dcrat | bb00399cf42ca87f984e2cfce9ffeeb514c66f24036a305989ecddca7857cf62

Analysis

max time kernel
79s
max time network
153s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
31/03/2023, 17:51

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General

Target
1bfc612d584aa106f9784450c67dd4b7.exe
Size 1.4MB
Sample230331-we54eade6s
SHA256 bb00399cf42ca87f984e2cfce9ffeeb514c66f24036a305989ecddca7857cf62
MD5 1bfc612d584aa106f9784450c67dd4b7
SHA1 75edc8a7f8826ba38184b991a06f06c736358b74
SHA512 ae13f63cda3eb141b41749092b390451e4e353197e711172a07701f77d0c58596d69c5d222bb125f806e37ad4f8e588e35f12f6655c916ddd274b4b3af418242
SSDEEP 24576:DWPT5MjX0kvAwQwWdsWC1/Owi6Tn503L9CajagUG:DoTOjJvAXxC12wVT50bcrv
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

dcrat infostealer persistence rat

Malware Config

Signatures

DcRat
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
rat infostealer dcrat

Modifies WinLogon for persistence 2 TTPs 7 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\MSOCache\\All Users\\{90140000-0044-0409-0000-0000000FF1CE}-C\\System.exe\", \"C:\\Users\\Admin\\taskhost.exe\", \"C:\\Windows\\Globalization\\WMIADAP.exe\", \"C:\\Program Files (x86)\\Windows Photo Viewer\\de-DE\\spoolsv.exe\", \"C:\\Program Files (x86)\\Microsoft Synchronization Services\\ADO.NET\\v1.0\\Idle.exe\""	1bfc612d584aa106f9784450c67dd4b7.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\MSOCache\\All Users\\{90140000-0044-0409-0000-0000000FF1CE}-C\\System.exe\", \"C:\\Users\\Admin\\taskhost.exe\", \"C:\\Windows\\Globalization\\WMIADAP.exe\", \"C:\\Program Files (x86)\\Windows Photo Viewer\\de-DE\\spoolsv.exe\", \"C:\\Program Files (x86)\\Microsoft Synchronization Services\\ADO.NET\\v1.0\\Idle.exe\", \"C:\\Program Files (x86)\\Windows NT\\TableTextService\\fr-FR\\Idle.exe\""	1bfc612d584aa106f9784450c67dd4b7.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\MSOCache\\All Users\\{90140000-0044-0409-0000-0000000FF1CE}-C\\System.exe\", \"C:\\Users\\Admin\\taskhost.exe\", \"C:\\Windows\\Globalization\\WMIADAP.exe\", \"C:\\Program Files (x86)\\Windows Photo Viewer\\de-DE\\spoolsv.exe\", \"C:\\Program Files (x86)\\Microsoft Synchronization Services\\ADO.NET\\v1.0\\Idle.exe\", \"C:\\Program Files (x86)\\Windows NT\\TableTextService\\fr-FR\\Idle.exe\", \"C:\\Program Files\\Windows Sidebar\\Shared Gadgets\\csrss.exe\""	1bfc612d584aa106f9784450c67dd4b7.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\MSOCache\\All Users\\{90140000-0044-0409-0000-0000000FF1CE}-C\\System.exe\""	1bfc612d584aa106f9784450c67dd4b7.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\MSOCache\\All Users\\{90140000-0044-0409-0000-0000000FF1CE}-C\\System.exe\", \"C:\\Users\\Admin\\taskhost.exe\""	1bfc612d584aa106f9784450c67dd4b7.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\MSOCache\\All Users\\{90140000-0044-0409-0000-0000000FF1CE}-C\\System.exe\", \"C:\\Users\\Admin\\taskhost.exe\", \"C:\\Windows\\Globalization\\WMIADAP.exe\""	1bfc612d584aa106f9784450c67dd4b7.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\MSOCache\\All Users\\{90140000-0044-0409-0000-0000000FF1CE}-C\\System.exe\", \"C:\\Users\\Admin\\taskhost.exe\", \"C:\\Windows\\Globalization\\WMIADAP.exe\", \"C:\\Program Files (x86)\\Windows Photo Viewer\\de-DE\\spoolsv.exe\""	1bfc612d584aa106f9784450c67dd4b7.exe

Process spawned unexpected child process 21 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	860	1104	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	852	1104	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	672	1104	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1556	1104	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1040	1104	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1068	1104	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	676	1104	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1248	1104	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1152	1104	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1240	1104	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	832	1104	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1076	1104	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1084	1104	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1680	1104	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	884	1104	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1216	1104	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2016	1104	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1592	1104	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1196	1104	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	580	1104	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	764	1104	schtasks.exe	28

