YARA · Malpedia signator rules
MALPEDIA_Win_Rambo_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: Rambo.
It defines 16 patterns (0 text, 16 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-rambo-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Rambo_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "609623dc-549f-57b1-8b2d-3525d67579fa"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.rambo"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.rambo_auto.yar#L1-L173"
= "N/A"
= "05f9ac9a9a64960824cdad5ca8e789cf6b2f34ae99d30e1b72925993e7a5fe3f"
= 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 = { 56 6800040000 8d85f8faffff 6a00 50 e8???????? 83c40c }
$sequence_1 = { 8d85f8feffff 50 c645fc72 c645fd62 ff15???????? 8bf0 }
$sequence_2 = { 83c420 85f6 7437 56 }
$sequence_3 = { 59 50 ff7508 ff15???????? 56 ff15???????? }
$sequence_4 = { 6a32 ff15???????? 8d85f8faffff 50 68???????? e8???????? 59 }
$sequence_5 = { 56 ff15???????? 8d85ecfdffff 50 8d85f0feffff 50 ff15???????? }
$sequence_6 = { 8d85fcfeffff 50 e8???????? 59 8d85fcfeffff 59 }
$sequence_7 = { 56 6a01 ff7508 e8???????? 59 50 ff7508 }
$sequence_8 = { 8d4c2424 c684240804000013 e8???????? 50 }
$sequence_9 = { 68???????? 6801000080 ff15???????? 85c0 756b }
$sequence_10 = { c644245135 885c2452 c644245438 c644245531 c644245637 }
$sequence_11 = { 75ef ff15???????? 5f 5e }
$sequence_12 = { e8???????? 89842494000000 8b442424 6a00 50 8d8c24a4000000 }
$sequence_13 = { c684240404000009 e8???????? 8d4c2410 c684240004000007 e8???????? 68b6000000 8d542414 }
$sequence_14 = { e8???????? b941000000 33c0 8dbc24ec000000 be???????? f3ab }
$sequence_15 = { 8d8c2488000000 e8???????? 55 55 }
condition:
7 of them and filesize < 57344
}
Strings (16 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 56 6800040000 8d85f8faffff 6a00 50 e8???????? 83c40c } | |
| $sequence_1 | hex | { 8d85f8feffff 50 c645fc72 c645fd62 ff15???????? 8bf0 } | |
| $sequence_2 | hex | { 83c420 85f6 7437 56 } | |
| $sequence_3 | hex | { 59 50 ff7508 ff15???????? 56 ff15???????? } | |
| $sequence_4 | hex | { 6a32 ff15???????? 8d85f8faffff 50 68???????? e8???????? 59 } | |
| $sequence_5 | hex | { 56 ff15???????? 8d85ecfdffff 50 8d85f0feffff 50 ff15???????? } | |
| $sequence_6 | hex | { 8d85fcfeffff 50 e8???????? 59 8d85fcfeffff 59 } | |
| $sequence_7 | hex | { 56 6a01 ff7508 e8???????? 59 50 ff7508 } | |
| $sequence_8 | hex | { 8d4c2424 c684240804000013 e8???????? 50 } | |
| $sequence_9 | hex | { 68???????? 6801000080 ff15???????? 85c0 756b } | |
| $sequence_10 | hex | { c644245135 885c2452 c644245438 c644245531 c644245637 } | |
| $sequence_11 | hex | { 75ef ff15???????? 5f 5e } | |
| $sequence_12 | hex | { e8???????? 89842494000000 8b442424 6a00 50 8d8c24a4000000 } | |
| $sequence_13 | hex | { c684240404000009 e8???????? 8d4c2410 c684240004000007 e8???????? 68b6000000 8d542414 } | |
| $sequence_14 | hex | { e8???????? b941000000 33c0 8dbc24ec000000 be???????? f3ab } | |
| $sequence_15 | hex | { 8d8c2488000000 e8???????? 55 55 } |
Condition
7 of them and filesize < 57344In plain words (Heuristic)
- The file must be smaller than 57344 (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: 609623dc-549f-57b1-8b2d-3525d67579fa
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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