Resubmissions

04-10-2024 15:30

241004-sxz4bswcpb 10

03-10-2024 11:26

241003-nj6lqsxcpm 10

Analysis

  • max time kernel
    102s
  • max time network
    106s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    03-10-2024 11:26

General

  • Target

    encrypted.exe

  • Size

    2.8MB

  • MD5

    f01725be4af17d500bf5121780b3d304

  • SHA1

    4ba42ced4db6a5173ece265424b26b32ececbbd6

  • SHA256

    a6d95538d1d2f4031e10ff3a1258400a3f471fe64e14ff2dc9808c28334d0cea

  • SHA512

    68d39578c162f03c64617b82d8c242afb8278fa31476e116a29c83138fc804d75aefffe7e956ba8ffe6d5b2253f83d704212a166df1dc57e58b502fcdfdbed26

  • SSDEEP

    24576:Hp+4uTV+nMmbk1UU/ERo0trw2rIxNFsT8SYnt23pDoFL5I1MnU0jaShPkmZLirW7:HpCTVtsRo0NwggzLjUaPIWzea

Malware Config

Extracted

Family

vipkeylogger

Signatures

  • VIPKeylogger

    VIPKeylogger is a keylogger and infostealer written in C# and it resembles SnakeKeylogger that was found in 2020.

  • 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 3 TTPs

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

  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Looks up external IP address via web service 1 IoCs

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

  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\encrypted.exe
    "C:\Users\Admin\AppData\Local\Temp\encrypted.exe"
    1⤵
    • Accesses Microsoft Outlook profiles
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • outlook_office_path
    • outlook_win_path
    PID:3064
  • C:\Windows\explorer.exe
    "C:\Windows\explorer.exe"
    1⤵
      PID:2656
    • C:\Program Files\7-Zip\7zG.exe
      "C:\Program Files\7-Zip\7zG.exe" x -o"C:\Users\Admin\AppData\Local\Temp\3711440261\zmstage.exe\" -spe -an -ai#7zMap24679:126:7zEvent25022
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      PID:2060
    • C:\Windows\system32\rundll32.exe
      "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\3711440261\zmstage.exe.orig
      1⤵
      • Modifies registry class
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of WriteProcessMemory
      PID:1512
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Local\Temp\3711440261\zmstage.exe.orig
        2⤵
        • Opens file in notepad (likely ransom note)
        PID:2356
    • C:\Users\Admin\AppData\Local\Temp\3711440261\zmsta.exe
      "C:\Users\Admin\AppData\Local\Temp\3711440261\zmsta.exe"
      1⤵
        PID:2992
      • C:\Users\Admin\AppData\Local\Temp\3711440261\zmsta.exe
        "C:\Users\Admin\AppData\Local\Temp\3711440261\zmsta.exe"
        1⤵
          PID:932

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • memory/3064-0-0x0000000000100000-0x000000000014C000-memory.dmp

          Filesize

          304KB

        • memory/3064-1-0x000007FEF4F43000-0x000007FEF4F44000-memory.dmp

          Filesize

          4KB

        • memory/3064-2-0x000000001B080000-0x000000001B0CA000-memory.dmp

          Filesize

          296KB

        • memory/3064-3-0x000007FEF4F40000-0x000007FEF592C000-memory.dmp

          Filesize

          9.9MB

        • memory/3064-4-0x000007FEF4F40000-0x000007FEF592C000-memory.dmp

          Filesize

          9.9MB

        • memory/3064-5-0x000007FEF4F40000-0x000007FEF592C000-memory.dmp

          Filesize

          9.9MB

        • memory/3064-6-0x000007FEF4F43000-0x000007FEF4F44000-memory.dmp

          Filesize

          4KB

        • memory/3064-7-0x000007FEF4F40000-0x000007FEF592C000-memory.dmp

          Filesize

          9.9MB

        • memory/3064-8-0x000007FEF4F40000-0x000007FEF592C000-memory.dmp

          Filesize

          9.9MB

        • memory/3064-9-0x000007FEF4F40000-0x000007FEF592C000-memory.dmp

          Filesize

          9.9MB