Malware Analysis Report

2025-08-10 14:04

Sample ID 240803-s4rerssdlc
Target a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2
SHA256 a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2
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

a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2

Threat Level: Known bad

The file a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2 was found to be: Known bad.

Malicious Activity Summary

socks5systemz botnet discovery

Detect Socks5Systemz Payload

Socks5Systemz

Loads dropped DLL

Unexpected DNS network traffic destination

Executes dropped EXE

Checks installed software on the system

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of FindShellTrayWindow

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-03 15:41

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-03 15:41

Reported

2024-08-03 15:43

Platform

win10v2004-20240802-en

Max time kernel

142s

Max time network

126s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.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\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\is-VNIV7.tmp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.tmp N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Jeengle\jeengle32.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Jeengle\jeengle32.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\is-VNIV7.tmp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.tmp N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1236 wrote to memory of 1656 N/A C:\Users\Admin\AppData\Local\Temp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.exe C:\Users\Admin\AppData\Local\Temp\is-VNIV7.tmp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.tmp
PID 1236 wrote to memory of 1656 N/A C:\Users\Admin\AppData\Local\Temp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.exe C:\Users\Admin\AppData\Local\Temp\is-VNIV7.tmp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.tmp
PID 1236 wrote to memory of 1656 N/A C:\Users\Admin\AppData\Local\Temp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.exe C:\Users\Admin\AppData\Local\Temp\is-VNIV7.tmp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.tmp
PID 1656 wrote to memory of 1852 N/A C:\Users\Admin\AppData\Local\Temp\is-VNIV7.tmp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.tmp C:\Users\Admin\AppData\Local\Jeengle\jeengle32.exe
PID 1656 wrote to memory of 1852 N/A C:\Users\Admin\AppData\Local\Temp\is-VNIV7.tmp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.tmp C:\Users\Admin\AppData\Local\Jeengle\jeengle32.exe
PID 1656 wrote to memory of 1852 N/A C:\Users\Admin\AppData\Local\Temp\is-VNIV7.tmp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.tmp C:\Users\Admin\AppData\Local\Jeengle\jeengle32.exe
PID 1656 wrote to memory of 464 N/A C:\Users\Admin\AppData\Local\Temp\is-VNIV7.tmp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.tmp C:\Users\Admin\AppData\Local\Jeengle\jeengle32.exe
PID 1656 wrote to memory of 464 N/A C:\Users\Admin\AppData\Local\Temp\is-VNIV7.tmp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.tmp C:\Users\Admin\AppData\Local\Jeengle\jeengle32.exe
PID 1656 wrote to memory of 464 N/A C:\Users\Admin\AppData\Local\Temp\is-VNIV7.tmp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.tmp C:\Users\Admin\AppData\Local\Jeengle\jeengle32.exe

Processes

C:\Users\Admin\AppData\Local\Temp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.exe

"C:\Users\Admin\AppData\Local\Temp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.exe"

C:\Users\Admin\AppData\Local\Temp\is-VNIV7.tmp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.tmp

"C:\Users\Admin\AppData\Local\Temp\is-VNIV7.tmp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.tmp" /SL5="$3017C,3922260,54272,C:\Users\Admin\AppData\Local\Temp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.exe"

C:\Users\Admin\AppData\Local\Jeengle\jeengle32.exe

"C:\Users\Admin\AppData\Local\Jeengle\jeengle32.exe" -i

C:\Users\Admin\AppData\Local\Jeengle\jeengle32.exe

"C:\Users\Admin\AppData\Local\Jeengle\jeengle32.exe" -s

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
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 22.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 81.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 237.21.107.13.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 100.58.20.217.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp
HK 141.98.234.31:53 bmpeubf.com udp
US 8.8.8.8:53 31.234.98.141.in-addr.arpa udp
CH 185.196.8.214:80 bmpeubf.com tcp
US 8.8.8.8:53 214.8.196.185.in-addr.arpa udp

Files

memory/1236-0-0x0000000000400000-0x0000000000414000-memory.dmp

memory/1236-2-0x0000000000401000-0x000000000040B000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\is-VNIV7.tmp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.tmp

MD5 78800d81ba6ad634d25059847cfb1baa
SHA1 022982bc0d006b40299bd553653970acb4718682
SHA256 24a25380d33d0cf52686906e1272d13c3d467307ec7194e1186cab6f3aa3af69
SHA512 83ffff319f2d910d001af4900098e8857dc9c4bd592e60b27ffdb0b49f9c8e1922ef61bfcdbebe9c1a37a7339a00ac98f05cba3d41f580513cb6971bcffd23a8

memory/1656-13-0x0000000000400000-0x00000000004BD000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\is-BIJA7.tmp\_isetup\_iscrypt.dll

MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

C:\Users\Admin\AppData\Local\Jeengle\jeengle32.exe

MD5 2261a563bfff6e976869811fb7a1cf14
SHA1 454e427c9861fa8bfa2bf3609599134d7167207c
SHA256 882fa0179b2c4881604d2102853ae30332a1d2880b020a1c3ed8ad13e9b88f22
SHA512 eca49a363576f3aea481006f5cef57bf48d7652abc2bcf958ded77b2f60fca83cd7080064992240dfd3b9cfe1a7b74b0827e4a41942014ea918b55db472d733e

memory/1852-52-0x0000000000400000-0x000000000088B000-memory.dmp

memory/1852-53-0x0000000000400000-0x000000000088B000-memory.dmp

memory/1852-57-0x0000000000400000-0x000000000088B000-memory.dmp

memory/464-60-0x0000000000400000-0x000000000088B000-memory.dmp

memory/1852-56-0x0000000000400000-0x000000000088B000-memory.dmp

memory/1236-61-0x0000000000400000-0x0000000000414000-memory.dmp

memory/1656-62-0x0000000000400000-0x00000000004BD000-memory.dmp

memory/464-63-0x0000000000400000-0x000000000088B000-memory.dmp

memory/464-66-0x0000000000400000-0x000000000088B000-memory.dmp

memory/464-69-0x0000000000400000-0x000000000088B000-memory.dmp

memory/464-72-0x0000000000400000-0x000000000088B000-memory.dmp

memory/464-75-0x0000000000400000-0x000000000088B000-memory.dmp

memory/464-78-0x00000000026A0000-0x0000000002742000-memory.dmp

memory/464-82-0x0000000000400000-0x000000000088B000-memory.dmp

memory/464-85-0x0000000000400000-0x000000000088B000-memory.dmp

memory/464-88-0x0000000000400000-0x000000000088B000-memory.dmp

memory/464-91-0x0000000000400000-0x000000000088B000-memory.dmp

memory/464-94-0x0000000000400000-0x000000000088B000-memory.dmp

memory/464-97-0x0000000000400000-0x000000000088B000-memory.dmp

memory/464-100-0x0000000000400000-0x000000000088B000-memory.dmp

memory/464-104-0x0000000000400000-0x000000000088B000-memory.dmp

memory/464-107-0x0000000000400000-0x000000000088B000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-03 15:41

Reported

2024-08-03 15:43

Platform

win11-20240802-en

Max time kernel

141s

Max time network

128s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.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\is-JTMSE.tmp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.tmp N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Jeengle\jeengle32.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Jeengle\jeengle32.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\is-JTMSE.tmp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.tmp N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 872 wrote to memory of 3904 N/A C:\Users\Admin\AppData\Local\Temp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.exe C:\Users\Admin\AppData\Local\Temp\is-JTMSE.tmp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.tmp
PID 872 wrote to memory of 3904 N/A C:\Users\Admin\AppData\Local\Temp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.exe C:\Users\Admin\AppData\Local\Temp\is-JTMSE.tmp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.tmp
PID 872 wrote to memory of 3904 N/A C:\Users\Admin\AppData\Local\Temp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.exe C:\Users\Admin\AppData\Local\Temp\is-JTMSE.tmp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.tmp
PID 3904 wrote to memory of 2092 N/A C:\Users\Admin\AppData\Local\Temp\is-JTMSE.tmp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.tmp C:\Users\Admin\AppData\Local\Jeengle\jeengle32.exe
PID 3904 wrote to memory of 2092 N/A C:\Users\Admin\AppData\Local\Temp\is-JTMSE.tmp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.tmp C:\Users\Admin\AppData\Local\Jeengle\jeengle32.exe
PID 3904 wrote to memory of 2092 N/A C:\Users\Admin\AppData\Local\Temp\is-JTMSE.tmp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.tmp C:\Users\Admin\AppData\Local\Jeengle\jeengle32.exe
PID 3904 wrote to memory of 2400 N/A C:\Users\Admin\AppData\Local\Temp\is-JTMSE.tmp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.tmp C:\Users\Admin\AppData\Local\Jeengle\jeengle32.exe
PID 3904 wrote to memory of 2400 N/A C:\Users\Admin\AppData\Local\Temp\is-JTMSE.tmp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.tmp C:\Users\Admin\AppData\Local\Jeengle\jeengle32.exe
PID 3904 wrote to memory of 2400 N/A C:\Users\Admin\AppData\Local\Temp\is-JTMSE.tmp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.tmp C:\Users\Admin\AppData\Local\Jeengle\jeengle32.exe

