YARA · Malpedia signator rules
MALPEDIA_Win_Poscardstealer_Auto
autogenerated rule brought to you by yara-signator
MalwarePoscardstealerMalpedia 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: Poscardstealer.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-poscardstealer-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Poscardstealer_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "93381abe-05cc-5861-8a9d-79af1fc11ddc"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.poscardstealer"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.poscardstealer_auto.yar#L1-L122"
= "N/A"
= "0e2c0b695090149a314e3640c533f832c1baa01c7b5cdf940bb738b4a06f3aef"
= 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 = { 33c0 668b4d08 663b88600a4200 740d 83c002 }
$sequence_1 = { 64a300000000 8b35???????? 8975ac 3b35???????? 0f84fc000000 }
$sequence_2 = { 8917 83c704 89bd80edffff eb68 8b8d84edffff 3bd1 }
$sequence_3 = { 8b45b0 56 50 51 ff15???????? 8b5590 8bcf }
$sequence_4 = { 83ff0c 7e79 8bc7 f7d8 8945c8 eb03 8b45c8 }
$sequence_5 = { 50 8d45f4 64a300000000 8b7508 8b4528 }
$sequence_6 = { 8bce c645fc12 e8???????? 837de810 c645fc01 }
$sequence_7 = { 68???????? 50 e8???????? 83c40c 3bc7 7514 83fe01 }
$sequence_8 = { 8d34c5f05b4200 833e00 7513 50 e8???????? 59 85c0 }
$sequence_9 = { 8b45e0 8a8064614200 08443b1d 0fb64601 }
condition:
7 of them and filesize < 362496
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 33c0 668b4d08 663b88600a4200 740d 83c002 } | |
| $sequence_1 | hex | { 64a300000000 8b35???????? 8975ac 3b35???????? 0f84fc000000 } | |
| $sequence_2 | hex | { 8917 83c704 89bd80edffff eb68 8b8d84edffff 3bd1 } | |
| $sequence_3 | hex | { 8b45b0 56 50 51 ff15???????? 8b5590 8bcf } | |
| $sequence_4 | hex | { 83ff0c 7e79 8bc7 f7d8 8945c8 eb03 8b45c8 } | |
| $sequence_5 | hex | { 50 8d45f4 64a300000000 8b7508 8b4528 } | |
| $sequence_6 | hex | { 8bce c645fc12 e8???????? 837de810 c645fc01 } | |
| $sequence_7 | hex | { 68???????? 50 e8???????? 83c40c 3bc7 7514 83fe01 } | |
| $sequence_8 | hex | { 8d34c5f05b4200 833e00 7513 50 e8???????? 59 85c0 } | |
| $sequence_9 | hex | { 8b45e0 8a8064614200 08443b1d 0fb64601 } |
Condition
7 of them and filesize < 362496In plain words (Heuristic)
- The file must be smaller than 362496 (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: 93381abe-05cc-5861-8a9d-79af1fc11ddc
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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