Malware Analysis Report

2025-08-10 11:56

Sample ID 240323-rbjc1sba9t
Target 4fbc079afc0e59a9b99ef86981fa5326.exe
SHA256 ac9c83755d42aa96f1654229b594fa401113a79222b9deef71a1d4f18a5e8fc1
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

ac9c83755d42aa96f1654229b594fa401113a79222b9deef71a1d4f18a5e8fc1

Threat Level: Known bad

The file 4fbc079afc0e59a9b99ef86981fa5326.exe was found to be: Known bad.

Malicious Activity Summary

socks5systemz botnet discovery

Socks5Systemz

Detect Socks5Systemz Payload

Executes dropped EXE

Loads dropped DLL

Unexpected DNS network traffic destination

Checks installed software on the system

Enumerates physical storage devices

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-03-23 14:01

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-23 14:01

Reported

2024-03-23 14:03

Platform

win7-20240221-en

Max time kernel

148s

Max time network

138s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4fbc079afc0e59a9b99ef86981fa5326.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 1500 wrote to memory of 3004 N/A C:\Users\Admin\AppData\Local\Temp\4fbc079afc0e59a9b99ef86981fa5326.exe C:\Users\Admin\AppData\Local\Temp\is-7BJAI.tmp\4fbc079afc0e59a9b99ef86981fa5326.tmp
PID 1500 wrote to memory of 3004 N/A C:\Users\Admin\AppData\Local\Temp\4fbc079afc0e59a9b99ef86981fa5326.exe C:\Users\Admin\AppData\Local\Temp\is-7BJAI.tmp\4fbc079afc0e59a9b99ef86981fa5326.tmp
PID 1500 wrote to memory of 3004 N/A C:\Users\Admin\AppData\Local\Temp\4fbc079afc0e59a9b99ef86981fa5326.exe C:\Users\Admin\AppData\Local\Temp\is-7BJAI.tmp\4fbc079afc0e59a9b99ef86981fa5326.tmp
PID 1500 wrote to memory of 3004 N/A C:\Users\Admin\AppData\Local\Temp\4fbc079afc0e59a9b99ef86981fa5326.exe C:\Users\Admin\AppData\Local\Temp\is-7BJAI.tmp\4fbc079afc0e59a9b99ef86981fa5326.tmp
PID 1500 wrote to memory of 3004 N/A C:\Users\Admin\AppData\Local\Temp\4fbc079afc0e59a9b99ef86981fa5326.exe C:\Users\Admin\AppData\Local\Temp\is-7BJAI.tmp\4fbc079afc0e59a9b99ef86981fa5326.tmp
PID 1500 wrote to memory of 3004 N/A C:\Users\Admin\AppData\Local\Temp\4fbc079afc0e59a9b99ef86981fa5326.exe C:\Users\Admin\AppData\Local\Temp\is-7BJAI.tmp\4fbc079afc0e59a9b99ef86981fa5326.tmp
PID 1500 wrote to memory of 3004 N/A C:\Users\Admin\AppData\Local\Temp\4fbc079afc0e59a9b99ef86981fa5326.exe C:\Users\Admin\AppData\Local\Temp\is-7BJAI.tmp\4fbc079afc0e59a9b99ef86981fa5326.tmp
PID 3004 wrote to memory of 2644 N/A C:\Users\Admin\AppData\Local\Temp\is-7BJAI.tmp\4fbc079afc0e59a9b99ef86981fa5326.tmp C:\Users\Admin\AppData\Local\Color Picker\colorpicker.exe
PID 3004 wrote to memory of 2644 N/A C:\Users\Admin\AppData\Local\Temp\is-7BJAI.tmp\4fbc079afc0e59a9b99ef86981fa5326.tmp C:\Users\Admin\AppData\Local\Color Picker\colorpicker.exe
PID 3004 wrote to memory of 2644 N/A C:\Users\Admin\AppData\Local\Temp\is-7BJAI.tmp\4fbc079afc0e59a9b99ef86981fa5326.tmp C:\Users\Admin\AppData\Local\Color Picker\colorpicker.exe
PID 3004 wrote to memory of 2644 N/A C:\Users\Admin\AppData\Local\Temp\is-7BJAI.tmp\4fbc079afc0e59a9b99ef86981fa5326.tmp C:\Users\Admin\AppData\Local\Color Picker\colorpicker.exe
PID 3004 wrote to memory of 2424 N/A C:\Users\Admin\AppData\Local\Temp\is-7BJAI.tmp\4fbc079afc0e59a9b99ef86981fa5326.tmp C:\Users\Admin\AppData\Local\Color Picker\colorpicker.exe
PID 3004 wrote to memory of 2424 N/A C:\Users\Admin\AppData\Local\Temp\is-7BJAI.tmp\4fbc079afc0e59a9b99ef86981fa5326.tmp C:\Users\Admin\AppData\Local\Color Picker\colorpicker.exe
PID 3004 wrote to memory of 2424 N/A C:\Users\Admin\AppData\Local\Temp\is-7BJAI.tmp\4fbc079afc0e59a9b99ef86981fa5326.tmp C:\Users\Admin\AppData\Local\Color Picker\colorpicker.exe
PID 3004 wrote to memory of 2424 N/A C:\Users\Admin\AppData\Local\Temp\is-7BJAI.tmp\4fbc079afc0e59a9b99ef86981fa5326.tmp C:\Users\Admin\AppData\Local\Color Picker\colorpicker.exe

