Analysis
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max time kernel
157s -
max time network
182s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
21-12-2023 22:13
Static task
static1
Behavioral task
behavioral1
Sample
0fdee64f4eb558b0d6e1a5a568095e40.exe
Resource
win7-20231215-en
General
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Target
0fdee64f4eb558b0d6e1a5a568095e40.exe
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Size
880KB
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MD5
0fdee64f4eb558b0d6e1a5a568095e40
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SHA1
55ca1696afa36ab5f36d3c2944a03bb988335d97
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SHA256
c7a070b7e06000af25f9fe5f44cfacfd4ac4a02371369267ad10cf3beaed8d4b
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SHA512
ddf3de5d0f69a29818f683c46ccd70891455f8781e46cf1ac37b740b67e74eea4408920ef3a54878707c81b74b2dc13337838a6521880a0c9f912cc7251bfe44
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SSDEEP
24576:zhOjdWkJhngpn9kNsMwbMgkK589joyhkIS:zgjdbDnKkK3MgkK56
Malware Config
Extracted
quasar
2.1.0.0
SEP05
23.105.131.187:7812
VNM_MUTEX_ea14HLQ5adxyrFdD2X
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encryption_key
jUWfdDb1toPE0KAlGJWH
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install_name
Windows Security.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
Windows Update Service
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subdirectory
Windows Security Update
Signatures
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Contains code to disable Windows Defender 1 IoCs
A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.
Processes:
resource yara_rule behavioral2/memory/4800-9-0x0000000000400000-0x000000000048C000-memory.dmp disable_win_def -
Processes:
0fdee64f4eb558b0d6e1a5a568095e40.exedescription ioc process Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableOnAccessProtection = "1" 0fdee64f4eb558b0d6e1a5a568095e40.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableScanOnRealtimeEnable = "1" 0fdee64f4eb558b0d6e1a5a568095e40.exe Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection 0fdee64f4eb558b0d6e1a5a568095e40.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableBehaviorMonitoring = "1" 0fdee64f4eb558b0d6e1a5a568095e40.exe -
Quasar payload 1 IoCs
Processes:
resource yara_rule behavioral2/memory/4800-9-0x0000000000400000-0x000000000048C000-memory.dmp family_quasar -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
0fdee64f4eb558b0d6e1a5a568095e40.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-2398549320-3657759451-817663969-1000\Control Panel\International\Geo\Nation 0fdee64f4eb558b0d6e1a5a568095e40.exe -
Executes dropped EXE 2 IoCs
Processes:
Windows Security.exeWindows Security.exepid process 1008 Windows Security.exe 1728 Windows Security.exe -
Processes:
0fdee64f4eb558b0d6e1a5a568095e40.exedescription ioc process Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0" 0fdee64f4eb558b0d6e1a5a568095e40.exe Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features 0fdee64f4eb558b0d6e1a5a568095e40.exe -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
0fdee64f4eb558b0d6e1a5a568095e40.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2398549320-3657759451-817663969-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\jEWDfCdAGM = "C:\\Users\\Admin\\AppData\\Roaming\\EcGASfXzFi\\SgBSNdRiPF.exe" 0fdee64f4eb558b0d6e1a5a568095e40.exe -
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
Processes:
flow ioc 30 ip-api.com -
Suspicious use of SetThreadContext 2 IoCs
Processes:
0fdee64f4eb558b0d6e1a5a568095e40.exeWindows Security.exedescription pid process target process PID 2636 set thread context of 4800 2636 0fdee64f4eb558b0d6e1a5a568095e40.exe 0fdee64f4eb558b0d6e1a5a568095e40.exe PID 1008 set thread context of 1728 1008 Windows Security.exe Windows Security.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Program crash 1 IoCs
