Malware Analysis Report

2025-08-11 07:23

Sample ID 240802-y2yzqatdjd
Target 09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf
SHA256 09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf
Tags
socks5systemz botnet discovery
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf

Threat Level: Known bad

The file 09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf was found to be: Known bad.

Malicious Activity Summary

socks5systemz botnet discovery

Detect Socks5Systemz Payload

Socks5Systemz

Unexpected DNS network traffic destination

Executes dropped EXE

Loads dropped DLL

Checks installed software on the system

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of FindShellTrayWindow

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-02 20:17

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-02 20:17

Reported

2024-08-02 20:20

Platform

win10v2004-20240802-en

Max time kernel

150s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.exe"

Signatures

Detect Socks5Systemz Payload

Description Indicator Process Target
N/A N/A N/A N/A

Socks5Systemz

botnet socks5systemz

Unexpected DNS network traffic destination

Description Indicator Process Target
Destination IP 141.98.234.31 N/A N/A

Checks installed software on the system

discovery

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\is-EVQGJ.tmp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.tmp N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\is-EVQGJ.tmp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.tmp N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2596 wrote to memory of 3240 N/A C:\Users\Admin\AppData\Local\Temp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.exe C:\Users\Admin\AppData\Local\Temp\is-EVQGJ.tmp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.tmp
PID 2596 wrote to memory of 3240 N/A C:\Users\Admin\AppData\Local\Temp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.exe C:\Users\Admin\AppData\Local\Temp\is-EVQGJ.tmp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.tmp
PID 2596 wrote to memory of 3240 N/A C:\Users\Admin\AppData\Local\Temp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.exe C:\Users\Admin\AppData\Local\Temp\is-EVQGJ.tmp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.tmp
PID 3240 wrote to memory of 208 N/A C:\Users\Admin\AppData\Local\Temp\is-EVQGJ.tmp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.tmp C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe
PID 3240 wrote to memory of 208 N/A C:\Users\Admin\AppData\Local\Temp\is-EVQGJ.tmp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.tmp C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe
PID 3240 wrote to memory of 208 N/A C:\Users\Admin\AppData\Local\Temp\is-EVQGJ.tmp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.tmp C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe
PID 3240 wrote to memory of 1832 N/A C:\Users\Admin\AppData\Local\Temp\is-EVQGJ.tmp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.tmp C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe
PID 3240 wrote to memory of 1832 N/A C:\Users\Admin\AppData\Local\Temp\is-EVQGJ.tmp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.tmp C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe
PID 3240 wrote to memory of 1832 N/A C:\Users\Admin\AppData\Local\Temp\is-EVQGJ.tmp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.tmp C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe

Processes

C:\Users\Admin\AppData\Local\Temp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.exe

"C:\Users\Admin\AppData\Local\Temp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.exe"

C:\Users\Admin\AppData\Local\Temp\is-EVQGJ.tmp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.tmp

"C:\Users\Admin\AppData\Local\Temp\is-EVQGJ.tmp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.tmp" /SL5="$60280,3740494,54272,C:\Users\Admin\AppData\Local\Temp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.exe"

C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe

"C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe" -i

C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe

"C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe" -s

Network

Country Destination Domain Proto
US 8.8.8.8:53 2.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 240.143.123.92.in-addr.arpa udp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp
HK 141.98.234.31:53 bwlyeqx.com udp
US 8.8.8.8:53 31.234.98.141.in-addr.arpa udp
CH 185.196.8.214:80 bwlyeqx.com tcp
US 8.8.8.8:53 214.8.196.185.in-addr.arpa udp
US 8.8.8.8:53 udp

Files

memory/2596-0-0x0000000000400000-0x0000000000414000-memory.dmp

memory/2596-2-0x0000000000401000-0x000000000040B000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\is-EVQGJ.tmp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.tmp

MD5 849bb5c3439284a175f581ec281ca92e
SHA1 8bd0737eac1a74de4d62d66911ca7ed9f61cbc0f
SHA256 33a8f60e50240aecdbedc45922032025376ecccc0c1acbd44c82f12985e82206
SHA512 ac7bd629b6ed2595c6af4ef0737d7d801c8c35ebb4638ec2c19569511157a1543a6fa91d1a15708810865ece1cfb27367480754a7debf716d322d1eb59c5f625

memory/3240-13-0x0000000000400000-0x00000000004BD000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\is-RQV3R.tmp\_isetup\_iscrypt.dll

MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe

MD5 1b6fc0635012a62a6e4f6516779adbc6
SHA1 918ea639a97f8f7550e6c6194db32349b5de7e47
SHA256 9694c12c072960399bb3ec9162f37398710aeda03e169972d6cd5166ecb71149
SHA512 7c65d5133c6b5778014b10d8c3184f3c3331e9a358d66d4dd52b18b4f50ee81cdd1e27623c933ffb1ef636f02aa197b6cee3625e89727b5fb5150bdd4f8fbd86

memory/208-52-0x0000000000400000-0x000000000087C000-memory.dmp

memory/208-53-0x0000000000400000-0x000000000087C000-memory.dmp

memory/208-55-0x0000000000400000-0x000000000087C000-memory.dmp

memory/208-57-0x0000000000400000-0x000000000087C000-memory.dmp

memory/1832-60-0x0000000000400000-0x000000000087C000-memory.dmp

memory/2596-61-0x0000000000400000-0x0000000000414000-memory.dmp

memory/3240-62-0x0000000000400000-0x00000000004BD000-memory.dmp

memory/1832-63-0x0000000000400000-0x000000000087C000-memory.dmp

memory/1832-66-0x0000000000400000-0x000000000087C000-memory.dmp

memory/1832-69-0x0000000000400000-0x000000000087C000-memory.dmp

memory/1832-72-0x0000000000400000-0x000000000087C000-memory.dmp

memory/1832-75-0x0000000000400000-0x000000000087C000-memory.dmp

memory/1832-78-0x00000000026E0000-0x0000000002782000-memory.dmp

memory/1832-80-0x0000000000400000-0x000000000087C000-memory.dmp

memory/1832-85-0x0000000000400000-0x000000000087C000-memory.dmp

memory/1832-88-0x0000000000400000-0x000000000087C000-memory.dmp

memory/1832-91-0x0000000000400000-0x000000000087C000-memory.dmp

memory/1832-94-0x0000000000400000-0x000000000087C000-memory.dmp

memory/1832-97-0x0000000000400000-0x000000000087C000-memory.dmp

memory/1832-100-0x0000000000400000-0x000000000087C000-memory.dmp

memory/1832-104-0x0000000000400000-0x000000000087C000-memory.dmp

memory/1832-107-0x0000000000400000-0x000000000087C000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-02 20:17

Reported

2024-08-02 20:20

Platform

win11-20240802-en

Max time kernel

142s

Max time network

142s

Command Line

"C:\Users\Admin\AppData\Local\Temp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.exe"

Signatures

Detect Socks5Systemz Payload

Description Indicator Process Target
N/A N/A N/A N/A

Socks5Systemz

botnet socks5systemz

Unexpected DNS network traffic destination

Description Indicator Process Target
Destination IP 141.98.234.31 N/A N/A

Checks installed software on the system

discovery

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\is-FNE8P.tmp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.tmp N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\is-FNE8P.tmp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.tmp N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4820 wrote to memory of 4736 N/A C:\Users\Admin\AppData\Local\Temp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.exe C:\Users\Admin\AppData\Local\Temp\is-FNE8P.tmp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.tmp
PID 4820 wrote to memory of 4736 N/A C:\Users\Admin\AppData\Local\Temp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.exe C:\Users\Admin\AppData\Local\Temp\is-FNE8P.tmp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.tmp
PID 4820 wrote to memory of 4736 N/A C:\Users\Admin\AppData\Local\Temp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.exe C:\Users\Admin\AppData\Local\Temp\is-FNE8P.tmp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.tmp
PID 4736 wrote to memory of 2020 N/A C:\Users\Admin\AppData\Local\Temp\is-FNE8P.tmp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.tmp C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe
PID 4736 wrote to memory of 2020 N/A C:\Users\Admin\AppData\Local\Temp\is-FNE8P.tmp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.tmp C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe
PID 4736 wrote to memory of 2020 N/A C:\Users\Admin\AppData\Local\Temp\is-FNE8P.tmp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.tmp C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe
PID 4736 wrote to memory of 2288 N/A C:\Users\Admin\AppData\Local\Temp\is-FNE8P.tmp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.tmp C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe
PID 4736 wrote to memory of 2288 N/A C:\Users\Admin\AppData\Local\Temp\is-FNE8P.tmp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.tmp C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe
PID 4736 wrote to memory of 2288 N/A C:\Users\Admin\AppData\Local\Temp\is-FNE8P.tmp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.tmp C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe

