Malware Analysis Report

2024-11-30 21:48

Sample ID 230213-h629yabf79
Target e1614217a227ee00d452c21059af1d4572420cd6079d384ec265e2b1a5192f90
SHA256 e1614217a227ee00d452c21059af1d4572420cd6079d384ec265e2b1a5192f90
Tags
purecrypter downloader loader persistence
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

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

e1614217a227ee00d452c21059af1d4572420cd6079d384ec265e2b1a5192f90

Threat Level: Known bad

The file e1614217a227ee00d452c21059af1d4572420cd6079d384ec265e2b1a5192f90 was found to be: Known bad.

Malicious Activity Summary

purecrypter downloader loader persistence

Purecrypter family

PureCrypter

Checks computer location settings

Adds Run key to start application

Suspicious use of SetThreadContext

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-02-13 07:21

Signatures

Purecrypter family

purecrypter

Analysis: behavioral1

Detonation Overview

Submitted

2023-02-13 07:21

Reported

2023-02-13 07:22

Platform

win7-20221111-en

Max time kernel

31s

Max time network

10s

Command Line

"C:\Users\Admin\AppData\Local\Temp\e1614217a227ee00d452c21059af1d4572420cd6079d384ec265e2b1a5192f90.exe"

Signatures

PureCrypter

loader downloader purecrypter

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\e1614217a227ee00d452c21059af1d4572420cd6079d384ec265e2b1a5192f90.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\e1614217a227ee00d452c21059af1d4572420cd6079d384ec265e2b1a5192f90.exe

"C:\Users\Admin\AppData\Local\Temp\e1614217a227ee00d452c21059af1d4572420cd6079d384ec265e2b1a5192f90.exe"

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==

Network

Country Destination Domain Proto
US 163.123.142.210:80 163.123.142.210 tcp

Files

memory/1540-54-0x000000013F290000-0x000000013F29E000-memory.dmp

memory/1540-55-0x000000001C8A0000-0x000000001C9BC000-memory.dmp

memory/1540-56-0x000000001AA20000-0x000000001AAA4000-memory.dmp

memory/916-57-0x0000000000000000-mapping.dmp

memory/916-58-0x000007FEFC091000-0x000007FEFC093000-memory.dmp

memory/916-59-0x000007FEEBBC0000-0x000007FEEC5E3000-memory.dmp

memory/916-60-0x000007FEEB060000-0x000007FEEBBBD000-memory.dmp

memory/916-61-0x00000000029B4000-0x00000000029B7000-memory.dmp

memory/916-62-0x000000001B710000-0x000000001BA0F000-memory.dmp

memory/916-63-0x00000000029BB000-0x00000000029DA000-memory.dmp

memory/916-64-0x00000000029B4000-0x00000000029B7000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-02-13 07:21

Reported

2023-02-13 07:24

Platform

win10v2004-20221111-en

Max time kernel

112s

Max time network

116s

Command Line

"C:\Users\Admin\AppData\Local\Temp\e1614217a227ee00d452c21059af1d4572420cd6079d384ec265e2b1a5192f90.exe"

Signatures

PureCrypter

loader downloader purecrypter

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\e1614217a227ee00d452c21059af1d4572420cd6079d384ec265e2b1a5192f90.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Vokaupcde = "\"C:\\Users\\Admin\\AppData\\Roaming\\Rrlirudzf\\Vokaupcde.exe\"" C:\Users\Admin\AppData\Local\Temp\e1614217a227ee00d452c21059af1d4572420cd6079d384ec265e2b1a5192f90.exe N/A

