Resubmissions

10-04-2024 02:17

240410-cqs4fafc2v 10

10-04-2024 02:17

240410-cqsgxabh56 10

10-04-2024 02:17

240410-cqrwdabh54 10

10-04-2024 02:17

240410-cqrklsbh53 10

13-05-2023 22:56

230513-2wtplahg95 10

Analysis

  • max time kernel
    597s
  • max time network
    602s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240221-en
  • resource tags

    arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    10-04-2024 02:17

General

  • Target

    qsteemp.exe

  • Size

    165KB

  • MD5

    90cd3202af31b431dcc5e47cf3b8c0d7

  • SHA1

    747f68fb8f122241059c219eeeeadac61e8215be

  • SHA256

    e76e206e8ae24f95a329b4f6ecdf1f22b76b07a8c628c0619b781bdba2d85732

  • SHA512

    b1025ca0dfa86cd6649337bfc6b555a9101fce38955566424955a6fe07782bea41eeaf4f233946eb6be5756b23398129bad98a87c6b07478f787df8bf3235481

  • SSDEEP

    3072:fV6h5WXwyNUD44ykiQbGjlc/SGvjQtbGTl2MRMc:9AuwMPkhbGRc/T6A

Score
10/10

Malware Config

Extracted

Family

gurcu

C2

https://api.telegram.org/bot6209822134:AAHQxD-CI1YDVcNbXijXHlonsEUgv3dfYtg/sendMessage?chat_id=-1001529292045

Signatures

  • Gurcu, WhiteSnake

    Gurcu is a malware stealer written in C#.

  • 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.

  • 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 11 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.

Processes

  • C:\Users\Admin\AppData\Local\Temp\qsteemp.exe
    "C:\Users\Admin\AppData\Local\Temp\qsteemp.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3144
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "qsteemp" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\qsteemp.exe" &&START "" "C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1564
      • C:\Windows\system32\chcp.com
        chcp 65001
        3⤵
          PID:704
        • C:\Windows\system32\PING.EXE
          ping 127.0.0.1
          3⤵
          • Runs ping.exe
          PID:4604
        • C:\Windows\system32\schtasks.exe
          schtasks /create /tn "qsteemp" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe" /rl HIGHEST /f
          3⤵
          • Creates scheduled task(s)
          PID:788
        • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
          "C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1728
          • C:\Windows\System32\tar.exe
            "C:\Windows\System32\tar.exe" -xvzf "C:\Users\Admin\AppData\Local\Temp\tmp829D.tmp" -C "C:\Users\Admin\AppData\Local\6kfrvwd31o"
            4⤵
              PID:768
            • C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe
              "C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\6kfrvwd31o\torrc.txt"
              4⤵
              • Executes dropped EXE
              PID:772
      • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        1⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3964
        • C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe
          "C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\6kfrvwd31o\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:4728
      • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        1⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2988
        • C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe
          "C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\6kfrvwd31o\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:3988
      • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        1⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1720
        • C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe
          "C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\6kfrvwd31o\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:4492
      • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        1⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:4872
        • C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe
          "C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\6kfrvwd31o\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:1488
      • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        1⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3856
        • C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe
          "C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\6kfrvwd31o\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:1392
      • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        1⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3688
        • C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe
          "C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\6kfrvwd31o\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:2492
      • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        1⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:4076
        • C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe
          "C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\6kfrvwd31o\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:4672
      • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        1⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2884
        • C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe
          "C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\6kfrvwd31o\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:4580
      • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        1⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2984
        • C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe
          "C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\6kfrvwd31o\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:248
      • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        1⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:4000
        • C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe
          "C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\6kfrvwd31o\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:2492

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\6kfrvwd31o\data\cached-microdesc-consensus

        Filesize

        2.7MB

        MD5

        a0db8a87f7b723266c8b04255da46b06

        SHA1

        4df00ea56d22d88f3d2e005ef66bad5b3ef92ebf

        SHA256

        60b43cdce0f807f7891521f396f53def34a7d98986dbde0faa2a197189c587f3

        SHA512

        41b8fc467d11af7ca6a42c7e94d1b8295ab3ae5d6d186b4f378e6e079440520e8324b695da1134beb2bc1697d2491edcc70c1b75ab6fc66b9c1cb2ecbcdb4a7d

