Analysis
- max time kernel
141s - max time network
134s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
09/06/2024, 09:08
General
- Target 3ac649efec98618189a42456ee70029e75c7fcbafc1ccee4e2cd54c8be0f5ce9.exe
- Size 4.8MB
- Sample240609-k3xldshc25
- SHA256 3ac649efec98618189a42456ee70029e75c7fcbafc1ccee4e2cd54c8be0f5ce9
Malware Config
Extracted
-
socks5systemz
-
bhmgbdj.com
-
http://bhmgbdj.com/search/?q=67e28dd86b5bf57b435daf497c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa49e8889b5e4fa9281ae978f271ea771795af8e05c645db22f31dfe339426fa11af66c152adb719a9577e55b8603e983a608ff818c2eb949c38
Signatures
- Detect Socks5Systemz Payload 1 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\3ac649efec98618189a42456ee70029e75c7fcbafc1ccee4e2cd54c8be0f5ce9.exe"C:\Users\Admin\AppData\Local\Temp\3ac649efec98618189a42456ee70029e75c7fcbafc1ccee4e2cd54c8be0f5ce9.exe"1⤵
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\is-F3FT5.tmp\3ac649efec98618189a42456ee70029e75c7fcbafc1ccee4e2cd54c8be0f5ce9.tmp"C:\Users\Admin\AppData\Local\Temp\is-F3FT5.tmp\3ac649efec98618189a42456ee70029e75c7fcbafc1ccee4e2cd54c8be0f5ce9.tmp" /SL5="$6011C,4779927,54272,C:\Users\Admin\AppData\Local\Temp\3ac649efec98618189a42456ee70029e75c7fcbafc1ccee4e2cd54c8be0f5ce9.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
Loading Replay Monitor...
Downloads
lesserextent.exe
lesserextent.exe
3ac649efec98618189a42456ee70029e75c7fcbafc1ccee4e2cd54c8be0f5ce9.tmp
_iscrypt.dll
memory/792-64-0x0000000000400000-0x0000000000714000-memory.dmp
memory/792-59-0x0000000000400000-0x0000000000714000-memory.dmp
memory/792-60-0x0000000000400000-0x0000000000714000-memory.dmp
memory/792-65-0x0000000000400000-0x0000000000714000-memory.dmp
memory/1128-70-0x0000000000400000-0x0000000000414000-memory.dmp
memory/1128-0-0x0000000000400000-0x0000000000414000-memory.dmp
memory/1128-2-0x0000000000401000-0x000000000040B000-memory.dmp
memory/1816-82-0x0000000000400000-0x0000000000714000-memory.dmp
memory/1816-85-0x0000000000400000-0x0000000000714000-memory.dmp
memory/1816-118-0x0000000000400000-0x0000000000714000-memory.dmp
memory/1816-69-0x0000000000400000-0x0000000000714000-memory.dmp
memory/1816-72-0x0000000000400000-0x0000000000714000-memory.dmp
memory/1816-74-0x0000000000400000-0x0000000000714000-memory.dmp
memory/1816-76-0x0000000000400000-0x0000000000714000-memory.dmp
memory/1816-79-0x0000000000400000-0x0000000000714000-memory.dmp
memory/1816-68-0x0000000000400000-0x0000000000714000-memory.dmp
memory/1816-115-0x0000000000400000-0x0000000000714000-memory.dmp
memory/1816-86-0x0000000000A30000-0x0000000000AD2000-memory.dmp
memory/1816-90-0x0000000000400000-0x0000000000714000-memory.dmp
memory/1816-96-0x0000000000400000-0x0000000000714000-memory.dmp
memory/1816-99-0x0000000000400000-0x0000000000714000-memory.dmp
memory/1816-102-0x0000000000400000-0x0000000000714000-memory.dmp
memory/1816-105-0x0000000000400000-0x0000000000714000-memory.dmp
memory/1816-108-0x0000000000400000-0x0000000000714000-memory.dmp
memory/1816-111-0x0000000000400000-0x0000000000714000-memory.dmp
memory/4492-8-0x0000000000400000-0x00000000004BA000-memory.dmp
memory/4492-71-0x0000000000400000-0x00000000004BA000-memory.dmp