Analysis
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max time kernel
149s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
18-04-2024 10:42
Behavioral task
behavioral1
Sample
ratXD.exe
Resource
win7-20240221-en
General
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Target
ratXD.exe
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Size
3.1MB
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MD5
9c5f2f586e52a975593d11710685f846
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SHA1
887006a6849b22cfbf85871e50ab33404097f654
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SHA256
9259a4e7b71dc408f62faa9c6f7f73b5a906466dc9c751bfa8b23f641cc614f2
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SHA512
c3fb61664de1248713b7c1a98d17b344a68d6a676841f174659565e043ec6aecc0c27bd4a47d815e0d19fd070054ff2ca57fb304878b284162a5b9142c2b38bf
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SSDEEP
49152:avCI22SsaNYfdPBldt698dBcjHBY5VBxFUoGdD9THHB72eh2NT:avP22SsaNYfdPBldt6+dBcjHBY5c
Malware Config
Extracted
quasar
1.4.1
Office04
177.72.82.9:5678
62a700ff-4fdb-4af6-b871-ab8a290f0701
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encryption_key
E0A41577673498A6E2FD27CB9AED2F6B83527072
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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
Quasar Client Startup
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subdirectory
SubDir
Signatures
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Quasar payload 2 IoCs
Processes:
resource yara_rule behavioral2/memory/2160-0-0x0000000000850000-0x0000000000B74000-memory.dmp family_quasar C:\Windows\system32\SubDir\Client.exe family_quasar -
Executes dropped EXE 1 IoCs
Processes:
Client.exepid process 4688 Client.exe -
Drops file in System32 directory 2 IoCs
Processes:
ratXD.exedescription ioc process File created C:\Windows\system32\SubDir\Client.exe ratXD.exe File opened for modification C:\Windows\system32\SubDir\Client.exe ratXD.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
ratXD.exeClient.exedescription pid process Token: SeDebugPrivilege 2160 ratXD.exe Token: SeDebugPrivilege 4688 Client.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
Processes:
Client.exepid process 4688 Client.exe -
Suspicious use of SendNotifyMessage 1 IoCs
Processes:
Client.exepid process 4688 Client.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
Client.exepid process 4688 Client.exe -
Suspicious use of WriteProcessMemory 2 IoCs
Processes:
ratXD.exedescription pid process target process PID 2160 wrote to memory of 4688 2160 ratXD.exe Client.exe PID 2160 wrote to memory of 4688 2160 ratXD.exe Client.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\ratXD.exe"C:\Users\Admin\AppData\Local\Temp\ratXD.exe"1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2160 -
C:\Windows\system32\SubDir\Client.exe"C:\Windows\system32\SubDir\Client.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
PID:4688
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C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3532 --field-trial-handle=2304,i,6987730730348465820,3913273227385401271,262144 --variations-seed-version /prefetch:81⤵PID:956
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
3.1MB
MD59c5f2f586e52a975593d11710685f846
SHA1887006a6849b22cfbf85871e50ab33404097f654
SHA2569259a4e7b71dc408f62faa9c6f7f73b5a906466dc9c751bfa8b23f641cc614f2
SHA512c3fb61664de1248713b7c1a98d17b344a68d6a676841f174659565e043ec6aecc0c27bd4a47d815e0d19fd070054ff2ca57fb304878b284162a5b9142c2b38bf