Analysis
- max time kernel
0s - max time network
113s - platform
windows10-2004_x64 - resource
win10v2004-20231222-en - resource tags
- submitted
13/01/2024, 04:42
General
- Target Nlbrute x32.exe
- Size 8.3MB
- Sample240113-fb13aaccbq
- SHA256 ec9ac12934cb6fddd85e526a88f43557d65f4ce109903c98ba7e00b9aad25d76
Malware Config
Extracted
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quasar
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1.3.0.0
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Office04
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trantienratvip.ddns.net:4782
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QSR_MUTEX_XG5QWPg5EAuaozWcYa
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encryption_key
JrQ3qCfRyagmbeFXSbbj
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install_name
NLbrute.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
Quasar Client Startup
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subdirectory
SubDir
Signatures
- Detect Neshta payload 9 IoCs
- Neshta
Malware from the neshta family is designed to infect itself into other files to spread itself and cause damage.
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 1 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 IoCs
- Modifies system executable filetype association 2 TTPs 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.
- Drops file in Windows directory 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Modifies registry class 1 IoCs
- Suspicious use of WriteProcessMemory 2 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\Nlbrute x32.exe"C:\Users\Admin\AppData\Local\Temp\Nlbrute x32.exe"1⤵
- Checks computer location settings
- Modifies system executable filetype association
- Drops file in Windows directory
- Modifies registry class
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\3582-490\Nlbrute x32.exe"C:\Users\Admin\AppData\Local\Temp\3582-490\Nlbrute x32.exe"2⤵
- Executes dropped EXE
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C:\Windows\svchost.com"C:\Windows\svchost.com" "C:\Users\Admin\AppData\Roaming\1.exe"3⤵
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C:\Windows\svchost.com"C:\Windows\svchost.com" "C:\Users\Admin\AppData\Roaming\NLBRUT~1.EXE"3⤵
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C:\Users\Admin\AppData\Roaming\NLBRUT~1.EXEC:\Users\Admin\AppData\Roaming\NLBRUT~1.EXE1⤵
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C:\Users\Admin\AppData\Roaming\1.exeC:\Users\Admin\AppData\Roaming\1.exe1⤵
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C:\Windows\SysWOW64\schtasks.exe"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\1.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Roaming\SubDir\NLbrute.exe"C:\Users\Admin\AppData\Roaming\SubDir\NLbrute.exe"2⤵
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C:\Windows\SysWOW64\schtasks.exe"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\NLbrute.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
Nlbrute x32.exe
Nlbrute x32.exe
Nlbrute x32.exe
NLBRUT~1.EXE
NLBrute1.2 x32.exe
svchost.com
memory/636-200-0x0000000000400000-0x000000000041B000-memory.dmp
memory/832-234-0x0000000006170000-0x000000000617A000-memory.dmp
memory/832-230-0x0000000073800000-0x0000000073FB0000-memory.dmp
memory/832-232-0x0000000004C00000-0x0000000004C10000-memory.dmp
memory/832-246-0x0000000073800000-0x0000000073FB0000-memory.dmp
memory/832-248-0x0000000004C00000-0x0000000004C10000-memory.dmp
memory/1684-217-0x0000000005EB0000-0x0000000005EB1000-memory.dmp
memory/1684-207-0x0000000003930000-0x0000000003931000-memory.dmp
memory/1684-259-0x0000000000400000-0x0000000001C9F400-memory.dmp
memory/1684-118-0x00000000775D4000-0x00000000775D6000-memory.dmp
