Analysis
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max time kernel
149s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20240802-en -
resource tags
arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system -
submitted
03-08-2024 10:06
Behavioral task
behavioral1
Sample
ia.exe
Resource
win7-20240708-en
General
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Target
ia.exe
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Size
3.1MB
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MD5
5828b4f3710d309100812b3f698a34c2
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SHA1
64c5979a98bc2855bdc440d9fc669d5f63cfaa9f
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SHA256
19a7fd629bf8badfd4703785c8af9fbb3396689a47d2375274c1fae6629ee24b
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SHA512
2888bd591344bf43cb03edc7c70e8a6a9200c17f97df0ea3bb0883a5b0aa62b4464d736e659f7b23a4303b3376e36c302882ff85054982649be9a1ccbca50127
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SSDEEP
49152:Pv9t62XlaSFNWPjljiFa2RoUYIWgloUBxZ/oGdQeTHHB72eh2NT:Pv/62XlaSFNWPjljiFXRoUYI/ou
Malware Config
Extracted
quasar
1.4.1
Office04
192.168.1.184:4782
63d17811-7d89-4513-a09e-567135741dc7
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encryption_key
F3BEC07E3E649D50CEE84302EC0FDD43A47F4E75
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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
ia
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subdirectory
ia
Signatures
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Quasar payload 2 IoCs
Processes:
resource yara_rule behavioral2/memory/3424-1-0x0000000000FD0000-0x00000000012F4000-memory.dmp family_quasar C:\Windows\System32\ia\Client.exe family_quasar -
Executes dropped EXE 1 IoCs
Processes:
Client.exepid process 1644 Client.exe -
Drops file in System32 directory 5 IoCs
Processes:
ia.exeClient.exedescription ioc process File created C:\Windows\system32\ia\Client.exe ia.exe File opened for modification C:\Windows\system32\ia\Client.exe ia.exe File opened for modification C:\Windows\system32\ia ia.exe File opened for modification C:\Windows\system32\ia\Client.exe Client.exe File opened for modification C:\Windows\system32\ia 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.
Processes:
schtasks.exeschtasks.exepid process 4020 schtasks.exe 2140 schtasks.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
ia.exeClient.exedescription pid process Token: SeDebugPrivilege 3424 ia.exe Token: SeDebugPrivilege 1644 Client.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
ia.exeClient.exedescription pid process target process PID 3424 wrote to memory of 2140 3424 ia.exe schtasks.exe PID 3424 wrote to memory of 2140 3424 ia.exe schtasks.exe PID 3424 wrote to memory of 1644 3424 ia.exe Client.exe PID 3424 wrote to memory of 1644 3424 ia.exe Client.exe PID 1644 wrote to memory of 4020 1644 Client.exe schtasks.exe PID 1644 wrote to memory of 4020 1644 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\ia.exe"C:\Users\Admin\AppData\Local\Temp\ia.exe"1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3424 -
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "ia" /sc ONLOGON /tr "C:\Windows\system32\ia\Client.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
PID:2140 -
C:\Windows\system32\ia\Client.exe"C:\Windows\system32\ia\Client.exe"2⤵
- Executes dropped EXE
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1644 -
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "ia" /sc ONLOGON /tr "C:\Windows\system32\ia\Client.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
PID:4020
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
3.1MB
MD55828b4f3710d309100812b3f698a34c2
SHA164c5979a98bc2855bdc440d9fc669d5f63cfaa9f
SHA25619a7fd629bf8badfd4703785c8af9fbb3396689a47d2375274c1fae6629ee24b
SHA5122888bd591344bf43cb03edc7c70e8a6a9200c17f97df0ea3bb0883a5b0aa62b4464d736e659f7b23a4303b3376e36c302882ff85054982649be9a1ccbca50127