YARA · Malpedia signator rules
MALPEDIA_Win_Photoloader_Auto
autogenerated rule brought to you by yara-signator
MalwarePhotoloaderMalpedia 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: Photoloader.
It defines 18 patterns (0 text, 18 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-photoloader-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Photoloader_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "6c751be1-c2cb-5243-adb8-0d3b0ee080b0"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.photoloader"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.photoloader_auto.yar#L1-L178"
= "N/A"
= "4ef9abae65ee48675c18344bccc98eacf875c4cac6a37cb56292b6b1626aa103"
= 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 = { 25ffffff00 0d00000005 e9???????? 8bd7 397b1c 7640 }
$sequence_1 = { f7411400000020 7407 8b41f8 3901 }
$sequence_2 = { 0fa2 894704 33c9 b800000040 }
$sequence_3 = { 33c9 b800000040 0fa2 895f0c }
$sequence_4 = { 33ff 8bf7 8d6f10 ff15???????? 0f31 }
$sequence_5 = { c0c003 0fb6c8 8bc1 83e10f }
$sequence_6 = { e8???????? 85c0 7512 ff15???????? 25ffffff00 0d00000003 }
$sequence_7 = { 7417 448bc2 0f31 48c1e220 480bc2 }
$sequence_8 = { 4c03da 4585c0 7420 498d4b10 f7411400000020 }
$sequence_9 = { 488bcd ffd0 ff15???????? 25ffffff00 }
$sequence_10 = { 7512 ff15???????? 25ffffff00 0d00000007 eb4a 397b1c 7629 }
$sequence_11 = { 55 33ed c744241804000000 56 }
$sequence_12 = { 7461 8d4c2410 51 8d4c2424 51 53 }
$sequence_13 = { 89742414 eb1b 8d4101 89742414 89442410 8d4601 }
$sequence_14 = { 759a 50 51 53 55 }
$sequence_15 = { 03f8 8d0c7b e8???????? 03f8 }
$sequence_16 = { 8bf9 33f6 33c9 0fa2 894500 }
$sequence_17 = { 7504 8907 8bf0 8d6c2410 33c9 b801000080 }
condition:
7 of them and filesize < 107520
}
Strings (18 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 25ffffff00 0d00000005 e9???????? 8bd7 397b1c 7640 } | |
| $sequence_1 | hex | { f7411400000020 7407 8b41f8 3901 } | |
| $sequence_2 | hex | { 0fa2 894704 33c9 b800000040 } | |
| $sequence_3 | hex | { 33c9 b800000040 0fa2 895f0c } | |
| $sequence_4 | hex | { 33ff 8bf7 8d6f10 ff15???????? 0f31 } | |
| $sequence_5 | hex | { c0c003 0fb6c8 8bc1 83e10f } | |
| $sequence_6 | hex | { e8???????? 85c0 7512 ff15???????? 25ffffff00 0d00000003 } | |
| $sequence_7 | hex | { 7417 448bc2 0f31 48c1e220 480bc2 } | |
| $sequence_8 | hex | { 4c03da 4585c0 7420 498d4b10 f7411400000020 } | |
| $sequence_9 | hex | { 488bcd ffd0 ff15???????? 25ffffff00 } | |
| $sequence_10 | hex | { 7512 ff15???????? 25ffffff00 0d00000007 eb4a 397b1c 7629 } | |
| $sequence_11 | hex | { 55 33ed c744241804000000 56 } | |
| $sequence_12 | hex | { 7461 8d4c2410 51 8d4c2424 51 53 } | |
| $sequence_13 | hex | { 89742414 eb1b 8d4101 89742414 89442410 8d4601 } | |
| $sequence_14 | hex | { 759a 50 51 53 55 } | |
| $sequence_15 | hex | { 03f8 8d0c7b e8???????? 03f8 } | |
| $sequence_16 | hex | { 8bf9 33f6 33c9 0fa2 894500 } | |
| $sequence_17 | hex | { 7504 8907 8bf0 8d6c2410 33c9 b801000080 } |
Condition
7 of them and filesize < 107520In plain words (Heuristic)
- The file must be smaller than 107520 (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: 6c751be1-c2cb-5243-adb8-0d3b0ee080b0
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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