Processes

C:\Users\Admin\AppData\Local\Temp\4fbc079afc0e59a9b99ef86981fa5326.exe

"C:\Users\Admin\AppData\Local\Temp\4fbc079afc0e59a9b99ef86981fa5326.exe"

C:\Users\Admin\AppData\Local\Temp\is-7BJAI.tmp\4fbc079afc0e59a9b99ef86981fa5326.tmp

"C:\Users\Admin\AppData\Local\Temp\is-7BJAI.tmp\4fbc079afc0e59a9b99ef86981fa5326.tmp" /SL5="$6014E,1781689,54272,C:\Users\Admin\AppData\Local\Temp\4fbc079afc0e59a9b99ef86981fa5326.exe"

C:\Users\Admin\AppData\Local\Color Picker\colorpicker.exe

"C:\Users\Admin\AppData\Local\Color Picker\colorpicker.exe" -i

C:\Users\Admin\AppData\Local\Color Picker\colorpicker.exe

"C:\Users\Admin\AppData\Local\Color Picker\colorpicker.exe" -s

Network

Country Destination Domain Proto
SE 45.155.250.90:53 bwsuikv.com udp
MD 45.142.214.240:80 bwsuikv.com tcp

Files

memory/1500-1-0x0000000000400000-0x0000000000414000-memory.dmp

\Users\Admin\AppData\Local\Temp\is-7BJAI.tmp\4fbc079afc0e59a9b99ef86981fa5326.tmp

MD5 d394fc26de69f06950dc1c71959b0261
SHA1 7c9448fc3582f19763eaa8e3c5383b7873aee017
SHA256 405e474735b776fc09dc71d3a5b44c50b9e2c745cdf7e79eb89dc791866ffe2a
SHA512 63ef7265aac27715f5b799b588955dd5df3f49ecd0042fba69d0effe7dfe24d6777079677a809e817e4e8243a2185ca9c3a8022c9247bb2a070c213f06d7bc10

