Analysis

  • max time kernel
    139s
  • max time network
    124s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240611-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20/06/2024, 04:45

General

  • Target

    b4ed59f2391034891fe8af87450a34eaca1518b400182554e392845f0d21e7a1.exe

  • Size

    439KB

  • MD5

    b2f5d04fc1d63f47ec7cdc2b326b7e83

  • SHA1

    7bf70f68204b0d905d18b1f94d86088f16a15d1f

  • SHA256

    b4ed59f2391034891fe8af87450a34eaca1518b400182554e392845f0d21e7a1

  • SHA512

    23ab37f544227a863c22ab4aaeb2a80986f5bd75e12a2a41f2cf4ddb0cba0fce20f7560dee6e65cad8f022a1cd616bab2c59722213803d12b699151dc2cfaa3a

  • SSDEEP

    6144:8gNhEV5pZ5BXmp4pEEEXI/ajDfJFb7uNmrkbBlpNezk3g7wZXlQkEDFGqymjv:8gjEV5pZ5hwTuNma8ow7glOsGjv

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 13 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
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • 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 6 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:1468
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
      2⤵
        PID:4220
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
        2⤵
        • Checks computer location settings
        • Checks processor information in registry
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:2752
        • C:\ProgramData\BGCAFHCAKF.exe
          "C:\ProgramData\BGCAFHCAKF.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious use of WriteProcessMemory
          PID:1548
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
            "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
            4⤵
              PID:4108
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 1548 -s 256
              4⤵
              • Program crash
              PID:3360
          • C:\ProgramData\GHJEGCAEGI.exe
            "C:\ProgramData\GHJEGCAEGI.exe"
            3⤵
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:4824
          • C:\ProgramData\GCGIDGCGIE.exe
            "C:\ProgramData\GCGIDGCGIE.exe"
            3⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:4460
            • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
              "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
              4⤵
                PID:4588
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 4460 -s 272
                4⤵
                • Program crash
                PID:1256
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\System32\cmd.exe" /c timeout /t 10 & rd /s /q "C:\ProgramData\HDGCAAFBFBKF" & exit
              3⤵
              • Suspicious use of WriteProcessMemory
              PID:4264
              • C:\Windows\SysWOW64\timeout.exe
                timeout /t 10
                4⤵
                • Delays execution with timeout.exe
                PID:3828
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 1468 -s 272
            2⤵
            • Program crash
            PID:4100
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1468 -ip 1468
          1⤵
            PID:3448
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 1548 -ip 1548
            1⤵
              PID:3120
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 4460 -ip 4460
              1⤵
                PID:4348

              Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

              Loading Replay Monitor...

              Downloads

              • C:\ProgramData\BGCAFHCAKF.exe

                Filesize

                1.8MB

                MD5

                9f7d8785aa5e359848ebe4d771f3de8d

                SHA1

                70161505853a4cb3b2dc7eb690bde8b0f23b4d82

                SHA256

                9cf43d480f6319717934b1a3f97682a4454c1742e2409aa416ba719e606c34ca

                SHA512

                b26659c8e24baf0b489198eb28aafa4e29b5728432f522d22202fb5c3d288bd2e33aec88feca1d84b56d42f2dbb369ef517c37815f2c216bae4722bd5dd7700e

              • C:\ProgramData\GCGIDGCGIE.exe

                Filesize

                525KB

                MD5

                555259d9ac1f9da27667485bfc3ab9af

                SHA1

                59d61d0aa693f28ba68b0de8fd3b11dc206b76c4

                SHA256

                fa4491dbe5eb3d35c9f5884d746235769999d536d30033f4cf38633ce2343ede

                SHA512

                ee1e2b3ca43eff5384298c251f1f0b6184a8a892410f998e40202dbc1376da45a1af3643fd5f490c3cd3f1f5fd420759a121c892f969e016d2c0daf11209e45b

              • C:\ProgramData\GHJEGCAEGI.exe

                Filesize

                374KB

                MD5

                4adf8628310c11bc5929175855d16cb6

                SHA1

                10e2317fedbd27741212e89e0c2a1333bc775472

                SHA256

                6f1f0ff69f7bf28a1116549249353fcbf944d8d559aaf9c3ecefddb08e341106

                SHA512

                b3e5b61a6538fe9c14a40e9e144c0be6ea2b5b921d6f3158204a5ae408435191467a0d0054867199f4b0923d040d453f874ff1c004170aac57824171fe063734

