Analysis
-
max time kernel
293s -
max time network
299s -
platform
windows10-1703_x64 -
resource
win10-20240404-en -
resource tags
arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system -
submitted
14-06-2024 00:12
Static task
static1
Behavioral task
behavioral1
Sample
fa3c9b491697abc525df5ce0086cc8ada6ad3c36a9ce51e7570011d2b8140c94.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
fa3c9b491697abc525df5ce0086cc8ada6ad3c36a9ce51e7570011d2b8140c94.exe
Resource
win10-20240404-en
General
-
Target
fa3c9b491697abc525df5ce0086cc8ada6ad3c36a9ce51e7570011d2b8140c94.exe
-
Size
4.6MB
-
MD5
07d160c10509d0857fd9dbd8442e46cb
-
SHA1
921f90d7516821880a84146983220910d9fc8205
-
SHA256
fa3c9b491697abc525df5ce0086cc8ada6ad3c36a9ce51e7570011d2b8140c94
-
SHA512
f14cc0603c7ee9e8a3069121a8910618078b04c68090a91f71ee81c0593fd3d566eab4122904b92a0d818ebd88341050a8f2234d95029a8b50e7524804a0b0ce
-
SSDEEP
98304:mKKu/56DlW1uwHXNF5nGUQmviODRfmrM8MEvlnK+LI6HuybFtipw:eleuwHXN7GUfvdV8Ml8lnKKRMw
Malware Config
Extracted
socks5systemz
bhiistu.com
http://bhiistu.com/search/?q=67e28dd8645fa72f495daa1c7c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa4de8889b5e4fa9281ae978a771ea771795af8e05c645db22f31dfe339426fa11a366c350adb719a9577e55b8603e983a608ff712c2eb959839
Signatures
-
Detect Socks5Systemz Payload 1 IoCs
Processes:
resource yara_rule behavioral2/memory/2940-83-0x0000000002510000-0x00000000025B2000-memory.dmp family_socks5systemz -
Socks5Systemz
Socks5Systemz is a botnet written in C++.
-
Executes dropped EXE 3 IoCs
Processes:
fa3c9b491697abc525df5ce0086cc8ada6ad3c36a9ce51e7570011d2b8140c94.tmplesserextent.exelesserextent.exepid process 4996 fa3c9b491697abc525df5ce0086cc8ada6ad3c36a9ce51e7570011d2b8140c94.tmp 3476 lesserextent.exe 2940 lesserextent.exe -
Loads dropped DLL 1 IoCs
Processes:
fa3c9b491697abc525df5ce0086cc8ada6ad3c36a9ce51e7570011d2b8140c94.tmppid process 4996 fa3c9b491697abc525df5ce0086cc8ada6ad3c36a9ce51e7570011d2b8140c94.tmp -
Unexpected DNS network traffic destination 1 IoCs
Network traffic to other servers than the configured DNS servers was detected on the DNS port.
Processes:
description ioc Destination IP 141.98.234.31 -
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
Processes:
fa3c9b491697abc525df5ce0086cc8ada6ad3c36a9ce51e7570011d2b8140c94.tmppid process 4996 fa3c9b491697abc525df5ce0086cc8ada6ad3c36a9ce51e7570011d2b8140c94.tmp -
Suspicious use of WriteProcessMemory 9 IoCs
Processes:
fa3c9b491697abc525df5ce0086cc8ada6ad3c36a9ce51e7570011d2b8140c94.exefa3c9b491697abc525df5ce0086cc8ada6ad3c36a9ce51e7570011d2b8140c94.tmpdescription pid process target process PID 2428 wrote to memory of 4996 2428 fa3c9b491697abc525df5ce0086cc8ada6ad3c36a9ce51e7570011d2b8140c94.exe fa3c9b491697abc525df5ce0086cc8ada6ad3c36a9ce51e7570011d2b8140c94.tmp PID 2428 wrote to memory of 4996 2428 fa3c9b491697abc525df5ce0086cc8ada6ad3c36a9ce51e7570011d2b8140c94.exe fa3c9b491697abc525df5ce0086cc8ada6ad3c36a9ce51e7570011d2b8140c94.tmp PID 2428 wrote to memory of 4996 2428 fa3c9b491697abc525df5ce0086cc8ada6ad3c36a9ce51e7570011d2b8140c94.exe fa3c9b491697abc525df5ce0086cc8ada6ad3c36a9ce51e7570011d2b8140c94.tmp PID 4996 wrote to memory of 3476 4996 fa3c9b491697abc525df5ce0086cc8ada6ad3c36a9ce51e7570011d2b8140c94.tmp lesserextent.exe PID 4996 wrote to memory of 3476 4996 fa3c9b491697abc525df5ce0086cc8ada6ad3c36a9ce51e7570011d2b8140c94.tmp lesserextent.exe PID 4996 wrote to memory of 3476 4996 fa3c9b491697abc525df5ce0086cc8ada6ad3c36a9ce51e7570011d2b8140c94.tmp lesserextent.exe PID 4996 wrote to memory of 2940 4996 fa3c9b491697abc525df5ce0086cc8ada6ad3c36a9ce51e7570011d2b8140c94.tmp lesserextent.exe PID 4996 wrote to memory of 2940 4996 fa3c9b491697abc525df5ce0086cc8ada6ad3c36a9ce51e7570011d2b8140c94.tmp lesserextent.exe PID 4996 wrote to memory of 2940 4996 fa3c9b491697abc525df5ce0086cc8ada6ad3c36a9ce51e7570011d2b8140c94.tmp lesserextent.exe
Processes
-
C:\Users\Admin\AppData\Local\Temp\fa3c9b491697abc525df5ce0086cc8ada6ad3c36a9ce51e7570011d2b8140c94.exe"C:\Users\Admin\AppData\Local\Temp\fa3c9b491697abc525df5ce0086cc8ada6ad3c36a9ce51e7570011d2b8140c94.exe"1⤵
