Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    01-05-2023 11:36

General

  • Target

    file.exe

  • Size

    351KB

  • MD5

    9f95df4831aaa8dc6bd0cd4584f59e9b

  • SHA1

    14db8de87695de3074043932e8479e18ac2dd5d3

  • SHA256

    8e7b46b880092192df1a09ea0fd5878b17d1ba9ae89c5de6d61d74d1dd3e35f6

  • SHA512

    e2473f43d1898f6560935a4411de525ebdec2780d3c43132ebfec6adaa4e4de43b2af4ad4542ee1c3cd910a30718b79b04aa52143ea03c7b1edb78d495f71aee

  • SSDEEP

    6144:r/eUB2wMyGWA1qom6IvMlU9kaXOOEbLQHl2QSzVhn25Y:r/hBVPGWA106bha+OKsRSL6Y

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:1236
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\uzplmshm\
      2⤵
        PID:2016
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ahorgunx.exe" C:\Windows\SysWOW64\uzplmshm\
        2⤵
          PID:2040
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create uzplmshm binPath= "C:\Windows\SysWOW64\uzplmshm\ahorgunx.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1572
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description uzplmshm "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:520
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start uzplmshm
          2⤵
          • Launches sc.exe
          PID:1716
        • 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:1440
      • C:\Windows\SysWOW64\uzplmshm\ahorgunx.exe
        C:\Windows\SysWOW64\uzplmshm\ahorgunx.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1696
        • 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:1384
          • 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:1072

      Network

      MITRE ATT&CK Matrix ATT&CK v6

      Persistence

      New Service

      1
      T1050

      Modify Existing Service

      1
      T1031

      Registry Run Keys / Startup Folder

      1
      T1060

      Privilege Escalation

      New Service

      1
      T1050

      Defense Evasion

      Disabling Security Tools

      1
      T1089

      Modify Registry

      2
      T1112

      Discovery

      System Information Discovery

      1
      T1082

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\ahorgunx.exe
        Filesize

        10.2MB

        MD5

        985fbce45d9e4a84ced3ea993e8f899d

        SHA1

        26ec4ae45ca11a9241792afa049eb4e7e8854f07

        SHA256

        5fe4d03eeea1ae04287f85f0e8d63db07d0757ecbe5f882ed65c7f7a24e1a75a

        SHA512

        9b59a2387dd09ed2be7c9767fdfb773156fe6ce6e094e886aecf0d7df8a0653fdc753b5b04be71fd7dd568f736ea6c94819e7d66a5176f2b9d801e85fb0eb6e5

      • C:\Windows\SysWOW64\uzplmshm\ahorgunx.exe
        Filesize

        10.2MB

        MD5

        985fbce45d9e4a84ced3ea993e8f899d

        SHA1

        26ec4ae45ca11a9241792afa049eb4e7e8854f07

        SHA256

        5fe4d03eeea1ae04287f85f0e8d63db07d0757ecbe5f882ed65c7f7a24e1a75a

        SHA512

        9b59a2387dd09ed2be7c9767fdfb773156fe6ce6e094e886aecf0d7df8a0653fdc753b5b04be71fd7dd568f736ea6c94819e7d66a5176f2b9d801e85fb0eb6e5

      • memory/1072-123-0x00000000000F0000-0x00000000001E1000-memory.dmp
        Filesize

        964KB

      • memory/1072-122-0x00000000000F0000-0x00000000001E1000-memory.dmp
        Filesize

        964KB

      • memory/1072-121-0x00000000000F0000-0x00000000001E1000-memory.dmp
        Filesize

        964KB

      • memory/1072-120-0x00000000000F0000-0x00000000001E1000-memory.dmp
        Filesize

        964KB

      • memory/1072-119-0x00000000000F0000-0x00000000001E1000-memory.dmp
        Filesize

        964KB

      • memory/1072-118-0x00000000000F0000-0x00000000001E1000-memory.dmp
        Filesize

        964KB

      • memory/1072-111-0x00000000000F0000-0x00000000001E1000-memory.dmp
        Filesize

        964KB

      • memory/1072-110-0x00000000000F0000-0x00000000001E1000-memory.dmp
        Filesize

        964KB

      • memory/1236-56-0x00000000002B0000-0x00000000002C3000-memory.dmp
        Filesize

        76KB

      • memory/1236-59-0x0000000000400000-0x00000000007FC000-memory.dmp
        Filesize

        4.0MB

      • memory/1384-88-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1384-95-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1384-78-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1384-81-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1384-82-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1384-83-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1384-84-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1384-85-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1384-86-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1384-87-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1384-74-0x0000000001A00000-0x0000000001C0F000-memory.dmp
        Filesize

        2.1MB

      • memory/1384-89-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1384-90-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1384-91-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1384-93-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1384-92-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1384-94-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1384-75-0x0000000000150000-0x0000000000156000-memory.dmp
        Filesize

        24KB

      • memory/1384-96-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1384-97-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1384-98-0x00000000001F0000-0x00000000001F5000-memory.dmp
        Filesize

        20KB

      • memory/1384-101-0x00000000001F0000-0x00000000001F5000-memory.dmp
        Filesize

        20KB

      • memory/1384-102-0x00000000053F0000-0x00000000057FB000-memory.dmp
        Filesize

        4.0MB

      • memory/1384-105-0x00000000053F0000-0x00000000057FB000-memory.dmp
        Filesize

        4.0MB

      • memory/1384-106-0x00000000002C0000-0x00000000002C7000-memory.dmp
        Filesize

        28KB

      • memory/1384-71-0x0000000001A00000-0x0000000001C0F000-memory.dmp
        Filesize

        2.1MB

      • memory/1384-69-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1384-68-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1384-67-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1384-124-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1384-63-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1384-61-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1384-62-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/1696-65-0x0000000000400000-0x00000000007FC000-memory.dmp
        Filesize

        4.0MB