Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220113
  • submitted
    11-03-2022 23:29

General

  • Target

    Cslmw.exe

  • Size

    23KB

  • MD5

    f252b7a35b4b4af6a7dee8840b1e7132

  • SHA1

    e9fa1a744adc80c91203aaf06e4edbcd25cac199

  • SHA256

    4a5a4b370430e4f8fed7a3e8e7deb08321740497e0e693482352d2db973dbabd

  • SHA512

    389e94b834f64609e8b2a861f5697a3b5b7eee4e2f71b76ae19a616560bd1f8d1d3396cf13e657c41792e43caedd61fe6641983819bbf83f8625fbd693c65af5

Malware Config

Extracted

Family

xloader

Version

2.5

Campaign

ssac

Decoy

beautybybrin.com

oregemo.com

prospectoriq.com

blazermid.com

cloudnineloans.com

myyntisofta.com

filoupoils.com

web-solutiontnpasumo3.xyz

becbares.com

lines-hikkoshi.com

ohayouwww.com

writingdadsobituarywithdad.com

bridalbaes.com

jamshir.com

rangertots.com

dankbrobeans.com

titan111.com

uplearns.info

maxicashprokil.xyz

evc24.com

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
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • Enumerates system info in registry 2 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 42 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of WriteProcessMemory
    PID:2712
    • C:\Users\Admin\AppData\Local\Temp\Cslmw.exe
      "C:\Users\Admin\AppData\Local\Temp\Cslmw.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:600
      • C:\Users\Admin\AppData\Local\Temp\Cslmw.exe
        C:\Users\Admin\AppData\Local\Temp\Cslmw.exe
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of AdjustPrivilegeToken
        PID:4292
    • C:\Windows\SysWOW64\chkdsk.exe
      "C:\Windows\SysWOW64\chkdsk.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Enumerates system info in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4848
      • C:\Windows\SysWOW64\cmd.exe
        /c del "C:\Users\Admin\AppData\Local\Temp\Cslmw.exe"
        3⤵
          PID:780

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Persistence

    Registry Run Keys / Startup Folder

    1
    T1060

    Defense Evasion

    Modify Registry

    1
    T1112

    Discovery

    Query Registry

    1
    T1012

    System Information Discovery

    1
    T1082

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/600-130-0x0000000000FD0000-0x0000000000FDC000-memory.dmp
      Filesize

      48KB

    • memory/600-131-0x0000000005F30000-0x00000000064D4000-memory.dmp
      Filesize

      5.6MB

    • memory/600-132-0x0000000074DF0000-0x00000000755A0000-memory.dmp
      Filesize

      7.7MB

    • memory/600-133-0x0000000005A20000-0x0000000005AB2000-memory.dmp
      Filesize

      584KB

    • memory/600-134-0x0000000005980000-0x000000000598A000-memory.dmp
      Filesize

      40KB

    • memory/600-135-0x0000000005980000-0x0000000005F24000-memory.dmp
      Filesize

      5.6MB

    • memory/2712-147-0x0000000002DC0000-0x0000000002EAE000-memory.dmp
      Filesize

      952KB

    • memory/2712-142-0x0000000002AB0000-0x0000000002B72000-memory.dmp
      Filesize

      776KB

    • memory/4292-139-0x00000000013F0000-0x000000000173A000-memory.dmp
      Filesize

      3.3MB

    • memory/4292-141-0x00000000013B0000-0x00000000013C1000-memory.dmp
      Filesize

      68KB

    • memory/4292-140-0x000000000041D000-0x000000000041E000-memory.dmp
      Filesize

      4KB

    • memory/4292-138-0x0000000000400000-0x0000000000429000-memory.dmp
      Filesize

      164KB

    • memory/4292-136-0x0000000000400000-0x0000000000429000-memory.dmp
      Filesize

      164KB

    • memory/4848-144-0x0000000001200000-0x0000000001229000-memory.dmp
      Filesize

      164KB

    • memory/4848-143-0x0000000000670000-0x000000000067A000-memory.dmp
      Filesize

      40KB

    • memory/4848-145-0x0000000001A40000-0x0000000001D8A000-memory.dmp
      Filesize

      3.3MB

    • memory/4848-146-0x0000000001770000-0x0000000001800000-memory.dmp
      Filesize

      576KB