Analysis
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max time kernel
139s -
max time network
147s -
platform
windows10-2004_x64 -
resource
win10v2004-20230915-en -
resource tags
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submitted
16/10/2023, 14:41
General
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Target
NEAS.11d6778a8b7ee9220116e8324b208f20_JC.exe
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Size
783KB
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MD5
11d6778a8b7ee9220116e8324b208f20
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SHA1
cd33ebf6014c4187abd313c56f197a65cc59de2b
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SHA256
8ca7610b8cfb28281fa3bfacbd64752209c98d1228447434dfbee9ba01574c38
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SHA512
06a8c014d182c4404b5e3b8b057e393a85b6d70130f622d2b26374f91c391109db8ad48a24285e23ad2c99364d3eeb755ababc5afe4eb9c2f284b2bdf70c8130
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SSDEEP
12288:GqnOYxdAgpoNeF91rg5iFdr0yQ9gYx+EIpakCYJRU7Q9bWoFzqK:G+OQbpbgsFdAyQvzSqaq8q
Malware Config
Signatures
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DcRat 11 IoCs
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
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Process spawned unexpected child process 8 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 3 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 8 IoCs
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Checks whether UAC is enabled 1 TTPs 4 IoCs
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Drops file in System32 directory 12 IoCs
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Drops file in Program Files directory 3 IoCs
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Drops file in Windows directory 6 IoCs
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Creates scheduled task(s) 1 TTPs 8 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Modifies registry class 1 IoCs
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Suspicious behavior: EnumeratesProcesses 12 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\NEAS.11d6778a8b7ee9220116e8324b208f20_JC.exe"C:\Users\Admin\AppData\Local\Temp\NEAS.11d6778a8b7ee9220116e8324b208f20_JC.exe"1⤵
- DcRat
- 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 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\NSBYH8coCL.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:\Users\Admin\AppData\Local\Temp\NEAS.11d6778a8b7ee9220116e8324b208f20_JC.exe"C:\Users\Admin\AppData\Local\Temp\NEAS.11d6778a8b7ee9220116e8324b208f20_JC.exe"3⤵
- UAC bypass
- Executes dropped EXE
- 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
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- System policy modification
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "StartMenuExperienceHost" /sc ONLOGON /tr "'C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\resources\StartMenuExperienceHost.exe'" /rl HIGHEST /f1⤵
- DcRat
- Process spawned unexpected child process
- Creates scheduled task(s)
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\services.exe'" /rl HIGHEST /f1⤵
- DcRat
- Process spawned unexpected child process
- Creates scheduled task(s)
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "sihost" /sc ONLOGON /tr "'C:\Windows\System32\atl\sihost.exe'" /rl HIGHEST /f1⤵
- DcRat
- Process spawned unexpected child process
- Creates scheduled task(s)
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Program Files\Common Files\DESIGNER\spoolsv.exe'" /rl HIGHEST /f1⤵
- DcRat
- Process spawned unexpected child process
- Creates scheduled task(s)
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\System32\usbui\RuntimeBroker.exe'" /rl HIGHEST /f1⤵
- DcRat
- Process spawned unexpected child process
- Creates scheduled task(s)
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Windows\System32\Windows.Internal.CapturePicker.Desktop\dwm.exe'" /rl HIGHEST /f1⤵
- DcRat
- Process spawned unexpected child process
- Creates scheduled task(s)
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Windows\System32\Direct2DDesktop\fontdrvhost.exe'" /rl HIGHEST /f1⤵
- DcRat
- Process spawned unexpected child process
- Creates scheduled task(s)
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\Windows\HelpPane\sysmon.exe'" /rl HIGHEST /f1⤵
- DcRat
- Process spawned unexpected child process
- Creates scheduled task(s)
Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
1KB
MD5b7c0c43fc7804baaa7dc87152cdc9554
SHA11bab62bd56af745678d4e967d91e1ccfdeed4038
SHA25646386a61f3aaf1b1c2e6efc9fc7e9e9ff16cd13ae58b8d856835771fedb6d457
SHA5129fda3dd00a3406137e0113f13f78e77b20a76512b35820d38df696842cbbf2e2ebabfb99a3846c9637ecb54af858ec1551521187e379872973006426a253f769
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Filesize
783KB
MD511d6778a8b7ee9220116e8324b208f20
SHA1cd33ebf6014c4187abd313c56f197a65cc59de2b
SHA2568ca7610b8cfb28281fa3bfacbd64752209c98d1228447434dfbee9ba01574c38
SHA51206a8c014d182c4404b5e3b8b057e393a85b6d70130f622d2b26374f91c391109db8ad48a24285e23ad2c99364d3eeb755ababc5afe4eb9c2f284b2bdf70c8130
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Filesize
242B
MD52cd2dd100a8e1ccdaa9c07fade0973ae
SHA127bb71ce7fb3d5759ba84e8fc6818ce4706e744c
SHA25680a8914501b62fb3c4c8d25294bdb83c43369bb03f57a39152fc1d459ae01a46
SHA512dfeafc0f856051115440c15a3c35503289220075e083c683fd13f1691390ee4b575d5cf596d66f1ea4b02d74cf937ca16320a1ed938d187cf22995663565d4bf
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Filesize
783KB
MD511d6778a8b7ee9220116e8324b208f20
SHA1cd33ebf6014c4187abd313c56f197a65cc59de2b
SHA2568ca7610b8cfb28281fa3bfacbd64752209c98d1228447434dfbee9ba01574c38
SHA51206a8c014d182c4404b5e3b8b057e393a85b6d70130f622d2b26374f91c391109db8ad48a24285e23ad2c99364d3eeb755ababc5afe4eb9c2f284b2bdf70c8130
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Filesize
32KB
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Filesize
64KB
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Filesize
32KB
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Filesize
40KB
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Filesize
48KB
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Filesize
32KB
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Filesize
40KB
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Filesize
32KB
-
Filesize
32KB
-
Filesize
32KB
-
Filesize
32KB
-
Filesize
32KB
-
Filesize
32KB
-
Filesize
32KB
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Filesize
808KB
-
Filesize
32KB
-
Filesize
32KB
-
Filesize
64KB
-
Filesize
64KB
-
Filesize
48KB
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Filesize
32KB
-
Filesize
64KB
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Filesize
32KB
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Filesize
10.8MB
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Filesize
32KB
-
Filesize
10.8MB
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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
64KB
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Filesize
64KB
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Filesize
64KB
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Filesize
10.8MB