Analysis
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max time kernel
150s -
max time network
154s -
platform
windows10-2004_x64 -
resource
win10v2004-20240802-en -
resource tags
arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system -
submitted
18/08/2024, 22:12
Behavioral task
behavioral1
Sample
844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983.exe
Resource
win7-20240704-en
General
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Target
844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983.exe
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Size
3.4MB
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MD5
bc04ef1699a3b490ff2703a0bb2dcca0
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SHA1
b3f70784fb7c7ef0a3cca81280ede2ffe2671e35
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SHA256
844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983
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SHA512
e3d11bd54f4409c3a846e6466063d5e29f8222b3c2a2291b19401632a7a3884ed6bde8327c664f2b43e6e67914fca1eae4805730adbfd37706ac4d7e0a28a2e1
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SSDEEP
49152:xei8dGFjxJFp/DGoye3Z4LVYcl9v6igI2VSG3THHB72eh2NTfXDW:xeCFjxJTbGor3Z4LVY9r+JT
Malware Config
Extracted
quasar
1.4.1
SKIDS
147.185.221.22:10340
9b51d4f5-bfe4-4a06-ba47-dcfbf9fe8529
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encryption_key
9E968F05BD874BA1BE086FD1774A027473823F49
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install_name
Windows Host Process.exe
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log_directory
Windows-Logs
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reconnect_delay
3000
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startup_key
Windows Host Process
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subdirectory
Windows
Signatures
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Quasar payload 2 IoCs
resource yara_rule behavioral2/memory/744-1-0x0000000000070000-0x00000000003D0000-memory.dmp family_quasar behavioral2/files/0x0007000000023434-6.dat family_quasar -
Executes dropped EXE 1 IoCs
pid Process 4888 Windows Host Process.exe -
Drops file in System32 directory 5 IoCs
description ioc Process File opened for modification C:\Windows\system32\Windows Windows Host Process.exe File created C:\Windows\system32\Windows\Windows Host Process.exe 844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983.exe File opened for modification C:\Windows\system32\Windows\Windows Host Process.exe 844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983.exe File opened for modification C:\Windows\system32\Windows 844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983.exe File opened for modification C:\Windows\system32\Windows\Windows Host Process.exe Windows Host Process.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 3820 schtasks.exe 3080 schtasks.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 744 844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983.exe Token: SeDebugPrivilege 4888 Windows Host Process.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 4888 Windows Host Process.exe -
Suspicious use of WriteProcessMemory 6 IoCs
description pid Process procid_target PID 744 wrote to memory of 3820 744 844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983.exe 84 PID 744 wrote to memory of 3820 744 844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983.exe 84 PID 744 wrote to memory of 4888 744 844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983.exe 87 PID 744 wrote to memory of 4888 744 844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983.exe 87 PID 4888 wrote to memory of 3080 4888 Windows Host Process.exe 92 PID 4888 wrote to memory of 3080 4888 Windows Host Process.exe 92 -
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\844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983.exe"C:\Users\Admin\AppData\Local\Temp\844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983.exe"1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:744 -
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
PID:3820
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C:\Windows\system32\Windows\Windows Host Process.exe"C:\Windows\system32\Windows\Windows Host Process.exe"2⤵
- Executes dropped EXE
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4888 -
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
PID:3080
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
3.4MB
MD5bc04ef1699a3b490ff2703a0bb2dcca0
SHA1b3f70784fb7c7ef0a3cca81280ede2ffe2671e35
SHA256844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983
SHA512e3d11bd54f4409c3a846e6466063d5e29f8222b3c2a2291b19401632a7a3884ed6bde8327c664f2b43e6e67914fca1eae4805730adbfd37706ac4d7e0a28a2e1