DCRat payload 6 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/memory/1320-54-0x0000000000210000-0x0000000000378000-memory.dmp	dcrat
behavioral1/files/0x0007000000013a34-71.dat	dcrat
behavioral1/files/0x000600000001420f-81.dat	dcrat
behavioral1/files/0x000600000001420f-82.dat	dcrat
behavioral1/memory/1544-83-0x00000000009A0000-0x0000000000B08000-memory.dmp	dcrat
behavioral1/memory/1544-103-0x000000001AC50000-0x000000001ACD0000-memory.dmp	dcrat

Executes dropped EXE 1 IoCs

pid	Process
1544	csrss.exe

Adds Run key to start application 2 TTPs 14 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Program Files\\Windows Sidebar\\Shared Gadgets\\csrss.exe\""	1bfc612d584aa106f9784450c67dd4b7.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\taskhost = "\"C:\\Users\\Admin\\taskhost.exe\""	1bfc612d584aa106f9784450c67dd4b7.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\spoolsv = "\"C:\\Program Files (x86)\\Windows Photo Viewer\\de-DE\\spoolsv.exe\""	1bfc612d584aa106f9784450c67dd4b7.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000\Software\Microsoft\Windows\CurrentVersion\Run\Idle = "\"C:\\Program Files (x86)\\Windows NT\\TableTextService\\fr-FR\\Idle.exe\""	1bfc612d584aa106f9784450c67dd4b7.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\System = "\"C:\\MSOCache\\All Users\\{90140000-0044-0409-0000-0000000FF1CE}-C\\System.exe\""	1bfc612d584aa106f9784450c67dd4b7.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000\Software\Microsoft\Windows\CurrentVersion\Run\taskhost = "\"C:\\Users\\Admin\\taskhost.exe\""	1bfc612d584aa106f9784450c67dd4b7.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000\Software\Microsoft\Windows\CurrentVersion\Run\spoolsv = "\"C:\\Program Files (x86)\\Windows Photo Viewer\\de-DE\\spoolsv.exe\""	1bfc612d584aa106f9784450c67dd4b7.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000\Software\Microsoft\Windows\CurrentVersion\Run\Idle = "\"C:\\Program Files (x86)\\Microsoft Synchronization Services\\ADO.NET\\v1.0\\Idle.exe\""	1bfc612d584aa106f9784450c67dd4b7.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Idle = "\"C:\\Program Files (x86)\\Microsoft Synchronization Services\\ADO.NET\\v1.0\\Idle.exe\""	1bfc612d584aa106f9784450c67dd4b7.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Idle = "\"C:\\Program Files (x86)\\Windows NT\\TableTextService\\fr-FR\\Idle.exe\""	1bfc612d584aa106f9784450c67dd4b7.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000\Software\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Program Files\\Windows Sidebar\\Shared Gadgets\\csrss.exe\""	1bfc612d584aa106f9784450c67dd4b7.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000\Software\Microsoft\Windows\CurrentVersion\Run\System = "\"C:\\MSOCache\\All Users\\{90140000-0044-0409-0000-0000000FF1CE}-C\\System.exe\""	1bfc612d584aa106f9784450c67dd4b7.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000\Software\Microsoft\Windows\CurrentVersion\Run\WMIADAP = "\"C:\\Windows\\Globalization\\WMIADAP.exe\""	1bfc612d584aa106f9784450c67dd4b7.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WMIADAP = "\"C:\\Windows\\Globalization\\WMIADAP.exe\""	1bfc612d584aa106f9784450c67dd4b7.exe

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
6	ipinfo.io
7	ipinfo.io

Drops file in Program Files directory 8 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Windows Photo Viewer\de-DE\spoolsv.exe	1bfc612d584aa106f9784450c67dd4b7.exe
File created	C:\Program Files (x86)\Windows Photo Viewer\de-DE\f3b6ecef712a24	1bfc612d584aa106f9784450c67dd4b7.exe
File created	C:\Program Files (x86)\Microsoft Synchronization Services\ADO.NET\v1.0\Idle.exe	1bfc612d584aa106f9784450c67dd4b7.exe
File created	C:\Program Files (x86)\Microsoft Synchronization Services\ADO.NET\v1.0\6ccacd8608530f	1bfc612d584aa106f9784450c67dd4b7.exe
File created	C:\Program Files (x86)\Windows NT\TableTextService\fr-FR\Idle.exe	1bfc612d584aa106f9784450c67dd4b7.exe
File created	C:\Program Files (x86)\Windows NT\TableTextService\fr-FR\6ccacd8608530f	1bfc612d584aa106f9784450c67dd4b7.exe
File created	C:\Program Files\Windows Sidebar\Shared Gadgets\csrss.exe	1bfc612d584aa106f9784450c67dd4b7.exe
File created	C:\Program Files\Windows Sidebar\Shared Gadgets\886983d96e3d3e	1bfc612d584aa106f9784450c67dd4b7.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Globalization\WMIADAP.exe	1bfc612d584aa106f9784450c67dd4b7.exe
File created	C:\Windows\Globalization\75a57c1bdf437c	1bfc612d584aa106f9784450c67dd4b7.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 21 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
860	schtasks.exe
672	schtasks.exe
832	schtasks.exe
1084	schtasks.exe
1680	schtasks.exe
580	schtasks.exe
764	schtasks.exe
852	schtasks.exe
1556	schtasks.exe
1076	schtasks.exe
1216	schtasks.exe
1040	schtasks.exe
676	schtasks.exe
1248	schtasks.exe
1152	schtasks.exe
884	schtasks.exe
2016	schtasks.exe
1196	schtasks.exe
1068	schtasks.exe
1240	schtasks.exe
1592	schtasks.exe

