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
    596s
  • max time network
    600s
  • 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 02:17

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#.

  • 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.

  • 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⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3524
    • 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:996
      • C:\Windows\system32\chcp.com
        chcp 65001
        3⤵
          PID:4028
        • C:\Windows\system32\PING.EXE
          ping 127.0.0.1
          3⤵
          • Runs ping.exe
          PID:3372
        • 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:3900
        • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
          "C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe"
          3⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1036
          • C:\Windows\System32\tar.exe
            "C:\Windows\System32\tar.exe" -xvzf "C:\Users\Admin\AppData\Local\Temp\tmp4A76.tmp" -C "C:\Users\Admin\AppData\Local\6kfrvwd31o"
            4⤵
              PID:1256
            • 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:1012
      • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        1⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:4236
        • 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:3176
      • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        1⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1512
        • 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:2328
      • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        1⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1240
        • 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:888
      • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        1⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2332
        • 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:4104
      • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        1⤵
        • Checks computer location settings
        • 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:3440
      • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        1⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2872
        • 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:2004
      • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        1⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3784
        • 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:2684
      • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        1⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1060
        • 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:436
      • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        1⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1420
        • 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:2636
      • C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
        1⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2248
        • 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:3764

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        2.7MB

        MD5

        814f8cba43d923834b0d0027591e52bf

        SHA1

        2814b4faa0221b252164fbf9586051c07faa050f

        SHA256

        406d96a4788b07a0c4bda0e289d04472bc92a13f3b5b51e7478d095986735597

        SHA512

        45d866ec699d731eb7a50669bfa2fb469652b92d92b4546d373777192bff9d2201095ec9e13079ff422b4a7a15175142aa7d2abb57aaf4262b3e837340677069

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

        Filesize

        5.9MB

        MD5

        d369c48be60e5980ab57eef4b93e1312

        SHA1

        ce62a47fa2c69315c2e677c834fd4e7dfe90bd76

        SHA256

        635af76a8cf7dc5c93c7210c25b844ad0f28308e7a027818d66bf4187fda4a90

        SHA512

        7ccb98ee8351309bb5da33bd786d54f390cb87845ad10ab673292f9db67e70f698f49222be36aafe73e7a77e77f19ea43bd654c9331888176199682f5d5a422f

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

        Filesize

        64B

        MD5

        842387aea4986ff2172ba33cccf1109e

        SHA1

        fadf9216396dc626edecf714e111d8b5128b2d6d

        SHA256

        4f572fc2d478355141db0cd64eca63bf56c6ad0c938b8c61f2014adcbd7cefea

        SHA512

        789cc9332e402e2dfb374810664b31cd85ef8816978a3c611447cb9dbd6f66b53e68d72cbcf781a8d554305681f3bf64542a35adebbc00cb0c2699811d257e58

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

        Filesize

        4B

        MD5

        584b98aac2dddf59ee2cf19ca4ccb75e

        SHA1

        a2cf0c49cd3c45689ff81c3b5701dea7c6f1e86d

        SHA256

        a5ae3f2dbbf72da099be343eabff98aae7ac71c6f71cf1f1583825c92fd085ba

        SHA512

        ce4641027d5b63b972ea5f3289881c85722b1a35ecaa26e7606ffb739628937b9c1c620f6f0369ce78b928b80e7963a64a2013d4ce306a1e39bc06f077f36d45

      • 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

        a3534ab550a847a62444d2ef6eb06778

        SHA1

        4855e7cd7993460b255d69fc3b0b945c6e28b040

        SHA256

        37be3149a2c1bf1a374ac4802e0fa0919a5a6fd3f83133712f08749805aa93fa

        SHA512

        bb4c7212b8be7c62f7db4f5eff887e92d9817bb17e57c4cf52571db563d3dce54ed747f9e5d7e7fe506eb7c2015df7bbe7d75e96e7739b6270c13bebd2d4169d

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

        Filesize

        1KB

        MD5

        fc1be6f3f52d5c841af91f8fc3f790cb

        SHA1

        ac79b4229e0a0ce378ae22fc6104748c5f234511

        SHA256

        6da862f7c7feffca99cd58712ece93928c6ca6aed617f5d8c10a4718eaa2a910

        SHA512

        2f46165017309ee1a0c1b23e30a71e52e86ad8933e2649bf58c3f4628c5aa75659f5b8f6be32c2882f220b2f3ff2fd50d8766bf0a3708c94c2c634c051a05ea6

      • 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\tmp4A76.tmp

        Filesize

        13.3MB

        MD5

        89d2d5811c1aff539bb355f15f3ddad0

        SHA1

        5bb3577c25b6d323d927200c48cd184a3e27c873

        SHA256

        b630008f6d3887793d48b87091e56691e292894dd4fa100dc4a418a2f29dcc12

        SHA512

        39e576124c54143520c5435a2ef9b24506131e13403489c0692f09b89135015d611c4988d4772f8a1e6557fa68b4667d467334461009cee8c2227dfc3e295289

