YARA · ditekSHen detection
DITEKSHEN_INDICATOR_TOOL_SCR_Amady
Detects screenshot stealer DLL. Dropped by Amadey
- Author
- ditekSHen
- Date
- 2020-11-06
- Modified
- 2024-09-25
- Score / Quality
- 75 / 75
What this rule detects
Detects screenshot stealer DLL. Dropped by Amadey
Associated malware family: Amadey.
Targets: Windows PE.
It defines 5 patterns (5 text, 0 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
indicator-tool-scr-amady.yarBSD 2-Clause License
rule DITEKSHEN_INDICATOR_TOOL_SCR_Amady : FILE
{
meta:
= "Detects screenshot stealer DLL. Dropped by Amadey"
= "ditekSHen"
= "f7660899-ed12-5765-a856-6a1c7bbd8978"
= "2020-11-06"
= "2024-09-25"
= "https://github.com/ditekshen/detection"
= "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/yara/indicator_tools.yar#L308-L320"
= "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
= "9e7ab39976e3219f0c6c3ce5341442343cc4baf30757cd1c9d0c2d3845fdda2f"
= 75
= 75
= "FILE"
strings:
$s1 = "User-Agent: Uploador" fullword ascii
$s2 = "Content-Disposition: form-data; name=\"data\"; filename=\"" fullword ascii
$s3 = "WebUpload" fullword ascii
$s4 = "Cannot assign a %s to a %s%List does not allow duplicates ($0%x)%String" wide
$s5 = "scr.dll" fullword ascii
condition:
uint16( 0 ) == 0x5a4d and filesize < 700KB and 4 of them
}
Strings (5 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $s1 | text | "User-Agent: Uploador" | fullword ascii |
| $s2 | text | "Content-Disposition: form-data; name=\"data\"; filename=\"" | fullword ascii |
| $s3 | text | "WebUpload" | fullword ascii |
| $s4 | text | "Cannot assign a %s to a %s%List does not allow duplicates ($0%x)%String" | wide |
| $s5 | text | "scr.dll" | fullword ascii |
Condition
uint16( 0 ) == 0x5a4d and filesize < 700KB and 4 of themIn plain words (Heuristic)
- The file must start with “MZ” — a Windows executable (PE).
- The file must be smaller than 700KB (a cheap guard that skips large files).
- At least 4 patterns in the rule must match.
Test this rule in your browser
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References
Licence & attribution
Author: ditekSHen
Source repository: ditekSHen detection @ e76c93dcde
Licence: BSD 2-Clause License (repository licence)
Copyright notice: Copyright 2021 by ditekSHen (https://github.com/ditekshen/detection).
Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.
Rule id: f7660899-ed12-5765-a856-6a1c7bbd8978
Tags:FILE
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