Analysis

  • max time kernel
    119s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    22/01/2025, 19:28

General

  • Target

    620ebdda751738d4c95cb793fbcda971e6cd1dcf082f0da63848c55ed68d1051.exe

  • Size

    2.0MB

  • MD5

    10ff87f8fabc6154f9a370f7fd17f928

  • SHA1

    8dcfbb5f1793861d917c38d77b241f2c73f7344b

  • SHA256

    620ebdda751738d4c95cb793fbcda971e6cd1dcf082f0da63848c55ed68d1051

  • SHA512

    e7ca4a43bf8eb6fd06d180d7d4befb42887020f626c088616627f35362fb549689594a0425deb86a778067ae102219cb299677d6802ddcc8d555da9032a9bf9e

  • SSDEEP

    24576:YIWvTgWtxIEUy/N3VfEj2kiGJrgnhU66dtZyXSt1Q65bNAJO4f6/NJmlEUDAS9gm:YIWTxhVG7ohU665Y0JbNm8mkjYLyu

Malware Config

Signatures

  • DcRat

    DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

  • Dcrat family
  • Process spawned unexpected child process 18 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of web browsers 3 TTPs

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

  • Drops file in Program Files directory 5 IoCs
  • Drops file in Windows directory 1 IoCs
  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Enumerates physical storage devices 1 TTPs

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

  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • Runs ping.exe 1 TTPs 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 18 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 12 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\620ebdda751738d4c95cb793fbcda971e6cd1dcf082f0da63848c55ed68d1051.exe
    "C:\Users\Admin\AppData\Local\Temp\620ebdda751738d4c95cb793fbcda971e6cd1dcf082f0da63848c55ed68d1051.exe"
    1⤵
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1416
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\0TmkGOr7g5.bat"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3020
      • C:\Windows\system32\chcp.com
        chcp 65001
        3⤵
          PID:2092
        • C:\Windows\system32\PING.EXE
          ping -n 10 localhost
          3⤵
          • System Network Configuration Discovery: Internet Connection Discovery
          • Runs ping.exe
          PID:1920
        • C:\Recovery\1f276ee2-69f6-11ef-8b31-62cb582c238c\OSPPSVC.exe
          "C:\Recovery\1f276ee2-69f6-11ef-8b31-62cb582c238c\OSPPSVC.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious use of AdjustPrivilegeToken
          PID:1052
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 9 /tr "'C:\MSOCache\All Users\csrss.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2952
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\MSOCache\All Users\csrss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3000
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 13 /tr "'C:\MSOCache\All Users\csrss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2720
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 13 /tr "'C:\Recovery\1f276ee2-69f6-11ef-8b31-62cb582c238c\csrss.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2612
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Recovery\1f276ee2-69f6-11ef-8b31-62cb582c238c\csrss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2684
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 6 /tr "'C:\Recovery\1f276ee2-69f6-11ef-8b31-62cb582c238c\csrss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2360
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "OSPPSVCO" /sc MINUTE /mo 9 /tr "'C:\Recovery\1f276ee2-69f6-11ef-8b31-62cb582c238c\OSPPSVC.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1480
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "OSPPSVC" /sc ONLOGON /tr "'C:\Recovery\1f276ee2-69f6-11ef-8b31-62cb582c238c\OSPPSVC.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:776
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "OSPPSVCO" /sc MINUTE /mo 9 /tr "'C:\Recovery\1f276ee2-69f6-11ef-8b31-62cb582c238c\OSPPSVC.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1380
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 8 /tr "'C:\Program Files\Windows Sidebar\ja-JP\spoolsv.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1444
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Program Files\Windows Sidebar\ja-JP\spoolsv.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2820
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 14 /tr "'C:\Program Files\Windows Sidebar\ja-JP\spoolsv.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2916
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Google\Temp\sppsvc.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2348
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Program Files (x86)\Google\Temp\sppsvc.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2668
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\Google\Temp\sppsvc.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2788
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "620ebdda751738d4c95cb793fbcda971e6cd1dcf082f0da63848c55ed68d10516" /sc MINUTE /mo 6 /tr "'C:\Users\Admin\AppData\Local\Temp\620ebdda751738d4c95cb793fbcda971e6cd1dcf082f0da63848c55ed68d1051.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1728
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "620ebdda751738d4c95cb793fbcda971e6cd1dcf082f0da63848c55ed68d1051" /sc ONLOGON /tr "'C:\Users\Admin\AppData\Local\Temp\620ebdda751738d4c95cb793fbcda971e6cd1dcf082f0da63848c55ed68d1051.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1584
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "620ebdda751738d4c95cb793fbcda971e6cd1dcf082f0da63848c55ed68d10516" /sc MINUTE /mo 13 /tr "'C:\Users\Admin\AppData\Local\Temp\620ebdda751738d4c95cb793fbcda971e6cd1dcf082f0da63848c55ed68d1051.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1760

