Resubmissions

10-04-2024 02:52

240410-dcqxlaff2v 10

10-04-2024 02:52

240410-dcqltscc72 10

10-04-2024 02:51

240410-dcm6pscc67 10

10-04-2024 02:51

240410-dcmj6scc66 10

14-10-2023 04:10

231014-erhp7sga6y 10

Analysis

  • max time kernel
    596s
  • max time network
    600s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240214-en
  • resource tags

    arch:x64arch:x86image:win11-20240214-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    10-04-2024 02:51

General

  • Target

    f21559ac7c67d871d4f05.exe

  • Size

    327KB

  • MD5

    78fd6df30f791c7b5f45dca0b4c952a5

  • SHA1

    d977ca82da0850eb5d4e69c9c657d1a41fb9c44d

  • SHA256

    dba8f020ac6d09728422932492657fea3f0a95754cd279f5a949b6982bd32129

  • SHA512

    abf0efb2412c522fbb7f6725a548e8d6a8bc045801a4dd8652a544a1527b99647140ad4843c41a6b00a728a5d8361c7e2ea80eba8ee3b291238729277dad228d

  • SSDEEP

    6144:Vc6sWfGY/yODx332tOIXlU1QWZxXAnuHW9bbGDwVdqe1mM:Ps+CXIAuGG8dA

Malware Config

Extracted

Family

gurcu

C2

https://api.telegram.org/bot5968091729:AAHVag_ncx5c5AIYERGTqv9kr7clJT1_HDU/sendMessage?chat_id=-1001962300376

Signatures

  • Gurcu, WhiteSnake

    Gurcu is a malware stealer written in C#.

  • Executes dropped EXE 20 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
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • 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 32 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\f21559ac7c67d871d4f05.exe
    "C:\Users\Admin\AppData\Local\Temp\f21559ac7c67d871d4f05.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4896
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "f21559ac7c67d871d4f05" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\f21559ac7c67d871d4f05.exe" &&START "" "C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2600
      • C:\Windows\system32\chcp.com
        chcp 65001
        3⤵
          PID:3964
        • C:\Windows\system32\PING.EXE
          ping 127.0.0.1
          3⤵
          • Runs ping.exe
          PID:4616
        • C:\Windows\system32\schtasks.exe
          schtasks /create /tn "f21559ac7c67d871d4f05" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe" /rl HIGHEST /f
          3⤵
          • Creates scheduled task(s)
          PID:3700
        • C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe
          "C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe"
          3⤵
          • 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:3608
          • C:\Windows\System32\tar.exe
            "C:\Windows\System32\tar.exe" -xvzf "C:\Users\Admin\AppData\Local\Temp\tmp568C.tmp" -C "C:\Users\Admin\AppData\Local\z1jp774dks"
            4⤵
              PID:2428
            • C:\Users\Admin\AppData\Local\z1jp774dks\tor\tor.exe
              "C:\Users\Admin\AppData\Local\z1jp774dks\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\z1jp774dks\torrc.txt"
              4⤵
              • Executes dropped EXE
              PID:3344
      • C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe
        C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe
        1⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3556
        • C:\Users\Admin\AppData\Local\z1jp774dks\tor\tor.exe
          "C:\Users\Admin\AppData\Local\z1jp774dks\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\z1jp774dks\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:1540
      • C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe
        C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe
        1⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2024
        • C:\Users\Admin\AppData\Local\z1jp774dks\tor\tor.exe
          "C:\Users\Admin\AppData\Local\z1jp774dks\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\z1jp774dks\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:4752
      • C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe
        C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe
        1⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:444
        • C:\Users\Admin\AppData\Local\z1jp774dks\tor\tor.exe
          "C:\Users\Admin\AppData\Local\z1jp774dks\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\z1jp774dks\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:2704
      • C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe
        C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe
        1⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:472
        • C:\Users\Admin\AppData\Local\z1jp774dks\tor\tor.exe
          "C:\Users\Admin\AppData\Local\z1jp774dks\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\z1jp774dks\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:2532
      • C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe
        C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe
        1⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3440
        • C:\Users\Admin\AppData\Local\z1jp774dks\tor\tor.exe
          "C:\Users\Admin\AppData\Local\z1jp774dks\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\z1jp774dks\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:2512
      • C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe
        C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe
        1⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1628
        • C:\Users\Admin\AppData\Local\z1jp774dks\tor\tor.exe
          "C:\Users\Admin\AppData\Local\z1jp774dks\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\z1jp774dks\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:2968
      • C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe
        C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe
        1⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2652
        • C:\Users\Admin\AppData\Local\z1jp774dks\tor\tor.exe
          "C:\Users\Admin\AppData\Local\z1jp774dks\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\z1jp774dks\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:3340
      • C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe
        C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe
        1⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2888
        • C:\Users\Admin\AppData\Local\z1jp774dks\tor\tor.exe
          "C:\Users\Admin\AppData\Local\z1jp774dks\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\z1jp774dks\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:3316
      • C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe
        C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe
        1⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1572
        • C:\Users\Admin\AppData\Local\z1jp774dks\tor\tor.exe
          "C:\Users\Admin\AppData\Local\z1jp774dks\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\z1jp774dks\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:2236

