Analysis
- max time kernel
293s - max time network
260s - platform
windows10-1703_x64 - resource
win10-20240404-en - resource tags
- submitted
13/06/2024, 23:22
General
- Target 71f4601b51274cfd5dfee83da432a679e48f51dd762b4d8bfc6a19a502c6a2f3.exe
- Size 4.8MB
- Sample240613-3c151ayemm
- SHA256 71f4601b51274cfd5dfee83da432a679e48f51dd762b4d8bfc6a19a502c6a2f3
Malware Config
Extracted
-
socks5systemz
-
bedbdcb.com
-
http://bedbdcb.com/search/?q=67e28dd8685af379125bfd4e7c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa49e8889b5e4fa9281ae978f271ea771795af8e05c645db22f31dfe339426fa11a366c350adb719a9577e55b8603e983a608ff712c2ee959e38
Signatures
- Detect Socks5Systemz Payload 1 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\71f4601b51274cfd5dfee83da432a679e48f51dd762b4d8bfc6a19a502c6a2f3.exe"C:\Users\Admin\AppData\Local\Temp\71f4601b51274cfd5dfee83da432a679e48f51dd762b4d8bfc6a19a502c6a2f3.exe"1⤵
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\is-BE0FI.tmp\71f4601b51274cfd5dfee83da432a679e48f51dd762b4d8bfc6a19a502c6a2f3.tmp"C:\Users\Admin\AppData\Local\Temp\is-BE0FI.tmp\71f4601b51274cfd5dfee83da432a679e48f51dd762b4d8bfc6a19a502c6a2f3.tmp" /SL5="$50220,4787431,54272,C:\Users\Admin\AppData\Local\Temp\71f4601b51274cfd5dfee83da432a679e48f51dd762b4d8bfc6a19a502c6a2f3.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent.exe"C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent.exe" -i3⤵
- Executes dropped EXE
-
-
C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent.exe"C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent.exe" -s3⤵
- Executes dropped EXE
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
lesserextent.exe
71f4601b51274cfd5dfee83da432a679e48f51dd762b4d8bfc6a19a502c6a2f3.tmp
_iscrypt.dll
memory/2680-59-0x0000000000400000-0x0000000000717000-memory.dmp
memory/2680-60-0x0000000000400000-0x0000000000717000-memory.dmp
memory/2680-63-0x0000000000400000-0x0000000000717000-memory.dmp
memory/3104-0-0x0000000000400000-0x0000000000414000-memory.dmp
memory/3104-2-0x0000000000401000-0x000000000040B000-memory.dmp
memory/3104-66-0x0000000000400000-0x0000000000414000-memory.dmp
memory/3672-10-0x0000000000400000-0x00000000004BA000-memory.dmp
memory/3672-67-0x0000000000400000-0x00000000004BA000-memory.dmp
memory/4408-77-0x0000000000400000-0x0000000000717000-memory.dmp
memory/4408-96-0x0000000000400000-0x0000000000717000-memory.dmp
memory/4408-74-0x0000000000400000-0x0000000000717000-memory.dmp
memory/4408-68-0x0000000000400000-0x0000000000717000-memory.dmp
memory/4408-80-0x0000000000400000-0x0000000000717000-memory.dmp
memory/4408-83-0x0000000000A50000-0x0000000000AF2000-memory.dmp
memory/4408-85-0x0000000000400000-0x0000000000717000-memory.dmp
memory/4408-90-0x0000000000400000-0x0000000000717000-memory.dmp
memory/4408-93-0x0000000000400000-0x0000000000717000-memory.dmp
memory/4408-71-0x0000000000400000-0x0000000000717000-memory.dmp
memory/4408-99-0x0000000000400000-0x0000000000717000-memory.dmp
memory/4408-102-0x0000000000400000-0x0000000000717000-memory.dmp
memory/4408-105-0x0000000000400000-0x0000000000717000-memory.dmp
memory/4408-109-0x0000000000400000-0x0000000000717000-memory.dmp
memory/4408-112-0x0000000000400000-0x0000000000717000-memory.dmp
memory/4408-115-0x0000000000400000-0x0000000000717000-memory.dmp
memory/4408-118-0x0000000000400000-0x0000000000717000-memory.dmp
memory/4408-121-0x0000000000400000-0x0000000000717000-memory.dmp
memory/4408-124-0x0000000000400000-0x0000000000717000-memory.dmp
memory/4408-129-0x0000000000400000-0x0000000000717000-memory.dmp