Resubmissions

10-04-2024 02:41

240410-c6hmmsfd7z 10

10-04-2024 02:41

240410-c6g14scb46 10

10-04-2024 02:41

240410-c6gqcacb45 10

10-04-2024 02:41

240410-c6f4tacb44 10

14-10-2023 01:33

231014-bysbfahh6s 10

Analysis

  • max time kernel
    593s
  • max time network
    598s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    10-04-2024 02:41

General

  • Target

    x19a4f9f3d16fcc9779ba8ea79bf7.exe

  • Size

    392KB

  • MD5

    2299a17350433284e58bd0fcc10edf41

  • SHA1

    d477f1cd55365db00ca77cc5459afabe1ffc80b3

  • SHA256

    c3439dd56bcf3921cdbfcbdff3f928d14ebd632b3411235657bf9f5452c1ab9d

  • SHA512

    123d18cf17b4bb0f0b16414039c2381f77e9f12c96a109d5847c760e4d7fb64f6c592f8f185a4c0375aade6754afd0abd6a196936adac405290f157829ae25a1

  • SSDEEP

    6144:5cJGLvLE5hu6Me646G0D1ecme1x9b31v4n:uUvLr6k9b5ecmed1v4

Malware Config

Extracted

Family

gurcu

C2

https://api.telegram.org/bot6193093056:AAHzyNGUGS9aUG6CCx6ENLoXpCFLzEQywIQ/sendMessage?chat_id=1098292643

Signatures

  • Gurcu, WhiteSnake

    Gurcu is a malware stealer written in C#.

  • Checks computer location settings 2 TTPs 12 IoCs

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

  • Executes dropped EXE 22 IoCs
  • Reads WinSCP keys stored on the system 2 TTPs

    Tries to access WinSCP stored sessions.

  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 12 IoCs
  • Suspicious use of WriteProcessMemory 34 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\x19a4f9f3d16fcc9779ba8ea79bf7.exe
    "C:\Users\Admin\AppData\Local\Temp\x19a4f9f3d16fcc9779ba8ea79bf7.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4500
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "x19a4f9f3d16fcc9779ba8ea79bf7" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\x19a4f9f3d16fcc9779ba8ea79bf7.exe" &&START "" "C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2432
      • C:\Windows\system32\chcp.com
        chcp 65001
        3⤵
          PID:4460
        • C:\Windows\system32\PING.EXE
          ping 127.0.0.1
          3⤵
          • Runs ping.exe
          PID:2608
        • C:\Windows\system32\schtasks.exe
          schtasks /create /tn "x19a4f9f3d16fcc9779ba8ea79bf7" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe" /rl HIGHEST /f
          3⤵
          • Creates scheduled task(s)
          PID:4592
        • C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
          "C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe"
          3⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Accesses Microsoft Outlook profiles
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          • outlook_office_path
          • outlook_win_path
          PID:4908
          • C:\Windows\System32\tar.exe
            "C:\Windows\System32\tar.exe" -xvzf "C:\Users\Admin\AppData\Local\Temp\tmp52C3.tmp" -C "C:\Users\Admin\AppData\Local\xtioxntk7k"
            4⤵
              PID:5096
            • C:\Users\Admin\AppData\Local\xtioxntk7k\tor\tor.exe
              "C:\Users\Admin\AppData\Local\xtioxntk7k\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\xtioxntk7k\torrc.txt"
              4⤵
              • Executes dropped EXE
              PID:4364
      • C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
        C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
        1⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:4828
        • C:\Users\Admin\AppData\Local\xtioxntk7k\tor\tor.exe
          "C:\Users\Admin\AppData\Local\xtioxntk7k\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\xtioxntk7k\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:3940
      • C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
        C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
        1⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1984
        • C:\Users\Admin\AppData\Local\xtioxntk7k\tor\tor.exe
          "C:\Users\Admin\AppData\Local\xtioxntk7k\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\xtioxntk7k\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:3864
      • C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
        C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
        1⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3112
        • C:\Users\Admin\AppData\Local\xtioxntk7k\tor\tor.exe
          "C:\Users\Admin\AppData\Local\xtioxntk7k\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\xtioxntk7k\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:964
      • C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
        C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
        1⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:536
        • C:\Users\Admin\AppData\Local\xtioxntk7k\tor\tor.exe
          "C:\Users\Admin\AppData\Local\xtioxntk7k\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\xtioxntk7k\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:4736
      • C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
        C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
        1⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1464
        • C:\Users\Admin\AppData\Local\xtioxntk7k\tor\tor.exe
          "C:\Users\Admin\AppData\Local\xtioxntk7k\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\xtioxntk7k\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:3612
      • C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
        C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
        1⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3344
        • C:\Users\Admin\AppData\Local\xtioxntk7k\tor\tor.exe
          "C:\Users\Admin\AppData\Local\xtioxntk7k\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\xtioxntk7k\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:4976
      • C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
        C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
        1⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:4592
        • C:\Users\Admin\AppData\Local\xtioxntk7k\tor\tor.exe
          "C:\Users\Admin\AppData\Local\xtioxntk7k\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\xtioxntk7k\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:3228
      • C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
        C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
        1⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:5092
        • C:\Users\Admin\AppData\Local\xtioxntk7k\tor\tor.exe
          "C:\Users\Admin\AppData\Local\xtioxntk7k\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\xtioxntk7k\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:2276
      • C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
        C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
        1⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:4372
        • C:\Users\Admin\AppData\Local\xtioxntk7k\tor\tor.exe
          "C:\Users\Admin\AppData\Local\xtioxntk7k\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\xtioxntk7k\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:3244
      • C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
        C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
        1⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3732
        • C:\Users\Admin\AppData\Local\xtioxntk7k\tor\tor.exe
          "C:\Users\Admin\AppData\Local\xtioxntk7k\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\xtioxntk7k\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:1428