      • memory/1036-11-0x00007FFED08C0000-0x00007FFED1381000-memory.dmp

        Filesize

        10.8MB

      • memory/1036-12-0x000002CDAE7B0000-0x000002CDAE7C0000-memory.dmp

        Filesize

        64KB

      • memory/1036-59-0x000002CDAE7B0000-0x000002CDAE7C0000-memory.dmp

        Filesize

        64KB

      • memory/1036-53-0x00007FFED08C0000-0x00007FFED1381000-memory.dmp

        Filesize

        10.8MB

      • memory/1060-140-0x00007FFED08C0000-0x00007FFED1381000-memory.dmp

        Filesize

        10.8MB

      • memory/1060-143-0x00007FFED08C0000-0x00007FFED1381000-memory.dmp

        Filesize

        10.8MB

      • memory/1060-141-0x0000026268B90000-0x0000026268BA0000-memory.dmp

        Filesize

        64KB

      • memory/1240-98-0x00007FFED08C0000-0x00007FFED1381000-memory.dmp

        Filesize

        10.8MB

      • memory/1240-100-0x00007FFED08C0000-0x00007FFED1381000-memory.dmp

        Filesize

        10.8MB

      • memory/1420-150-0x00000201F7AB0000-0x00000201F7AC0000-memory.dmp

        Filesize

        64KB

      • memory/1420-149-0x00007FFED08C0000-0x00007FFED1381000-memory.dmp

        Filesize

        10.8MB

      • memory/1420-152-0x00007FFED08C0000-0x00007FFED1381000-memory.dmp

        Filesize

        10.8MB

      • memory/1512-88-0x00007FFED08C0000-0x00007FFED1381000-memory.dmp

        Filesize

        10.8MB

      • memory/1512-86-0x0000017433C60000-0x0000017433C70000-memory.dmp

        Filesize

        64KB

      • memory/1512-85-0x00007FFED08C0000-0x00007FFED1381000-memory.dmp

        Filesize

        10.8MB

      • memory/2248-169-0x00007FFED08C0000-0x00007FFED1381000-memory.dmp

        Filesize

        10.8MB

      • memory/2248-166-0x00007FFED08C0000-0x00007FFED1381000-memory.dmp

        Filesize

        10.8MB

      • memory/2248-167-0x000001BB38530000-0x000001BB38540000-memory.dmp

        Filesize

        64KB

      • memory/2332-108-0x00007FFED08C0000-0x00007FFED1381000-memory.dmp

        Filesize

        10.8MB

      • memory/2332-106-0x00007FFED08C0000-0x00007FFED1381000-memory.dmp

        Filesize

        10.8MB

      • memory/2872-123-0x00007FFED08C0000-0x00007FFED1381000-memory.dmp

        Filesize

        10.8MB

      • memory/2872-125-0x00007FFED08C0000-0x00007FFED1381000-memory.dmp

        Filesize

        10.8MB

      • memory/2884-111-0x000001D5BDC80000-0x000001D5BDC90000-memory.dmp

        Filesize

        64KB

      • memory/2884-113-0x00007FFED08C0000-0x00007FFED1381000-memory.dmp

        Filesize

        10.8MB

      • memory/2884-110-0x00007FFED08C0000-0x00007FFED1381000-memory.dmp

        Filesize

        10.8MB

      • memory/3524-0-0x000002062BC80000-0x000002062BCB0000-memory.dmp

        Filesize

        192KB

      • memory/3524-6-0x00007FFED23C0000-0x00007FFED2E81000-memory.dmp

        Filesize

        10.8MB

      • memory/3524-1-0x00007FFED23C0000-0x00007FFED2E81000-memory.dmp

        Filesize

        10.8MB

      • memory/3524-2-0x000002062DBD0000-0x000002062DBE0000-memory.dmp

        Filesize

        64KB

      • memory/3784-131-0x00007FFED08C0000-0x00007FFED1381000-memory.dmp

        Filesize

        10.8MB

      • memory/3784-134-0x00007FFED08C0000-0x00007FFED1381000-memory.dmp

        Filesize

        10.8MB

      • memory/3784-132-0x00000200DD170000-0x00000200DD180000-memory.dmp

        Filesize

        64KB

      • memory/4236-55-0x000001D6516A0000-0x000001D6516B0000-memory.dmp

        Filesize

        64KB

      • memory/4236-54-0x00007FFED08C0000-0x00007FFED1381000-memory.dmp

        Filesize

        10.8MB

      • memory/4236-58-0x00007FFED08C0000-0x00007FFED1381000-memory.dmp

        Filesize

        10.8MB