Processes

C:\Users\Admin\AppData\Local\Temp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.exe

"C:\Users\Admin\AppData\Local\Temp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.exe"

C:\Users\Admin\AppData\Local\Temp\is-JTMSE.tmp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.tmp

"C:\Users\Admin\AppData\Local\Temp\is-JTMSE.tmp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.tmp" /SL5="$8005E,3922260,54272,C:\Users\Admin\AppData\Local\Temp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.exe"

C:\Users\Admin\AppData\Local\Jeengle\jeengle32.exe

"C:\Users\Admin\AppData\Local\Jeengle\jeengle32.exe" -i

C:\Users\Admin\AppData\Local\Jeengle\jeengle32.exe

"C:\Users\Admin\AppData\Local\Jeengle\jeengle32.exe" -s

Network

Country Destination Domain Proto
US 8.8.8.8:53 69.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 81.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp
HK 141.98.234.31:53 cskeoed.net udp
CH 185.196.8.214:80 cskeoed.net tcp
NL 45.156.23.96:2023 tcp

Files

memory/872-0-0x0000000000400000-0x0000000000414000-memory.dmp

memory/872-2-0x0000000000401000-0x000000000040B000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\is-JTMSE.tmp\a1b8e777c790f1e1d041ce22d4c941046f90785a4ae25228e741e4bd433ba2a2.tmp

MD5 78800d81ba6ad634d25059847cfb1baa
SHA1 022982bc0d006b40299bd553653970acb4718682
SHA256 24a25380d33d0cf52686906e1272d13c3d467307ec7194e1186cab6f3aa3af69
SHA512 83ffff319f2d910d001af4900098e8857dc9c4bd592e60b27ffdb0b49f9c8e1922ef61bfcdbebe9c1a37a7339a00ac98f05cba3d41f580513cb6971bcffd23a8

memory/3904-10-0x0000000000400000-0x00000000004BD000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\is-GIF3K.tmp\_isetup\_iscrypt.dll

MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

C:\Users\Admin\AppData\Local\Jeengle\jeengle32.exe

MD5 2261a563bfff6e976869811fb7a1cf14
SHA1 454e427c9861fa8bfa2bf3609599134d7167207c
SHA256 882fa0179b2c4881604d2102853ae30332a1d2880b020a1c3ed8ad13e9b88f22
SHA512 eca49a363576f3aea481006f5cef57bf48d7652abc2bcf958ded77b2f60fca83cd7080064992240dfd3b9cfe1a7b74b0827e4a41942014ea918b55db472d733e

memory/2092-54-0x0000000000400000-0x000000000088B000-memory.dmp

memory/2092-55-0x0000000000400000-0x000000000088B000-memory.dmp

memory/2400-59-0x0000000000400000-0x000000000088B000-memory.dmp

memory/2092-52-0x0000000000400000-0x000000000088B000-memory.dmp

memory/872-60-0x0000000000400000-0x0000000000414000-memory.dmp

memory/3904-61-0x0000000000400000-0x00000000004BD000-memory.dmp

memory/2400-62-0x0000000000400000-0x000000000088B000-memory.dmp

memory/2400-65-0x0000000000400000-0x000000000088B000-memory.dmp

memory/2400-68-0x0000000000400000-0x000000000088B000-memory.dmp

memory/2400-71-0x0000000000400000-0x000000000088B000-memory.dmp

memory/2400-74-0x0000000000400000-0x000000000088B000-memory.dmp

memory/2400-77-0x00000000026A0000-0x0000000002742000-memory.dmp

memory/2400-80-0x0000000000400000-0x000000000088B000-memory.dmp

memory/2400-85-0x0000000000400000-0x000000000088B000-memory.dmp

memory/2400-88-0x0000000000400000-0x000000000088B000-memory.dmp

memory/2400-91-0x0000000000400000-0x000000000088B000-memory.dmp

memory/2400-94-0x0000000000400000-0x000000000088B000-memory.dmp

memory/2400-97-0x0000000000400000-0x000000000088B000-memory.dmp

memory/2400-100-0x0000000000400000-0x000000000088B000-memory.dmp

memory/2400-101-0x00000000026A0000-0x0000000002742000-memory.dmp

memory/2400-102-0x00000000026A0000-0x0000000002742000-memory.dmp

memory/2400-106-0x0000000000400000-0x000000000088B000-memory.dmp

memory/2400-109-0x0000000000400000-0x000000000088B000-memory.dmp