Analysis
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max time kernel
91s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20220901-en -
resource tags
arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system -
submitted
20/01/2023, 04:33
Static task
static1
Behavioral task
behavioral1
Sample
ss.ps1
Resource
win7-20221111-en
General
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Target
ss.ps1
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Size
5.1MB
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MD5
970aca768e68faa580f758a1a379686b
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SHA1
6a93921485cbd83382eb5a47315b1f0a67bcf684
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SHA256
6c1e62385d660ca43e024d461154fbb4805e429cdf7850d19510d7f69533739e
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SHA512
66dd4c5b17978e68c8e0cd2bc4fd35ba5d519447ff34259ec77d11e4253cbfc9955a43915ed3c343f41dc04d97f4302ab6922a823b0e0da44e8893d29ec7cf0f
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SSDEEP
49152:CY1wOeTfeinwRg0Yd0YtWdR2++BqkPiblNmBZOqsHtL3rdyW6JKHINYMpnkq/3+s:E
Malware Config
Extracted
quasar
1.4.0
Office04
ghcc.duckdns.org:4782
a9c03eb7-f3c1-4b9e-a4f7-1962d17a793b
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encryption_key
B0326395AC2D48856CAE22978A087DF5DCF5816D
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install_name
Client.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
Update
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subdirectory
SubDir
Signatures
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Quasar payload 2 IoCs
resource yara_rule behavioral2/memory/3532-135-0x000000000047E74E-mapping.dmp family_quasar behavioral2/memory/3532-137-0x0000000000520000-0x00000000005A4000-memory.dmp family_quasar -
Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
flow ioc 19 api.ipify.org 20 api.ipify.org -
Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 4032 set thread context of 3532 4032 powershell.exe 83 -
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 220 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 4032 powershell.exe 4032 powershell.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 4032 powershell.exe Token: SeDebugPrivilege 3532 RegAsm.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 3532 RegAsm.exe -
Suspicious use of WriteProcessMemory 11 IoCs
description pid Process procid_target PID 4032 wrote to memory of 3532 4032 powershell.exe 83 PID 4032 wrote to memory of 3532 4032 powershell.exe 83 PID 4032 wrote to memory of 3532 4032 powershell.exe 83 PID 4032 wrote to memory of 3532 4032 powershell.exe 83 PID 4032 wrote to memory of 3532 4032 powershell.exe 83 PID 4032 wrote to memory of 3532 4032 powershell.exe 83 PID 4032 wrote to memory of 3532 4032 powershell.exe 83 PID 4032 wrote to memory of 3532 4032 powershell.exe 83 PID 3532 wrote to memory of 220 3532 RegAsm.exe 84 PID 3532 wrote to memory of 220 3532 RegAsm.exe 84 PID 3532 wrote to memory of 220 3532 RegAsm.exe 84
Processes
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\ss.ps11⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4032 -
C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"2⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3532 -
C:\Windows\SysWOW64\schtasks.exe"schtasks" /create /tn "Update" /sc ONLOGON /tr "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
PID:220
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