Analysis

  • max time kernel
    119s
  • max time network
    145s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220721-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220721-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24-07-2022 17:34

General

  • Target

    a4983faa6bc1743bd7607fc5f8204694e6852af052a2bb8db7af6e24fe71267a.exe

  • Size

    4.3MB

  • MD5

    c8659d50dd2e24fb509377114355aa36

  • SHA1

    0a3d5ba3e3cb94c89c2007c68ba11ba97674c67a

  • SHA256

    a4983faa6bc1743bd7607fc5f8204694e6852af052a2bb8db7af6e24fe71267a

  • SHA512

    3ff3d3aee31f76f3bee725740b803331439602b92791e6aea5f62dcf112689caab262f4a8d7bee45c0f70ff4ccc6d29a24802d8705e8032c17fd26a54a790d5a

Malware Config

Extracted

Family

vidar

Version

9.9

Botnet

231

C2

http://rapidbtcinvest.com/

Attributes
  • profile_id

    231

Signatures

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer HTTP POST Pattern

    suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer HTTP POST Pattern

  • Vidar Stealer 2 IoCs
  • Executes dropped EXE 4 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Reads local data of messenger clients 2 TTPs

    Infostealers often target stored data of messaging applications, which can include saved credentials and account information.

  • 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.

  • Accesses 2FA software files, possible credential harvesting 2 TTPs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • AutoIT Executable 3 IoCs

    AutoIT scripts compiled to PE executables.

  • Drops file in Program Files directory 5 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 2 IoCs
  • Checks processor information in registry 2 TTPs 4 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Creates scheduled task(s) 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a4983faa6bc1743bd7607fc5f8204694e6852af052a2bb8db7af6e24fe71267a.exe
    "C:\Users\Admin\AppData\Local\Temp\a4983faa6bc1743bd7607fc5f8204694e6852af052a2bb8db7af6e24fe71267a.exe"
    1⤵
    • Checks computer location settings
    • Drops file in Program Files directory
    • Suspicious use of WriteProcessMemory
    PID:4168
    • C:\Program Files (x86)\LetsSee!\busshost.exe
      "C:\Program Files (x86)\LetsSee!\busshost.exe"
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:4064
    • C:\Program Files (x86)\LetsSee!\YTLoader.exe
      "C:\Program Files (x86)\LetsSee!\YTLoader.exe"
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Enumerates system info in registry
      • Suspicious use of AdjustPrivilegeToken
      PID:688
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 688 -s 1608
        3⤵
        • Program crash
        PID:1452
    • C:\Program Files (x86)\LetsSee!\conf.exe
      "C:\Program Files (x86)\LetsSee!\conf.exe"
      2⤵
      • Executes dropped EXE
      • Checks computer location settings
      • Suspicious use of WriteProcessMemory
      PID:4060
      • C:\Users\Admin\AppData\Roaming\Microsoft\SystemCertificates\My\CTLs\7ZipArchiver\attachmentphoto.exe
        C:\Users\Admin\AppData\Roaming\Microsoft\SystemCertificates\My\CTLs\7ZipArchiver\attachmentphoto.exe
        3⤵
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:4584
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /c SchTasks /create /SC MINUTE /TN 7ZipUnis /TR C:\Users\Admin\AppData\Roaming\Microsoft\SystemCertificates\My\CTLs\7ZipArchiver\volumfix.exe
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:980
          • C:\Windows\SysWOW64\schtasks.exe
            SchTasks /create /SC MINUTE /TN 7ZipUnis /TR C:\Users\Admin\AppData\Roaming\Microsoft\SystemCertificates\My\CTLs\7ZipArchiver\volumfix.exe
            5⤵
            • Creates scheduled task(s)
            PID:4824
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /c SchTasks /create /SC HOURLY /TN FlashServis /TR C:\ProgramData\FlashSys\CurlMSI.exe
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:4288
          • C:\Windows\SysWOW64\schtasks.exe
            SchTasks /create /SC HOURLY /TN FlashServis /TR C:\ProgramData\FlashSys\CurlMSI.exe
            5⤵
            • Creates scheduled task(s)
            PID:4732
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /k ping -n 2 localhost < nul & del /F /Q "C:\Program Files (x86)\LetsSee!\conf.exe"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:3960
        • C:\Windows\SysWOW64\PING.EXE
          ping -n 2 localhost
          4⤵
          • Runs ping.exe
          PID:4932
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 4060 -s 1004
        3⤵
        • Program crash
        PID:2304
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 688 -ip 688
    1⤵
      PID:1404
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 476 -p 4060 -ip 4060
      1⤵
        PID:824

