YARA · Malpedia signator rules
MALPEDIA_Win_Webc2_Bolid_Auto
autogenerated rule brought to you by yara-signator
MalwareWebc2 BolidMalpedia 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 Bolid.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-webc2-bolid-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Webc2_Bolid_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "716ef3b0-82d3-51b2-853d-5eec600e9585"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.webc2_bolid"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.webc2_bolid_auto.yar#L1-L125"
= "N/A"
= "ea324af3e8557090b9806bb3099e79345357ea9abb6340eef576f2e3b10a818a"
= 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 = { 7445 8b4dc4 8bd6 c1e204 03d1 8d8558ffffff 52 }
$sequence_1 = { f7d1 49 51 68???????? 8d8d78ffffff e8???????? }
$sequence_2 = { 8841ff b001 eb30 49 51 }
$sequence_3 = { 0f85db000000 6a01 8d4d88 c645fc0f e8???????? 6a01 }
$sequence_4 = { e8???????? 83c404 8b4df4 5f 5e 32c0 64890d00000000 }
$sequence_5 = { c645fc16 c6451b5c e8???????? 8d4dd0 }
$sequence_6 = { 8b4f08 3bc8 7305 e8???????? 8bcf e8???????? 8b4708 }
$sequence_7 = { 8bf1 89742408 c706???????? 8b4644 33db 3bc3 }
$sequence_8 = { 83e203 83f908 7229 f3a5 ff2495b8734000 8bc7 ba03000000 }
$sequence_9 = { 895c2434 8d4c2428 8d54244c 51 c68424000200000c 83ec10 }
condition:
7 of them and filesize < 163840
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 7445 8b4dc4 8bd6 c1e204 03d1 8d8558ffffff 52 } | |
| $sequence_1 | hex | { f7d1 49 51 68???????? 8d8d78ffffff e8???????? } | |
| $sequence_2 | hex | { 8841ff b001 eb30 49 51 } | |
| $sequence_3 | hex | { 0f85db000000 6a01 8d4d88 c645fc0f e8???????? 6a01 } | |
| $sequence_4 | hex | { e8???????? 83c404 8b4df4 5f 5e 32c0 64890d00000000 } | |
| $sequence_5 | hex | { c645fc16 c6451b5c e8???????? 8d4dd0 } | |
| $sequence_6 | hex | { 8b4f08 3bc8 7305 e8???????? 8bcf e8???????? 8b4708 } | |
| $sequence_7 | hex | { 8bf1 89742408 c706???????? 8b4644 33db 3bc3 } | |
| $sequence_8 | hex | { 83e203 83f908 7229 f3a5 ff2495b8734000 8bc7 ba03000000 } | |
| $sequence_9 | hex | { 895c2434 8d4c2428 8d54244c 51 c68424000200000c 83ec10 } |
Condition
7 of them and filesize < 163840In plain words (Heuristic)
- The file must be smaller than 163840 (a cheap guard that skips large files).
- At least 7 patterns in the rule must match.
Test this rule in your browser
Drop a file to scan it with this rule using YARA-X compiled to WebAssembly. Nothing is uploaded.
Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.
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: 716ef3b0-82d3-51b2-853d-5eec600e9585
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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