Malware Analysis Report

2025-08-10 13:49

Sample ID 240804-lyq4gsxamc
Target 6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2
SHA256 6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2
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

6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2

Threat Level: Known bad

The file 6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2 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

Unsigned PE

System Location Discovery: System Language Discovery

Suspicious behavior: EnumeratesProcesses

Suspicious use of FindShellTrayWindow

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-04 09:56

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-04 09:56

Reported

2024-08-04 09:59

Platform

win10v2004-20240802-en

Max time kernel

142s

Max time network

135s

Command Line

"C:\Users\Admin\AppData\Local\Temp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.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 45.155.250.90 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\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\is-ARTR0.tmp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.tmp N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Combiner Free\combinerfree.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Combiner Free\combinerfree.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\is-ARTR0.tmp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.tmp N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 212 wrote to memory of 2628 N/A C:\Users\Admin\AppData\Local\Temp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.exe C:\Users\Admin\AppData\Local\Temp\is-ARTR0.tmp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.tmp
PID 212 wrote to memory of 2628 N/A C:\Users\Admin\AppData\Local\Temp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.exe C:\Users\Admin\AppData\Local\Temp\is-ARTR0.tmp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.tmp
PID 212 wrote to memory of 2628 N/A C:\Users\Admin\AppData\Local\Temp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.exe C:\Users\Admin\AppData\Local\Temp\is-ARTR0.tmp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.tmp
PID 2628 wrote to memory of 872 N/A C:\Users\Admin\AppData\Local\Temp\is-ARTR0.tmp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.tmp C:\Users\Admin\AppData\Local\Combiner Free\combinerfree.exe
PID 2628 wrote to memory of 872 N/A C:\Users\Admin\AppData\Local\Temp\is-ARTR0.tmp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.tmp C:\Users\Admin\AppData\Local\Combiner Free\combinerfree.exe
PID 2628 wrote to memory of 872 N/A C:\Users\Admin\AppData\Local\Temp\is-ARTR0.tmp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.tmp C:\Users\Admin\AppData\Local\Combiner Free\combinerfree.exe
PID 2628 wrote to memory of 1672 N/A C:\Users\Admin\AppData\Local\Temp\is-ARTR0.tmp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.tmp C:\Users\Admin\AppData\Local\Combiner Free\combinerfree.exe
PID 2628 wrote to memory of 1672 N/A C:\Users\Admin\AppData\Local\Temp\is-ARTR0.tmp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.tmp C:\Users\Admin\AppData\Local\Combiner Free\combinerfree.exe
PID 2628 wrote to memory of 1672 N/A C:\Users\Admin\AppData\Local\Temp\is-ARTR0.tmp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.tmp C:\Users\Admin\AppData\Local\Combiner Free\combinerfree.exe

Processes

C:\Users\Admin\AppData\Local\Temp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.exe

"C:\Users\Admin\AppData\Local\Temp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.exe"

C:\Users\Admin\AppData\Local\Temp\is-ARTR0.tmp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.tmp

"C:\Users\Admin\AppData\Local\Temp\is-ARTR0.tmp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.tmp" /SL5="$12004C,3498625,54272,C:\Users\Admin\AppData\Local\Temp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.exe"

C:\Users\Admin\AppData\Local\Combiner Free\combinerfree.exe

"C:\Users\Admin\AppData\Local\Combiner Free\combinerfree.exe" -i

C:\Users\Admin\AppData\Local\Combiner Free\combinerfree.exe

"C:\Users\Admin\AppData\Local\Combiner Free\combinerfree.exe" -s

Network

Country Destination Domain Proto
US 8.8.8.8:53 68.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp
SE 45.155.250.90:53 bdzhuok.com udp
CH 185.196.8.214:80 bdzhuok.com 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 90.250.155.45.in-addr.arpa udp
US 8.8.8.8:53 96.23.156.45.in-addr.arpa udp

Files

memory/212-1-0x0000000000400000-0x0000000000414000-memory.dmp

memory/212-2-0x0000000000401000-0x000000000040B000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\is-ARTR0.tmp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.tmp

MD5 57cadefd8d9a7bec777ab1e7a1329b43
SHA1 a9e5bf8cc5456e109a9d6356988f7ff8a9da299f
SHA256 241a3f9c3a0e0e477eb0b67acabaf0911d6a44bcbeefb001de35b5427ff3dacc
SHA512 850893c27ea24d9c1891dc7556ea3bb0f517b559fa80079f5e3b583ba7b2ba8c7c20f52afcf56d844829ca852222638f0f1f6452ac8f94b36356e938dcfe0306

memory/2628-10-0x0000000000400000-0x00000000004BD000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\is-MMU60.tmp\_isetup\_iscrypt.dll

MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

C:\Users\Admin\AppData\Local\Combiner Free\combinerfree.exe

MD5 b024f70ea23c885dbfb9d7fbe1f63337
SHA1 6f6ccfbc40f7c6decb61efa127bf15c85cda762d
SHA256 fde113cf30161b4d9b53d83abe4e257eda0ceb7c6881da32bae924123641849b
SHA512 4c5ebdc95174230c27f0bcaa9b21b061db99fc475721aabc909ceadb6d57453f3d586ccc3731feae248da7d167a497f95193ff66bace1cb8b775d8f13e7bcce8

memory/872-52-0x0000000000400000-0x00000000006D4000-memory.dmp

memory/872-54-0x0000000000400000-0x00000000006D4000-memory.dmp

memory/872-53-0x0000000000400000-0x00000000006D4000-memory.dmp

memory/872-57-0x0000000000400000-0x00000000006D4000-memory.dmp

memory/212-60-0x0000000000400000-0x0000000000414000-memory.dmp

memory/2628-61-0x0000000000400000-0x00000000004BD000-memory.dmp

memory/1672-62-0x0000000000400000-0x00000000006D4000-memory.dmp

memory/1672-65-0x0000000000400000-0x00000000006D4000-memory.dmp

memory/1672-68-0x0000000000400000-0x00000000006D4000-memory.dmp

memory/1672-71-0x0000000000400000-0x00000000006D4000-memory.dmp

memory/1672-74-0x0000000000400000-0x00000000006D4000-memory.dmp

memory/1672-76-0x0000000000940000-0x00000000009E2000-memory.dmp

memory/1672-79-0x0000000000400000-0x00000000006D4000-memory.dmp

memory/1672-84-0x0000000000400000-0x00000000006D4000-memory.dmp

memory/1672-87-0x0000000000400000-0x00000000006D4000-memory.dmp

memory/1672-90-0x0000000000400000-0x00000000006D4000-memory.dmp

memory/1672-93-0x0000000000400000-0x00000000006D4000-memory.dmp

memory/1672-96-0x0000000000400000-0x00000000006D4000-memory.dmp

memory/1672-99-0x0000000000400000-0x00000000006D4000-memory.dmp

memory/1672-100-0x0000000000940000-0x00000000009E2000-memory.dmp

memory/1672-101-0x0000000000940000-0x00000000009E2000-memory.dmp

memory/1672-104-0x0000000000400000-0x00000000006D4000-memory.dmp

memory/1672-108-0x0000000000400000-0x00000000006D4000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-04 09:56

Reported

2024-08-04 09:59

Platform

win11-20240802-en

Max time kernel

141s

Max time network

130s

Command Line

"C:\Users\Admin\AppData\Local\Temp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.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\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\is-PH4UL.tmp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.tmp N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Combiner Free\combinerfree.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Combiner Free\combinerfree.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\is-PH4UL.tmp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.tmp N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 760 wrote to memory of 3112 N/A C:\Users\Admin\AppData\Local\Temp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.exe C:\Users\Admin\AppData\Local\Temp\is-PH4UL.tmp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.tmp
PID 760 wrote to memory of 3112 N/A C:\Users\Admin\AppData\Local\Temp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.exe C:\Users\Admin\AppData\Local\Temp\is-PH4UL.tmp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.tmp
PID 760 wrote to memory of 3112 N/A C:\Users\Admin\AppData\Local\Temp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.exe C:\Users\Admin\AppData\Local\Temp\is-PH4UL.tmp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.tmp
PID 3112 wrote to memory of 3548 N/A C:\Users\Admin\AppData\Local\Temp\is-PH4UL.tmp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.tmp C:\Users\Admin\AppData\Local\Combiner Free\combinerfree.exe
PID 3112 wrote to memory of 3548 N/A C:\Users\Admin\AppData\Local\Temp\is-PH4UL.tmp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.tmp C:\Users\Admin\AppData\Local\Combiner Free\combinerfree.exe
PID 3112 wrote to memory of 3548 N/A C:\Users\Admin\AppData\Local\Temp\is-PH4UL.tmp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.tmp C:\Users\Admin\AppData\Local\Combiner Free\combinerfree.exe
PID 3112 wrote to memory of 2296 N/A C:\Users\Admin\AppData\Local\Temp\is-PH4UL.tmp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.tmp C:\Users\Admin\AppData\Local\Combiner Free\combinerfree.exe
PID 3112 wrote to memory of 2296 N/A C:\Users\Admin\AppData\Local\Temp\is-PH4UL.tmp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.tmp C:\Users\Admin\AppData\Local\Combiner Free\combinerfree.exe
PID 3112 wrote to memory of 2296 N/A C:\Users\Admin\AppData\Local\Temp\is-PH4UL.tmp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.tmp C:\Users\Admin\AppData\Local\Combiner Free\combinerfree.exe