Processes

C:\Users\Admin\AppData\Local\Temp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.exe

"C:\Users\Admin\AppData\Local\Temp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.exe"

C:\Users\Admin\AppData\Local\Temp\is-FNE8P.tmp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.tmp

"C:\Users\Admin\AppData\Local\Temp\is-FNE8P.tmp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.tmp" /SL5="$802D0,3740494,54272,C:\Users\Admin\AppData\Local\Temp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.exe"

C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe

"C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe" -i

C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe

"C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe" -s

Network

Country Destination Domain Proto
US 20.189.173.2:443 tcp
HK 141.98.234.31:53 erizwqi.ua udp
CH 185.196.8.214:80 erizwqi.ua tcp

Files

memory/4820-0-0x0000000000400000-0x0000000000414000-memory.dmp

memory/4820-2-0x0000000000401000-0x000000000040B000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\is-FNE8P.tmp\09898f95032e451238e4936a95cc2b8797418478e558dd4bae1da566ba751bcf.tmp

MD5 849bb5c3439284a175f581ec281ca92e
SHA1 8bd0737eac1a74de4d62d66911ca7ed9f61cbc0f
SHA256 33a8f60e50240aecdbedc45922032025376ecccc0c1acbd44c82f12985e82206
SHA512 ac7bd629b6ed2595c6af4ef0737d7d801c8c35ebb4638ec2c19569511157a1543a6fa91d1a15708810865ece1cfb27367480754a7debf716d322d1eb59c5f625

memory/4736-7-0x0000000000400000-0x00000000004BD000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\is-CC6FV.tmp\_isetup\_iscrypt.dll

MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe

MD5 1b6fc0635012a62a6e4f6516779adbc6
SHA1 918ea639a97f8f7550e6c6194db32349b5de7e47
SHA256 9694c12c072960399bb3ec9162f37398710aeda03e169972d6cd5166ecb71149
SHA512 7c65d5133c6b5778014b10d8c3184f3c3331e9a358d66d4dd52b18b4f50ee81cdd1e27623c933ffb1ef636f02aa197b6cee3625e89727b5fb5150bdd4f8fbd86

memory/2020-53-0x0000000000400000-0x000000000087C000-memory.dmp

memory/2020-52-0x0000000000400000-0x000000000087C000-memory.dmp

memory/2020-55-0x0000000000400000-0x000000000087C000-memory.dmp

memory/2020-56-0x0000000000400000-0x000000000087C000-memory.dmp

memory/2288-58-0x0000000000400000-0x000000000087C000-memory.dmp

memory/2288-60-0x0000000000400000-0x000000000087C000-memory.dmp

memory/4820-61-0x0000000000400000-0x0000000000414000-memory.dmp

memory/4736-62-0x0000000000400000-0x00000000004BD000-memory.dmp

memory/2288-63-0x0000000000400000-0x000000000087C000-memory.dmp

memory/2288-66-0x0000000000400000-0x000000000087C000-memory.dmp

memory/2288-67-0x0000000000400000-0x000000000087C000-memory.dmp

memory/2288-70-0x0000000000400000-0x000000000087C000-memory.dmp

memory/2288-73-0x0000000000400000-0x000000000087C000-memory.dmp

memory/2288-76-0x0000000000400000-0x000000000087C000-memory.dmp

memory/2288-79-0x0000000000BA0000-0x0000000000C42000-memory.dmp

memory/2288-81-0x0000000000400000-0x000000000087C000-memory.dmp

memory/2288-87-0x0000000000400000-0x000000000087C000-memory.dmp

memory/2288-90-0x0000000000400000-0x000000000087C000-memory.dmp

memory/2288-93-0x0000000000400000-0x000000000087C000-memory.dmp

memory/2288-96-0x0000000000400000-0x000000000087C000-memory.dmp

memory/2288-99-0x0000000000400000-0x000000000087C000-memory.dmp

memory/2288-102-0x0000000000400000-0x000000000087C000-memory.dmp

memory/2288-106-0x0000000000400000-0x000000000087C000-memory.dmp

memory/2288-109-0x0000000000400000-0x000000000087C000-memory.dmp