YARA · SEKOIA.IO Community
SEKOIA_Apt_Toddycat_Toddybox_Strings
Detects ToddyCat's ToddyBox binary
- Author
- Sekoia.io
- Date
- 2023-11-20
- Modified
- 2024-12-19
- Score / Quality
- 75 / 80
What this rule detects
Detects ToddyCat's ToddyBox binary
Targets: Windows PE.
It defines 8 patterns (8 text, 0 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
apt-toddycat-toddybox-strings.yarDetection Rule License 1.1
rule SEKOIA_Apt_Toddycat_Toddybox_Strings : FILE
{
meta:
= "Detects ToddyCat's ToddyBox binary"
= "Sekoia.io"
= "fde3df24-ebd7-4327-998e-bddaa08835da"
= "2023-11-20"
= "2024-12-19"
= "https://github.com/SEKOIA-IO/Community"
= "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/apt_toddycat_toddybox_strings.yar#L1-L24"
= "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
= "b71fad12d4485268cbeff98b8a8d6067ac8f62164be60cdb61f3f37ab471a247"
= 75
= 80
= "FILE"
= "1.0"
= "TLP:CLEAR"
strings:
$ = "Wait a while to upload the next file..."
$ = "[-] Error Msg: %s"
$ = "[-] Error Msg: Connect Errors or Proxy Errors"
$ = "[-] arg missing!"
$ = "[-] Get module dir failed!"
$ = "[-] Dir error!"
$ = "Auto Get Proxy %S"
$ = "Dropbox-API-Arg"
condition:
uint16be( 0 ) == 0x4d5a and filesize < 1MB and all of them
}
Strings (8 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $ | text | "Wait a while to upload the next file..." | |
| $ | text | "[-] Error Msg: %s" | |
| $ | text | "[-] Error Msg: Connect Errors or Proxy Errors" | |
| $ | text | "[-] arg missing!" | |
| $ | text | "[-] Get module dir failed!" | |
| $ | text | "[-] Dir error!" | |
| $ | text | "Auto Get Proxy %S" | |
| $ | text | "Dropbox-API-Arg" |
Condition
uint16be( 0 ) == 0x4d5a and filesize < 1MB and all of themIn plain words (Heuristic)
- The file must start with “MZ” — a Windows executable (PE).
- The file must be smaller than 1MB (a cheap guard that skips large files).
- 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.
Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.
References
Licence & attribution
Author: Sekoia.io
Source repository: SEKOIA.IO Community @ a438a5901a
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: fde3df24-ebd7-4327-998e-bddaa08835da
Metadata
| version | 1.0 |
|---|---|
| classification | TLP:CLEAR |
Tags:FILE
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