Malware Analysis Report

2025-08-11 07:23

Sample ID 240803-at1xcawhmk
Target 54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926
SHA256 54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926
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

54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926

Threat Level: Known bad

The file 54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926 was found to be: Known bad.

Malicious Activity Summary

socks5systemz botnet discovery

Detect Socks5Systemz Payload

Socks5Systemz

Executes dropped EXE

Loads dropped DLL

Unexpected DNS network traffic destination

Checks installed software on the system

Unsigned PE

System Location Discovery: System Language Discovery

Suspicious use of FindShellTrayWindow

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-03 00:31

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-03 00:31

Reported

2024-08-03 00:33

Platform

win10v2004-20240802-en

Max time kernel

143s

Max time network

128s

Command Line

"C:\Users\Admin\AppData\Local\Temp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.exe"

Signatures

Detect Socks5Systemz Payload

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
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\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\is-46BIS.tmp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.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-46BIS.tmp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.tmp N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1224 wrote to memory of 1468 N/A C:\Users\Admin\AppData\Local\Temp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.exe C:\Users\Admin\AppData\Local\Temp\is-46BIS.tmp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.tmp
PID 1224 wrote to memory of 1468 N/A C:\Users\Admin\AppData\Local\Temp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.exe C:\Users\Admin\AppData\Local\Temp\is-46BIS.tmp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.tmp
PID 1224 wrote to memory of 1468 N/A C:\Users\Admin\AppData\Local\Temp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.exe C:\Users\Admin\AppData\Local\Temp\is-46BIS.tmp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.tmp
PID 1468 wrote to memory of 1028 N/A C:\Users\Admin\AppData\Local\Temp\is-46BIS.tmp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.tmp C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe
PID 1468 wrote to memory of 1028 N/A C:\Users\Admin\AppData\Local\Temp\is-46BIS.tmp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.tmp C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe
PID 1468 wrote to memory of 1028 N/A C:\Users\Admin\AppData\Local\Temp\is-46BIS.tmp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.tmp C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe
PID 1468 wrote to memory of 640 N/A C:\Users\Admin\AppData\Local\Temp\is-46BIS.tmp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.tmp C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe
PID 1468 wrote to memory of 640 N/A C:\Users\Admin\AppData\Local\Temp\is-46BIS.tmp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.tmp C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe
PID 1468 wrote to memory of 640 N/A C:\Users\Admin\AppData\Local\Temp\is-46BIS.tmp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.tmp C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe

Processes

C:\Users\Admin\AppData\Local\Temp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.exe

"C:\Users\Admin\AppData\Local\Temp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.exe"

C:\Users\Admin\AppData\Local\Temp\is-46BIS.tmp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.tmp

"C:\Users\Admin\AppData\Local\Temp\is-46BIS.tmp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.tmp" /SL5="$7005A,3980347,54272,C:\Users\Admin\AppData\Local\Temp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.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 g.bing.com udp
US 13.107.21.237:443 g.bing.com tcp
US 8.8.8.8:53 140.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 237.21.107.13.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 25.140.123.92.in-addr.arpa udp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp
HK 141.98.234.31:53 eznnwmi.ua udp
CH 185.196.8.214:80 eznnwmi.ua tcp
NL 45.156.23.96:2023 tcp
US 8.8.8.8:53 214.8.196.185.in-addr.arpa udp
US 8.8.8.8:53 31.234.98.141.in-addr.arpa udp
US 8.8.8.8:53 96.23.156.45.in-addr.arpa udp

Files

memory/1224-0-0x0000000000400000-0x0000000000414000-memory.dmp

memory/1224-2-0x0000000000401000-0x000000000040B000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\is-46BIS.tmp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.tmp

MD5 849bb5c3439284a175f581ec281ca92e
SHA1 8bd0737eac1a74de4d62d66911ca7ed9f61cbc0f
SHA256 33a8f60e50240aecdbedc45922032025376ecccc0c1acbd44c82f12985e82206
SHA512 ac7bd629b6ed2595c6af4ef0737d7d801c8c35ebb4638ec2c19569511157a1543a6fa91d1a15708810865ece1cfb27367480754a7debf716d322d1eb59c5f625

memory/1468-13-0x0000000000400000-0x00000000004BD000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\is-V7K1M.tmp\_isetup\_iscrypt.dll

MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

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

MD5 7b8d8edb2ea6f085c3f7fd8f205d1977
SHA1 39d411ef00df5ba7795796f06b6971961d1e9220
SHA256 3b045b1123c3ae4c103217f218f1f218a21ed7e0a118616d8374738c970c31cf
SHA512 42b235b2b9ec77be8d47414b8cd69e51c264bfaa88258be3a14e98eab17c0e18217a07816f706b0a7cf82f0a77fc58507c75e8470054dbe3cc085a2e39a9ce84

memory/1028-51-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/1028-53-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/1028-57-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/1028-56-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/640-59-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/1224-61-0x0000000000400000-0x0000000000414000-memory.dmp

memory/1468-62-0x0000000000400000-0x00000000004BD000-memory.dmp

memory/640-63-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/640-66-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/640-69-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/640-72-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/640-75-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/640-78-0x0000000000CA0000-0x0000000000D42000-memory.dmp

memory/640-80-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/640-85-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/640-88-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/640-91-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/640-94-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/640-97-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/640-100-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/640-101-0x0000000000CA0000-0x0000000000D42000-memory.dmp

memory/640-102-0x0000000000CA0000-0x0000000000D42000-memory.dmp

memory/640-106-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/640-109-0x0000000000400000-0x00000000008B2000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-03 00:31

