Analysis
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max time kernel
129s -
max time network
141s -
platform
windows7_x64 -
resource
win7-20231020-en -
resource tags
arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system -
submitted
03-12-2023 10:41
Static task
static1
Behavioral task
behavioral1
Sample
425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe
Resource
win7-20231020-en
General
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Target
425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe
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Size
3.2MB
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MD5
58abd80cc431895f2c2126f714ca3c8c
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SHA1
9338c3bbe9e6dd3658848c03a5d3bcf02dfbe965
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SHA256
425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff
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SHA512
fcd8197173da2c475451f500cbea32b446d872a8553ebd76dae4ac3873ed8da149e8036cad65968f10d6719992e442e0ddfb458ce250c41521668d5117a14ec4
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SSDEEP
49152:S9GUKQbhUbLP/WdzmmVoNyQNKXVTHUt0ONKgDGsbolFjeTXbjuOvtXcUwowyr4T5:yUbLPudCfUj0t0ON/GUW6lJ3HdjX0
Malware Config
Extracted
quasar
1.4.1
Office04
y20.ddns.net:5552
081f9344-bbf0-4c0d-832c-1597fc2c5291
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encryption_key
51E85A39CEAF3ACB23D073483E360B1A632697B4
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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
Quasar Client Startup
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subdirectory
SubDir
Signatures
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Quasar payload 5 IoCs
resource yara_rule behavioral1/memory/828-10-0x0000000000400000-0x0000000000724000-memory.dmp family_quasar behavioral1/memory/828-11-0x0000000000400000-0x0000000000724000-memory.dmp family_quasar behavioral1/memory/828-14-0x0000000000400000-0x0000000000724000-memory.dmp family_quasar behavioral1/memory/828-17-0x0000000000400000-0x0000000000724000-memory.dmp family_quasar behavioral1/memory/828-19-0x0000000000400000-0x0000000000724000-memory.dmp family_quasar -
Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 2356 set thread context of 828 2356 425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe 30 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 1 IoCs
pid Process 2176 powershell.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 2176 powershell.exe Token: SeDebugPrivilege 828 RegAsm.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
pid Process 828 RegAsm.exe -
Suspicious use of SendNotifyMessage 1 IoCs
pid Process 828 RegAsm.exe -
Suspicious use of WriteProcessMemory 16 IoCs
description pid Process procid_target PID 2356 wrote to memory of 2176 2356 425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe 28 PID 2356 wrote to memory of 2176 2356 425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe 28 PID 2356 wrote to memory of 2176 2356 425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe 28 PID 2356 wrote to memory of 2176 2356 425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe 28 PID 2356 wrote to memory of 828 2356 425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe 30 PID 2356 wrote to memory of 828 2356 425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe 30 PID 2356 wrote to memory of 828 2356 425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe 30 PID 2356 wrote to memory of 828 2356 425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe 30 PID 2356 wrote to memory of 828 2356 425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe 30 PID 2356 wrote to memory of 828 2356 425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe 30 PID 2356 wrote to memory of 828 2356 425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe 30 PID 2356 wrote to memory of 828 2356 425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe 30 PID 2356 wrote to memory of 828 2356 425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe 30 PID 2356 wrote to memory of 828 2356 425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe 30 PID 2356 wrote to memory of 828 2356 425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe 30 PID 2356 wrote to memory of 828 2356 425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe 30
Processes
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C:\Users\Admin\AppData\Local\Temp\425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe"C:\Users\Admin\AppData\Local\Temp\425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2356 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"powershell.exe" Remove -ItemProperty -Path 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run' -Name '';New-ItemProperty -Path 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run' -Name '' -Value '"C:\Users\Admin\AppData\Roaming\.exe"' -PropertyType 'String'2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2176
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe#cmd2⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:828
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