      Network

      MITRE ATT&CK Matrix ATT&CK v6

      Execution

      Scheduled Task

      1
      T1053

      Persistence

      Scheduled Task

      1
      T1053

      Privilege Escalation

      Scheduled Task

      1
      T1053

      Credential Access

      Credentials in Files

      4
      T1081

      Discovery

      Query Registry

      4
      T1012

      System Information Discovery

      4
      T1082

      Remote System Discovery

      1
      T1018

      Collection

      Data from Local System

      4
      T1005

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Program Files (x86)\LetsSee!\YTLoader.exe
        Filesize

        3.0MB

        MD5

        adc9db2753fa3daa6a8156254ba2a5f1

        SHA1

        50ff27e2e1c4acc35768b93b73c03f7630027f04

        SHA256

        f8cc40321301d39f03eaa48d42cbbb2e953b694dc13ccf9d986032c621223fde

        SHA512

        5f7fca8da622035f3a83e562d727ccdd842d623ec376f93c75c3218bddd970c34a9efc66a33cfd6e52a398fa2ed090b890d05aecef53f65a22917d50d31a1195

      • C:\Program Files (x86)\LetsSee!\YTLoader.exe
        Filesize

        3.0MB

        MD5

        adc9db2753fa3daa6a8156254ba2a5f1

        SHA1

        50ff27e2e1c4acc35768b93b73c03f7630027f04

        SHA256

        f8cc40321301d39f03eaa48d42cbbb2e953b694dc13ccf9d986032c621223fde

        SHA512

        5f7fca8da622035f3a83e562d727ccdd842d623ec376f93c75c3218bddd970c34a9efc66a33cfd6e52a398fa2ed090b890d05aecef53f65a22917d50d31a1195

      • C:\Program Files (x86)\LetsSee!\busshost.exe
        Filesize

        914KB

        MD5

        658e674811ebff49dd8ff5b2e5fc03d3

        SHA1

        fe08e682ea246fb054afa1d5b4c81276d39b77a1

        SHA256

        e929aba5f2630f537cc5c9d4067556aa426d9974ee48722de5b0217e16aeb3ed

        SHA512

        30e09260bc878487c19f7b539603b11eeb4132786485077ddda84a423b8445a5971ac7bde761a4c9464b218fa058442d27f5f740ee8c8660f88273aa12e8b2e7

      • C:\Program Files (x86)\LetsSee!\busshost.exe
        Filesize

        914KB

        MD5

        658e674811ebff49dd8ff5b2e5fc03d3

        SHA1

        fe08e682ea246fb054afa1d5b4c81276d39b77a1

        SHA256

        e929aba5f2630f537cc5c9d4067556aa426d9974ee48722de5b0217e16aeb3ed

        SHA512

        30e09260bc878487c19f7b539603b11eeb4132786485077ddda84a423b8445a5971ac7bde761a4c9464b218fa058442d27f5f740ee8c8660f88273aa12e8b2e7

      • C:\Program Files (x86)\LetsSee!\conf.exe
        Filesize

        1.3MB

        MD5

        6aa46c5f2770d99294bbb45dfb79bf22

        SHA1

        06b16891d85dba6f5e761bf1c82f10cf54438495

        SHA256

        3a81ec0e539c4f9ad5bbc7c31ec3996f88ca97f234fe0cf7a36d64fa645002ad

        SHA512

        7f1ca4dd1ea15435950170e16c103761cc71ad38bf1075e2696aa3e2bae1a1668f7d107c3e4a24407631153351605397ff11ce6a057d9bb752c9af56b852c515

      • C:\Program Files (x86)\LetsSee!\conf.exe
        Filesize

        1.3MB

        MD5

        6aa46c5f2770d99294bbb45dfb79bf22

        SHA1

        06b16891d85dba6f5e761bf1c82f10cf54438495

        SHA256

        3a81ec0e539c4f9ad5bbc7c31ec3996f88ca97f234fe0cf7a36d64fa645002ad

        SHA512

        7f1ca4dd1ea15435950170e16c103761cc71ad38bf1075e2696aa3e2bae1a1668f7d107c3e4a24407631153351605397ff11ce6a057d9bb752c9af56b852c515

