Analysis
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max time kernel
188s -
max time network
206s -
platform
windows10-2004_x64 -
resource
win10v2004-20231023-en -
resource tags
arch:x64arch:x86image:win10v2004-20231023-enlocale:en-usos:windows10-2004-x64system -
submitted
18/11/2023, 02:32
Behavioral task
behavioral1
Sample
NEAS.93db67acc5572ee4096c1d1962766430.exe
Resource
win7-20231020-en
Behavioral task
behavioral2
Sample
NEAS.93db67acc5572ee4096c1d1962766430.exe
Resource
win10v2004-20231023-en
General
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Target
NEAS.93db67acc5572ee4096c1d1962766430.exe
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Size
783KB
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MD5
93db67acc5572ee4096c1d1962766430
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SHA1
811ef2712a3b2a757b0efcd7fdb95cdea777111d
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SHA256
b87a60099a45285a03886378f0786131c3fa551bd84bd6134f858703d17ab74a
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SHA512
cc30b4df6ed1142b4344081f1ab19abc82f3556556871e540cac9149ab70465a35cc4d9224d9664b87bc4063d5b2f9b9fdb2c493b89c400a76bd25fb0dbaf6e8
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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 6 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 312 3404 schtasks.exe 85 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 3500 3404 schtasks.exe 85 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 888 3404 schtasks.exe 85 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 1952 3404 schtasks.exe 85 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 1648 3404 schtasks.exe 85 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 4052 3404 schtasks.exe 85 -
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" NEAS.93db67acc5572ee4096c1d1962766430.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" NEAS.93db67acc5572ee4096c1d1962766430.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0" NEAS.93db67acc5572ee4096c1d1962766430.exe -
resource yara_rule behavioral2/memory/3172-0-0x00000000001C0000-0x000000000028A000-memory.dmp dcrat behavioral2/files/0x0006000000022de4-34.dat dcrat -
Adds Run key to start application 2 TTPs 6 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\backgroundTaskHost = "\"C:\\Windows\\System32\\framedynos\\backgroundTaskHost.exe\"" NEAS.93db67acc5572ee4096c1d1962766430.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WmiPrvSE = "\"C:\\Windows\\System32\\wbem\\cimdmtf\\WmiPrvSE.exe\"" NEAS.93db67acc5572ee4096c1d1962766430.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\NEAS.93db67acc5572ee4096c1d1962766430 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\AdobeSFX\\NEAS.93db67acc5572ee4096c1d1962766430.exe\"" NEAS.93db67acc5572ee4096c1d1962766430.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\System = "\"C:\\odt\\System.exe\"" NEAS.93db67acc5572ee4096c1d1962766430.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\RuntimeBroker = "\"C:\\ProgramData\\Adobe\\Setup\\RuntimeBroker.exe\"" NEAS.93db67acc5572ee4096c1d1962766430.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\TextInputHost = "\"C:\\Windows\\SystemApps\\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\\InputApp\\LayoutData\\TextInputHost.exe\"" NEAS.93db67acc5572ee4096c1d1962766430.exe -
description ioc Process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA NEAS.93db67acc5572ee4096c1d1962766430.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" NEAS.93db67acc5572ee4096c1d1962766430.exe -
Drops file in System32 directory 4 IoCs
description ioc Process File created C:\Windows\System32\framedynos\backgroundTaskHost.exe NEAS.93db67acc5572ee4096c1d1962766430.exe File created C:\Windows\System32\framedynos\eddb19405b7ce1152b3e19997f2b467f0b72b3d3 NEAS.93db67acc5572ee4096c1d1962766430.exe File created C:\Windows\System32\wbem\cimdmtf\WmiPrvSE.exe NEAS.93db67acc5572ee4096c1d1962766430.exe File created C:\Windows\System32\wbem\cimdmtf\24dbde2999530ef5fd907494bc374d663924116c NEAS.93db67acc5572ee4096c1d1962766430.exe -
Drops file in Windows directory 3 IoCs
description ioc Process File opened for modification C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\InputApp\LayoutData\TextInputHost.exe NEAS.93db67acc5572ee4096c1d1962766430.exe File created C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\InputApp\LayoutData\22eafd247d37c30fed3795ee41d259ec72bb351c NEAS.93db67acc5572ee4096c1d1962766430.exe File created C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\InputApp\LayoutData\TextInputHost.exe NEAS.93db67acc5572ee4096c1d1962766430.exe -
Creates scheduled task(s) 1 TTPs 6 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 3500 schtasks.exe 888 schtasks.exe 1952 schtasks.exe 1648 schtasks.exe 4052 schtasks.exe 312 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 10 IoCs
pid Process 3172 NEAS.93db67acc5572ee4096c1d1962766430.exe 3172 NEAS.93db67acc5572ee4096c1d1962766430.exe 3172 NEAS.93db67acc5572ee4096c1d1962766430.exe 3172 NEAS.93db67acc5572ee4096c1d1962766430.exe 3172 NEAS.93db67acc5572ee4096c1d1962766430.exe 3172 NEAS.93db67acc5572ee4096c1d1962766430.exe 3172 NEAS.93db67acc5572ee4096c1d1962766430.exe 3172 NEAS.93db67acc5572ee4096c1d1962766430.exe 3172 NEAS.93db67acc5572ee4096c1d1962766430.exe 3172 NEAS.93db67acc5572ee4096c1d1962766430.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 3172 NEAS.93db67acc5572ee4096c1d1962766430.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.93db67acc5572ee4096c1d1962766430.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" NEAS.93db67acc5572ee4096c1d1962766430.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0" NEAS.93db67acc5572ee4096c1d1962766430.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.93db67acc5572ee4096c1d1962766430.exe"C:\Users\Admin\AppData\Local\Temp\NEAS.93db67acc5572ee4096c1d1962766430.exe"1⤵
- 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
- System policy modification
PID:3172
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "TextInputHost" /sc ONLOGON /tr "'C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\InputApp\LayoutData\TextInputHost.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:312
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "backgroundTaskHost" /sc ONLOGON /tr "'C:\Windows\System32\framedynos\backgroundTaskHost.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3500
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Windows\System32\wbem\cimdmtf\WmiPrvSE.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:888
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "NEAS.93db67acc5572ee4096c1d1962766430" /sc ONLOGON /tr "'C:\Users\Admin\AppData\Local\Temp\AdobeSFX\NEAS.93db67acc5572ee4096c1d1962766430.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1952
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\odt\System.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1648
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\ProgramData\Adobe\Setup\RuntimeBroker.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4052
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
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Downloads
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Filesize
783KB
MD593db67acc5572ee4096c1d1962766430
SHA1811ef2712a3b2a757b0efcd7fdb95cdea777111d
SHA256b87a60099a45285a03886378f0786131c3fa551bd84bd6134f858703d17ab74a
SHA512cc30b4df6ed1142b4344081f1ab19abc82f3556556871e540cac9149ab70465a35cc4d9224d9664b87bc4063d5b2f9b9fdb2c493b89c400a76bd25fb0dbaf6e8