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Analysis
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max time kernel
145s -
max time network
157s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
25/11/2022, 08:51
Static task
static1
Behavioral task
behavioral1
Sample
8355ecc5bf7aaff778180863fee588adf6fdc1cb12062c021109a1ec1f130b34.exe
Resource
win7-20220812-en
General
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Target
8355ecc5bf7aaff778180863fee588adf6fdc1cb12062c021109a1ec1f130b34.exe
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Size
611KB
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MD5
cc65b79bc0887658e9c592071bf8cb91
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SHA1
a45592c19ed3c8579972c7c7e19ba01af2894348
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SHA256
8355ecc5bf7aaff778180863fee588adf6fdc1cb12062c021109a1ec1f130b34
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SHA512
0f0155a099487c91485b1df911fdbc4ae00fbbcd9ce48954daffadfe72247dc3d1f1af58d41081216a8977f43d277eb6578d8d4f04dceae32a361168c288b719
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SSDEEP
6144:4iBZTVvvVDzRW1BHH3g1NWT+AKYEM+gW4SmSMX0zCVsVwX+v456/Z9ZGoaEKwa/W:4AZTVXFRW1ZpK2bNV0Cgwu/ZGmkAh
Malware Config
Extracted
quasar
2.1.0.0
RAT
23.105.131.178:7812
VNM_MUTEX_It9SqdFDNndEItXfKp
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encryption_key
txgQXKaATimN7DY8jnPH
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install_name
Windows Defender Security.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
Windows Update
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subdirectory
Microsoft
Signatures
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Contains code to disable Windows Defender 6 IoCs
A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.
resource yara_rule behavioral2/files/0x0006000000022e48-134.dat disable_win_def behavioral2/files/0x0006000000022e48-135.dat disable_win_def behavioral2/memory/4772-137-0x0000000000D20000-0x0000000000DAC000-memory.dmp disable_win_def behavioral2/files/0x0007000000022e45-145.dat disable_win_def behavioral2/files/0x0007000000022e45-146.dat disable_win_def behavioral2/files/0x0006000000022e48-172.dat disable_win_def -
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection Windows Defender Security.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableBehaviorMonitoring = "1" Windows Defender Security.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableOnAccessProtection = "1" Windows Defender Security.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableScanOnRealtimeEnable = "1" Windows Defender Security.exe -
Quasar payload 6 IoCs
resource yara_rule behavioral2/files/0x0006000000022e48-134.dat family_quasar behavioral2/files/0x0006000000022e48-135.dat family_quasar behavioral2/memory/4772-137-0x0000000000D20000-0x0000000000DAC000-memory.dmp family_quasar behavioral2/files/0x0007000000022e45-145.dat family_quasar behavioral2/files/0x0007000000022e45-146.dat family_quasar behavioral2/files/0x0006000000022e48-172.dat family_quasar -
Executes dropped EXE 3 IoCs
pid Process 4772 Windows Defender Security.exe 4544 Windows Defender Security.exe 1124 Windows Defender Security.exe -
Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation 8355ecc5bf7aaff778180863fee588adf6fdc1cb12062c021109a1ec1f130b34.exe Key value queried \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation Windows Defender Security.exe -
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0" Windows Defender Security.exe Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features Windows Defender Security.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Update = "\"C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows Defender Security.exe\"" Windows Defender Security.exe -
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 17 ip-api.com 28 api.ipify.org -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 3332 schtasks.exe 4768 schtasks.exe -
