Malware Analysis Report

2024-11-15 05:01

Sample ID 240530-2b7eysbf8s
Target efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2
SHA256 efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2
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

efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2

Threat Level: Known bad

The file efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2 was found to be: Known bad.

Malicious Activity Summary

socks5systemz botnet discovery

Detect Socks5Systemz Payload

Socks5Systemz

Unexpected DNS network traffic destination

Executes dropped EXE

Loads dropped DLL

Checks installed software on the system

Enumerates physical storage devices

Unsigned PE

Suspicious use of FindShellTrayWindow

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-30 22:25

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-30 22:25

Reported

2024-05-30 22:28

Platform

win10v2004-20240508-en

Max time kernel

150s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.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

Enumerates physical storage devices

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\is-FMH0L.tmp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.tmp N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1872 wrote to memory of 3380 N/A C:\Users\Admin\AppData\Local\Temp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.exe C:\Users\Admin\AppData\Local\Temp\is-FMH0L.tmp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.tmp
PID 1872 wrote to memory of 3380 N/A C:\Users\Admin\AppData\Local\Temp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.exe C:\Users\Admin\AppData\Local\Temp\is-FMH0L.tmp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.tmp
PID 1872 wrote to memory of 3380 N/A C:\Users\Admin\AppData\Local\Temp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.exe C:\Users\Admin\AppData\Local\Temp\is-FMH0L.tmp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.tmp
PID 3380 wrote to memory of 1888 N/A C:\Users\Admin\AppData\Local\Temp\is-FMH0L.tmp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.tmp C:\Users\Admin\AppData\Local\5K Player\5kplayer32.exe
PID 3380 wrote to memory of 1888 N/A C:\Users\Admin\AppData\Local\Temp\is-FMH0L.tmp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.tmp C:\Users\Admin\AppData\Local\5K Player\5kplayer32.exe
PID 3380 wrote to memory of 1888 N/A C:\Users\Admin\AppData\Local\Temp\is-FMH0L.tmp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.tmp C:\Users\Admin\AppData\Local\5K Player\5kplayer32.exe
PID 3380 wrote to memory of 1288 N/A C:\Users\Admin\AppData\Local\Temp\is-FMH0L.tmp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.tmp C:\Users\Admin\AppData\Local\5K Player\5kplayer32.exe
PID 3380 wrote to memory of 1288 N/A C:\Users\Admin\AppData\Local\Temp\is-FMH0L.tmp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.tmp C:\Users\Admin\AppData\Local\5K Player\5kplayer32.exe
PID 3380 wrote to memory of 1288 N/A C:\Users\Admin\AppData\Local\Temp\is-FMH0L.tmp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.tmp C:\Users\Admin\AppData\Local\5K Player\5kplayer32.exe

Processes

C:\Users\Admin\AppData\Local\Temp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.exe

"C:\Users\Admin\AppData\Local\Temp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.exe"

C:\Users\Admin\AppData\Local\Temp\is-FMH0L.tmp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.tmp

"C:\Users\Admin\AppData\Local\Temp\is-FMH0L.tmp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.tmp" /SL5="$501DA,5552432,54272,C:\Users\Admin\AppData\Local\Temp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.exe"

C:\Users\Admin\AppData\Local\5K Player\5kplayer32.exe

"C:\Users\Admin\AppData\Local\5K Player\5kplayer32.exe" -i

C:\Users\Admin\AppData\Local\5K Player\5kplayer32.exe

"C:\Users\Admin\AppData\Local\5K Player\5kplayer32.exe" -s

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4200,i,13035806169561352434,1332896185314862791,262144 --variations-seed-version --mojo-platform-channel-handle=4120 /prefetch:8

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 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 71.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.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 55.36.223.20.in-addr.arpa udp
HK 141.98.234.31:53 ayosrrp.ru udp
US 8.8.8.8:53 31.234.98.141.in-addr.arpa udp
BG 79.110.49.184:80 ayosrrp.ru tcp
BG 79.110.49.184:80 ayosrrp.ru tcp
BG 79.110.49.184:80 ayosrrp.ru tcp

Files

memory/1872-3-0x0000000000401000-0x000000000040B000-memory.dmp

memory/1872-0-0x0000000000400000-0x0000000000414000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\is-FMH0L.tmp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.tmp

MD5 ef9105d68de970efad785e01b21e4e2b
SHA1 7fe8801a3e86814972da63a7a943bdc5e31d8888
SHA256 381198ca0669ab760f6f9b84e39c39ab5e870f65d17d03ed0dc572a1c602364a
SHA512 e388cbf32a4d833c0e4c6c1a129515b4d12eac5b333f2aec39e741d3a0da856c5923d47cf4d3083ad030f7f07b9214261b2b9119720920dd42929eeb617e779c