memory/1684-258-0x0000000000400000-0x0000000001C9F400-memory.dmp
memory/1684-196-0x0000000005F60000-0x0000000005F61000-memory.dmp
memory/1684-199-0x0000000005F70000-0x0000000005F71000-memory.dmp
memory/1684-257-0x0000000000400000-0x0000000001C9F400-memory.dmp
memory/1684-256-0x0000000000400000-0x0000000001C9F400-memory.dmp
memory/1684-202-0x0000000000400000-0x0000000001C9F400-memory.dmp
memory/1684-198-0x0000000005F20000-0x0000000005F21000-memory.dmp
memory/1684-197-0x0000000005F80000-0x0000000005F81000-memory.dmp
memory/1684-208-0x0000000005E60000-0x0000000005E61000-memory.dmp
memory/1684-213-0x0000000005E10000-0x0000000005E11000-memory.dmp
memory/1684-255-0x0000000000400000-0x0000000001C9F400-memory.dmp
memory/1684-221-0x0000000005E90000-0x0000000005E91000-memory.dmp
memory/1684-222-0x0000000005E50000-0x0000000005E51000-memory.dmp
memory/1684-220-0x0000000005EA0000-0x0000000005EA1000-memory.dmp
memory/1684-224-0x0000000005EE0000-0x0000000005EE1000-memory.dmp
memory/1684-227-0x0000000005E70000-0x0000000005E71000-memory.dmp
memory/1684-254-0x0000000000400000-0x0000000001C9F400-memory.dmp
memory/1684-253-0x0000000000400000-0x0000000001C9F400-memory.dmp
memory/1684-218-0x0000000005ED0000-0x0000000005ED1000-memory.dmp
memory/1684-252-0x0000000000400000-0x0000000001C9F400-memory.dmp
memory/1684-216-0x0000000005E30000-0x0000000005E31000-memory.dmp
memory/1684-215-0x0000000005E80000-0x0000000005E82000-memory.dmp
memory/1684-214-0x0000000005EF0000-0x0000000005EF1000-memory.dmp
memory/1684-212-0x0000000005E40000-0x0000000005E41000-memory.dmp
memory/1684-211-0x0000000003920000-0x0000000003921000-memory.dmp
memory/1684-210-0x0000000003960000-0x0000000003961000-memory.dmp
memory/1684-209-0x0000000005F50000-0x0000000005F51000-memory.dmp
memory/1684-251-0x0000000000400000-0x0000000001C9F400-memory.dmp
memory/1684-206-0x0000000003940000-0x0000000003941000-memory.dmp
memory/1684-205-0x0000000003950000-0x0000000003951000-memory.dmp
memory/1684-204-0x0000000005F40000-0x0000000005F41000-memory.dmp
memory/1684-203-0x0000000005F30000-0x0000000005F31000-memory.dmp
memory/1684-231-0x0000000000400000-0x0000000001C9F400-memory.dmp
memory/1684-52-0x0000000000400000-0x0000000001C9F400-memory.dmp
memory/1684-250-0x0000000000400000-0x0000000001C9F400-memory.dmp
memory/1684-249-0x0000000000400000-0x0000000001C9F400-memory.dmp
memory/1684-247-0x0000000000400000-0x0000000001C9F400-memory.dmp
memory/1684-236-0x0000000000400000-0x0000000001C9F400-memory.dmp
memory/1684-238-0x0000000000400000-0x0000000001C9F400-memory.dmp
memory/1684-240-0x0000000000400000-0x0000000001C9F400-memory.dmp
memory/3976-245-0x0000000000400000-0x000000000041B000-memory.dmp
memory/3976-235-0x0000000000400000-0x000000000041B000-memory.dmp
memory/3976-239-0x0000000000400000-0x000000000041B000-memory.dmp
memory/4056-51-0x0000000000A40000-0x0000000000A9E000-memory.dmp
memory/4056-56-0x0000000005670000-0x0000000005680000-memory.dmp
memory/4056-121-0x0000000005400000-0x0000000005466000-memory.dmp
memory/4056-201-0x0000000005A00000-0x0000000005A12000-memory.dmp
memory/4056-53-0x0000000005A30000-0x0000000005FD4000-memory.dmp
memory/4056-54-0x0000000005360000-0x00000000053F2000-memory.dmp
memory/4056-229-0x0000000073800000-0x0000000073FB0000-memory.dmp
memory/4056-219-0x0000000006700000-0x000000000673C000-memory.dmp
memory/4056-55-0x0000000073800000-0x0000000073FB0000-memory.dmp
memory/4936-244-0x0000000000400000-0x000000000041B000-memory.dmp
memory/4936-237-0x0000000000400000-0x000000000041B000-memory.dmp
memory/4936-241-0x0000000000400000-0x000000000041B000-memory.dmp
memory/5016-13-0x0000000000210000-0x0000000000A4E000-memory.dmp
memory/5016-50-0x00007FF85FF70000-0x00007FF860A31000-memory.dmp
memory/5016-14-0x00007FF85FF70000-0x00007FF860A31000-memory.dmp