Analysis
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max time kernel
93s -
max time network
95s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
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submitted
25-01-2025 07:39
General
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Target
4d68ce61047c125e3537ec992fd0a6a156bf64f21aa1c55c909aedf5871fe2cd.exe
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Size
952KB
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MD5
0ebb2d19c8a22a1a31f2088164233d7c
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SHA1
ba880d1df17a566198ed16f91ae16126c9103a40
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SHA256
4d68ce61047c125e3537ec992fd0a6a156bf64f21aa1c55c909aedf5871fe2cd
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SHA512
373f71389e03747a73ef5d02ba998cea4f60eb718af44bce83def2395c1fbcaf99bacf78b9fc79eea9c24018a81864a17cfb81bbe8462d8eb9e6b4874b56fdb5
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SSDEEP
24576:2+O7F9smBDJwWmIezBLwsHuWbxR4AK5ZJXXu:R8/KfRTKM
Malware Config
Signatures
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DcRat
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
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Dcrat family
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Modifies WinLogon for persistence 2 TTPs 7 IoCs
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Process spawned unexpected child process 7 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
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UAC bypass 3 TTPs 6 IoCs
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DCRat payload 5 IoCs
Detects payload of DCRat, commonly dropped by NSIS installers.
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
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Executes dropped EXE 1 IoCs
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Adds Run key to start application 2 TTPs 14 IoCs
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Checks whether UAC is enabled 1 TTPs 4 IoCs
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Drops file in System32 directory 10 IoCs
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Drops file in Program Files directory 5 IoCs
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Drops file in Windows directory 10 IoCs
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Modifies registry class 1 IoCs
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Scheduled Task/Job: Scheduled Task 1 TTPs 7 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious behavior: EnumeratesProcesses 7 IoCs
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Suspicious use of AdjustPrivilegeToken 2 IoCs
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Suspicious use of WriteProcessMemory 6 IoCs
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System policy modification 1 TTPs 6 IoCs
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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
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C:\Users\Admin\AppData\Local\Temp\4d68ce61047c125e3537ec992fd0a6a156bf64f21aa1c55c909aedf5871fe2cd.exe"C:\Users\Admin\AppData\Local\Temp\4d68ce61047c125e3537ec992fd0a6a156bf64f21aa1c55c909aedf5871fe2cd.exe"1⤵
- Modifies WinLogon for persistence
- UAC bypass
- Checks computer location settings
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in System32 directory
- Drops file in Program Files directory
- Drops file in Windows directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\ilOB9Tu5Go.bat"2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\w32tm.exew32tm /stripchart /computer:localhost /period:5 /dataonly /samples:23⤵
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C:\Program Files (x86)\Windows Defender\de-DE\sysmon.exe"C:\Program Files (x86)\Windows Defender\de-DE\sysmon.exe"3⤵
- UAC bypass
- Executes dropped EXE
- Checks whether UAC is enabled
- Suspicious use of AdjustPrivilegeToken
- System policy modification
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Windows\System32\rasctrnm\dllhost.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "4d68ce61047c125e3537ec992fd0a6a156bf64f21aa1c55c909aedf5871fe2cd" /sc ONLOGON /tr "'C:\Users\Admin\AppData\Local\Temp\4d68ce61047c125e3537ec992fd0a6a156bf64f21aa1c55c909aedf5871fe2cd\4d68ce61047c125e3537ec992fd0a6a156bf64f21aa1c55c909aedf5871fe2cd.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "StartMenuExperienceHost" /sc ONLOGON /tr "'C:\Windows\Help\StartMenuExperienceHost.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "sihost" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\sihost.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\System32\KBDHE319\RuntimeBroker.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Defender\de-DE\sysmon.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "TextInputHost" /sc ONLOGON /tr "'C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\InputApp\LayoutData\TextInputHost.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
952KB
MD54256fda7bed26605c60f28335a714096
SHA14f4c26749baf00d1d8fde547cfa4100e484fe7dd
SHA256205bc7fc7496b9e0f70d947667f4a5bf5914f49b1fb4965bf346dc444654fd77
SHA512938e16a26d058126fd823e83ce754544184cd41fdc0efd28b6b42d6e5e838cc4f26e4d753e92b7eb38811bc5c75cf0b79ed8530e73c21afc40a61e28ccd217b8
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Filesize
220B
MD58b580aff4d5be2142e8b5fb177c53f71
SHA19dc140ad24d791e038444e914ca386728307372d
SHA256571bddadb32ba8a58c51c86e8f9f57cba7e18ca8c9f44f368e13ca5e70a43b3e
SHA5122a1c343c7588004e5f108d0078abaebaa8d4ddd0cfc51b3f4eab2bbdb552cc3bfef11a6ae6c35e05aabdfa9e98370c9ecc7dbbacd809be7e1564935877663f77
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Filesize
952KB
MD54df3330c11e876ef5a05f31f5ec36546
SHA12795194026ed2a95194110bc321a0ba7501664df
SHA2569509dfb6da2ec42ee77d42bcc44d139894ff04fbefcac7929c1e67e9ff356979
SHA512d2bdfed427f7c4be4d0a1c393ff67f535952d54232eb94e4d1dae176d6beb8916942f033132a8084833a3c8c8d8bf27a8626d5e21c9afd565ce673598172a776
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Filesize
952KB
MD50ebb2d19c8a22a1a31f2088164233d7c
SHA1ba880d1df17a566198ed16f91ae16126c9103a40
SHA2564d68ce61047c125e3537ec992fd0a6a156bf64f21aa1c55c909aedf5871fe2cd
SHA512373f71389e03747a73ef5d02ba998cea4f60eb718af44bce83def2395c1fbcaf99bacf78b9fc79eea9c24018a81864a17cfb81bbe8462d8eb9e6b4874b56fdb5
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Filesize
952KB
MD59bd7823204e9cd5a095770ac82690ec7
SHA17440942692e8dba08e3da3347b219d6e64e8c0c2
SHA256a1ba0cb8ea52d24d5a26310579b71fb850cc9107a1dac3d83d557a00d7b180cf
SHA512b6886ede4a1a677847ac76e93f7a2b9e26239b66ba9eb5f93b7ebd818ec66def9c49c406baf1b7dbdd414d12e7152828a21a31a7f7ddbb89f3496eafd8fd6393
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Filesize
64KB
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Filesize
40KB
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Filesize
40KB
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Filesize
48KB
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Filesize
40KB
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Filesize
48KB
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Filesize
32KB
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Filesize
48KB
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Filesize
8KB
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Filesize
64KB
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Filesize
10.8MB
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Filesize
10.8MB
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Filesize
976KB