Analysis
- max time kernel
122s - max time network
127s - platform
windows11-21h2_x64 - resource
win11-20240426-en - resource tags
- submitted
09/06/2024, 02:03
General
- Target e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.exe
- Size 4.7MB
- Sample240609-cg2n8aca2w
- SHA256 e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b
Malware Config
Extracted
-
socks5systemz
-
bbwbokn.com
-
http://bbwbokn.com/search/?q=67e28dd83d5fa77a480faf1e7c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa4de8889b5e4fa9281ae978f171ea771795af8e05c645db22f31dfe339426fa12a466c553adb719a9577e55b8603e983a608ff819c9e793923e
-
http://bbwbokn.com/search/?q=67e28dd83d5fa77a480faf1e7c27d78406abdd88be4b12eab517aa5c96bd86e4928e4a96148ab2865b77f80ebad9c50f7cb63037ed2ab423a4344383ba915d911ec07bb606a0708727e40ea678c751bbe34efb0e2807e12571c17f3e83fe16c1e89d9333cb6793
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\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.exe"C:\Users\Admin\AppData\Local\Temp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.exe"1⤵
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\is-GIRTC.tmp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.tmp"C:\Users\Admin\AppData\Local\Temp\is-GIRTC.tmp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.tmp" /SL5="$4023C,4666921,54272,C:\Users\Admin\AppData\Local\Temp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.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
_iscrypt.dll
e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.tmp
memory/2004-59-0x0000000000400000-0x00000000006C4000-memory.dmp
memory/2004-60-0x0000000000400000-0x00000000006C4000-memory.dmp
memory/2004-65-0x0000000000400000-0x00000000006C4000-memory.dmp
memory/2004-64-0x0000000000400000-0x00000000006C4000-memory.dmp
memory/2948-70-0x0000000000400000-0x0000000000414000-memory.dmp
memory/2948-2-0x0000000000401000-0x000000000040B000-memory.dmp
memory/2948-0-0x0000000000400000-0x0000000000414000-memory.dmp
memory/3364-10-0x0000000000400000-0x00000000004BA000-memory.dmp
memory/3364-71-0x0000000000400000-0x00000000004BA000-memory.dmp
memory/3900-76-0x0000000000400000-0x00000000006C4000-memory.dmp
memory/3900-87-0x0000000002800000-0x00000000028A2000-memory.dmp
memory/3900-72-0x0000000000400000-0x00000000006C4000-memory.dmp
memory/3900-75-0x0000000000400000-0x00000000006C4000-memory.dmp
memory/3900-68-0x0000000000400000-0x00000000006C4000-memory.dmp
memory/3900-79-0x0000000000400000-0x00000000006C4000-memory.dmp
memory/3900-82-0x0000000000400000-0x00000000006C4000-memory.dmp
memory/3900-85-0x0000000000400000-0x00000000006C4000-memory.dmp
memory/3900-91-0x0000000000400000-0x00000000006C4000-memory.dmp
memory/3900-69-0x0000000000400000-0x00000000006C4000-memory.dmp
memory/3900-96-0x0000000000400000-0x00000000006C4000-memory.dmp
memory/3900-99-0x0000000000400000-0x00000000006C4000-memory.dmp
memory/3900-102-0x0000000000400000-0x00000000006C4000-memory.dmp
memory/3900-105-0x0000000000400000-0x00000000006C4000-memory.dmp
memory/3900-108-0x0000000000400000-0x00000000006C4000-memory.dmp
memory/3900-111-0x0000000000400000-0x00000000006C4000-memory.dmp
memory/3900-113-0x0000000002800000-0x00000000028A2000-memory.dmp
memory/3900-112-0x0000000002800000-0x00000000028A2000-memory.dmp
memory/3900-117-0x0000000000400000-0x00000000006C4000-memory.dmp
memory/3900-120-0x0000000000400000-0x00000000006C4000-memory.dmp