Analysis

  • max time kernel
    141s
  • max time network
    146s
  • 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, 23:56

General

  • Target

    c976ef86799e581aee13ff4621b07ff9016011e5a530ceadc64d2679c247d5a9.exe

  • Size

    1.6MB

  • MD5

    cb1c58f0af677df803f261536bf42b46

  • SHA1

    91208ece05adefc2389f9f791030af2e5cef9ee3

  • SHA256

    c976ef86799e581aee13ff4621b07ff9016011e5a530ceadc64d2679c247d5a9

  • SHA512

    5a023e273993f35087b837f84c015909ed07a1705d7127fa37a3433da9fd2cefae417e94a75c41c0cb93c7bd2e3221ed66f1df8be732f9d98544077d2b585610

  • 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 2 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\c976ef86799e581aee13ff4621b07ff9016011e5a530ceadc64d2679c247d5a9.exe
    "C:\Users\Admin\AppData\Local\Temp\c976ef86799e581aee13ff4621b07ff9016011e5a530ceadc64d2679c247d5a9.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:4492
    • 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:4124
    • 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:4620
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4492 -s 1732
      2⤵
      • Program crash
      PID:4560
  • \??\c:\windows\system32\svchost.exe
    c:\windows\system32\svchost.exe -k localsystemnetworkrestricted -s fhsvc
    1⤵
      PID:4428
    • C:\Windows\system32\svchost.exe
      C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -s WPDBusEnum
      1⤵
        PID:4624

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            • C:\ProgramData\OfficeTrackerNMP131\OfficeTrackerNMP131.exe

              Filesize

              1.6MB

              MD5

              cb1c58f0af677df803f261536bf42b46

              SHA1

              91208ece05adefc2389f9f791030af2e5cef9ee3

              SHA256

              c976ef86799e581aee13ff4621b07ff9016011e5a530ceadc64d2679c247d5a9

              SHA512

              5a023e273993f35087b837f84c015909ed07a1705d7127fa37a3433da9fd2cefae417e94a75c41c0cb93c7bd2e3221ed66f1df8be732f9d98544077d2b585610

            • C:\Users\Admin\AppData\Local\Temp\grandUIAwch5FnMrcGkz_\information.txt

              Filesize

              3KB

              MD5

              bcb1af94a3fa641c14ae6ec79dca3fdc

              SHA1

              d18c622e61b7466d06ad728d2c8a61d9a0d6afc0

              SHA256

              dda3eb0b347c6322a04ed36757c95db05dae572e516d23f3051ff07711b44dc5

              SHA512

              c9aa0ef81cc23f6d0d81d2cdb5696370d5c2b7b0a2e1b94fd787a821b843e1a2d8cd8feab67602a962b8fcae93b58d2cb5288eb1cb6820d957c4206dc0b23e91

            • C:\Users\Admin\AppData\Local\Temp\posterBoxwch5FnMrcGkz_\QdX9ITDLyCRBWeb Data

              Filesize

              92KB

              MD5

              d540e45d4e0edb6aab5ed14cc52f1fa5

              SHA1

              0c9279b204416dfa86ee22993bd3325b5bc762b1

              SHA256

              ddd7cbb13ec9dca8859d1a0f54d3f326c0097a8d2809636d96d2e4d9cfa86153

              SHA512

              3dc3b50b4948f522f4746a0ef63cdc40995dad3a3ac901b277a37296a33eee2977121f7aa529d9ef7f0cb878c6e15fac6c5570f1e5f73e73b5379633bd0caf9f