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\x19a4f9f3d16fcc9779ba8ea79bf7.exe.log

        Filesize

        847B

        MD5

        3308a84a40841fab7dfec198b3c31af7

        SHA1

        4e7ab6336c0538be5dd7da529c0265b3b6523083

        SHA256

        169bc31a8d1666535977ca170d246a463e6531bb21faab6c48cb4269d9d60b2e

        SHA512

        97521d5fb94efdc836ea2723098a1f26a7589a76af51358eee17292d29c9325baf53ad6b4496c5ca3e208d1c9b9ad6797a370e2ae378072fc68f5d6e8b73b198

      • C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe

        Filesize

        392KB

        MD5

        2299a17350433284e58bd0fcc10edf41

        SHA1

        d477f1cd55365db00ca77cc5459afabe1ffc80b3

        SHA256

        c3439dd56bcf3921cdbfcbdff3f928d14ebd632b3411235657bf9f5452c1ab9d

        SHA512

        123d18cf17b4bb0f0b16414039c2381f77e9f12c96a109d5847c760e4d7fb64f6c592f8f185a4c0375aade6754afd0abd6a196936adac405290f157829ae25a1

      • C:\Users\Admin\AppData\Local\Temp\tmp52C3.tmp

        Filesize

        13.3MB

        MD5

        89d2d5811c1aff539bb355f15f3ddad0

        SHA1

        5bb3577c25b6d323d927200c48cd184a3e27c873

        SHA256

        b630008f6d3887793d48b87091e56691e292894dd4fa100dc4a418a2f29dcc12

        SHA512

        39e576124c54143520c5435a2ef9b24506131e13403489c0692f09b89135015d611c4988d4772f8a1e6557fa68b4667d467334461009cee8c2227dfc3e295289

      • C:\Users\Admin\AppData\Local\xtioxntk7k\data\cached-certs

        Filesize

        18KB

        MD5

        7195712969b21a081d34607126113068

        SHA1

        737ce76b11bbaac1bfa6c41bfe18a88a4514e234

        SHA256

        2a81d8dc15beebe0beedee7564272004a0eee1522d8d14f3e42b1e7704a79d44

        SHA512

        66a12083120173f4791a1d5333c09a98fd6e5b98434523b856f7e2429395707000c1515b49252c199fe978ab5442743e0e38882aaeacaa24cea70d5c1384e2a0

