Analysis
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max time kernel
91s -
max time network
93s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
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submitted
22-11-2024 13:57
General
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Target
a9c9416b056e0834e13cc89adf3f8960fac7d0314a7474368df1a56a3404e8ae.exe
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Size
10.1MB
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MD5
2ee8eb2b3997b0cce6cc7c562a785719
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SHA1
b2d31d2a30815fa0c6dd1e637d7276bfb0547411
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SHA256
a9c9416b056e0834e13cc89adf3f8960fac7d0314a7474368df1a56a3404e8ae
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SHA512
34ee0171c041205b4b6bb631e0b72fb2f4d3056892281839f0b2e63b9f1997e037755cedd0d56dd64d96ddc878874148611f6eb4ee83238dd560ed59848e8059
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SSDEEP
24576:W+O4GptFtiU9SsYm1oO9teGnlcZ/uIO0EdZX0usIW6fgtixy4s+8BIbT19h8OCht:x5o9Y+Iu0u+YoAgO9kK4XyWDAyH6eB
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 11 IoCs
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Process spawned unexpected child process 11 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
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Checks computer location settings 2 TTPs 2 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 22 IoCs
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Drops file in System32 directory 16 IoCs
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Drops file in Windows directory 2 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 11 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 3 IoCs
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Suspicious use of WriteProcessMemory 8 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\a9c9416b056e0834e13cc89adf3f8960fac7d0314a7474368df1a56a3404e8ae.exe"C:\Users\Admin\AppData\Local\Temp\a9c9416b056e0834e13cc89adf3f8960fac7d0314a7474368df1a56a3404e8ae.exe"1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\a9c9416b056e0834e13cc89adf3f8960fac7d0314a7474368df1a56a3404e8ae.exe"C:\Users\Admin\AppData\Local\Temp\a9c9416b056e0834e13cc89adf3f8960fac7d0314a7474368df1a56a3404e8ae.exe"2⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Drops file in System32 directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\RbgId1oCFU.bat"3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\w32tm.exew32tm /stripchart /computer:localhost /period:5 /dataonly /samples:24⤵
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C:\Windows\System32\tcpmon\dwm.exe"C:\Windows\System32\tcpmon\dwm.exe"4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "unsecapp" /sc ONLOGON /tr "'C:\Windows\System32\wbem\rspndr\unsecapp.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 "explorer" /sc ONLOGON /tr "'C:\Windows\regedit\explorer.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:\Users\Public\Music\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 "SearchApp" /sc ONLOGON /tr "'C:\Documents and Settings\SearchApp.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 "dwm" /sc ONLOGON /tr "'C:\Windows\System32\tcpmon\dwm.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:\ProgramData\USOShared\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 "dwm" /sc ONLOGON /tr "'C:\Windows\System32\ideograf\dwm.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\licensingdiag\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 "dwm" /sc ONLOGON /tr "'C:\Windows\System32\LanguageOverlayServer\dwm.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 "unsecapp" /sc ONLOGON /tr "'C:\Windows\System32\wbem\WmiDcPrv\unsecapp.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 "lsass" /sc ONLOGON /tr "'C:\Windows\System32\Mpeg2Data\lsass.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
1Replay Monitor
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Downloads
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Filesize
1KB
MD5b7c0c43fc7804baaa7dc87152cdc9554
SHA11bab62bd56af745678d4e967d91e1ccfdeed4038
SHA25646386a61f3aaf1b1c2e6efc9fc7e9e9ff16cd13ae58b8d856835771fedb6d457
SHA5129fda3dd00a3406137e0113f13f78e77b20a76512b35820d38df696842cbbf2e2ebabfb99a3846c9637ecb54af858ec1551521187e379872973006426a253f769
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Filesize
198B
MD5226bdd756748251c1d3043c934703ced
SHA11c80e92001d3a0ac74c8c6dd757eb5536ca9f43a
SHA2567f8b9df0963529cef51b578a621c602e04917a351a8fdb84a1f4be443eb730c7
SHA512b66aa21b9fb3dbae8cdd42a4552936787c4424297466a5d5d9ed665c60a1bfbf5f077e9a735bae38b4c0d2a060dca5b0be185b7466f629f136e15d60362a850f
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Filesize
10.1MB
MD52ee8eb2b3997b0cce6cc7c562a785719
SHA1b2d31d2a30815fa0c6dd1e637d7276bfb0547411
SHA256a9c9416b056e0834e13cc89adf3f8960fac7d0314a7474368df1a56a3404e8ae
SHA51234ee0171c041205b4b6bb631e0b72fb2f4d3056892281839f0b2e63b9f1997e037755cedd0d56dd64d96ddc878874148611f6eb4ee83238dd560ed59848e8059
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Filesize
8KB
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Filesize
10.2MB
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Filesize
10.8MB
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Filesize
10.8MB
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Filesize
48KB
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Filesize
48KB
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Filesize
48KB
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Filesize
40KB
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Filesize
32KB