Analysis
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max time kernel
93s -
max time network
95s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
23-01-2025 01:39
Behavioral task
behavioral1
Sample
40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe
Resource
win10v2004-20241007-en
General
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Target
40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe
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Size
783KB
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MD5
284f614242b459699b4f93b34bcea38a
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SHA1
496d71d236c11b794dd355f3e76614c839971d42
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SHA256
40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad
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SHA512
398d9ade2bc0a108906784b85160396feed4a80586ac47d70db1079f7dfbdb728debf687164d36db9014a2c2cf1f47be33faa6c33644a3c44ec6f05c4ead74df
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SSDEEP
12288:mqnOYxdAgpoNeF91rg5iFdr0yQ9gYx+EIpakCYJRU7Q9bWoFzqKt:m+OQbpbgsFdAyQvzSqaq8q8
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 10 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 3092 440 schtasks.exe 83 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 1708 440 schtasks.exe 83 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 1744 440 schtasks.exe 83 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 388 440 schtasks.exe 83 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 212 440 schtasks.exe 83 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 3276 440 schtasks.exe 83 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2016 440 schtasks.exe 83 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 3472 440 schtasks.exe 83 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 1228 440 schtasks.exe 83 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 3948 440 schtasks.exe 83 -
UAC bypass 3 TTPs 3 IoCs
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0" 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe -
resource yara_rule behavioral2/memory/1016-1-0x00000000003C0000-0x000000000048A000-memory.dmp dcrat behavioral2/files/0x0007000000023c95-33.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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe -
Executes dropped EXE 1 IoCs
pid Process 1664 RuntimeBroker.exe -
Adds Run key to start application 2 TTPs 10 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\explorer = "\"C:\\Windows\\system\\explorer.exe\"" 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\RuntimeBroker = "\"C:\\Windows\\System32\\ACPBackgroundManagerPolicy\\RuntimeBroker.exe\"" 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Idle = "\"C:\\Recovery\\WindowsRE\\Idle.exe\"" 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\smss = "\"C:\\ProgramData\\WindowsHolographicDevices\\SpatialStore\\smss.exe\"" 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SearchApp = "\"C:\\Windows\\SystemApps\\Microsoft.Windows.Search_cw5n1h2txyewy\\DefaultSettings\\SearchApp.exe\"" 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dllhost = "\"C:\\PerfLogs\\dllhost.exe\"" 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\spoolsv = "\"C:\\Windows\\System32\\bisrv\\spoolsv.exe\"" 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\taskhostw = "\"C:\\Documents and Settings\\taskhostw.exe\"" 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\RuntimeBroker = "\"C:\\Program Files (x86)\\Google\\Update\\1.3.36.371\\RuntimeBroker.exe\"" 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\RuntimeBroker = "\"C:\\Recovery\\WindowsRE\\RuntimeBroker.exe\"" 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe -
Checks whether UAC is enabled 1 TTPs 2 IoCs
description ioc Process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe -
Drops file in System32 directory 8 IoCs
description ioc Process File opened for modification C:\Windows\System32\ACPBackgroundManagerPolicy\RuntimeBroker.exe 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe File opened for modification C:\Windows\System32\bisrv\RCXB495.tmp 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe File opened for modification C:\Windows\System32\bisrv\spoolsv.exe 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe File created C:\Windows\System32\ACPBackgroundManagerPolicy\RuntimeBroker.exe 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe File created C:\Windows\System32\ACPBackgroundManagerPolicy\9e8d7a4ca61bd92aff00cc37a7a4d62a2cac998d 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe File created C:\Windows\System32\bisrv\spoolsv.exe 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe File created C:\Windows\System32\bisrv\f3b6ecef712a24f33798f5d2fb3790c3d9b894c4 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe File opened for modification C:\Windows\System32\ACPBackgroundManagerPolicy\RCXA879.tmp 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe -
Drops file in Program Files directory 4 IoCs
description ioc Process File created C:\Program Files (x86)\Google\Update\1.3.36.371\RuntimeBroker.exe 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe File created C:\Program Files (x86)\Google\Update\1.3.36.371\9e8d7a4ca61bd92aff00cc37a7a4d62a2cac998d 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe File opened for modification C:\Program Files (x86)\Google\Update\1.3.36.371\RCXA674.tmp 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe File opened for modification C:\Program Files (x86)\Google\Update\1.3.36.371\RuntimeBroker.exe 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe -
Drops file in Windows directory 8 IoCs
description ioc Process File opened for modification C:\Windows\system\explorer.exe 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe File created C:\Windows\system\7a0fd90576e08807bde2cc57bcf9854bbce05fe3 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe File created C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\DefaultSettings\SearchApp.exe 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe File created C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\DefaultSettings\38384e6a620884a6b69bcc56f80d556f9200171c 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe File opened for modification C:\Windows\system\RCXA24C.tmp 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe File opened for modification C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\DefaultSettings\RCXB08B.tmp 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe File opened for modification C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\DefaultSettings\SearchApp.exe 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe File created C:\Windows\system\explorer.exe 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.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\ 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe -
Scheduled Task/Job: Scheduled Task 1 TTPs 10 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 3472 schtasks.exe 1228 schtasks.exe 3948 schtasks.exe 3092 schtasks.exe 388 schtasks.exe 212 schtasks.exe 2016 schtasks.exe 1708 schtasks.exe 1744 schtasks.exe 3276 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 21 IoCs
pid Process 1016 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe 1016 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe 1016 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe 1016 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe 1016 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe 1016 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe 1016 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe 1016 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe 1016 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe 1016 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe 1016 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe 1016 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe 1016 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe 1016 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe 1016 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe 1016 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe 1016 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe 1016 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe 1016 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe 1016 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe 1016 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 1016 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe Token: SeDebugPrivilege 1664 RuntimeBroker.exe -
Suspicious use of WriteProcessMemory 2 IoCs
description pid Process procid_target PID 1016 wrote to memory of 1664 1016 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe 95 PID 1016 wrote to memory of 1664 1016 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe 95 -
System policy modification 1 TTPs 3 IoCs
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0" 40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.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\40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.exe"C:\Users\Admin\AppData\Local\Temp\40ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad.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
- Drops file in Windows directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
PID:1016 -
C:\Recovery\WindowsRE\RuntimeBroker.exe"C:\Recovery\WindowsRE\RuntimeBroker.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1664
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Windows\system\explorer.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3092
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "taskhostw" /sc ONLOGON /tr "'C:\Documents and Settings\taskhostw.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1708
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Program Files (x86)\Google\Update\1.3.36.371\RuntimeBroker.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1744
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\System32\ACPBackgroundManagerPolicy\RuntimeBroker.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:388
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\Idle.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:212
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\RuntimeBroker.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3276
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\ProgramData\WindowsHolographicDevices\SpatialStore\smss.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2016
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "SearchApp" /sc ONLOGON /tr "'C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\DefaultSettings\SearchApp.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3472
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\PerfLogs\dllhost.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1228
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Windows\System32\bisrv\spoolsv.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3948
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
MD5284f614242b459699b4f93b34bcea38a
SHA1496d71d236c11b794dd355f3e76614c839971d42
SHA25640ff13f7d3616f322000142cda7b432b45ea18df020c0dcfc1455202d67ad0ad
SHA512398d9ade2bc0a108906784b85160396feed4a80586ac47d70db1079f7dfbdb728debf687164d36db9014a2c2cf1f47be33faa6c33644a3c44ec6f05c4ead74df