Analysis
- max time kernel
144s - max time network
129s - platform
windows7_x64 - resource
win7-20231129-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 5 IoCs
- Socks5Systemz
Socks5Systemz is a botnet written in C++.
- Executes dropped EXE 3 IoCs
- Loads dropped DLL 6 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 15 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\is-81F7V.tmp\file.tmp"C:\Users\Admin\AppData\Local\Temp\is-81F7V.tmp\file.tmp" /SL5="$4001A,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
expressburn.exe
file.tmp
_iscrypt.dll
_isdecmp.dll
_shfoldr.dll
memory/2044-61-0x0000000003850000-0x0000000003DCA000-memory.dmp
memory/2044-76-0x0000000003850000-0x0000000003DCA000-memory.dmp
memory/2044-75-0x0000000000240000-0x0000000000241000-memory.dmp
memory/2044-16-0x0000000000240000-0x0000000000241000-memory.dmp
memory/2044-73-0x0000000000400000-0x00000000004BD000-memory.dmp
memory/2736-63-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2736-67-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2736-66-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2736-62-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2744-104-0x0000000002BF0000-0x0000000002C92000-memory.dmp
memory/2744-95-0x0000000002BF0000-0x0000000002C92000-memory.dmp
memory/2744-74-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2744-125-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2744-71-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2744-79-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2744-80-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2744-83-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2744-86-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2744-89-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2744-92-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2744-122-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2744-93-0x0000000002BF0000-0x0000000002C92000-memory.dmp
memory/2744-100-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2744-103-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2744-69-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2744-107-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2744-110-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2744-113-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2744-116-0x0000000000400000-0x000000000097A000-memory.dmp
memory/2744-117-0x0000000002BF0000-0x0000000002C92000-memory.dmp
memory/2744-118-0x0000000002BF0000-0x0000000002C92000-memory.dmp
memory/3040-72-0x0000000000400000-0x0000000000414000-memory.dmp
memory/3040-1-0x0000000000400000-0x0000000000414000-memory.dmp