Analysis
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max time kernel
117s -
max time network
118s -
platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
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submitted
13-01-2025 14:37
General
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Target
99cccc9c25dd6d31cb9541b8fd31cfd5d3f72fc393d157f1592320c9217bc576.exe
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Size
952KB
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MD5
c377fc47f9a69dfcdabb7a2e29d40142
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SHA1
e65c699ac98ea63b890062321c31b71db64c041c
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SHA256
99cccc9c25dd6d31cb9541b8fd31cfd5d3f72fc393d157f1592320c9217bc576
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SHA512
b4c213e65217fd720643d6aea277eb4d337de271ed637de2c31fd977408a2c7897bebae59d81bb178fc74b8cc7c879b330fdadbec98d86e85318af65bdf9898b
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SSDEEP
24576:e+O7F9smBDJwWmIezBLwsHuWbxR4AK5ZJXX3:Z8/KfRTKd
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 5 IoCs
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Process spawned unexpected child process 5 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 4 IoCs
Detects payload of DCRat, commonly dropped by NSIS installers.
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Executes dropped EXE 1 IoCs
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Adds Run key to start application 2 TTPs 10 IoCs
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Checks whether UAC is enabled 1 TTPs 4 IoCs
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Drops file in System32 directory 5 IoCs
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Drops file in Program Files 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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Scheduled Task/Job: Scheduled Task 1 TTPs 5 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious behavior: EnumeratesProcesses 1 IoCs
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Suspicious use of AdjustPrivilegeToken 2 IoCs
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Suspicious use of WriteProcessMemory 9 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\99cccc9c25dd6d31cb9541b8fd31cfd5d3f72fc393d157f1592320c9217bc576.exe"C:\Users\Admin\AppData\Local\Temp\99cccc9c25dd6d31cb9541b8fd31cfd5d3f72fc393d157f1592320c9217bc576.exe"1⤵
- Modifies WinLogon for persistence
- UAC bypass
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in System32 directory
- Drops file in Program Files directory
- 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\0uxQi2uA3S.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\Common Files\Services\wininit.exe"C:\Program Files\Common Files\Services\wininit.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 "services" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-002C-0409-0000-0000000FF1CE}-C\Proof.fr\services.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 "services" /sc ONLOGON /tr "'C:\Documents and Settings\services.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 "wininit" /sc ONLOGON /tr "'C:\Program Files\Common Files\Services\wininit.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 "services" /sc ONLOGON /tr "'C:\Windows\System32\rpcss\services.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 "OSPPSVC" /sc ONLOGON /tr "'C:\Program Files (x86)\Google\CrashReports\OSPPSVC.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
MD5c377fc47f9a69dfcdabb7a2e29d40142
SHA1e65c699ac98ea63b890062321c31b71db64c041c
SHA25699cccc9c25dd6d31cb9541b8fd31cfd5d3f72fc393d157f1592320c9217bc576
SHA512b4c213e65217fd720643d6aea277eb4d337de271ed637de2c31fd977408a2c7897bebae59d81bb178fc74b8cc7c879b330fdadbec98d86e85318af65bdf9898b
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Filesize
952KB
MD5506371bb24355d34959c6ccda039202a
SHA171349197b7802ac46ec55d66d81d6ff4a410451c
SHA256cdbae4addf6b9b3b78ce161ddaac533d42ab71d6cc46be437fcf683f4b9aec53
SHA512346b65eaf4fa21a2228b5dd6f72b4725d707c0b05dfd1537ad05930302ca9d6ba59da8e73a1287f8b7a8434bf32f8c1b8581e2d5b78fcd2da74359ca74a4c224
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Filesize
214B
MD5b9618883a7caf09569eb7ac73f1edeed
SHA1e9b6a4e8aef7ce7f557dc5bb577d93480710032d
SHA256844ec7506c9024d8c1bc00c58d3854a82f89e89cc19dbcbbc107a405766ccc71
SHA5120bcc315e4a1605451be7ef8610e99f278f00f251320bcba789585d957ba4249183d97fa35fcfaab8ec85c150a34fce8a553b56c7422b1123dfee8dda1a36fae6
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Filesize
976KB
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Filesize
64KB
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Filesize
40KB
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Filesize
48KB
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Filesize
40KB
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Filesize
32KB
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Filesize
40KB
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Filesize
48KB
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Filesize
48KB
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Filesize
4KB
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Filesize
64KB
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Filesize
9.9MB
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Filesize
9.9MB
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Filesize
976KB