Reported

2024-08-03 00:33

Platform

win11-20240802-en

Max time kernel

147s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.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 91.211.247.248 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\is-46BIS.tmp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.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
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\is-46BIS.tmp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.tmp N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 976 wrote to memory of 4744 N/A C:\Users\Admin\AppData\Local\Temp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.exe C:\Users\Admin\AppData\Local\Temp\is-46BIS.tmp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.tmp
PID 976 wrote to memory of 4744 N/A C:\Users\Admin\AppData\Local\Temp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.exe C:\Users\Admin\AppData\Local\Temp\is-46BIS.tmp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.tmp
PID 976 wrote to memory of 4744 N/A C:\Users\Admin\AppData\Local\Temp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.exe C:\Users\Admin\AppData\Local\Temp\is-46BIS.tmp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.tmp
PID 4744 wrote to memory of 1092 N/A C:\Users\Admin\AppData\Local\Temp\is-46BIS.tmp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.tmp C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe
PID 4744 wrote to memory of 1092 N/A C:\Users\Admin\AppData\Local\Temp\is-46BIS.tmp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.tmp C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe
PID 4744 wrote to memory of 1092 N/A C:\Users\Admin\AppData\Local\Temp\is-46BIS.tmp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.tmp C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe
PID 4744 wrote to memory of 2884 N/A C:\Users\Admin\AppData\Local\Temp\is-46BIS.tmp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.tmp C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe
PID 4744 wrote to memory of 2884 N/A C:\Users\Admin\AppData\Local\Temp\is-46BIS.tmp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.tmp C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe
PID 4744 wrote to memory of 2884 N/A C:\Users\Admin\AppData\Local\Temp\is-46BIS.tmp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.tmp C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe

Processes

C:\Users\Admin\AppData\Local\Temp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.exe

"C:\Users\Admin\AppData\Local\Temp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.exe"

C:\Users\Admin\AppData\Local\Temp\is-46BIS.tmp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.tmp

"C:\Users\Admin\AppData\Local\Temp\is-46BIS.tmp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.tmp" /SL5="$6005C,3980347,54272,C:\Users\Admin\AppData\Local\Temp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.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 71.159.190.20.in-addr.arpa udp
LT 91.211.247.248:53 bhngwru.com udp
CH 185.196.8.214:80 bhngwru.com tcp

Files

memory/976-1-0x0000000000400000-0x0000000000414000-memory.dmp

memory/976-2-0x0000000000401000-0x000000000040B000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\is-46BIS.tmp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.tmp

MD5 849bb5c3439284a175f581ec281ca92e
SHA1 8bd0737eac1a74de4d62d66911ca7ed9f61cbc0f
SHA256 33a8f60e50240aecdbedc45922032025376ecccc0c1acbd44c82f12985e82206
SHA512 ac7bd629b6ed2595c6af4ef0737d7d801c8c35ebb4638ec2c19569511157a1543a6fa91d1a15708810865ece1cfb27367480754a7debf716d322d1eb59c5f625

memory/4744-12-0x0000000000400000-0x00000000004BD000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\is-1MVQ9.tmp\_isetup\_iscrypt.dll

MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

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

MD5 7b8d8edb2ea6f085c3f7fd8f205d1977
SHA1 39d411ef00df5ba7795796f06b6971961d1e9220
SHA256 3b045b1123c3ae4c103217f218f1f218a21ed7e0a118616d8374738c970c31cf
SHA512 42b235b2b9ec77be8d47414b8cd69e51c264bfaa88258be3a14e98eab17c0e18217a07816f706b0a7cf82f0a77fc58507c75e8470054dbe3cc085a2e39a9ce84

memory/1092-53-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/1092-52-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/1092-56-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/1092-57-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/2884-60-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/2884-61-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/976-62-0x0000000000400000-0x0000000000414000-memory.dmp

memory/4744-63-0x0000000000400000-0x00000000004BD000-memory.dmp

memory/2884-64-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/1092-67-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/2884-68-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/2884-69-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/2884-72-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/2884-75-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/2884-78-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/2884-81-0x0000000000C60000-0x0000000000D02000-memory.dmp

memory/2884-84-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/2884-89-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/2884-92-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/2884-95-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/2884-98-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/2884-101-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/2884-104-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/2884-108-0x0000000000400000-0x00000000008B2000-memory.dmp

memory/2884-111-0x0000000000400000-0x00000000008B2000-memory.dmp