Malware Analysis Report

2025-08-05 23:58

Sample ID 240324-stjbeagb9s
Target 28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140
SHA256 28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140
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

28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140

Threat Level: Known bad

The file 28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140 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

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-03-24 15:24

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-24 15:24

Reported

2024-03-24 15:27

Platform

win10v2004-20240226-en

Max time kernel

150s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.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

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

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2608 wrote to memory of 1552 N/A C:\Users\Admin\AppData\Local\Temp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.exe C:\Users\Admin\AppData\Local\Temp\is-GA3KS.tmp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.tmp
PID 2608 wrote to memory of 1552 N/A C:\Users\Admin\AppData\Local\Temp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.exe C:\Users\Admin\AppData\Local\Temp\is-GA3KS.tmp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.tmp
PID 2608 wrote to memory of 1552 N/A C:\Users\Admin\AppData\Local\Temp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.exe C:\Users\Admin\AppData\Local\Temp\is-GA3KS.tmp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.tmp
PID 1552 wrote to memory of 4212 N/A C:\Users\Admin\AppData\Local\Temp\is-GA3KS.tmp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.tmp C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe
PID 1552 wrote to memory of 4212 N/A C:\Users\Admin\AppData\Local\Temp\is-GA3KS.tmp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.tmp C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe
PID 1552 wrote to memory of 4212 N/A C:\Users\Admin\AppData\Local\Temp\is-GA3KS.tmp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.tmp C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe
PID 1552 wrote to memory of 1628 N/A C:\Users\Admin\AppData\Local\Temp\is-GA3KS.tmp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.tmp C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe
PID 1552 wrote to memory of 1628 N/A C:\Users\Admin\AppData\Local\Temp\is-GA3KS.tmp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.tmp C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe
PID 1552 wrote to memory of 1628 N/A C:\Users\Admin\AppData\Local\Temp\is-GA3KS.tmp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.tmp C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe

Processes

C:\Users\Admin\AppData\Local\Temp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.exe

"C:\Users\Admin\AppData\Local\Temp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.exe"

C:\Users\Admin\AppData\Local\Temp\is-GA3KS.tmp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.tmp

"C:\Users\Admin\AppData\Local\Temp\is-GA3KS.tmp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.tmp" /SL5="$E0204,1771305,54272,C:\Users\Admin\AppData\Local\Temp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.exe"

C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe

"C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe" -i

C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe

"C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe" -s

Network

Country Destination Domain Proto
US 8.8.8.8:53 45.179.17.96.in-addr.arpa udp
US 8.8.8.8:53 136.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
GB 96.16.110.114:80 tcp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 81.179.17.96.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp
SE 45.155.250.90:53 ccuroie.net udp
MD 45.142.214.240:80 ccuroie.net tcp
US 8.8.8.8:53 90.250.155.45.in-addr.arpa udp
US 8.8.8.8:53 240.214.142.45.in-addr.arpa udp
US 8.8.8.8:53 208.143.182.52.in-addr.arpa udp

Files

memory/2608-0-0x0000000000400000-0x0000000000414000-memory.dmp

memory/2608-2-0x0000000000400000-0x0000000000414000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\is-GA3KS.tmp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.tmp

MD5 5a1e3d46cb5a24f8e50b2a59d2ba1cf3
SHA1 fe86894c4757c144449bc744649b7fb9e03346f1
SHA256 d3a2c2ce7d70b3b9c30faf3f72bf4ebcdea8f331d6b6cac5dae906327997985d
SHA512 a27dc5c443abb31826b14e514aa717be5bf0f548b82170f79705f45ca28abaedc485c5b8738044735f61eca9e1f0ca659b519a3947551404085d07202ae709af

memory/1552-7-0x0000000002340000-0x0000000002341000-memory.dmp

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

MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe

MD5 9aa9c990c1d39b7d5a1bbfac8a1f9ea3
SHA1 217b23164048a1f7829eb22848714ad882aa30f2
SHA256 cae9f259144d1371674648a8b6606b542148e9a5cc500f878a02ef0fa59b8a3e
SHA512 28a98115017732b326a09464f8ff2f5daf397bc15a577a7d9b9d90c5ba282bc14425afda8f5fd09efe4ce6851769471f1c9c84f04d2d2095619bb24f8c2e4458

