Analysis
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max time kernel
126s -
max time network
144s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
17-12-2024 16:07
Behavioral task
behavioral1
Sample
0d57b81c8c42d3450782af358d0938d813abc28ec18b3ad6c81bd680a3efbbea.exe
Resource
win7-20241010-en
General
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Target
0d57b81c8c42d3450782af358d0938d813abc28ec18b3ad6c81bd680a3efbbea.exe
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Size
3.1MB
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MD5
cff3e677b6383632eff6d1b52cd6d277
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SHA1
0936fb4aa7e39f2b56bc1b4c9364bb95e8f0c2a8
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SHA256
0d57b81c8c42d3450782af358d0938d813abc28ec18b3ad6c81bd680a3efbbea
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SHA512
ddc33da48cf00e6ee4a57a07a98630082082f5cf76b9c1f844b17ff7f8328f0986a0d95f458947c6ca141a657991b31c608d9b3a9bdc83428ee53e55a34c2e61
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SSDEEP
49152:6vht62XlaSFNWPjljiFa2RoUYIz0HxNESEqk/iGLoGd1THHB72eh2NT:6vL62XlaSFNWPjljiFXRoUYI4HxlI
Malware Config
Extracted
quasar
1.4.1
Office04
73.62.14.5:4782
3aaa11be-d135-4877-a61e-c409c29a7a60
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encryption_key
BC9162791FD860195CF75664AE64885B64D5B5CE
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install_name
Client1.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
Startup
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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/2788-1-0x0000000000D40000-0x0000000001064000-memory.dmp family_quasar behavioral2/files/0x0007000000023c97-6.dat family_quasar -
Executes dropped EXE 1 IoCs
pid Process 4704 Client1.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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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 2604 schtasks.exe 4676 schtasks.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 2788 0d57b81c8c42d3450782af358d0938d813abc28ec18b3ad6c81bd680a3efbbea.exe Token: SeDebugPrivilege 4704 Client1.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
pid Process 4704 Client1.exe -
Suspicious use of SendNotifyMessage 1 IoCs
pid Process 4704 Client1.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 4704 Client1.exe -
Suspicious use of WriteProcessMemory 6 IoCs
description pid Process procid_target PID 2788 wrote to memory of 4676 2788 0d57b81c8c42d3450782af358d0938d813abc28ec18b3ad6c81bd680a3efbbea.exe 85 PID 2788 wrote to memory of 4676 2788 0d57b81c8c42d3450782af358d0938d813abc28ec18b3ad6c81bd680a3efbbea.exe 85 PID 2788 wrote to memory of 4704 2788 0d57b81c8c42d3450782af358d0938d813abc28ec18b3ad6c81bd680a3efbbea.exe 87 PID 2788 wrote to memory of 4704 2788 0d57b81c8c42d3450782af358d0938d813abc28ec18b3ad6c81bd680a3efbbea.exe 87 PID 4704 wrote to memory of 2604 4704 Client1.exe 88 PID 4704 wrote to memory of 2604 4704 Client1.exe 88 -
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\0d57b81c8c42d3450782af358d0938d813abc28ec18b3ad6c81bd680a3efbbea.exe"C:\Users\Admin\AppData\Local\Temp\0d57b81c8c42d3450782af358d0938d813abc28ec18b3ad6c81bd680a3efbbea.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2788 -
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client1.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
PID:4676
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C:\Users\Admin\AppData\Roaming\SubDir\Client1.exe"C:\Users\Admin\AppData\Roaming\SubDir\Client1.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:4704 -
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client1.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
PID:2604
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
3.1MB
MD5cff3e677b6383632eff6d1b52cd6d277
SHA10936fb4aa7e39f2b56bc1b4c9364bb95e8f0c2a8
SHA2560d57b81c8c42d3450782af358d0938d813abc28ec18b3ad6c81bd680a3efbbea
SHA512ddc33da48cf00e6ee4a57a07a98630082082f5cf76b9c1f844b17ff7f8328f0986a0d95f458947c6ca141a657991b31c608d9b3a9bdc83428ee53e55a34c2e61