C:\Users\Admin\AppData\Local\Temp\is-ANPFF.tmp\_isetup\_isdecmp.dll

MD5 b6f11a0ab7715f570f45900a1fe84732
SHA1 77b1201e535445af5ea94c1b03c0a1c34d67a77b
SHA256 e47dd306a9854599f02bc1b07ca6dfbd5220f8a1352faa9616d1a327de0bbf67
SHA512 78a757e67d21eb7cc95954df15e3eeff56113d6b40fb73f0c5f53304265cc52c79125d6f1b3655b64f9a411711b5b70f746080d708d7c222f4e65bad64b1b771

memory/3380-13-0x0000000000400000-0x00000000004BA000-memory.dmp

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

MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

C:\Users\Admin\AppData\Local\5K Player\5kplayer32.exe

MD5 faab2e87fa17725a687300a1e0c1ae26
SHA1 45f7128cdab20c1ab7d34e3f54374eae838a05e7
SHA256 6d345036ec98aaffdff6b071e097018b576ff81e767533816b4de9adfcc7f57a
SHA512 a99e4428c58f47963b9e4265dd6516aece4387ac23839bb02ac308c437177e2fc551fa877c321654c9ff02d8612e31ff525fb91cfbf6b048296e312001dd7038

memory/1888-65-0x0000000000400000-0x0000000000745000-memory.dmp

memory/1888-66-0x0000000000400000-0x0000000000745000-memory.dmp

memory/1888-67-0x0000000000400000-0x0000000000745000-memory.dmp

memory/1888-71-0x0000000000400000-0x0000000000745000-memory.dmp

memory/1288-74-0x0000000000400000-0x0000000000745000-memory.dmp

memory/1872-75-0x0000000000400000-0x0000000000414000-memory.dmp

memory/3380-76-0x0000000000400000-0x00000000004BA000-memory.dmp

memory/1288-77-0x0000000000400000-0x0000000000745000-memory.dmp

memory/1288-80-0x0000000000400000-0x0000000000745000-memory.dmp

memory/1288-83-0x0000000000400000-0x0000000000745000-memory.dmp

memory/1288-86-0x0000000000400000-0x0000000000745000-memory.dmp

memory/1288-89-0x0000000000400000-0x0000000000745000-memory.dmp

memory/1288-92-0x0000000002870000-0x0000000002912000-memory.dmp

memory/1288-95-0x0000000000400000-0x0000000000745000-memory.dmp

memory/1288-100-0x0000000000400000-0x0000000000745000-memory.dmp

memory/1288-103-0x0000000000400000-0x0000000000745000-memory.dmp

memory/1288-106-0x0000000000400000-0x0000000000745000-memory.dmp

memory/1288-109-0x0000000000400000-0x0000000000745000-memory.dmp

memory/1288-112-0x0000000000400000-0x0000000000745000-memory.dmp

memory/1288-115-0x0000000000400000-0x0000000000745000-memory.dmp

memory/1288-118-0x0000000000400000-0x0000000000745000-memory.dmp

memory/1288-121-0x0000000000400000-0x0000000000745000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-30 22:25

Reported

2024-05-30 22:28

Platform

win11-20240508-en

Max time kernel

146s

Max time network

156s

Command Line

"C:\Users\Admin\AppData\Local\Temp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.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 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-RH0KM.tmp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.tmp N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4852 wrote to memory of 864 N/A C:\Users\Admin\AppData\Local\Temp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.exe C:\Users\Admin\AppData\Local\Temp\is-RH0KM.tmp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.tmp
PID 4852 wrote to memory of 864 N/A C:\Users\Admin\AppData\Local\Temp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.exe C:\Users\Admin\AppData\Local\Temp\is-RH0KM.tmp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.tmp
PID 4852 wrote to memory of 864 N/A C:\Users\Admin\AppData\Local\Temp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.exe C:\Users\Admin\AppData\Local\Temp\is-RH0KM.tmp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.tmp
PID 864 wrote to memory of 1076 N/A C:\Users\Admin\AppData\Local\Temp\is-RH0KM.tmp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.tmp C:\Users\Admin\AppData\Local\5K Player\5kplayer32.exe
PID 864 wrote to memory of 1076 N/A C:\Users\Admin\AppData\Local\Temp\is-RH0KM.tmp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.tmp C:\Users\Admin\AppData\Local\5K Player\5kplayer32.exe
PID 864 wrote to memory of 1076 N/A C:\Users\Admin\AppData\Local\Temp\is-RH0KM.tmp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.tmp C:\Users\Admin\AppData\Local\5K Player\5kplayer32.exe
PID 864 wrote to memory of 4916 N/A C:\Users\Admin\AppData\Local\Temp\is-RH0KM.tmp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.tmp C:\Users\Admin\AppData\Local\5K Player\5kplayer32.exe
PID 864 wrote to memory of 4916 N/A C:\Users\Admin\AppData\Local\Temp\is-RH0KM.tmp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.tmp C:\Users\Admin\AppData\Local\5K Player\5kplayer32.exe
PID 864 wrote to memory of 4916 N/A C:\Users\Admin\AppData\Local\Temp\is-RH0KM.tmp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.tmp C:\Users\Admin\AppData\Local\5K Player\5kplayer32.exe

Processes

C:\Users\Admin\AppData\Local\Temp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.exe

