YARA · Malpedia signator rules
MALPEDIA_Win_Webc2_Head_Auto
autogenerated rule brought to you by yara-signator
MalwareWebc2 HeadMalpedia 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: Webc2 Head.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-webc2-head-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Webc2_Head_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "d4e6e5cb-74a5-542a-9357-9594f4725991"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.webc2_head"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.webc2_head_auto.yar#L1-L120"
= "N/A"
= "394f3309d74a178201ba63d639ef72e0e8440ef340541d411459feea7eafad4e"
= 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 = { 8b442410 83c204 48 89542424 }
$sequence_1 = { 5e 5d 83c8ff 5b 81c4341c0000 }
$sequence_2 = { 8a15???????? b910000000 be???????? 8d7c2428 f3a5 895c2410 88542410 }
$sequence_3 = { 7e2a b910000000 be???????? 8dbc2474010000 f3a5 c1ea10 }
$sequence_4 = { 8d7c2414 c1e902 f3a5 8bca 83e103 f3a4 8b542414 }
$sequence_5 = { 55 ff15???????? a3???????? eb19 }
$sequence_6 = { 49 894c241c 8d942444040000 8d41fd 89542420 }
$sequence_7 = { 8d049500000000 8d0c52 89442410 894c2424 8b442420 8b00 8bc8 }
$sequence_8 = { f6c202 7410 8088????????20 8a9405ecfcffff ebe3 80a0e0b8400000 }
$sequence_9 = { 884502 7e2a b910000000 be???????? 8dbc2474010000 }
condition:
7 of them and filesize < 106496
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 8b442410 83c204 48 89542424 } | |
| $sequence_1 | hex | { 5e 5d 83c8ff 5b 81c4341c0000 } | |
| $sequence_2 | hex | { 8a15???????? b910000000 be???????? 8d7c2428 f3a5 895c2410 88542410 } | |
| $sequence_3 | hex | { 7e2a b910000000 be???????? 8dbc2474010000 f3a5 c1ea10 } | |
| $sequence_4 | hex | { 8d7c2414 c1e902 f3a5 8bca 83e103 f3a4 8b542414 } | |
| $sequence_5 | hex | { 55 ff15???????? a3???????? eb19 } | |
| $sequence_6 | hex | { 49 894c241c 8d942444040000 8d41fd 89542420 } | |
| $sequence_7 | hex | { 8d049500000000 8d0c52 89442410 894c2424 8b442420 8b00 8bc8 } | |
| $sequence_8 | hex | { f6c202 7410 8088????????20 8a9405ecfcffff ebe3 80a0e0b8400000 } | |
| $sequence_9 | hex | { 884502 7e2a b910000000 be???????? 8dbc2474010000 } |
Condition
7 of them and filesize < 106496In plain words (Heuristic)
- The file must be smaller than 106496 (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: d4e6e5cb-74a5-542a-9357-9594f4725991
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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