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\f21559ac7c67d871d4f05.exe.log

        Filesize

        847B

        MD5

        486ebddc86ea8b3e965d390d22283a23

        SHA1

        eaffc047f067084867e8575c576a9ec60e094ba8

        SHA256

        50a57273ecb794e53b0622eb841341e2643c11f53fa47356e6e754ab2268171d

        SHA512

        0a50ba02250b38355a6f4fb94e40c61258a74031d9aea7cdf675f3e068f39ec0748ecf292aaf2f94b1963b9d66516ee79aa6c552617048e248774af0ff07189d

      • C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe

        Filesize

        327KB

        MD5

        78fd6df30f791c7b5f45dca0b4c952a5

        SHA1

        d977ca82da0850eb5d4e69c9c657d1a41fb9c44d

        SHA256

        dba8f020ac6d09728422932492657fea3f0a95754cd279f5a949b6982bd32129

        SHA512

        abf0efb2412c522fbb7f6725a548e8d6a8bc045801a4dd8652a544a1527b99647140ad4843c41a6b00a728a5d8361c7e2ea80eba8ee3b291238729277dad228d

      • C:\Users\Admin\AppData\Local\Temp\tmp568C.tmp

        Filesize

        13.3MB

        MD5

        89d2d5811c1aff539bb355f15f3ddad0

        SHA1

        5bb3577c25b6d323d927200c48cd184a3e27c873

        SHA256

        b630008f6d3887793d48b87091e56691e292894dd4fa100dc4a418a2f29dcc12

        SHA512

        39e576124c54143520c5435a2ef9b24506131e13403489c0692f09b89135015d611c4988d4772f8a1e6557fa68b4667d467334461009cee8c2227dfc3e295289

      • C:\Users\Admin\AppData\Local\z1jp774dks\data\cached-certs

        Filesize

        18KB

        MD5

        6bbe92fbb1fa08de15d5504703cd7081

        SHA1

        f0f4b88994913420d3a75e4c9daa894c7fee879c

        SHA256

        e58efd0eeb353d92b3fe8e47210d6ee898edbdc7ca2a3c7e6cf81ce2f454c328

        SHA512

        47044760cdeaceb3fcf5af121956454d613f92e2ced0a95e25dbe2cd825135e97603a721c6e53e50922b83b9bb7b2da2141f59cfd88f9e30bdbb69062e5b0b1b

      • C:\Users\Admin\AppData\Local\z1jp774dks\data\cached-microdesc-consensus

        Filesize

        2.7MB

        MD5

        a0db8a87f7b723266c8b04255da46b06

        SHA1

        4df00ea56d22d88f3d2e005ef66bad5b3ef92ebf

        SHA256

        60b43cdce0f807f7891521f396f53def34a7d98986dbde0faa2a197189c587f3

        SHA512

        41b8fc467d11af7ca6a42c7e94d1b8295ab3ae5d6d186b4f378e6e079440520e8324b695da1134beb2bc1697d2491edcc70c1b75ab6fc66b9c1cb2ecbcdb4a7d

      • C:\Users\Admin\AppData\Local\z1jp774dks\data\cached-microdescs.new

        Filesize

        8.0MB

        MD5

        b9644883785cacba48a07a96b8e92b82

        SHA1

        606a44c11fe693e4720447519093716a19db428a

        SHA256

        fed44984a6e9abc23f8c72aa797c64c9aa941fe03f2eeeec83764c24ebc518d2

        SHA512

        59eaeaf40458567be7f7c9e42045941f890e69afbc3578fdaeed8127091c6fd243f605507df6d2ea5d3a0617c3832533d322351c5cadcd4517e8ff10dd31a0a5

      • C:\Users\Admin\AppData\Local\z1jp774dks\host\hostname

        Filesize

        64B

        MD5

        336e8ba5a8f1a0bb3aa9377154d33a30

        SHA1

        c174b1728ef7188e472afc14baba2d3561480967

        SHA256

        e92a563fd5f5f19b3cda94bbe099be585117ae50e58e3e2580953da546e53020

        SHA512

        bde187187345be1c0293b2c38913d8846cc0d07ec49e5b94ecdfd7c9941a0eaf59ba712a58b13f3618b64abdffd501e3638792ac2162a56d1f901b8618ada0ee

      • C:\Users\Admin\AppData\Local\z1jp774dks\port.dat

        Filesize

        4B

        MD5

        51db672ac302a163017367f46d48f602

        SHA1

        9aeddcebb4a24fe955708691b2c71b62be4e2296

        SHA256

        44313a51f457afd48ad52fe8839cbf409da09c4c8ee84afac9030612ea42c502

        SHA512

        cad75ee6c11bcd04bc25c927c40e4c07be21dbaa31429559b56ac7d7917482c39c20a7524f330597c1423a5472c0d2e4e3137b098b8f7de173251344f4108a3a

