Analysis

  • max time kernel
    149s
  • max time network
    151s
  • 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, 21:38

General

  • Target

    b8381733a0e0cc27a89b18e142ccc1eeb84d012dc381a5819e931fe8153fa1f2.exe

  • Size

    1.6MB

  • MD5

    f2cad6be8dedc7cbbc9b6ae90e0434af

  • SHA1

    0885905ddd6e69e10176e2ca5123f82c2d0570e8

  • SHA256

    b8381733a0e0cc27a89b18e142ccc1eeb84d012dc381a5819e931fe8153fa1f2

  • SHA512

    53bd29c6f13481b3a4b824defc014531154d0322e0a77a9907ca8b99be0587c62db2a191f70c1fbc2d8df6540ec8bd396a301aa96e2feb687f75916723878cfa

  • 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\b8381733a0e0cc27a89b18e142ccc1eeb84d012dc381a5819e931fe8153fa1f2.exe
    "C:\Users\Admin\AppData\Local\Temp\b8381733a0e0cc27a89b18e142ccc1eeb84d012dc381a5819e931fe8153fa1f2.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:4260
    • 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:2640
    • 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:2376
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4260 -s 1664
      2⤵
      • Program crash
      PID:4768
  • \??\c:\windows\system32\svchost.exe
    c:\windows\system32\svchost.exe -k localsystemnetworkrestricted -s fhsvc
    1⤵
      PID:4008
    • C:\Windows\system32\svchost.exe
      C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -s WPDBusEnum
      1⤵
        PID:2232

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            • C:\ProgramData\OfficeTrackerNMP131\OfficeTrackerNMP131.exe

              Filesize

              1.6MB

              MD5

              f2cad6be8dedc7cbbc9b6ae90e0434af

              SHA1

              0885905ddd6e69e10176e2ca5123f82c2d0570e8

              SHA256

              b8381733a0e0cc27a89b18e142ccc1eeb84d012dc381a5819e931fe8153fa1f2

              SHA512

              53bd29c6f13481b3a4b824defc014531154d0322e0a77a9907ca8b99be0587c62db2a191f70c1fbc2d8df6540ec8bd396a301aa96e2feb687f75916723878cfa

            • C:\Users\Admin\AppData\Local\Temp\grandUIACZnbeElwrl9_D\information.txt

              Filesize

              3KB

              MD5

              aeb9a06705f5aa2cbe8939564a22085e

              SHA1

              5d6539ee3039a9ce948e398c2c2306129ba53393

              SHA256

              d1873016928379fb514e444ec99bb7d496b46e63e7080f223b5003fc036d6d47

              SHA512

              123e583a53b5f4082c0657daf35bf32ab8415c014dba4607aaedb0be7e606161ef55530a600acb25001d1b327d9908a1d83acf22790223f9d521689f01f771c1

            • C:\Users\Admin\AppData\Local\Temp\posterBoxCZnbeElwrl9_D\QdX9ITDLyCRBWeb Data

              Filesize

              92KB

              MD5

              52c1c59f20f3b5384a8bced66c68e36d

              SHA1

              4cbc828116e54498871daccf4be75db441df0d9e

              SHA256

              38faf81c41c67d7edb345f0c380c9b1c56f76003f7fe4e3796aa5ac99c25e282

              SHA512

              aaaaad81d473693975461f88891c671d125b8b73807d87dbb158b6d0e6774e3cff5606d1692fc41906e3a29a84a55319163e424d528fc4605a518d6a3a677ec9