Malware Analysis Report

2024-10-10 10:40

Sample ID 240609-cg2n8aca2w
Target e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b
SHA256 e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b
Tags
socks5systemz botnet discovery
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b

Threat Level: Known bad

The file e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b was found to be: Known bad.

Malicious Activity Summary

socks5systemz botnet discovery

Socks5Systemz

Detect Socks5Systemz Payload

Loads dropped DLL

Unexpected DNS network traffic destination

Executes dropped EXE

Checks installed software on the system

Enumerates physical storage devices

Unsigned PE

Suspicious use of WriteProcessMemory

Suspicious use of FindShellTrayWindow

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-09 02:03

Signatures

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-09 02:03

Reported

2024-06-09 02:06

Platform

win11-20240426-en

Max time kernel

122s

Max time network

127s

Command Line

"C:\Users\Admin\AppData\Local\Temp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.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

Enumerates physical storage devices

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\is-GIRTC.tmp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.tmp N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2948 wrote to memory of 3364 N/A C:\Users\Admin\AppData\Local\Temp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.exe C:\Users\Admin\AppData\Local\Temp\is-GIRTC.tmp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.tmp
PID 2948 wrote to memory of 3364 N/A C:\Users\Admin\AppData\Local\Temp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.exe C:\Users\Admin\AppData\Local\Temp\is-GIRTC.tmp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.tmp
PID 2948 wrote to memory of 3364 N/A C:\Users\Admin\AppData\Local\Temp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.exe C:\Users\Admin\AppData\Local\Temp\is-GIRTC.tmp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.tmp
PID 3364 wrote to memory of 2004 N/A C:\Users\Admin\AppData\Local\Temp\is-GIRTC.tmp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.tmp C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe
PID 3364 wrote to memory of 2004 N/A C:\Users\Admin\AppData\Local\Temp\is-GIRTC.tmp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.tmp C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe
PID 3364 wrote to memory of 2004 N/A C:\Users\Admin\AppData\Local\Temp\is-GIRTC.tmp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.tmp C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe
PID 3364 wrote to memory of 3900 N/A C:\Users\Admin\AppData\Local\Temp\is-GIRTC.tmp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.tmp C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe
PID 3364 wrote to memory of 3900 N/A C:\Users\Admin\AppData\Local\Temp\is-GIRTC.tmp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.tmp C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe
PID 3364 wrote to memory of 3900 N/A C:\Users\Admin\AppData\Local\Temp\is-GIRTC.tmp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.tmp C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe

Processes

C:\Users\Admin\AppData\Local\Temp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.exe

"C:\Users\Admin\AppData\Local\Temp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.exe"

C:\Users\Admin\AppData\Local\Temp\is-GIRTC.tmp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.tmp

"C:\Users\Admin\AppData\Local\Temp\is-GIRTC.tmp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.tmp" /SL5="$4023C,4666921,54272,C:\Users\Admin\AppData\Local\Temp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.exe"

C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe

"C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe" -i

C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe

"C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe" -s

Network

Country Destination Domain Proto
US 52.111.229.19:443 tcp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp
SE 45.155.250.90:53 bbwbokn.com udp
BG 93.123.39.193:80 bbwbokn.com tcp
FR 62.210.204.81:2023 tcp

Files

memory/2948-0-0x0000000000400000-0x0000000000414000-memory.dmp

memory/2948-2-0x0000000000401000-0x000000000040B000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\is-GIRTC.tmp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.tmp

MD5 dff4f58a01a8e88e4a2f821ca761d901
SHA1 e67e24669220213f895b68c0d662b02b03469b4a
SHA256 91b049634c65dbe18368e1f2ead4ae48f62b92fdfcd119ccea0919b68bf56e76
SHA512 049cebaa8bc30f2b7b90a49f6022271247fab2a3bc0fd2e9f36d1f27e0c37926f00deedd92b5d85a8b34f2f6e9b59ee3b7e12510cfa720935a86ba820132817a

memory/3364-10-0x0000000000400000-0x00000000004BA000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\is-EVC4V.tmp\_isetup\_iscrypt.dll

MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe

MD5 eb006d9f9056a10d7041b60c92d5748d
SHA1 fb3d1c69f0ab0e80a6b1453e3b959ed6a93eab07
SHA256 70714c41c7687e2e864ef98dc47829bbb765a370ce07c4ef45ef7032c6ed241a
SHA512 26194cca01da8b17ae81996d84b572d602ba64d4de8225c47be5cc9795c4f43b73d04ee5aa6ff2233a4c9d9e21c2930e97633a67a622a9ad9d03f9bfd87f5d8f

memory/2004-59-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/2004-60-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/2004-65-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/2004-64-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/3900-68-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/3900-69-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/2948-70-0x0000000000400000-0x0000000000414000-memory.dmp

memory/3364-71-0x0000000000400000-0x00000000004BA000-memory.dmp

memory/3900-72-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/3900-75-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/3900-76-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/3900-79-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/3900-82-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/3900-85-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/3900-91-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/3900-87-0x0000000002800000-0x00000000028A2000-memory.dmp

memory/3900-96-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/3900-99-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/3900-102-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/3900-105-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/3900-108-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/3900-111-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/3900-113-0x0000000002800000-0x00000000028A2000-memory.dmp

memory/3900-112-0x0000000002800000-0x00000000028A2000-memory.dmp

memory/3900-117-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/3900-120-0x0000000000400000-0x00000000006C4000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-09 02:03

