YARA · Malpedia signator rules
MALPEDIA_Win_Atmitch_Auto
autogenerated rule brought to you by yara-signator
MalwareAtmitchMalpedia signator rulesCreative Commons Attribution-ShareAlike 4.0Compiles with YARA-X
- Author
- Felix Bilstein - yara-signator at cocacoding dot com
- Date
- 2026-05-04
- Modified
- 2026-05-18
- Score / Quality
- 75 / 75
What this rule detects
autogenerated rule brought to you by yara-signator
Associated malware family: Atmitch.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-atmitch-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Atmitch_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "d46e4955-9c99-5429-9db9-d72f11678fb3"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.atmitch"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.atmitch_auto.yar#L1-L127"
= "N/A"
= "47e8cf221fe7216b11c686530de58bb5caeb8ac20fac4ae14e17077791312d91"
= 75
= 75
= "FILE"
= "1"
= "yara-signator v0.6.0"
= "callsandjumps;datarefs;binvalue"
= "20260422"
= "a182e35da64e6d71cb55f125c4d4225196523f14"
= "20260504"
= "CC BY-SA 4.0"
= "TLP:WHITE"
strings:
$sequence_0 = { 7407 8b542418 895004 837c242400 740c 8b442420 50 }
$sequence_1 = { 8b4204 50 51 8bcc 8964241c 68???????? ff15???????? }
$sequence_2 = { ff15???????? c744242000000000 833d????????02 7f05 e8???????? a1???????? }
$sequence_3 = { 8b4818 83c408 51 51 8bcc 8964241c }
$sequence_4 = { eb1b 50 51 8bcc 8964241c 68???????? ff15???????? }
$sequence_5 = { ff15???????? 50 ff15???????? 6aff b9???????? 8bf0 ff15???????? }
$sequence_6 = { ff15???????? 8d4c2420 c644244803 ff15???????? }
$sequence_7 = { 8bf8 83c404 33c9 33d2 33c0 6a11 }
$sequence_8 = { 83ec2c a1???????? 33c4 89442428 0fb705???????? 53 }
$sequence_9 = { 8b0e 0fb7412c 83c408 83f809 774d ff2485f4200010 b8???????? }
condition:
7 of them and filesize < 73728
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 7407 8b542418 895004 837c242400 740c 8b442420 50 } | |
| $sequence_1 | hex | { 8b4204 50 51 8bcc 8964241c 68???????? ff15???????? } | |
| $sequence_2 | hex | { ff15???????? c744242000000000 833d????????02 7f05 e8???????? a1???????? } | |
| $sequence_3 | hex | { 8b4818 83c408 51 51 8bcc 8964241c } | |
| $sequence_4 | hex | { eb1b 50 51 8bcc 8964241c 68???????? ff15???????? } | |
| $sequence_5 | hex | { ff15???????? 50 ff15???????? 6aff b9???????? 8bf0 ff15???????? } | |
| $sequence_6 | hex | { ff15???????? 8d4c2420 c644244803 ff15???????? } | |
| $sequence_7 | hex | { 8bf8 83c404 33c9 33d2 33c0 6a11 } | |
| $sequence_8 | hex | { 83ec2c a1???????? 33c4 89442428 0fb705???????? 53 } | |
| $sequence_9 | hex | { 8b0e 0fb7412c 83c408 83f809 774d ff2485f4200010 b8???????? } |
Condition
7 of them and filesize < 73728In plain words (Heuristic)
- The file must be smaller than 73728 (a cheap guard that skips large files).
- At least 7 patterns in the rule must match.
Test this rule in your browser
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Licence & attribution
Author: Felix Bilstein - yara-signator at cocacoding dot com
Source repository: Malpedia signator rules @ c901f97b7d
Licence: Creative Commons Attribution-ShareAlike 4.0 (repository licence)
Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.
Rule id: d46e4955-9c99-5429-9db9-d72f11678fb3
Metadata
| version | 1 |
|---|---|
| tool | yara-signator v0.6.0 |
| signator_config | callsandjumps;datarefs;binvalue |
| malpedia_rule_date | 20260422 |
| malpedia_hash | a182e35da64e6d71cb55f125c4d4225196523f14 |
| malpedia_version | 20260504 |
| malpedia_license | CC BY-SA 4.0 |
| malpedia_sharing | TLP:WHITE |
Tags:FILE
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