Analysis
- max time kernel
146s - max time network
150s - platform
windows11-21h2_x64 - resource
win11-20240508-en - resource tags
- submitted
08/06/2024, 16:25
General
- Target bf7fbe3502ef01e03f0fb5f81e472de4d73116f4be8f1a7d0818866522884c10.exe
- Size 4.6MB
- Sample240608-twydsaeb56
- SHA256 bf7fbe3502ef01e03f0fb5f81e472de4d73116f4be8f1a7d0818866522884c10
Malware Config
Extracted
-
socks5systemz
-
bomskup.com
-
http://bomskup.com/search/?q=67e28dd83f54f37a445aab4e7c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa4be8889b5e4fa9281ae978f671ea771795af8e05c645db22f31dfe339426fa12a466c553adb719a9577e55b8603e983a608ff819c6ec9c9d3b
-
http://bomskup.com/search/?q=67e28dd83f54f37a445aab4e7c27d78406abdd88be4b12eab517aa5c96bd86ea97844496148ab2865b77f80ebad9c30f7cb63037ed2ab423a4334383ba915d911ec07bb606a0708727e40ea678c751bbe34efb0e2807e12571c17f3e83fe16c1e89d9c38c46896
Signatures
- Detect Socks5Systemz Payload 3 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\bf7fbe3502ef01e03f0fb5f81e472de4d73116f4be8f1a7d0818866522884c10.exe"C:\Users\Admin\AppData\Local\Temp\bf7fbe3502ef01e03f0fb5f81e472de4d73116f4be8f1a7d0818866522884c10.exe"1⤵
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\is-3EQUK.tmp\bf7fbe3502ef01e03f0fb5f81e472de4d73116f4be8f1a7d0818866522884c10.tmp"C:\Users\Admin\AppData\Local\Temp\is-3EQUK.tmp\bf7fbe3502ef01e03f0fb5f81e472de4d73116f4be8f1a7d0818866522884c10.tmp" /SL5="$40232,4572499,54272,C:\Users\Admin\AppData\Local\Temp\bf7fbe3502ef01e03f0fb5f81e472de4d73116f4be8f1a7d0818866522884c10.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe"C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe" -i3⤵
- Executes dropped EXE
-
-
C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe"C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe" -s3⤵
- Executes dropped EXE
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
lesserextent32.exe
bf7fbe3502ef01e03f0fb5f81e472de4d73116f4be8f1a7d0818866522884c10.tmp
_iscrypt.dll
memory/784-95-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/784-78-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/784-119-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/784-115-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/784-112-0x00000000008D0000-0x0000000000972000-memory.dmp
memory/784-113-0x00000000008D0000-0x0000000000972000-memory.dmp
memory/784-66-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/784-68-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/784-110-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/784-107-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/784-71-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/784-74-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/784-75-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/784-104-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/784-81-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/784-84-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/784-87-0x00000000008D0000-0x0000000000972000-memory.dmp
memory/784-90-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/784-101-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/784-98-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/3360-0-0x0000000000400000-0x0000000000414000-memory.dmp
memory/3360-69-0x0000000000400000-0x0000000000414000-memory.dmp
memory/3360-3-0x0000000000401000-0x000000000040B000-memory.dmp
memory/3656-13-0x0000000000400000-0x00000000004BA000-memory.dmp
memory/3656-70-0x0000000000400000-0x00000000004BA000-memory.dmp
memory/4636-63-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/4636-62-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/4636-59-0x0000000000400000-0x00000000006C1000-memory.dmp