YARA · Malpedia signator rules
MALPEDIA_Win_Systembc_Auto
autogenerated rule brought to you by yara-signator
MalwareSystembcMalpedia 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: Systembc.
It defines 16 patterns (0 text, 16 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-systembc-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Systembc_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "be08117d-8246-530f-9d5f-cd6143f1e35f"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.systembc"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.systembc_auto.yar#L1-L169"
= "N/A"
= "a9818f1f55e16b84edae3af4f5f9f1c3955cbf2e948518d2fcc753adba968256"
= 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 = { b000 ae 75fd 8a57fe 80fa39 }
$sequence_1 = { e8???????? 8b450c 8945e4 c745e801000000 c745ec06000000 8d45dc }
$sequence_2 = { 53 57 56 8b7d10 33c0 ab }
$sequence_3 = { ff7518 6a00 6a00 ff75fc e8???????? 6a00 }
$sequence_4 = { 803f00 740b 837d1000 7407 }
$sequence_5 = { 7403 ff47fc 8b4508 ab 8b450c }
$sequence_6 = { 8b45f8 8b08 8b91a8000000 50 ffd2 8d85f4fbffff }
$sequence_7 = { 6a10 68???????? e8???????? 8d85bcfbffff }
$sequence_8 = { 66837aff00 7502 eb2e 837d0cff }
$sequence_9 = { 89848dbcfbffff 482d04040404 48ffc9 75ee 4833c0 488b7d10 4833db }
$sequence_10 = { ff15???????? 4883c420 e9???????? 66c78560ffffff0200 807e0703 7553 480fb65e08 }
$sequence_11 = { e8???????? 4883c420 4883ec20 488d8e90010000 488d55a0 }
$sequence_12 = { 488b7520 488b7d10 488b4d28 4833db }
$sequence_13 = { 4883ec20 488b4d98 488d9560ffffff 49c7c010000000 ff15???????? 4883c420 }
$sequence_14 = { c68575ffffff00 c68576ffffff01 48c78510ffffff01000000 4883ec20 488b4d98 }
$sequence_15 = { 83f900 7fe4 4883bdb8fbffff01 0f84cf000000 48b8fcfdfeff00000000 48c7c140000000 89848dbcfbffff }
condition:
7 of them and filesize < 75776
}
Strings (16 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { b000 ae 75fd 8a57fe 80fa39 } | |
| $sequence_1 | hex | { e8???????? 8b450c 8945e4 c745e801000000 c745ec06000000 8d45dc } | |
| $sequence_2 | hex | { 53 57 56 8b7d10 33c0 ab } | |
| $sequence_3 | hex | { ff7518 6a00 6a00 ff75fc e8???????? 6a00 } | |
| $sequence_4 | hex | { 803f00 740b 837d1000 7407 } | |
| $sequence_5 | hex | { 7403 ff47fc 8b4508 ab 8b450c } | |
| $sequence_6 | hex | { 8b45f8 8b08 8b91a8000000 50 ffd2 8d85f4fbffff } | |
| $sequence_7 | hex | { 6a10 68???????? e8???????? 8d85bcfbffff } | |
| $sequence_8 | hex | { 66837aff00 7502 eb2e 837d0cff } | |
| $sequence_9 | hex | { 89848dbcfbffff 482d04040404 48ffc9 75ee 4833c0 488b7d10 4833db } | |
| $sequence_10 | hex | { ff15???????? 4883c420 e9???????? 66c78560ffffff0200 807e0703 7553 480fb65e08 } | |
| $sequence_11 | hex | { e8???????? 4883c420 4883ec20 488d8e90010000 488d55a0 } | |
| $sequence_12 | hex | { 488b7520 488b7d10 488b4d28 4833db } | |
| $sequence_13 | hex | { 4883ec20 488b4d98 488d9560ffffff 49c7c010000000 ff15???????? 4883c420 } | |
| $sequence_14 | hex | { c68575ffffff00 c68576ffffff01 48c78510ffffff01000000 4883ec20 488b4d98 } | |
| $sequence_15 | hex | { 83f900 7fe4 4883bdb8fbffff01 0f84cf000000 48b8fcfdfeff00000000 48c7c140000000 89848dbcfbffff } |
Condition
7 of them and filesize < 75776In plain words (Heuristic)
- The file must be smaller than 75776 (a cheap guard that skips large files).
- At least 7 patterns in the rule must match.
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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: be08117d-8246-530f-9d5f-cd6143f1e35f
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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