      • C:\Users\Admin\AppData\Local\xtioxntk7k\data\cached-microdesc-consensus.tmp

        Filesize

        2.7MB

        MD5

        a0db8a87f7b723266c8b04255da46b06

        SHA1

        4df00ea56d22d88f3d2e005ef66bad5b3ef92ebf

        SHA256

        60b43cdce0f807f7891521f396f53def34a7d98986dbde0faa2a197189c587f3

        SHA512

        41b8fc467d11af7ca6a42c7e94d1b8295ab3ae5d6d186b4f378e6e079440520e8324b695da1134beb2bc1697d2491edcc70c1b75ab6fc66b9c1cb2ecbcdb4a7d

      • C:\Users\Admin\AppData\Local\xtioxntk7k\data\cached-microdescs.new

        Filesize

        7.2MB

        MD5

        48d10437efde97174bb6db0dd5485226

        SHA1

        75a5d29bcefd7b8cf8d75553963a2460407e1a51

        SHA256

        4bed2d018b8e4327b8d419016eb4c2f1adbcde58b4080bee6cab44ed443a5e37

        SHA512

        c9113a072b80e719c60a8eec4e0c1db6d25d8f4c04ed054e46eb2401d083575c84e826acfcc33e153ebe9f3f1aad1ae9c85e2389e3d3682c1057d8015aff7527

      • C:\Users\Admin\AppData\Local\xtioxntk7k\host\hostname

        Filesize

        64B

        MD5

        09c9b86472f9a91e944772e4f72261b1

        SHA1

        1f9aa64710e3de10e76322c4053a206df99e215d

        SHA256

        852d99db33fd5071e22b6b656905a7194219f7817473ea8df50c3bd0f76df026

        SHA512

        0857ea4afee32f27ed0b20fc4d6c6fde32f00d5bc72dc98fbcc4a8b70140e184997aa77b8c8ea1feabfa5316e6e83146d54165a295b41177f7e5152da7ce1579

      • C:\Users\Admin\AppData\Local\xtioxntk7k\port.dat

        Filesize

        4B

        MD5

        30f48cd3c7e73511070b95ee0a884c23

        SHA1

        97d28a9f0da27d11b7fc74d21f7fa0f5f279f21e

        SHA256

        a2b6103a90e7178ea29afa2a5e4d0fd98a71e75ac5c0a98ca166327a8814a6fb

        SHA512

        b53add15fe32d2afab89291ac483df680d0f4c1deb0134ccebe6d05c755339ec7c95649b7034f64d23898f8eb7e4bf971e01c84969c2adde3543842f4a99ea74

      • C:\Users\Admin\AppData\Local\xtioxntk7k\tor\tor.exe

        Filesize

        7.4MB

        MD5

        88590909765350c0d70c6c34b1f31dd2

        SHA1

        129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

        SHA256

        46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

        SHA512

        a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

      • C:\Users\Admin\AppData\Local\xtioxntk7k\torrc.txt

        Filesize

        218B

        MD5

        4951df203bd8717e1018448c8097215a

        SHA1

        0d7b0753238e335a98e385b904df8267393bf4de

        SHA256

        31933488b02ac705285a18fefd458ce59b92274aee20e8d98998434739c9646e

        SHA512

        b000924f02c50ab2f18167b877252f04b0099844aac4b9ade54ebe18e061c8a1248c5d35cb62cc9cc09436d94e4aab5cdb08e39b0a3677835c36970822b2f3b2

