purecrypter | f90d2b7322438acc8decf28392f29916b9b87ce99072f867d3e278ce6fc295fb

General

Target

Product presentation.exe
Size

1.2MB
MD5

d81ed82ea53f8e56bb98eaaef98f4d80
SHA1

01d76f1b404b125a7b8bf3f3829101124965ad9a
SHA256

f90d2b7322438acc8decf28392f29916b9b87ce99072f867d3e278ce6fc295fb
SHA512

49b6b1306d27cf347673c2e8641ea377a941b0f2689e648130fe28fbc7e519a8744b61a9d2635c800c2074af148ff41d6bc2093aa1b73e98670a7aab135f6a3f
SSDEEP

24576:QpbnahUHVL9XoveLj48xCbGmx31VprkdhVKfhoyNDjgGKySlXYrZSD:QpuKHXLU8kb11/JeyNDjgxySeZSD

Score

10^/10

purecrypter collection downloader loader persistence spyware stealer

Malware Config

Signatures

Detect PureCrypter injector 1 IoCs

loader

resource	yara_rule
behavioral1/memory/2024-55-0x0000000004E50000-0x00000000050C0000-memory.dmp	family_purecrypter

PureCrypter
PureCrypter is a .NET malware loader first seen in early 2021.
loader downloader purecrypter
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Product presentation.exe
Key opened	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Product presentation.exe
Key opened	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Product presentation.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\Sxvtzhi = "\"C:\\Users\\Admin\\AppData\\Roaming\\Wklnwuncgsj\\Sxvtzhi.exe\""	Product presentation.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2024 set thread context of 820	2024	Product presentation.exe	29

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1732	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2024	Product presentation.exe
Token: SeDebugPrivilege	1732	powershell.exe
Token: SeDebugPrivilege	820	Product presentation.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 2024 wrote to memory of 1732	2024	Product presentation.exe	27
PID 2024 wrote to memory of 1732	2024	Product presentation.exe	27
PID 2024 wrote to memory of 1732	2024	Product presentation.exe	27
PID 2024 wrote to memory of 1732	2024	Product presentation.exe	27
PID 2024 wrote to memory of 820	2024	Product presentation.exe	29
PID 2024 wrote to memory of 820	2024	Product presentation.exe	29
PID 2024 wrote to memory of 820	2024	Product presentation.exe	29
PID 2024 wrote to memory of 820	2024	Product presentation.exe	29
PID 2024 wrote to memory of 820	2024	Product presentation.exe	29
PID 2024 wrote to memory of 820	2024	Product presentation.exe	29
PID 2024 wrote to memory of 820	2024	Product presentation.exe	29
PID 2024 wrote to memory of 820	2024	Product presentation.exe	29
PID 2024 wrote to memory of 820	2024	Product presentation.exe	29

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Product presentation.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Product presentation.exe

C:\Users\Admin\AppData\Local\Temp\Product presentation.exe
"C:\Users\Admin\AppData\Local\Temp\Product presentation.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2024
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1732
- C:\Users\Admin\AppData\Local\Temp\Product presentation.exe
  "C:\Users\Admin\AppData\Local\Temp\Product presentation.exe"
  2⤵
  - Accesses Microsoft Outlook profiles
  - Suspicious use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:820

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials in Files

3

T1081

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/820-68-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/820-66-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/820-73-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/820-71-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/820-67-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/820-63-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/820-64-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1732-61-0x000000006FEB0000-0x000000007045B000-memory.dmp

Filesize
5.7MB

Download
memory/1732-60-0x000000006FEB0000-0x000000007045B000-memory.dmp

Filesize
5.7MB

Download
memory/1732-59-0x000000006FEB0000-0x000000007045B000-memory.dmp

Filesize
5.7MB

Download
memory/2024-55-0x0000000004E50000-0x00000000050C0000-memory.dmp

Filesize
2.4MB

Download
memory/2024-62-0x0000000004D80000-0x0000000004DD4000-memory.dmp

Filesize
336KB

Download
memory/2024-54-0x0000000000B50000-0x0000000000C8C000-memory.dmp

Filesize
1.2MB

Download
memory/2024-56-0x00000000766D1000-0x00000000766D3000-memory.dmp

Filesize
8KB

Download

Analysis

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