Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05/08/2024, 16:49

General

  • Target
    lem.exe
  • Size 842KB
  • Sample240805-vb54kawcph
  • SHA256 d3b3da570c489317ccaa129c2c66cc8765afaf20b5e4ccc24a88dd6b90e64920
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • vidar

C2
  • https://steamcommunity.com/profiles/76561199747278259

  • https://t.me/armad2a

Attributes
  • user_agent

    Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 YaBrowser/24.6.0.1 Safari/537.36

Signatures

  • Detect Vidar Stealer 15 IoCs
  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Credentials from Password Stores: Credentials from Web Browsers 1 TTPs

    Malicious Access or copy of Web Browser Credential store.

  • Downloads MZ/PE file
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of web browsers 2 TTPs

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

  • Unsecured Credentials: Credentials In Files 1 TTPs

    Steal credentials from unsecured files.

  • Accesses cryptocurrency files/wallets, 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.

  • Enumerates processes with tasklist 1 TTPs 2 IoCs
  • Drops file in Windows directory 23 IoCs
  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 13 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Delays execution with timeout.exe 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 14 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of FindShellTrayWindow 3 IoCs
  • Suspicious use of SendNotifyMessage 3 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\lem.exe
    "C:\Users\Admin\AppData\Local\Temp\lem.exe"
    1⤵
    • Checks computer location settings
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2468
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k move Uniform Uniform.cmd & Uniform.cmd & exit
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3232
      • C:\Windows\SysWOW64\tasklist.exe
        tasklist
        3⤵
        • Enumerates processes with tasklist
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        PID:4408
      • C:\Windows\SysWOW64\findstr.exe
        findstr /I "wrsa.exe opssvc.exe"
        3⤵
        • System Location Discovery: System Language Discovery
        PID:1008
      • C:\Windows\SysWOW64\tasklist.exe
        tasklist
        3⤵
        • Enumerates processes with tasklist
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        PID:3168
      • C:\Windows\SysWOW64\findstr.exe
        findstr /I "avastui.exe avgui.exe bdservicehost.exe nswscsvc.exe sophoshealth.exe"
        3⤵
        • System Location Discovery: System Language Discovery
        PID:4072
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c md 366791
        3⤵
        • System Location Discovery: System Language Discovery
        PID:3632
      • C:\Windows\SysWOW64\findstr.exe
        findstr /V "TrailersTractOffersVenezuela" Mines
        3⤵
        • System Location Discovery: System Language Discovery
        PID:1628
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c copy /b Pending + Smith + Specifications + Resident 366791\M
        3⤵
        • System Location Discovery: System Language Discovery
        PID:2644
      • C:\Users\Admin\AppData\Local\Temp\366791\Gift.pif
        366791\Gift.pif 366791\M
        3⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Checks processor information in registry
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        • Suspicious use of WriteProcessMemory
        PID:2452
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\system32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\366791\Gift.pif" & rd /s /q "C:\ProgramData\HJJJDAEGIDHC" & exit
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:1008
          • C:\Windows\SysWOW64\timeout.exe
            timeout /t 10
            5⤵
            • System Location Discovery: System Language Discovery
            • Delays execution with timeout.exe
            PID:536
      • C:\Windows\SysWOW64\timeout.exe
        timeout 5
        3⤵
        • System Location Discovery: System Language Discovery
        • Delays execution with timeout.exe
        PID:1512

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        mozglue.dll

        • Path C:\ProgramData\mozglue.dll
        • Size 593KB
        • SHA256 ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a
        • MD5 SHA1 SHA512 SSDEEP

        nss3.dll

        • Path C:\ProgramData\nss3.dll
        • Size 2.0MB
        • SHA256 ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5
        • MD5 SHA1 SHA512 SSDEEP

