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Analysis
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max time kernel
120s -
max time network
121s -
platform
windows7_x64 -
resource
win7-20240708-en -
resource tags
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submitted
25/01/2025, 04:02
General
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Target
9d6543c22a9d71de6a5a08d0189944fd98da698e917662fac24f98f2e08e2325.exe
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Size
952KB
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MD5
fa2fda3605fcdbaf69212aa3edb9f0f4
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SHA1
f44fde95e3d9915f65fab24f48dcd4eb505a26da
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SHA256
9d6543c22a9d71de6a5a08d0189944fd98da698e917662fac24f98f2e08e2325
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SHA512
019536005222cf19bdcc3c018993e3be36b1149f3b7a27938f65194b59aed6eba256e5949a119c7b90c7fe441b2201b7093e19066821875d81051e1869fccfdd
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SSDEEP
24576:2+O7F9smBDJwWmIezBLwsHuWbxR4AK5ZJXX:R8/KfRTK
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 4 IoCs
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Process spawned unexpected child process 4 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 8 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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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 4 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\9d6543c22a9d71de6a5a08d0189944fd98da698e917662fac24f98f2e08e2325.exe"C:\Users\Admin\AppData\Local\Temp\9d6543c22a9d71de6a5a08d0189944fd98da698e917662fac24f98f2e08e2325.exe"1⤵
- Modifies WinLogon for persistence
- UAC bypass
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in System32 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\K27RZ1o8t6.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:\Documents and Settings\dwm.exe"C:\Documents and Settings\dwm.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 "Idle" /sc ONLOGON /tr "'C:\Recovery\8cdd6da2-3d81-11ef-9400-f2a3cf4ad94f\Idle.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:\Documents and Settings\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 "dwm" /sc ONLOGON /tr "'C:\Windows\System32\elshyph\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 "spoolsv" /sc ONLOGON /tr "'C:\ProgramData\Start Menu\spoolsv.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
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Downloads
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Filesize
197B
MD5d64cd7f8bcff210ca55cd41cca3eb1bd
SHA17e28521273751fd4ad2f3180b2540cfecc24638d
SHA256a9f65d6070ed11530158ac4c1d8e0bcb6b3af9cce6024ec153019495b63ed791
SHA51289b7cb5ddcaf025074f662ad90d7575de623eb77569fcc3cfb42b680b7a9575bc341d2c5ae55f6f743c08f47192cf818ccabf2a32d4eb717cc7c6afde406ed74
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Filesize
952KB
MD5fa2fda3605fcdbaf69212aa3edb9f0f4
SHA1f44fde95e3d9915f65fab24f48dcd4eb505a26da
SHA2569d6543c22a9d71de6a5a08d0189944fd98da698e917662fac24f98f2e08e2325
SHA512019536005222cf19bdcc3c018993e3be36b1149f3b7a27938f65194b59aed6eba256e5949a119c7b90c7fe441b2201b7093e19066821875d81051e1869fccfdd
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Filesize
952KB
MD594567e1d8b73404d7b2a30faf1472209
SHA1436e07e8ae94cf9fa2d4157269f3a9d583c4ceb1
SHA256fdec4047171d68e95f84c081fa963a68d7d1d4e6b0361942788eb9854706a517
SHA5121025df8fd48d96debb2ce0905ece2c9508cd2196637c148893ae8b1c84bb71a57be932d6baf9063f126f8001ee3de5e4afc74947444fc4a46e6bc136b070bfcd
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Filesize
64KB
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Filesize
48KB
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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
4KB
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Filesize
48KB
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Filesize
64KB
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Filesize
9.9MB
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Filesize
976KB
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Filesize
9.9MB
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Filesize
976KB