Analysis
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max time kernel
146s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
26-03-2024 02:24
Behavioral task
behavioral1
Sample
561d2b135a6200ef094b222eb47af87a.exe
Resource
win7-20240221-en
General
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Target
561d2b135a6200ef094b222eb47af87a.exe
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Size
3.1MB
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MD5
561d2b135a6200ef094b222eb47af87a
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SHA1
4db2f2254cae3695a0ffa7ccdc13097db254cd8c
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SHA256
c458feb66832df6a0c361d951c60bcda34c4f5c82652d25c5e4a1aa4c41d8d94
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SHA512
6bd32a9099968b13150a16ee919684e319a67a55dc436fb36157901528e5ccf0283daecdafd07876186f00af13a3bba170a6328926156578a2c06455772b0094
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SSDEEP
49152:mvyI22SsaNYfdPBldt698dBcjHHCy1JcLoGdVWTHHB72eh2NT:mvf22SsaNYfdPBldt6+dBcjHHCv
Malware Config
Extracted
quasar
1.4.1
Slave
140.238.91.110:36039
df49f69a-66a2-4b6e-bb60-18c12b5b14df
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encryption_key
6A1671418BB270D703D501AB8E9B41E8D413B6D3
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install_name
Client.exe
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log_directory
Win64ErrorLogs
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reconnect_delay
3000
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startup_key
Windows Boot Menu
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subdirectory
SubDir
Signatures
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Quasar payload 2 IoCs
Processes:
resource yara_rule behavioral2/memory/2300-0-0x00000000009B0000-0x0000000000CD4000-memory.dmp family_quasar C:\Users\Admin\AppData\Roaming\SubDir\Client.exe family_quasar -
Executes dropped EXE 1 IoCs
Processes:
Client.exepid process 1364 Client.exe -
Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
Processes:
schtasks.exeschtasks.exepid process 468 schtasks.exe 4812 schtasks.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
561d2b135a6200ef094b222eb47af87a.exeClient.exedescription pid process Token: SeDebugPrivilege 2300 561d2b135a6200ef094b222eb47af87a.exe Token: SeDebugPrivilege 1364 Client.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
Client.exepid process 1364 Client.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
561d2b135a6200ef094b222eb47af87a.exeClient.exedescription pid process target process PID 2300 wrote to memory of 468 2300 561d2b135a6200ef094b222eb47af87a.exe schtasks.exe PID 2300 wrote to memory of 468 2300 561d2b135a6200ef094b222eb47af87a.exe schtasks.exe PID 2300 wrote to memory of 1364 2300 561d2b135a6200ef094b222eb47af87a.exe Client.exe PID 2300 wrote to memory of 1364 2300 561d2b135a6200ef094b222eb47af87a.exe Client.exe PID 1364 wrote to memory of 4812 1364 Client.exe schtasks.exe PID 1364 wrote to memory of 4812 1364 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\561d2b135a6200ef094b222eb47af87a.exe"C:\Users\Admin\AppData\Local\Temp\561d2b135a6200ef094b222eb47af87a.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Windows Boot Menu" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
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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
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Windows Boot Menu" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Roaming\SubDir\Client.exeFilesize
3.1MB
MD5561d2b135a6200ef094b222eb47af87a
SHA14db2f2254cae3695a0ffa7ccdc13097db254cd8c
SHA256c458feb66832df6a0c361d951c60bcda34c4f5c82652d25c5e4a1aa4c41d8d94
SHA5126bd32a9099968b13150a16ee919684e319a67a55dc436fb36157901528e5ccf0283daecdafd07876186f00af13a3bba170a6328926156578a2c06455772b0094
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memory/1364-10-0x00007FFF92DA0000-0x00007FFF93861000-memory.dmpFilesize
10.8MB
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memory/1364-11-0x000000001B9F0000-0x000000001BA00000-memory.dmpFilesize
64KB
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memory/1364-12-0x000000001BA00000-0x000000001BA50000-memory.dmpFilesize
320KB
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memory/1364-13-0x000000001C390000-0x000000001C442000-memory.dmpFilesize
712KB
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memory/1364-14-0x00007FFF92DA0000-0x00007FFF93861000-memory.dmpFilesize
10.8MB
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memory/1364-15-0x000000001B9F0000-0x000000001BA00000-memory.dmpFilesize
64KB
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memory/2300-0-0x00000000009B0000-0x0000000000CD4000-memory.dmpFilesize
3.1MB
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memory/2300-1-0x00007FFF92DA0000-0x00007FFF93861000-memory.dmpFilesize
10.8MB
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memory/2300-2-0x0000000002ED0000-0x0000000002EE0000-memory.dmpFilesize
64KB
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memory/2300-9-0x00007FFF92DA0000-0x00007FFF93861000-memory.dmpFilesize
10.8MB