Malware Analysis Report

2025-08-10 14:10

Sample ID 240803-xvx86sxbma
Target crt.exe
SHA256 0384c6409bb5afac939fef6bb65bb6e5ca9d61eee4f20652e754cf0410cb7ebb
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

0384c6409bb5afac939fef6bb65bb6e5ca9d61eee4f20652e754cf0410cb7ebb

Threat Level: Known bad

The file crt.exe was found to be: Known bad.

Malicious Activity Summary

socks5systemz botnet discovery

Detect Socks5Systemz Payload

Socks5Systemz

Executes dropped EXE

Unexpected DNS network traffic destination

Loads dropped DLL

Checks installed software on the system

Unsigned PE

System Location Discovery: System Language Discovery

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

Suspicious use of FindShellTrayWindow

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-03 19:11

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-03 19:11

Reported

2024-08-03 19:13

Platform

win7-20240705-en

Max time kernel

149s

Max time network

137s

Command Line

"C:\Users\Admin\AppData\Local\Temp\crt.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\crt.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\is-MH6G8.tmp\crt.tmp N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Jeengle\jeengle32_64.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Jeengle\jeengle32_64.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\is-MH6G8.tmp\crt.tmp N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\is-MH6G8.tmp\crt.tmp N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\is-MH6G8.tmp\crt.tmp N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1772 wrote to memory of 2324 N/A C:\Users\Admin\AppData\Local\Temp\crt.exe C:\Users\Admin\AppData\Local\Temp\is-MH6G8.tmp\crt.tmp
PID 1772 wrote to memory of 2324 N/A C:\Users\Admin\AppData\Local\Temp\crt.exe C:\Users\Admin\AppData\Local\Temp\is-MH6G8.tmp\crt.tmp
PID 1772 wrote to memory of 2324 N/A C:\Users\Admin\AppData\Local\Temp\crt.exe C:\Users\Admin\AppData\Local\Temp\is-MH6G8.tmp\crt.tmp
PID 1772 wrote to memory of 2324 N/A C:\Users\Admin\AppData\Local\Temp\crt.exe C:\Users\Admin\AppData\Local\Temp\is-MH6G8.tmp\crt.tmp
PID 1772 wrote to memory of 2324 N/A C:\Users\Admin\AppData\Local\Temp\crt.exe C:\Users\Admin\AppData\Local\Temp\is-MH6G8.tmp\crt.tmp
PID 1772 wrote to memory of 2324 N/A C:\Users\Admin\AppData\Local\Temp\crt.exe C:\Users\Admin\AppData\Local\Temp\is-MH6G8.tmp\crt.tmp
PID 1772 wrote to memory of 2324 N/A C:\Users\Admin\AppData\Local\Temp\crt.exe C:\Users\Admin\AppData\Local\Temp\is-MH6G8.tmp\crt.tmp
PID 2324 wrote to memory of 2244 N/A C:\Users\Admin\AppData\Local\Temp\is-MH6G8.tmp\crt.tmp C:\Users\Admin\AppData\Local\Jeengle\jeengle32_64.exe
PID 2324 wrote to memory of 2244 N/A C:\Users\Admin\AppData\Local\Temp\is-MH6G8.tmp\crt.tmp C:\Users\Admin\AppData\Local\Jeengle\jeengle32_64.exe
PID 2324 wrote to memory of 2244 N/A C:\Users\Admin\AppData\Local\Temp\is-MH6G8.tmp\crt.tmp C:\Users\Admin\AppData\Local\Jeengle\jeengle32_64.exe
PID 2324 wrote to memory of 2244 N/A C:\Users\Admin\AppData\Local\Temp\is-MH6G8.tmp\crt.tmp C:\Users\Admin\AppData\Local\Jeengle\jeengle32_64.exe
PID 2324 wrote to memory of 2588 N/A C:\Users\Admin\AppData\Local\Temp\is-MH6G8.tmp\crt.tmp C:\Users\Admin\AppData\Local\Jeengle\jeengle32_64.exe
PID 2324 wrote to memory of 2588 N/A C:\Users\Admin\AppData\Local\Temp\is-MH6G8.tmp\crt.tmp C:\Users\Admin\AppData\Local\Jeengle\jeengle32_64.exe
PID 2324 wrote to memory of 2588 N/A C:\Users\Admin\AppData\Local\Temp\is-MH6G8.tmp\crt.tmp C:\Users\Admin\AppData\Local\Jeengle\jeengle32_64.exe
PID 2324 wrote to memory of 2588 N/A C:\Users\Admin\AppData\Local\Temp\is-MH6G8.tmp\crt.tmp C:\Users\Admin\AppData\Local\Jeengle\jeengle32_64.exe

