Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05-11-2022 04:08

General

  • Target

    tmp.exe

  • Size

    226KB

  • MD5

    f30dc6dd8fe2e44bf9b8c45115e6f83c

  • SHA1

    cf0033fda00be69b914807455b696b37c24ad9cf

  • SHA256

    1d05865cde860a1f608fd49bb66177de78e910bb2dc231b57908a388dea5c0c2

  • SHA512

    7116d1742238ee2299f135a9f5d35ed0ff857710eb7c8ca2d99c32cab68ed9b39c906219c3933fc2bdd776319ca13ceebb345b25816898ac347a6eff6c818d72

  • SSDEEP

    3072:qUJoFfWzzl+cSMgi/+Ddy9YOmX3ucUiO0avrbjIO127nn9ubNZnf1wAUYqqRKgsM:qweEp5l9rkuWzcEfn9ySIi+3MuOZW

Malware Config

Extracted

Family

formbook

Campaign

f4ca

Decoy

omFHB5ajfJi1UEIEV9XcoRw=

UBjJkmQPyprdhcFF/bdCWQ==

evGKkBUj1je+otcfpw==

KgvGVeOATSt3nug0BIOm2JvOQycB

Lv6o3K0r9aSjI0lr9fg1txw=

LH1jJb/HieQpsEdqWCQTvX2PmsDVIeg=

99dte0XauJfk6Xv+uQxJFgA1gMktBA==

21FkkGB9gMniDQw2ffu6

r4lKBM/q6TZwVZfS

F+14qHeVWi56KdQ=

BgWXRsVoICMvvQ==

I+EozFl0Uy56KdQ=

xoXCgEllKEbWfjFCCLo=

qo9G1lXvvGt5GkxrLQWw

ORNlYic0PJ2ip4geEFSv

Yj+GFpvFxy0uVYx1fLI/XQ==

XL+veIKPjOTe4fjvFs+n

D2JKVAfuakXCAyoEvw==

voWJU81tH56wvt/vImbCcgVd

dVEcwFrmb8bZ4vXvFs+n

Signatures

  • Formbook

    Formbook is a data stealing malware which is capable of stealing data.

  • Executes dropped EXE 2 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
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 62 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of WriteProcessMemory
    PID:376
    • C:\Users\Admin\AppData\Local\Temp\tmp.exe
      "C:\Users\Admin\AppData\Local\Temp\tmp.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4856
      • C:\Users\Admin\AppData\Local\Temp\yuyojlpdd.exe
        "C:\Users\Admin\AppData\Local\Temp\yuyojlpdd.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of WriteProcessMemory
        PID:3044
        • C:\Users\Admin\AppData\Local\Temp\yuyojlpdd.exe
          "C:\Users\Admin\AppData\Local\Temp\yuyojlpdd.exe"
          4⤵
          • Executes dropped EXE
          • Checks computer location settings
          • Suspicious use of SetThreadContext
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of AdjustPrivilegeToken
          PID:2160
    • C:\Windows\SysWOW64\msdt.exe
      "C:\Windows\SysWOW64\msdt.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:1288
      • C:\Program Files\Mozilla Firefox\Firefox.exe
        "C:\Program Files\Mozilla Firefox\Firefox.exe"
        3⤵
          PID:4904

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Defense Evasion

    Modify Registry

    1
    T1112

    Discovery

    Query Registry

    1
    T1012

    System Information Discovery

    2
    T1082

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\uxihpr.zx
      Filesize

      5KB

      MD5

      d54e51cfe2eb61eecb8518184631a900

      SHA1

      a4c20513e75bf1785f4b5658328f7623635f6d53

      SHA256

      807d62f7c4ec7ff7804a8a88ce0d2f5be710e163d65e6c709ec9f6a675f73d10

      SHA512

      d0e8397bfaf380622d50aeeb85ae63c3f547a2237f4a5ce43b2f67f79464bbfe46c7f539f1ea42622e7f958aba42375d45d75838bb10403cb398ed61352597f0

