Analysis

  • max time kernel
    147s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    20-06-2022 05:25

General

  • Target

    32bccc3fff74705522284e13e8c382cb8b337ca6d5aa22e36e1183a498be603f.exe

  • Size

    4.3MB

  • MD5

    65ff785b3c3fd7b28efd2e4f6e4bddfb

  • SHA1

    e529676f41a9e87a40c59102e58e35be45e28fcc

  • SHA256

    32bccc3fff74705522284e13e8c382cb8b337ca6d5aa22e36e1183a498be603f

  • SHA512

    79fead17f47de53fa0e8d23e1ed9461563e5f45fe30c483eadbd774913c200e75e7b0eff6a5340315afbe53f57a5c3147da8a90937553094a6605519d89d1431

Malware Config

Extracted

Family

vidar

Version

10.1

Botnet

231

C2

http://tribecaflatstore.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 4 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\32bccc3fff74705522284e13e8c382cb8b337ca6d5aa22e36e1183a498be603f.exe
    "C:\Users\Admin\AppData\Local\Temp\32bccc3fff74705522284e13e8c382cb8b337ca6d5aa22e36e1183a498be603f.exe"
    1⤵
    • Checks computer location settings
    • Drops file in Program Files directory
    • Suspicious use of WriteProcessMemory
    PID:3456
    • 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:1904
    • 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:3592
      • 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:4804
        • 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:3952
        • 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:3856
      • 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:4272
        • C:\Windows\SysWOW64\PING.EXE
          ping -n 2 localhost
          4⤵
          • Runs ping.exe
          PID:2012
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 3592 -s 1128
        3⤵
        • Program crash
        PID:1436
    • 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:3756
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 3756 -s 1608
        3⤵
        • Program crash
        PID:2572
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 3756 -ip 3756
    1⤵
      PID:4260
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 3592 -ip 3592
      1⤵
        PID:4176
      • C:\Windows\SysWOW64\schtasks.exe
        SchTasks /create /SC MINUTE /TN 7ZipUnis /TR C:\Users\Admin\AppData\Roaming\Microsoft\SystemCertificates\My\CTLs\7ZipArchiver\volumfix.exe
        1⤵
        • Creates scheduled task(s)
        PID:4760
      • C:\Windows\SysWOW64\schtasks.exe
        SchTasks /create /SC HOURLY /TN FlashServis /TR C:\ProgramData\FlashSys\CurlMSI.exe
        1⤵
        • Creates scheduled task(s)
        PID:4632

      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

        728KB

        MD5

        35a1aab90a4c06bec878a095f5a45379

        SHA1

        20709a1631774fd21f93dd710e1c398df5e7b5ed

        SHA256

        c8717078951bcfebf8d180765f26e2a994fd5545fd7f71ad9353dbf24f90d915

        SHA512

        d94445dc92c524a56732bb0ea54fa5d09998293b8e1be4f28183659e7839af27c88a700a753e043253eb627436339dddcf1f5560911e225e4bceb1baed5d0f21

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

        728KB

        MD5

        35a1aab90a4c06bec878a095f5a45379

        SHA1

        20709a1631774fd21f93dd710e1c398df5e7b5ed

        SHA256

        c8717078951bcfebf8d180765f26e2a994fd5545fd7f71ad9353dbf24f90d915

        SHA512

        d94445dc92c524a56732bb0ea54fa5d09998293b8e1be4f28183659e7839af27c88a700a753e043253eb627436339dddcf1f5560911e225e4bceb1baed5d0f21

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

        1.0MB

        MD5

        8670880cc194c53fb33adcfec30b1af5

        SHA1

        23a8227a18d2227e760266ba5d8610c8b07e023c

        SHA256

        c28fe399970b309437febd959a7f8346899faa5a7d1d157b38169ef7e4091aa5

        SHA512

        2774c525ecfbfea709d3c4193d250dc2263bf6926a0acaeae012fa97b4b5be0f8ffce037367b4a43323b27c8d0cd966b17b795ab2dff2f59a650ce412259138c

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

        1.0MB

        MD5

        8670880cc194c53fb33adcfec30b1af5

        SHA1

        23a8227a18d2227e760266ba5d8610c8b07e023c

        SHA256

        c28fe399970b309437febd959a7f8346899faa5a7d1d157b38169ef7e4091aa5

        SHA512

        2774c525ecfbfea709d3c4193d250dc2263bf6926a0acaeae012fa97b4b5be0f8ffce037367b4a43323b27c8d0cd966b17b795ab2dff2f59a650ce412259138c

