Analysis
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max time kernel
118s -
max time network
118s -
platform
windows7_x64 -
resource
win7-20241010-en -
resource tags
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submitted
06-12-2024 22:04
General
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Target
4d9022605a286834508c28ec5c9a0ee0ba83cb0e573003919fe190598875fdb5.exe
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Size
952KB
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MD5
82ededc8ebe36096a29aeb793260f6c6
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SHA1
9bc9ba0e92990015e1ee7d3175506cd850e40f08
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SHA256
4d9022605a286834508c28ec5c9a0ee0ba83cb0e573003919fe190598875fdb5
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SHA512
a94b65efa5a07af586071dad395e7694e30acb5a4ef6ff19f55f8191a11bfacd3c1cfd17e04077949091ace10e573033c4399aaa23264435780e34f081700120
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SSDEEP
24576:W+O7F9smBDJwWmIezBLwsHuWbxR4AK5ZJXXl:x8/KfRTKv
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 10 IoCs
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Process spawned unexpected child process 10 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
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UAC bypass 3 TTPs 9 IoCs
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DCRat payload 5 IoCs
Detects payload of DCRat, commonly dropped by NSIS installers.
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Executes dropped EXE 2 IoCs
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Adds Run key to start application 2 TTPs 20 IoCs
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Checks whether UAC is enabled 1 TTPs 6 IoCs
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Drops file in System32 directory 22 IoCs
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Drops file in Program Files directory 3 IoCs
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Drops file in Windows directory 9 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 10 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious behavior: EnumeratesProcesses 6 IoCs
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Suspicious use of AdjustPrivilegeToken 3 IoCs
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Suspicious use of WriteProcessMemory 6 IoCs
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System policy modification 1 TTPs 9 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\4d9022605a286834508c28ec5c9a0ee0ba83cb0e573003919fe190598875fdb5.exe"C:\Users\Admin\AppData\Local\Temp\4d9022605a286834508c28ec5c9a0ee0ba83cb0e573003919fe190598875fdb5.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 Windows 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\4d9022605a286834508c28ec5c9a0ee0ba83cb0e573003919fe190598875fdb5.exe"C:\Users\Admin\AppData\Local\Temp\4d9022605a286834508c28ec5c9a0ee0ba83cb0e573003919fe190598875fdb5.exe"2⤵
- Modifies WinLogon for persistence
- UAC bypass
- Executes dropped EXE
- 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:\Program Files\Windows Photo Viewer\de-DE\csrss.exe"C:\Program Files\Windows Photo Viewer\de-DE\csrss.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 "lsm" /sc ONLOGON /tr "'C:\Windows\Branding\ShellBrd\lsm.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 "WmiPrvSE" /sc ONLOGON /tr "'C:\Windows\System32\wbem\wpdmtp\WmiPrvSE.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:\Users\Default\Favorites\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 "spoolsv" /sc ONLOGON /tr "'C:\Windows\System32\normidna\spoolsv.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:\Windows\System32\WUDFCoinstaller\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 "lsass" /sc ONLOGON /tr "'C:\Windows\System32\mscat32\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 "sppsvc" /sc ONLOGON /tr "'C:\Windows\System32\KBDINASA\sppsvc.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\api-ms-win-crt-convert-l1-1-0\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 "csrss" /sc ONLOGON /tr "'C:\Program Files\Windows Photo Viewer\de-DE\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 "smss" /sc ONLOGON /tr "'C:\Windows\ModemLogs\smss.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
MD582ededc8ebe36096a29aeb793260f6c6
SHA19bc9ba0e92990015e1ee7d3175506cd850e40f08
SHA2564d9022605a286834508c28ec5c9a0ee0ba83cb0e573003919fe190598875fdb5
SHA512a94b65efa5a07af586071dad395e7694e30acb5a4ef6ff19f55f8191a11bfacd3c1cfd17e04077949091ace10e573033c4399aaa23264435780e34f081700120
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Filesize
952KB
MD588da2110432e89c73ed202c4adbec720
SHA1e9059a8ba711fe7475bc0de9efe75f758ce6e5e5
SHA256c844c4574183306af2f9cd32e43eebeb0a33e5d804391eeda8d5f4fd7c34b717
SHA5129e4b32ac7c8bde6cf301a7194a91611d7c9fab5ff4d9f4e6ffce88725383452ef7e3336bf4485550f41433068c651f439b0b931e4366f120d8edef0bb1c7a38a
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Filesize
952KB
MD5d0fc2239b51302519e7a6f6a891b43c6
SHA16cf997f48760569edb9db0998b2c4e9628135fe1
SHA256b4849f47a655d1a3c41049d2a2ca6a71cafefdafd4257550cc14de9e10b4e808
SHA51272156bbe6cc6ec3604b71c84c6921d187e546f5edd080a2daa1ceb326a39c1c031e69b56e57f581f90960c3a92c52be889b4838d4ec5000aa7339f66858c8426
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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