Analysis

  • max time kernel
    149s
  • 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
    31-01-2023 11:22

General

  • Target

    vbc.exe

  • Size

    7KB

  • MD5

    7d7dd8874b96e698387e8929c53b85d2

  • SHA1

    4afcddebd884a0bb9885b62d05f728ec3c1e4825

  • SHA256

    ec24a8f92b77c77c267c785d00a9bab58a37331d1b1a20986b5c9266ff745f93

  • SHA512

    fe3977420e2179981c4155044ec044eb760d7e577ac53811d2c32166a573d2373c31ff57e969d522df80f512499d8752627067932cdea13372cd7873058129dd

  • SSDEEP

    96:OUY5awuf2gTYJau5huDntYBeTt1Ji6kd/7xVRbFnU:OUiYoYmuDntY8nUHFDI

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

top.thekillforabuse1.xyz:1068

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    remcos.exe

  • copy_folder

    Remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    false

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-R762FE

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    Remcos

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Extracted

Family

purecrypter

C2

https://onedrive.live.com/download?cid=A113DD34A0D77810&resid=A113DD34A0D77810%21124&authkey=AK1A3Rk0CMrac7g

Signatures

  • PureCrypter

    PureCrypter is a .NET malware loader first seen in early 2021.

  • Remcos

    Remcos is a closed-source remote control and surveillance software.

  • NirSoft MailPassView 1 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 2 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 4 IoCs
  • Executes dropped EXE 2 IoCs
  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Uses the VBS compiler for execution 1 TTPs
  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 5 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious behavior: MapViewOfSection 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 47 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\vbc.exe
    "C:\Users\Admin\AppData\Local\Temp\vbc.exe"
    1⤵
    • Checks computer location settings
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3720
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1444
    • C:\Users\Admin\AppData\Local\Temp\vbc.exe
      C:\Users\Admin\AppData\Local\Temp\vbc.exe
      2⤵
      • Checks computer location settings
      • Suspicious use of SetThreadContext
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of WriteProcessMemory
      PID:2100
      • C:\Users\Admin\AppData\Local\Temp\dwn.exe
        "C:\Users\Admin\AppData\Local\Temp\dwn.exe"
        3⤵
        • Executes dropped EXE
        • Checks computer location settings
        • Suspicious use of SetThreadContext
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1344
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:3240
        • C:\Users\Admin\AppData\Local\Temp\dwn.exe
          C:\Users\Admin\AppData\Local\Temp\dwn.exe
          4⤵
          • Executes dropped EXE
          • Accesses Microsoft Outlook profiles
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          • outlook_office_path
          • outlook_win_path
          PID:1828
      • C:\Users\Admin\AppData\Local\Temp\vbc.exe
        C:\Users\Admin\AppData\Local\Temp\vbc.exe /stext "C:\Users\Admin\AppData\Local\Temp\dbgvebwusyczfv"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        PID:3460
      • C:\Users\Admin\AppData\Local\Temp\vbc.exe
        C:\Users\Admin\AppData\Local\Temp\vbc.exe /stext "C:\Users\Admin\AppData\Local\Temp\nvmgflooggumpbumyy"
        3⤵
          PID:1700
        • C:\Users\Admin\AppData\Local\Temp\vbc.exe
          C:\Users\Admin\AppData\Local\Temp\vbc.exe /stext "C:\Users\Admin\AppData\Local\Temp\nvmgflooggumpbumyy"
          3⤵
            PID:4440
          • C:\Users\Admin\AppData\Local\Temp\vbc.exe
            C:\Users\Admin\AppData\Local\Temp\vbc.exe /stext "C:\Users\Admin\AppData\Local\Temp\nvmgflooggumpbumyy"
            3⤵
            • Accesses Microsoft Outlook accounts
            PID:3064
          • C:\Users\Admin\AppData\Local\Temp\vbc.exe
            C:\Users\Admin\AppData\Local\Temp\vbc.exe /stext "C:\Users\Admin\AppData\Local\Temp\qxrygdzpuomrrqiqqbqyz"
            3⤵
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:2396

      Network

      MITRE ATT&CK Matrix ATT&CK v6

      Execution

      Scripting

      1
      T1064

      Persistence

      Registry Run Keys / Startup Folder

      1
      T1060

      Defense Evasion

      Scripting

      1
      T1064

      Modify Registry

      1
      T1112

      Credential Access

      Credentials in Files

      3
      T1081

      Discovery

      Query Registry

      1
      T1012

      System Information Discovery

      2
      T1082

      Collection

      Data from Local System

      3
      T1005

      Email Collection

      2
      T1114

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\dwn.exe.log
        Filesize