      • C:\Users\Admin\AppData\Local\z1jp774dks\tor\tor.exe

        Filesize

        7.4MB

        MD5

        88590909765350c0d70c6c34b1f31dd2

        SHA1

        129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

        SHA256

        46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

        SHA512

        a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

      • C:\Users\Admin\AppData\Local\z1jp774dks\torrc.txt

        Filesize

        218B

        MD5

        555fa2e3986c423eb5c7135c6b7157a4

        SHA1

        1a2062d7d7039223150896db24f04c5a4f1c17a3

        SHA256

        a033e7939aef0f988f36f0b430926869d11bf010c4290710927eeeb80f3cb1ee

        SHA512

        c54c3fc37e9914f8729cf12a1b76054e4097a9d354b4fb096e471f439c1de950340bb2a285036dad323f839faa3f558026f97eb7a8c2e163c93d70c1c3ba291a

      • memory/444-108-0x00007FFB251F0000-0x00007FFB25CB2000-memory.dmp

        Filesize

        10.8MB

      • memory/444-106-0x00007FFB251F0000-0x00007FFB25CB2000-memory.dmp

        Filesize

        10.8MB

      • memory/472-110-0x00007FFB251F0000-0x00007FFB25CB2000-memory.dmp

        Filesize

        10.8MB

      • memory/472-112-0x00007FFB251F0000-0x00007FFB25CB2000-memory.dmp

        Filesize

        10.8MB

      • memory/1572-165-0x000001FA7BFA0000-0x000001FA7BFB0000-memory.dmp

        Filesize

        64KB

      • memory/1572-167-0x00007FFB251F0000-0x00007FFB25CB2000-memory.dmp

        Filesize

        10.8MB

      • memory/1572-164-0x00007FFB251F0000-0x00007FFB25CB2000-memory.dmp

        Filesize

        10.8MB

      • memory/1628-134-0x00007FFB251F0000-0x00007FFB25CB2000-memory.dmp

        Filesize

        10.8MB

      • memory/1628-136-0x00007FFB251F0000-0x00007FFB25CB2000-memory.dmp

        Filesize

        10.8MB

      • memory/2024-94-0x0000023077940000-0x0000023077950000-memory.dmp

        Filesize

        64KB

      • memory/2024-96-0x00007FFB251F0000-0x00007FFB25CB2000-memory.dmp

        Filesize

        10.8MB

      • memory/2024-93-0x00007FFB251F0000-0x00007FFB25CB2000-memory.dmp

        Filesize

        10.8MB

      • memory/2652-142-0x00007FFB251F0000-0x00007FFB25CB2000-memory.dmp

        Filesize

        10.8MB

      • memory/2652-143-0x000002896F8D0000-0x000002896F8E0000-memory.dmp

        Filesize

        64KB

      • memory/2652-145-0x00007FFB251F0000-0x00007FFB25CB2000-memory.dmp

        Filesize

        10.8MB

      • memory/2888-154-0x00007FFB251F0000-0x00007FFB25CB2000-memory.dmp

        Filesize

        10.8MB

      • memory/2888-152-0x00000205F7EF0000-0x00000205F7F00000-memory.dmp

        Filesize

        64KB

      • memory/2888-151-0x00007FFB251F0000-0x00007FFB25CB2000-memory.dmp

        Filesize

        10.8MB

      • memory/3440-122-0x00007FFB251F0000-0x00007FFB25CB2000-memory.dmp

        Filesize

        10.8MB

      • memory/3440-124-0x00007FFB251F0000-0x00007FFB25CB2000-memory.dmp

        Filesize

        10.8MB

      • memory/3556-75-0x00007FFB251F0000-0x00007FFB25CB2000-memory.dmp

        Filesize

        10.8MB

      • memory/3556-79-0x00007FFB251F0000-0x00007FFB25CB2000-memory.dmp

        Filesize

        10.8MB

      • memory/3556-76-0x00000280CB010000-0x00000280CB020000-memory.dmp

        Filesize

        64KB

      • memory/3608-11-0x00007FFB251F0000-0x00007FFB25CB2000-memory.dmp

        Filesize

        10.8MB

      • memory/3608-12-0x000001D1E3AD0000-0x000001D1E3AE0000-memory.dmp

        Filesize

        64KB

      • memory/3608-40-0x00007FFB251F0000-0x00007FFB25CB2000-memory.dmp

        Filesize

        10.8MB

      • memory/3608-41-0x000001D1E3AD0000-0x000001D1E3AE0000-memory.dmp

        Filesize

        64KB

      • memory/4896-1-0x00007FFB251F0000-0x00007FFB25CB2000-memory.dmp

        Filesize

        10.8MB

      • memory/4896-6-0x00007FFB251F0000-0x00007FFB25CB2000-memory.dmp

        Filesize

        10.8MB

      • memory/4896-2-0x0000017D54DE0000-0x0000017D54DF0000-memory.dmp

        Filesize

        64KB

      • memory/4896-0-0x0000017D3A6D0000-0x0000017D3A728000-memory.dmp

        Filesize

        352KB