Malware Analysis Report

2024-11-13 16:38

Sample ID 241108-b672vs1qdy
Target 6f6ee24d416bffaefa0123fcc822ac8c66f44d4daa0aba3e19fb5802bfed9664
SHA256 6f6ee24d416bffaefa0123fcc822ac8c66f44d4daa0aba3e19fb5802bfed9664
Tags
purecrypter discovery downloader loader persistence aurora
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral4

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral5

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral3

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

6f6ee24d416bffaefa0123fcc822ac8c66f44d4daa0aba3e19fb5802bfed9664

Threat Level: Known bad

The file 6f6ee24d416bffaefa0123fcc822ac8c66f44d4daa0aba3e19fb5802bfed9664 was found to be: Known bad.

Malicious Activity Summary

purecrypter discovery downloader loader persistence aurora

Purecrypter family

PureCrypter

Aurora family

Executes dropped EXE

Adds Run key to start application

Program crash

Unsigned PE

System Location Discovery: System Language Discovery

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-08 01:46

Signatures

Aurora family

aurora

Unsigned PE

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

Analysis: behavioral4

Detonation Overview

Submitted

2024-11-08 01:46

Reported

2024-11-08 01:49

Platform

win10v2004-20241007-en

Max time kernel

94s

Max time network

136s

Command Line

"C:\Users\Admin\AppData\Local\Temp\5b198d1272b07fa5c8880604f17a4d65.exe"

Signatures

N/A

Processes

C:\Users\Admin\AppData\Local\Temp\5b198d1272b07fa5c8880604f17a4d65.exe

"C:\Users\Admin\AppData\Local\Temp\5b198d1272b07fa5c8880604f17a4d65.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 68.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 133.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 241.42.69.40.in-addr.arpa udp
US 8.8.8.8:53 98.117.19.2.in-addr.arpa udp
US 8.8.8.8:53 83.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 66.208.201.84.in-addr.arpa udp
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp

Files

N/A

Analysis: behavioral5

Detonation Overview

Submitted

2024-11-08 01:46

Reported

2024-11-08 01:49

Platform

win10v2004-20241007-en

Max time kernel

97s

Max time network

136s

Command Line

"C:\Users\Admin\AppData\Local\Temp\7d41dd6194db2b9b1514ad154451bb7a.exe"

Signatures

PureCrypter

loader downloader purecrypter

Purecrypter family

purecrypter

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\SETUP_~1.EXE N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\wextract_cleanup0 = "rundll32.exe C:\\Windows\\system32\\advpack.dll,DelNodeRunDLL32 \"C:\\Users\\Admin\\AppData\\Local\\Temp\\IXP000.TMP\\\"" C:\Users\Admin\AppData\Local\Temp\7d41dd6194db2b9b1514ad154451bb7a.exe N/A

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\IXP000.TMP\SETUP_~1.EXE N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\SETUP_~1.EXE N/A

Processes

C:\Users\Admin\AppData\Local\Temp\7d41dd6194db2b9b1514ad154451bb7a.exe

"C:\Users\Admin\AppData\Local\Temp\7d41dd6194db2b9b1514ad154451bb7a.exe"

C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\SETUP_~1.EXE

C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\SETUP_~1.EXE

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3168 -ip 3168

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3168 -s 1688

Network

Country Destination Domain Proto
US 8.8.8.8:53 83.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.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 megalinkbj.com.br udp
US 162.250.125.14:443 megalinkbj.com.br tcp
US 8.8.8.8:53 14.125.250.162.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 197.87.175.4.in-addr.arpa udp
US 8.8.8.8:53 241.42.69.40.in-addr.arpa udp
US 8.8.8.8:53 75.117.19.2.in-addr.arpa udp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp

Files

memory/3168-5-0x00000000750AE000-0x00000000750AF000-memory.dmp

memory/3168-6-0x0000000000A20000-0x0000000000A28000-memory.dmp

memory/3168-7-0x00000000750A0000-0x0000000075850000-memory.dmp

memory/3168-8-0x00000000750A0000-0x0000000075850000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-08 01:46

Reported

2024-11-08 01:49

Platform

win7-20240903-en

Max time kernel

134s

Max time network

143s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2870a473e49673e2f6feb3d6e0792de6.exe"

Signatures

N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2870a473e49673e2f6feb3d6e0792de6.exe

"C:\Users\Admin\AppData\Local\Temp\2870a473e49673e2f6feb3d6e0792de6.exe"

Network

Country Destination Domain Proto
NL 217.195.155.154:8081 tcp
NL 217.195.155.154:8081 tcp
NL 217.195.155.154:8081 tcp
NL 217.195.155.154:8081 tcp
NL 217.195.155.154:8081 tcp
NL 217.195.155.154:8081 tcp
NL 217.195.155.154:8081 tcp

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-08 01:46

Reported

2024-11-08 01:49

Platform

win10v2004-20241007-en

Max time kernel

150s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2870a473e49673e2f6feb3d6e0792de6.exe"

Signatures

N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2870a473e49673e2f6feb3d6e0792de6.exe

"C:\Users\Admin\AppData\Local\Temp\2870a473e49673e2f6feb3d6e0792de6.exe"

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 58.55.71.13.in-addr.arpa udp
NL 217.195.155.154:8081 tcp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 134.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
NL 217.195.155.154:8081 tcp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 212.20.149.52.in-addr.arpa udp
NL 217.195.155.154:8081 tcp
NL 217.195.155.154:8081 tcp
NL 217.195.155.154:8081 tcp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
NL 217.195.155.154:8081 tcp
NL 217.195.155.154:8081 tcp
US 8.8.8.8:53 215.143.182.52.in-addr.arpa udp

Files

N/A

Analysis: behavioral3

Detonation Overview

Submitted

2024-11-08 01:46

Reported

2024-11-08 01:49

Platform

win7-20240708-en

Max time kernel

119s

Max time network

120s

Command Line

"C:\Users\Admin\AppData\Local\Temp\5b198d1272b07fa5c8880604f17a4d65.exe"

Signatures

N/A

Processes

C:\Users\Admin\AppData\Local\Temp\5b198d1272b07fa5c8880604f17a4d65.exe

"C:\Users\Admin\AppData\Local\Temp\5b198d1272b07fa5c8880604f17a4d65.exe"

Network

N/A

Files

N/A