      • C:\Users\Admin\AppData\Roaming\Microsoft\Protect\win.ini
        Filesize

        199B

        MD5

        3d68da5fd157231843a13667676de3f2

        SHA1

        206082eb56a40f38ba1e852ffcde4cd6e23cc338

        SHA256

        f5c9d294b9c805e38bebe17ac7150bf591df5b28f28db56dc2a1a9e609331759

        SHA512

        e136ed0cc3f47c52b439d72d39fcde3724852ec106e145c5e0dbb6d4d6e69209da7d160e3cc7c7ad51370230ffd4403477a65cd334cf71965473b847db0584a5

      • C:\Users\Admin\AppData\Roaming\Microsoft\SystemCertificates\My\CTLs\7ZipArchiver\attachmentphoto.exe
        Filesize

        1.3MB

        MD5

        6aa46c5f2770d99294bbb45dfb79bf22

        SHA1

        06b16891d85dba6f5e761bf1c82f10cf54438495

        SHA256

        3a81ec0e539c4f9ad5bbc7c31ec3996f88ca97f234fe0cf7a36d64fa645002ad

        SHA512

        7f1ca4dd1ea15435950170e16c103761cc71ad38bf1075e2696aa3e2bae1a1668f7d107c3e4a24407631153351605397ff11ce6a057d9bb752c9af56b852c515

      • C:\Users\Admin\AppData\Roaming\Microsoft\SystemCertificates\My\CTLs\7ZipArchiver\attachmentphoto.exe
        Filesize

        1.3MB

        MD5

        6aa46c5f2770d99294bbb45dfb79bf22

        SHA1

        06b16891d85dba6f5e761bf1c82f10cf54438495

        SHA256

        3a81ec0e539c4f9ad5bbc7c31ec3996f88ca97f234fe0cf7a36d64fa645002ad

        SHA512

        7f1ca4dd1ea15435950170e16c103761cc71ad38bf1075e2696aa3e2bae1a1668f7d107c3e4a24407631153351605397ff11ce6a057d9bb752c9af56b852c515

      • memory/688-140-0x0000000005420000-0x0000000005428000-memory.dmp
        Filesize

        32KB

      • memory/688-139-0x0000000005410000-0x000000000541A000-memory.dmp
        Filesize

        40KB

      • memory/688-141-0x0000000005440000-0x0000000005448000-memory.dmp
        Filesize

        32KB

      • memory/688-142-0x0000000005450000-0x0000000005458000-memory.dmp
        Filesize

        32KB

      • memory/688-143-0x0000000005460000-0x0000000005468000-memory.dmp
        Filesize

        32KB

      • memory/688-144-0x0000000005480000-0x0000000005488000-memory.dmp
        Filesize

        32KB

      • memory/688-145-0x0000000005490000-0x0000000005498000-memory.dmp
        Filesize

        32KB

      • memory/688-146-0x00000000054A0000-0x00000000054A8000-memory.dmp
        Filesize

        32KB

      • memory/688-133-0x0000000000000000-mapping.dmp
      • memory/688-138-0x00000000005E0000-0x00000000008E8000-memory.dmp
        Filesize

        3.0MB

      • memory/980-161-0x0000000000000000-mapping.dmp
      • memory/3960-151-0x0000000000000000-mapping.dmp
      • memory/4060-153-0x0000000000400000-0x0000000000595000-memory.dmp
        Filesize

        1.6MB

      • memory/4060-136-0x0000000000000000-mapping.dmp
      • memory/4060-152-0x0000000002399000-0x000000000242D000-memory.dmp
        Filesize

        592KB

      • memory/4064-130-0x0000000000000000-mapping.dmp
      • memory/4064-154-0x0000000002300000-0x0000000002400000-memory.dmp
        Filesize

        1024KB

      • memory/4064-155-0x0000000000400000-0x0000000000538000-memory.dmp
        Filesize

        1.2MB

      • memory/4064-166-0x0000000000400000-0x0000000000538000-memory.dmp
        Filesize

        1.2MB

      • memory/4064-165-0x0000000002300000-0x0000000002400000-memory.dmp
        Filesize

        1024KB

      • memory/4288-162-0x0000000000000000-mapping.dmp
      • memory/4584-159-0x0000000000400000-0x0000000000595000-memory.dmp
        Filesize

        1.6MB

      • memory/4584-149-0x0000000000000000-mapping.dmp
      • memory/4584-158-0x0000000002293000-0x0000000002327000-memory.dmp
        Filesize

        592KB

      • memory/4584-167-0x0000000000400000-0x0000000000595000-memory.dmp
        Filesize

        1.6MB

      • memory/4732-164-0x0000000000000000-mapping.dmp
      • memory/4824-163-0x0000000000000000-mapping.dmp
      • memory/4932-156-0x0000000000000000-mapping.dmp