Analysis
- max time kernel
147s - max time network
150s - platform
windows11-21h2_x64 - resource
win11-20240426-en - resource tags
- submitted
08/06/2024, 16:03
General
- Target ca465fbb9f55ade6177406a840e0fb4ed6f52f18a868865ae51bd70d9b3750cb.exe
- Size 4.6MB
- Sample240608-thhfeadb4y
- SHA256 ca465fbb9f55ade6177406a840e0fb4ed6f52f18a868865ae51bd70d9b3750cb
Malware Config
Extracted
-
socks5systemz
-
bgijeli.com
-
http://bgijeli.com/search/?q=67e28dd83d55fb7e4809ae1d7c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa4be8889b5e4fa9281ae978a071ea771795af8e05c645db22f31dfe339426fa12a466c553adb719a9577e55b8603e983a608ff819c6ed939c3f
-
http://bgijeli.com/search/?q=67e28dd83d55fb7e4809ae1d7c27d78406abdd88be4b12eab517aa5c96bd86ee9d8548855a8bbc896c58e713bc90c91e36b5281fc235a925ed3e03d6bd974a95129070b616e96cc92be510b866db51b9e34eed4c2b14a82966836f23d7f210c7ee92923dcf699012
Signatures
- Detect Socks5Systemz Payload 3 IoCs
- Socks5Systemz
Socks5Systemz is a botnet written in C++.
- Executes dropped EXE 3 IoCs
- Loads dropped DLL 1 IoCs
- Unexpected DNS network traffic destination 1 IoCs
Network traffic to other servers than the configured DNS servers was detected on the DNS port.
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Suspicious use of FindShellTrayWindow 1 IoCs
- Suspicious use of WriteProcessMemory 9 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\ca465fbb9f55ade6177406a840e0fb4ed6f52f18a868865ae51bd70d9b3750cb.exe"C:\Users\Admin\AppData\Local\Temp\ca465fbb9f55ade6177406a840e0fb4ed6f52f18a868865ae51bd70d9b3750cb.exe"1⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\is-49UQD.tmp\ca465fbb9f55ade6177406a840e0fb4ed6f52f18a868865ae51bd70d9b3750cb.tmp"C:\Users\Admin\AppData\Local\Temp\is-49UQD.tmp\ca465fbb9f55ade6177406a840e0fb4ed6f52f18a868865ae51bd70d9b3750cb.tmp" /SL5="$5020A,4578979,54272,C:\Users\Admin\AppData\Local\Temp\ca465fbb9f55ade6177406a840e0fb4ed6f52f18a868865ae51bd70d9b3750cb.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe"C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe" -i3⤵
- Executes dropped EXE
-
-
C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe"C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe" -s3⤵
- Executes dropped EXE
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
lesserextent32.exe
ca465fbb9f55ade6177406a840e0fb4ed6f52f18a868865ae51bd70d9b3750cb.tmp
_iscrypt.dll
memory/3412-59-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/3412-60-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/3412-63-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/3412-64-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/3568-68-0x0000000000400000-0x0000000000414000-memory.dmp
memory/3568-3-0x0000000000401000-0x000000000040B000-memory.dmp
memory/3568-0-0x0000000000400000-0x0000000000414000-memory.dmp
memory/3712-73-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/3712-88-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/3712-117-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/3712-70-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/3712-114-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/3712-76-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/3712-79-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/3712-82-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/3712-83-0x00000000009E0000-0x0000000000A82000-memory.dmp
memory/3712-67-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/3712-93-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/3712-96-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/3712-99-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/3712-102-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/3712-105-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/3712-108-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/3712-109-0x00000000009E0000-0x0000000000A82000-memory.dmp
memory/3712-110-0x00000000009E0000-0x0000000000A82000-memory.dmp
memory/4764-16-0x0000000000400000-0x00000000004BA000-memory.dmp
memory/4764-69-0x0000000000400000-0x00000000004BA000-memory.dmp