YARA · Malpedia signator rules
MALPEDIA_Win_Havex_Rat_Auto
autogenerated rule brought to you by yara-signator
MalwareHavex RatMalpedia 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: Havex Rat.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-havex-rat-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Havex_Rat_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "7991246d-f84f-56bc-94fa-31ca00c4b2e6"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.havex_rat"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.havex_rat_auto.yar#L1-L131"
= "N/A"
= "0af582c8543e405171c63f9b74cf05a22861e4a138f7bfd62577aee523a19a0b"
= 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 = { e8???????? 33db 895dfc b800020000 8d773c c7472003000000 895f24 }
$sequence_1 = { 8bf0 3bf3 742f 68???????? 8d4dc0 e8???????? 8d45c0 }
$sequence_2 = { 8b0c81 8bc6 e8???????? 8b45dc 0fb7444358 0fb60c07 51 }
$sequence_3 = { 2b470c 6a1c 59 99 f7f9 8b4d08 }
$sequence_4 = { c745fc02000000 8b06 8b4004 57 c70406???????? e8???????? }
$sequence_5 = { e8???????? c3 6a1c b8???????? e8???????? 8b450c 83781810 }
$sequence_6 = { 8b7f04 eb03 83c704 33f6 56 50 53 }
$sequence_7 = { b801040000 8b4d64 5f 33cd 5e e8???????? }
$sequence_8 = { c1e704 03fe 038f94c90000 039798c90000 8b7ddc 0fb77c7b18 897de0 }
$sequence_9 = { 8d7304 8b55ec 33ff 85d2 7616 2bc8 3b7de8 }
condition:
7 of them and filesize < 892928
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { e8???????? 33db 895dfc b800020000 8d773c c7472003000000 895f24 } | |
| $sequence_1 | hex | { 8bf0 3bf3 742f 68???????? 8d4dc0 e8???????? 8d45c0 } | |
| $sequence_2 | hex | { 8b0c81 8bc6 e8???????? 8b45dc 0fb7444358 0fb60c07 51 } | |
| $sequence_3 | hex | { 2b470c 6a1c 59 99 f7f9 8b4d08 } | |
| $sequence_4 | hex | { c745fc02000000 8b06 8b4004 57 c70406???????? e8???????? } | |
| $sequence_5 | hex | { e8???????? c3 6a1c b8???????? e8???????? 8b450c 83781810 } | |
| $sequence_6 | hex | { 8b7f04 eb03 83c704 33f6 56 50 53 } | |
| $sequence_7 | hex | { b801040000 8b4d64 5f 33cd 5e e8???????? } | |
| $sequence_8 | hex | { c1e704 03fe 038f94c90000 039798c90000 8b7ddc 0fb77c7b18 897de0 } | |
| $sequence_9 | hex | { 8d7304 8b55ec 33ff 85d2 7616 2bc8 3b7de8 } |
Condition
7 of them and filesize < 892928In plain words (Heuristic)
- The file must be smaller than 892928 (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: 7991246d-f84f-56bc-94fa-31ca00c4b2e6
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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