- Suspicious use of WriteProcessMemory
PID:2428 -
C:\Users\Admin\AppData\Local\Temp\is-57JJ2.tmp\fa3c9b491697abc525df5ce0086cc8ada6ad3c36a9ce51e7570011d2b8140c94.tmp"C:\Users\Admin\AppData\Local\Temp\is-57JJ2.tmp\fa3c9b491697abc525df5ce0086cc8ada6ad3c36a9ce51e7570011d2b8140c94.tmp" /SL5="$501FC,4604216,54272,C:\Users\Admin\AppData\Local\Temp\fa3c9b491697abc525df5ce0086cc8ada6ad3c36a9ce51e7570011d2b8140c94.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:4996 -
C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent.exe"C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent.exe" -i3⤵
- Executes dropped EXE
PID:3476 -
C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent.exe"C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent.exe" -s3⤵
- Executes dropped EXE
PID:2940
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
-
C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent.exeFilesize
2.9MB
MD5ef6a40723e3b1f875321abf06ca68ac8
SHA153a7f3d4ae7a2b92d45d00035976d82da9e358a1
SHA2566c08ed0c0cf22702b59f5dcb21e085d0f0abec9d3be739d59d115d7333270012
SHA5123e5420590b09b4bece53fce0ff46452ad19de96129bf7922710f6ce036bac6367e69491b1418dca984232e6d27aa00e5dfdd1ee9947e84604a0e9c0185ad6ece
-
C:\Users\Admin\AppData\Local\Temp\is-57JJ2.tmp\fa3c9b491697abc525df5ce0086cc8ada6ad3c36a9ce51e7570011d2b8140c94.tmpFilesize
680KB
MD52e97fdffc91d2e4bd0f019d914d45d2e
SHA1c1f73313c67ae35c06af50550f8ec72210b1efd5
SHA2569cfabcb9cceb11708e60821bf405d0884cc91eebf9b393962c83caa6f541e15f
SHA5121a2bc77e185cc73ed8677da219d82bf5849933791ea6f677bb09a866ea54bd7c24fe9d17cef18efe9707ed700783d6629bc995d0004a05c0a24388d0af0062bf
-
\Users\Admin\AppData\Local\Temp\is-H2JU2.tmp\_isetup\_iscrypt.dllFilesize
2KB
MD5a69559718ab506675e907fe49deb71e9
SHA1bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA2562f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
-
memory/2428-66-0x0000000000400000-0x0000000000414000-memory.dmpFilesize
80KB
-
memory/2428-3-0x0000000000401000-0x000000000040B000-memory.dmpFilesize
40KB
-
memory/2428-0-0x0000000000400000-0x0000000000414000-memory.dmpFilesize
80KB
-
memory/2940-99-0x0000000000400000-0x00000000006E5000-memory.dmpFilesize
2.9MB
-
memory/2940-93-0x0000000000400000-0x00000000006E5000-memory.dmpFilesize
2.9MB
-
memory/2940-129-0x0000000000400000-0x00000000006E5000-memory.dmpFilesize
2.9MB
-
memory/2940-124-0x0000000000400000-0x00000000006E5000-memory.dmpFilesize
2.9MB
-
memory/2940-121-0x0000000000400000-0x00000000006E5000-memory.dmpFilesize
2.9MB
-
memory/2940-68-0x0000000000400000-0x00000000006E5000-memory.dmpFilesize
2.9MB
-
memory/2940-71-0x0000000000400000-0x00000000006E5000-memory.dmpFilesize
2.9MB
-
memory/2940-74-0x0000000000400000-0x00000000006E5000-memory.dmpFilesize
2.9MB
-
memory/2940-77-0x0000000000400000-0x00000000006E5000-memory.dmpFilesize
2.9MB
-
memory/2940-80-0x0000000000400000-0x00000000006E5000-memory.dmpFilesize
2.9MB
-
memory/2940-83-0x0000000002510000-0x00000000025B2000-memory.dmpFilesize
648KB
-
memory/2940-85-0x0000000000400000-0x00000000006E5000-memory.dmpFilesize
2.9MB
-
memory/2940-90-0x0000000000400000-0x00000000006E5000-memory.dmpFilesize
2.9MB
-
memory/2940-118-0x0000000000400000-0x00000000006E5000-memory.dmpFilesize
2.9MB
-
memory/2940-96-0x0000000000400000-0x00000000006E5000-memory.dmpFilesize
2.9MB
-
memory/2940-115-0x0000000000400000-0x00000000006E5000-memory.dmpFilesize
2.9MB
-
memory/2940-102-0x0000000000400000-0x00000000006E5000-memory.dmpFilesize
2.9MB
-
memory/2940-105-0x0000000000400000-0x00000000006E5000-memory.dmpFilesize
2.9MB
-
memory/2940-109-0x0000000000400000-0x00000000006E5000-memory.dmpFilesize
2.9MB
-
memory/2940-112-0x0000000000400000-0x00000000006E5000-memory.dmpFilesize
2.9MB
-
memory/3476-60-0x0000000000400000-0x00000000006E5000-memory.dmpFilesize
2.9MB
-
memory/3476-59-0x0000000000400000-0x00000000006E5000-memory.dmpFilesize
2.9MB
-
memory/3476-63-0x0000000000400000-0x00000000006E5000-memory.dmpFilesize
2.9MB
-
memory/4996-13-0x0000000000400000-0x00000000004BA000-memory.dmpFilesize
744KB
-
memory/4996-67-0x0000000000400000-0x00000000004BA000-memory.dmpFilesize
744KB