Modifies system certificate store 2 TTPs 6 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8	csrss.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8\Blob = 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	csrss.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13	csrss.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13\Blob = 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	csrss.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13\Blob = 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	csrss.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13\Blob = 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	csrss.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
1320	1bfc612d584aa106f9784450c67dd4b7.exe
1544	csrss.exe
1544	csrss.exe
1544	csrss.exe
1544	csrss.exe
1544	csrss.exe
1544	csrss.exe
1544	csrss.exe
1544	csrss.exe
1544	csrss.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1320	1bfc612d584aa106f9784450c67dd4b7.exe
Token: SeDebugPrivilege	1544	csrss.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1320 wrote to memory of 1544	1320	1bfc612d584aa106f9784450c67dd4b7.exe	50
PID 1320 wrote to memory of 1544	1320	1bfc612d584aa106f9784450c67dd4b7.exe	50
PID 1320 wrote to memory of 1544	1320	1bfc612d584aa106f9784450c67dd4b7.exe	50

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.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\1bfc612d584aa106f9784450c67dd4b7.exe
"C:\Users\Admin\AppData\Local\Temp\1bfc612d584aa106f9784450c67dd4b7.exe"
1⤵
- Modifies WinLogon for persistence
- Adds Run key to start application
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1320
- C:\Program Files\Windows Sidebar\Shared Gadgets\csrss.exe
  "C:\Program Files\Windows Sidebar\Shared Gadgets\csrss.exe"
  2⤵
  - Executes dropped EXE
  - Modifies system certificate store
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1544

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 7 /tr "'C:\MSOCache\All Users\{90140000-0044-0409-0000-0000000FF1CE}-C\System.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:860

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0044-0409-0000-0000000FF1CE}-C\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:852

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 6 /tr "'C:\MSOCache\All Users\{90140000-0044-0409-0000-0000000FF1CE}-C\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:672

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 14 /tr "'C:\Users\Admin\taskhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1556

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\Users\Admin\taskhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1040

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 9 /tr "'C:\Users\Admin\taskhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1068

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WMIADAPW" /sc MINUTE /mo 8 /tr "'C:\Windows\Globalization\WMIADAP.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:676

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WMIADAP" /sc ONLOGON /tr "'C:\Windows\Globalization\WMIADAP.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1248

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WMIADAPW" /sc MINUTE /mo 5 /tr "'C:\Windows\Globalization\WMIADAP.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1152

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\Windows Photo Viewer\de-DE\spoolsv.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1240

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Photo Viewer\de-DE\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:832

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Windows Photo Viewer\de-DE\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1076

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Microsoft Synchronization Services\ADO.NET\v1.0\Idle.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1084

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft Synchronization Services\ADO.NET\v1.0\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1680

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\Microsoft Synchronization Services\ADO.NET\v1.0\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:884

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Windows NT\TableTextService\fr-FR\Idle.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1216

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows NT\TableTextService\fr-FR\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2016

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Windows NT\TableTextService\fr-FR\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1592

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 8 /tr "'C:\Program Files\Windows Sidebar\Shared Gadgets\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1196

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Program Files\Windows Sidebar\Shared Gadgets\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:580

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 14 /tr "'C:\Program Files\Windows Sidebar\Shared Gadgets\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:764

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Winlogon Helper DLL

T1004

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Install Root Certificate

T1130

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

Idle.exe

Path C:\Program Files (x86)\Microsoft Synchronization Services\ADO.NET\v1.0\Idle.exe
Size 1.4MB
SHA256 bb00399cf42ca87f984e2cfce9ffeeb514c66f24036a305989ecddca7857cf62
MD5 1bfc612d584aa106f9784450c67dd4b7
SHA1 75edc8a7f8826ba38184b991a06f06c736358b74
SHA512 ae13f63cda3eb141b41749092b390451e4e353197e711172a07701f77d0c58596d69c5d222bb125f806e37ad4f8e588e35f12f6655c916ddd274b4b3af418242
SSDEEP 24576:DWPT5MjX0kvAwQwWdsWC1/Owi6Tn503L9CajagUG:DoTOjJvAXxC12wVT50bcrv
MD5 SHA1 SHA512 SSDEEP

