Analysis
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max time kernel
122s -
max time network
123s -
platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
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submitted
23-12-2024 01:09
General
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Target
92d7397217e43be9580e67e5d5568a5252966eea16dd213cae536b8b291c0310.exe
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Size
952KB
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MD5
acab32b0f304cd037ac7255786b4bb02
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SHA1
345fee6d21b2a5f66d159c1ead3b859089a0dc6f
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SHA256
92d7397217e43be9580e67e5d5568a5252966eea16dd213cae536b8b291c0310
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SHA512
8fbdfed630d54e2590ea2f279d6beb2eda7cb20861fc587e61995f40ce272336c9bdf1a609da215679b0322c6b046399bb98a318e7647c1429721122ed4c0daa
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SSDEEP
24576:e+O7F9smBDJwWmIezBLwsHuWbxR4AK5ZJXX:Z8/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 7 IoCs
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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 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 14 IoCs
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Checks whether UAC is enabled 1 TTPs 4 IoCs
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Drops file in System32 directory 20 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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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 1 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 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\92d7397217e43be9580e67e5d5568a5252966eea16dd213cae536b8b291c0310.exe"C:\Users\Admin\AppData\Local\Temp\92d7397217e43be9580e67e5d5568a5252966eea16dd213cae536b8b291c0310.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
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
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C:\Windows\System32\NlsData0c1a\smss.exe"C:\Windows\System32\NlsData0c1a\smss.exe"2⤵
- 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 "OSPPSVC" /sc ONLOGON /tr "'C:\Windows\addins\OSPPSVC.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 "smss" /sc ONLOGON /tr "'C:\Windows\System32\NlsData0c1a\smss.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\MultiDigiMon\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 "92d7397217e43be9580e67e5d5568a5252966eea16dd213cae536b8b291c0310" /sc ONLOGON /tr "'C:\Users\Admin\AppData\Local\Temp\ose00000\92d7397217e43be9580e67e5d5568a5252966eea16dd213cae536b8b291c0310.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 "lsass" /sc ONLOGON /tr "'C:\Windows\System32\vcomp140\lsass.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 "taskhost" /sc ONLOGON /tr "'C:\Windows\System32\ieapfltr\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 "92d7397217e43be9580e67e5d5568a5252966eea16dd213cae536b8b291c0310" /sc ONLOGON /tr "'C:\Program Files\VideoLAN\VLC\92d7397217e43be9580e67e5d5568a5252966eea16dd213cae536b8b291c0310.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
MD5d903e11b0eb00b6c75239f5103e6e509
SHA1aeb02b3a907a7fe12157d84d8fb017e70be5c683
SHA256a9348c24958af88943abc3064b312b447363b8d2765bf6b82a96f3e018029dc1
SHA512595334d71af70b173509afbdb254de64127b52097a15526932b639f580a52eecf4f27fde9ed8f60258edc9139c4de91b71ee0f50855e0547b8da7c5f35401919
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Filesize
952KB
MD5acab32b0f304cd037ac7255786b4bb02
SHA1345fee6d21b2a5f66d159c1ead3b859089a0dc6f
SHA25692d7397217e43be9580e67e5d5568a5252966eea16dd213cae536b8b291c0310
SHA5128fbdfed630d54e2590ea2f279d6beb2eda7cb20861fc587e61995f40ce272336c9bdf1a609da215679b0322c6b046399bb98a318e7647c1429721122ed4c0daa
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Filesize
64KB
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Filesize
40KB
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Filesize
4KB
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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
64KB
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Filesize
48KB
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Filesize
48KB
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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