      • C:\Users\Admin\AppData\Local\6kfrvwd31o\data\cached-microdescs.new

        Filesize

        15.4MB

        MD5

        0acec7668b2a3d34d985122ca103efb5

        SHA1

        b2173d27529dcd31432cfd7d4389b57fce33e868

        SHA256

        a6a03178717ea4b445ff58cb108d6098107047fc9d9724622351cb41bda9a6fb

        SHA512

        e19b2a8bd474072b532434e1cbbe40438a1e29759d8d1c99f3c8e4f292fe002a5006d531f036a31a05b5bcea4049dec854e17559e2939686e483328c6e80499e

      • C:\Users\Admin\AppData\Local\6kfrvwd31o\host\hostname

        Filesize

        64B

        MD5

        0b089118107ef41f9ed3d0c98a62eb02

        SHA1

        51e13363bca27a41557417b39ac1ac1ae5cdc792

        SHA256

        b0563eb1ec47485274ab69686c0278f2c0526ddd0b39af74412ec4d534f40cca

        SHA512

        c9482923d9b910ef566d9557119db28fccaf4f0cd83cca5a0631d0d6cc2720119ec7b1cb83747496d1a54b3d855ce583eaf554af63895729cee8d994bae57f6d

      • C:\Users\Admin\AppData\Local\6kfrvwd31o\port.dat

        Filesize

        4B

        MD5

        54e8912427a8d007ece906c577fdca60

        SHA1

        582b2f2037a08468f6eec8b90d25171c5475a4bb

        SHA256

        068cdb9d2f72bda16c5934741a093a9dbb698a816d56521feca9e5b67dbdbc40

        SHA512

        d42b0afb4d53938c6e9949adfff8697b90d97938682b726a26493bf6715524ef2fad768ef62d712dae310926655db8edcced11842d20459a0a3696fb9e1dbd3e

      • C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe

        Filesize

        7.4MB

        MD5

        88590909765350c0d70c6c34b1f31dd2

        SHA1

        129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

        SHA256

        46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

        SHA512

        a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

      • C:\Users\Admin\AppData\Local\6kfrvwd31o\torrc.txt

        Filesize

        218B

        MD5

        4d45b23c8ec5ff2b02734adc0a2c8d17

        SHA1

        ee4b1456af4dba81a4db056428b1ad319b0f0a9e

        SHA256

        ac9a149089394f3818c7fdd1d99fde50b05dd68122ef2ec27f7e646858f18d32

        SHA512

        467aa312e099e4e6af585b9d0250db41a52e8c69a172c992c84a3fb5ced92a026f224e6341004d2c68b4f6e73174e2d82274a688046276589709be527174f313

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

        Filesize

        1KB

        MD5

        081b644082c51f2ff0f00087877003b5

        SHA1

        2eeb0a8a592e5327873f5a6704031c1ff6d0bd31

        SHA256

        cc427c714517dd0a3c96354869ce1bb300bf4935006fc628ceb28e2f040197ac

        SHA512

        95621587e55a5f5111aea05cadbaf56429adde2de0c41c9de8e74c03d31116edf72b63d76f65af45e4b14b68fe214926425581f77113d332eb91b0b6a5598eff

      • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe

        Filesize

        165KB

        MD5

        90cd3202af31b431dcc5e47cf3b8c0d7

        SHA1

        747f68fb8f122241059c219eeeeadac61e8215be

        SHA256

        e76e206e8ae24f95a329b4f6ecdf1f22b76b07a8c628c0619b781bdba2d85732

        SHA512

        b1025ca0dfa86cd6649337bfc6b555a9101fce38955566424955a6fe07782bea41eeaf4f233946eb6be5756b23398129bad98a87c6b07478f787df8bf3235481

      • C:\Users\Admin\AppData\Local\Temp\tmp829D.tmp

        Filesize

        13.3MB

        MD5

        89d2d5811c1aff539bb355f15f3ddad0

        SHA1

        5bb3577c25b6d323d927200c48cd184a3e27c873

        SHA256

        b630008f6d3887793d48b87091e56691e292894dd4fa100dc4a418a2f29dcc12

        SHA512

        39e576124c54143520c5435a2ef9b24506131e13403489c0692f09b89135015d611c4988d4772f8a1e6557fa68b4667d467334461009cee8c2227dfc3e295289