Processes:
WerFault.exepid pid_target process target process 3684 4800 WerFault.exe 0fdee64f4eb558b0d6e1a5a568095e40.exe -
Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
Processes:
schtasks.exeschtasks.exepid process 3760 schtasks.exe 1604 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 9 IoCs
Processes:
powershell.exe0fdee64f4eb558b0d6e1a5a568095e40.exepid process 1412 powershell.exe 1412 powershell.exe 4800 0fdee64f4eb558b0d6e1a5a568095e40.exe 4800 0fdee64f4eb558b0d6e1a5a568095e40.exe 4800 0fdee64f4eb558b0d6e1a5a568095e40.exe 4800 0fdee64f4eb558b0d6e1a5a568095e40.exe 4800 0fdee64f4eb558b0d6e1a5a568095e40.exe 4800 0fdee64f4eb558b0d6e1a5a568095e40.exe 4800 0fdee64f4eb558b0d6e1a5a568095e40.exe -
Suspicious use of AdjustPrivilegeToken 4 IoCs
Processes:
0fdee64f4eb558b0d6e1a5a568095e40.exepowershell.exeWindows Security.exedescription pid process Token: SeDebugPrivilege 4800 0fdee64f4eb558b0d6e1a5a568095e40.exe Token: SeDebugPrivilege 1412 powershell.exe Token: SeDebugPrivilege 1728 Windows Security.exe Token: SeDebugPrivilege 1728 Windows Security.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
Windows Security.exepid process 1728 Windows Security.exe -
Suspicious use of WriteProcessMemory 34 IoCs
Processes:
0fdee64f4eb558b0d6e1a5a568095e40.exe0fdee64f4eb558b0d6e1a5a568095e40.exeWindows Security.exeWindows Security.execmd.exedescription pid process target process PID 2636 wrote to memory of 4800 2636 0fdee64f4eb558b0d6e1a5a568095e40.exe 0fdee64f4eb558b0d6e1a5a568095e40.exe PID 2636 wrote to memory of 4800 2636 0fdee64f4eb558b0d6e1a5a568095e40.exe 0fdee64f4eb558b0d6e1a5a568095e40.exe PID 2636 wrote to memory of 4800 2636 0fdee64f4eb558b0d6e1a5a568095e40.exe 0fdee64f4eb558b0d6e1a5a568095e40.exe PID 2636 wrote to memory of 4800 2636 0fdee64f4eb558b0d6e1a5a568095e40.exe 0fdee64f4eb558b0d6e1a5a568095e40.exe PID 2636 wrote to memory of 4800 2636 0fdee64f4eb558b0d6e1a5a568095e40.exe 0fdee64f4eb558b0d6e1a5a568095e40.exe PID 2636 wrote to memory of 4800 2636 0fdee64f4eb558b0d6e1a5a568095e40.exe 0fdee64f4eb558b0d6e1a5a568095e40.exe PID 2636 wrote to memory of 4800 2636 0fdee64f4eb558b0d6e1a5a568095e40.exe 0fdee64f4eb558b0d6e1a5a568095e40.exe PID 2636 wrote to memory of 4800 2636 0fdee64f4eb558b0d6e1a5a568095e40.exe 0fdee64f4eb558b0d6e1a5a568095e40.exe PID 4800 wrote to memory of 3760 4800 0fdee64f4eb558b0d6e1a5a568095e40.exe schtasks.exe PID 4800 wrote to memory of 3760 4800 0fdee64f4eb558b0d6e1a5a568095e40.exe schtasks.exe PID 4800 wrote to memory of 3760 4800 0fdee64f4eb558b0d6e1a5a568095e40.exe schtasks.exe PID 4800 wrote to memory of 1008 4800 0fdee64f4eb558b0d6e1a5a568095e40.exe Windows Security.exe PID 4800 wrote to memory of 1008 4800 0fdee64f4eb558b0d6e1a5a568095e40.exe Windows Security.exe PID 4800 wrote to memory of 1008 4800 0fdee64f4eb558b0d6e1a5a568095e40.exe Windows Security.exe PID 4800 wrote to memory of 1412 4800 0fdee64f4eb558b0d6e1a5a568095e40.exe powershell.exe PID 4800 wrote to memory of 1412 4800 0fdee64f4eb558b0d6e1a5a568095e40.exe powershell.exe PID 4800 wrote to memory of 1412 4800 0fdee64f4eb558b0d6e1a5a568095e40.exe powershell.exe PID 1008 wrote to memory of 1728 1008 Windows Security.exe Windows Security.exe PID 1008 wrote to memory of 1728 1008 Windows Security.exe Windows Security.exe PID 1008 wrote to memory of 1728 1008 Windows Security.exe Windows Security.exe PID 1008 wrote to memory of 1728 1008 Windows Security.exe Windows Security.exe PID 1008 wrote to memory of 1728 1008 Windows Security.exe Windows Security.exe PID 1008 wrote to memory of 1728 1008 Windows Security.exe Windows Security.exe PID 1008 wrote to memory of 1728 1008 Windows Security.exe Windows Security.exe PID 1008 wrote to memory of 1728 1008 Windows Security.exe Windows Security.exe PID 1728 wrote to memory of 1604 1728 Windows Security.exe schtasks.exe PID 1728 wrote to memory of 1604 1728 Windows Security.exe schtasks.exe PID 1728 wrote to memory of 1604 1728 Windows Security.exe schtasks.exe PID 4800 wrote to memory of 1424 4800 0fdee64f4eb558b0d6e1a5a568095e40.exe cmd.exe PID 4800 wrote to memory of 1424 4800 0fdee64f4eb558b0d6e1a5a568095e40.exe cmd.exe PID 4800 wrote to memory of 1424 4800 0fdee64f4eb558b0d6e1a5a568095e40.exe cmd.exe PID 1424 wrote to memory of 4984 1424 cmd.exe cmd.exe PID 1424 wrote to memory of 4984 1424 cmd.exe cmd.exe PID 1424 wrote to memory of 4984 1424 cmd.exe cmd.