Analysis

  • max time kernel
    150s
  • max time network
    154s
  • platform
    windows7_x64
  • resource
    win7-20220715-en
  • resource tags

    arch:x64arch:x86image:win7-20220715-enlocale:en-usos:windows7-x64system
  • submitted
    18-07-2022 02:12

General

  • Target

    tmp.exe

  • Size

    641KB

  • MD5

    85be6547409011c0804230f2f09f7ca3

  • SHA1

    33eb9c66bb959332f963ab928fdbd655ac9e5e4e

  • SHA256

    1d9fc02237d06ae3ee5ea85ae14a05ab41ee99f03ac660e3f6360ac6864bf7fd

  • SHA512

    5e9e790f043d47bf21cd77caa556d18b957ab2c9587ef63836f84b8f42b102a8de085a2c6c2cf5a504b5a034c74dc25f2961b8415779311323e71c15b4432b7b

Malware Config

Extracted

Family

xloader

Version

2.8

Campaign

nn40

Decoy

LYAg0yANOGEAGeaFOrA/

MQWuERZplP+VZy/uszI=

CF0oDN0JimIaGy/uszI=

ltJnyC+ReohYaiTvj1qbEA==

B9OkgdctVKBAFjSUaw==

sbDVwSZVVqVB11/deow8GA==

v1gHDe0pzno=

i+/0n2vHUfGPR98k77tukZ90MQ==

SUtCnbS96Qm21g==

8X9qzyt1dpAo31jXrXfKb49fBPY=

5KlPxqHzSstuFjSUaw==

0r/Kesv/zuanroxvNQW0Gm8=

FFgS7kfPYAqpdhhgRgnBJHY=

LgusAHrkrIoWr0FWIe2o/04UXPw=

vBq9Gvxa9wbKbS/uszI=

Z+q6HAZNNeqwwQ==

wbS4fMb06SjU5Kbseow8GA==

1mZEuZvJ/m0L9bof56PkkZ90MQ==

JCJIM74lHk/o+tiFOrA/

d14FrM8rGEgIzVkT67+3XaEh

Signatures

  • Xloader

    Xloader is a rebranded version of Formbook malware.

  • suricata: ET MALWARE FormBook CnC Checkin (GET)

    suricata: ET MALWARE FormBook CnC Checkin (GET)

  • Xloader payload 4 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Suspicious use of SetThreadContext 3 IoCs
  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 22 IoCs
  • Suspicious behavior: MapViewOfSection 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SendNotifyMessage 2 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:1408
    • C:\Users\Admin\AppData\Local\Temp\tmp.exe
      "C:\Users\Admin\AppData\Local\Temp\tmp.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious use of WriteProcessMemory
      PID:1164
      • C:\Users\Admin\AppData\Local\Temp\tmp.exe
        "C:\Users\Admin\AppData\Local\Temp\tmp.exe"
        3⤵
        • Checks computer location settings
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of AdjustPrivilegeToken
        PID:1948
    • C:\Windows\SysWOW64\raserver.exe
      "C:\Windows\SysWOW64\raserver.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Modifies Internet Explorer settings
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1480
      • C:\Program Files\Mozilla Firefox\Firefox.exe
        "C:\Program Files\Mozilla Firefox\Firefox.exe"
        3⤵
          PID:364

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Defense Evasion

    Modify Registry

    1
    T1112

    Discovery

    Query Registry

    1
    T1012

    System Information Discovery

    1
    T1082

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/1164-55-0x0000000076021000-0x0000000076023000-memory.dmp
      Filesize

      8KB

    • memory/1164-56-0x0000000000430000-0x000000000044C000-memory.dmp
      Filesize

      112KB

    • memory/1164-57-0x0000000000460000-0x000000000046A000-memory.dmp
      Filesize

      40KB

    • memory/1164-58-0x0000000005020000-0x000000000508A000-memory.dmp
      Filesize

      424KB

    • memory/1164-59-0x00000000006A0000-0x00000000006D2000-memory.dmp
      Filesize

      200KB

    • memory/1164-54-0x0000000000D70000-0x0000000000E16000-memory.dmp
      Filesize

      664KB

    • memory/1408-68-0x0000000006DF0000-0x0000000006F61000-memory.dmp
      Filesize

      1.4MB

    • memory/1408-77-0x00000000063E0000-0x00000000064E9000-memory.dmp
      Filesize

      1.0MB

    • memory/1408-76-0x00000000063E0000-0x00000000064E9000-memory.dmp
      Filesize

      1.0MB

    • memory/1480-72-0x0000000000950000-0x000000000096C000-memory.dmp
      Filesize

      112KB

    • memory/1480-69-0x0000000000000000-mapping.dmp
    • memory/1480-73-0x0000000000080000-0x00000000000AC000-memory.dmp
      Filesize

      176KB

    • memory/1480-74-0x0000000001F00000-0x0000000002203000-memory.dmp
      Filesize

      3.0MB

    • memory/1480-75-0x0000000001D70000-0x0000000001E00000-memory.dmp
      Filesize

      576KB

    • memory/1948-65-0x00000000009C0000-0x0000000000CC3000-memory.dmp
      Filesize

      3.0MB

    • memory/1948-67-0x0000000000130000-0x0000000000141000-memory.dmp
      Filesize

      68KB

    • memory/1948-64-0x000000000041F640-mapping.dmp
    • memory/1948-70-0x0000000000400000-0x000000000042C000-memory.dmp
      Filesize

      176KB

    • memory/1948-63-0x0000000000400000-0x000000000042C000-memory.dmp
      Filesize

      176KB

    • memory/1948-61-0x0000000000400000-0x000000000042C000-memory.dmp
      Filesize

      176KB

    • memory/1948-60-0x0000000000400000-0x000000000042C000-memory.dmp
      Filesize

      176KB