Analysis
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max time kernel
121s -
max time network
155s -
platform
windows10-2004_x64 -
resource
win10v2004-20240709-en -
resource tags
arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system -
submitted
28-07-2024 15:16
Behavioral task
behavioral1
Sample
1d686b05f745875e28939abe357baedd169b59f5a0d88.exe
Resource
win7-20240704-en
General
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Target
1d686b05f745875e28939abe357baedd169b59f5a0d88.exe
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Size
3.1MB
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MD5
e3e1f7fa42dd68f410bb885f0aefe5e3
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SHA1
d51edc519d86a11e6533cd4cac8f190dd3f7d4bb
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SHA256
1d686b05f745875e28939abe357baedd169b59f5a0d8825b602fd803a6303ba3
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SHA512
92ac0379074366a4dbb9235d8c61935be6d8086629611dbcdecdaf680a0a8636f7810d4f6394dbdee5b1e463842284ab9855534da4627677965557e8eb609aa3
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SSDEEP
49152:6v5t62XlaSFNWPjljiFa2RoUYIHSz3farvLoGdRbTHHB72eh2NT:6vT62XlaSFNWPjljiFXRoUYI+38B
Malware Config
Extracted
quasar
1.4.1
Office04
193.42.11.9:4329
4c2abd13-f813-4493-8701-1c7115caee61
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encryption_key
665C8B508EC328B12F8F1A2A20662BF0DBA9F069
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install_name
edge.exe
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log_directory
Logs
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reconnect_delay
1000
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startup_key
Chrome
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subdirectory
browser
Signatures
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Quasar payload 2 IoCs
Processes:
resource yara_rule behavioral2/memory/4100-1-0x00000000000B0000-0x00000000003D4000-memory.dmp family_quasar C:\Users\Admin\AppData\Roaming\browser\edge.exe family_quasar -
Executes dropped EXE 1 IoCs
Processes:
edge.exepid process 2980 edge.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 1320 schtasks.exe 3440 schtasks.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
1d686b05f745875e28939abe357baedd169b59f5a0d88.exeedge.exedescription pid process Token: SeDebugPrivilege 4100 1d686b05f745875e28939abe357baedd169b59f5a0d88.exe Token: SeDebugPrivilege 2980 edge.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
edge.exepid process 2980 edge.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
1d686b05f745875e28939abe357baedd169b59f5a0d88.exeedge.exedescription pid process target process PID 4100 wrote to memory of 1320 4100 1d686b05f745875e28939abe357baedd169b59f5a0d88.exe schtasks.exe PID 4100 wrote to memory of 1320 4100 1d686b05f745875e28939abe357baedd169b59f5a0d88.exe schtasks.exe PID 4100 wrote to memory of 2980 4100 1d686b05f745875e28939abe357baedd169b59f5a0d88.exe edge.exe PID 4100 wrote to memory of 2980 4100 1d686b05f745875e28939abe357baedd169b59f5a0d88.exe edge.exe PID 2980 wrote to memory of 3440 2980 edge.exe schtasks.exe PID 2980 wrote to memory of 3440 2980 edge.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\1d686b05f745875e28939abe357baedd169b59f5a0d88.exe"C:\Users\Admin\AppData\Local\Temp\1d686b05f745875e28939abe357baedd169b59f5a0d88.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4100 -
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Chrome" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\browser\edge.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
PID:1320 -
C:\Users\Admin\AppData\Roaming\browser\edge.exe"C:\Users\Admin\AppData\Roaming\browser\edge.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2980 -
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Chrome" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\browser\edge.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
PID:3440
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
3.1MB
MD5e3e1f7fa42dd68f410bb885f0aefe5e3
SHA1d51edc519d86a11e6533cd4cac8f190dd3f7d4bb
SHA2561d686b05f745875e28939abe357baedd169b59f5a0d8825b602fd803a6303ba3
SHA51292ac0379074366a4dbb9235d8c61935be6d8086629611dbcdecdaf680a0a8636f7810d4f6394dbdee5b1e463842284ab9855534da4627677965557e8eb609aa3