memory/4212-38-0x0000000000400000-0x0000000000601000-memory.dmp

memory/4212-39-0x0000000000400000-0x0000000000601000-memory.dmp

C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe

MD5 3db31a79eff39a3922bda26da31b35d1
SHA1 5ec073c576b8ac8de5468b55f0bfa9149ffe7170
SHA256 b9e72f200b637f30b81a9f1fe017a08719221718cf31dfa427bc52866b013f09
SHA512 cdfd53529fd41b43ebd2d404397b07f687ebd3352326039a6c67b99a25d098634db0e3adc103b29e53d972472f0aa538c4970c34e67118eb680936601cb86425

memory/4212-42-0x0000000000400000-0x0000000000601000-memory.dmp

C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe

MD5 8d24844c66fe5aeb5cbc548e44819939
SHA1 5371282a11740e4cf26d63095f56cb3f1af955c1
SHA256 0514c5baa7dbbd29091b57bf7601d6503191884d25e82694935d7c3bec06e59e
SHA512 0b68c5da9c30d80cb82af51559f840bcb6aa4d6c875ae9de92127e1525488595bdd56f455eef28c714c05ef0d711605d434ca277bdecaa3e47c7aeae503d722a

memory/1628-44-0x0000000000400000-0x0000000000601000-memory.dmp

memory/1628-46-0x0000000000400000-0x0000000000601000-memory.dmp

memory/2608-47-0x0000000000400000-0x0000000000414000-memory.dmp

memory/1552-48-0x0000000000400000-0x00000000004B8000-memory.dmp

memory/1628-49-0x0000000000400000-0x0000000000601000-memory.dmp

memory/1552-50-0x0000000002340000-0x0000000002341000-memory.dmp

memory/1628-53-0x0000000000400000-0x0000000000601000-memory.dmp

memory/1628-54-0x0000000000400000-0x0000000000601000-memory.dmp

memory/1628-57-0x0000000000400000-0x0000000000601000-memory.dmp

memory/1628-60-0x0000000000400000-0x0000000000601000-memory.dmp

memory/1628-63-0x0000000000400000-0x0000000000601000-memory.dmp

memory/1628-66-0x0000000000400000-0x0000000000601000-memory.dmp

memory/1628-67-0x00000000008B0000-0x0000000000952000-memory.dmp

memory/1628-73-0x0000000000400000-0x0000000000601000-memory.dmp

memory/1628-76-0x0000000000400000-0x0000000000601000-memory.dmp

memory/1628-77-0x00000000008B0000-0x0000000000952000-memory.dmp

memory/1628-80-0x0000000000400000-0x0000000000601000-memory.dmp

memory/1628-83-0x0000000000400000-0x0000000000601000-memory.dmp

memory/1628-86-0x0000000000400000-0x0000000000601000-memory.dmp

memory/1628-89-0x0000000000400000-0x0000000000601000-memory.dmp

memory/1628-93-0x0000000000400000-0x0000000000601000-memory.dmp

memory/1628-96-0x0000000000400000-0x0000000000601000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-24 15:24

Reported

2024-03-24 15:27

Platform

win11-20240221-en

Max time kernel

148s

Max time network

154s

Command Line

"C:\Users\Admin\AppData\Local\Temp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.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

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2576 wrote to memory of 4472 N/A C:\Users\Admin\AppData\Local\Temp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.exe C:\Users\Admin\AppData\Local\Temp\is-3OJPT.tmp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.tmp
PID 2576 wrote to memory of 4472 N/A C:\Users\Admin\AppData\Local\Temp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.exe C:\Users\Admin\AppData\Local\Temp\is-3OJPT.tmp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.tmp
PID 2576 wrote to memory of 4472 N/A C:\Users\Admin\AppData\Local\Temp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.exe C:\Users\Admin\AppData\Local\Temp\is-3OJPT.tmp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.tmp
PID 4472 wrote to memory of 2956 N/A C:\Users\Admin\AppData\Local\Temp\is-3OJPT.tmp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.tmp C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe
PID 4472 wrote to memory of 2956 N/A C:\Users\Admin\AppData\Local\Temp\is-3OJPT.tmp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.tmp C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe
PID 4472 wrote to memory of 2956 N/A C:\Users\Admin\AppData\Local\Temp\is-3OJPT.tmp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.tmp C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe
PID 4472 wrote to memory of 2408 N/A C:\Users\Admin\AppData\Local\Temp\is-3OJPT.tmp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.tmp C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe
PID 4472 wrote to memory of 2408 N/A C:\Users\Admin\AppData\Local\Temp\is-3OJPT.tmp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.tmp C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe
PID 4472 wrote to memory of 2408 N/A C:\Users\Admin\AppData\Local\Temp\is-3OJPT.tmp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.tmp C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe

