Analysis

  • max time kernel
    119s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    11-11-2024 02:22

General

  • Target

    4c6650813906ced18f7564f906ea5a033a206cb2c71f244e0d28a04e3f2d7609.exe

  • Size

    1.9MB

  • MD5

    4cc23344d26c44260cb52028cff992b7

  • SHA1

    7f2b7a02ae3f65c6757f134a79c302a92e31311c

  • SHA256

    4c6650813906ced18f7564f906ea5a033a206cb2c71f244e0d28a04e3f2d7609

  • SHA512

    71e7ced9568ede15e9a9fe6edbd7ed77559f9046e8fc77ce83bb3fd464c61794ba719451774b2c02f30abc80a51f3563a1491a74d7f390d8152cd0b3b2928c45

  • SSDEEP

    49152:UbA30IKxSrOw6FNapB0LFyYsyqX96ZU8jMWg3:UberOGpaMYducjM3

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 30 IoCs

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

  • UAC bypass 3 TTPs 6 IoCs
  • DCRat payload 3 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Disables Task Manager via registry modification
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Checks whether UAC is enabled 1 TTPs 4 IoCs
  • Drops file in Program Files directory 10 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies registry key 1 TTPs 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 30 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs
  • System policy modification 1 TTPs 6 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\4c6650813906ced18f7564f906ea5a033a206cb2c71f244e0d28a04e3f2d7609.exe
    "C:\Users\Admin\AppData\Local\Temp\4c6650813906ced18f7564f906ea5a033a206cb2c71f244e0d28a04e3f2d7609.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2876
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\BrowserreviewSavesruntimeperf\cyoW9TDLPAWUwl12Pv6zflv.vbe"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2892
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c ""C:\BrowserreviewSavesruntimeperf\4COnkcqgLamz7kP5YHD7l4vjV.bat" "
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2588
        • C:\BrowserreviewSavesruntimeperf\Blockreview.exe
          "C:\BrowserreviewSavesruntimeperf\Blockreview.exe"
          4⤵
          • UAC bypass
          • Executes dropped EXE
          • Checks whether UAC is enabled
          • Drops file in Program Files directory
          • Drops file in Windows directory
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          • System policy modification
          PID:2640
          • C:\Program Files\Windows Photo Viewer\de-DE\OSPPSVC.exe
            "C:\Program Files\Windows Photo Viewer\de-DE\OSPPSVC.exe"
            5⤵
            • UAC bypass
            • Executes dropped EXE
            • Checks whether UAC is enabled
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • System policy modification
            PID:1464
        • C:\Windows\SysWOW64\reg.exe
          reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f
          4⤵
          • System Location Discovery: System Language Discovery
          • Modifies registry key
          PID:2096
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\BrowserreviewSavesruntimeperf\file.vbs"
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2088
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 9 /tr "'C:\Recovery\18fc4542-69f6-11ef-a46c-62cb582c238c\sppsvc.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2372
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Recovery\18fc4542-69f6-11ef-a46c-62cb582c238c\sppsvc.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 "sppsvcs" /sc MINUTE /mo 12 /tr "'C:\Recovery\18fc4542-69f6-11ef-a46c-62cb582c238c\sppsvc.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2396
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 9 /tr "'C:\MSOCache\All Users\taskhost.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2296
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\MSOCache\All Users\taskhost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2680
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 11 /tr "'C:\MSOCache\All Users\taskhost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2872
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Windows NT\Accessories\es-ES\taskhost.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2980
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows NT\Accessories\es-ES\taskhost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:3004
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\Windows NT\Accessories\es-ES\taskhost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2644
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smsss" /sc MINUTE /mo 10 /tr "'C:\Users\Public\smss.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2992
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Users\Public\smss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:3036
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smsss" /sc MINUTE /mo 6 /tr "'C:\Users\Public\smss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:3060
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 12 /tr "'C:\Users\All Users\Package Cache\{BF08E976-B92E-4336-B56F-2171179476C4}v14.30.30704\csrss.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2864
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Users\All Users\Package Cache\{BF08E976-B92E-4336-B56F-2171179476C4}v14.30.30704\csrss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1196
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 10 /tr "'C:\Users\All Users\Package Cache\{BF08E976-B92E-4336-B56F-2171179476C4}v14.30.30704\csrss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1968
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "OSPPSVCO" /sc MINUTE /mo 13 /tr "'C:\Program Files\Windows Photo Viewer\de-DE\OSPPSVC.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2204
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "OSPPSVC" /sc ONLOGON /tr "'C:\Program Files\Windows Photo Viewer\de-DE\OSPPSVC.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2156
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "OSPPSVCO" /sc MINUTE /mo 13 /tr "'C:\Program Files\Windows Photo Viewer\de-DE\OSPPSVC.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2280
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "WmiPrvSEW" /sc MINUTE /mo 8 /tr "'C:\Windows\IME\es-ES\WmiPrvSE.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2264
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Windows\IME\es-ES\WmiPrvSE.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2028
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "WmiPrvSEW" /sc MINUTE /mo 11 /tr "'C:\Windows\IME\es-ES\WmiPrvSE.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1652
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Microsoft Analysis Services\AS OLEDB\spoolsv.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2420
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft Analysis Services\AS OLEDB\spoolsv.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2452
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Microsoft Analysis Services\AS OLEDB\spoolsv.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1972
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 9 /tr "'C:\Program Files\Windows Defender\ja-JP\spoolsv.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1608
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Program Files\Windows Defender\ja-JP\spoolsv.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:844
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 12 /tr "'C:\Program Files\Windows Defender\ja-JP\spoolsv.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2300
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Adobe\System.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2480
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Program Files (x86)\Adobe\System.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:700
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Adobe\System.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1288

