(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
BBHloader.exe 6 2026-03-10 3 days, 23 hours ago
_vmp_d5b8_cache.tmp 1 2026-03-08 5 days, 15 hours ago
greeze_dupe.exe 1 2026-03-08 5 days, 21 hours ago
library2.dll 6 2026-03-06 1 week ago
library.dll 8 2026-03-06 1 week ago
DelphinDesktop.dll 8 2026-03-05 1 week, 2 days ago
548964a6ea3d573cfae71aa5e2d0...0fc323c6432e96d2ad55b80d.exe 7 2026-03-04 1 week, 2 days ago
test_dll_packed.dll 4 2026-03-03 1 week, 3 days ago
AION.exe 5 2026-03-03 1 week, 3 days ago
um.exe 7 2026-03-02 1 week, 4 days ago
View All

Created

January 4, 2024

Last Revised

January 4, 2024