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\0fdee64f4eb558b0d6e1a5a568095e40.exe"C:\Users\Admin\AppData\Local\Temp\0fdee64f4eb558b0d6e1a5a568095e40.exe"1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2636 -
C:\Users\Admin\AppData\Local\Temp\0fdee64f4eb558b0d6e1a5a568095e40.exe"C:\Users\Admin\AppData\Local\Temp\0fdee64f4eb558b0d6e1a5a568095e40.exe"2⤵
- Modifies Windows Defender Real-time Protection settings
- Checks computer location settings
- Windows security modification
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4800 -
C:\Windows\SysWOW64\schtasks.exe"schtasks" /create /tn "Windows Update Service" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\0fdee64f4eb558b0d6e1a5a568095e40.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
PID:3760
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C:\Users\Admin\AppData\Roaming\Windows Security Update\Windows Security.exe"C:\Users\Admin\AppData\Roaming\Windows Security Update\Windows Security.exe"3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1008 -
C:\Users\Admin\AppData\Roaming\Windows Security Update\Windows Security.exe"C:\Users\Admin\AppData\Roaming\Windows Security Update\Windows Security.exe"4⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1728 -
C:\Windows\SysWOW64\schtasks.exe"schtasks" /create /tn "Windows Update Service" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows Security Update\Windows Security.exe" /rl HIGHEST /f5⤵
- Creates scheduled task(s)
PID:1604
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"powershell" Get-MpPreference -verbose3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1412
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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:1424 -
C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*4⤵PID:4984
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4800 -s 24923⤵
- Program crash
PID:3684
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 4800 -ip 48001⤵PID:764
Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
1Windows Service
1Scheduled Task/Job
1Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\0fdee64f4eb558b0d6e1a5a568095e40.exe.log
Filesize507B
MD58cf94b5356be60247d331660005941ec
SHA1fdedb361f40f22cb6a086c808fc0056d4e421131
SHA25652a5b2d36f2b72cb02c695cf7ef46444dda73d4ea82a73e0894c805fa9987bc0
SHA512b886dfc8bf03f8627f051fb6e2ac40ae2e7713584695a365728eb2e2c87217830029aa35bd129c642fa03dde3f7a7dd5690b16248676be60a6bb5f497fb23651
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Filesize
60B
MD5d17fe0a3f47be24a6453e9ef58c94641
SHA16ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA25696ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA5125b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
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Filesize
229B
MD543d543e5d161b2b8e4f25eaa1554fd29
SHA10cfd0be3874207a243ed9b714855a13b556dff3e
SHA25661ba014e1c98a41743e9230886a46e752593026c55f0d9e6d95631622e95c532
SHA5122f355c01e44f55f46cbe6d92d7afc280952e521a4a1efbe61fb7d57bb5c8764ff5d94489436652b33a7394bcb117ea61c33fa13d4b40dc49807e56d1882a7d2a
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Filesize
880KB
MD50fdee64f4eb558b0d6e1a5a568095e40
SHA155ca1696afa36ab5f36d3c2944a03bb988335d97
SHA256c7a070b7e06000af25f9fe5f44cfacfd4ac4a02371369267ad10cf3beaed8d4b
SHA512ddf3de5d0f69a29818f683c46ccd70891455f8781e46cf1ac37b740b67e74eea4408920ef3a54878707c81b74b2dc13337838a6521880a0c9f912cc7251bfe44