Analysis

  • max time kernel
    143s
  • max time network
    179s
  • platform
    windows7_x64
  • resource
    win7-en-20210920
  • submitted
    21-10-2021 13:33

General

  • Target

    statistics.010.21.21.doc

  • Size

    34KB

  • MD5

    81a0f5b3638ae19f39850639ca26323a

  • SHA1

    c5079a46f9391690ecb2023c54c8022b375e507e

  • SHA256

    c39abbf3cd7a0a4055f7b36f73c1b3bce6b02a74d6fd700a46c3993e37544ee6

  • SHA512

    b317a4bce70605eb5ea6be5818be274454d56a202c5c652682291c574bd5a1a63a8ae0646d09771ccdfaca08d1ee7c069c6fb236d257a78de32bacf65743e872

Malware Config

Signatures

  • Bazar Loader

    Detected loader normally used to deploy BazarBackdoor malware.

  • Process spawned unexpected child process 1 IoCs

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

  • Bazar/Team9 Loader payload 1 IoCs
  • Blocklisted process makes network request 1 IoCs
  • Downloads MZ/PE file
  • Loads dropped DLL 2 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Office loads VBA resources, possible macro or embedded object present
  • Modifies Internet Explorer settings 1 TTPs 32 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious use of SetWindowsHookEx 16 IoCs
  • Suspicious use of WriteProcessMemory 22 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\statistics.010.21.21.doc"
    1⤵
    • Drops file in Windows directory
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1308
    • C:\Windows\SysWOW64\mshta.exe
      "C:\Windows\SysWOW64\mshta.exe" "C:\users\public\lineMyCaroline.hta"
      2⤵
      • Process spawned unexpected child process
      • Blocklisted process makes network request
      • Modifies Internet Explorer settings
      • Suspicious use of WriteProcessMemory
      PID:1820
      • C:\Windows\SysWOW64\regsvr32.exe
        "C:\Windows\System32\regsvr32.exe" c:\users\public\lineYou.jpg
        3⤵
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:1736
        • C:\Windows\system32\regsvr32.exe
          c:\users\public\lineYou.jpg
          4⤵
          • Loads dropped DLL
          PID:892
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:1884

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Defense Evasion

    Modify Registry

    1
    T1112

    Discovery

    System Information Discovery

    1
    T1082

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\users\public\lineMyCaroline.hta
      MD5

      4ee98889de12d1ca3c1ca877d6279168

      SHA1

      539c1f07e86a1dabec305cb89992b948f70edb55

      SHA256

      a3fe2af0e6b795d7a998ef2479e4fc7af361057e4d2831a7ec9492fed89cb599

      SHA512

      6f00ea415d55913bbf6a12d30dde7ff59a911d908519797711b3e7163d83c53b3446d75151f366856f8e9887f175c6128aa03fe6cc701b43451e9de1d5c0a2c8

    • \??\c:\users\public\lineYou.jpg
      MD5

      16c3938d5acdf0d6a5f60e896929a829

      SHA1

      473d21433bd937c11dd9aae1c7904ec4817bbb5f

      SHA256

      b8f5ae1da133778ed8bb13d73bec57ab648c3549ca2c2cbd1ca18add71de993f

      SHA512

      f7aef4ad57aea046d37975647414896915d5590eeefab7be285929c7b6f550c2d091a1270f9f2f9450537a18cdd06c39543b8d1a421bf19c650d52d46973b95b

    • \Users\Public\lineYou.jpg
      MD5

      16c3938d5acdf0d6a5f60e896929a829

      SHA1

      473d21433bd937c11dd9aae1c7904ec4817bbb5f

      SHA256

      b8f5ae1da133778ed8bb13d73bec57ab648c3549ca2c2cbd1ca18add71de993f

      SHA512

      f7aef4ad57aea046d37975647414896915d5590eeefab7be285929c7b6f550c2d091a1270f9f2f9450537a18cdd06c39543b8d1a421bf19c650d52d46973b95b

    • \Users\Public\lineYou.jpg
      MD5

      16c3938d5acdf0d6a5f60e896929a829

      SHA1

      473d21433bd937c11dd9aae1c7904ec4817bbb5f

      SHA256

      b8f5ae1da133778ed8bb13d73bec57ab648c3549ca2c2cbd1ca18add71de993f

      SHA512

      f7aef4ad57aea046d37975647414896915d5590eeefab7be285929c7b6f550c2d091a1270f9f2f9450537a18cdd06c39543b8d1a421bf19c650d52d46973b95b

    • memory/892-69-0x0000000001E50000-0x0000000002076000-memory.dmp
      Filesize

      2.1MB

    • memory/892-66-0x0000000000000000-mapping.dmp
    • memory/1308-57-0x0000000075331000-0x0000000075333000-memory.dmp
      Filesize

      8KB

    • memory/1308-54-0x0000000072421000-0x0000000072424000-memory.dmp
      Filesize

      12KB

    • memory/1308-56-0x000000005FFF0000-0x0000000060000000-memory.dmp
      Filesize

      64KB

    • memory/1308-55-0x000000006FEA1000-0x000000006FEA3000-memory.dmp
      Filesize

      8KB

    • memory/1308-70-0x000000005FFF0000-0x0000000060000000-memory.dmp
      Filesize

      64KB

    • memory/1736-62-0x0000000000000000-mapping.dmp
    • memory/1820-58-0x0000000000000000-mapping.dmp
    • memory/1884-61-0x000007FEFB931000-0x000007FEFB933000-memory.dmp
      Filesize

      8KB

    • memory/1884-60-0x0000000000000000-mapping.dmp