Analysis

  • max time kernel
    140s
  • max time network
    128s
  • 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, 04:39

General

  • Target

    b2f5d04fc1d63f47ec7cdc2b326b7e83.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 30 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of WriteProcessMemory 43 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b2f5d04fc1d63f47ec7cdc2b326b7e83.exe
    "C:\Users\Admin\AppData\Local\Temp\b2f5d04fc1d63f47ec7cdc2b326b7e83.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3016
    • 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:3148
      • C:\ProgramData\FIIDBKJJDG.exe
        "C:\ProgramData\FIIDBKJJDG.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:688
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
          4⤵
            PID:3336
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 688 -s 252
            4⤵
            • Program crash
            PID:4424
        • C:\ProgramData\FIIDBKJJDG.exe
          "C:\ProgramData\FIIDBKJJDG.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:828
        • C:\ProgramData\JDAFHCGIJE.exe
          "C:\ProgramData\JDAFHCGIJE.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious use of WriteProcessMemory
          PID:2072
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
            "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
            4⤵
              PID:3796
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 2072 -s 284
              4⤵
              • Program crash
              PID:4568
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\System32\cmd.exe" /c timeout /t 10 & rd /s /q "C:\ProgramData\IJEGDBGDBFIJ" & exit
            3⤵
            • Suspicious use of WriteProcessMemory
            PID:4592
            • C:\Windows\SysWOW64\timeout.exe
              timeout /t 10
              4⤵
              • Delays execution with timeout.exe
              PID:4608
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3016 -s 252
          2⤵
          • Program crash
          PID:1108
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 3016 -ip 3016
        1⤵
          PID:2816
        • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
          "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=1720,i,18320353784098040629,17273168055569331828,262144 --variations-seed-version --mojo-platform-channel-handle=4436 /prefetch:8
          1⤵
            PID:1056
          • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
            "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --field-trial-handle=3572,i,18320353784098040629,17273168055569331828,262144 --variations-seed-version --mojo-platform-channel-handle=3220 /prefetch:3
            1⤵
              PID:224
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 688 -ip 688
              1⤵
                PID:972
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -pss -s 512 -p 2072 -ip 2072
                1⤵
                  PID:3212

                Network

                MITRE ATT&CK Enterprise v15

                Replay Monitor

                Loading Replay Monitor...

                Downloads

                • C:\ProgramData\FIIDBKJJDG.exe

                  Filesize

                  1.8MB

                  MD5

                  9f7d8785aa5e359848ebe4d771f3de8d

                  SHA1

                  70161505853a4cb3b2dc7eb690bde8b0f23b4d82

                  SHA256

                  9cf43d480f6319717934b1a3f97682a4454c1742e2409aa416ba719e606c34ca

                  SHA512

                  b26659c8e24baf0b489198eb28aafa4e29b5728432f522d22202fb5c3d288bd2e33aec88feca1d84b56d42f2dbb369ef517c37815f2c216bae4722bd5dd7700e

                • C:\ProgramData\FIIDBKJJDG.exe

                  Filesize

                  374KB

                  MD5

                  4adf8628310c11bc5929175855d16cb6

                  SHA1

                  10e2317fedbd27741212e89e0c2a1333bc775472

                  SHA256

                  6f1f0ff69f7bf28a1116549249353fcbf944d8d559aaf9c3ecefddb08e341106

                  SHA512

                  b3e5b61a6538fe9c14a40e9e144c0be6ea2b5b921d6f3158204a5ae408435191467a0d0054867199f4b0923d040d453f874ff1c004170aac57824171fe063734

                • C:\ProgramData\JDAFHCGIJE.exe

                  Filesize

                  525KB

                  MD5

                  555259d9ac1f9da27667485bfc3ab9af

                  SHA1

                  59d61d0aa693f28ba68b0de8fd3b11dc206b76c4

                  SHA256

                  fa4491dbe5eb3d35c9f5884d746235769999d536d30033f4cf38633ce2343ede

                  SHA512

                  ee1e2b3ca43eff5384298c251f1f0b6184a8a892410f998e40202dbc1376da45a1af3643fd5f490c3cd3f1f5fd420759a121c892f969e016d2c0daf11209e45b

                • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Network\SCT Auditing Pending Reports

                  Filesize

                  2B

                  MD5

                  d751713988987e9331980363e24189ce

                  SHA1

                  97d170e1550eee4afc0af065b78cda302a97674c

                  SHA256

                  4f53cda18c2baa0c0354bb5f9a3ecbe5ed12ab4d8e11ba873c2f11161202b945

                  SHA512

                  b25b294cb4deb69ea00a4c3cf3113904801b6015e5956bd019a8570b1fe1d6040e944ef3cdee16d0a46503ca6e659a25f21cf9ceddc13f352a3c98138c15d6af

                • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Network\Sdch Dictionaries

                  Filesize

                  40B

                  MD5

                  20d4b8fa017a12a108c87f540836e250

                  SHA1

                  1ac617fac131262b6d3ce1f52f5907e31d5f6f00

                  SHA256

                  6028bd681dbf11a0a58dde8a0cd884115c04caa59d080ba51bde1b086ce0079d

                  SHA512

                  507b2b8a8a168ff8f2bdafa5d9d341c44501a5f17d9f63f3d43bd586bc9e8ae33221887869fa86f845b7d067cb7d2a7009efd71dda36e03a40a74fee04b86856

                • memory/688-84-0x00000000011F0000-0x00000000011F1000-memory.dmp

                  Filesize

                  4KB

                • memory/828-131-0x0000000009530000-0x0000000009596000-memory.dmp

                  Filesize

                  408KB

                • memory/828-133-0x00000000071A0000-0x00000000071BE000-memory.dmp

                  Filesize

                  120KB

                • memory/828-124-0x0000000008750000-0x000000000878C000-memory.dmp

                  Filesize

                  240KB

                • memory/828-123-0x00000000086F0000-0x0000000008702000-memory.dmp

                  Filesize

                  72KB

                • memory/828-102-0x0000000000E60000-0x0000000000EC2000-memory.dmp

                  Filesize

                  392KB

                • memory/828-122-0x00000000087D0000-0x00000000088DA000-memory.dmp

                  Filesize

                  1.0MB

                • memory/828-103-0x0000000003370000-0x0000000003390000-memory.dmp

                  Filesize

                  128KB

                • memory/828-121-0x0000000008CA0000-0x00000000092B8000-memory.dmp

                  Filesize

                  6.1MB

                • memory/828-132-0x0000000009830000-0x00000000098A6000-memory.dmp

                  Filesize

                  472KB

                • memory/828-125-0x00000000088E0000-0x000000000892C000-memory.dmp

                  Filesize

                  304KB

                • memory/828-106-0x0000000005920000-0x000000000592A000-memory.dmp

                  Filesize

                  40KB

                • memory/828-105-0x0000000005990000-0x0000000005A22000-memory.dmp

                  Filesize

                  584KB

                • memory/828-104-0x0000000006050000-0x00000000065F4000-memory.dmp

                  Filesize

                  5.6MB

                • memory/828-134-0x000000000ABF0000-0x000000000ADB2000-memory.dmp

                  Filesize

                  1.8MB

                • memory/828-135-0x000000000B2F0000-0x000000000B81C000-memory.dmp

                  Filesize

                  5.2MB

                • memory/828-101-0x0000000071F4E000-0x0000000071F4F000-memory.dmp

                  Filesize

                  4KB

                • memory/3016-0-0x0000000000900000-0x0000000000901000-memory.dmp

                  Filesize

                  4KB

                • memory/3148-40-0x0000000000400000-0x0000000000648000-memory.dmp

                  Filesize

                  2.3MB

                • memory/3148-30-0x0000000000400000-0x0000000000648000-memory.dmp

                  Filesize

                  2.3MB

                • memory/3148-1-0x0000000000400000-0x0000000000648000-memory.dmp

                  Filesize

                  2.3MB

                • memory/3148-5-0x0000000000400000-0x0000000000648000-memory.dmp

                  Filesize

                  2.3MB

                • memory/3148-3-0x0000000000400000-0x0000000000648000-memory.dmp

                  Filesize

                  2.3MB

                • memory/3148-19-0x0000000000400000-0x0000000000648000-memory.dmp

                  Filesize

                  2.3MB

                • memory/3148-20-0x0000000000400000-0x0000000000648000-memory.dmp

                  Filesize

                  2.3MB

                • memory/3148-119-0x0000000000400000-0x0000000000648000-memory.dmp

                  Filesize

                  2.3MB

                • memory/3148-120-0x0000000000400000-0x0000000000648000-memory.dmp

                  Filesize

                  2.3MB

                • memory/3148-63-0x0000000000400000-0x0000000000648000-memory.dmp

                  Filesize

                  2.3MB

                • memory/3148-56-0x0000000000400000-0x0000000000648000-memory.dmp

                  Filesize

                  2.3MB

                • memory/3148-39-0x0000000000400000-0x0000000000648000-memory.dmp

                  Filesize

                  2.3MB

                • memory/3148-31-0x0000000000400000-0x0000000000648000-memory.dmp

                  Filesize

                  2.3MB

                • memory/3148-22-0x0000000019760000-0x00000000199BF000-memory.dmp

                  Filesize

                  2.4MB

                • memory/3336-86-0x0000000000400000-0x0000000000596000-memory.dmp

                  Filesize

                  1.6MB

                • memory/3336-83-0x0000000000400000-0x0000000000596000-memory.dmp

                  Filesize

                  1.6MB

                • memory/3336-85-0x0000000000400000-0x0000000000596000-memory.dmp

                  Filesize

                  1.6MB

                • memory/3336-88-0x0000000000400000-0x0000000000596000-memory.dmp

                  Filesize

                  1.6MB

                • memory/3796-118-0x0000000000400000-0x0000000000454000-memory.dmp

                  Filesize

                  336KB

                • memory/3796-117-0x0000000000400000-0x0000000000454000-memory.dmp

                  Filesize

                  336KB