YARA · Embee Research
EMBEERESEARCH_Win_Mystic_Stealer_Bytecodes_Sep_2023
No description has been set in the source file - EmbeeResearch
- Author
- Matthew @ Embee_reserch
- Date
- 2023-09-21
- Modified
- 2023-11-12
- Score / Quality
- 75 / 75
What this rule detects
No description has been set in the source file - EmbeeResearch
Associated malware family: Mystic, Mystic Stealer.
It defines 13 patterns (0 text, 13 hex, 0 regex).
YARA-X says: warning[duplicate_pattern_value]: duplicate pattern value
Summary generated from the rule's metadata and condition.
Rule source
rule EMBEERESEARCH_Win_Mystic_Stealer_Bytecodes_Sep_2023
{
meta:
= "No description has been set in the source file - EmbeeResearch"
= "Matthew @ Embee_reserch"
= "ef7c51e1-9c8c-5b66-bc1e-f35a796c84f2"
= "2023-09-21"
= "2023-11-12"
= "https://github.com/embee-research/Yara-detection-rules/"
= "https://github.com/embee-research/Yara-detection-rules//blob/ac56d6f6fd2a30c8cb6e5c0455d6519210a8b0f4/Rules/win_mystic_stealer_bytecodes_sep_2023.yar#L1-L29"
= "N/A"
= "ef9fce75334befe0b435798c0b61dab1239ea5bc62b97654943676dd96dc6318"
= "36d8cb1447e2c5da60d2b86bf29856919c25f8e71a17f1d0d61d03c5e0505e4b"
= "e907c22288dacb37efa07481fef7a0d4ec0ce42954f12b2572ea7f5ffeecf313"
= "f68b6ef307e48b7ff6f944cfcf9c906a83611400af5af7d8621227874356960d"
= 75
= 75
= ""
strings:
$s1 = {99 d3 d8 c5}
$s2 = {99 b7 66 df}
$s3 = {cb 45 92 f8}
$s4 = {7b cc e1 54}
$s5 = {7b 9c 29 17}
$s6 = {01 c4 fb 83}
$s7 = {b6 0f 74 e3}
$s8 = {93 58 b5 ee}
$s9 = {81 d9 df be}
$s10 = {7b d8 62 00}
$s12 = {81 d9 df be}
$s13 = {7b d8 62 00}
$s14 = {77 4a bc ac}
condition:
( all of them )
}
Strings (13 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $s1 | hex | {99 d3 d8 c5} | |
| $s2 | hex | {99 b7 66 df} | |
| $s3 | hex | {cb 45 92 f8} | |
| $s4 | hex | {7b cc e1 54} | |
| $s5 | hex | {7b 9c 29 17} | |
| $s6 | hex | {01 c4 fb 83} | |
| $s7 | hex | {b6 0f 74 e3} | |
| $s8 | hex | {93 58 b5 ee} | |
| $s9 | hex | {81 d9 df be} | |
| $s10 | hex | {7b d8 62 00} | |
| $s12 | hex | {81 d9 df be} | |
| $s13 | hex | {7b d8 62 00} | |
| $s14 | hex | {77 4a bc ac} |
Condition
( all of them )In plain words (Heuristic)
- All patterns in the rule must match.
Test this rule in your browser
Drop a file to scan it with this rule using YARA-X compiled to WebAssembly. Nothing is uploaded.
Sample hashes
Hashes of samples the author lists in the rule's meta (look them up in your threat-intelligence platform).
- ef9fce75334befe0b435798c0b61dab1239ea5bc62b97654943676dd96dc6318
- 36d8cb1447e2c5da60d2b86bf29856919c25f8e71a17f1d0d61d03c5e0505e4b
- e907c22288dacb37efa07481fef7a0d4ec0ce42954f12b2572ea7f5ffeecf313
Licence & attribution
Author: Matthew @ Embee_reserch
Source repository: Embee Research @ ac56d6f6fd
Licence: Detection Rule License 1.1 (repository licence)
Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.
Rule id: ef7c51e1-9c8c-5b66-bc1e-f35a796c84f2
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