      • memory/1720-101-0x00007FF900150000-0x00007FF900C12000-memory.dmp

        Filesize

        10.8MB

      • memory/1720-99-0x000001F559B60000-0x000001F559B70000-memory.dmp

        Filesize

        64KB

      • memory/1720-98-0x00007FF900150000-0x00007FF900C12000-memory.dmp

        Filesize

        10.8MB

      • memory/1728-12-0x000002479D320000-0x000002479D330000-memory.dmp

        Filesize

        64KB

      • memory/1728-11-0x00007FF900150000-0x00007FF900C12000-memory.dmp

        Filesize

        10.8MB

      • memory/1728-55-0x000002479D320000-0x000002479D330000-memory.dmp

        Filesize

        64KB

      • memory/1728-54-0x00007FF900150000-0x00007FF900C12000-memory.dmp

        Filesize

        10.8MB

      • memory/2884-146-0x0000014C42F10000-0x0000014C42F20000-memory.dmp

        Filesize

        64KB

      • memory/2884-148-0x00007FF900150000-0x00007FF900C12000-memory.dmp

        Filesize

        10.8MB

      • memory/2884-145-0x00007FF900150000-0x00007FF900C12000-memory.dmp

        Filesize

        10.8MB

      • memory/2984-154-0x00007FF900150000-0x00007FF900C12000-memory.dmp

        Filesize

        10.8MB

      • memory/2984-156-0x00007FF900150000-0x00007FF900C12000-memory.dmp

        Filesize

        10.8MB

      • memory/2988-90-0x00007FF900150000-0x00007FF900C12000-memory.dmp

        Filesize

        10.8MB

      • memory/2988-92-0x00007FF900150000-0x00007FF900C12000-memory.dmp

        Filesize

        10.8MB

      • memory/3144-0-0x000002543DD00000-0x000002543DD30000-memory.dmp

        Filesize

        192KB

      • memory/3144-1-0x00007FF900150000-0x00007FF900C12000-memory.dmp

        Filesize

        10.8MB

      • memory/3144-2-0x000002543FA30000-0x000002543FA40000-memory.dmp

        Filesize

        64KB

      • memory/3144-6-0x00007FF900150000-0x00007FF900C12000-memory.dmp

        Filesize

        10.8MB

      • memory/3688-127-0x00007FF900150000-0x00007FF900C12000-memory.dmp

        Filesize

        10.8MB

      • memory/3688-124-0x00007FF900150000-0x00007FF900C12000-memory.dmp

        Filesize

        10.8MB

      • memory/3688-125-0x00000244EA740000-0x00000244EA750000-memory.dmp

        Filesize

        64KB

      • memory/3856-114-0x00007FF900150000-0x00007FF900C12000-memory.dmp

        Filesize

        10.8MB

      • memory/3856-112-0x00007FF900150000-0x00007FF900C12000-memory.dmp

        Filesize

        10.8MB

      • memory/3964-53-0x00007FF900150000-0x00007FF900C12000-memory.dmp

        Filesize

        10.8MB

      • memory/3964-44-0x000001A0B7360000-0x000001A0B7370000-memory.dmp

        Filesize

        64KB

      • memory/3964-43-0x00007FF900150000-0x00007FF900C12000-memory.dmp

        Filesize

        10.8MB

      • memory/4000-168-0x00007FF900150000-0x00007FF900C12000-memory.dmp

        Filesize

        10.8MB

      • memory/4000-166-0x00007FF900150000-0x00007FF900C12000-memory.dmp

        Filesize

        10.8MB

      • memory/4076-139-0x00007FF900150000-0x00007FF900C12000-memory.dmp

        Filesize

        10.8MB

      • memory/4076-137-0x00007FF900150000-0x00007FF900C12000-memory.dmp

        Filesize

        10.8MB

      • memory/4872-107-0x00007FF900150000-0x00007FF900C12000-memory.dmp

        Filesize

        10.8MB

      • memory/4872-108-0x000001E0716B0000-0x000001E0716C0000-memory.dmp

        Filesize

        64KB

      • memory/4872-110-0x00007FF900150000-0x00007FF900C12000-memory.dmp

        Filesize

        10.8MB