Resubmissions

06/01/2023, 04:36

230106-e8dgtaec4610

06/01/2023, 04:17

230106-ewqxdaeb9710

Analysis

  • max time kernel
    600s
  • max time network
    399s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    06/01/2023, 04:36

General

  • Target
    wj.exe
  • Size 131KB
  • Sample230106-e8dgtaec46
  • SHA256 c82ab145610c19c3f5a1462196b41347c9786f5e600bdaa477bb98814461d279
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10

Malware Config

Signatures

  • Process spawned unexpected child process 1 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • Suspicious use of NtCreateUserProcessOtherParentProcess 1 IoCs
  • Loads dropped DLL 4 IoCs
  • Unexpected DNS network traffic destination 1 IoCs

    Network traffic to other servers than the configured DNS servers was detected on the DNS port.

  • 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 13 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Modifies data under HKEY_USERS 64 IoCs
  • Modifies registry class 22 IoCs
  • Script User-Agent 1 IoCs

    Uses user-agent string associated with script host/environment.

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 38 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs

Processes

  • C:\Windows\system32\services.exe
    C:\Windows\system32\services.exe
    1⤵
      PID:460
      • C:\Windows\system32\svchost.exe
        C:\Windows\system32\svchost.exe -k netsvcs
        2⤵
        • Suspicious use of NtCreateUserProcessOtherParentProcess
        • Suspicious use of SetThreadContext
        • Modifies registry class
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:864
      • C:\Windows\system32\svchost.exe
        C:\Windows\system32\svchost.exe -k WspService
        2⤵
        • Drops file in System32 directory
        • Checks processor information in registry
        • Modifies data under HKEY_USERS
        • Modifies registry class
        • Suspicious behavior: GetForegroundWindowSpam
        PID:1992
    • C:\Users\Admin\AppData\Local\Temp\wj.exe
      "C:\Users\Admin\AppData\Local\Temp\wj.exe"
      1⤵
      • Suspicious use of WriteProcessMemory
      PID:1464
      • C:\Users\Admin\AppData\Local\Temp\wj.exe
        "C:\Users\Admin\AppData\Local\Temp\wj.exe" -h
        2⤵
          PID:1072
      • C:\Windows\system32\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\db.dll",open
        1⤵
        • Process spawned unexpected child process
        • Suspicious use of WriteProcessMemory
        PID:1400
        • C:\Windows\SysWOW64\rundll32.exe
          rundll32.exe "C:\Users\Admin\AppData\Local\Temp\db.dll",open
          2⤵
          • Loads dropped DLL
          • Modifies registry class
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1352

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

            db.dat

            • Path C:\Users\Admin\AppData\Local\Temp\db.dat
            • Size 557KB
            • SHA256 b7cb464cd0c61026ec38d89c0a041393bc9369e217303677551eec65a09d2628
            • MD5 SHA1 SHA512 SSDEEP

            db.dll

            • Path C:\Users\Admin\AppData\Local\Temp\db.dll
            • Size 52KB
            • SHA256 ec01d244074f45d4f698f5713147e99d76053824a648b306e1debf69f3ba9ce6
            • MD5 SHA1 SHA512 SSDEEP

            db.dll

            • Path \Users\Admin\AppData\Local\Temp\db.dll
            • Size 52KB
            • SHA256 ec01d244074f45d4f698f5713147e99d76053824a648b306e1debf69f3ba9ce6
            • MD5 SHA1 SHA512 SSDEEP

            db.dll

            • Path \Users\Admin\AppData\Local\Temp\db.dll
            • Size 52KB
            • SHA256 ec01d244074f45d4f698f5713147e99d76053824a648b306e1debf69f3ba9ce6
            • MD5 SHA1 SHA512 SSDEEP

            db.dll

            • Path \Users\Admin\AppData\Local\Temp\db.dll
            • Size 52KB
            • SHA256 ec01d244074f45d4f698f5713147e99d76053824a648b306e1debf69f3ba9ce6
            • MD5 SHA1 SHA512 SSDEEP

            db.dll

            • Path \Users\Admin\AppData\Local\Temp\db.dll
            • Size 52KB
            • SHA256 ec01d244074f45d4f698f5713147e99d76053824a648b306e1debf69f3ba9ce6
            • MD5 SHA1 SHA512 SSDEEP

            memory/864-69-0x0000000000A30000-0x0000000000A7D000-memory.dmp

            memory/864-78-0x0000000000A30000-0x0000000000A7D000-memory.dmp

            memory/864-70-0x0000000001100000-0x0000000001172000-memory.dmp

            memory/1352-68-0x0000000000760000-0x00000000007BE000-memory.dmp

            memory/1352-67-0x0000000000A50000-0x0000000000B51000-memory.dmp

            memory/1464-54-0x0000000076581000-0x0000000076583000-memory.dmp

            memory/1992-64-0x0000000000060000-0x00000000000AD000-memory.dmp

            memory/1992-71-0x0000000000060000-0x00000000000AD000-memory.dmp

            memory/1992-72-0x00000000004E0000-0x0000000000552000-memory.dmp

            memory/1992-79-0x00000000004E0000-0x0000000000552000-memory.dmp

            memory/1992-80-0x000007FEFC251000-0x000007FEFC253000-memory.dmp

            memory/1992-81-0x0000000000380000-0x000000000039B000-memory.dmp

            memory/1992-82-0x0000000002870000-0x000000000297A000-memory.dmp

            memory/1992-83-0x00000000003A0000-0x00000000003C0000-memory.dmp

            memory/1992-84-0x00000000003C0000-0x00000000003DB000-memory.dmp

            memory/1992-85-0x0000000002870000-0x000000000297A000-memory.dmp