Runs ping.exe 1 TTPs 1 IoCs
pid Process 1164 PING.EXE -
Suspicious behavior: EnumeratesProcesses 10 IoCs
pid Process 1068 powershell.exe 1068 powershell.exe 4772 Windows Defender Security.exe 4772 Windows Defender Security.exe 4772 Windows Defender Security.exe 4772 Windows Defender Security.exe 4772 Windows Defender Security.exe 4772 Windows Defender Security.exe 4772 Windows Defender Security.exe 1124 Windows Defender Security.exe -
Suspicious use of AdjustPrivilegeToken 5 IoCs
description pid Process Token: SeDebugPrivilege 4772 Windows Defender Security.exe Token: SeDebugPrivilege 1068 powershell.exe Token: SeDebugPrivilege 4544 Windows Defender Security.exe Token: SeDebugPrivilege 4544 Windows Defender Security.exe Token: SeDebugPrivilege 1124 Windows Defender Security.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 4544 Windows Defender Security.exe -
Suspicious use of WriteProcessMemory 33 IoCs
description pid Process procid_target PID 4636 wrote to memory of 4772 4636 8355ecc5bf7aaff778180863fee588adf6fdc1cb12062c021109a1ec1f130b34.exe 81 PID 4636 wrote to memory of 4772 4636 8355ecc5bf7aaff778180863fee588adf6fdc1cb12062c021109a1ec1f130b34.exe 81 PID 4636 wrote to memory of 4772 4636 8355ecc5bf7aaff778180863fee588adf6fdc1cb12062c021109a1ec1f130b34.exe 81 PID 4772 wrote to memory of 4768 4772 Windows Defender Security.exe 82 PID 4772 wrote to memory of 4768 4772 Windows Defender Security.exe 82 PID 4772 wrote to memory of 4768 4772 Windows Defender Security.exe 82 PID 4772 wrote to memory of 4544 4772 Windows Defender Security.exe 84 PID 4772 wrote to memory of 4544 4772 Windows Defender Security.exe 84 PID 4772 wrote to memory of 4544 4772 Windows Defender Security.exe 84 PID 4772 wrote to memory of 1068 4772 Windows Defender Security.exe 85 PID 4772 wrote to memory of 1068 4772 Windows Defender Security.exe 85 PID 4772 wrote to memory of 1068 4772 Windows Defender Security.exe 85 PID 4772 wrote to memory of 3068 4772 Windows Defender Security.exe 88 PID 4772 wrote to memory of 3068 4772 Windows Defender Security.exe 88 PID 4772 wrote to memory of 3068 4772 Windows Defender Security.exe 88 PID 3068 wrote to memory of 3652 3068 cmd.exe 90 PID 3068 wrote to memory of 3652 3068 cmd.exe 90 PID 3068 wrote to memory of 3652 3068 cmd.exe 90 PID 4544 wrote to memory of 3332 4544 Windows Defender Security.exe 91 PID 4544 wrote to memory of 3332 4544 Windows Defender Security.exe 91 PID 4544 wrote to memory of 3332 4544 Windows Defender Security.exe 91 PID 4772 wrote to memory of 4532 4772 Windows Defender Security.exe 93 PID 4772 wrote to memory of 4532 4772 Windows Defender Security.exe 93 PID 4772 wrote to memory of 4532 4772 Windows Defender Security.exe 93 PID 4532 wrote to memory of 2112 4532 cmd.exe 95 PID 4532 wrote to memory of 2112 4532 cmd.exe 95 PID 4532 wrote to memory of 2112 4532 cmd.exe 95 PID 4532 wrote to memory of 1164 4532 cmd.exe 96 PID 4532 wrote to memory of 1164 4532 cmd.exe 96 PID 4532 wrote to memory of 1164 4532 cmd.exe 96 PID 4532 wrote to memory of 1124 4532 cmd.exe 101 PID 4532 wrote to memory of 1124 4532 cmd.exe 101 PID 4532 wrote to memory of 1124 4532 cmd.exe 101
Processes
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C:\Users\Admin\AppData\Local\Temp\8355ecc5bf7aaff778180863fee588adf6fdc1cb12062c021109a1ec1f130b34.exe"C:\Users\Admin\AppData\Local\Temp\8355ecc5bf7aaff778180863fee588adf6fdc1cb12062c021109a1ec1f130b34.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4636 -
C:\Users\Admin\AppData\Roaming\Windows Defender Security.exe"C:\Users\Admin\AppData\Roaming\Windows Defender Security.exe"2⤵
- Modifies Windows Defender Real-time Protection settings
- Executes dropped EXE
- Checks computer location settings
- Windows security modification
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4772 -
C:\Windows\SysWOW64\schtasks.exe"schtasks" /create /tn "Windows Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows Defender Security.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