Processes

C:\Users\Admin\AppData\Local\Temp\crt.exe

"C:\Users\Admin\AppData\Local\Temp\crt.exe"

C:\Users\Admin\AppData\Local\Temp\is-MH6G8.tmp\crt.tmp

"C:\Users\Admin\AppData\Local\Temp\is-MH6G8.tmp\crt.tmp" /SL5="$30154,3727048,54272,C:\Users\Admin\AppData\Local\Temp\crt.exe"

C:\Users\Admin\AppData\Local\Jeengle\jeengle32_64.exe

"C:\Users\Admin\AppData\Local\Jeengle\jeengle32_64.exe" -i

C:\Users\Admin\AppData\Local\Jeengle\jeengle32_64.exe

"C:\Users\Admin\AppData\Local\Jeengle\jeengle32_64.exe" -s

Network

Country Destination Domain Proto
HK 141.98.234.31:53 bhbgbiz.com udp
CH 185.196.8.214:80 bhbgbiz.com tcp

Files

memory/1772-0-0x0000000000400000-0x0000000000414000-memory.dmp

memory/1772-2-0x0000000000401000-0x000000000040B000-memory.dmp

\Users\Admin\AppData\Local\Temp\is-MH6G8.tmp\crt.tmp

MD5 96e2c8db3dd8e1f3632aab3b400e4b9a
SHA1 4272048cddf5a17cee879c2c421f61e33baeff69
SHA256 624f7af3f2c4baa83666b9d02935116368c7660d5ee7059704f1d7279cde4cf2
SHA512 1d1642d10d31bf54e78fa6b3bba5e31b4fe745f1834d61dcf5ffd1d99934c1d7ba3ecc4832d0c3519380f5ded71632bf084ad4cfb3f74785e54d434508a8e984

\Users\Admin\AppData\Local\Temp\is-703CC.tmp\_isetup\_shfoldr.dll

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

memory/2324-16-0x0000000000400000-0x00000000004BD000-memory.dmp

\Users\Admin\AppData\Local\Temp\is-703CC.tmp\_isetup\_iscrypt.dll

MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

\Users\Admin\AppData\Local\Jeengle\jeengle32_64.exe

MD5 4925ca5d4f92f8f94143c07230ad902e
SHA1 ee19d5ec9bf9ae559b8d9fdb5867fa82b69e56e8
SHA256 3630e5ae47900bd8039dd6fd7fd0cac05286b029504b01dcc9d122f449576965
SHA512 721118e2cdea68f407c48f3b04774a87aae65c1f3529b2149c49471d231fd0b8fe39125f654dda8d7f527901d8971595ba2ded8734bb27c986f94e2e4c59a4ee

memory/2324-53-0x00000000066E0000-0x0000000006B43000-memory.dmp

memory/2244-57-0x0000000000400000-0x0000000000863000-memory.dmp

memory/2244-61-0x0000000000400000-0x0000000000863000-memory.dmp

memory/2588-63-0x0000000000400000-0x0000000000863000-memory.dmp

memory/1772-65-0x0000000000400000-0x0000000000414000-memory.dmp

memory/2324-66-0x0000000000400000-0x00000000004BD000-memory.dmp

memory/2588-69-0x0000000000400000-0x0000000000863000-memory.dmp

memory/2588-72-0x0000000000400000-0x0000000000863000-memory.dmp

memory/2588-73-0x0000000000400000-0x0000000000863000-memory.dmp

memory/2588-78-0x0000000000400000-0x0000000000863000-memory.dmp

memory/2588-81-0x0000000000400000-0x0000000000863000-memory.dmp

memory/2588-84-0x0000000000400000-0x0000000000863000-memory.dmp

memory/2588-85-0x00000000023B0000-0x0000000002452000-memory.dmp

memory/2588-89-0x0000000000400000-0x0000000000863000-memory.dmp

memory/2588-94-0x0000000000400000-0x0000000000863000-memory.dmp

memory/2588-97-0x0000000000400000-0x0000000000863000-memory.dmp

memory/2588-98-0x0000000000400000-0x0000000000863000-memory.dmp

memory/2588-101-0x0000000000400000-0x0000000000863000-memory.dmp

memory/2588-106-0x0000000000400000-0x0000000000863000-memory.dmp

memory/2588-110-0x0000000000400000-0x0000000000863000-memory.dmp

memory/2588-111-0x0000000000400000-0x0000000000863000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-03 19:11

Reported

2024-08-03 19:13

Platform

win10v2004-20240802-en

Max time kernel

143s

Max time network

128s

Command Line

"C:\Users\Admin\AppData\Local\Temp\crt.exe"

Signatures

Detect Socks5Systemz Payload

Description Indicator Process Target
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-V1MIO.tmp\crt.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

