YARA · Malpedia signator rules
MALPEDIA_Win_Rombertik_Auto
autogenerated rule brought to you by yara-signator
MalwareRombertikMalpedia 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: Rombertik.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-rombertik-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Rombertik_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "7aa70c23-232c-5b21-a7bd-0ec818b6fe5f"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.rombertik"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.rombertik_auto.yar#L1-L120"
= "N/A"
= "fc5e4e935c91415f8beac32f0f98ebdd7353fdfe2ac51f6fae8364c710d9db56"
= 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 = { 75f9 2bc6 03c1 03c7 8d4c187e }
$sequence_1 = { 8945f8 ff15???????? b8???????? 40 3818 75fb 8b35???????? }
$sequence_2 = { 6a00 50 ff15???????? 898608010000 }
$sequence_3 = { 52 6800010000 50 ff15???????? f7d8 1bc0 f7d8 }
$sequence_4 = { 6a00 6a00 6a00 6818000900 50 ff15???????? }
$sequence_5 = { 68ffff1f00 ff15???????? 8bf0 3bf3 7473 }
$sequence_6 = { 8d95e0feffff 52 ffd7 85c0 }
$sequence_7 = { 83c410 85c0 7409 6a00 ffd0 83c404 5e }
$sequence_8 = { 60 8b75fc bf???????? 8b4df8 f3a4 }
$sequence_9 = { 50 52 8d85f4feffff 57 50 e8???????? }
condition:
7 of them and filesize < 73728
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 75f9 2bc6 03c1 03c7 8d4c187e } | |
| $sequence_1 | hex | { 8945f8 ff15???????? b8???????? 40 3818 75fb 8b35???????? } | |
| $sequence_2 | hex | { 6a00 50 ff15???????? 898608010000 } | |
| $sequence_3 | hex | { 52 6800010000 50 ff15???????? f7d8 1bc0 f7d8 } | |
| $sequence_4 | hex | { 6a00 6a00 6a00 6818000900 50 ff15???????? } | |
| $sequence_5 | hex | { 68ffff1f00 ff15???????? 8bf0 3bf3 7473 } | |
| $sequence_6 | hex | { 8d95e0feffff 52 ffd7 85c0 } | |
| $sequence_7 | hex | { 83c410 85c0 7409 6a00 ffd0 83c404 5e } | |
| $sequence_8 | hex | { 60 8b75fc bf???????? 8b4df8 f3a4 } | |
| $sequence_9 | hex | { 50 52 8d85f4feffff 57 50 e8???????? } |
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.
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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: 7aa70c23-232c-5b21-a7bd-0ec818b6fe5f
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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