEKOIA.IO Community
SEKOIA_Backdoor_Win_Mgbot_Main
Detect MgBot main.dll file
- Author
- Sekoia.io
- Date
- 2024-03-20
- Modified
- 2024-12-19
- Score / Quality
- 75 / 80
What this rule detects
Detect MgBot main.dll file
Associated malware family: Mgbot.
Targets: Windows PE.
It has no patterns: the condition alone decides (modules, file properties or other rules). YARA modules used: pe, hash.
YARA-X says: warning[deprecated_field]: field `number_of_sections` is deprecated
Summary generated from the rule's metadata and condition.
Rule source
Includes the imports needed to compile it on its own.
import "pe"
import "hash"
rule SEKOIA_Backdoor_Win_Mgbot_Main
{
meta:
= "Detect MgBot main.dll file"
= "Sekoia.io"
= "528baa11-58d5-470a-bd6d-963d4ac75d97"
= "2024-03-20"
= "2024-12-19"
= "https://symantec-enterprise-blogs.security.com/blogs/threat-intelligence/apt-attacks-telecoms-africa-mgbot"
= "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/backdoor_win_mgbot_main.yar#L4-L35"
= "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
= "706c9030c2fa5eb758fa2113df3a7e79257808b3e79e46869d1bf279ed488c36"
= "017187a1b6d58c69d90d81055db031f1a7569a3b95743679b21e44ea82cfb6c7"
= "61b335c88ce8bc56396b597c7c6f27b1d431941682401f0b3950c80edf7d8403"
= 75
= 80
= ""
= "1.0"
= "TLP:CLEAR"
condition:
pe.imphash( ) == "8e1ee04a99c77bd54c6dc55214ffa2e3" or hash.md5 ( pe.rich_signature.clear_data ) == "67e8e8b75b981b5c8ff31149dc2c61b2" or for any i in ( 0 .. pe.number_of_sections -1 ) : ( hash.md5 ( pe.sections [ i ] . raw_data_offset , pe.sections [ i ] . raw_data_size ) == "7c6adf9987e6dfbf19b5f156b0314798" or hash.md5 ( pe.sections [ i ] . raw_data_offset , pe.sections [ i ] . raw_data_size ) == "46fa9f5a035c8ae8de1a0d14150bd5ef" or hash.md5 ( pe.sections [ i ] . raw_data_offset , pe.sections [ i ] . raw_data_size ) == "f7895f9456f8d51125e6744960c38133" or hash.md5 ( pe.sections [ i ] . raw_data_offset , pe.sections [ i ] . raw_data_size ) == "5d82bb8a7ef37c417615381b446f715c" ) or for any i in ( 0 .. pe.number_of_resources -1 ) : ( hash.sha256 ( pe.resources [ i ] . offset , pe.resources [ i ] . length ) == "d7808c6662f098e685040f7c61bc033d9e73002f674de7cf2ffcd6230d60d429" )
}
Condition
pe.imphash( ) == "8e1ee04a99c77bd54c6dc55214ffa2e3" or hash.md5 ( pe.rich_signature.clear_data ) == "67e8e8b75b981b5c8ff31149dc2c61b2" or for any i in ( 0 .. pe.number_of_sections -1 ) : ( hash.md5 ( pe.sections [ i ] . raw_data_offset , pe.sections [ i ] . raw_data_size ) == "7c6adf9987e6dfbf19b5f156b0314798" or hash.md5 ( pe.sections [ i ] . raw_data_offset , pe.sections [ i ] . raw_data_size ) == "46fa9f5a035c8ae8de1a0d14150bd5ef" or hash.md5 ( pe.sections [ i ] . raw_data_offset , pe.sections [ i ] . raw_data_size ) == "f7895f9456f8d51125e6744960c38133" or hash.md5 ( pe.sections [ i ] . raw_data_offset , pe.sections [ i ] . raw_data_size ) == "5d82bb8a7ef37c417615381b446f715c" ) or for any i in ( 0 .. pe.number_of_resources -1 ) : ( hash.sha256 ( pe.resources [ i ] . offset , pe.resources [ i ] . length ) == "d7808c6662f098e685040f7c61bc033d9e73002f674de7cf2ffcd6230d60d429" )In plain words (Heuristic)
- A for-loop checks a property over several matches or items.
- Uses the pe module.
- Uses the hash module.
- Compares a hash of the file or a part of it.
- Checks the PE import hash (imphash).
- Checks PE sections (names, count or properties).
Test this rule in your browser
Drop a file to scan it with this rule using YARA-X compiled to WebAssembly. Nothing is uploaded.
Sample hashes
Hashes of samples the author lists in the rule's meta (look them up in your threat-intelligence platform).
- 706c9030c2fa5eb758fa2113df3a7e79257808b3e79e46869d1bf279ed488c36
- 017187a1b6d58c69d90d81055db031f1a7569a3b95743679b21e44ea82cfb6c7
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: 528baa11-58d5-470a-bd6d-963d4ac75d97
Metadata
| version | 1.0 |
|---|---|
| classification | TLP:CLEAR |
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