Analysis

  • max time kernel
    144s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    28-03-2023 02:18

General

  • Target

    8209beb6b60aadf651bb251bbd11d695092f01ff0577c7f7280b27ecd555b26b.exe

  • Size

    274KB

  • MD5

    bb56c80680e59414b05e9b99ac73e212

  • SHA1

    6c899c177242f54f5ace5d54e2a874a8e9366b56

  • SHA256

    8209beb6b60aadf651bb251bbd11d695092f01ff0577c7f7280b27ecd555b26b

  • SHA512

    e9f529f0fab9ea9f31e97a7337e6ffb4434795a6697164a1a819aabc136610e4e649942539fd3ed66d2c7556e9ca0f4cd12f16d45d9603774f2dad01d40b7158

  • SSDEEP

    3072:936aWhjzzu7BpaY8yuQiAbZ+sN3TcJqiwog2DGqnJYyyvs/zeFy/ULpNN4TJY:I3OBsY8XsywoDGCYbazh/eNN4T

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). Likely ransomware behaviour.

  • 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\8209beb6b60aadf651bb251bbd11d695092f01ff0577c7f7280b27ecd555b26b.exe
    "C:\Users\Admin\AppData\Local\Temp\8209beb6b60aadf651bb251bbd11d695092f01ff0577c7f7280b27ecd555b26b.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1720
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rkrooeaq\
      2⤵
        PID:948
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ixpwbzew.exe" C:\Windows\SysWOW64\rkrooeaq\
        2⤵
          PID:1320
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create rkrooeaq binPath= "C:\Windows\SysWOW64\rkrooeaq\ixpwbzew.exe /d\"C:\Users\Admin\AppData\Local\Temp\8209beb6b60aadf651bb251bbd11d695092f01ff0577c7f7280b27ecd555b26b.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:432
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description rkrooeaq "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1864
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start rkrooeaq
          2⤵
          • Launches sc.exe
          PID:1764
        • 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:664
      • C:\Windows\SysWOW64\rkrooeaq\ixpwbzew.exe
        C:\Windows\SysWOW64\rkrooeaq\ixpwbzew.exe /d"C:\Users\Admin\AppData\Local\Temp\8209beb6b60aadf651bb251bbd11d695092f01ff0577c7f7280b27ecd555b26b.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:800
        • 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:1684
          • 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:1496

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

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

        Filesize

        14.1MB

        MD5

        e24639af3361ce461d782c687684be65

        SHA1

        629ceca68c96b40bf65c42cecc13f15d3c4481ce

        SHA256

        a59cc5c91e9bbdcd76b8898db5b9f97b61e840b1a8f0b482f62ceb8765387b2c

        SHA512

        8887e80f89fc77e714c93a0079c47370f7a7467b196abb85fa104c068a6e453a9de94fa82b17acaab2ac4fc27adc1798b810ddea5e7c132ddd110ac09de26303

      • C:\Windows\SysWOW64\rkrooeaq\ixpwbzew.exe

        Filesize

        14.1MB

        MD5

        e24639af3361ce461d782c687684be65

        SHA1

        629ceca68c96b40bf65c42cecc13f15d3c4481ce

        SHA256

        a59cc5c91e9bbdcd76b8898db5b9f97b61e840b1a8f0b482f62ceb8765387b2c

        SHA512

        8887e80f89fc77e714c93a0079c47370f7a7467b196abb85fa104c068a6e453a9de94fa82b17acaab2ac4fc27adc1798b810ddea5e7c132ddd110ac09de26303