\Users\Admin\AppData\Local\Temp\is-HJ3T5.tmp\_isetup\_shfoldr.dll

MD5 92dc6ef532fbb4a5c3201469a5b5eb63
SHA1 3e89ff837147c16b4e41c30d6c796374e0b8e62c
SHA256 9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87
SHA512 9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

memory/3004-12-0x0000000000240000-0x0000000000241000-memory.dmp

\Users\Admin\AppData\Local\Temp\is-HJ3T5.tmp\_isetup\_iscrypt.dll

MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

\Users\Admin\AppData\Local\Color Picker\colorpicker.exe

MD5 a8f9420959ddb2ee550f7e21644357a7
SHA1 4e429af917fe5e50b210c1aaa12e62a3e0c51d8f
SHA256 c57954dfad4f4bc99ac2fdba834e684831d0e8f1e8fb2ccc14463090739b09e7
SHA512 d2890847e9f98a6f8a2ff1126c9c0917b17caa1c9a9d1bf59280588f4c9b1c09b92e1520c50d0eb8721bb6fe5ef235c56ea2c2bd9640423aa884d376f082d928

memory/3004-42-0x00000000033E0000-0x00000000035F1000-memory.dmp

memory/2644-44-0x0000000000400000-0x0000000000611000-memory.dmp

memory/2644-45-0x0000000000400000-0x0000000000611000-memory.dmp

memory/2644-46-0x0000000000400000-0x0000000000611000-memory.dmp

memory/2644-49-0x0000000000400000-0x0000000000611000-memory.dmp

memory/2424-52-0x0000000000400000-0x0000000000611000-memory.dmp

memory/1500-53-0x0000000000400000-0x0000000000414000-memory.dmp

memory/3004-54-0x0000000000400000-0x00000000004B8000-memory.dmp

memory/2424-55-0x0000000000400000-0x0000000000611000-memory.dmp

memory/3004-56-0x0000000000240000-0x0000000000241000-memory.dmp

memory/3004-57-0x00000000033E0000-0x00000000035F1000-memory.dmp

memory/2424-60-0x0000000000400000-0x0000000000611000-memory.dmp

memory/2424-63-0x0000000000400000-0x0000000000611000-memory.dmp

memory/2424-64-0x0000000000400000-0x0000000000611000-memory.dmp

memory/2424-67-0x0000000000400000-0x0000000000611000-memory.dmp

memory/2424-70-0x0000000000400000-0x0000000000611000-memory.dmp

memory/2424-73-0x0000000000400000-0x0000000000611000-memory.dmp

memory/2424-75-0x00000000025E0000-0x0000000002682000-memory.dmp

memory/2424-81-0x0000000000400000-0x0000000000611000-memory.dmp

memory/2424-84-0x0000000000400000-0x0000000000611000-memory.dmp

memory/2424-87-0x00000000025E0000-0x0000000002682000-memory.dmp

memory/2424-88-0x0000000000400000-0x0000000000611000-memory.dmp

memory/2424-91-0x0000000000400000-0x0000000000611000-memory.dmp

memory/2424-94-0x0000000000400000-0x0000000000611000-memory.dmp

memory/2424-97-0x0000000000400000-0x0000000000611000-memory.dmp

memory/2424-101-0x0000000000400000-0x0000000000611000-memory.dmp

memory/2424-104-0x0000000000400000-0x0000000000611000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-23 14:01

Reported

2024-03-23 14:03

Platform

win10v2004-20240226-en

Max time kernel

141s

Max time network

144s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4fbc079afc0e59a9b99ef86981fa5326.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
N/A N/A N/A N/A
N/A N/A N/A N/A

Socks5Systemz

botnet socks5systemz

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\is-CCNB8.tmp\4fbc079afc0e59a9b99ef86981fa5326.tmp N/A