Reported

2024-06-09 02:06

Platform

win10v2004-20240426-en

Max time kernel

122s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.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 FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\is-OC6V4.tmp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.tmp N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4676 wrote to memory of 1628 N/A C:\Users\Admin\AppData\Local\Temp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.exe C:\Users\Admin\AppData\Local\Temp\is-OC6V4.tmp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.tmp
PID 4676 wrote to memory of 1628 N/A C:\Users\Admin\AppData\Local\Temp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.exe C:\Users\Admin\AppData\Local\Temp\is-OC6V4.tmp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.tmp
PID 4676 wrote to memory of 1628 N/A C:\Users\Admin\AppData\Local\Temp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.exe C:\Users\Admin\AppData\Local\Temp\is-OC6V4.tmp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.tmp
PID 1628 wrote to memory of 1020 N/A C:\Users\Admin\AppData\Local\Temp\is-OC6V4.tmp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.tmp C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe
PID 1628 wrote to memory of 1020 N/A C:\Users\Admin\AppData\Local\Temp\is-OC6V4.tmp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.tmp C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe
PID 1628 wrote to memory of 1020 N/A C:\Users\Admin\AppData\Local\Temp\is-OC6V4.tmp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.tmp C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe
PID 1628 wrote to memory of 4492 N/A C:\Users\Admin\AppData\Local\Temp\is-OC6V4.tmp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.tmp C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe
PID 1628 wrote to memory of 4492 N/A C:\Users\Admin\AppData\Local\Temp\is-OC6V4.tmp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.tmp C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe
PID 1628 wrote to memory of 4492 N/A C:\Users\Admin\AppData\Local\Temp\is-OC6V4.tmp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.tmp C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe

Processes

C:\Users\Admin\AppData\Local\Temp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.exe

"C:\Users\Admin\AppData\Local\Temp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.exe"

C:\Users\Admin\AppData\Local\Temp\is-OC6V4.tmp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.tmp

"C:\Users\Admin\AppData\Local\Temp\is-OC6V4.tmp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.tmp" /SL5="$401CE,4666921,54272,C:\Users\Admin\AppData\Local\Temp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.exe"

C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe

"C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe" -i

C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe

"C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe" -s

Network

Country Destination Domain Proto
US 8.8.8.8:53 183.142.211.20.in-addr.arpa udp
US 8.8.8.8:53 144.107.17.2.in-addr.arpa udp
US 8.8.8.8:53 140.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 203.107.17.2.in-addr.arpa udp
US 8.8.8.8:53 30.243.111.52.in-addr.arpa udp
HK 141.98.234.31:53 bfdmlcb.com udp
US 8.8.8.8:53 31.234.98.141.in-addr.arpa udp
BG 93.123.39.193:80 bfdmlcb.com tcp
FR 195.154.185.134:2023 tcp
US 8.8.8.8:53 134.185.154.195.in-addr.arpa udp
US 8.8.8.8:53 193.39.123.93.in-addr.arpa udp
US 8.8.8.8:53 14.179.89.13.in-addr.arpa udp

Files

memory/4676-2-0x0000000000401000-0x000000000040B000-memory.dmp

memory/4676-0-0x0000000000400000-0x0000000000414000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\is-OC6V4.tmp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.tmp

MD5 dff4f58a01a8e88e4a2f821ca761d901
SHA1 e67e24669220213f895b68c0d662b02b03469b4a
SHA256 91b049634c65dbe18368e1f2ead4ae48f62b92fdfcd119ccea0919b68bf56e76
SHA512 049cebaa8bc30f2b7b90a49f6022271247fab2a3bc0fd2e9f36d1f27e0c37926f00deedd92b5d85a8b34f2f6e9b59ee3b7e12510cfa720935a86ba820132817a

memory/1628-10-0x0000000000400000-0x00000000004BA000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\is-4UR29.tmp\_isetup\_iscrypt.dll

MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe

MD5 eb006d9f9056a10d7041b60c92d5748d
SHA1 fb3d1c69f0ab0e80a6b1453e3b959ed6a93eab07
SHA256 70714c41c7687e2e864ef98dc47829bbb765a370ce07c4ef45ef7032c6ed241a
SHA512 26194cca01da8b17ae81996d84b572d602ba64d4de8225c47be5cc9795c4f43b73d04ee5aa6ff2233a4c9d9e21c2930e97633a67a622a9ad9d03f9bfd87f5d8f

memory/1020-60-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/1020-65-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/1020-64-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/1020-59-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/4492-68-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/4492-69-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/4676-70-0x0000000000400000-0x0000000000414000-memory.dmp

memory/1628-71-0x0000000000400000-0x00000000004BA000-memory.dmp

memory/4492-72-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/4492-73-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/4492-76-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/4492-79-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/4492-82-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/4492-85-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/4492-87-0x0000000000A20000-0x0000000000AC2000-memory.dmp

memory/4492-90-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/4492-96-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/4492-99-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/4492-102-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/4492-105-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/4492-108-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/4492-111-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/4492-113-0x0000000000A20000-0x0000000000AC2000-memory.dmp

memory/4492-112-0x0000000000A20000-0x0000000000AC2000-memory.dmp

memory/4492-117-0x0000000000400000-0x00000000006C4000-memory.dmp

memory/4492-120-0x0000000000400000-0x00000000006C4000-memory.dmp