(YARA) YARA_XOR_Hunt

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rule XOR_hunt
{
  meta:
    author = "Thomas Roccia | @fr0gger_"
    description = "100DaysOfYara - An attempt to catch malicious/suspicious pe file using xor for some data"
    status = "experimental"

  strings:
    $s1 = "http://" xor
    $s2 = "https://" xor
    $s3 = "ftp://" xor
    $s4 = "This program cannot be run in DOS mode" xor
    $s5 = "Mozilla/5.0" xor
    $s6 = "cmd /c" xor
    $s7 = "-ep bypass" xor

  condition:
     uint16(0) == 0x5A4D and any of them
}

Associated Techniques

Technique Name Technique ID's Snippet(s) OS
XOR Operation U0701 E1027.m02

Matching Samples 10 most recent

Sample Name Matching Techniques First Seen Last Seen
Grimace.dll 6 2025-05-11 4 hours, 14 minutes ago
Updater.exe 4 2025-05-08 2 days, 22 hours ago
DgtAutoTTS.exe 3 2025-05-06 5 days, 14 hours ago
WalkSimulator-NonUtilla (2).dll 6 2025-05-06 5 days, 15 hours ago
FinalBuilder8.exe 5 2025-05-05 6 days, 7 hours ago
viewer.exe 4 2025-05-01 1 week, 3 days ago
decoder.exe 4 2025-04-30 1 week, 4 days ago
Xtra_Slayed-cleaned-cleaned.exe 5 2025-04-29 1 week, 5 days ago
hmpalert.exe 8 2025-04-20 1 week, 5 days ago
ZAP.exe 6 2025-04-26 2 weeks ago
View All

Created

January 4, 2024

Last Revised

January 4, 2024