        1KB

        MD5

        3a9188331a78f1dbce606db64b841fcb

        SHA1

        8e2c99b7c477d06591a856a4ea3e1e214719eee8

        SHA256

        db4137e258a0f6159fda559a5f6dd2704be0582c3f0586f65040c7ad1eb68451

        SHA512

        d1a994610a045d89d5d306866c24ae56bf16555414b8f63f632552568e67b5586f26d5a17a1f0a55ada376730298e6d856e9161828d4eae9decfa4e015e0e90a

      • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log
        Filesize

        1KB

        MD5

        4280e36a29fa31c01e4d8b2ba726a0d8

        SHA1

        c485c2c9ce0a99747b18d899b71dfa9a64dabe32

        SHA256

        e2486a1bdcba80dad6dd6210d7374bd70ae196a523c06ceda71370fd3ea78359

        SHA512

        494fe5f0ade03669e5830bed93c964d69b86629440148d7b0881cf53203fd89443ebff9b4d1ee9d96244f62af6edede622d9eacba37f80f389a0d522e4ad4ea4

      • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\ModuleAnalysisCache
        Filesize

        53KB

        MD5

        06ad34f9739c5159b4d92d702545bd49

        SHA1

        9152a0d4f153f3f40f7e606be75f81b582ee0c17

        SHA256

        474813b625f00710f29fa3b488235a6a22201851efb336bddf60d7d24a66bfba

        SHA512

        c272cd28ae164d465b779163ba9eca6a28261376414c6bbdfbd9f2128adb7f7ff1420e536b4d6000d0301ded2ec9036bc5c657588458bff41f176bdce8d74f92

      • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
        Filesize

        16KB

        MD5

        af56103df1bd81ff37d60206b59a9c9c

        SHA1

        9c133e68708056f9f2d67a584e0121d2bceeae6e

        SHA256

        2dc01a60a159e5a300545944d686bbd73da718678177bc17ff4c222383319cfb

        SHA512

        64b0728bb954964769676a3f1877697870d88eaa768df0b67d0e6840bcc3e253a3e0e5fd51eb18418ca112364714275d11dd6c1e07a8aac2f3795dd7cffb5827

      • C:\Users\Admin\AppData\Local\Temp\dbgvebwusyczfv
        Filesize

        4KB

        MD5

        952a930b9fe70f809a67cb4e765c9448

        SHA1

        7e6c235246cc1be14d8a01ee7688a2a2471d44c9

        SHA256

        bd8156713974af3003c418302d3647fa84f62836fe83613c05e8bc40cb06a867

        SHA512

        10d12f2412fd2cb9ecf47cccd0261b17d9a3323957602c06795c4b2244306837d0a979ec6e552dc023ee81719ebcb9455bdb6f9d44f07788664994d1498452fb

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

        6KB

        MD5

        4d3fb96fc012cd2043de73345f140c7a

        SHA1

        a8c512c96302974e4d296e39dbf485539fbd4ddb

        SHA256

        cc53ea5b29b637e48a4e35521fe5d2b638c588e400876c87059a9e582884e3bc

        SHA512

        c58d9c7aa2487bc54add4fb696c44f517d0b8beaaee4810db28e1a46bbad3d1295f6a7c6301bf16abcb8917886c4bf2a4b16c96f27eb96e1fa5256556cc55a2b

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

        6KB

        MD5

        4d3fb96fc012cd2043de73345f140c7a

        SHA1

        a8c512c96302974e4d296e39dbf485539fbd4ddb

        SHA256

        cc53ea5b29b637e48a4e35521fe5d2b638c588e400876c87059a9e582884e3bc

        SHA512

        c58d9c7aa2487bc54add4fb696c44f517d0b8beaaee4810db28e1a46bbad3d1295f6a7c6301bf16abcb8917886c4bf2a4b16c96f27eb96e1fa5256556cc55a2b

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

        6KB

        MD5

        4d3fb96fc012cd2043de73345f140c7a

        SHA1

        a8c512c96302974e4d296e39dbf485539fbd4ddb

        SHA256

        cc53ea5b29b637e48a4e35521fe5d2b638c588e400876c87059a9e582884e3bc

        SHA512

        c58d9c7aa2487bc54add4fb696c44f517d0b8beaaee4810db28e1a46bbad3d1295f6a7c6301bf16abcb8917886c4bf2a4b16c96f27eb96e1fa5256556cc55a2b

