Analysis
- max time kernel
90s - max time network
135s - platform
windows11-21h2_x64 - resource
win11-20240221-en - resource tags
- submitted
29/03/2024, 21:10
General
- Target 6ce9c0ea355a3baed90c8ac4807f89069789ff03e105838002dd3ee7ce1b5830.exe
- Size 633KB
- Sample240329-zz7draae62
- SHA256 6ce9c0ea355a3baed90c8ac4807f89069789ff03e105838002dd3ee7ce1b5830
Malware Config
Extracted
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quasar
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1.4.1
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50 installs
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217.63.234.90:4444
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217.63.234.90:1313
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127.0.0.1:1313
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ef23a66e-d8e1-48c7-a533-50e2b78bea4a
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encryption_key
6B0D9CDFBF22251A89F554E059B7463C8CDE0F0C
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install_name
svchost.exe
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log_directory
Logs50spread
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reconnect_delay
3000
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startup_key
svchost.exe
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subdirectory
SubDir
Signatures
- Detect ZGRat V1 1 IoCs
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 2 IoCs
- ZGRat
ZGRat is remote access trojan written in C#.
- Downloads MZ/PE file
- Executes dropped EXE 3 IoCs
- Suspicious use of SetThreadContext 1 IoCs
- Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 5 IoCs
- Suspicious use of AdjustPrivilegeToken 5 IoCs
- Suspicious use of WriteProcessMemory 14 IoCs
- Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
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C:\Users\Admin\AppData\Local\Temp\6ce9c0ea355a3baed90c8ac4807f89069789ff03e105838002dd3ee7ce1b5830.exe"C:\Users\Admin\AppData\Local\Temp\6ce9c0ea355a3baed90c8ac4807f89069789ff03e105838002dd3ee7ce1b5830.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
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C:\Users\Admin\AppData\Roaming\XsdType\BaseDirectory.exeC:\Users\Admin\AppData\Roaming\XsdType\BaseDirectory.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\Microsoft.NET\Framework64\v4.0.30319\RegAsm.exeC:\Windows\Microsoft.NET\Framework64\v4.0.30319\RegAsm.exe2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\kbldrkl.exe"C:\Users\Admin\AppData\Local\Temp\kbldrkl.exe"3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "svchost.exe" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe" /rl HIGHEST /f4⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe"C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe"4⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "svchost.exe" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe" /rl HIGHEST /f5⤵
- Creates scheduled task(s)
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
kbldrkl.exe
BaseDirectory.exe
memory/1860-20-0x00007FFEDCEF0000-0x00007FFEDD9B2000-memory.dmp
memory/1860-18-0x0000022A78610000-0x0000022A78620000-memory.dmp
memory/1860-17-0x0000022A78610000-0x0000022A78620000-memory.dmp
memory/1860-13-0x00007FFEDCEF0000-0x00007FFEDD9B2000-memory.dmp
memory/1860-14-0x0000022A78610000-0x0000022A78620000-memory.dmp
memory/2388-44-0x00007FFEDCEF0000-0x00007FFEDD9B2000-memory.dmp
memory/2388-21-0x0000022E2EEC0000-0x0000022E2EED0000-memory.dmp
memory/2388-22-0x0000022E2EEC0000-0x0000022E2EED0000-memory.dmp
memory/2388-19-0x00007FFEDCEF0000-0x00007FFEDD9B2000-memory.dmp
memory/2388-45-0x0000022E2EEC0000-0x0000022E2EED0000-memory.dmp
memory/2388-46-0x0000022E2EEC0000-0x0000022E2EED0000-memory.dmp
memory/3104-36-0x00007FFEDCEF0000-0x00007FFEDD9B2000-memory.dmp
memory/3104-38-0x000000001D000000-0x000000001D050000-memory.dmp
memory/3104-47-0x00007FFEDCEF0000-0x00007FFEDD9B2000-memory.dmp
memory/3104-43-0x000000001D0B0000-0x000000001D0EC000-memory.dmp
memory/3104-42-0x000000001D050000-0x000000001D062000-memory.dmp
memory/3104-39-0x000000001D110000-0x000000001D1C2000-memory.dmp
memory/3140-26-0x0000000000130000-0x0000000000454000-memory.dmp
memory/3140-29-0x000000001B320000-0x000000001B330000-memory.dmp
memory/3140-37-0x00007FFEDCEF0000-0x00007FFEDD9B2000-memory.dmp
memory/3140-28-0x00007FFEDCEF0000-0x00007FFEDD9B2000-memory.dmp
memory/3440-0-0x000002790CF60000-0x000002790D002000-memory.dmp
memory/3440-10-0x00007FFEDCEF0000-0x00007FFEDD9B2000-memory.dmp
memory/3440-4-0x0000027927600000-0x0000027927656000-memory.dmp
memory/3440-5-0x000002790EC10000-0x000002790EC5C000-memory.dmp
memory/3440-3-0x00000279274F0000-0x0000027927500000-memory.dmp
memory/3440-2-0x00007FFEDCEF0000-0x00007FFEDD9B2000-memory.dmp
memory/3440-1-0x0000027927500000-0x0000027927604000-memory.dmp
memory/3440-6-0x0000027927760000-0x00000279277B4000-memory.dmp