Analysis
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max time kernel
135s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20230220-en -
resource tags
arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system -
submitted
01-06-2023 15:03
Behavioral task
behavioral1
Sample
08429299.exe
Resource
win7-20230220-en
Behavioral task
behavioral2
Sample
08429299.exe
Resource
win10v2004-20230220-en
General
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Target
08429299.exe
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Size
3.1MB
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MD5
4bfcf945a94b7497d44dec0e663e2903
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SHA1
1456b93f6ef6225a635955662641524e95e4f5ce
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SHA256
e5556b22dcd6d7d26ce0e58e050632a0a03bf9fa2515953aaca8473e5f959f1d
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SHA512
2ff0b5dab62e771429e44a3b1245d6839487b13a560075f054c5795cc1c89cd0f3a2b4eb3a951c1483f88fc2dae33a5bac0f4b60d93c5c1acc50c177f4311a3c
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SSDEEP
49152:EvblL26AaNeWgPhlmVqvMQ7XSKVDxNESE6k/iNLoGd+8THHB72eh2NT:EvBL26AaNeWgPhlmVqkQ7XSKVxFF
Malware Config
Extracted
quasar
1.4.1
Telegram Users
xegefi6666-30878.portmap.host:30878
fa554b4d-a1d6-4917-9f68-8f040924e03d
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encryption_key
B736867CD516C8B6FB67365ADF945A5FC6943067
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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
Windows Defender
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subdirectory
SubDir
Signatures
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Quasar payload 1 IoCs
Processes:
resource yara_rule behavioral2/memory/4220-133-0x0000000000720000-0x0000000000A44000-memory.dmp family_quasar -
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
08429299.exedescription pid process Token: SeDebugPrivilege 4220 08429299.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
08429299.exepid process 4220 08429299.exe -
Suspicious use of WriteProcessMemory 2 IoCs
Processes:
08429299.exedescription pid process target process PID 4220 wrote to memory of 1480 4220 08429299.exe schtasks.exe PID 4220 wrote to memory of 1480 4220 08429299.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\08429299.exe"C:\Users\Admin\AppData\Local\Temp\08429299.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Windows Defender" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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memory/4220-133-0x0000000000720000-0x0000000000A44000-memory.dmpFilesize
3.1MB
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memory/4220-134-0x000000001B670000-0x000000001B680000-memory.dmpFilesize
64KB
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memory/4220-135-0x000000001C1A0000-0x000000001C1F0000-memory.dmpFilesize
320KB
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memory/4220-136-0x000000001C2B0000-0x000000001C362000-memory.dmpFilesize
712KB
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memory/4220-139-0x000000001C1F0000-0x000000001C202000-memory.dmpFilesize
72KB
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memory/4220-140-0x000000001C250000-0x000000001C28C000-memory.dmpFilesize
240KB
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memory/4220-141-0x000000001B670000-0x000000001B680000-memory.dmpFilesize
64KB