Analysis
- max time kernel
150s - max time network
165s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
30/03/2024, 17:48
General
- Target 0d27d9acd1f0a0664f77f75b3d1080d40f8a04fdf1fcb2661a5778e184470814.exe
- Size 5.6MB
- Sample240330-wdr56aba21
- SHA256 0d27d9acd1f0a0664f77f75b3d1080d40f8a04fdf1fcb2661a5778e184470814
Malware Config
Extracted
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socks5systemz
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51.159.66.125
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217.23.6.51
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151.80.38.159
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217.23.9.168
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37.187.122.227
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rc4_key
heyfg645fdhwi
Signatures
- Detect Socks5Systemz Payload 2 IoCs
- Socks5Systemz
Socks5Systemz is a botnet written in C++.
- Executes dropped EXE 3 IoCs
- Loads dropped DLL 1 IoCs
- Unexpected DNS network traffic destination 3 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.
- Drops file in Program Files directory 34 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Runs net.exe
- Suspicious use of WriteProcessMemory 15 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\0d27d9acd1f0a0664f77f75b3d1080d40f8a04fdf1fcb2661a5778e184470814.exe"C:\Users\Admin\AppData\Local\Temp\0d27d9acd1f0a0664f77f75b3d1080d40f8a04fdf1fcb2661a5778e184470814.exe"1⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\is-VGJM1.tmp\is-6HELR.tmp"C:\Users\Admin\AppData\Local\Temp\is-VGJM1.tmp\is-6HELR.tmp" /SL4 $B005E "C:\Users\Admin\AppData\Local\Temp\0d27d9acd1f0a0664f77f75b3d1080d40f8a04fdf1fcb2661a5778e184470814.exe" 5597940 1418242⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\net.exe"C:\Windows\system32\net.exe" helpmsg 23⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\net1.exeC:\Windows\system32\net1 helpmsg 24⤵
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C:\Program Files (x86)\Smart Projects\IsoBuster\IsoBuster_1121.exe"C:\Program Files (x86)\Smart Projects\IsoBuster\IsoBuster_1121.exe" -i3⤵
- Executes dropped EXE
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C:\Program Files (x86)\Smart Projects\IsoBuster\IsoBuster_1121.exe"C:\Program Files (x86)\Smart Projects\IsoBuster\IsoBuster_1121.exe" -s3⤵
- Executes dropped EXE
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
IsoBuster_1121.exe
_iscrypt.dll
is-6HELR.tmp
memory/548-81-0x0000000000400000-0x000000000086F000-memory.dmp
memory/548-83-0x0000000000400000-0x000000000086F000-memory.dmp
memory/548-85-0x0000000000400000-0x000000000086F000-memory.dmp
memory/548-86-0x0000000000400000-0x000000000086F000-memory.dmp
memory/1988-90-0x0000000000400000-0x0000000000429000-memory.dmp
memory/1988-0-0x0000000000400000-0x0000000000429000-memory.dmp
memory/4512-96-0x0000000000400000-0x000000000086F000-memory.dmp
memory/4512-110-0x0000000000B70000-0x0000000000C14000-memory.dmp
memory/4512-136-0x0000000000400000-0x000000000086F000-memory.dmp
memory/4512-92-0x0000000000400000-0x000000000086F000-memory.dmp
memory/4512-133-0x0000000000400000-0x000000000086F000-memory.dmp
memory/4512-130-0x0000000000400000-0x000000000086F000-memory.dmp
memory/4512-97-0x0000000000400000-0x000000000086F000-memory.dmp
memory/4512-100-0x0000000000400000-0x000000000086F000-memory.dmp
memory/4512-103-0x0000000000400000-0x000000000086F000-memory.dmp
memory/4512-106-0x0000000000400000-0x000000000086F000-memory.dmp
memory/4512-109-0x0000000000400000-0x000000000086F000-memory.dmp
memory/4512-89-0x0000000000400000-0x000000000086F000-memory.dmp
memory/4512-114-0x0000000000400000-0x000000000086F000-memory.dmp
memory/4512-117-0x0000000000400000-0x000000000086F000-memory.dmp
memory/4512-118-0x0000000000B70000-0x0000000000C14000-memory.dmp
memory/4512-121-0x0000000000400000-0x000000000086F000-memory.dmp
memory/4512-124-0x0000000000400000-0x000000000086F000-memory.dmp
memory/4512-127-0x0000000000400000-0x000000000086F000-memory.dmp
memory/5048-6-0x00000000006B0000-0x00000000006B1000-memory.dmp
memory/5048-94-0x00000000006B0000-0x00000000006B1000-memory.dmp
memory/5048-91-0x0000000000400000-0x00000000004CF000-memory.dmp