YARA · Malpedia signator rules
MALPEDIA_Win_Bid_Ransomware_Auto
autogenerated rule brought to you by yara-signator
MalwareBid RansomwareMalpedia 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: Bid Ransomware.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-bid-ransomware-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Bid_Ransomware_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "ce47ce7f-14e1-59ae-ba57-79394ad6dc42"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.bid_ransomware"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.bid_ransomware_auto.yar#L1-L127"
= "N/A"
= "f1877b67a4049109e0b2de66aad3ce4469b6223b173e84f5ebaf276fe703ce2d"
= 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 = { 8d45a4 50 6a00 6a00 68???????? 6a00 }
$sequence_1 = { 68???????? e8???????? 85c0 0f848d000000 8b7508 ff7508 }
$sequence_2 = { e8???????? 60 6a00 6a02 e8???????? 8bd8 c785d4fdffff2c020000 }
$sequence_3 = { e8???????? c9 c3 55 8bec 60 }
$sequence_4 = { e8???????? 83f800 7605 8945f4 eb02 ebc9 }
$sequence_5 = { ff759c e8???????? 8b45a8 0500040000 894590 6800010000 }
$sequence_6 = { 6a00 6a00 e8???????? 6a0f 50 }
$sequence_7 = { ff75f4 e8???????? ff75fc e8???????? ff05???????? ff75e4 e8???????? }
$sequence_8 = { e8???????? 8d85d4fdffff 50 53 e8???????? ebb4 53 }
$sequence_9 = { 6a00 8d00 50 e8???????? eb79 8b5814 66813b5c5c }
condition:
7 of them and filesize < 57344
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 8d45a4 50 6a00 6a00 68???????? 6a00 } | |
| $sequence_1 | hex | { 68???????? e8???????? 85c0 0f848d000000 8b7508 ff7508 } | |
| $sequence_2 | hex | { e8???????? 60 6a00 6a02 e8???????? 8bd8 c785d4fdffff2c020000 } | |
| $sequence_3 | hex | { e8???????? c9 c3 55 8bec 60 } | |
| $sequence_4 | hex | { e8???????? 83f800 7605 8945f4 eb02 ebc9 } | |
| $sequence_5 | hex | { ff759c e8???????? 8b45a8 0500040000 894590 6800010000 } | |
| $sequence_6 | hex | { 6a00 6a00 e8???????? 6a0f 50 } | |
| $sequence_7 | hex | { ff75f4 e8???????? ff75fc e8???????? ff05???????? ff75e4 e8???????? } | |
| $sequence_8 | hex | { e8???????? 8d85d4fdffff 50 53 e8???????? ebb4 53 } | |
| $sequence_9 | hex | { 6a00 8d00 50 e8???????? eb79 8b5814 66813b5c5c } |
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: ce47ce7f-14e1-59ae-ba57-79394ad6dc42
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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