Analysis
- max time kernel
142s - max time network
155s - platform
windows10-2004_x64 - resource
win10v2004-20230831-en - resource tags
- submitted
06/09/2023, 16:34
General
- Target JC_39d8d782ab9d2c91b4816543515a5f3a366682a09f3edabe6e657e327d405699.exe
- Size 405KB
- Sample230906-t3lcsshf8t
- SHA256 39d8d782ab9d2c91b4816543515a5f3a366682a09f3edabe6e657e327d405699
Malware Config
Extracted
-
quasar
-
1.3.3.7
-
Office04
-
max-cleaner.at.ply.gg:19784
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QSR_MUTEX_v3A9ZNWgakvECMqg0w
-
encryption_key
SjKClDrAF62qu45aCr3i
-
install_name
JJ Mod.exe
-
log_directory
Logs
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reconnect_delay
3000
-
startup_key
Quasar Client Startup
-
subdirectory
SubDir
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 3 IoCs
- Executes dropped EXE 1 IoCs
- Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 9 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\JC_39d8d782ab9d2c91b4816543515a5f3a366682a09f3edabe6e657e327d405699.exe"C:\Users\Admin\AppData\Local\Temp\JC_39d8d782ab9d2c91b4816543515a5f3a366682a09f3edabe6e657e327d405699.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exe"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\JC_39d8d782ab9d2c91b4816543515a5f3a366682a09f3edabe6e657e327d405699.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
-
-
C:\Users\Admin\AppData\Roaming\SubDir\JJ Mod.exe"C:\Users\Admin\AppData\Roaming\SubDir\JJ Mod.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exe"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\JJ Mod.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
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-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
JJ Mod.exe
JJ Mod.exe
memory/3260-20-0x00000000067D0000-0x00000000067DA000-memory.dmp
memory/3260-19-0x0000000005040000-0x0000000005050000-memory.dmp
memory/3260-18-0x0000000075360000-0x0000000075B10000-memory.dmp
memory/3260-16-0x0000000005040000-0x0000000005050000-memory.dmp
memory/3260-15-0x0000000075360000-0x0000000075B10000-memory.dmp
memory/4700-4-0x0000000005790000-0x00000000057A0000-memory.dmp
memory/4700-9-0x0000000075360000-0x0000000075B10000-memory.dmp
memory/4700-7-0x0000000006C20000-0x0000000006C5C000-memory.dmp
memory/4700-6-0x00000000067E0000-0x00000000067F2000-memory.dmp
memory/4700-5-0x0000000005AA0000-0x0000000005B06000-memory.dmp
memory/4700-0-0x0000000075360000-0x0000000075B10000-memory.dmp
memory/4700-17-0x0000000075360000-0x0000000075B10000-memory.dmp
memory/4700-3-0x00000000056E0000-0x0000000005772000-memory.dmp
memory/4700-2-0x0000000005BB0000-0x0000000006154000-memory.dmp
memory/4700-1-0x0000000000C60000-0x0000000000CCC000-memory.dmp