(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
main.exe 4 2025-12-14 4 days, 11 hours ago
efak.exe 6 2025-12-13 5 days, 4 hours ago
P8PA4H.exe 1 2025-12-11 1 week ago
cmd.exe 7 2025-12-10 1 week, 1 day ago
steghide.exe 6 2025-12-09 1 week, 2 days ago
setup.exe 11 2025-12-09 1 week, 2 days ago
738a31e7a0d96fe1b0ad6778db39...ac33ce8a84f26b71c00c26b9.exe 4 2025-12-07 1 week, 4 days ago
pafish64.exe 10 2025-12-06 1 week, 5 days ago
fpCSEvtSvc.scam 5 2025-12-01 2 weeks, 3 days ago
3KTrangXinhTQ.exe 2 2025-12-01 2 weeks, 4 days ago
View All

Created

January 4, 2024

Last Revised

January 4, 2024