        Gift.pif

        • Path C:\Users\Admin\AppData\Local\Temp\366791\Gift.pif
        • Size 872KB
        • SHA256 865347471135bb5459ad0e647e75a14ad91424b6f13a5c05d9ecd9183a8a1cf4
        • MD5 SHA1 SHA512 SSDEEP

        M

        • Path C:\Users\Admin\AppData\Local\Temp\366791\M
        • Size 319KB
        • SHA256 877a4011cb5c924756363e451c752be5931945cd2077fbb56cfbba29f3a3d6de
        • MD5 SHA1 SHA512 SSDEEP

        Advertising

        • Path C:\Users\Admin\AppData\Local\Temp\Advertising
        • Size 37KB
        • SHA256 a5526dddd5e0ea2d1d4da2f1e02a1526e6a55a6659ac7188951caaf59355eb5e
        • MD5 SHA1 SHA512 SSDEEP

        Ak

        • Path C:\Users\Admin\AppData\Local\Temp\Ak
        • Size 61KB
        • SHA256 10b792b6356593166d5c2d19c5ab78a5c4d88df13c2e5c9dc21519c403f18a44
        • MD5 SHA1 SHA512 SSDEEP

        Appendix

        • Path C:\Users\Admin\AppData\Local\Temp\Appendix
        • Size 47KB
        • SHA256 f716cfd3992dedc91fd387460eef10278ed02a3712ecd4d44de47434d047b558
        • MD5 SHA1 SHA512 SSDEEP

        Automobile

        • Path C:\Users\Admin\AppData\Local\Temp\Automobile
        • Size 13KB
        • SHA256 1caec310bb5559f84c05061a93a7ec4ddd6d617192f7b8cf2f990913f23a4479
        • MD5 SHA1 SHA512 SSDEEP

        Beverages

        • Path C:\Users\Admin\AppData\Local\Temp\Beverages
        • Size 36KB
        • SHA256 183f0c5f3bcdc8cf4af78080681fe13d4ab8aac8c167dbb8c2b8a440983b5ee2
        • MD5 SHA1 SHA512 SSDEEP

        China

        • Path C:\Users\Admin\AppData\Local\Temp\China
        • Size 24KB
        • SHA256 5542fd17fd4199d8bbaef1d82115a9e1f1f17c5e6409b17c1de92f00077e3557
        • MD5 SHA1 SHA512 SSDEEP

        Failing

        • Path C:\Users\Admin\AppData\Local\Temp\Failing
        • Size 20KB
        • SHA256 b6b2ac5a581567cb095a6519cf0ac50d20bfb5b0d95b69cccacc84714a925c8a
        • MD5 SHA1 SHA512 SSDEEP

        Gamma

        • Path C:\Users\Admin\AppData\Local\Temp\Gamma
        • Size 24KB
        • SHA256 acf7387994a2158a43ce481fe01f854af5e43f7e4acd078c5a0dabad9891e43d
        • MD5 SHA1 SHA512 SSDEEP

        Granted

        • Path C:\Users\Admin\AppData\Local\Temp\Granted
        • Size 27KB
        • SHA256 a16af249569396606bcc03f0e2b828187e40e1f507ef07e8150ca1a439d47c20
        • MD5 SHA1 SHA512 SSDEEP

        Hi

        • Path C:\Users\Admin\AppData\Local\Temp\Hi
        • Size 54KB
        • SHA256 9949938d88359593913780498287069b7b8147d59afc036ee9d9df39237008c9
        • MD5 SHA1 SHA512 SSDEEP

        Immigrants

        • Path C:\Users\Admin\AppData\Local\Temp\Immigrants
        • Size 33KB
        • SHA256 443a1e33174c5f6c5afb73e58dbf6d7cd9957f96af924478c13d13fcaba4bb1c
        • MD5 SHA1 SHA512 SSDEEP

        Insulin

        • Path C:\Users\Admin\AppData\Local\Temp\Insulin
        • Size 50KB
        • SHA256 ac6c5c42c7b866e196c00d91d38c105ce1ec6ceb9d42ed42d19966d3a25c3c5b
        • MD5 SHA1 SHA512 SSDEEP