Processes

C:\Users\Admin\AppData\Local\Temp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.exe

"C:\Users\Admin\AppData\Local\Temp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.exe"

C:\Users\Admin\AppData\Local\Temp\is-PH4UL.tmp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.tmp

"C:\Users\Admin\AppData\Local\Temp\is-PH4UL.tmp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.tmp" /SL5="$3017A,3498625,54272,C:\Users\Admin\AppData\Local\Temp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.exe"

C:\Users\Admin\AppData\Local\Combiner Free\combinerfree.exe

"C:\Users\Admin\AppData\Local\Combiner Free\combinerfree.exe" -i

C:\Users\Admin\AppData\Local\Combiner Free\combinerfree.exe

"C:\Users\Admin\AppData\Local\Combiner Free\combinerfree.exe" -s

Network

Country Destination Domain Proto
HK 141.98.234.31:53 aynoggo.ru udp
US 8.8.8.8:53 31.234.98.141.in-addr.arpa udp
CH 185.196.8.214:80 aynoggo.ru tcp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 214.8.196.185.in-addr.arpa udp
NL 89.105.201.183:2023 tcp

Files

memory/760-0-0x0000000000400000-0x0000000000414000-memory.dmp

memory/760-2-0x0000000000401000-0x000000000040B000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\is-PH4UL.tmp\6751bebfe1f1454332d3bee1b7e9946f5720ddf4608cc4233c5b18916ea74cc2.tmp

MD5 57cadefd8d9a7bec777ab1e7a1329b43
SHA1 a9e5bf8cc5456e109a9d6356988f7ff8a9da299f
SHA256 241a3f9c3a0e0e477eb0b67acabaf0911d6a44bcbeefb001de35b5427ff3dacc
SHA512 850893c27ea24d9c1891dc7556ea3bb0f517b559fa80079f5e3b583ba7b2ba8c7c20f52afcf56d844829ca852222638f0f1f6452ac8f94b36356e938dcfe0306

memory/3112-10-0x0000000000400000-0x00000000004BD000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\is-LA15L.tmp\_isetup\_iscrypt.dll

MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

C:\Users\Admin\AppData\Local\Combiner Free\combinerfree.exe

MD5 b024f70ea23c885dbfb9d7fbe1f63337
SHA1 6f6ccfbc40f7c6decb61efa127bf15c85cda762d
SHA256 fde113cf30161b4d9b53d83abe4e257eda0ceb7c6881da32bae924123641849b
SHA512 4c5ebdc95174230c27f0bcaa9b21b061db99fc475721aabc909ceadb6d57453f3d586ccc3731feae248da7d167a497f95193ff66bace1cb8b775d8f13e7bcce8

memory/3548-52-0x0000000000400000-0x00000000006D4000-memory.dmp

memory/3548-53-0x0000000000400000-0x00000000006D4000-memory.dmp

memory/3548-55-0x0000000000400000-0x00000000006D4000-memory.dmp

memory/3548-57-0x0000000000400000-0x00000000006D4000-memory.dmp

memory/2296-60-0x0000000000400000-0x00000000006D4000-memory.dmp

memory/760-61-0x0000000000400000-0x0000000000414000-memory.dmp

memory/3112-62-0x0000000000400000-0x00000000004BD000-memory.dmp

memory/2296-63-0x0000000000400000-0x00000000006D4000-memory.dmp

memory/2296-66-0x0000000000400000-0x00000000006D4000-memory.dmp

memory/2296-67-0x0000000000400000-0x00000000006D4000-memory.dmp

memory/2296-70-0x0000000000400000-0x00000000006D4000-memory.dmp

memory/2296-73-0x0000000000400000-0x00000000006D4000-memory.dmp

memory/2296-76-0x0000000000400000-0x00000000006D4000-memory.dmp

memory/2296-78-0x00000000023D0000-0x0000000002472000-memory.dmp

memory/2296-82-0x0000000000400000-0x00000000006D4000-memory.dmp

memory/2296-87-0x0000000000400000-0x00000000006D4000-memory.dmp

memory/2296-90-0x0000000000400000-0x00000000006D4000-memory.dmp

memory/2296-93-0x0000000000400000-0x00000000006D4000-memory.dmp

memory/2296-96-0x0000000000400000-0x00000000006D4000-memory.dmp

memory/2296-99-0x0000000000400000-0x00000000006D4000-memory.dmp

memory/2296-102-0x0000000000400000-0x00000000006D4000-memory.dmp

memory/2296-103-0x00000000023D0000-0x0000000002472000-memory.dmp

memory/2296-104-0x00000000023D0000-0x0000000002472000-memory.dmp

memory/2296-108-0x0000000000400000-0x00000000006D4000-memory.dmp

memory/2296-111-0x0000000000400000-0x00000000006D4000-memory.dmp