PID:4768
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C:\Users\Admin\AppData\Roaming\Microsoft\Windows Defender Security.exe"C:\Users\Admin\AppData\Roaming\Microsoft\Windows Defender Security.exe"3⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4544 -
C:\Windows\SysWOW64\schtasks.exe"schtasks" /create /tn "Windows Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Windows Defender Security.exe" /rl HIGHEST /f4⤵
- Creates scheduled task(s)
PID:3332
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"powershell" Get-MpPreference -verbose3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1068
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /k start /b del /q/f/s %TEMP%\* & exit3⤵
- Suspicious use of WriteProcessMemory
PID:3068 -
C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*4⤵PID:3652
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C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\63QINACbFgAU.bat" "3⤵
- Suspicious use of WriteProcessMemory
PID:4532 -
C:\Windows\SysWOW64\chcp.comchcp 650014⤵PID:2112
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C:\Windows\SysWOW64\PING.EXEping -n 10 localhost4⤵
- Runs ping.exe
PID:1164
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C:\Users\Admin\AppData\Roaming\Windows Defender Security.exe"C:\Users\Admin\AppData\Roaming\Windows Defender Security.exe"4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1124
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
1KB
MD510eab9c2684febb5327b6976f2047587
SHA1a12ed54146a7f5c4c580416aecb899549712449e
SHA256f49dbd55029bfbc15134f7c6a4f967d6c39142c63f2e8f1f8c78fab108a2c928
SHA5127e5fd90fffae723bd0c662a90e0730b507805f072771ee673d1d8c262dbf60c8a03ba5fe088f699a97c2e886380de158b2ccd59ee62e3d012dd6dd14ea9d0e50
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Filesize
219B
MD599d2674d26c25908b5cd64b0588f002f
SHA1b6ab6965a606862767ea9afd22c412000dd18995
SHA256948a2cf3f68af806a18a49bab1143fc84671fe10047444dfedf84b173720c43a
SHA5127d11ad1cdcbf8eb1044aeab7b5a058ac76127c55a7c06067b2d4a1ca56fd2389cc9cbeea5bb8bce6ad200482a4a1ca8a4bd56e99c5df8f45eeffd9958621ad81
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Filesize
535KB
MD50bd3018c9c566328497be54c7d882159
SHA18d90c23ee373ab935ba930f25c96374762c4a5a6
SHA256026971c3fba531247627dd9f3f7d51c566d8df28a52332bd3d0eb8ca55d96176
SHA51290cfde84ae14de5151c4950b8f8fe05d108a9716f3e0c104e2793a9c8bbb6a4385fe24a1bd9bc020cd061a128bb258ef44ef8679ac4b0e8a280107b22ed9e8cc
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Filesize
535KB
MD50bd3018c9c566328497be54c7d882159
SHA18d90c23ee373ab935ba930f25c96374762c4a5a6
SHA256026971c3fba531247627dd9f3f7d51c566d8df28a52332bd3d0eb8ca55d96176
SHA51290cfde84ae14de5151c4950b8f8fe05d108a9716f3e0c104e2793a9c8bbb6a4385fe24a1bd9bc020cd061a128bb258ef44ef8679ac4b0e8a280107b22ed9e8cc
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Filesize
535KB
MD50bd3018c9c566328497be54c7d882159
SHA18d90c23ee373ab935ba930f25c96374762c4a5a6
SHA256026971c3fba531247627dd9f3f7d51c566d8df28a52332bd3d0eb8ca55d96176
SHA51290cfde84ae14de5151c4950b8f8fe05d108a9716f3e0c104e2793a9c8bbb6a4385fe24a1bd9bc020cd061a128bb258ef44ef8679ac4b0e8a280107b22ed9e8cc
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Filesize
535KB
MD50bd3018c9c566328497be54c7d882159
SHA18d90c23ee373ab935ba930f25c96374762c4a5a6
SHA256026971c3fba531247627dd9f3f7d51c566d8df28a52332bd3d0eb8ca55d96176
SHA51290cfde84ae14de5151c4950b8f8fe05d108a9716f3e0c104e2793a9c8bbb6a4385fe24a1bd9bc020cd061a128bb258ef44ef8679ac4b0e8a280107b22ed9e8cc
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Filesize
535KB
MD50bd3018c9c566328497be54c7d882159
SHA18d90c23ee373ab935ba930f25c96374762c4a5a6
SHA256026971c3fba531247627dd9f3f7d51c566d8df28a52332bd3d0eb8ca55d96176
SHA51290cfde84ae14de5151c4950b8f8fe05d108a9716f3e0c104e2793a9c8bbb6a4385fe24a1bd9bc020cd061a128bb258ef44ef8679ac4b0e8a280107b22ed9e8cc