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Analysis
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max time kernel
94s -
max time network
140s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
13/01/2025, 23:26
Behavioral task
behavioral1
Sample
3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe
Resource
win7-20241010-en
Behavioral task
behavioral2
Sample
3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe
Resource
win10v2004-20241007-en
General
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Target
3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe
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Size
783KB
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MD5
ed7cbc3cc36f96754bf4b4748c5998b6
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SHA1
ae7867de6dc05871e3e4e7d34c0231383e416dd1
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SHA256
3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd
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SHA512
eac51f170a344feb0958733eaa6c6ee80b4934f1e70270f932e3593ce572d899bbe9d18e3075c394437d452a30f0341d12da8dc78080da8b93ebc08f458e4744
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SSDEEP
12288:GqnOYxdAgpoNeF91rg5iFdr0yQ9gYx+EIpakCYJRU7Q9bWoFzqK:G+OQbpbgsFdAyQvzSqaq8q
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 8 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
description pid pid_target Process procid_target Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 1156 3720 schtasks.exe 83 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 4768 3720 schtasks.exe 83 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2028 3720 schtasks.exe 83 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2080 3720 schtasks.exe 83 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 3932 3720 schtasks.exe 83 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 3852 3720 schtasks.exe 83 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 3068 3720 schtasks.exe 83 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 4480 3720 schtasks.exe 83 -
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0" 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe -
resource yara_rule behavioral2/memory/3088-1-0x0000000000AD0000-0x0000000000B9A000-memory.dmp dcrat behavioral2/files/0x0007000000023cb9-33.dat dcrat -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe -
Executes dropped EXE 1 IoCs
pid Process 736 lsass.exe -
Adds Run key to start application 2 TTPs 8 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dllhost = "\"C:\\Program Files (x86)\\Microsoft.NET\\RedistList\\dllhost.exe\"" 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\smss = "\"C:\\Program Files (x86)\\Windows Mail\\smss.exe\"" 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\lsass = "\"C:\\Windows\\System32\\activeds\\lsass.exe\"" 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\StartMenuExperienceHost = "\"C:\\Program Files (x86)\\WindowsPowerShell\\Modules\\PackageManagement\\1.0.0.1\\es\\StartMenuExperienceHost.exe\"" 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winlogon = "\"C:\\Windows\\System32\\ucrtbase\\winlogon.exe\"" 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd = "\"C:\\Documents and Settings\\3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe\"" 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winlogon = "\"C:\\Windows\\System32\\mfc110jpn\\winlogon.exe\"" 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\TextInputHost = "\"C:\\Documents and Settings\\TextInputHost.exe\"" 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe -
description ioc Process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe -
Drops file in System32 directory 12 IoCs
description ioc Process File opened for modification C:\Windows\System32\mfc110jpn\winlogon.exe 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe File created C:\Windows\System32\activeds\6203df4a6bafc7c328ee7f6f8ca0a8a838a8a1b9 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe File created C:\Windows\System32\ucrtbase\winlogon.exe 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe File created C:\Windows\System32\ucrtbase\cc11b995f2a76da408ea6a601e682e64743153ad 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe File opened for modification C:\Windows\System32\mfc110jpn\RCXAE04.tmp 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe File opened for modification C:\Windows\System32\activeds\RCXB693.tmp 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe File opened for modification C:\Windows\System32\activeds\lsass.exe 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe File opened for modification C:\Windows\System32\ucrtbase\RCXBB0A.tmp 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe File created C:\Windows\System32\mfc110jpn\winlogon.exe 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe File created C:\Windows\System32\mfc110jpn\cc11b995f2a76da408ea6a601e682e64743153ad 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe File created C:\Windows\System32\activeds\lsass.exe 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe File opened for modification C:\Windows\System32\ucrtbase\winlogon.exe 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe -
Drops file in Program Files directory 12 IoCs
description ioc Process File opened for modification C:\Program Files (x86)\WindowsPowerShell\Modules\PackageManagement\1.0.0.1\es\RCXB898.tmp 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe File opened for modification C:\Program Files (x86)\WindowsPowerShell\Modules\PackageManagement\1.0.0.1\es\StartMenuExperienceHost.exe 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe File created C:\Program Files (x86)\Microsoft.NET\RedistList\dllhost.exe 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe File created C:\Program Files (x86)\WindowsPowerShell\Modules\PackageManagement\1.0.0.1\es\55b276f4edf653fe07efe8f1ecc32d3d195abd16 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe File opened for modification C:\Program Files (x86)\Microsoft.NET\RedistList\dllhost.exe 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe File opened for modification C:\Program Files (x86)\Windows Mail\RCXB421.tmp 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe File opened for modification C:\Program Files (x86)\Windows Mail\smss.exe 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe File created C:\Program Files (x86)\Microsoft.NET\RedistList\5940a34987c99120d96dace90a3f93f329dcad63 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe File created C:\Program Files (x86)\Windows Mail\smss.exe 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe File created C:\Program Files (x86)\Windows Mail\69ddcba757bf72f7d36c464c71f42baab150b2b9 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe File created C:\Program Files (x86)\WindowsPowerShell\Modules\PackageManagement\1.0.0.1\es\StartMenuExperienceHost.exe 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe File opened for modification C:\Program Files (x86)\Microsoft.NET\RedistList\RCXB21D.tmp 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\ 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe -
Scheduled Task/Job: Scheduled Task 1 TTPs 8 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 3932 schtasks.exe 3852 schtasks.exe 3068 schtasks.exe 4480 schtasks.exe 1156 schtasks.exe 4768 schtasks.exe 2028 schtasks.exe 2080 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 14 IoCs
pid Process 3088 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe 3088 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe 3088 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe 3088 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe 3088 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe 3088 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe 3088 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe 3088 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe 3088 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe 3088 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe 3088 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe 3088 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe 3088 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe 3088 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 3088 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe Token: SeDebugPrivilege 736 lsass.exe -
Suspicious use of WriteProcessMemory 2 IoCs
description pid Process procid_target PID 3088 wrote to memory of 736 3088 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe 93 PID 3088 wrote to memory of 736 3088 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe 93 -
System policy modification 1 TTPs 3 IoCs
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0" 3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe -
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\3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe"C:\Users\Admin\AppData\Local\Temp\3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe"1⤵
- UAC bypass
- Checks computer location settings
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in System32 directory
- Drops file in Program Files directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
PID:3088 -
C:\Windows\System32\activeds\lsass.exe"C:\Windows\System32\activeds\lsass.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:736
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Windows\System32\mfc110jpn\winlogon.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1156
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "TextInputHost" /sc ONLOGON /tr "'C:\Documents and Settings\TextInputHost.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4768
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft.NET\RedistList\dllhost.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2028
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Mail\smss.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2080
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Windows\System32\activeds\lsass.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3932
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "StartMenuExperienceHost" /sc ONLOGON /tr "'C:\Program Files (x86)\WindowsPowerShell\Modules\PackageManagement\1.0.0.1\es\StartMenuExperienceHost.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3852
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Windows\System32\ucrtbase\winlogon.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3068
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd" /sc ONLOGON /tr "'C:\Documents and Settings\3cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4480
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
MD5ed7cbc3cc36f96754bf4b4748c5998b6
SHA1ae7867de6dc05871e3e4e7d34c0231383e416dd1
SHA2563cbf0de4a009f792d15a2cdc4c31f46ee3de539493849ccc31cde03ec2d2ffdd
SHA512eac51f170a344feb0958733eaa6c6ee80b4934f1e70270f932e3593ce572d899bbe9d18e3075c394437d452a30f0341d12da8dc78080da8b93ebc08f458e4744