      • memory/800-65-0x0000000000400000-0x0000000002B72000-memory.dmp

        Filesize

        39.4MB

      • memory/1496-111-0x0000000000160000-0x0000000000251000-memory.dmp

        Filesize

        964KB

      • memory/1496-124-0x0000000000160000-0x0000000000251000-memory.dmp

        Filesize

        964KB

      • memory/1496-123-0x0000000000160000-0x0000000000251000-memory.dmp

        Filesize

        964KB

      • memory/1496-122-0x0000000000160000-0x0000000000251000-memory.dmp

        Filesize

        964KB

      • memory/1496-121-0x0000000000160000-0x0000000000251000-memory.dmp

        Filesize

        964KB

      • memory/1496-120-0x0000000000160000-0x0000000000251000-memory.dmp

        Filesize

        964KB

      • memory/1496-119-0x0000000000160000-0x0000000000251000-memory.dmp

        Filesize

        964KB

      • memory/1496-112-0x0000000000160000-0x0000000000251000-memory.dmp

        Filesize

        964KB

      • memory/1684-88-0x0000000000260000-0x0000000000270000-memory.dmp

        Filesize

        64KB

      • memory/1684-94-0x0000000000260000-0x0000000000270000-memory.dmp

        Filesize

        64KB

      • memory/1684-75-0x0000000000110000-0x0000000000116000-memory.dmp

        Filesize

        24KB

      • memory/1684-78-0x0000000000260000-0x0000000000270000-memory.dmp

        Filesize

        64KB

      • memory/1684-82-0x0000000000260000-0x0000000000270000-memory.dmp

        Filesize

        64KB

      • memory/1684-81-0x0000000000260000-0x0000000000270000-memory.dmp

        Filesize

        64KB

      • memory/1684-83-0x0000000000260000-0x0000000000270000-memory.dmp

        Filesize

        64KB

      • memory/1684-84-0x0000000000260000-0x0000000000270000-memory.dmp

        Filesize

        64KB

      • memory/1684-85-0x0000000000260000-0x0000000000270000-memory.dmp

        Filesize

        64KB

      • memory/1684-86-0x0000000000260000-0x0000000000270000-memory.dmp

        Filesize

        64KB

      • memory/1684-87-0x0000000000260000-0x0000000000270000-memory.dmp

        Filesize

        64KB

      • memory/1684-61-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1684-89-0x0000000000260000-0x0000000000270000-memory.dmp

        Filesize

        64KB

      • memory/1684-90-0x0000000000260000-0x0000000000270000-memory.dmp

        Filesize

        64KB

      • memory/1684-91-0x0000000000260000-0x0000000000270000-memory.dmp

        Filesize

        64KB

      • memory/1684-92-0x0000000000260000-0x0000000000270000-memory.dmp

        Filesize

        64KB

      • memory/1684-93-0x0000000000260000-0x0000000000270000-memory.dmp

        Filesize

        64KB

      • memory/1684-74-0x00000000018C0000-0x0000000001ACF000-memory.dmp

        Filesize

        2.1MB

      • memory/1684-95-0x0000000000260000-0x0000000000270000-memory.dmp

        Filesize

        64KB

      • memory/1684-96-0x0000000000260000-0x0000000000270000-memory.dmp

        Filesize

        64KB

      • memory/1684-97-0x0000000000260000-0x0000000000270000-memory.dmp

        Filesize

        64KB

      • memory/1684-98-0x0000000000270000-0x0000000000275000-memory.dmp

        Filesize

        20KB

      • memory/1684-101-0x0000000000270000-0x0000000000275000-memory.dmp

        Filesize

        20KB

      • memory/1684-102-0x00000000054C0000-0x00000000058CB000-memory.dmp

        Filesize

        4.0MB

      • memory/1684-104-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1684-106-0x00000000054C0000-0x00000000058CB000-memory.dmp

        Filesize

        4.0MB

      • memory/1684-107-0x00000000002B0000-0x00000000002B7000-memory.dmp

        Filesize

        28KB

      • memory/1684-71-0x00000000018C0000-0x0000000001ACF000-memory.dmp

        Filesize

        2.1MB

      • memory/1684-69-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1684-68-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1684-67-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1684-63-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1684-62-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/1720-56-0x00000000001B0000-0x00000000001C3000-memory.dmp

        Filesize

        76KB

      • memory/1720-60-0x0000000000400000-0x0000000002B72000-memory.dmp

        Filesize

        39.4MB