YARA · Embee Research
EMBEERESEARCH_Win_Exela_Stealer_Simple_Strings_Sep_2023
No description has been set in the source file - EmbeeResearch
- Author
- Matthew @embee_research
- Date
- 2023-09-24
- Modified
- 2023-09-26
- Score / Quality
- 75 / 75
What this rule detects
No description has been set in the source file - EmbeeResearch
Targets: .NET assembly.
It defines 10 patterns (10 text, 0 hex, 0 regex). YARA modules used: dotnet.
Summary generated from the rule's metadata and condition.
Rule source
Includes the imports needed to compile it on its own.
import "dotnet"
rule EMBEERESEARCH_Win_Exela_Stealer_Simple_Strings_Sep_2023
{
meta:
= "No description has been set in the source file - EmbeeResearch"
= "Matthew @embee_research"
= "e63aa1d3-997e-5200-93fc-869c177fe1a8"
= "2023-09-24"
= "2023-09-26"
= "https://github.com/embee-research/Yara-detection-rules/"
= "https://github.com/embee-research/Yara-detection-rules//blob/ac56d6f6fd2a30c8cb6e5c0455d6519210a8b0f4/Rules/win_exela_stealer_simple_strings_sep_2023.yar#L4-L32"
= "N/A"
= "bf5d70ca2faf355d86f4b40b58032f21e99c3944b1c5e199b9bb728258a95c1b"
= "2312b63fe86fd34eb12f42f079f470eb3af27ef8c199f3620253c828ad28441a"
= 75
= 75
= ""
strings:
$s1 = "https://i.instagram.com/api/v1/accounts/current_user/" wide
$s2 = "/create /f /sc onlogon /rl highest /tn \"AutoUpdateCheckerOnLogon\" /tr " wide
$s4 = "https://discord.com/api/webhooks/" wide
$s5 = "Browser : {0} | Name : {1} | Value : {2} | Date created (timestamp) : {3} | Date last used (timestamp) : {4} | Count {5}" wide
$s6 = "Browser : {0} | {1} {2}/{3} {4}" wide
$e1 = "Exela.Program" wide ascii
$e2 = "Exela.Wifi" wide ascii
$e3 = "Exela.Components" wide ascii
$e4 = "Exela Stealer" wide ascii
$e5 = "Exela.exe" wide ascii
condition:
dotnet.is_dotnet and ( ( all of ( $s* ) ) or ( 3 of ( $e* ) ) )
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $s1 | text | "https://i.instagram.com/api/v1/accounts/current_user/" | wide |
| $s2 | text | "/create /f /sc onlogon /rl highest /tn \"AutoUpdateCheckerOnLogon\" /tr " | wide |
| $s4 | text | "https://discord.com/api/webhooks/" | wide |
| $s5 | text | "Browser : {0} | Name : {1} | Value : {2} | Date created (timestamp) : {3} | Date last used (timestamp) : {4} | Count {5}" | wide |
| $s6 | text | "Browser : {0} | {1} {2}/{3} {4}" | wide |
| $e1 | text | "Exela.Program" | wide ascii |
| $e2 | text | "Exela.Wifi" | wide ascii |
| $e3 | text | "Exela.Components" | wide ascii |
| $e4 | text | "Exela Stealer" | wide ascii |
| $e5 | text | "Exela.exe" | wide ascii |
Condition
dotnet.is_dotnet and ( ( all of ( $s* ) ) or ( 3 of ( $e* ) ) )In plain words (Heuristic)
- All patterns in ( $s* ) must match.
- At least 3 patterns in ( $e* ) must match.
- Uses the dotnet module.
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).
- bf5d70ca2faf355d86f4b40b58032f21e99c3944b1c5e199b9bb728258a95c1b
Licence & attribution
Author: Matthew @embee_research
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: e63aa1d3-997e-5200-93fc-869c177fe1a8
Related rules
- MalwareEmbee Research· Matthew @embee_research· 2023-09-21