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2728 wrote to memory of 996 N/A C:\Users\Admin\AppData\Local\Temp\e1614217a227ee00d452c21059af1d4572420cd6079d384ec265e2b1a5192f90.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2728 wrote to memory of 996 N/A C:\Users\Admin\AppData\Local\Temp\e1614217a227ee00d452c21059af1d4572420cd6079d384ec265e2b1a5192f90.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2728 wrote to memory of 5040 N/A C:\Users\Admin\AppData\Local\Temp\e1614217a227ee00d452c21059af1d4572420cd6079d384ec265e2b1a5192f90.exe C:\Users\Admin\AppData\Local\Temp\e1614217a227ee00d452c21059af1d4572420cd6079d384ec265e2b1a5192f90.exe
PID 2728 wrote to memory of 5040 N/A C:\Users\Admin\AppData\Local\Temp\e1614217a227ee00d452c21059af1d4572420cd6079d384ec265e2b1a5192f90.exe C:\Users\Admin\AppData\Local\Temp\e1614217a227ee00d452c21059af1d4572420cd6079d384ec265e2b1a5192f90.exe
PID 2728 wrote to memory of 5040 N/A C:\Users\Admin\AppData\Local\Temp\e1614217a227ee00d452c21059af1d4572420cd6079d384ec265e2b1a5192f90.exe C:\Users\Admin\AppData\Local\Temp\e1614217a227ee00d452c21059af1d4572420cd6079d384ec265e2b1a5192f90.exe
PID 2728 wrote to memory of 5040 N/A C:\Users\Admin\AppData\Local\Temp\e1614217a227ee00d452c21059af1d4572420cd6079d384ec265e2b1a5192f90.exe C:\Users\Admin\AppData\Local\Temp\e1614217a227ee00d452c21059af1d4572420cd6079d384ec265e2b1a5192f90.exe
PID 2728 wrote to memory of 5040 N/A C:\Users\Admin\AppData\Local\Temp\e1614217a227ee00d452c21059af1d4572420cd6079d384ec265e2b1a5192f90.exe C:\Users\Admin\AppData\Local\Temp\e1614217a227ee00d452c21059af1d4572420cd6079d384ec265e2b1a5192f90.exe
PID 2728 wrote to memory of 5040 N/A C:\Users\Admin\AppData\Local\Temp\e1614217a227ee00d452c21059af1d4572420cd6079d384ec265e2b1a5192f90.exe C:\Users\Admin\AppData\Local\Temp\e1614217a227ee00d452c21059af1d4572420cd6079d384ec265e2b1a5192f90.exe

Processes

C:\Users\Admin\AppData\Local\Temp\e1614217a227ee00d452c21059af1d4572420cd6079d384ec265e2b1a5192f90.exe

"C:\Users\Admin\AppData\Local\Temp\e1614217a227ee00d452c21059af1d4572420cd6079d384ec265e2b1a5192f90.exe"

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==

C:\Users\Admin\AppData\Local\Temp\e1614217a227ee00d452c21059af1d4572420cd6079d384ec265e2b1a5192f90.exe

C:\Users\Admin\AppData\Local\Temp\e1614217a227ee00d452c21059af1d4572420cd6079d384ec265e2b1a5192f90.exe

Network

Country Destination Domain Proto
US 163.123.142.210:80 163.123.142.210 tcp
US 93.184.221.240:80 tcp
US 93.184.221.240:80 tcp
NL 104.80.225.205:443 tcp
IT 179.43.155.202:9090 tcp
NL 8.253.208.121:80 tcp
NL 8.253.208.121:80 tcp
IT 179.43.155.202:9091 tcp
IT 179.43.155.202:9092 tcp
IT 179.43.155.202:8444 tcp

Files

memory/2728-132-0x000002238A300000-0x000002238A30E000-memory.dmp

memory/2728-133-0x00007FFA61D30000-0x00007FFA627F1000-memory.dmp

memory/2728-134-0x00000223A58D0000-0x00000223A58F2000-memory.dmp

memory/996-135-0x0000000000000000-mapping.dmp

memory/996-136-0x00007FFA61D30000-0x00007FFA627F1000-memory.dmp

memory/2728-137-0x00007FFA61D30000-0x00007FFA627F1000-memory.dmp

memory/996-138-0x00007FFA61D30000-0x00007FFA627F1000-memory.dmp

memory/996-139-0x00007FFA61D30000-0x00007FFA627F1000-memory.dmp

memory/5040-141-0x0000000000400000-mapping.dmp

memory/5040-140-0x0000000000400000-0x000000000048C000-memory.dmp

memory/5040-142-0x00007FFA61D30000-0x00007FFA627F1000-memory.dmp

memory/2728-143-0x00007FFA61D30000-0x00007FFA627F1000-memory.dmp

memory/5040-144-0x00007FFA61D30000-0x00007FFA627F1000-memory.dmp