Resubmissions

03/10/2024, 20:46

241003-zklthazamd10

02/10/2024, 15:16

241002-snmfwawhqd10

01/10/2024, 01:49

241001-b8w3davemp10

Analysis

  • max time kernel
    119s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20240729-en
  • resource tags

    arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
  • submitted
    03/10/2024, 20:46

General

  • Target
    de664956d799e59e1cca0788d545922ee420e3afdcf277442f148f52bc78df89.exe
  • Size 404KB
  • Sample241003-zklthazamd
  • SHA256 de664956d799e59e1cca0788d545922ee420e3afdcf277442f148f52bc78df89
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • vidar

Version
  • 11

Botnet
  • a669a86f8433a1e88901711c0f772c97

C2
  • https://t.me/jamsemlg

  • https://steamcommunity.com/profiles/76561199780418869

  • https://t.me/ae5ed

Attributes
  • user_agent

    Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:130.0) Gecko/20100101 Firefox/130.0

Signatures

  • Detect Vidar Stealer 17 IoCs
  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Downloads MZ/PE file
  • 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 3 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.

  • Suspicious use of SetThreadContext 1 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 4 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 1 IoCs
  • Modifies system certificate store 2 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of WriteProcessMemory 22 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\de664956d799e59e1cca0788d545922ee420e3afdcf277442f148f52bc78df89.exe
    "C:\Users\Admin\AppData\Local\Temp\de664956d799e59e1cca0788d545922ee420e3afdcf277442f148f52bc78df89.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2932
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Checks processor information in registry
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2688
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /c timeout /t 10 & rd /s /q "C:\ProgramData\BKECAEBGHDAE" & exit
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:1724
        • C:\Windows\SysWOW64\timeout.exe
          timeout /t 10
          4⤵
          • System Location Discovery: System Language Discovery
          • Delays execution with timeout.exe
          PID:692

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        CabF2BA.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\CabF2BA.tmp
        • Size 70KB
        • SHA256 b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f
        • MD5 SHA1 SHA512 SSDEEP

        TarF2EC.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\TarF2EC.tmp
        • Size 181KB
        • SHA256 8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8
        • MD5 SHA1 SHA512 SSDEEP

        mozglue.dll

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

        nss3.dll

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

        memory/2688-166-0x0000000000400000-0x0000000000676000-memory.dmp

        memory/2688-387-0x0000000000400000-0x0000000000676000-memory.dmp

        memory/2688-18-0x0000000000400000-0x0000000000676000-memory.dmp

        memory/2688-16-0x0000000000400000-0x0000000000676000-memory.dmp

        memory/2688-14-0x0000000000400000-0x0000000000676000-memory.dmp

        memory/2688-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        memory/2688-11-0x0000000000400000-0x0000000000676000-memory.dmp

        memory/2688-10-0x0000000000400000-0x0000000000676000-memory.dmp

        memory/2688-9-0x0000000000400000-0x0000000000676000-memory.dmp

        memory/2688-22-0x0000000000400000-0x0000000000676000-memory.dmp

        memory/2688-3-0x0000000000400000-0x0000000000676000-memory.dmp

        memory/2688-5-0x0000000000400000-0x0000000000676000-memory.dmp

        memory/2688-520-0x0000000000400000-0x0000000000676000-memory.dmp

        memory/2688-204-0x0000000020710000-0x000000002096F000-memory.dmp

        memory/2688-7-0x0000000000400000-0x0000000000676000-memory.dmp

        memory/2688-215-0x0000000000400000-0x0000000000676000-memory.dmp

        memory/2688-234-0x0000000000400000-0x0000000000676000-memory.dmp

        memory/2688-447-0x0000000000400000-0x0000000000676000-memory.dmp

        memory/2688-428-0x0000000000400000-0x0000000000676000-memory.dmp

        memory/2688-365-0x0000000000400000-0x0000000000676000-memory.dmp

        memory/2688-384-0x0000000000400000-0x0000000000676000-memory.dmp

        memory/2688-185-0x0000000000400000-0x0000000000676000-memory.dmp

        memory/2932-1-0x00000000012F0000-0x000000000135A000-memory.dmp

        memory/2932-0-0x0000000074D5E000-0x0000000074D5F000-memory.dmp

        memory/2932-19-0x0000000074D50000-0x000000007543E000-memory.dmp