Analysis

  • max time kernel
    97s
  • max time network
    97s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    18-04-2022 16:37

General

  • Target

    1b249c58ecd6142ceb97e78122ed1bd77d768d5be2ca58138bf0c6ce4c946700.exe

  • Size

    2.3MB

  • MD5

    ae91c9d85c89ea2ec6bca35dac6262a1

  • SHA1

    57a5e54e8c321b2bd55d0cf77bf2a8097710a6c6

  • SHA256

    1b249c58ecd6142ceb97e78122ed1bd77d768d5be2ca58138bf0c6ce4c946700

  • SHA512

    2a784c727de7df1f2de42f1b9a7eaeb993437714568aaa75e078fa7e7b87feefeb8a6af858b188ca550330af9d89d79c83c0485c311fa2ebca395d0e6ca1b454

Malware Config

Signatures

  • MassLogger

    Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.

  • MassLogger Main Payload 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Loads dropped DLL 1 IoCs
  • 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 35 IoCs
  • Looks up external IP address via web service 2 IoCs

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

  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 14 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1b249c58ecd6142ceb97e78122ed1bd77d768d5be2ca58138bf0c6ce4c946700.exe
    "C:\Users\Admin\AppData\Local\Temp\1b249c58ecd6142ceb97e78122ed1bd77d768d5be2ca58138bf0c6ce4c946700.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:756
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\1b249c58ecd6142ceb97e78122ed1bd77d768d5be2ca58138bf0c6ce4c946700.exe'
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1464
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn nslookup.exe /tr '"C:\Users\Admin\AppData\Roaming\vilan\nslookup.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1944
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn nslookup.exe /tr '"C:\Users\Admin\AppData\Roaming\vilan\nslookup.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:852
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpF7C8.tmp.bat""
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:1440
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:516
      • C:\Users\Admin\AppData\Roaming\vilan\nslookup.exe
        "C:\Users\Admin\AppData\Roaming\vilan\nslookup.exe"
        3⤵
        • Executes dropped EXE
        • Checks computer location settings
        • Accesses Microsoft Outlook profiles
        • Suspicious behavior: AddClipboardFormatListener
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        • outlook_office_path
        • outlook_win_path
        PID:1908
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "powershell" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\vilan\nslookup.exe'
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:988

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmpF7C8.tmp.bat

    Filesize

    158B

    MD5

    6bb2921c1d6e69e40eb9e64cd8659365

    SHA1

    ba69a742016f3b82782160a7000a9fc4f0899901

    SHA256

    59ce11eeefc581311ac33d0d6a3f4320db7f8cf18655bf5e4ddfd98dd1408579

    SHA512

    c2385f54c52a0cbff0e154e6a4d7a8cd02c5fc69e191e3a6b78dbf3d67f83883e49d990fb69fb7d305f684ca31cbcfe4e89daa9aeaab559cd418e6f237cac2c1

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

    Filesize

    7KB

    MD5

    5743e3c07156f6ba224895454e38e820

    SHA1

    2c19bb93c0724953fc2bd02357ae409522f7165d

    SHA256

    d54498f9d6cea40fee99830a51b6f8160b441f5f7f3541e2f5840464bf23f3a6

    SHA512

    a2f4f2c12d43ac317c4244984a6fcc6308645c3e827271241a7e6e4eea79a4c3c2bd2141ee1b69823e21df3f5db96380c9f56bbb8833972dbbe7c226f21aad21

  • C:\Users\Admin\AppData\Roaming\vilan\nslookup.exe

    Filesize

    2.3MB

    MD5

    ae91c9d85c89ea2ec6bca35dac6262a1

    SHA1

    57a5e54e8c321b2bd55d0cf77bf2a8097710a6c6

    SHA256

    1b249c58ecd6142ceb97e78122ed1bd77d768d5be2ca58138bf0c6ce4c946700

    SHA512

    2a784c727de7df1f2de42f1b9a7eaeb993437714568aaa75e078fa7e7b87feefeb8a6af858b188ca550330af9d89d79c83c0485c311fa2ebca395d0e6ca1b454

  • C:\Users\Admin\AppData\Roaming\vilan\nslookup.exe

    Filesize

    2.3MB

    MD5

    ae91c9d85c89ea2ec6bca35dac6262a1

    SHA1

    57a5e54e8c321b2bd55d0cf77bf2a8097710a6c6

    SHA256

    1b249c58ecd6142ceb97e78122ed1bd77d768d5be2ca58138bf0c6ce4c946700

    SHA512

    2a784c727de7df1f2de42f1b9a7eaeb993437714568aaa75e078fa7e7b87feefeb8a6af858b188ca550330af9d89d79c83c0485c311fa2ebca395d0e6ca1b454

  • \Users\Admin\AppData\Roaming\vilan\nslookup.exe

    Filesize

    2.3MB

    MD5

    ae91c9d85c89ea2ec6bca35dac6262a1

    SHA1

    57a5e54e8c321b2bd55d0cf77bf2a8097710a6c6

    SHA256

    1b249c58ecd6142ceb97e78122ed1bd77d768d5be2ca58138bf0c6ce4c946700

    SHA512

    2a784c727de7df1f2de42f1b9a7eaeb993437714568aaa75e078fa7e7b87feefeb8a6af858b188ca550330af9d89d79c83c0485c311fa2ebca395d0e6ca1b454

  • memory/516-64-0x0000000000000000-mapping.dmp

  • memory/756-65-0x0000000004D85000-0x0000000004D96000-memory.dmp

    Filesize

    68KB

  • memory/756-57-0x00000000051E0000-0x0000000005266000-memory.dmp

    Filesize

    536KB

  • memory/756-56-0x0000000000A70000-0x0000000000AD8000-memory.dmp

    Filesize

    416KB

  • memory/756-54-0x0000000000EC0000-0x0000000001112000-memory.dmp

    Filesize

    2.3MB

  • memory/756-55-0x00000000755B1000-0x00000000755B3000-memory.dmp

    Filesize

    8KB

  • memory/852-62-0x0000000000000000-mapping.dmp

  • memory/988-77-0x000000006EC10000-0x000000006F1BB000-memory.dmp

    Filesize

    5.7MB

  • memory/988-74-0x0000000000000000-mapping.dmp

  • memory/1440-61-0x0000000000000000-mapping.dmp

  • memory/1464-58-0x0000000000000000-mapping.dmp

  • memory/1464-66-0x0000000074520000-0x0000000074ACB000-memory.dmp

    Filesize

    5.7MB

  • memory/1908-69-0x0000000000000000-mapping.dmp

  • memory/1908-73-0x00000000058C0000-0x0000000005946000-memory.dmp

    Filesize

    536KB

  • memory/1908-71-0x0000000000230000-0x0000000000482000-memory.dmp

    Filesize

    2.3MB

  • memory/1908-78-0x0000000004D75000-0x0000000004D86000-memory.dmp

    Filesize

    68KB

  • memory/1944-60-0x0000000000000000-mapping.dmp