Analysis

  • max time kernel
    120s
  • max time network
    110s
  • platform
    windows10-1703_x64
  • resource
    win10-20231129-en
  • resource tags

    arch:x64arch:x86image:win10-20231129-enlocale:en-usos:windows10-1703-x64system
  • submitted
    13/12/2023, 23:35

General

  • Target

    d661b08dfac49bac58f07815ff8d3d680007f05cb3db878439c16ac9913abd9a.exe

  • Size

    1.6MB

  • MD5

    b7f343ab07d73b9d3206829f49bc5942

  • SHA1

    0ccd7ef84c0f87fd80d76b8a969da3ed152b9bd6

  • SHA256

    d661b08dfac49bac58f07815ff8d3d680007f05cb3db878439c16ac9913abd9a

  • SHA512

    810185825af3fadf3e9a00db88242436d54753371fcbf13936e2b1896748911eedd0b63a23a3ebaf56283625d9080708fefa81fec7a6ffec641546bf20ee95e9

  • SSDEEP

    49152:80ceOGgUYYEmluRKYoFh4kGWusbQnIyDi1E1uonTKi/OjCCNG:1XOGgUYC4RKXFhrusbaDkE1u

Malware Config

Signatures

  • Drops startup file 1 IoCs
  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • 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 3 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Looks up external IP address via web service 1 IoCs

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

  • Drops file in System32 directory 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Creates scheduled task(s) 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d661b08dfac49bac58f07815ff8d3d680007f05cb3db878439c16ac9913abd9a.exe
    "C:\Users\Admin\AppData\Local\Temp\d661b08dfac49bac58f07815ff8d3d680007f05cb3db878439c16ac9913abd9a.exe"
    1⤵
    • Drops startup file
    • Accesses Microsoft Outlook profiles
    • Adds Run key to start application
    • Drops file in System32 directory
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    • outlook_office_path
    • outlook_win_path
    PID:400
    • C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /f /RU "Admin" /tr "C:\ProgramData\OfficeTrackerNMP131\OfficeTrackerNMP131.exe" /tn "OfficeTrackerNMP131 HR" /sc HOURLY /rl HIGHEST
      2⤵
      • Creates scheduled task(s)
      PID:4532
    • C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /f /RU "Admin" /tr "C:\ProgramData\OfficeTrackerNMP131\OfficeTrackerNMP131.exe" /tn "OfficeTrackerNMP131 LG" /sc ONLOGON /rl HIGHEST
      2⤵
      • Creates scheduled task(s)
      PID:3140
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 400 -s 1664
      2⤵
      • Program crash
      PID:2408
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -s WPDBusEnum
    1⤵
      PID:4180
    • \??\c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k localsystemnetworkrestricted -s fhsvc
      1⤵
        PID:3780

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            • C:\ProgramData\OfficeTrackerNMP131\OfficeTrackerNMP131.exe

              Filesize

              1.6MB

              MD5

              b7f343ab07d73b9d3206829f49bc5942

              SHA1

              0ccd7ef84c0f87fd80d76b8a969da3ed152b9bd6

              SHA256

              d661b08dfac49bac58f07815ff8d3d680007f05cb3db878439c16ac9913abd9a

              SHA512

              810185825af3fadf3e9a00db88242436d54753371fcbf13936e2b1896748911eedd0b63a23a3ebaf56283625d9080708fefa81fec7a6ffec641546bf20ee95e9

            • C:\Users\Admin\AppData\Local\Temp\grandUIAA0u85XelkMqjc\information.txt

              Filesize

              3KB

              MD5

              c8469a6c19edb39b8746a1c6eccc3a3e

              SHA1

              b7d52d3afef4affd2f2f7f6e11bc58ce476b95cb

              SHA256

              1ca76ac99fb89401f7a4297da67bb2b311c7b03b6ca4eb4463136e6372077dfc

              SHA512

              28f7070ee6e0408f46b53f9649c060c6e45359f4bfba6ab2cd356311e68438fe9d839eeca269c139915efa0b26cdf45ab9f222f1bec38edd5d9c363af8e23d60

            • C:\Users\Admin\AppData\Local\Temp\posterBoxA0u85XelkMqjc\QdX9ITDLyCRBWeb Data

              Filesize

              92KB

              MD5

              d540e45d4e0edb6aab5ed14cc52f1fa5

              SHA1

              0c9279b204416dfa86ee22993bd3325b5bc762b1

              SHA256

              ddd7cbb13ec9dca8859d1a0f54d3f326c0097a8d2809636d96d2e4d9cfa86153

              SHA512

              3dc3b50b4948f522f4746a0ef63cdc40995dad3a3ac901b277a37296a33eee2977121f7aa529d9ef7f0cb878c6e15fac6c5570f1e5f73e73b5379633bd0caf9f