Analysis

  • max time kernel
    147s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220721-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220721-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22-07-2022 15:19

General

  • Target

    tmp.exe

  • Size

    517KB

  • MD5

    a09f93f7606aa64851c9a8f82317b72f

  • SHA1

    c33ea2eb219a088610847905251e5e2c3d2c87a2

  • SHA256

    c9777cb78779de98104f1a01584f9df07e39b7ace7d5e6686d225e7261bd9447

  • SHA512

    c5923ec47cc02a048fbbe8876c6f982d56dd6ea8936848db5a51ec6ad8ce16df9271a00c187a9ea653beaa490ba769c1339a5c3384180ba4d3961c471b7dfd59

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 3 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
  • Suspicious behavior: EnumeratesProcesses 44 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of WriteProcessMemory
    PID:2120
    • 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:1304
      • 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:1456
    • C:\Windows\SysWOW64\systray.exe
      "C:\Windows\SysWOW64\systray.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of AdjustPrivilegeToken
      PID:4276

Network

MITRE ATT&CK Matrix ATT&CK v6

Discovery

Query Registry

1
T1012

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/1304-130-0x00000000005A0000-0x0000000000628000-memory.dmp
    Filesize

    544KB

  • memory/1304-131-0x0000000007980000-0x0000000007F24000-memory.dmp
    Filesize

    5.6MB

  • memory/1304-132-0x00000000074B0000-0x0000000007542000-memory.dmp
    Filesize

    584KB

  • memory/1304-133-0x00000000074A0000-0x00000000074AA000-memory.dmp
    Filesize

    40KB

  • memory/1304-134-0x000000000B010000-0x000000000B0AC000-memory.dmp
    Filesize

    624KB

  • memory/1456-139-0x0000000001670000-0x0000000001681000-memory.dmp
    Filesize

    68KB

  • memory/1456-136-0x0000000000400000-0x000000000042C000-memory.dmp
    Filesize

    176KB

  • memory/1456-138-0x00000000011D0000-0x000000000151A000-memory.dmp
    Filesize

    3.3MB

  • memory/1456-135-0x0000000000000000-mapping.dmp
  • memory/1456-142-0x0000000000400000-0x000000000042C000-memory.dmp
    Filesize

    176KB

  • memory/2120-140-0x0000000008A50000-0x0000000008B74000-memory.dmp
    Filesize

    1.1MB

  • memory/2120-147-0x000000000A900000-0x000000000AA4F000-memory.dmp
    Filesize

    1.3MB

  • memory/2120-148-0x000000000A900000-0x000000000AA4F000-memory.dmp
    Filesize

    1.3MB

  • memory/4276-141-0x0000000000000000-mapping.dmp
  • memory/4276-143-0x0000000000820000-0x0000000000826000-memory.dmp
    Filesize

    24KB

  • memory/4276-144-0x0000000003190000-0x00000000034DA000-memory.dmp
    Filesize

    3.3MB

  • memory/4276-145-0x00000000012A0000-0x00000000012CC000-memory.dmp
    Filesize

    176KB

  • memory/4276-146-0x0000000003070000-0x0000000003100000-memory.dmp
    Filesize

    576KB