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\crt.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\is-V1MIO.tmp\crt.tmp N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Jeengle\jeengle32_64.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Jeengle\jeengle32_64.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\is-V1MIO.tmp\crt.tmp N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\is-V1MIO.tmp\crt.tmp N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\is-V1MIO.tmp\crt.tmp N/A

Processes

C:\Users\Admin\AppData\Local\Temp\crt.exe

"C:\Users\Admin\AppData\Local\Temp\crt.exe"

C:\Users\Admin\AppData\Local\Temp\is-V1MIO.tmp\crt.tmp

"C:\Users\Admin\AppData\Local\Temp\is-V1MIO.tmp\crt.tmp" /SL5="$601E8,3727048,54272,C:\Users\Admin\AppData\Local\Temp\crt.exe"

C:\Users\Admin\AppData\Local\Jeengle\jeengle32_64.exe

"C:\Users\Admin\AppData\Local\Jeengle\jeengle32_64.exe" -i

C:\Users\Admin\AppData\Local\Jeengle\jeengle32_64.exe

"C:\Users\Admin\AppData\Local\Jeengle\jeengle32_64.exe" -s

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 73.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp
LT 91.211.247.248:53 bpbuqun.com udp
CH 185.196.8.214:80 bpbuqun.com tcp
US 8.8.8.8:53 248.247.211.91.in-addr.arpa udp
US 8.8.8.8:53 214.8.196.185.in-addr.arpa udp

Files

memory/1848-1-0x0000000000400000-0x0000000000414000-memory.dmp

memory/1848-2-0x0000000000401000-0x000000000040B000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\is-V1MIO.tmp\crt.tmp

MD5 96e2c8db3dd8e1f3632aab3b400e4b9a
SHA1 4272048cddf5a17cee879c2c421f61e33baeff69
SHA256 624f7af3f2c4baa83666b9d02935116368c7660d5ee7059704f1d7279cde4cf2
SHA512 1d1642d10d31bf54e78fa6b3bba5e31b4fe745f1834d61dcf5ffd1d99934c1d7ba3ecc4832d0c3519380f5ded71632bf084ad4cfb3f74785e54d434508a8e984

memory/320-10-0x0000000000400000-0x00000000004BD000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\is-A0QTH.tmp\_isetup\_iscrypt.dll

MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

C:\Users\Admin\AppData\Local\Jeengle\jeengle32_64.exe

MD5 4925ca5d4f92f8f94143c07230ad902e
SHA1 ee19d5ec9bf9ae559b8d9fdb5867fa82b69e56e8
SHA256 3630e5ae47900bd8039dd6fd7fd0cac05286b029504b01dcc9d122f449576965
SHA512 721118e2cdea68f407c48f3b04774a87aae65c1f3529b2149c49471d231fd0b8fe39125f654dda8d7f527901d8971595ba2ded8734bb27c986f94e2e4c59a4ee

memory/1860-52-0x0000000000400000-0x0000000000863000-memory.dmp

memory/1860-53-0x0000000000400000-0x0000000000863000-memory.dmp

memory/1860-56-0x0000000000400000-0x0000000000863000-memory.dmp

memory/1860-57-0x0000000000400000-0x0000000000863000-memory.dmp

memory/1592-60-0x0000000000400000-0x0000000000863000-memory.dmp

memory/1848-61-0x0000000000400000-0x0000000000414000-memory.dmp

memory/320-62-0x0000000000400000-0x00000000004BD000-memory.dmp

memory/1592-63-0x0000000000400000-0x0000000000863000-memory.dmp

memory/1592-66-0x0000000000400000-0x0000000000863000-memory.dmp

memory/1592-69-0x0000000000400000-0x0000000000863000-memory.dmp

memory/1592-72-0x0000000000400000-0x0000000000863000-memory.dmp

memory/1592-75-0x0000000000400000-0x0000000000863000-memory.dmp

memory/1592-78-0x00000000026B0000-0x0000000002752000-memory.dmp

memory/1592-80-0x0000000000400000-0x0000000000863000-memory.dmp

memory/1592-85-0x0000000000400000-0x0000000000863000-memory.dmp

memory/1592-88-0x0000000000400000-0x0000000000863000-memory.dmp

memory/1592-91-0x0000000000400000-0x0000000000863000-memory.dmp

memory/1592-94-0x0000000000400000-0x0000000000863000-memory.dmp

memory/1592-97-0x0000000000400000-0x0000000000863000-memory.dmp

memory/1592-100-0x0000000000400000-0x0000000000863000-memory.dmp

memory/1592-104-0x0000000000400000-0x0000000000863000-memory.dmp

memory/1592-107-0x0000000000400000-0x0000000000863000-memory.dmp