Analysis
- max time kernel
152s - max time network
156s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
11/10/2022, 10:11
General
- Target 3HkvftGZK9KZ.exe
- Size 1.3MB
- Sample221011-l798qahef9
- SHA256 4a412162a0b00623211b7303bc18b00b76d196ea8343a2c35abc262e9e97c9b2
Malware Config
Extracted
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quasar
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1.4.0
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Office04
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173.225.115.99:7702
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ecce8627-6b34-425d-8f0e-3a8923c66220
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encryption_key
F04A75E6507173FAEEC2BB82C564030A5E8413FF
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install_name
ser.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
Quasar Client Startup
-
subdirectory
quar
Extracted
-
limerat
-
aes_key
082808
-
antivm
true
-
c2_url
https://pastebin.com/raw/Mh8T0LJe
-
delay
6
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download_payload
false
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install
true
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install_name
limo.exe
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main_folder
Temp
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payload_url
https://mdl.arabou.edu.kw/ksa/user/profile/field/text/lang/en/VB64.exe
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pin_spread
true
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sub_folder
\Windows\
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usb_spread
true
Signatures
- LimeRAT
Simple yet powerful RAT for Windows machines written in .NET.
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 5 IoCs
- Downloads MZ/PE file
- Executes dropped EXE 10 IoCs
- Checks computer location settings 2 TTPs 6 IoCs
Looks up country code configured in the registry, likely geofence.
- Drops startup file 2 IoCs
- Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Adds Run key to start application 2 TTPs 1 IoCs
- Legitimate hosting services abused for malware hosting/C2 1 TTPs
- Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Checks processor information in registry 2 TTPs 4 IoCs
Processor information is often read in order to detect sandboxing environments.
- Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 3 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious use of AdjustPrivilegeToken 6 IoCs
- Suspicious use of FindShellTrayWindow 6 IoCs
- Suspicious use of SendNotifyMessage 4 IoCs
- Suspicious use of WriteProcessMemory 28 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\3HkvftGZK9KZ.exe"C:\Users\Admin\AppData\Local\Temp\3HkvftGZK9KZ.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\fend.exe"C:\Users\Admin\AppData\Local\Temp\fend.exe"2⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\gate.exe"C:\Users\Admin\AppData\Local\Temp\gate.exe"2⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\b52gate\b52gate.exe"C:\Users\Admin\AppData\Roaming\b52gate\b52gate.exe"3⤵
- Executes dropped EXE
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Checks processor information in registry
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\sysinf.exe"C:\Users\Admin\AppData\Local\Temp\sysinf.exe"4⤵
- Executes dropped EXE
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-
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C:\Users\Admin\AppData\Local\Temp\VB64.exe"C:\Users\Admin\AppData\Local\Temp\VB64.exe"2⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\qua.exe"C:\Users\Admin\AppData\Local\Temp\qua.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\quar\ser.exe"C:\Users\Admin\AppData\Roaming\quar\ser.exe"3⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\B72PweJ9Vbnr.exe"C:\Users\Admin\AppData\Local\Temp\B72PweJ9Vbnr.exe"4⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exeschtasks /create /f /sc ONLOGON /RL HIGHEST /tn LimeRAT-Admin /tr "'C:\Users\Admin\AppData\Local\Temp\Windows\limo.exe'"5⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\Windows\limo.exe"C:\Users\Admin\AppData\Local\Temp\Windows\limo.exe"5⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\tmp1596.tmpVB64.exe"C:\Users\Admin\AppData\Local\Temp\tmp1596.tmpVB64.exe"6⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
B72PweJ9Vbnr.exe
B72PweJ9Vbnr.exe
VB64.exe
VB64.exe
limo.exe
limo.exe
fend.exe
fend.exe
gate.exe
gate.exe
qua.exe
qua.exe
sysinf.exe
sysinf.exe
tmp1596.tmpVB64.exe
tmp1596.tmpVB64.exe
b52gate.exe
b52gate.exe
ser.exe
ser.exe
memory/1284-169-0x00007FFF3CBB0000-0x00007FFF3D671000-memory.dmp
memory/1284-160-0x00007FFF3CBB0000-0x00007FFF3D671000-memory.dmp
memory/1284-168-0x000000001C660000-0x000000001C712000-memory.dmp
memory/1284-167-0x000000001C550000-0x000000001C5A0000-memory.dmp
memory/1616-170-0x0000000075170000-0x0000000075721000-memory.dmp
memory/1616-166-0x0000000075170000-0x0000000075721000-memory.dmp
memory/1624-140-0x00007FFF3CBB0000-0x00007FFF3D671000-memory.dmp
memory/1624-137-0x0000016A122C0000-0x0000016A122CA000-memory.dmp
memory/1684-189-0x0000000007CC0000-0x0000000007D52000-memory.dmp
memory/2224-174-0x00000000000A0000-0x00000000000AC000-memory.dmp
memory/2224-177-0x00000000056C0000-0x0000000005C64000-memory.dmp
memory/2224-176-0x0000000004B10000-0x0000000004B76000-memory.dmp
memory/2224-175-0x0000000004A70000-0x0000000004B0C000-memory.dmp
memory/2340-154-0x00007FFF3CBB0000-0x00007FFF3D671000-memory.dmp
memory/2340-144-0x000001937F5C0000-0x000001937F5D2000-memory.dmp
memory/2340-151-0x00007FFF3CBB0000-0x00007FFF3D671000-memory.dmp
memory/2748-156-0x0000000075170000-0x0000000075721000-memory.dmp
memory/2748-165-0x0000000075170000-0x0000000075721000-memory.dmp
memory/2748-153-0x0000000075170000-0x0000000075721000-memory.dmp
memory/2888-185-0x00007FFF3CBB0000-0x00007FFF3D671000-memory.dmp
memory/3792-133-0x00007FFF3CBB0000-0x00007FFF3D671000-memory.dmp
memory/3792-150-0x00007FFF3CBB0000-0x00007FFF3D671000-memory.dmp
memory/3792-132-0x0000000000930000-0x0000000000A7A000-memory.dmp
memory/4848-155-0x00007FFF3CBB0000-0x00007FFF3D671000-memory.dmp
memory/4848-149-0x00000000006F0000-0x0000000000774000-memory.dmp
memory/4848-164-0x00007FFF3CBB0000-0x00007FFF3D671000-memory.dmp
memory/4848-152-0x00007FFF3CBB0000-0x00007FFF3D671000-memory.dmp