Analysis

  • max time kernel
    189s
  • max time network
    194s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    28/11/2022, 07:07

General

  • Target

    PO-BCF220340.rtf

  • Size

    28KB

  • MD5

    532676a539f1be2b2b5132724a593f3d

  • SHA1

    3b5c05bcd36be469400aaf08e84cf959b02c10bf

  • SHA256

    72741fbda226683f04a4966fe43d16d963aa22991521c27212db349b8cef3362

  • SHA512

    1ab8e7e85a399b19965528dbca1a5d91cab50a8cf6632bf4aa3bf9ba6970b001f953c1186c4e0bca95e6fa072ab0e389b05485746e2ab521cfd8304723812821

  • SSDEEP

    768:wFx0XaIsnPRIa4fwJMADBOxM7WdcLCCiYrUD:wf0Xvx3EMADBO1cSYs

Malware Config

Extracted

Family

agenttesla

Credentials

Signatures

  • AgentTesla

    Agent Tesla is a remote access tool (RAT) written in visual basic.

  • Blocklisted process makes network request 2 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Windows directory 1 IoCs
  • Office loads VBA resources, possible macro or embedded object present
  • Launches Equation Editor 1 TTPs 1 IoCs

    Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

  • Modifies Internet Explorer settings 1 TTPs 31 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 17 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\PO-BCF220340.rtf"
    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:840
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:1520
    • C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
      "C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
      1⤵
      • Blocklisted process makes network request
      • Loads dropped DLL
      • Launches Equation Editor
      • Suspicious use of WriteProcessMemory
      PID:1092
      • C:\Users\Admin\AppData\Roaming\obinna896523.exe
        "C:\Users\Admin\AppData\Roaming\obinna896523.exe"
        2⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1008
        • C:\Users\Admin\AppData\Roaming\obinna896523.exe
          "C:\Users\Admin\AppData\Roaming\obinna896523.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1600

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Roaming\obinna896523.exe

      Filesize

      756KB

      MD5

      63985df175b201eb9e1f77df87a8ccb5

      SHA1

      9c45cb87ab12d6c02c6bedc96dc13c5bf895ad30

      SHA256

      7cda2a9a3552100a50efbfcc25a594459c3324726317030df80ee63adef3eb6a

      SHA512

      54aaab06aed389142a18f6416dfa8c0b0bbf48ee1ef690322d88ad4741595c93aff9f510e9c14595c6064bdae411eb4e0fa59927112d0bbba11b61d72831ab83

    • C:\Users\Admin\AppData\Roaming\obinna896523.exe

      Filesize

      756KB

      MD5

      63985df175b201eb9e1f77df87a8ccb5

      SHA1

      9c45cb87ab12d6c02c6bedc96dc13c5bf895ad30

      SHA256

      7cda2a9a3552100a50efbfcc25a594459c3324726317030df80ee63adef3eb6a

      SHA512

      54aaab06aed389142a18f6416dfa8c0b0bbf48ee1ef690322d88ad4741595c93aff9f510e9c14595c6064bdae411eb4e0fa59927112d0bbba11b61d72831ab83

    • C:\Users\Admin\AppData\Roaming\obinna896523.exe

      Filesize

      756KB

      MD5

      63985df175b201eb9e1f77df87a8ccb5

      SHA1

      9c45cb87ab12d6c02c6bedc96dc13c5bf895ad30

      SHA256

      7cda2a9a3552100a50efbfcc25a594459c3324726317030df80ee63adef3eb6a

      SHA512

      54aaab06aed389142a18f6416dfa8c0b0bbf48ee1ef690322d88ad4741595c93aff9f510e9c14595c6064bdae411eb4e0fa59927112d0bbba11b61d72831ab83

    • \Users\Admin\AppData\Roaming\obinna896523.exe

      Filesize

      756KB

      MD5

      63985df175b201eb9e1f77df87a8ccb5

      SHA1

      9c45cb87ab12d6c02c6bedc96dc13c5bf895ad30

      SHA256

      7cda2a9a3552100a50efbfcc25a594459c3324726317030df80ee63adef3eb6a

      SHA512

      54aaab06aed389142a18f6416dfa8c0b0bbf48ee1ef690322d88ad4741595c93aff9f510e9c14595c6064bdae411eb4e0fa59927112d0bbba11b61d72831ab83

    • \Users\Admin\AppData\Roaming\obinna896523.exe

      Filesize

      756KB

      MD5

      63985df175b201eb9e1f77df87a8ccb5

      SHA1

      9c45cb87ab12d6c02c6bedc96dc13c5bf895ad30

      SHA256

      7cda2a9a3552100a50efbfcc25a594459c3324726317030df80ee63adef3eb6a

      SHA512

      54aaab06aed389142a18f6416dfa8c0b0bbf48ee1ef690322d88ad4741595c93aff9f510e9c14595c6064bdae411eb4e0fa59927112d0bbba11b61d72831ab83

    • memory/840-54-0x00000000729A1000-0x00000000729A4000-memory.dmp

      Filesize

      12KB

    • memory/840-55-0x0000000070421000-0x0000000070423000-memory.dmp

      Filesize

      8KB

    • memory/840-56-0x000000005FFF0000-0x0000000060000000-memory.dmp

      Filesize

      64KB

    • memory/840-57-0x000000007140D000-0x0000000071418000-memory.dmp

      Filesize

      44KB

    • memory/840-58-0x0000000076041000-0x0000000076043000-memory.dmp

      Filesize

      8KB

    • memory/1008-68-0x0000000004E60000-0x0000000004F08000-memory.dmp

      Filesize

      672KB

    • memory/1008-65-0x00000000000C0000-0x0000000000184000-memory.dmp

      Filesize

      784KB

    • memory/1008-69-0x0000000000450000-0x0000000000466000-memory.dmp

      Filesize

      88KB

    • memory/1008-73-0x0000000000750000-0x000000000078E000-memory.dmp

      Filesize

      248KB

    • memory/1008-71-0x0000000000470000-0x000000000047E000-memory.dmp

      Filesize

      56KB

    • memory/1008-72-0x00000000051B0000-0x0000000005226000-memory.dmp

      Filesize

      472KB

    • memory/1520-70-0x000007FEFBE91000-0x000007FEFBE93000-memory.dmp

      Filesize

      8KB

    • memory/1600-74-0x0000000000400000-0x000000000043C000-memory.dmp

      Filesize

      240KB

    • memory/1600-75-0x0000000000400000-0x000000000043C000-memory.dmp

      Filesize

      240KB

    • memory/1600-77-0x0000000000400000-0x000000000043C000-memory.dmp

      Filesize

      240KB

    • memory/1600-78-0x0000000000400000-0x000000000043C000-memory.dmp

      Filesize

      240KB

    • memory/1600-79-0x0000000000400000-0x000000000043C000-memory.dmp

      Filesize

      240KB

    • memory/1600-83-0x0000000000400000-0x000000000043C000-memory.dmp

      Filesize

      240KB

    • memory/1600-85-0x0000000000400000-0x000000000043C000-memory.dmp

      Filesize

      240KB