Analysis
- max time kernel
141s - max time network
127s - platform
windows11-21h2_x64 - resource
win11-20240426-en - resource tags
- submitted
08/06/2024, 11:39
General
- Target 5e03218cbb4e731f88561108129c95982362a0b65f2dcf3d330256a0c0775260.exe
- Size 4.6MB
- Sample240608-nsj44abc4w
- SHA256 5e03218cbb4e731f88561108129c95982362a0b65f2dcf3d330256a0c0775260
Malware Config
Extracted
-
socks5systemz
-
bvrywcc.com
-
http://bvrywcc.com/search/?q=67e28dd86e5ea47c130bff1f7c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa4ee8889b5e4fa9281ae978a571ea771795af8e05c645db22f31dfe339426fa12a466c553adb719a9577e55b8603e983a608ff819c4e99d9933
-
http://bvrywcc.com/search/?q=67e28dd86e5ea47c130bff1f7c27d78406abdd88be4b12eab517aa5c96bd86ef968644855a8bbc896c58e713bc90c91b36b5281fc235a925ed3e06d6bd974a95129070b616e96cc92be510b866db51b9e34eed4c2b14a82966836f23d7f210c7ee92923fcb67951e
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\5e03218cbb4e731f88561108129c95982362a0b65f2dcf3d330256a0c0775260.exe"C:\Users\Admin\AppData\Local\Temp\5e03218cbb4e731f88561108129c95982362a0b65f2dcf3d330256a0c0775260.exe"1⤵
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\is-SNT4R.tmp\5e03218cbb4e731f88561108129c95982362a0b65f2dcf3d330256a0c0775260.tmp"C:\Users\Admin\AppData\Local\Temp\is-SNT4R.tmp\5e03218cbb4e731f88561108129c95982362a0b65f2dcf3d330256a0c0775260.tmp" /SL5="$4023E,4573483,54272,C:\Users\Admin\AppData\Local\Temp\5e03218cbb4e731f88561108129c95982362a0b65f2dcf3d330256a0c0775260.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
_iscrypt.dll
5e03218cbb4e731f88561108129c95982362a0b65f2dcf3d330256a0c0775260.tmp
memory/1580-60-0x0000000000400000-0x00000000006BF000-memory.dmp
memory/1580-65-0x0000000000400000-0x000000000047F000-memory.dmp
memory/1580-64-0x0000000000400000-0x00000000006BF000-memory.dmp
memory/1580-59-0x0000000000400000-0x00000000006BF000-memory.dmp
memory/1716-70-0x0000000000400000-0x0000000000414000-memory.dmp
memory/1716-3-0x0000000000401000-0x000000000040B000-memory.dmp
memory/1716-0-0x0000000000400000-0x0000000000414000-memory.dmp
memory/1844-76-0x0000000000400000-0x00000000006BF000-memory.dmp
memory/1844-108-0x0000000000400000-0x00000000006BF000-memory.dmp
memory/1844-68-0x0000000000400000-0x00000000006BF000-memory.dmp
memory/1844-120-0x0000000000400000-0x00000000006BF000-memory.dmp
memory/1844-72-0x0000000000400000-0x00000000006BF000-memory.dmp
memory/1844-75-0x0000000000400000-0x00000000006BF000-memory.dmp
memory/1844-117-0x0000000000400000-0x00000000006BF000-memory.dmp
memory/1844-79-0x0000000000400000-0x00000000006BF000-memory.dmp
memory/1844-82-0x0000000000400000-0x00000000006BF000-memory.dmp
memory/1844-85-0x0000000000400000-0x00000000006BF000-memory.dmp
memory/1844-88-0x0000000002520000-0x00000000025C2000-memory.dmp
memory/1844-90-0x0000000000400000-0x00000000006BF000-memory.dmp
memory/1844-96-0x0000000000400000-0x00000000006BF000-memory.dmp
memory/1844-99-0x0000000000400000-0x00000000006BF000-memory.dmp
memory/1844-102-0x0000000000400000-0x00000000006BF000-memory.dmp
memory/1844-105-0x0000000000400000-0x00000000006BF000-memory.dmp
memory/1844-69-0x0000000000400000-0x00000000006BF000-memory.dmp
memory/1844-111-0x0000000000400000-0x00000000006BF000-memory.dmp
memory/1844-112-0x0000000002520000-0x00000000025C2000-memory.dmp
memory/1844-113-0x0000000002520000-0x00000000025C2000-memory.dmp
memory/4824-10-0x0000000000400000-0x00000000004BA000-memory.dmp
memory/4824-71-0x0000000000400000-0x00000000004BA000-memory.dmp