    • C:\Users\Admin\AppData\Local\Temp\wvvuxvn.cc
      Filesize

      185KB

      MD5

      91c02a03c98d9b9fcefdf2c006ad2e51

      SHA1

      00bc63213b18fe2a1e54560e93c74c83837bbdcb

      SHA256

      014d38ffaa628106fab91c0f5ca1682624b80891f681ddce51a12dd569ff4c89

      SHA512

      4fb0f6585fb93af610cdfd06eb06c7038fca1e75226fd440d43a7d948e5492621bf25a9bd69271f00029c27a44563bf4ee8f3bc12651407192497567cf120fad

    • C:\Users\Admin\AppData\Local\Temp\yuyojlpdd.exe
      Filesize

      8KB

      MD5

      b4d86ad7d19d5582a1cdd164f173d183

      SHA1

      62e9ea7e253105348dc04f87f49c5b83fd6abdc6

      SHA256

      8b034e2390d543fca81b71124c29304ee20a8d053170709fa11f061141ed11d2

      SHA512

      a512b5161249857d13640dfd1797c8dfd097e42a402ba546f6a4b8e272e3b050f3c2453faa86fe41cdda5a5216d2a50131c0c683ff0bfaf8887ef150a63a0180

    • C:\Users\Admin\AppData\Local\Temp\yuyojlpdd.exe
      Filesize

      8KB

      MD5

      b4d86ad7d19d5582a1cdd164f173d183

      SHA1

      62e9ea7e253105348dc04f87f49c5b83fd6abdc6

      SHA256

      8b034e2390d543fca81b71124c29304ee20a8d053170709fa11f061141ed11d2

      SHA512

      a512b5161249857d13640dfd1797c8dfd097e42a402ba546f6a4b8e272e3b050f3c2453faa86fe41cdda5a5216d2a50131c0c683ff0bfaf8887ef150a63a0180

    • C:\Users\Admin\AppData\Local\Temp\yuyojlpdd.exe
      Filesize

      8KB

      MD5

      b4d86ad7d19d5582a1cdd164f173d183

      SHA1

      62e9ea7e253105348dc04f87f49c5b83fd6abdc6

      SHA256

      8b034e2390d543fca81b71124c29304ee20a8d053170709fa11f061141ed11d2

      SHA512

      a512b5161249857d13640dfd1797c8dfd097e42a402ba546f6a4b8e272e3b050f3c2453faa86fe41cdda5a5216d2a50131c0c683ff0bfaf8887ef150a63a0180

    • memory/376-153-0x00000000085B0000-0x000000000873B000-memory.dmp
      Filesize

      1.5MB

    • memory/376-151-0x00000000085B0000-0x000000000873B000-memory.dmp
      Filesize

      1.5MB

    • memory/376-143-0x0000000008170000-0x00000000082CD000-memory.dmp
      Filesize

      1.4MB

    • memory/1288-147-0x0000000000690000-0x00000000006E7000-memory.dmp
      Filesize

      348KB

    • memory/1288-152-0x0000000000A30000-0x0000000000A5D000-memory.dmp
      Filesize

      180KB

    • memory/1288-150-0x0000000002860000-0x00000000028EF000-memory.dmp
      Filesize

      572KB

    • memory/1288-149-0x0000000002CB0000-0x0000000002FFA000-memory.dmp
      Filesize

      3.3MB

    • memory/1288-144-0x0000000000000000-mapping.dmp
    • memory/1288-148-0x0000000000A30000-0x0000000000A5D000-memory.dmp
      Filesize

      180KB

    • memory/2160-137-0x0000000000000000-mapping.dmp
    • memory/2160-146-0x0000000000400000-0x000000000042F000-memory.dmp
      Filesize

      188KB

    • memory/2160-145-0x0000000000401000-0x000000000042F000-memory.dmp
      Filesize

      184KB

    • memory/2160-142-0x0000000000F40000-0x0000000000F50000-memory.dmp
      Filesize

      64KB

    • memory/2160-141-0x00000000013F0000-0x000000000173A000-memory.dmp
      Filesize

      3.3MB

    • memory/2160-140-0x0000000000401000-0x000000000042F000-memory.dmp
      Filesize

      184KB

    • memory/2160-139-0x0000000000400000-0x000000000042F000-memory.dmp
      Filesize

      188KB

    • memory/3044-132-0x0000000000000000-mapping.dmp