Malware Analysis Report

2025-01-22 14:43

Sample ID 240604-1vwxwsdf68
Target csrss.exe
SHA256 d2c04698e0f237d4d66fc4e6be0c4b8f6c8fd156f237352e0d30f4b72474b714
Tags
gh0strat rat upx
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

d2c04698e0f237d4d66fc4e6be0c4b8f6c8fd156f237352e0d30f4b72474b714

Threat Level: Known bad

The file csrss.exe was found to be: Known bad.

Malicious Activity Summary

gh0strat rat upx

Gh0strat

Gh0st RAT payload

UPX packed file

Executes dropped EXE

Checks computer location settings

Deletes itself

Enumerates connected drives

Drops file in Program Files directory

Enumerates physical storage devices

Unsigned PE

Program crash

Suspicious use of WriteProcessMemory

Checks processor information in registry

Modifies data under HKEY_USERS

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of SendNotifyMessage

Modifies registry class

Suspicious use of FindShellTrayWindow

Checks SCSI registry key(s)

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-04 21:59

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-04 21:58

Reported

2024-06-04 22:05

Platform

win10v2004-20240426-en

Max time kernel

193s

Max time network

189s

Command Line

"C:\Users\Admin\AppData\Local\Temp\csrss.exe"

Signatures

Gh0st RAT payload

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Gh0strat

rat gh0strat

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\csrss.exe N/A

Deletes itself

Description Indicator Process Target
N/A N/A C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A

UPX packed file

upx
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\E: C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A
File opened (read-only) \??\G: C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A
File opened (read-only) \??\M: C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A
File opened (read-only) \??\Q: C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A
File opened (read-only) \??\U: C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A
File opened (read-only) \??\B: C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A
File opened (read-only) \??\I: C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A
File opened (read-only) \??\J: C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A
File opened (read-only) \??\S: C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A
File opened (read-only) \??\W: C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A
File opened (read-only) \??\Y: C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A
File opened (read-only) \??\H: C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A
File opened (read-only) \??\L: C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A
File opened (read-only) \??\P: C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A
File opened (read-only) \??\Z: C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A
File opened (read-only) \??\K: C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A
File opened (read-only) \??\N: C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A
File opened (read-only) \??\O: C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A
File opened (read-only) \??\R: C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A
File opened (read-only) \??\T: C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A
File opened (read-only) \??\V: C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A
File opened (read-only) \??\X: C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File created C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe C:\Users\Admin\AppData\Local\Temp\csrss.exe N/A
File opened for modification C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe C:\Users\Admin\AppData\Local\Temp\csrss.exe N/A

Enumerates physical storage devices

Checks SCSI registry key(s)

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\Properties\{b725f130-47ef-101a-a5f1-02608c9eebac}\000A C:\Windows\system32\taskmgr.exe N/A
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\FriendlyName C:\Windows\system32\taskmgr.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000 C:\Windows\system32\taskmgr.exe N/A

Checks processor information in registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\1\ProcessorNameString C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A
Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\2 C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A
Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A
Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\1 C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A

Modifies data under HKEY_USERS

Description Indicator Process Target
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\ActiveMovie C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\ActiveMovie\devenum\Version = "7" C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\ActiveMovie\devenum C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000_Classes\Local Settings C:\Windows\system32\taskmgr.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\csrss.exe N/A
Token: SeDebugPrivilege N/A C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A
Token: SeDebugPrivilege N/A C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A
Token: SeDebugPrivilege N/A C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A
Token: SeDebugPrivilege N/A C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A
Token: SeDebugPrivilege N/A C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A
Token: SeDebugPrivilege N/A C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A
Token: SeDebugPrivilege N/A C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\system32\taskmgr.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Windows\system32\taskmgr.exe N/A
Token: SeCreateGlobalPrivilege N/A C:\Windows\system32\taskmgr.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\csrss.exe

"C:\Users\Admin\AppData\Local\Temp\csrss.exe"

C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe

"C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 4100 -ip 4100

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4100 -s 1064

C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe

"C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 1744 -ip 1744

C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe

"C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe"

C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe

"C:\Program Files (x86)\Microsoft Jufbhx\Jufrxnb.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 548 -p 4236 -ip 4236

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1744 -s 184

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4236 -s 568

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 508 -p 3744 -ip 3744

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3744 -s 552

C:\Windows\System32\rundll32.exe

C:\Windows\System32\rundll32.exe shell32.dll,SHCreateLocalServerRunDll {c82192ee-6cb5-4bc0-9ef0-fb818773790a} -Embedding

C:\Windows\System32\rundll32.exe

C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding

C:\Windows\system32\taskmgr.exe

"C:\Windows\system32\taskmgr.exe" /7

Network

Country Destination Domain Proto
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 249.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 www.exiles.site udp
HK 154.201.74.240:9090 www.exiles.site tcp
US 8.8.8.8:53 240.74.201.154.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 183.142.211.20.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 240.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 94.65.42.20.in-addr.arpa udp

Files

memory/4100-1-0x0000000000C00000-0x0000000000E00000-memory.dmp

memory/4100-3-0x0000000000400000-0x0000000000461000-memory.dmp

memory/4100-2-0x0000000002A00000-0x0000000002A61000-memory.dmp

memory/4100-4-0x0000000010000000-0x0000000010362000-memory.dmp

memory/4100-8-0x0000000010000000-0x0000000010362000-memory.dmp

memory/4100-9-0x0000000000400000-0x0000000000863000-memory.dmp

memory/4100-7-0x0000000010000000-0x0000000010362000-memory.dmp

memory/1744-25-0x0000000000400000-0x0000000000863000-memory.dmp

memory/4236-31-0x0000000000400000-0x0000000000863000-memory.dmp

memory/4236-30-0x0000000010000000-0x0000000010362000-memory.dmp

memory/4236-34-0x0000000010000000-0x0000000010362000-memory.dmp

memory/4236-35-0x0000000010000000-0x0000000010362000-memory.dmp

memory/4100-37-0x0000000000400000-0x0000000000461000-memory.dmp

memory/4100-36-0x0000000000400000-0x0000000000863000-memory.dmp

memory/1744-53-0x0000000000400000-0x0000000000863000-memory.dmp

memory/1464-55-0x0000000010000000-0x0000000010362000-memory.dmp

memory/1464-56-0x0000000010000000-0x0000000010362000-memory.dmp

memory/3744-57-0x0000000000400000-0x0000000000863000-memory.dmp

memory/1464-58-0x00000000751C0000-0x00000000751F9000-memory.dmp

memory/1464-59-0x0000000010000000-0x0000000010362000-memory.dmp

memory/1464-60-0x0000000000400000-0x0000000000863000-memory.dmp

memory/3732-76-0x0000023AC7310000-0x0000023AC7311000-memory.dmp

memory/3732-77-0x0000023AC7310000-0x0000023AC7311000-memory.dmp

memory/3732-78-0x0000023AC7310000-0x0000023AC7311000-memory.dmp

memory/3732-88-0x0000023AC7310000-0x0000023AC7311000-memory.dmp

memory/3732-87-0x0000023AC7310000-0x0000023AC7311000-memory.dmp

memory/3732-86-0x0000023AC7310000-0x0000023AC7311000-memory.dmp

memory/3732-85-0x0000023AC7310000-0x0000023AC7311000-memory.dmp

memory/3732-84-0x0000023AC7310000-0x0000023AC7311000-memory.dmp

memory/3732-83-0x0000023AC7310000-0x0000023AC7311000-memory.dmp

memory/3732-82-0x0000023AC7310000-0x0000023AC7311000-memory.dmp