Analysis
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max time kernel
149s -
max time network
150s -
platform
windows7_x64 -
resource
win7-20240508-en -
resource tags
arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system -
submitted
20-06-2024 01:13
Behavioral task
behavioral1
Sample
164e19d48c8d3ed423d4d4c68dff47899f375b6ef4f2a27005562e16b3a8d33f.exe
Resource
win7-20240508-en
General
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Target
164e19d48c8d3ed423d4d4c68dff47899f375b6ef4f2a27005562e16b3a8d33f.exe
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Size
3.1MB
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MD5
1b27e622f4edbbdd8fc93a0d1c129607
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SHA1
3e7b42dd10c01f632f158cc96701f6ba49ebec48
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SHA256
164e19d48c8d3ed423d4d4c68dff47899f375b6ef4f2a27005562e16b3a8d33f
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SHA512
bd6d609019f06649db920244a91ef5a2f105ea81055cdd53df72e737e1aae75b340060f45cb56383d201c154591a0a297fd69e1d09c5239b96ea5765a823ef5c
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SSDEEP
49152:kvHI22SsaNYfdPBldt698dBcjHn30LdBhJo2d/UTHHB72eh2NT:kvo22SsaNYfdPBldt6+dBcjH30nv
Malware Config
Extracted
quasar
1.4.1
Office04
94.228.166.40:4782
172a89d7-b9b2-4d82-b5ed-6beb5326f544
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encryption_key
7970C2029EDBB83E6BD65073BE18684AC9FF3F48
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install_name
KR6nDu9fLhop1bFe.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
Defender.proces
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subdirectory
SubDir
Signatures
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Quasar payload 3 IoCs
Processes:
resource yara_rule behavioral1/memory/1232-1-0x0000000001050000-0x0000000001374000-memory.dmp family_quasar C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe family_quasar behavioral1/memory/2908-8-0x0000000000330000-0x0000000000654000-memory.dmp family_quasar -
Executes dropped EXE 1 IoCs
Processes:
KR6nDu9fLhop1bFe.exepid process 2908 KR6nDu9fLhop1bFe.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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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 2352 schtasks.exe 2760 schtasks.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
164e19d48c8d3ed423d4d4c68dff47899f375b6ef4f2a27005562e16b3a8d33f.exeKR6nDu9fLhop1bFe.exedescription pid process Token: SeDebugPrivilege 1232 164e19d48c8d3ed423d4d4c68dff47899f375b6ef4f2a27005562e16b3a8d33f.exe Token: SeDebugPrivilege 2908 KR6nDu9fLhop1bFe.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
Processes:
KR6nDu9fLhop1bFe.exepid process 2908 KR6nDu9fLhop1bFe.exe -
Suspicious use of SendNotifyMessage 1 IoCs
Processes:
KR6nDu9fLhop1bFe.exepid process 2908 KR6nDu9fLhop1bFe.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
KR6nDu9fLhop1bFe.exepid process 2908 KR6nDu9fLhop1bFe.exe -
Suspicious use of WriteProcessMemory 9 IoCs
Processes:
164e19d48c8d3ed423d4d4c68dff47899f375b6ef4f2a27005562e16b3a8d33f.exeKR6nDu9fLhop1bFe.exedescription pid process target process PID 1232 wrote to memory of 2352 1232 164e19d48c8d3ed423d4d4c68dff47899f375b6ef4f2a27005562e16b3a8d33f.exe schtasks.exe PID 1232 wrote to memory of 2352 1232 164e19d48c8d3ed423d4d4c68dff47899f375b6ef4f2a27005562e16b3a8d33f.exe schtasks.exe PID 1232 wrote to memory of 2352 1232 164e19d48c8d3ed423d4d4c68dff47899f375b6ef4f2a27005562e16b3a8d33f.exe schtasks.exe PID 1232 wrote to memory of 2908 1232 164e19d48c8d3ed423d4d4c68dff47899f375b6ef4f2a27005562e16b3a8d33f.exe KR6nDu9fLhop1bFe.exe PID 1232 wrote to memory of 2908 1232 164e19d48c8d3ed423d4d4c68dff47899f375b6ef4f2a27005562e16b3a8d33f.exe KR6nDu9fLhop1bFe.exe PID 1232 wrote to memory of 2908 1232 164e19d48c8d3ed423d4d4c68dff47899f375b6ef4f2a27005562e16b3a8d33f.exe KR6nDu9fLhop1bFe.exe PID 2908 wrote to memory of 2760 2908 KR6nDu9fLhop1bFe.exe schtasks.exe PID 2908 wrote to memory of 2760 2908 KR6nDu9fLhop1bFe.exe schtasks.exe PID 2908 wrote to memory of 2760 2908 KR6nDu9fLhop1bFe.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\164e19d48c8d3ed423d4d4c68dff47899f375b6ef4f2a27005562e16b3a8d33f.exe"C:\Users\Admin\AppData\Local\Temp\164e19d48c8d3ed423d4d4c68dff47899f375b6ef4f2a27005562e16b3a8d33f.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\schtasks.exe"schtasks" /create /tn "Defender.proces" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
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C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe"C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\schtasks.exe"schtasks" /create /tn "Defender.proces" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exeFilesize
3.1MB
MD51b27e622f4edbbdd8fc93a0d1c129607
SHA13e7b42dd10c01f632f158cc96701f6ba49ebec48
SHA256164e19d48c8d3ed423d4d4c68dff47899f375b6ef4f2a27005562e16b3a8d33f
SHA512bd6d609019f06649db920244a91ef5a2f105ea81055cdd53df72e737e1aae75b340060f45cb56383d201c154591a0a297fd69e1d09c5239b96ea5765a823ef5c
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memory/1232-0-0x000007FEF5C23000-0x000007FEF5C24000-memory.dmpFilesize
4KB
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memory/1232-1-0x0000000001050000-0x0000000001374000-memory.dmpFilesize
3.1MB
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memory/1232-2-0x000007FEF5C20000-0x000007FEF660C000-memory.dmpFilesize
9.9MB
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memory/1232-9-0x000007FEF5C20000-0x000007FEF660C000-memory.dmpFilesize
9.9MB
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memory/2908-8-0x0000000000330000-0x0000000000654000-memory.dmpFilesize
3.1MB
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memory/2908-10-0x000007FEF5C20000-0x000007FEF660C000-memory.dmpFilesize
9.9MB
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memory/2908-11-0x000007FEF5C20000-0x000007FEF660C000-memory.dmpFilesize
9.9MB
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memory/2908-12-0x000007FEF5C20000-0x000007FEF660C000-memory.dmpFilesize
9.9MB