Analysis
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max time kernel
149s -
max time network
150s -
platform
windows7_x64 -
resource
win7-20240708-en -
resource tags
arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system -
submitted
31-07-2024 23:29
Behavioral task
behavioral1
Sample
b8d24236cb542dd0358707623e485d1f8f5b917103f88e7de9d81356a8bd0a62.exe
Resource
win7-20240708-en
General
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Target
b8d24236cb542dd0358707623e485d1f8f5b917103f88e7de9d81356a8bd0a62.exe
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Size
3.1MB
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MD5
7c57eda4bef5b6a6f5ca084dde31deb7
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SHA1
8ed5f1f48691e8d3d5e910b1fd46d0ce0d30eb1e
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SHA256
b8d24236cb542dd0358707623e485d1f8f5b917103f88e7de9d81356a8bd0a62
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SHA512
22d5be1c470f673b7a89ccb972c9b907eb76a070246d071550d891d52d2e4eba2a14df6924b98e1d866ad216e02e3a7cc368f545a578dfe6eaffec461abefe5d
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SSDEEP
49152:ivjI22SsaNYfdPBldt698dBcjHHAek9hBvJGLoGdkTHHB72eh2NT:ivc22SsaNYfdPBldt6+dBcjH2h8
Malware Config
Extracted
quasar
1.4.1
Office04
192.168.1.28:4782
180b92ba-98f1-484b-b54f-264758c8d7f4
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encryption_key
E2AD968D101B25448614267CCA174D53CE1050BA
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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
BootstrapperV1.11
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subdirectory
SubDir
Signatures
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Quasar payload 3 IoCs
Processes:
resource yara_rule behavioral1/memory/2928-1-0x0000000001380000-0x00000000016A4000-memory.dmp family_quasar C:\Users\Admin\AppData\Roaming\SubDir\Client.exe family_quasar behavioral1/memory/2724-8-0x00000000012A0000-0x00000000015C4000-memory.dmp family_quasar -
Executes dropped EXE 1 IoCs
Processes:
Client.exepid process 2724 Client.exe -
Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
Processes:
schtasks.exeschtasks.exepid process 2916 schtasks.exe 2664 schtasks.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
b8d24236cb542dd0358707623e485d1f8f5b917103f88e7de9d81356a8bd0a62.exeClient.exedescription pid process Token: SeDebugPrivilege 2928 b8d24236cb542dd0358707623e485d1f8f5b917103f88e7de9d81356a8bd0a62.exe Token: SeDebugPrivilege 2724 Client.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
Client.exepid process 2724 Client.exe -
Suspicious use of WriteProcessMemory 9 IoCs
Processes:
b8d24236cb542dd0358707623e485d1f8f5b917103f88e7de9d81356a8bd0a62.exeClient.exedescription pid process target process PID 2928 wrote to memory of 2916 2928 b8d24236cb542dd0358707623e485d1f8f5b917103f88e7de9d81356a8bd0a62.exe schtasks.exe PID 2928 wrote to memory of 2916 2928 b8d24236cb542dd0358707623e485d1f8f5b917103f88e7de9d81356a8bd0a62.exe schtasks.exe PID 2928 wrote to memory of 2916 2928 b8d24236cb542dd0358707623e485d1f8f5b917103f88e7de9d81356a8bd0a62.exe schtasks.exe PID 2928 wrote to memory of 2724 2928 b8d24236cb542dd0358707623e485d1f8f5b917103f88e7de9d81356a8bd0a62.exe Client.exe PID 2928 wrote to memory of 2724 2928 b8d24236cb542dd0358707623e485d1f8f5b917103f88e7de9d81356a8bd0a62.exe Client.exe PID 2928 wrote to memory of 2724 2928 b8d24236cb542dd0358707623e485d1f8f5b917103f88e7de9d81356a8bd0a62.exe Client.exe PID 2724 wrote to memory of 2664 2724 Client.exe schtasks.exe PID 2724 wrote to memory of 2664 2724 Client.exe schtasks.exe PID 2724 wrote to memory of 2664 2724 Client.exe schtasks.exe -
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\b8d24236cb542dd0358707623e485d1f8f5b917103f88e7de9d81356a8bd0a62.exe"C:\Users\Admin\AppData\Local\Temp\b8d24236cb542dd0358707623e485d1f8f5b917103f88e7de9d81356a8bd0a62.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2928 -
C:\Windows\system32\schtasks.exe"schtasks" /create /tn "BootstrapperV1.11" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
PID:2916 -
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2724 -
C:\Windows\system32\schtasks.exe"schtasks" /create /tn "BootstrapperV1.11" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
PID:2664
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
3.1MB
MD57c57eda4bef5b6a6f5ca084dde31deb7
SHA18ed5f1f48691e8d3d5e910b1fd46d0ce0d30eb1e
SHA256b8d24236cb542dd0358707623e485d1f8f5b917103f88e7de9d81356a8bd0a62
SHA51222d5be1c470f673b7a89ccb972c9b907eb76a070246d071550d891d52d2e4eba2a14df6924b98e1d866ad216e02e3a7cc368f545a578dfe6eaffec461abefe5d