        Likewise

        • Path C:\Users\Admin\AppData\Local\Temp\Likewise
        • Size 9KB
        • SHA256 866f7ffbbfc2f00f20b89c4a00e2ad55f1f89747f85facd0a0fcacf897d2ab95
        • MD5 SHA1 SHA512 SSDEEP

        Manufacturer

        • Path C:\Users\Admin\AppData\Local\Temp\Manufacturer
        • Size 48KB
        • SHA256 a14dfc374ae5b1aa23702639b30cb774fa4ed45366491bcff8bba53146561657
        • MD5 SHA1 SHA512 SSDEEP

        Middle

        • Path C:\Users\Admin\AppData\Local\Temp\Middle
        • Size 16KB
        • SHA256 f8d6c90704462addd02518d5d8d083456f9484370a40def5697317f191b74399
        • MD5 SHA1 SHA512 SSDEEP

        Mines

        • Path C:\Users\Admin\AppData\Local\Temp\Mines
        • Size 175B
        • SHA256 a8f6b1f27110519663b2ce7f918f64f43884a6619700621445ba3723d7b965b4
        • MD5 SHA1 SHA512

        Myspace

        • Path C:\Users\Admin\AppData\Local\Temp\Myspace
        • Size 10KB
        • SHA256 9696688f7ee46d7a1fb80792c3929b248cca9780782aae863d429704639d8703
        • MD5 SHA1 SHA512 SSDEEP

        Nutritional

        • Path C:\Users\Admin\AppData\Local\Temp\Nutritional
        • Size 63KB
        • SHA256 8e50c6305afc5d826d84a45f3770f452191c1e29c4b1a9b9f6b7d8b3fce31c28
        • MD5 SHA1 SHA512 SSDEEP

        Optimum

        • Path C:\Users\Admin\AppData\Local\Temp\Optimum
        • Size 9KB
        • SHA256 04bd58ba9616cc3a1d8a4cff1abc6d1ba6215c06269812951792d380750da8a0
        • MD5 SHA1 SHA512 SSDEEP

        Pending

        • Path C:\Users\Admin\AppData\Local\Temp\Pending
        • Size 105KB
        • SHA256 57b5e786156cafd3ccfe670dd1f6d73c755e5215af9b06046e66c8091315f789
        • MD5 SHA1 SHA512 SSDEEP

        Plastics

        • Path C:\Users\Admin\AppData\Local\Temp\Plastics
        • Size 27KB
        • SHA256 da5fb20b02246a2a1c167321579d3ae997de9d9a23e6b8d898e6446962893068
        • MD5 SHA1 SHA512 SSDEEP

        Race

        • Path C:\Users\Admin\AppData\Local\Temp\Race
        • Size 10KB
        • SHA256 b0450f34cbd94fc1c17f8a5e3d8a55b2dd176558e6bdc89655eedf557322019b
        • MD5 SHA1 SHA512 SSDEEP

        Reached

        • Path C:\Users\Admin\AppData\Local\Temp\Reached
        • Size 49KB
        • SHA256 f726d7a85b020f63bc9d6d35333b1a90fbf71313197251b328c9ba17d70ed7af
        • MD5 SHA1 SHA512 SSDEEP

        Resident

        • Path C:\Users\Admin\AppData\Local\Temp\Resident
        • Size 27KB
        • SHA256 76ea29bcb320600e55703872119912dd0135050aaa0680ca01aadc514e5f02ea
        • MD5 SHA1 SHA512 SSDEEP

        Residents

        • Path C:\Users\Admin\AppData\Local\Temp\Residents
        • Size 57KB
        • SHA256 e0dc90c531c6863d456fa03dbfac4153f95c7841c898f9d8841c5a909a09ddac
        • MD5 SHA1 SHA512 SSDEEP