      • memory/536-108-0x00007FF873500000-0x00007FF873FC1000-memory.dmp

        Filesize

        10.8MB

      • memory/536-106-0x00007FF873500000-0x00007FF873FC1000-memory.dmp

        Filesize

        10.8MB

      • memory/1464-118-0x00007FF873500000-0x00007FF873FC1000-memory.dmp

        Filesize

        10.8MB

      • memory/1464-119-0x000002A4F0500000-0x000002A4F0510000-memory.dmp

        Filesize

        64KB

      • memory/1464-121-0x00007FF873500000-0x00007FF873FC1000-memory.dmp

        Filesize

        10.8MB

      • memory/1984-94-0x000001A7E9ED0000-0x000001A7E9EE0000-memory.dmp

        Filesize

        64KB

      • memory/1984-93-0x00007FF873500000-0x00007FF873FC1000-memory.dmp

        Filesize

        10.8MB

      • memory/1984-96-0x00007FF873500000-0x00007FF873FC1000-memory.dmp

        Filesize

        10.8MB

      • memory/3112-102-0x00007FF873500000-0x00007FF873FC1000-memory.dmp

        Filesize

        10.8MB

      • memory/3112-104-0x00007FF873500000-0x00007FF873FC1000-memory.dmp

        Filesize

        10.8MB

      • memory/3344-131-0x00007FF873500000-0x00007FF873FC1000-memory.dmp

        Filesize

        10.8MB

      • memory/3344-134-0x00007FF873500000-0x00007FF873FC1000-memory.dmp

        Filesize

        10.8MB

      • memory/3344-132-0x00000197A26F0000-0x00000197A2700000-memory.dmp

        Filesize

        64KB

      • memory/3732-172-0x00007FF873500000-0x00007FF873FC1000-memory.dmp

        Filesize

        10.8MB

      • memory/3732-170-0x00007FF873500000-0x00007FF873FC1000-memory.dmp

        Filesize

        10.8MB

      • memory/4372-164-0x00007FF873500000-0x00007FF873FC1000-memory.dmp

        Filesize

        10.8MB

      • memory/4372-162-0x000001B09C9B0000-0x000001B09C9C0000-memory.dmp

        Filesize

        64KB

      • memory/4372-161-0x00007FF873500000-0x00007FF873FC1000-memory.dmp

        Filesize

        10.8MB

      • memory/4500-1-0x00007FF873F20000-0x00007FF8749E1000-memory.dmp

        Filesize

        10.8MB

      • memory/4500-0-0x000001ADA33D0000-0x000001ADA3438000-memory.dmp

        Filesize

        416KB

      • memory/4500-6-0x00007FF873F20000-0x00007FF8749E1000-memory.dmp

        Filesize

        10.8MB

      • memory/4500-2-0x000001ADBD990000-0x000001ADBD9A0000-memory.dmp

        Filesize

        64KB

      • memory/4592-136-0x00007FF873500000-0x00007FF873FC1000-memory.dmp

        Filesize

        10.8MB

      • memory/4592-138-0x00007FF873500000-0x00007FF873FC1000-memory.dmp

        Filesize

        10.8MB

      • memory/4828-79-0x00007FF873500000-0x00007FF873FC1000-memory.dmp

        Filesize

        10.8MB

      • memory/4828-80-0x000001C9C5480000-0x000001C9C5490000-memory.dmp

        Filesize

        64KB

      • memory/4828-83-0x00007FF873500000-0x00007FF873FC1000-memory.dmp

        Filesize

        10.8MB

      • memory/4908-11-0x00007FF873500000-0x00007FF873FC1000-memory.dmp

        Filesize

        10.8MB

      • memory/4908-68-0x00007FF873500000-0x00007FF873FC1000-memory.dmp

        Filesize

        10.8MB

      • memory/4908-12-0x0000023B35B20000-0x0000023B35B30000-memory.dmp

        Filesize

        64KB

      • memory/4908-73-0x0000023B35B20000-0x0000023B35B30000-memory.dmp

        Filesize

        64KB

      • memory/5092-147-0x00007FF873500000-0x00007FF873FC1000-memory.dmp

        Filesize

        10.8MB

      • memory/5092-145-0x000002481BA20000-0x000002481BA30000-memory.dmp

        Filesize

        64KB

      • memory/5092-144-0x00007FF873500000-0x00007FF873FC1000-memory.dmp

        Filesize

        10.8MB