M_APT_VIRTUALPITA_3

Description

Finds opcodes from 409dd8 to 409e46 in fe34b7c071d96dac498b72a4a07cb246 to set the HISTFILE environment variable to 'F' with a putenv() after loading each character individually.

Query · yara

strings:
      $x = { 4? 8b 4? ?? c6 00 48 4? 8b 4? ?? 4? 83 c0 05 c6 00 49 4? 8b 4? ?? 4? 83 c0 01 c6 00 49 4? 8b 4? ?? 4? 83 c0 06 c6 00 4c 4? 8b 4? ?? 4? 83 c0 02 c6 00 53 4? 8b 4? ?? 4? 83 c0 07 c6 00 45 4? 8b 4? ?? 4? 83 c0 03 c6 00 54 4? 8b 4? ?? 4? 83 c0 08 c6 00 3d 4? 8b 4? ?? 4? 83 c0 04 c6 00 46 4? 8b 4? ?? 4? 83 c0 09 c6 00 00 4? 8b 7? ?? e8 }
   condition:
      uint32(0) == 0x464c457f and all of them
Raw source M_APT_VIRTUALPITA_3 · YARA
Esc
Published by Neo23x0/signature-base ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
rule M_APT_VIRTUALPITA_3 {
   meta:
      author = "Mandiant"
      md5 = "fe34b7c071d96dac498b72a4a07cb246"
      description = "Finds opcodes from 409dd8 to 409e46 in fe34b7c071d96dac498b72a4a07cb246 to set the HISTFILE environment variable to 'F' with a putenv() after loading each character individually."
      id = "29ea2db0-4ab2-5e9c-8d42-7590ceabf99a"
   strings:
      $x = { 4? 8b 4? ?? c6 00 48 4? 8b 4? ?? 4? 83 c0 05 c6 00 49 4? 8b 4? ?? 4? 83 c0 01 c6 00 49 4? 8b 4? ?? 4? 83 c0 06 c6 00 4c 4? 8b 4? ?? 4? 83 c0 02 c6 00 53 4? 8b 4? ?? 4? 83 c0 07 c6 00 45 4? 8b 4? ?? 4? 83 c0 03 c6 00 54 4? 8b 4? ?? 4? 83 c0 08 c6 00 3d 4? 8b 4? ?? 4? 83 c0 04 c6 00 46 4? 8b 4? ?? 4? 83 c0 09 c6 00 00 4? 8b 7? ?? e8 }
   condition:
      uint32(0) == 0x464c457f and all of them
}

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