        Secret

        • Path C:\Users\Admin\AppData\Local\Temp\Secret
        • Size 46KB
        • SHA256 995d1b705d45492bd720b1dbe3f74d37f6e0d700b65b28febb13bb3fa3f96daa
        • MD5 SHA1 SHA512 SSDEEP

        Slovakia

        • Path C:\Users\Admin\AppData\Local\Temp\Slovakia
        • Size 61KB
        • SHA256 bb24d79db3fd448cca16c1db1fd30e97b2eb4013719e7234b4eb1b028db76172
        • MD5 SHA1 SHA512 SSDEEP

        Smith

        • Path C:\Users\Admin\AppData\Local\Temp\Smith
        • Size 84KB
        • SHA256 df32a06032474cb11913b8ce9b94cf26ca6f2caa6397a0fbfe83342e6e1ef150
        • MD5 SHA1 SHA512 SSDEEP

        Specifications

        • Path C:\Users\Admin\AppData\Local\Temp\Specifications
        • Size 103KB
        • SHA256 8f7c5e402d4d76c19c42b46f0debcfdd99c6b2403c4284218ef39a14c042bdc9
        • MD5 SHA1 SHA512 SSDEEP

        Stats

        • Path C:\Users\Admin\AppData\Local\Temp\Stats
        • Size 17KB
        • SHA256 3471829a3c70d0871a10543bbe7becf3e5eaba32bbc274da9f2325bf0b3a7df3
        • MD5 SHA1 SHA512 SSDEEP

        Surfaces

        • Path C:\Users\Admin\AppData\Local\Temp\Surfaces
        • Size 24KB
        • SHA256 df5e4a5572729cd7d99c2d4575d2dc97515d4e2ab07f5b2bffc49650de0a8a3d
        • MD5 SHA1 SHA512 SSDEEP

        Uniform

        • Path C:\Users\Admin\AppData\Local\Temp\Uniform
        • Size 12KB
        • SHA256 b8f7bfd9621c81f65f9194d7f1cb2c3e91716c0478385380fb3cb219937af8e3
        • MD5 SHA1 SHA512 SSDEEP

        memory/2452-76-0x0000000003DE0000-0x0000000004023000-memory.dmp

        memory/2452-111-0x0000000003DE0000-0x0000000004023000-memory.dmp

        memory/2452-73-0x0000000003DE0000-0x0000000004023000-memory.dmp

        memory/2452-75-0x0000000003DE0000-0x0000000004023000-memory.dmp

        memory/2452-78-0x0000000003DE0000-0x0000000004023000-memory.dmp

        memory/2452-79-0x0000000003DE0000-0x0000000004023000-memory.dmp

        memory/2452-80-0x0000000012100000-0x000000001235F000-memory.dmp

        memory/2452-94-0x0000000003DE0000-0x0000000004023000-memory.dmp

        memory/2452-95-0x0000000003DE0000-0x0000000004023000-memory.dmp

        memory/2452-74-0x0000000003DE0000-0x0000000004023000-memory.dmp

        memory/2452-112-0x0000000003DE0000-0x0000000004023000-memory.dmp

        memory/2452-72-0x0000000003DE0000-0x0000000004023000-memory.dmp

        memory/2452-71-0x0000000003DE0000-0x0000000004023000-memory.dmp

        memory/2452-134-0x0000000003DE0000-0x0000000004023000-memory.dmp

        memory/2452-135-0x0000000003DE0000-0x0000000004023000-memory.dmp

        memory/2452-145-0x0000000003DE0000-0x0000000004023000-memory.dmp

        memory/2452-146-0x0000000003DE0000-0x0000000004023000-memory.dmp

        memory/2452-147-0x0000000003DE0000-0x0000000004023000-memory.dmp

        memory/2452-148-0x0000000003DE0000-0x0000000004023000-memory.dmp