YARA · Malpedia signator rules
MALPEDIA_Win_Romeos_Auto
autogenerated rule brought to you by yara-signator
- 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: Romeos.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-romeos-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Romeos_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "12495197-7596-5c2e-ab04-63a6332561ed"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.romeos"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.romeos_auto.yar#L1-L121"
= "N/A"
= "bf09e333d14ab00f5e904284a96a914721f903efe98848731f5de75ba7f94542"
= 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 = { b9ff070000 33c0 8d7c2449 c644244800 6a16 }
$sequence_1 = { 85f6 750a 5e 33c0 5b 83c408 c20c00 }
$sequence_2 = { 85ed 7e0e e8???????? 88441c18 }
$sequence_3 = { 83c408 807c24480e 7406 43 83fb08 7cb6 e8???????? }
$sequence_4 = { 7406 43 83fb08 7cb6 e8???????? }
$sequence_5 = { 43 3bdd 7cf2 8b542414 6a16 8d44244c 52 }
$sequence_6 = { f3ab 66ab aa 8d44244c c644241701 50 }
$sequence_7 = { 85c0 754c 6a16 8d54241c 55 52 57 }
$sequence_8 = { 754c 6a16 8d54241c 55 }
$sequence_9 = { 5b 81c438200000 c20400 5f 5e }
condition:
7 of them and filesize < 294912
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { b9ff070000 33c0 8d7c2449 c644244800 6a16 } | |
| $sequence_1 | hex | { 85f6 750a 5e 33c0 5b 83c408 c20c00 } | |
| $sequence_2 | hex | { 85ed 7e0e e8???????? 88441c18 } | |
| $sequence_3 | hex | { 83c408 807c24480e 7406 43 83fb08 7cb6 e8???????? } | |
| $sequence_4 | hex | { 7406 43 83fb08 7cb6 e8???????? } | |
| $sequence_5 | hex | { 43 3bdd 7cf2 8b542414 6a16 8d44244c 52 } | |
| $sequence_6 | hex | { f3ab 66ab aa 8d44244c c644241701 50 } | |
| $sequence_7 | hex | { 85c0 754c 6a16 8d54241c 55 52 57 } | |
| $sequence_8 | hex | { 754c 6a16 8d54241c 55 } | |
| $sequence_9 | hex | { 5b 81c438200000 c20400 5f 5e } |
Condition
7 of them and filesize < 294912In plain words (Heuristic)
- The file must be smaller than 294912 (a cheap guard that skips large files).
- At least 7 patterns in the rule must match.
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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: 12495197-7596-5c2e-ab04-63a6332561ed
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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