Analysis
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max time kernel
143s -
max time network
155s -
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, 01:07
Behavioral task
behavioral1
Sample
NEAS.01a66ce702b81396f987e22d5c5513a0.exe
Resource
win7-20231020-en
Behavioral task
behavioral2
Sample
NEAS.01a66ce702b81396f987e22d5c5513a0.exe
Resource
win10v2004-20231023-en
General
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Target
NEAS.01a66ce702b81396f987e22d5c5513a0.exe
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Size
783KB
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MD5
01a66ce702b81396f987e22d5c5513a0
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SHA1
007e52fa1766724d21a7305fe0f0209fb67c8fc8
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SHA256
b08756ce1a131b1b6037549e8133e5e0d85e4eccd3ca97242dfe9827138e0c67
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SHA512
a70a72d2b5f7ac3e8d08c43577257c913c054017f0c44e4bfceb308005693cfc457a7dd29d72878546f4ab8ba58b2a24632718c37e336613e18f74cda3497f16
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SSDEEP
12288:mqnOYxdAgpoNeF91rg5iFdr0yQ9gYx+EIpakCYJRU7Q9bWoFzqK:m+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 4 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 3792 2592 schtasks.exe 89 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 3052 2592 schtasks.exe 89 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 3660 2592 schtasks.exe 89 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 3060 2592 schtasks.exe 89 -
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" NEAS.01a66ce702b81396f987e22d5c5513a0.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0" NEAS.01a66ce702b81396f987e22d5c5513a0.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" NEAS.01a66ce702b81396f987e22d5c5513a0.exe -
resource yara_rule behavioral2/memory/4076-0-0x0000000000890000-0x000000000095A000-memory.dmp dcrat behavioral2/files/0x0009000000022e11-35.dat dcrat -
Adds Run key to start application 2 TTPs 4 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\backgroundTaskHost = "\"C:\\PerfLogs\\backgroundTaskHost.exe\"" NEAS.01a66ce702b81396f987e22d5c5513a0.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\explorer = "\"C:\\Windows\\bootstat\\explorer.exe\"" NEAS.01a66ce702b81396f987e22d5c5513a0.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SearchApp = "\"C:\\Program Files\\Google\\Chrome\\Application\\SearchApp.exe\"" NEAS.01a66ce702b81396f987e22d5c5513a0.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\OfficeClickToRun = "\"C:\\Recovery\\WindowsRE\\OfficeClickToRun.exe\"" NEAS.01a66ce702b81396f987e22d5c5513a0.exe -
description ioc Process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA NEAS.01a66ce702b81396f987e22d5c5513a0.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" NEAS.01a66ce702b81396f987e22d5c5513a0.exe -
Drops file in System32 directory 2 IoCs
description ioc Process File created C:\Windows\System32\moshostcore\taskhostw.exe NEAS.01a66ce702b81396f987e22d5c5513a0.exe File created C:\Windows\System32\moshostcore\ea9f0e6c9e2dcd4dfacdaf29ba21541fb815a988 NEAS.01a66ce702b81396f987e22d5c5513a0.exe -
Drops file in Program Files directory 2 IoCs
description ioc Process File created C:\Program Files\Google\Chrome\Application\SearchApp.exe NEAS.01a66ce702b81396f987e22d5c5513a0.exe File created C:\Program Files\Google\Chrome\Application\38384e6a620884a6b69bcc56f80d556f9200171c NEAS.01a66ce702b81396f987e22d5c5513a0.exe -
Drops file in Windows directory 2 IoCs
description ioc Process File created C:\Windows\bootstat\explorer.exe NEAS.01a66ce702b81396f987e22d5c5513a0.exe File created C:\Windows\bootstat\7a0fd90576e08807bde2cc57bcf9854bbce05fe3 NEAS.01a66ce702b81396f987e22d5c5513a0.exe -
Creates scheduled task(s) 1 TTPs 4 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 3792 schtasks.exe 3052 schtasks.exe 3660 schtasks.exe 3060 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 7 IoCs
pid Process 4076 NEAS.01a66ce702b81396f987e22d5c5513a0.exe 4076 NEAS.01a66ce702b81396f987e22d5c5513a0.exe 4076 NEAS.01a66ce702b81396f987e22d5c5513a0.exe 4076 NEAS.01a66ce702b81396f987e22d5c5513a0.exe 4076 NEAS.01a66ce702b81396f987e22d5c5513a0.exe 4076 NEAS.01a66ce702b81396f987e22d5c5513a0.exe 4076 NEAS.01a66ce702b81396f987e22d5c5513a0.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 4076 NEAS.01a66ce702b81396f987e22d5c5513a0.exe -
System policy modification 1 TTPs 3 IoCs
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0" NEAS.01a66ce702b81396f987e22d5c5513a0.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" NEAS.01a66ce702b81396f987e22d5c5513a0.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" NEAS.01a66ce702b81396f987e22d5c5513a0.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.01a66ce702b81396f987e22d5c5513a0.exe"C:\Users\Admin\AppData\Local\Temp\NEAS.01a66ce702b81396f987e22d5c5513a0.exe"1⤵
- 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
- System policy modification
PID:4076
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "backgroundTaskHost" /sc ONLOGON /tr "'C:\PerfLogs\backgroundTaskHost.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3792
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Windows\bootstat\explorer.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3052
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "SearchApp" /sc ONLOGON /tr "'C:\Program Files\Google\Chrome\Application\SearchApp.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3660
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "OfficeClickToRun" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\OfficeClickToRun.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3060
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
MD501a66ce702b81396f987e22d5c5513a0
SHA1007e52fa1766724d21a7305fe0f0209fb67c8fc8
SHA256b08756ce1a131b1b6037549e8133e5e0d85e4eccd3ca97242dfe9827138e0c67
SHA512a70a72d2b5f7ac3e8d08c43577257c913c054017f0c44e4bfceb308005693cfc457a7dd29d72878546f4ab8ba58b2a24632718c37e336613e18f74cda3497f16