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

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2368 wrote to memory of 1156 N/A C:\Users\Admin\AppData\Local\Temp\4fbc079afc0e59a9b99ef86981fa5326.exe C:\Users\Admin\AppData\Local\Temp\is-CCNB8.tmp\4fbc079afc0e59a9b99ef86981fa5326.tmp
PID 2368 wrote to memory of 1156 N/A C:\Users\Admin\AppData\Local\Temp\4fbc079afc0e59a9b99ef86981fa5326.exe C:\Users\Admin\AppData\Local\Temp\is-CCNB8.tmp\4fbc079afc0e59a9b99ef86981fa5326.tmp
PID 2368 wrote to memory of 1156 N/A C:\Users\Admin\AppData\Local\Temp\4fbc079afc0e59a9b99ef86981fa5326.exe C:\Users\Admin\AppData\Local\Temp\is-CCNB8.tmp\4fbc079afc0e59a9b99ef86981fa5326.tmp
PID 1156 wrote to memory of 3812 N/A C:\Users\Admin\AppData\Local\Temp\is-CCNB8.tmp\4fbc079afc0e59a9b99ef86981fa5326.tmp C:\Users\Admin\AppData\Local\Color Picker\colorpicker.exe
PID 1156 wrote to memory of 3812 N/A C:\Users\Admin\AppData\Local\Temp\is-CCNB8.tmp\4fbc079afc0e59a9b99ef86981fa5326.tmp C:\Users\Admin\AppData\Local\Color Picker\colorpicker.exe
PID 1156 wrote to memory of 3812 N/A C:\Users\Admin\AppData\Local\Temp\is-CCNB8.tmp\4fbc079afc0e59a9b99ef86981fa5326.tmp C:\Users\Admin\AppData\Local\Color Picker\colorpicker.exe
PID 1156 wrote to memory of 4984 N/A C:\Users\Admin\AppData\Local\Temp\is-CCNB8.tmp\4fbc079afc0e59a9b99ef86981fa5326.tmp C:\Users\Admin\AppData\Local\Color Picker\colorpicker.exe
PID 1156 wrote to memory of 4984 N/A C:\Users\Admin\AppData\Local\Temp\is-CCNB8.tmp\4fbc079afc0e59a9b99ef86981fa5326.tmp C:\Users\Admin\AppData\Local\Color Picker\colorpicker.exe
PID 1156 wrote to memory of 4984 N/A C:\Users\Admin\AppData\Local\Temp\is-CCNB8.tmp\4fbc079afc0e59a9b99ef86981fa5326.tmp C:\Users\Admin\AppData\Local\Color Picker\colorpicker.exe

Processes

C:\Users\Admin\AppData\Local\Temp\4fbc079afc0e59a9b99ef86981fa5326.exe

"C:\Users\Admin\AppData\Local\Temp\4fbc079afc0e59a9b99ef86981fa5326.exe"

C:\Users\Admin\AppData\Local\Temp\is-CCNB8.tmp\4fbc079afc0e59a9b99ef86981fa5326.tmp

"C:\Users\Admin\AppData\Local\Temp\is-CCNB8.tmp\4fbc079afc0e59a9b99ef86981fa5326.tmp" /SL5="$B0062,1781689,54272,C:\Users\Admin\AppData\Local\Temp\4fbc079afc0e59a9b99ef86981fa5326.exe"

C:\Users\Admin\AppData\Local\Color Picker\colorpicker.exe

"C:\Users\Admin\AppData\Local\Color Picker\colorpicker.exe" -i

C:\Users\Admin\AppData\Local\Color Picker\colorpicker.exe

"C:\Users\Admin\AppData\Local\Color Picker\colorpicker.exe" -s

Network

Country Destination Domain Proto
US 8.8.8.8:53 133.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 179.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.200:443 g.bing.com tcp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 198.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 14.227.111.52.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 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
LT 91.211.247.248:53 dlgjogd.info udp
TR 195.16.74.230:80 dlgjogd.info tcp
US 8.8.8.8:53 248.247.211.91.in-addr.arpa udp
NL 193.222.96.219:2023 tcp
US 8.8.8.8:53 230.74.16.195.in-addr.arpa udp
US 8.8.8.8:53 219.96.222.193.in-addr.arpa udp

Files

memory/2368-0-0x0000000000400000-0x0000000000414000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\is-CCNB8.tmp\4fbc079afc0e59a9b99ef86981fa5326.tmp

