Analysis
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max time kernel
94s -
max time network
120s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
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submitted
25-11-2024 09:00
General
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Target
c5b0c4091b5602fd081195be510fc967b4eec2c54239524e75974ad14d692013N.exe
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Size
2.6MB
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MD5
211d71bd2e87ea410f7990390866e140
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SHA1
81873ad085c91853a1217ec22e211a5433914764
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SHA256
c5b0c4091b5602fd081195be510fc967b4eec2c54239524e75974ad14d692013
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SHA512
be979feb800b91ac22bdae27867b227332fad764e7927caa193d2c611d7fcabb820ce89dbab25511add1e326f630fbfbff23b8465d9fe3478a41a1e3d8d60d0a
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SSDEEP
49152:emi19AidDFahbHmYZuRJv0uEORfMDsSfFaMpDsrmcY4:et9zFahbHmR5GOZQL
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 6 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 2 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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Checks whether UAC is enabled 1 TTPs 4 IoCs
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Drops file in Program Files directory 5 IoCs
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Drops file in Windows directory 5 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 6 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 behavior: GetForegroundWindowSpam 1 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\c5b0c4091b5602fd081195be510fc967b4eec2c54239524e75974ad14d692013N.exe"C:\Users\Admin\AppData\Local\Temp\c5b0c4091b5602fd081195be510fc967b4eec2c54239524e75974ad14d692013N.exe"1⤵
- UAC bypass
- Checks computer location settings
- Checks whether UAC is enabled
- 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\2cfOw3EDP6.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\Windows Sidebar\Shared Gadgets\fontdrvhost.exe"C:\Program Files\Windows Sidebar\Shared Gadgets\fontdrvhost.exe"3⤵
- UAC bypass
- Executes dropped EXE
- Checks whether UAC is enabled
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- System policy modification
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 6 /tr "'C:\Program Files\Windows Sidebar\Shared Gadgets\fontdrvhost.exe'" /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:\Program Files\Windows Sidebar\Shared Gadgets\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 "fontdrvhostf" /sc MINUTE /mo 8 /tr "'C:\Program Files\Windows Sidebar\Shared Gadgets\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 "RuntimeBrokerR" /sc MINUTE /mo 13 /tr "'C:\Windows\tracing\RuntimeBroker.exe'" /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\tracing\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 "RuntimeBrokerR" /sc MINUTE /mo 12 /tr "'C:\Windows\tracing\RuntimeBroker.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
Network
MITRE ATT&CK Enterprise v15
Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Scheduled Task/Job
1Scheduled Task
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
2.6MB
MD5211d71bd2e87ea410f7990390866e140
SHA181873ad085c91853a1217ec22e211a5433914764
SHA256c5b0c4091b5602fd081195be510fc967b4eec2c54239524e75974ad14d692013
SHA512be979feb800b91ac22bdae27867b227332fad764e7927caa193d2c611d7fcabb820ce89dbab25511add1e326f630fbfbff23b8465d9fe3478a41a1e3d8d60d0a
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Filesize
228B
MD54c394bea0ea4b3a0da4b28af57efe9c0
SHA165e7724139488b1f74669f792fc8c18fd51ed86c
SHA2561c0b4ecfa400b6185235db56aec5f3e0fc954c0ee2d510669f4b82d738c2f117
SHA512d69346d9dc44521d6b0db2ae35d07f30f6bc526a4beff95796bbf59b122109835f2338b6ee038f97a1bfc8d19ddf1dcef51d126f27d93e0f2237e412024d9992
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Filesize
32KB
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Filesize
32KB
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Filesize
8KB
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Filesize
320KB
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Filesize
40KB
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Filesize
32KB
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Filesize
88KB
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Filesize
64KB
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Filesize
32KB
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Filesize
5.2MB
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Filesize
112KB
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Filesize
72KB
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Filesize
344KB
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Filesize
48KB
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Filesize
48KB
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Filesize
56KB
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Filesize
56KB
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Filesize
40KB
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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
2.6MB
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Filesize
344KB