Analysis
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max time kernel
105s -
max time network
17s -
platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
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submitted
10-12-2024 18:56
General
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Target
27e67aaa049c2243423f3c2c33e7747033f63234eda122bc9beaad90528cfd0dN.exe
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Size
952KB
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MD5
8e6e52fa1da6893e7bee069c7e5dacd0
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SHA1
e05854289cc5bb1c60c39fd5453b720cf79eabad
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SHA256
27e67aaa049c2243423f3c2c33e7747033f63234eda122bc9beaad90528cfd0d
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SHA512
19ca97f006c3a34bc16f6d0538b3ef3d40ebc80c4b2a7019c91ffe989250f8109e337af2c808aa4010c72334d2afd6883f247f573b5b33b5b4d019e234d881b9
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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 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 6 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 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 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 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\27e67aaa049c2243423f3c2c33e7747033f63234eda122bc9beaad90528cfd0dN.exe"C:\Users\Admin\AppData\Local\Temp\27e67aaa049c2243423f3c2c33e7747033f63234eda122bc9beaad90528cfd0dN.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:\Program Files\Common Files\Microsoft Shared\OfficeSoftwareProtectionPlatform\osppobjs-spp-plugin-manifest-signed\OSPPSVC.exe"C:\Program Files\Common Files\Microsoft Shared\OfficeSoftwareProtectionPlatform\osppobjs-spp-plugin-manifest-signed\OSPPSVC.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:\Program Files\Common Files\Microsoft Shared\OfficeSoftwareProtectionPlatform\osppobjs-spp-plugin-manifest-signed\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 "wininit" /sc ONLOGON /tr "'C:\Windows\System32\psisrndr\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 "winlogon" /sc ONLOGON /tr "'C:\Windows\IME\fr-FR\winlogon.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:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\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 "explorer" /sc ONLOGON /tr "'C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\explorer.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
MD5d8cf22ce529f3828a077dc9f034b6262
SHA1e6d966bc3302f97ea0d5eff35cf2ab3ad3e5af2b
SHA256ab7bb6079b42ddc3a8d8c66a6e2d1a02f7e24fbb09c4f2a6bee70284f66425f0
SHA51206a2eda8af74e4048f90806c646c8f570aa327d5febbbbb93cd8ac316a8e8fe1a218cf0edf226720719c92749592fa3934a28c812bffd39bff9fe74db5f1512a
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Filesize
952KB
MD58e6e52fa1da6893e7bee069c7e5dacd0
SHA1e05854289cc5bb1c60c39fd5453b720cf79eabad
SHA25627e67aaa049c2243423f3c2c33e7747033f63234eda122bc9beaad90528cfd0d
SHA51219ca97f006c3a34bc16f6d0538b3ef3d40ebc80c4b2a7019c91ffe989250f8109e337af2c808aa4010c72334d2afd6883f247f573b5b33b5b4d019e234d881b9
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Filesize
952KB
MD53889021a43a04be0c4bcdebd851b5c00
SHA1fcd5f2638af412cd2ee32d055feeaf2b30612c91
SHA256ce10ca60ea73c864884a698f2d21f20fdc25cca9c48326c5998287c924528f21
SHA512887eed65b038acadb859a1e2ebf07207084bae56991f02133b0eb265ee06c80bd1d2f4311f5e29dd6b1118d3c893747a74161c0cd0b8abcb388407bd0c3641cc
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Filesize
952KB
MD5bf81eb7d395a212976a5cd184014f035
SHA182fc51db70da3ddd84d831cb21439da1f84f6f3c
SHA256e1d4778ae186097ea4b7c303137124ac618980780c0dd3a58d6c02c8c57ac590
SHA5123919cd03d5fa802df5ee08cff740db881920611832b373bd6b578eb3116e20a5fa267e19708d3d8e2d1648caaf421be5a825b8920d23c983599fb19355445dc5
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Filesize
64KB
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Filesize
48KB
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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
40KB
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Filesize
4KB
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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