Analysis

  • max time kernel
    142s
  • max time network
    146s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    16-12-2022 23:08

General

  • Target

    file.exe

  • Size

    214KB

  • MD5

    2ac1468184da62b79a042453ba886783

  • SHA1

    ff899e91ff35e73ad05bb321ce01a77e6f1f00a1

  • SHA256

    9c7812d825974b02bb6ed49097d75c7f9e82f67bbe35f595f6d3df23cff07d38

  • SHA512

    a92788df659ff40c0338ea062e478224902389fced7fde946ef70ae1770ef2c26c6aae4231ac41905935f249351fe122e93ac276c957b4e61fe38bd52bbcd838

  • SSDEEP

    3072:f2XcK/YLMAHSbRS00/InRJpBHRytfAJ0eTjJJfLszeAeHOu40zwUzQRKF+:ubYLMA100sgfcDXgzJju40M2b

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

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 2 IoCs
  • Creates new service(s) 1 TTPs
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Deletes itself 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). Likely ransomware behaviour.

  • 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:1292
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\nerzwelb\
      2⤵
        PID:1528
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ujxuntps.exe" C:\Windows\SysWOW64\nerzwelb\
        2⤵
          PID:1176
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create nerzwelb binPath= "C:\Windows\SysWOW64\nerzwelb\ujxuntps.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:376
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description nerzwelb "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1020
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start nerzwelb
          2⤵
          • Launches sc.exe
          PID:540
        • 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:1592
      • C:\Windows\SysWOW64\nerzwelb\ujxuntps.exe
        C:\Windows\SysWOW64\nerzwelb\ujxuntps.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:292
        • 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:1804
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.60000 -p x -k -a cn/half
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:588

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Temp\ujxuntps.exe

        Filesize

        13.0MB

        MD5

        f16d805e56160c325d4fea80aab2fb75

        SHA1

        f52bc4b80a1683f7b475ec1e72850e16f467e643

        SHA256

        2790e4a925d2949d8fbfc0a8fa816e8c1d782cebe5f0c79d0beec75428d2c1bc

        SHA512

        2ad1cd7f607831d0d594bd0987f0ff7327dcd4898d68de3ced4aad0c1a5c43d5cb15d0998e3b4108c1ce7aec64c3bc8bbbe88b980774cf9678e1253ce265118f

      • C:\Windows\SysWOW64\nerzwelb\ujxuntps.exe

        Filesize

        13.0MB

        MD5

        f16d805e56160c325d4fea80aab2fb75

        SHA1

        f52bc4b80a1683f7b475ec1e72850e16f467e643

        SHA256

        2790e4a925d2949d8fbfc0a8fa816e8c1d782cebe5f0c79d0beec75428d2c1bc

        SHA512

        2ad1cd7f607831d0d594bd0987f0ff7327dcd4898d68de3ced4aad0c1a5c43d5cb15d0998e3b4108c1ce7aec64c3bc8bbbe88b980774cf9678e1253ce265118f

      • memory/292-76-0x0000000000308000-0x0000000000319000-memory.dmp

        Filesize

        68KB

      • memory/292-78-0x0000000000400000-0x0000000000452000-memory.dmp

        Filesize

        328KB

      • memory/292-69-0x0000000000308000-0x0000000000319000-memory.dmp

        Filesize

        68KB

      • memory/588-103-0x0000000000130000-0x0000000000221000-memory.dmp

        Filesize

        964KB

      • memory/588-101-0x0000000000130000-0x0000000000221000-memory.dmp

        Filesize

        964KB

      • memory/1292-67-0x0000000000528000-0x0000000000539000-memory.dmp

        Filesize

        68KB

      • memory/1292-68-0x0000000000400000-0x0000000000452000-memory.dmp

        Filesize

        328KB

      • memory/1292-57-0x0000000000528000-0x0000000000539000-memory.dmp

        Filesize

        68KB

      • memory/1292-54-0x0000000000528000-0x0000000000539000-memory.dmp

        Filesize

        68KB

      • memory/1292-58-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/1292-59-0x0000000000400000-0x0000000000452000-memory.dmp

        Filesize

        328KB

      • memory/1292-55-0x0000000076381000-0x0000000076383000-memory.dmp

        Filesize

        8KB

      • memory/1804-72-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/1804-81-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/1804-82-0x0000000001920000-0x0000000001B2F000-memory.dmp

        Filesize

        2.1MB

      • memory/1804-85-0x00000000000E0000-0x00000000000E6000-memory.dmp

        Filesize

        24KB

      • memory/1804-88-0x00000000000F0000-0x0000000000100000-memory.dmp

        Filesize

        64KB

      • memory/1804-91-0x0000000000110000-0x0000000000115000-memory.dmp

        Filesize

        20KB

      • memory/1804-94-0x0000000005560000-0x000000000596B000-memory.dmp

        Filesize

        4.0MB

      • memory/1804-97-0x0000000000340000-0x0000000000347000-memory.dmp

        Filesize

        28KB

      • memory/1804-100-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/1804-80-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/1804-74-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB