Overview

overview

10

Static

static

file.exe

windows7-x64

10

file.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/10/2022, 09:36

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General

  • Target

    file.exe

  • Size

    269KB

  • MD5

    be1bbd82c143cf96734a3c1010b9495e

  • SHA1

    0769aa55ffe144d8edb858681d9cee5182417139

  • SHA256

    9704c25a699d37f70abbfa396b8f2c8a94432326dc4ef4dd0e92a0d28e19fe59

  • SHA512

    18cf7599431fb3d504b3289d482b48d195a70d07b7fa46b54a1c89c4afdf9cb25bae1b5c30853ac6715151b0f96a89c5bcad529e4319b049a2e4737ace803c7f

  • SSDEEP

    3072:XXiog49mT08mTKgFv72XeRU7tsCPmsco0EqrX7zP0r/cf7iaTzwh0KK:HLg4S9evSH1nsEqrHP0r/oiaTMh0r

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:2176
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ezijwsxr\
      2⤵
        PID:4656
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\kwftsoxc.exe" C:\Windows\SysWOW64\ezijwsxr\
        2⤵
          PID:1220
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ezijwsxr binPath= "C:\Windows\SysWOW64\ezijwsxr\kwftsoxc.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1128
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ezijwsxr "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:3480
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ezijwsxr
          2⤵
          • Launches sc.exe
          PID:4892
        • 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:2324
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2176 -s 1044
          2⤵
          • Program crash
          PID:3580
      • C:\Windows\SysWOW64\ezijwsxr\kwftsoxc.exe
        C:\Windows\SysWOW64\ezijwsxr\kwftsoxc.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4044
        • 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:2372
          • 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:3848
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4044 -s 540
          2⤵
          • Program crash
          PID:4060
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 2176 -ip 2176
        1⤵
          PID:2748
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 4044 -ip 4044
          1⤵
            PID:4148

          Network

          MITRE ATT&CK Enterprise v6

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          Downloads

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

            10.9MB

            MD5

            32e683e6d6df4a3972c1b54ae07761c1

            SHA1

            5410cb9233e23b92c86527b35ed42998a1dff022

            SHA256

            ccda745991eba0b8f3df82ca11f2849f645addc9145cd447c6a572131d5df443

            SHA512

            9766f69c895874048970c9882cb3f91aed5ade3453ef34c13ab73aff72a36cd22ebfbfd52ceb5477b7f1b95b39578f9073f6f748fa5cba1c808c2a595c0f4ef7

            Download Submit

          • C:\Windows\SysWOW64\ezijwsxr\kwftsoxc.exe
            Filesize

            10.9MB

            MD5

            32e683e6d6df4a3972c1b54ae07761c1

            SHA1

            5410cb9233e23b92c86527b35ed42998a1dff022

            SHA256

            ccda745991eba0b8f3df82ca11f2849f645addc9145cd447c6a572131d5df443

            SHA512

            9766f69c895874048970c9882cb3f91aed5ade3453ef34c13ab73aff72a36cd22ebfbfd52ceb5477b7f1b95b39578f9073f6f748fa5cba1c808c2a595c0f4ef7

            Download Submit

          • memory/2176-133-0x0000000002FA3000-0x0000000002FB9000-memory.dmp

            Filesize

            88KB

            Download

          • memory/2176-134-0x0000000002D90000-0x0000000002DA3000-memory.dmp

            Filesize

            76KB

            Download

          • memory/2176-137-0x0000000000400000-0x0000000002C31000-memory.dmp

            Filesize

            40.2MB

            Download

          • memory/2176-144-0x0000000000400000-0x0000000002C31000-memory.dmp

            Filesize

            40.2MB

            Download

          • memory/2176-143-0x0000000002FA3000-0x0000000002FB9000-memory.dmp

            Filesize

            88KB

            Download

          • memory/2372-159-0x0000000001D70000-0x0000000001D80000-memory.dmp

            Filesize

            64KB

            Download

          • memory/2372-165-0x0000000007580000-0x000000000798B000-memory.dmp

            Filesize

            4.0MB

            Download

          • memory/2372-168-0x0000000002BE0000-0x0000000002BE7000-memory.dmp

            Filesize

            28KB

            Download

          • memory/2372-146-0x00000000007E0000-0x00000000007F5000-memory.dmp

            Filesize

            84KB

            Download

          • memory/2372-162-0x0000000002BD0000-0x0000000002BD5000-memory.dmp

            Filesize

            20KB

            Download

          • memory/2372-150-0x00000000007E0000-0x00000000007F5000-memory.dmp

            Filesize

            84KB

            Download

          • memory/2372-156-0x0000000001D60000-0x0000000001D66000-memory.dmp

            Filesize

            24KB

            Download

          • memory/2372-152-0x00000000007E0000-0x00000000007F5000-memory.dmp

            Filesize

            84KB

            Download

          • memory/2372-153-0x0000000002600000-0x000000000280F000-memory.dmp

            Filesize

            2.1MB

            Download

          • memory/3848-172-0x00000000004F0000-0x00000000005E1000-memory.dmp

            Filesize

            964KB

            Download

          • memory/3848-177-0x00000000004F0000-0x00000000005E1000-memory.dmp

            Filesize

            964KB

            Download

          • memory/4044-151-0x0000000000400000-0x0000000002C31000-memory.dmp

            Filesize

            40.2MB

            Download

          • memory/4044-149-0x0000000002DCE000-0x0000000002DE3000-memory.dmp

            Filesize

            84KB

            Download