Analysis
- max time kernel
149s - max time network
139s - platform
windows7_x64 - resource
win7-20240221-en - resource tags
- submitted
08/06/2024, 08:51
General
- Target e983c404a021ca5f841ebcdd9bb2ea5d.exe
- Size 4.8MB
- Sample240608-kr54dsbe29
- SHA256 3ac649efec98618189a42456ee70029e75c7fcbafc1ccee4e2cd54c8be0f5ce9
Malware Config
Extracted
-
socks5systemz
-
erohvov.ua
-
http://erohvov.ua/search/?q=67e28dd83d5fa62d1358fa4d7c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa4de8889b5e4fa9281ae978ff71ea771795af8e05c645db22f31df92d8b38e316a667d307eca743ec4c2b07b52966923a6086fc17c7eb95
Signatures
- Detect Socks5Systemz Payload 1 IoCs
- Socks5Systemz
Socks5Systemz is a botnet written in C++.
- Executes dropped EXE 3 IoCs
- Loads dropped DLL 5 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 15 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\e983c404a021ca5f841ebcdd9bb2ea5d.exe"C:\Users\Admin\AppData\Local\Temp\e983c404a021ca5f841ebcdd9bb2ea5d.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\is-516NK.tmp\e983c404a021ca5f841ebcdd9bb2ea5d.tmp"C:\Users\Admin\AppData\Local\Temp\is-516NK.tmp\e983c404a021ca5f841ebcdd9bb2ea5d.tmp" /SL5="$70124,4779927,54272,C:\Users\Admin\AppData\Local\Temp\e983c404a021ca5f841ebcdd9bb2ea5d.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
e983c404a021ca5f841ebcdd9bb2ea5d.tmp
_iscrypt.dll
_shfoldr.dll
memory/1252-72-0x0000000000400000-0x0000000000414000-memory.dmp
memory/1252-0-0x0000000000400000-0x0000000000414000-memory.dmp
memory/1252-2-0x0000000000401000-0x000000000040B000-memory.dmp
memory/1716-12-0x0000000000400000-0x00000000004BA000-memory.dmp
memory/1716-64-0x0000000003530000-0x0000000003844000-memory.dmp
memory/1716-74-0x0000000000400000-0x00000000004BA000-memory.dmp
memory/2640-97-0x0000000000400000-0x0000000000714000-memory.dmp
memory/2640-90-0x0000000000400000-0x0000000000714000-memory.dmp
memory/2640-119-0x0000000000400000-0x0000000000714000-memory.dmp
memory/2640-116-0x0000000000400000-0x0000000000714000-memory.dmp
memory/2640-75-0x0000000000400000-0x0000000000714000-memory.dmp
memory/2640-78-0x0000000000400000-0x0000000000714000-memory.dmp
memory/2640-81-0x0000000000400000-0x0000000000714000-memory.dmp
memory/2640-84-0x0000000000400000-0x0000000000714000-memory.dmp
memory/2640-87-0x0000000000400000-0x0000000000714000-memory.dmp
memory/2640-71-0x0000000000400000-0x0000000000714000-memory.dmp
memory/2640-93-0x00000000022D0000-0x0000000002372000-memory.dmp
memory/2640-112-0x0000000000400000-0x0000000000714000-memory.dmp
memory/2640-100-0x0000000000400000-0x0000000000714000-memory.dmp
memory/2640-103-0x0000000000400000-0x0000000000714000-memory.dmp
memory/2640-106-0x0000000000400000-0x0000000000714000-memory.dmp
memory/2640-109-0x0000000000400000-0x0000000000714000-memory.dmp
memory/3028-65-0x0000000000400000-0x0000000000714000-memory.dmp
memory/3028-66-0x0000000000400000-0x0000000000714000-memory.dmp
memory/3028-69-0x0000000000400000-0x0000000000714000-memory.dmp