Analysis
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max time kernel
2s -
max time network
6s -
platform
windows11-21h2_x64 -
resource
win11-20241007-en -
resource tags
arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system -
submitted
23-01-2025 04:10
General
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Target
STAR HOOK.exe
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Size
3.1MB
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MD5
e05108dad2df0d077c02297b720bd7aa
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SHA1
5f86c17a4287fad6c8d4339c97bcca1549ae9d96
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SHA256
8887b67a5cf1e1e975a9b37c77509652e475607e02c5d744ab2b843edc84cc5a
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SHA512
9953ac0465609e19674cac51f67ec69d25e8b9500995cb1b93c46bdd8bfda0519ddfb40ace36575435f65b5d63dbc5eebe743d6855943e43cf79975a9258cf3f
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SSDEEP
49152:rvyI22SsaNYfdPBldt698dBcjHyrjGgJ8QoGdQTHHB72eh2NT:rvf22SsaNYfdPBldt6+dBcjHyrfJF
Malware Config
Extracted
quasar
1.4.1
Office04
192.168.12.223:4782
9ff7b014-19b2-444b-95dd-ac9edadfe699
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encryption_key
39B0A38C739CA03F425D52D6DB813486CCB3B858
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install_name
Client.exe
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log_directory
HITS FOR QUASAR
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reconnect_delay
3000
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startup_key
Quasar Client 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 behavioral1/memory/560-1-0x0000000000DD0000-0x00000000010F4000-memory.dmp family_quasar behavioral1/files/0x001a00000002ab06-6.dat family_quasar -
Executes dropped EXE 1 IoCs
pid Process 4216 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.
pid Process 5116 schtasks.exe 2512 schtasks.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 560 STAR HOOK.exe Token: SeDebugPrivilege 4216 Client.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 4216 Client.exe -
Suspicious use of WriteProcessMemory 6 IoCs
description pid Process procid_target PID 560 wrote to memory of 5116 560 STAR HOOK.exe 77 PID 560 wrote to memory of 5116 560 STAR HOOK.exe 77 PID 560 wrote to memory of 4216 560 STAR HOOK.exe 79 PID 560 wrote to memory of 4216 560 STAR HOOK.exe 79 PID 4216 wrote to memory of 2512 4216 Client.exe 80 PID 4216 wrote to memory of 2512 4216 Client.exe 80 -
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\STAR HOOK.exe"C:\Users\Admin\AppData\Local\Temp\STAR HOOK.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:560 -
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
PID:5116
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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:4216 -
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
PID:2512
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
3.1MB
MD5e05108dad2df0d077c02297b720bd7aa
SHA15f86c17a4287fad6c8d4339c97bcca1549ae9d96
SHA2568887b67a5cf1e1e975a9b37c77509652e475607e02c5d744ab2b843edc84cc5a
SHA5129953ac0465609e19674cac51f67ec69d25e8b9500995cb1b93c46bdd8bfda0519ddfb40ace36575435f65b5d63dbc5eebe743d6855943e43cf79975a9258cf3f