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\MSOCache\All Users\csrss.exe

      Filesize

      2.0MB

      MD5

      10ff87f8fabc6154f9a370f7fd17f928

      SHA1

      8dcfbb5f1793861d917c38d77b241f2c73f7344b

      SHA256

      620ebdda751738d4c95cb793fbcda971e6cd1dcf082f0da63848c55ed68d1051

      SHA512

      e7ca4a43bf8eb6fd06d180d7d4befb42887020f626c088616627f35362fb549689594a0425deb86a778067ae102219cb299677d6802ddcc8d555da9032a9bf9e

    • C:\Users\Admin\AppData\Local\Temp\0TmkGOr7g5.bat

      Filesize

      188B

      MD5

      2c37421066c951752d5a7dd7b9889e0b

      SHA1

      83545a1e36236b3ba93d60618cc24d1622371ebe

      SHA256

      54f146b7392e3d10ef0bc61c84f67325e9444aac97ae6768c4bca0201cc44a27

      SHA512

      dc8db45a84e2342a22907423fee4d566e302516c6528f77cd483ccece82b74dab9fccabb6d480934ecc1c5c1deb564a30b320ec32097a4390fb1290fbd9298c3

    • memory/1052-49-0x00000000009A0000-0x0000000000B9E000-memory.dmp

      Filesize

      2.0MB

    • memory/1416-21-0x0000000000660000-0x000000000066C000-memory.dmp

      Filesize

      48KB

    • memory/1416-27-0x000007FEF5720000-0x000007FEF610C000-memory.dmp

      Filesize

      9.9MB

    • memory/1416-6-0x0000000000480000-0x000000000048E000-memory.dmp

      Filesize

      56KB

    • memory/1416-9-0x000007FEF5720000-0x000007FEF610C000-memory.dmp

      Filesize

      9.9MB

    • memory/1416-8-0x00000000004B0000-0x00000000004CC000-memory.dmp

      Filesize

      112KB

    • memory/1416-12-0x000007FEF5720000-0x000007FEF610C000-memory.dmp

      Filesize

      9.9MB

    • memory/1416-11-0x00000000006F0000-0x0000000000708000-memory.dmp

      Filesize

      96KB

    • memory/1416-17-0x000007FEF5720000-0x000007FEF610C000-memory.dmp

      Filesize

      9.9MB

    • memory/1416-22-0x000007FEF5720000-0x000007FEF610C000-memory.dmp

      Filesize

      9.9MB

    • memory/1416-0-0x000007FEF5723000-0x000007FEF5724000-memory.dmp

      Filesize

      4KB

    • memory/1416-25-0x000007FEF5720000-0x000007FEF610C000-memory.dmp

      Filesize

      9.9MB

    • memory/1416-4-0x000007FEF5720000-0x000007FEF610C000-memory.dmp

      Filesize

      9.9MB

    • memory/1416-26-0x000007FEF5720000-0x000007FEF610C000-memory.dmp

      Filesize

      9.9MB

    • memory/1416-24-0x0000000000710000-0x000000000071C000-memory.dmp

      Filesize

      48KB

    • memory/1416-19-0x00000000004D0000-0x00000000004DC000-memory.dmp

      Filesize

      48KB

    • memory/1416-16-0x00000000004A0000-0x00000000004AE000-memory.dmp

      Filesize

      56KB

    • memory/1416-14-0x0000000000490000-0x000000000049E000-memory.dmp

      Filesize

      56KB

    • memory/1416-3-0x000007FEF5720000-0x000007FEF610C000-memory.dmp

      Filesize

      9.9MB

    • memory/1416-39-0x000007FEF5723000-0x000007FEF5724000-memory.dmp

      Filesize

      4KB

    • memory/1416-40-0x000007FEF5720000-0x000007FEF610C000-memory.dmp

      Filesize

      9.9MB

    • memory/1416-2-0x000007FEF5720000-0x000007FEF610C000-memory.dmp

      Filesize

      9.9MB

    • memory/1416-46-0x000007FEF5720000-0x000007FEF610C000-memory.dmp

      Filesize

      9.9MB

    • memory/1416-1-0x0000000000270000-0x000000000046E000-memory.dmp

      Filesize

      2.0MB