Analysis

  • max time kernel
    90s
  • max time network
    123s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240508-en
  • resource tags

    arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    20/06/2024, 04:45

General

  • Target
    b4ed59f2391034891fe8af87450a34eaca1518b400182554e392845f0d21e7a1.exe
  • Size 439KB
  • Sample240620-fdl15stfqm
  • SHA256 b4ed59f2391034891fe8af87450a34eaca1518b400182554e392845f0d21e7a1
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • stealc

rc4.plain

Extracted

Family
  • vidar

C2
  • https://t.me/memve4erin

  • https://steamcommunity.com/profiles/76561199699680841

Attributes
  • user_agent

    Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:129.0) Gecko/20100101 Firefox/129.0

Signatures

  • Detect Vidar Stealer 11 IoCs
  • RedLine

    RedLine Stealer is a malware family written in C#, first appearing in early 2020.

  • RedLine payload 2 IoCs
  • RisePro

    RisePro stealer is an infostealer distributed by PrivateLoader.

  • Stealc

    Stealc is an infostealer written in C++.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Downloads MZ/PE file
  • Executes dropped EXE 3 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 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 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 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 3 IoCs
  • Checks processor information in registry 2 TTPs 1 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of WriteProcessMemory 46 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b4ed59f2391034891fe8af87450a34eaca1518b400182554e392845f0d21e7a1.exe
    "C:\Users\Admin\AppData\Local\Temp\b4ed59f2391034891fe8af87450a34eaca1518b400182554e392845f0d21e7a1.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1948
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
      2⤵
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2280
      • C:\ProgramData\AEHIJDAFBK.exe
        "C:\ProgramData\AEHIJDAFBK.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1428
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
          4⤵
            PID:2648
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
            "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
            4⤵
              PID:3160
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 1428 -s 264
              4⤵
              • Program crash
              PID:4412
          • C:\ProgramData\JDBGHIIDAE.exe
            "C:\ProgramData\JDBGHIIDAE.exe"
            3⤵
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:1624
          • C:\ProgramData\DGIJDAFCFH.exe
            "C:\ProgramData\DGIJDAFCFH.exe"
            3⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:2236
            • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
              "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
              4⤵
                PID:2244
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 2236 -s 284
                4⤵
                • Program crash
                PID:5096
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\System32\cmd.exe" /c timeout /t 10 & rd /s /q "C:\ProgramData\JKEGIDGDGHCA" & exit
              3⤵
              • Suspicious use of WriteProcessMemory
              PID:2968
              • C:\Windows\SysWOW64\timeout.exe
                timeout /t 10
                4⤵
                • Delays execution with timeout.exe
                PID:2252
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 1948 -s 264
            2⤵
            • Program crash
            PID:1368
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 1948 -ip 1948
          1⤵
            PID:2172
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 1428 -ip 1428
            1⤵
              PID:1980
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 2236 -ip 2236
              1⤵
                PID:4420

              Network

                    MITRE ATT&CK Enterprise v15

                    Replay Monitor

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                    Downloads

                    AEHIJDAFBK.exe

                    • Path C:\ProgramData\AEHIJDAFBK.exe
                    • Size 1.8MB
                    • SHA256 9cf43d480f6319717934b1a3f97682a4454c1742e2409aa416ba719e606c34ca
                    • MD5 SHA1 SHA512 SSDEEP

                    DGIJDAFCFH.exe

                    • Path C:\ProgramData\DGIJDAFCFH.exe
                    • Size 525KB
                    • SHA256 fa4491dbe5eb3d35c9f5884d746235769999d536d30033f4cf38633ce2343ede
                    • MD5 SHA1 SHA512 SSDEEP

                    JDBGHIIDAE.exe

                    • Path C:\ProgramData\JDBGHIIDAE.exe
                    • Size 374KB
                    • SHA256 6f1f0ff69f7bf28a1116549249353fcbf944d8d559aaf9c3ecefddb08e341106
                    • MD5 SHA1 SHA512 SSDEEP

                    memory/1428-75-0x00000000011F0000-0x00000000011F1000-memory.dmp

                    memory/1624-113-0x0000000007C70000-0x0000000007D7A000-memory.dmp

                    memory/1624-121-0x000000000A4F0000-0x000000000AA1C000-memory.dmp

                    memory/1624-115-0x0000000007C10000-0x0000000007C4C000-memory.dmp

                    memory/1624-116-0x0000000007D80000-0x0000000007DCC000-memory.dmp

                    memory/1624-114-0x0000000007BB0000-0x0000000007BC2000-memory.dmp

                    memory/1624-96-0x0000000004EC0000-0x0000000004F52000-memory.dmp

                    memory/1624-97-0x0000000004E90000-0x0000000004E9A000-memory.dmp

                    memory/1624-118-0x0000000008D00000-0x0000000008D76000-memory.dmp

                    memory/1624-119-0x0000000008CB0000-0x0000000008CCE000-memory.dmp

                    memory/1624-112-0x0000000008140000-0x0000000008758000-memory.dmp

                    memory/1624-95-0x00000000053D0000-0x0000000005976000-memory.dmp

                    memory/1624-94-0x0000000004D40000-0x0000000004D60000-memory.dmp

                    memory/1624-120-0x0000000009110000-0x00000000092D2000-memory.dmp

                    memory/1624-117-0x00000000089D0000-0x0000000008A36000-memory.dmp

                    memory/1624-93-0x0000000000310000-0x0000000000372000-memory.dmp

                    memory/1948-0-0x0000000000460000-0x0000000000461000-memory.dmp

                    memory/2244-108-0x0000000000400000-0x0000000000454000-memory.dmp

                    memory/2244-109-0x0000000000400000-0x0000000000454000-memory.dmp

                    memory/2280-54-0x0000000000400000-0x0000000000648000-memory.dmp

                    memory/2280-55-0x0000000000400000-0x0000000000648000-memory.dmp

                    memory/2280-1-0x0000000000400000-0x0000000000648000-memory.dmp

                    memory/2280-4-0x0000000000400000-0x0000000000648000-memory.dmp

                    memory/2280-110-0x0000000000400000-0x0000000000648000-memory.dmp

                    memory/2280-111-0x0000000000400000-0x0000000000648000-memory.dmp

                    memory/2280-5-0x0000000000400000-0x0000000000648000-memory.dmp

                    memory/2280-19-0x0000000000400000-0x0000000000648000-memory.dmp

                    memory/2280-38-0x0000000000400000-0x0000000000648000-memory.dmp

                    memory/2280-37-0x0000000000400000-0x0000000000648000-memory.dmp

                    memory/2280-22-0x000000001B7B0000-0x000000001BA0F000-memory.dmp

                    memory/2280-20-0x0000000000400000-0x0000000000648000-memory.dmp

                    memory/3160-78-0x0000000000400000-0x0000000000596000-memory.dmp

                    memory/3160-77-0x0000000000400000-0x0000000000596000-memory.dmp

                    memory/3160-80-0x0000000000400000-0x0000000000596000-memory.dmp

                    memory/3160-76-0x0000000000400000-0x0000000000596000-memory.dmp