Analysis
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max time kernel
141s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20231025-en -
resource tags
arch:x64arch:x86image:win10v2004-20231025-enlocale:en-usos:windows10-2004-x64system -
submitted
18/11/2023, 02:37
Behavioral task
behavioral1
Sample
NEAS.d316c5acd7974aaa1cab464245b38ac0.exe
Resource
win7-20231025-en
Behavioral task
behavioral2
Sample
NEAS.d316c5acd7974aaa1cab464245b38ac0.exe
Resource
win10v2004-20231025-en
General
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Target
NEAS.d316c5acd7974aaa1cab464245b38ac0.exe
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Size
783KB
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MD5
d316c5acd7974aaa1cab464245b38ac0
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SHA1
9c7636717bb1063e0801a769aeef01bf15af1bb4
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SHA256
b55e235214350f8fe2b3e870aa318e1eefc3cbf7c29f4109e7944e32bb99d43d
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SHA512
c1251f6f48c716f167842262de085290f8aaff08ee4f676f8d47424ca2020326bf0b49a0c700e6b373c4200c5a4b4ca8b2f0105c2dccab74c4a4308b46d59a4b
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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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Process spawned unexpected child process 3 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 852 1732 schtasks.exe 86 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 4204 1732 schtasks.exe 86 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 3004 1732 schtasks.exe 86 -
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" NEAS.d316c5acd7974aaa1cab464245b38ac0.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0" NEAS.d316c5acd7974aaa1cab464245b38ac0.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" NEAS.d316c5acd7974aaa1cab464245b38ac0.exe -
resource yara_rule behavioral2/memory/2712-0-0x0000000000470000-0x000000000053A000-memory.dmp dcrat behavioral2/files/0x0006000000022e19-37.dat dcrat -
Adds Run key to start application 2 TTPs 3 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\OfficeClickToRun = "\"C:\\Program Files\\Common Files\\microsoft shared\\ClickToRun\\C2RINTL.et-ee\\OfficeClickToRun.exe\"" NEAS.d316c5acd7974aaa1cab464245b38ac0.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\sysmon = "\"C:\\Windows\\Speech_OneCore\\Engines\\SR\\en-US-N\\sysmon.exe\"" NEAS.d316c5acd7974aaa1cab464245b38ac0.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\StartMenuExperienceHost = "\"C:\\Windows\\SystemApps\\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\\AppxSignature\\StartMenuExperienceHost.exe\"" NEAS.d316c5acd7974aaa1cab464245b38ac0.exe -
description ioc Process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA NEAS.d316c5acd7974aaa1cab464245b38ac0.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" NEAS.d316c5acd7974aaa1cab464245b38ac0.exe -
Drops file in Program Files directory 2 IoCs
description ioc Process File created C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.et-ee\OfficeClickToRun.exe NEAS.d316c5acd7974aaa1cab464245b38ac0.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.et-ee\e6c9b481da804f07baff8eff543b0a1441069b5d NEAS.d316c5acd7974aaa1cab464245b38ac0.exe -
Drops file in Windows directory 6 IoCs
description ioc Process File opened for modification C:\Windows\Speech_OneCore\Engines\SR\en-US-N\RCXAE61.tmp NEAS.d316c5acd7974aaa1cab464245b38ac0.exe File created C:\Windows\Speech_OneCore\Engines\SR\en-US-N\sysmon.exe NEAS.d316c5acd7974aaa1cab464245b38ac0.exe File opened for modification C:\Windows\Speech_OneCore\Engines\SR\en-US-N\sysmon.exe NEAS.d316c5acd7974aaa1cab464245b38ac0.exe File created C:\Windows\Speech_OneCore\Engines\SR\en-US-N\121e5b5079f7c0e46d90f99b3864022518bbbda9 NEAS.d316c5acd7974aaa1cab464245b38ac0.exe File created C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\AppxSignature\StartMenuExperienceHost.exe NEAS.d316c5acd7974aaa1cab464245b38ac0.exe File created C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\AppxSignature\55b276f4edf653fe07efe8f1ecc32d3d195abd16 NEAS.d316c5acd7974aaa1cab464245b38ac0.exe -
Creates scheduled task(s) 1 TTPs 3 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 852 schtasks.exe 4204 schtasks.exe 3004 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 10 IoCs
pid Process 2712 NEAS.d316c5acd7974aaa1cab464245b38ac0.exe 2712 NEAS.d316c5acd7974aaa1cab464245b38ac0.exe 2712 NEAS.d316c5acd7974aaa1cab464245b38ac0.exe 2712 NEAS.d316c5acd7974aaa1cab464245b38ac0.exe 2712 NEAS.d316c5acd7974aaa1cab464245b38ac0.exe 2712 NEAS.d316c5acd7974aaa1cab464245b38ac0.exe 2712 NEAS.d316c5acd7974aaa1cab464245b38ac0.exe 2712 NEAS.d316c5acd7974aaa1cab464245b38ac0.exe 2712 NEAS.d316c5acd7974aaa1cab464245b38ac0.exe 2712 NEAS.d316c5acd7974aaa1cab464245b38ac0.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 2712 NEAS.d316c5acd7974aaa1cab464245b38ac0.exe -
System policy modification 1 TTPs 3 IoCs
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" NEAS.d316c5acd7974aaa1cab464245b38ac0.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" NEAS.d316c5acd7974aaa1cab464245b38ac0.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0" NEAS.d316c5acd7974aaa1cab464245b38ac0.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\NEAS.d316c5acd7974aaa1cab464245b38ac0.exe"C:\Users\Admin\AppData\Local\Temp\NEAS.d316c5acd7974aaa1cab464245b38ac0.exe"1⤵
- UAC bypass
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- System policy modification
PID:2712
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\Windows\Speech_OneCore\Engines\SR\en-US-N\sysmon.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:852
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "StartMenuExperienceHost" /sc ONLOGON /tr "'C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\AppxSignature\StartMenuExperienceHost.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4204
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "OfficeClickToRun" /sc ONLOGON /tr "'C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.et-ee\OfficeClickToRun.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3004
Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
783KB
MD5d316c5acd7974aaa1cab464245b38ac0
SHA19c7636717bb1063e0801a769aeef01bf15af1bb4
SHA256b55e235214350f8fe2b3e870aa318e1eefc3cbf7c29f4109e7944e32bb99d43d
SHA512c1251f6f48c716f167842262de085290f8aaff08ee4f676f8d47424ca2020326bf0b49a0c700e6b373c4200c5a4b4ca8b2f0105c2dccab74c4a4308b46d59a4b