Analysis
- max time kernel
144s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20231215-en - resource tags
- submitted
25/01/2024, 08:34
General
- Target file.exe
- Size 4.1MB
- Sample240125-kgetfscgck
- SHA256 8fcf30ff8fd0c41ad012ab2e069b57ccf9c47ac52e3da7c515d78ceb15b23a3b
Malware Config
Signatures
- Detect Socks5Systemz Payload 3 IoCs
- Socks5Systemz
Socks5Systemz is a botnet written in C++.
- Executes dropped EXE 3 IoCs
- Loads dropped DLL 3 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.
- Suspicious use of WriteProcessMemory 9 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\is-AVQ9K.tmp\file.tmp"C:\Users\Admin\AppData\Local\Temp\is-AVQ9K.tmp\file.tmp" /SL5="$70206,4075391,54272,C:\Users\Admin\AppData\Local\Temp\file.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Express Burn Software\expressburn.exe"C:\Users\Admin\AppData\Local\Express Burn Software\expressburn.exe" -i3⤵
- Executes dropped EXE
-
-
C:\Users\Admin\AppData\Local\Express Burn Software\expressburn.exe"C:\Users\Admin\AppData\Local\Express Burn Software\expressburn.exe" -s3⤵
- Executes dropped EXE
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-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
expressburn.exe
expressburn.exe
expressburn.exe
_iscrypt.dll
_isdecmp.dll
file.tmp
memory/1356-0-0x0000000000400000-0x0000000000414000-memory.dmp
memory/1356-68-0x0000000000400000-0x0000000000414000-memory.dmp
memory/2200-88-0x0000000000C90000-0x0000000000D32000-memory.dmp
memory/2200-98-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2200-118-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2200-115-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2200-66-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2200-67-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2200-111-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2200-108-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2200-70-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2200-105-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2200-74-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2200-75-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2200-78-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2200-81-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2200-84-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2200-87-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2200-102-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2200-89-0x0000000000C90000-0x0000000000D32000-memory.dmp
memory/2200-95-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2200-99-0x0000000000C90000-0x0000000000D32000-memory.dmp
memory/2348-63-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2348-59-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2348-60-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2348-62-0x0000000000400000-0x000000000097A000-memory.dmp
memory/3360-9-0x0000000002100000-0x0000000002101000-memory.dmp
memory/3360-71-0x0000000002100000-0x0000000002101000-memory.dmp
memory/3360-69-0x0000000000400000-0x00000000004BD000-memory.dmp