YARA · Malpedia signator rules
MALPEDIA_Win_Isaacwiper_Auto
autogenerated rule brought to you by yara-signator
MalwareIsaacwiperMalpedia 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: Isaacwiper.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-isaacwiper-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Isaacwiper_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "8b07c7aa-1138-5bb6-b193-0c825a3e98fc"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.isaacwiper"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.isaacwiper_auto.yar#L1-L125"
= "N/A"
= "4b0dacbf2562698736242d25b33b286fee192f0056990080203cfe77f1c8ccca"
= 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 = { 6683bdccfdffff00 7409 83c002 66833800 75f7 8d8dccfdffff 8bd3 }
$sequence_1 = { 8b01 56 8d7178 8b4004 c7443088d0270310 }
$sequence_2 = { 8be5 5d c3 8bc3 c1e802 8d3c82 }
$sequence_3 = { f20f59148580f90210 660f5834c590010310 660f54c5 f20f5ce8 f20f58fa f20f10d8 }
$sequence_4 = { 8b08 85c9 742a 8b5630 8b1a }
$sequence_5 = { 53 8b5d08 8b0485e8670310 56 57 8bfb }
$sequence_6 = { 8b4008 8b34b8 85f6 75d3 85db 7413 8d4df8 }
$sequence_7 = { 03fb 897dfc c7473000000000 c7470800000000 c7471000000000 c7471401020000 c7471806000000 }
$sequence_8 = { 56 ff15???????? 83f801 7521 8b45f4 }
$sequence_9 = { 3b4d10 5f 5e 0f95c0 5b 8be5 5d }
condition:
7 of them and filesize < 467968
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 6683bdccfdffff00 7409 83c002 66833800 75f7 8d8dccfdffff 8bd3 } | |
| $sequence_1 | hex | { 8b01 56 8d7178 8b4004 c7443088d0270310 } | |
| $sequence_2 | hex | { 8be5 5d c3 8bc3 c1e802 8d3c82 } | |
| $sequence_3 | hex | { f20f59148580f90210 660f5834c590010310 660f54c5 f20f5ce8 f20f58fa f20f10d8 } | |
| $sequence_4 | hex | { 8b08 85c9 742a 8b5630 8b1a } | |
| $sequence_5 | hex | { 53 8b5d08 8b0485e8670310 56 57 8bfb } | |
| $sequence_6 | hex | { 8b4008 8b34b8 85f6 75d3 85db 7413 8d4df8 } | |
| $sequence_7 | hex | { 03fb 897dfc c7473000000000 c7470800000000 c7471000000000 c7471401020000 c7471806000000 } | |
| $sequence_8 | hex | { 56 ff15???????? 83f801 7521 8b45f4 } | |
| $sequence_9 | hex | { 3b4d10 5f 5e 0f95c0 5b 8be5 5d } |
Condition
7 of them and filesize < 467968In plain words (Heuristic)
- The file must be smaller than 467968 (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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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: 8b07c7aa-1138-5bb6-b193-0c825a3e98fc
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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