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\BrowserreviewSavesruntimeperf\4COnkcqgLamz7kP5YHD7l4vjV.bat

    Filesize

    162B

    MD5

    30ca6fe561a5efd9a1f56bbb4cfd2ec0

    SHA1

    8c6d786d854487eb43f2ba5c48f739ad565b398e

    SHA256

    d749a9500abf1e22af57ef9bc10b7e30f599067dffb7152e03c67eb70a1f6e2b

    SHA512

    85ff52e77cd3e6c2e329d4b921905865484c62dcb8d53ba97d8e04972e78934648b2fe51890ff949436a2afbabbe74c4e65e1d28a51cdcb2620429c7f481018a

  • C:\BrowserreviewSavesruntimeperf\cyoW9TDLPAWUwl12Pv6zflv.vbe

    Filesize

    231B

    MD5

    01218abf206810b6e271415d154b23f4

    SHA1

    4ca645974bcd3f9baaf6dbf9073e82717494e7fe

    SHA256

    5631e2c439fe88993fc8a5ace15a447afc23c6f9412fa5e48fc78e96aa14699b

    SHA512

    caebaa06e1236fe479b49860a57e065ff70ce876b86fe254bac8912c1f1b2be5022a21c59b45148cfa2b8388c0f4f22655ebd36fb13df1221443de3bacce48d8

  • C:\BrowserreviewSavesruntimeperf\file.vbs

    Filesize

    34B

    MD5

    677cc4360477c72cb0ce00406a949c61

    SHA1

    b679e8c3427f6c5fc47c8ac46cd0e56c9424de05

    SHA256

    f1cccb5ae4aa51d293bd3c7d2a1a04cb7847d22c5db8e05ac64e9a6d7455aa0b

    SHA512

    7cfe2cc92f9e659f0a15a295624d611b3363bd01eb5bcf9bc7681ea9b70b0564d192d570d294657c8dc2c93497fa3b4526c975a9bf35d69617c31d9936573c6a

  • \BrowserreviewSavesruntimeperf\Blockreview.exe

    Filesize

    1.6MB

    MD5

    3298254972dfd7e76172f9d3a7675b27

    SHA1

    569946a908e6a9cfa0a3faa28996d886b749e4eb

    SHA256

    719c6747522525b61a364a3d62e5777c9f8715dc8654bfd082e7928e4db39188

    SHA512

    8200af5528dcc1f4b6eddb13540f03ba9d142fc6ef779c94ca1d59fbcb2ed3021638c7b6cc7f865c75c8dd3fe8ef652291b91c9044f3c6b9e57f9fad1c99271d

  • memory/1464-57-0x00000000009A0000-0x0000000000B40000-memory.dmp

    Filesize

    1.6MB

  • memory/2640-22-0x0000000002110000-0x0000000002126000-memory.dmp

    Filesize

    88KB

  • memory/2640-20-0x0000000000820000-0x000000000083C000-memory.dmp

    Filesize

    112KB

  • memory/2640-21-0x0000000000840000-0x0000000000848000-memory.dmp

    Filesize

    32KB

  • memory/2640-19-0x0000000000810000-0x000000000081E000-memory.dmp

    Filesize

    56KB

  • memory/2640-23-0x0000000002130000-0x000000000213A000-memory.dmp

    Filesize

    40KB

  • memory/2640-24-0x0000000002140000-0x000000000214C000-memory.dmp

    Filesize

    48KB

  • memory/2640-25-0x0000000002150000-0x0000000002162000-memory.dmp

    Filesize

    72KB

  • memory/2640-26-0x0000000002160000-0x000000000216C000-memory.dmp

    Filesize

    48KB

  • memory/2640-27-0x0000000002320000-0x0000000002328000-memory.dmp

    Filesize

    32KB

  • memory/2640-28-0x0000000002330000-0x000000000233E000-memory.dmp

    Filesize

    56KB

  • memory/2640-29-0x0000000002340000-0x000000000234E000-memory.dmp

    Filesize

    56KB

  • memory/2640-30-0x000000001A860000-0x000000001A86C000-memory.dmp

    Filesize

    48KB

  • memory/2640-18-0x0000000000320000-0x00000000004C0000-memory.dmp

    Filesize

    1.6MB