Analysis
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max time kernel
117s -
max time network
118s -
platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system -
submitted
19-12-2024 07:28
Behavioral task
behavioral1
Sample
7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe
Resource
win10v2004-20241007-en
General
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Target
7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe
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Size
783KB
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MD5
a01ba8b94da113abb830119dad3cfc17
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SHA1
4ccd1d3ce62f864071afdc842f9f9e4b2a4ee0a7
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SHA256
7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb
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SHA512
35a7f30941ead4d6de05bf59193624c287ab97dc24607fb229621bbc0a3aac4102ef94dac84c2b3a088276001430c14d925e085ca788657fb81967ed7b67fe3d
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SSDEEP
12288:GqnOYxdAgpoNeF91rg5iFdr0yQ9gYx+EIpakCYJRU7Q9bWoFzqK4:G+OQbpbgsFdAyQvzSqaq8qB
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 9 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 2576 2016 schtasks.exe 28 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2336 2016 schtasks.exe 28 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2740 2016 schtasks.exe 28 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2684 2016 schtasks.exe 28 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2648 2016 schtasks.exe 28 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 3020 2016 schtasks.exe 28 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2736 2016 schtasks.exe 28 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2532 2016 schtasks.exe 28 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2968 2016 schtasks.exe 28 -
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0" 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe -
resource yara_rule behavioral1/memory/1744-1-0x0000000000870000-0x000000000093A000-memory.dmp dcrat behavioral1/files/0x000600000001746a-32.dat dcrat -
Executes dropped EXE 1 IoCs
pid Process 1824 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe -
Adds Run key to start application 2 TTPs 9 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\spoolsv = "\"C:\\Windows\\System32\\mspbda\\spoolsv.exe\"" 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\lsm = "\"C:\\Windows\\System32\\KBDNO1\\lsm.exe\"" 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\wininit = "\"C:\\Windows\\System32\\bidispl\\wininit.exe\"" 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\PerfLogs\\Admin\\csrss.exe\"" 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\explorer = "\"C:\\Recovery\\1f5748e2-69f6-11ef-b486-62cb582c238c\\explorer.exe\"" 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Program Files\\Windows Defender\\csrss.exe\"" 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\lsm = "\"C:\\Windows\\System32\\wpcumi\\lsm.exe\"" 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\explorer = "\"C:\\Windows\\win\\explorer.exe\"" 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\lsass = "\"C:\\Windows\\System32\\samcli\\lsass.exe\"" 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe -
description ioc Process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe -
Drops file in System32 directory 20 IoCs
description ioc Process File created C:\Windows\System32\mspbda\spoolsv.exe 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe File opened for modification C:\Windows\System32\wpcumi\lsm.exe 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe File opened for modification C:\Windows\System32\mspbda\RCX9467.tmp 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe File opened for modification C:\Windows\System32\KBDNO1\lsm.exe 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe File opened for modification C:\Windows\System32\bidispl\RCX9AE0.tmp 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe File opened for modification C:\Windows\System32\samcli\lsass.exe 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe File created C:\Windows\System32\mspbda\f3b6ecef712a24f33798f5d2fb3790c3d9b894c4 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe File created C:\Windows\System32\KBDNO1\101b941d020240259ca4912829b53995ad543df6 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe File created C:\Windows\System32\bidispl\560854153607923c4c5f107085a7db67be01f252 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe File opened for modification C:\Windows\System32\wpcumi\RCX905F.tmp 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe File opened for modification C:\Windows\System32\KBDNO1\RCX96D8.tmp 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe File created C:\Windows\System32\samcli\lsass.exe 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe File created C:\Windows\System32\wpcumi\101b941d020240259ca4912829b53995ad543df6 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe File created C:\Windows\System32\KBDNO1\lsm.exe 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe File created C:\Windows\System32\bidispl\wininit.exe 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe File opened for modification C:\Windows\System32\samcli\RCX8E5C.tmp 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe File created C:\Windows\System32\samcli\6203df4a6bafc7c328ee7f6f8ca0a8a838a8a1b9 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe File created C:\Windows\System32\wpcumi\lsm.exe 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe File opened for modification C:\Windows\System32\mspbda\spoolsv.exe 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe File opened for modification C:\Windows\System32\bidispl\wininit.exe 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe -
Drops file in Program Files directory 4 IoCs
description ioc Process File created C:\Program Files\Windows Defender\886983d96e3d3e31032c679b2d4ea91b6c05afef 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe File opened for modification C:\Program Files\Windows Defender\RCX9263.tmp 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe File opened for modification C:\Program Files\Windows Defender\csrss.exe 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe File created C:\Program Files\Windows Defender\csrss.exe 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe -
Drops file in Windows directory 4 IoCs
description ioc Process File opened for modification C:\Windows\win\explorer.exe 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe File created C:\Windows\win\explorer.exe 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe File created C:\Windows\win\7a0fd90576e08807bde2cc57bcf9854bbce05fe3 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe File opened for modification C:\Windows\win\RCX98DC.tmp 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Scheduled Task/Job: Scheduled Task 1 TTPs 9 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 2684 schtasks.exe 2648 schtasks.exe 3020 schtasks.exe 2736 schtasks.exe 2336 schtasks.exe 2740 schtasks.exe 2532 schtasks.exe 2968 schtasks.exe 2576 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 15 IoCs
pid Process 1744 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe 1744 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe 1744 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe 1744 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe 1744 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe 1744 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe 1744 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe 1744 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe 1744 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe 1744 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe 1744 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe 1744 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe 1744 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe 1744 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe 1744 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 1744 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe Token: SeDebugPrivilege 1824 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 1744 wrote to memory of 1824 1744 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe 38 PID 1744 wrote to memory of 1824 1744 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe 38 PID 1744 wrote to memory of 1824 1744 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe 38 -
System policy modification 1 TTPs 3 IoCs
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0" 7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.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\7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe"C:\Users\Admin\AppData\Local\Temp\7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.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
- Suspicious use of WriteProcessMemory
- System policy modification
PID:1744 -
C:\Users\Admin\AppData\Local\Temp\7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe"C:\Users\Admin\AppData\Local\Temp\7bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1824
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Windows\System32\samcli\lsass.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2576
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Windows\System32\wpcumi\lsm.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2336
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Program Files\Windows Defender\csrss.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2740
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Windows\System32\mspbda\spoolsv.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2684
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Windows\System32\KBDNO1\lsm.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2648
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Windows\win\explorer.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3020
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Windows\System32\bidispl\wininit.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2736
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\PerfLogs\Admin\csrss.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2532
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Recovery\1f5748e2-69f6-11ef-b486-62cb582c238c\explorer.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2968
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
MD5a01ba8b94da113abb830119dad3cfc17
SHA14ccd1d3ce62f864071afdc842f9f9e4b2a4ee0a7
SHA2567bdc4a94cc023cd96272ecd3d7294d01b121fce48c0a80725368c95df1a14dcb
SHA51235a7f30941ead4d6de05bf59193624c287ab97dc24607fb229621bbc0a3aac4102ef94dac84c2b3a088276001430c14d925e085ca788657fb81967ed7b67fe3d