              • memory/1468-1-0x0000000001080000-0x0000000001081000-memory.dmp

                Filesize

                4KB

              • memory/1548-82-0x00000000005B0000-0x00000000005B1000-memory.dmp

                Filesize

                4KB

              • memory/2752-22-0x000000001B8F0000-0x000000001BB4F000-memory.dmp

                Filesize

                2.4MB

              • memory/2752-5-0x0000000000400000-0x0000000000648000-memory.dmp

                Filesize

                2.3MB

              • memory/2752-30-0x0000000000400000-0x0000000000648000-memory.dmp

                Filesize

                2.3MB

              • memory/2752-31-0x0000000000400000-0x0000000000648000-memory.dmp

                Filesize

                2.3MB

              • memory/2752-39-0x0000000000400000-0x0000000000648000-memory.dmp

                Filesize

                2.3MB

              • memory/2752-40-0x0000000000400000-0x0000000000648000-memory.dmp

                Filesize

                2.3MB

              • memory/2752-56-0x0000000000400000-0x0000000000648000-memory.dmp

                Filesize

                2.3MB

              • memory/2752-57-0x0000000000400000-0x0000000000648000-memory.dmp

                Filesize

                2.3MB

              • memory/2752-19-0x0000000000400000-0x0000000000648000-memory.dmp

                Filesize

                2.3MB

              • memory/2752-112-0x0000000000400000-0x0000000000648000-memory.dmp

                Filesize

                2.3MB

              • memory/2752-113-0x0000000000400000-0x0000000000648000-memory.dmp

                Filesize

                2.3MB

              • memory/2752-0-0x0000000000400000-0x0000000000648000-memory.dmp

                Filesize

                2.3MB

              • memory/2752-4-0x0000000000400000-0x0000000000648000-memory.dmp

                Filesize

                2.3MB

              • memory/2752-20-0x0000000000400000-0x0000000000648000-memory.dmp

                Filesize

                2.3MB

              • memory/4108-80-0x0000000000400000-0x0000000000596000-memory.dmp

                Filesize

                1.6MB

              • memory/4108-81-0x0000000000400000-0x0000000000596000-memory.dmp

                Filesize

                1.6MB

              • memory/4108-78-0x0000000000400000-0x0000000000596000-memory.dmp

                Filesize

                1.6MB

              • memory/4108-77-0x0000000000400000-0x0000000000596000-memory.dmp

                Filesize

                1.6MB

              • memory/4588-111-0x0000000000400000-0x0000000000454000-memory.dmp

                Filesize

                336KB

              • memory/4588-110-0x0000000000400000-0x0000000000454000-memory.dmp

                Filesize

                336KB

              • memory/4824-95-0x0000000000750000-0x00000000007B2000-memory.dmp

                Filesize

                392KB

              • memory/4824-99-0x0000000005210000-0x000000000521A000-memory.dmp

                Filesize

                40KB

              • memory/4824-98-0x0000000005290000-0x0000000005322000-memory.dmp

                Filesize

                584KB

              • memory/4824-97-0x00000000058F0000-0x0000000005E94000-memory.dmp

                Filesize

                5.6MB

              • memory/4824-96-0x0000000002B70000-0x0000000002B90000-memory.dmp

                Filesize

                128KB

              • memory/4824-114-0x00000000085A0000-0x0000000008BB8000-memory.dmp

                Filesize

                6.1MB

              • memory/4824-115-0x00000000080D0000-0x00000000081DA000-memory.dmp

                Filesize

                1.0MB

              • memory/4824-116-0x0000000007FF0000-0x0000000008002000-memory.dmp

                Filesize

                72KB

              • memory/4824-117-0x0000000008050000-0x000000000808C000-memory.dmp

                Filesize

                240KB

              • memory/4824-118-0x00000000081E0000-0x000000000822C000-memory.dmp

                Filesize

                304KB

              • memory/4824-119-0x0000000008E30000-0x0000000008E96000-memory.dmp

                Filesize

                408KB

              • memory/4824-120-0x0000000009120000-0x0000000009196000-memory.dmp

                Filesize

                472KB

              • memory/4824-121-0x0000000006A70000-0x0000000006A8E000-memory.dmp

                Filesize

                120KB

              • memory/4824-122-0x000000000A1A0000-0x000000000A362000-memory.dmp

                Filesize

                1.8MB

              • memory/4824-123-0x000000000A8A0000-0x000000000ADCC000-memory.dmp

                Filesize

                5.2MB