"C:\Users\Admin\AppData\Local\Temp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.exe"

C:\Users\Admin\AppData\Local\Temp\is-RH0KM.tmp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.tmp

"C:\Users\Admin\AppData\Local\Temp\is-RH0KM.tmp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.tmp" /SL5="$40208,5552432,54272,C:\Users\Admin\AppData\Local\Temp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.exe"

C:\Users\Admin\AppData\Local\5K Player\5kplayer32.exe

"C:\Users\Admin\AppData\Local\5K Player\5kplayer32.exe" -i

C:\Users\Admin\AppData\Local\5K Player\5kplayer32.exe

"C:\Users\Admin\AppData\Local\5K Player\5kplayer32.exe" -s

Network

Country Destination Domain Proto
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp
SE 45.155.250.90:53 ayqxxoi.ru udp
BG 79.110.49.184:80 ayqxxoi.ru tcp
BG 79.110.49.184:80 ayqxxoi.ru tcp
BG 79.110.49.184:80 ayqxxoi.ru tcp

Files

memory/4852-0-0x0000000000400000-0x0000000000414000-memory.dmp

memory/4852-2-0x0000000000401000-0x000000000040B000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\is-RH0KM.tmp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.tmp

MD5 ef9105d68de970efad785e01b21e4e2b
SHA1 7fe8801a3e86814972da63a7a943bdc5e31d8888
SHA256 381198ca0669ab760f6f9b84e39c39ab5e870f65d17d03ed0dc572a1c602364a
SHA512 e388cbf32a4d833c0e4c6c1a129515b4d12eac5b333f2aec39e741d3a0da856c5923d47cf4d3083ad030f7f07b9214261b2b9119720920dd42929eeb617e779c

C:\Users\Admin\AppData\Local\Temp\is-6G4VF.tmp\_isetup\_isdecmp.dll

MD5 b6f11a0ab7715f570f45900a1fe84732
SHA1 77b1201e535445af5ea94c1b03c0a1c34d67a77b
SHA256 e47dd306a9854599f02bc1b07ca6dfbd5220f8a1352faa9616d1a327de0bbf67
SHA512 78a757e67d21eb7cc95954df15e3eeff56113d6b40fb73f0c5f53304265cc52c79125d6f1b3655b64f9a411711b5b70f746080d708d7c222f4e65bad64b1b771

C:\Users\Admin\AppData\Local\Temp\is-6G4VF.tmp\_isetup\_iscrypt.dll

MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

memory/864-22-0x0000000000400000-0x00000000004BA000-memory.dmp

C:\Users\Admin\AppData\Local\5K Player\5kplayer32.exe

MD5 faab2e87fa17725a687300a1e0c1ae26
SHA1 45f7128cdab20c1ab7d34e3f54374eae838a05e7
SHA256 6d345036ec98aaffdff6b071e097018b576ff81e767533816b4de9adfcc7f57a
SHA512 a99e4428c58f47963b9e4265dd6516aece4387ac23839bb02ac308c437177e2fc551fa877c321654c9ff02d8612e31ff525fb91cfbf6b048296e312001dd7038

memory/1076-66-0x0000000000400000-0x0000000000745000-memory.dmp

memory/1076-65-0x0000000000400000-0x0000000000745000-memory.dmp

memory/1076-68-0x0000000000400000-0x0000000000745000-memory.dmp

memory/1076-71-0x0000000000400000-0x0000000000745000-memory.dmp

memory/4916-75-0x0000000000400000-0x0000000000745000-memory.dmp

memory/4916-74-0x0000000000400000-0x0000000000745000-memory.dmp

memory/4852-76-0x0000000000400000-0x0000000000414000-memory.dmp

memory/864-77-0x0000000000400000-0x00000000004BA000-memory.dmp

memory/4916-78-0x0000000000400000-0x0000000000745000-memory.dmp

memory/4916-81-0x0000000000400000-0x0000000000745000-memory.dmp

memory/4916-82-0x0000000000400000-0x0000000000745000-memory.dmp

memory/4916-85-0x0000000000400000-0x0000000000745000-memory.dmp

memory/4916-88-0x0000000000400000-0x0000000000745000-memory.dmp

memory/4916-91-0x0000000000400000-0x0000000000745000-memory.dmp

memory/4916-94-0x0000000000B40000-0x0000000000BE2000-memory.dmp

memory/4916-97-0x0000000000400000-0x0000000000745000-memory.dmp

memory/4916-102-0x0000000000400000-0x0000000000745000-memory.dmp

memory/4916-105-0x0000000000400000-0x0000000000745000-memory.dmp

memory/4916-108-0x0000000000400000-0x0000000000745000-memory.dmp

memory/4916-111-0x0000000000400000-0x0000000000745000-memory.dmp

memory/4916-114-0x0000000000400000-0x0000000000745000-memory.dmp

memory/4916-117-0x0000000000400000-0x0000000000745000-memory.dmp

memory/4916-120-0x0000000000400000-0x0000000000745000-memory.dmp

memory/4916-123-0x0000000000400000-0x0000000000745000-memory.dmp