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csrss.exe

Path C:\Program Files\Windows Sidebar\Shared Gadgets\csrss.exe
Size 1.4MB
SHA256 bb00399cf42ca87f984e2cfce9ffeeb514c66f24036a305989ecddca7857cf62
MD5 1bfc612d584aa106f9784450c67dd4b7
SHA1 75edc8a7f8826ba38184b991a06f06c736358b74
SHA512 ae13f63cda3eb141b41749092b390451e4e353197e711172a07701f77d0c58596d69c5d222bb125f806e37ad4f8e588e35f12f6655c916ddd274b4b3af418242
SSDEEP 24576:DWPT5MjX0kvAwQwWdsWC1/Owi6Tn503L9CajagUG:DoTOjJvAXxC12wVT50bcrv
MD5 SHA1 SHA512 SSDEEP

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csrss.exe

Path C:\Program Files\Windows Sidebar\Shared Gadgets\csrss.exe
Size 1.4MB
SHA256 bb00399cf42ca87f984e2cfce9ffeeb514c66f24036a305989ecddca7857cf62
MD5 1bfc612d584aa106f9784450c67dd4b7
SHA1 75edc8a7f8826ba38184b991a06f06c736358b74
SHA512 ae13f63cda3eb141b41749092b390451e4e353197e711172a07701f77d0c58596d69c5d222bb125f806e37ad4f8e588e35f12f6655c916ddd274b4b3af418242
SSDEEP 24576:DWPT5MjX0kvAwQwWdsWC1/Owi6Tn503L9CajagUG:DoTOjJvAXxC12wVT50bcrv
MD5 SHA1 SHA512 SSDEEP

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Cab589E.tmp

Path C:\Users\Admin\AppData\Local\Temp\Cab589E.tmp
Size 61KB
SHA256 10f3deb6c452d749a7451b5d065f4c0449737e5ee8a44f4d15844b503141e65b
MD5 fc4666cbca561e864e7fdf883a9e6661
SHA1 2f8d6094c7a34bf12ea0bbf0d51ee9c5bb7939a5
SHA512 c71f54b571e01f247f072be4bbebdf5d8410b67eb79a61e7e0d9853fe857ab9bd12f53e6af3394b935560178107291fc4be351b27deb388eba90ba949633d57d
SSDEEP 1536:pvl2gmukMiArbge/oKIxf+Q9yNJLaRCfIElhUuDz:pvl2gmZhpehIxfJsJLawfIElhUu3
MD5 SHA1 SHA512 SSDEEP

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Tar9360.tmp

Path C:\Users\Admin\AppData\Local\Temp\Tar9360.tmp
Size 161KB
SHA256 c0cf8cc04c34b5b80a2d86ad0eafb2dd71436f070c86b0321fba0201879625fd
MD5 73b4b714b42fc9a6aaefd0ae59adb009
SHA1 efdaffd5b0ad21913d22001d91bf6c19ecb4ac41
SHA512 73af3c51b15f89237552b1718bef21fd80788fa416bab2cb2e7fb3a60d56249a716eda0d2dd68ab643752272640e7eaaaf57ce64bcb38373ddc3d035fb8d57cd
SSDEEP 1536:glJXlCUsGRvk/99SFrdW5ib1NWdm1wpzru2RfEyjYZjCQavSmt6t9:glJXqGRI0Sdm0zru2RUjCjvyz
MD5 SHA1 SHA512 SSDEEP

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memory/1320-62-0x0000000000630000-0x000000000063C000-memory.dmp

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memory/1320-60-0x0000000000610000-0x000000000061C000-memory.dmp

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memory/1320-61-0x0000000000620000-0x000000000062A000-memory.dmp

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memory/1320-54-0x0000000000210000-0x0000000000378000-memory.dmp

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memory/1320-59-0x0000000000600000-0x000000000060C000-memory.dmp

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memory/1320-57-0x00000000003E0000-0x00000000003F6000-memory.dmp

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memory/1320-58-0x0000000000400000-0x0000000000410000-memory.dmp

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memory/1320-56-0x00000000003C0000-0x00000000003DC000-memory.dmp

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memory/1320-55-0x0000000000650000-0x00000000006D0000-memory.dmp

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memory/1544-83-0x00000000009A0000-0x0000000000B08000-memory.dmp

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memory/1544-84-0x000000001AC50000-0x000000001ACD0000-memory.dmp

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memory/1544-103-0x000000001AC50000-0x000000001ACD0000-memory.dmp

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