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

        199B

        MD5

        3d68da5fd157231843a13667676de3f2

        SHA1

        206082eb56a40f38ba1e852ffcde4cd6e23cc338

        SHA256

        f5c9d294b9c805e38bebe17ac7150bf591df5b28f28db56dc2a1a9e609331759

        SHA512

        e136ed0cc3f47c52b439d72d39fcde3724852ec106e145c5e0dbb6d4d6e69209da7d160e3cc7c7ad51370230ffd4403477a65cd334cf71965473b847db0584a5

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

        1.0MB

        MD5

        8670880cc194c53fb33adcfec30b1af5

        SHA1

        23a8227a18d2227e760266ba5d8610c8b07e023c

        SHA256

        c28fe399970b309437febd959a7f8346899faa5a7d1d157b38169ef7e4091aa5

        SHA512

        2774c525ecfbfea709d3c4193d250dc2263bf6926a0acaeae012fa97b4b5be0f8ffce037367b4a43323b27c8d0cd966b17b795ab2dff2f59a650ce412259138c

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

        1.0MB

        MD5

        8670880cc194c53fb33adcfec30b1af5

        SHA1

        23a8227a18d2227e760266ba5d8610c8b07e023c

        SHA256

        c28fe399970b309437febd959a7f8346899faa5a7d1d157b38169ef7e4091aa5

        SHA512

        2774c525ecfbfea709d3c4193d250dc2263bf6926a0acaeae012fa97b4b5be0f8ffce037367b4a43323b27c8d0cd966b17b795ab2dff2f59a650ce412259138c

      • memory/1904-166-0x0000000000400000-0x00000000004D7000-memory.dmp
        Filesize

        860KB

      • memory/1904-165-0x0000000002160000-0x0000000002260000-memory.dmp
        Filesize

        1024KB

      • memory/1904-153-0x0000000000400000-0x00000000004D7000-memory.dmp
        Filesize

        860KB

      • memory/1904-152-0x0000000002160000-0x0000000002260000-memory.dmp
        Filesize

        1024KB

      • memory/1904-130-0x0000000000000000-mapping.dmp
      • memory/2012-160-0x0000000000000000-mapping.dmp
      • memory/3592-135-0x0000000000000000-mapping.dmp
      • memory/3592-155-0x0000000000400000-0x0000000000526000-memory.dmp
        Filesize

        1.1MB

      • memory/3592-154-0x0000000002245000-0x00000000022DB000-memory.dmp
        Filesize

        600KB

      • memory/3756-139-0x00000000050D0000-0x00000000050DA000-memory.dmp
        Filesize

        40KB

      • memory/3756-140-0x00000000050E0000-0x00000000050E8000-memory.dmp
        Filesize

        32KB

      • memory/3756-146-0x0000000005180000-0x0000000005188000-memory.dmp
        Filesize

        32KB

      • memory/3756-145-0x0000000005170000-0x0000000005178000-memory.dmp
        Filesize

        32KB

      • memory/3756-142-0x0000000005130000-0x0000000005138000-memory.dmp
        Filesize

        32KB

      • memory/3756-144-0x0000000005160000-0x0000000005168000-memory.dmp
        Filesize

        32KB

      • memory/3756-133-0x0000000000000000-mapping.dmp
      • memory/3756-143-0x0000000005140000-0x0000000005148000-memory.dmp
        Filesize

        32KB

      • memory/3756-141-0x0000000005120000-0x0000000005128000-memory.dmp
        Filesize

        32KB

      • memory/3756-138-0x0000000000400000-0x0000000000708000-memory.dmp
        Filesize

        3.0MB

      • memory/3856-158-0x0000000000000000-mapping.dmp
      • memory/3952-159-0x0000000000000000-mapping.dmp
      • memory/4272-151-0x0000000000000000-mapping.dmp
      • memory/4632-161-0x0000000000000000-mapping.dmp
      • memory/4760-162-0x0000000000000000-mapping.dmp
      • memory/4804-163-0x000000000223D000-0x00000000022D3000-memory.dmp
        Filesize

        600KB

      • memory/4804-164-0x0000000000400000-0x0000000000526000-memory.dmp
        Filesize

        1.1MB

      • memory/4804-149-0x0000000000000000-mapping.dmp
      • memory/4804-167-0x0000000000400000-0x0000000000526000-memory.dmp
        Filesize

        1.1MB