Analysis
- max time kernel
141s - max time network
177s - platform
windows10-2004_x64 - resource
win10v2004-20230915-en - resource tags
- submitted
18/10/2023, 07:20
General
- Target 1121.exe
- Size 25.0MB
- Sample231018-h528jsdf29
- SHA256 42adfe25ed80bc9be884e2457c32af2779db6ebb4dac42dc25e10df126e84b7f
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
27.124.4.200:7777
-
ca81bdec-cd21-453c-80fc-28d569d9e9f1
-
encryption_key
24B6ADE5FE27A1D15C1BF33BBEC6447647F69663
-
install_name
Client.exe
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
Quasar Client Startup
-
subdirectory
SubDir
Signatures
- 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
- 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).
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 2 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\1121.exe"C:\Users\Admin\AppData\Local\Temp\1121.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\1121.exe"C:\Users\Admin\AppData\Local\1121.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
1121.exe
1121.exe
1121.exe
1121.exe.log
memory/2476-0-0x00007FFE465D0000-0x00007FFE47091000-memory.dmp
memory/2476-1-0x00000251B28D0000-0x00000251B41CC000-memory.dmp
memory/2476-2-0x00007FFE465D0000-0x00007FFE47091000-memory.dmp
memory/2476-16-0x00007FFE465D0000-0x00007FFE47091000-memory.dmp
memory/3908-19-0x000001E7A43E0000-0x000001E7A43E6000-memory.dmp
memory/3908-18-0x00007FFE465D0000-0x00007FFE47091000-memory.dmp
memory/3908-17-0x00007FFE465D0000-0x00007FFE47091000-memory.dmp
memory/3908-20-0x000001E7BDE30000-0x000001E7BE154000-memory.dmp
memory/3908-21-0x000001E7BE620000-0x000001E7BE630000-memory.dmp
memory/3908-22-0x000001E7BE150000-0x000001E7BE1A0000-memory.dmp
memory/3908-23-0x000001E7C7160000-0x000001E7C7212000-memory.dmp
memory/3908-24-0x00007FFE641D0000-0x00007FFE643C5000-memory.dmp
memory/3908-25-0x000001E7A5DC0000-0x000001E7A5DD2000-memory.dmp
memory/3908-26-0x000001E7BE5E0000-0x000001E7BE61C000-memory.dmp
memory/3908-27-0x000001E7BE620000-0x000001E7BE630000-memory.dmp
memory/3908-28-0x00007FFE641D0000-0x00007FFE643C5000-memory.dmp