Analysis
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max time kernel
94s -
max time network
102s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
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submitted
15-01-2025 22:44
General
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Target
f8cd2c9aa166be23955974effbf60aa6d3c7d4d7b65317f3a61229642a8a0d91.exe
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Size
783KB
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MD5
d1f8a9706cdd91485e3571bf4d3c2098
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SHA1
db09131e7267caa8157d4c74aceeb9644d5cdf5f
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SHA256
f8cd2c9aa166be23955974effbf60aa6d3c7d4d7b65317f3a61229642a8a0d91
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SHA512
d086b4bcb399ee372a6487eeb5c907480afc0b5919ec855c8923c9f7e962c510b980fe89ee409a8aa956e6920065f2cf3eaafc4c136b37bb2ba18a595a35fb4f
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SSDEEP
12288:GqnOYxdAgpoNeF91rg5iFdr0yQ9gYx+EIpakCYJRU7Q9bWoFzqKa:G+OQbpbgsFdAyQvzSqaq8qV
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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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 3 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 7 IoCs
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Checks whether UAC is enabled 1 TTPs 2 IoCs
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Drops file in System32 directory 16 IoCs
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Drops file in Windows directory 4 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 14 IoCs
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Suspicious use of AdjustPrivilegeToken 2 IoCs
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Suspicious use of WriteProcessMemory 2 IoCs
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System policy modification 1 TTPs 3 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\f8cd2c9aa166be23955974effbf60aa6d3c7d4d7b65317f3a61229642a8a0d91.exe"C:\Users\Admin\AppData\Local\Temp\f8cd2c9aa166be23955974effbf60aa6d3c7d4d7b65317f3a61229642a8a0d91.exe"1⤵
- 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\twain_32\Registry.exe"C:\Windows\twain_32\Registry.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "Registry" /sc ONLOGON /tr "'C:\Windows\twain_32\Registry.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:\Documents and Settings\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 "dwm" /sc ONLOGON /tr "'C:\Windows\System32\wwanmm\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 "upfc" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\upfc.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 "fontdrvhost" /sc ONLOGON /tr "'C:\Windows\System32\snmptrap\fontdrvhost.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\classlog\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 "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\System32\bcd\RuntimeBroker.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
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
783KB
MD5d1f8a9706cdd91485e3571bf4d3c2098
SHA1db09131e7267caa8157d4c74aceeb9644d5cdf5f
SHA256f8cd2c9aa166be23955974effbf60aa6d3c7d4d7b65317f3a61229642a8a0d91
SHA512d086b4bcb399ee372a6487eeb5c907480afc0b5919ec855c8923c9f7e962c510b980fe89ee409a8aa956e6920065f2cf3eaafc4c136b37bb2ba18a595a35fb4f
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Filesize
783KB
MD56b563301c5fddf2342fed6e03c440253
SHA10d32f3fb0b9a87fa99c4f621083a4b7cfd902939
SHA2566ed4f5fd7a4891380b8c1f0fed1b9919307bfd3cde51cb7819fae69b69256bd1
SHA512a73867b102e81ddcbab3ddfafecb7f0a8c39ca832678b8e55c97641fb67851c69b3b3a6c25f2d97d5c8fd00fe2abb9353aca185677c80ed9f38659aa06678684
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Filesize
32KB
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Filesize
10.8MB
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Filesize
8KB
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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
32KB
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Filesize
40KB
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Filesize
32KB
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Filesize
32KB
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Filesize
32KB
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Filesize
64KB
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Filesize
32KB
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Filesize
10.8MB
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Filesize
32KB
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Filesize
32KB
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Filesize
32KB
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Filesize
48KB
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Filesize
32KB
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Filesize
32KB
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Filesize
32KB
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Filesize
10.8MB
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Filesize
10.8MB
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Filesize
10.8MB
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Filesize
808KB
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Filesize
32KB