MD5 d394fc26de69f06950dc1c71959b0261
SHA1 7c9448fc3582f19763eaa8e3c5383b7873aee017
SHA256 405e474735b776fc09dc71d3a5b44c50b9e2c745cdf7e79eb89dc791866ffe2a
SHA512 63ef7265aac27715f5b799b588955dd5df3f49ecd0042fba69d0effe7dfe24d6777079677a809e817e4e8243a2185ca9c3a8022c9247bb2a070c213f06d7bc10

memory/1156-6-0x0000000000760000-0x0000000000761000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\is-95NQF.tmp\_isetup\_iscrypt.dll

MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

C:\Users\Admin\AppData\Local\Color Picker\colorpicker.exe

MD5 573a32c38529f9a45e6cf9bc57d53544
SHA1 cca17d4dcae9ac65ba025aeb6a5e8ed2fddeb0a8
SHA256 061adb43b0356a0bf2ea0613342a86193af55c9e4e0faf2b37f428a86219b9fc
SHA512 32f989250af3a2f4d6752d61d1d0a88547f32c30a870b1176da5f10ef7e535d5c1b08af5865cc73f4cf48a9c88a59ea5ebb079952af5b6b002c94fd143796ad4

memory/3812-37-0x0000000000400000-0x0000000000611000-memory.dmp

memory/3812-38-0x0000000000400000-0x0000000000611000-memory.dmp

C:\Users\Admin\AppData\Local\Color Picker\colorpicker.exe

MD5 a8f9420959ddb2ee550f7e21644357a7
SHA1 4e429af917fe5e50b210c1aaa12e62a3e0c51d8f
SHA256 c57954dfad4f4bc99ac2fdba834e684831d0e8f1e8fb2ccc14463090739b09e7
SHA512 d2890847e9f98a6f8a2ff1126c9c0917b17caa1c9a9d1bf59280588f4c9b1c09b92e1520c50d0eb8721bb6fe5ef235c56ea2c2bd9640423aa884d376f082d928

memory/3812-42-0x0000000000400000-0x0000000000611000-memory.dmp

memory/4984-45-0x0000000000400000-0x0000000000611000-memory.dmp

memory/2368-46-0x0000000000400000-0x0000000000414000-memory.dmp

memory/1156-47-0x0000000000400000-0x00000000004B8000-memory.dmp

memory/4984-48-0x0000000000400000-0x0000000000611000-memory.dmp

memory/1156-49-0x0000000000760000-0x0000000000761000-memory.dmp

memory/4984-52-0x0000000000400000-0x0000000000611000-memory.dmp

memory/4984-53-0x0000000000400000-0x0000000000611000-memory.dmp

memory/4984-56-0x0000000000400000-0x0000000000611000-memory.dmp

memory/4984-59-0x0000000000400000-0x0000000000611000-memory.dmp

memory/4984-62-0x0000000000400000-0x0000000000611000-memory.dmp

memory/4984-63-0x00000000008A0000-0x0000000000942000-memory.dmp

memory/4984-67-0x0000000000400000-0x0000000000611000-memory.dmp

memory/4984-68-0x00000000008A0000-0x0000000000942000-memory.dmp

memory/4984-73-0x0000000000400000-0x0000000000611000-memory.dmp

memory/4984-76-0x0000000000400000-0x0000000000611000-memory.dmp

memory/4984-77-0x00000000008A0000-0x0000000000942000-memory.dmp

memory/4984-80-0x0000000000400000-0x0000000000611000-memory.dmp

memory/4984-83-0x0000000000400000-0x0000000000611000-memory.dmp

memory/4984-86-0x0000000000400000-0x0000000000611000-memory.dmp

memory/4984-89-0x0000000000400000-0x0000000000611000-memory.dmp

memory/4984-90-0x00000000008A0000-0x0000000000942000-memory.dmp

memory/4984-91-0x00000000008A0000-0x0000000000942000-memory.dmp

memory/4984-95-0x0000000000400000-0x0000000000611000-memory.dmp

memory/4984-98-0x0000000000400000-0x0000000000611000-memory.dmp