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Analysis
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max time kernel
102s -
max time network
118s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
06/12/2024, 10:57
Behavioral task
behavioral1
Sample
3a3a281e6488b98895402f29a3756463f018ca96b4ebfcfee43e6e7d71e1515bN.exe
Resource
win7-20240708-en
General
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Target
3a3a281e6488b98895402f29a3756463f018ca96b4ebfcfee43e6e7d71e1515bN.exe
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Size
3.1MB
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MD5
ab02937fb8fc8ccce7853d22fe9ff280
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SHA1
cf180eba95b42bcf3ff80ed3e2922d7805ec1f72
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SHA256
3a3a281e6488b98895402f29a3756463f018ca96b4ebfcfee43e6e7d71e1515b
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SHA512
7fd897a2f658181fd68cc036069c20f7a25afb92d07684005085b68d1f7e96dcb84688f0b8132ca0c200c2d0ac698e6a52014a0b8c8ea2bfe4b314c4756ee1b5
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SSDEEP
49152:Vvht62XlaSFNWPjljiFa2RoUYIdqWhybRjPLoGddJfTHHB72eh2NT:VvL62XlaSFNWPjljiFXRoUYIdqWhWT
Malware Config
Extracted
quasar
1.4.1
Office04
192.168.0.17:5555
3b1732e2-6a81-44bb-8d99-4472451b1cf3
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encryption_key
871AD53C1EE1C8F197D53D3E1DCA45CC62B82B8D
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install_name
javaconfig.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
JavaUpdater
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subdirectory
SubDir
Signatures
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Quasar family
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Quasar payload 2 IoCs
resource yara_rule behavioral2/memory/548-1-0x00000000007A0000-0x0000000000AC6000-memory.dmp family_quasar behavioral2/files/0x000d000000023a69-6.dat family_quasar -
Executes dropped EXE 1 IoCs
pid Process 932 javaconfig.exe -
Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 4676 schtasks.exe 3452 schtasks.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 548 3a3a281e6488b98895402f29a3756463f018ca96b4ebfcfee43e6e7d71e1515bN.exe Token: SeDebugPrivilege 932 javaconfig.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
pid Process 932 javaconfig.exe -
Suspicious use of SendNotifyMessage 1 IoCs
pid Process 932 javaconfig.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 932 javaconfig.exe -
Suspicious use of WriteProcessMemory 6 IoCs
description pid Process procid_target PID 548 wrote to memory of 4676 548 3a3a281e6488b98895402f29a3756463f018ca96b4ebfcfee43e6e7d71e1515bN.exe 84 PID 548 wrote to memory of 4676 548 3a3a281e6488b98895402f29a3756463f018ca96b4ebfcfee43e6e7d71e1515bN.exe 84 PID 548 wrote to memory of 932 548 3a3a281e6488b98895402f29a3756463f018ca96b4ebfcfee43e6e7d71e1515bN.exe 86 PID 548 wrote to memory of 932 548 3a3a281e6488b98895402f29a3756463f018ca96b4ebfcfee43e6e7d71e1515bN.exe 86 PID 932 wrote to memory of 3452 932 javaconfig.exe 87 PID 932 wrote to memory of 3452 932 javaconfig.exe 87 -
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\3a3a281e6488b98895402f29a3756463f018ca96b4ebfcfee43e6e7d71e1515bN.exe"C:\Users\Admin\AppData\Local\Temp\3a3a281e6488b98895402f29a3756463f018ca96b4ebfcfee43e6e7d71e1515bN.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:548 -
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "JavaUpdater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\javaconfig.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
PID:4676
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C:\Users\Admin\AppData\Roaming\SubDir\javaconfig.exe"C:\Users\Admin\AppData\Roaming\SubDir\javaconfig.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:932 -
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "JavaUpdater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\javaconfig.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
PID:3452
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
3.1MB
MD5ab02937fb8fc8ccce7853d22fe9ff280
SHA1cf180eba95b42bcf3ff80ed3e2922d7805ec1f72
SHA2563a3a281e6488b98895402f29a3756463f018ca96b4ebfcfee43e6e7d71e1515b
SHA5127fd897a2f658181fd68cc036069c20f7a25afb92d07684005085b68d1f7e96dcb84688f0b8132ca0c200c2d0ac698e6a52014a0b8c8ea2bfe4b314c4756ee1b5