Analysis
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max time kernel
119s -
max time network
120s -
platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
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submitted
16-01-2025 05:39
General
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Target
b2fd79951a589f19ccbafb051b044c1054d1bc0de377758fa5bed3b134884cb6.exe
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Size
783KB
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MD5
2c61257d1d3d5237077be932a8f36611
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SHA1
73bda93a69680a551b515c831b19aa0724b40ddd
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SHA256
b2fd79951a589f19ccbafb051b044c1054d1bc0de377758fa5bed3b134884cb6
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SHA512
8d8f2a4c9cbbef1cc7ae205f2b9a4570bcc1f467b04d07a17370242e2b32919fdabcc1881c77f2ce7d23e58bea4b46d0d9947980d85f0b11217a65ebccaff21e
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SSDEEP
12288:GqnOYxdAgpoNeF91rg5iFdr0yQ9gYx+EIpakCYJRU7Q9bWoFzqKe:G+OQbpbgsFdAyQvzSqaq8qn
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 5 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 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 5 IoCs
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Checks whether UAC is enabled 1 TTPs 2 IoCs
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Drops file in System32 directory 12 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 12 IoCs
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Suspicious use of AdjustPrivilegeToken 2 IoCs
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Suspicious use of WriteProcessMemory 3 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\b2fd79951a589f19ccbafb051b044c1054d1bc0de377758fa5bed3b134884cb6.exe"C:\Users\Admin\AppData\Local\Temp\b2fd79951a589f19ccbafb051b044c1054d1bc0de377758fa5bed3b134884cb6.exe"1⤵
- 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:\Users\Admin\AppData\Local\Temp\Kno5811\b2fd79951a589f19ccbafb051b044c1054d1bc0de377758fa5bed3b134884cb6.exe"C:\Users\Admin\AppData\Local\Temp\Kno5811\b2fd79951a589f19ccbafb051b044c1054d1bc0de377758fa5bed3b134884cb6.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\taskhost.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 "b2fd79951a589f19ccbafb051b044c1054d1bc0de377758fa5bed3b134884cb6" /sc ONLOGON /tr "'C:\Users\Admin\AppData\Local\Temp\Kno5811\b2fd79951a589f19ccbafb051b044c1054d1bc0de377758fa5bed3b134884cb6.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 "csrss" /sc ONLOGON /tr "'C:\Windows\System32\expand\csrss.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\atmfd\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 "winlogon" /sc ONLOGON /tr "'C:\Windows\System32\gameux\winlogon.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
MD5205426f57a01699441f0d30a40457ed1
SHA1d1ddfee34108e9e88215e49b33af75a897f64087
SHA256f34665abef2631749c3068b3b62f2f6eb33dd8233e2c5fc2fd53a69691354d79
SHA512a68764d1f8798537fc842025f8436d37f960e6e0aed02a8c48c8ba614859f7a1de99467c52cb7e8e7c72f27b77f253e1a64896cec1ebb7bdf9261e4a33e68a0f
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Filesize
783KB
MD52c61257d1d3d5237077be932a8f36611
SHA173bda93a69680a551b515c831b19aa0724b40ddd
SHA256b2fd79951a589f19ccbafb051b044c1054d1bc0de377758fa5bed3b134884cb6
SHA5128d8f2a4c9cbbef1cc7ae205f2b9a4570bcc1f467b04d07a17370242e2b32919fdabcc1881c77f2ce7d23e58bea4b46d0d9947980d85f0b11217a65ebccaff21e
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Filesize
32KB
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Filesize
808KB
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Filesize
32KB
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Filesize
64KB
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Filesize
32KB
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Filesize
48KB
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Filesize
32KB
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Filesize
40KB
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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
9.9MB
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Filesize
32KB
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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
9.9MB
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Filesize
9.9MB
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Filesize
9.9MB
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Filesize
9.9MB
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Filesize
32KB
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Filesize
4KB
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Filesize
808KB