      • memory/1344-147-0x0000000000000000-mapping.dmp
      • memory/1344-151-0x0000000000E90000-0x0000000000E98000-memory.dmp
        Filesize

        32KB

      • memory/1444-138-0x0000000005B70000-0x0000000005BD6000-memory.dmp
        Filesize

        408KB

      • memory/1444-139-0x00000000061D0000-0x00000000061EE000-memory.dmp
        Filesize

        120KB

      • memory/1444-134-0x0000000000000000-mapping.dmp
      • memory/1444-135-0x0000000002C00000-0x0000000002C36000-memory.dmp
        Filesize

        216KB

      • memory/1444-136-0x0000000005540000-0x0000000005B68000-memory.dmp
        Filesize

        6.2MB

      • memory/1444-141-0x00000000066C0000-0x00000000066DA000-memory.dmp
        Filesize

        104KB

      • memory/1444-140-0x0000000007A30000-0x00000000080AA000-memory.dmp
        Filesize

        6.5MB

      • memory/1444-137-0x0000000005420000-0x0000000005486000-memory.dmp
        Filesize

        408KB

      • memory/1700-149-0x0000000000000000-mapping.dmp
      • memory/1828-174-0x0000000000400000-0x0000000000430000-memory.dmp
        Filesize

        192KB

      • memory/1828-179-0x0000000006660000-0x000000000666A000-memory.dmp
        Filesize

        40KB

      • memory/1828-180-0x0000000006A00000-0x0000000006A50000-memory.dmp
        Filesize

        320KB

      • memory/1828-173-0x0000000000000000-mapping.dmp
      • memory/1828-177-0x0000000005AD0000-0x0000000006074000-memory.dmp
        Filesize

        5.6MB

      • memory/1828-178-0x0000000006670000-0x0000000006702000-memory.dmp
        Filesize

        584KB

      • memory/1828-181-0x0000000006D50000-0x0000000006F12000-memory.dmp
        Filesize

        1.8MB

      • memory/2100-144-0x0000000000400000-0x000000000047F000-memory.dmp
        Filesize

        508KB

      • memory/2100-171-0x0000000000400000-0x000000000047F000-memory.dmp
        Filesize

        508KB

      • memory/2100-165-0x0000000010000000-0x0000000010019000-memory.dmp
        Filesize

        100KB

      • memory/2100-164-0x0000000010000000-0x0000000010019000-memory.dmp
        Filesize

        100KB

      • memory/2100-166-0x0000000010000000-0x0000000010019000-memory.dmp
        Filesize

        100KB

      • memory/2100-161-0x0000000010000000-0x0000000010019000-memory.dmp
        Filesize

        100KB

      • memory/2100-142-0x0000000000000000-mapping.dmp
      • memory/2100-143-0x0000000000400000-0x000000000047F000-memory.dmp
        Filesize

        508KB

      • memory/2100-145-0x0000000000400000-0x000000000047F000-memory.dmp
        Filesize

        508KB

      • memory/2100-155-0x0000000000400000-0x000000000047F000-memory.dmp
        Filesize

        508KB

      • memory/2100-172-0x0000000010000000-0x0000000010019000-memory.dmp
        Filesize

        100KB

      • memory/2396-154-0x0000000000000000-mapping.dmp
      • memory/2396-158-0x0000000000400000-0x0000000000424000-memory.dmp
        Filesize

        144KB

      • memory/3064-153-0x0000000000000000-mapping.dmp
      • memory/3064-156-0x0000000000400000-0x0000000000457000-memory.dmp
        Filesize

        348KB

      • memory/3240-167-0x0000000000000000-mapping.dmp
      • memory/3460-157-0x0000000000400000-0x0000000000478000-memory.dmp
        Filesize

        480KB

      • memory/3460-146-0x0000000000000000-mapping.dmp
      • memory/3460-159-0x0000000000400000-0x0000000000478000-memory.dmp
        Filesize

        480KB

      • memory/3720-132-0x0000000000EA0000-0x0000000000EA8000-memory.dmp
        Filesize

        32KB

      • memory/3720-133-0x00000000081C0000-0x00000000081E2000-memory.dmp
        Filesize

        136KB

      • memory/4440-152-0x0000000000000000-mapping.dmp