Processes

C:\Users\Admin\AppData\Local\Temp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.exe

"C:\Users\Admin\AppData\Local\Temp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.exe"

C:\Users\Admin\AppData\Local\Temp\is-3OJPT.tmp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.tmp

"C:\Users\Admin\AppData\Local\Temp\is-3OJPT.tmp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.tmp" /SL5="$9006A,1771305,54272,C:\Users\Admin\AppData\Local\Temp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.exe"

C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe

"C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe" -i

C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe

"C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe" -s

Network

Country Destination Domain Proto
HK 141.98.234.31:53 bfiscke.com udp
MD 45.142.214.240:80 bfiscke.com tcp

Files

memory/2576-0-0x0000000000400000-0x0000000000414000-memory.dmp

memory/2576-2-0x0000000000400000-0x0000000000414000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\is-3OJPT.tmp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.tmp

MD5 5a1e3d46cb5a24f8e50b2a59d2ba1cf3
SHA1 fe86894c4757c144449bc744649b7fb9e03346f1
SHA256 d3a2c2ce7d70b3b9c30faf3f72bf4ebcdea8f331d6b6cac5dae906327997985d
SHA512 a27dc5c443abb31826b14e514aa717be5bf0f548b82170f79705f45ca28abaedc485c5b8738044735f61eca9e1f0ca659b519a3947551404085d07202ae709af

memory/4472-7-0x0000000002340000-0x0000000002341000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\is-SAGG4.tmp\_isetup\_iscrypt.dll

MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe

MD5 9aa9c990c1d39b7d5a1bbfac8a1f9ea3
SHA1 217b23164048a1f7829eb22848714ad882aa30f2
SHA256 cae9f259144d1371674648a8b6606b542148e9a5cc500f878a02ef0fa59b8a3e
SHA512 28a98115017732b326a09464f8ff2f5daf397bc15a577a7d9b9d90c5ba282bc14425afda8f5fd09efe4ce6851769471f1c9c84f04d2d2095619bb24f8c2e4458

memory/2956-38-0x0000000000400000-0x0000000000601000-memory.dmp

memory/2956-39-0x0000000000400000-0x0000000000601000-memory.dmp

memory/2956-43-0x0000000000400000-0x0000000000601000-memory.dmp

memory/2956-42-0x0000000000400000-0x0000000000601000-memory.dmp

memory/2408-46-0x0000000000400000-0x0000000000601000-memory.dmp

memory/2576-47-0x0000000000400000-0x0000000000414000-memory.dmp

memory/4472-48-0x0000000000400000-0x00000000004B8000-memory.dmp

memory/2408-49-0x0000000000400000-0x0000000000601000-memory.dmp

memory/4472-50-0x0000000002340000-0x0000000002341000-memory.dmp

memory/2408-53-0x0000000000400000-0x0000000000601000-memory.dmp

memory/2408-54-0x0000000000400000-0x0000000000601000-memory.dmp

memory/2408-57-0x0000000000400000-0x0000000000601000-memory.dmp

memory/2408-60-0x0000000000400000-0x0000000000601000-memory.dmp

memory/2408-63-0x0000000000400000-0x0000000000601000-memory.dmp

memory/2408-66-0x0000000000400000-0x0000000000601000-memory.dmp

memory/2408-68-0x00000000009A0000-0x0000000000A42000-memory.dmp

memory/2408-67-0x00000000009A0000-0x0000000000A42000-memory.dmp

memory/2408-74-0x0000000000400000-0x0000000000601000-memory.dmp

memory/2408-77-0x0000000000400000-0x0000000000601000-memory.dmp

memory/2408-78-0x00000000009A0000-0x0000000000A42000-memory.dmp

memory/2408-81-0x0000000000400000-0x0000000000601000-memory.dmp

memory/2408-84-0x0000000000400000-0x0000000000601000-memory.dmp

memory/2408-87-0x0000000000400000-0x0000000000601000-memory.dmp

memory/2408-90-0x0000000000400000-0x0000000000601000-memory.dmp

memory/2408-94-0x0000000000400000-0x0000000000601000-memory.dmp

memory/2408-97-0x0000000000400000-0x0000000000601000-memory.dmp