purecrypter | f33f2b0823a6b41f1632f5d19ebe4d144375781702b3f7b544c6321937f28161

General

Target

e453ee4e1a1a3c97ebab67171893ae7f.exe
Size

2.4MB
MD5

e453ee4e1a1a3c97ebab67171893ae7f
SHA1

b4c24de8784bb530d549ed1df3716f2640e52d79
SHA256

f33f2b0823a6b41f1632f5d19ebe4d144375781702b3f7b544c6321937f28161
SHA512

d90c6a7b92779478082592af1ff6b378dca8f6469c6a38f4445938ee3b82123a8c578e07392a0f767f76712fa158a9d57988adb4723baccf48724a47fe0921de
SSDEEP

49152:bRPs+XkKb9mSewZPhGDcUovKdd+hHHafaQG0:dPD/tFKdd+ZafaZ0

Score

10^/10

purecrypter collection downloader loader persistence spyware stealer

Malware Config

Signatures

Detect PureCrypter injector 1 IoCs

loader

Processes:

resource	yara_rule
behavioral1/memory/832-55-0x0000000004B20000-0x0000000004D90000-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

Processes:

e453ee4e1a1a3c97ebab67171893ae7f.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	e453ee4e1a1a3c97ebab67171893ae7f.exe
Key opened	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	e453ee4e1a1a3c97ebab67171893ae7f.exe
Key opened	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	e453ee4e1a1a3c97ebab67171893ae7f.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

e453ee4e1a1a3c97ebab67171893ae7f.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\Ionqujnzumi = "\"C:\\Users\\Admin\\AppData\\Roaming\\Cqqhucv\\Ionqujnzumi.exe\""	e453ee4e1a1a3c97ebab67171893ae7f.exe

Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

3 api.ipify.org
4 api.ipify.org
Suspicious use of SetThreadContext 1 IoCs

Processes:

e453ee4e1a1a3c97ebab67171893ae7f.exe

description pid process target process

PID 832 set thread context of 1308 832 e453ee4e1a1a3c97ebab67171893ae7f.exe e453ee4e1a1a3c97ebab67171893ae7f.exe
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

Processes:

powershell.exe

pid process

2028 powershell.exe

flow	ioc
3	api.ipify.org
4	api.ipify.org

description	pid	process	target process
PID 832 set thread context of 1308	832	e453ee4e1a1a3c97ebab67171893ae7f.exe	e453ee4e1a1a3c97ebab67171893ae7f.exe

pid	process
2028	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

e453ee4e1a1a3c97ebab67171893ae7f.exepowershell.exee453ee4e1a1a3c97ebab67171893ae7f.exe

description	pid	process
Token: SeDebugPrivilege	832	e453ee4e1a1a3c97ebab67171893ae7f.exe
Token: SeDebugPrivilege	2028	powershell.exe
Token: SeDebugPrivilege	1308	e453ee4e1a1a3c97ebab67171893ae7f.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

e453ee4e1a1a3c97ebab67171893ae7f.exe

pid process

1308 e453ee4e1a1a3c97ebab67171893ae7f.exe

pid	process
1308	e453ee4e1a1a3c97ebab67171893ae7f.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

e453ee4e1a1a3c97ebab67171893ae7f.exe

description	pid	process	target process
PID 832 wrote to memory of 2028	832	e453ee4e1a1a3c97ebab67171893ae7f.exe	powershell.exe
PID 832 wrote to memory of 2028	832	e453ee4e1a1a3c97ebab67171893ae7f.exe	powershell.exe
PID 832 wrote to memory of 2028	832	e453ee4e1a1a3c97ebab67171893ae7f.exe	powershell.exe
PID 832 wrote to memory of 2028	832	e453ee4e1a1a3c97ebab67171893ae7f.exe	powershell.exe
PID 832 wrote to memory of 1308	832	e453ee4e1a1a3c97ebab67171893ae7f.exe	e453ee4e1a1a3c97ebab67171893ae7f.exe
PID 832 wrote to memory of 1308	832	e453ee4e1a1a3c97ebab67171893ae7f.exe	e453ee4e1a1a3c97ebab67171893ae7f.exe
PID 832 wrote to memory of 1308	832	e453ee4e1a1a3c97ebab67171893ae7f.exe	e453ee4e1a1a3c97ebab67171893ae7f.exe
PID 832 wrote to memory of 1308	832	e453ee4e1a1a3c97ebab67171893ae7f.exe	e453ee4e1a1a3c97ebab67171893ae7f.exe
PID 832 wrote to memory of 1308	832	e453ee4e1a1a3c97ebab67171893ae7f.exe	e453ee4e1a1a3c97ebab67171893ae7f.exe
PID 832 wrote to memory of 1308	832	e453ee4e1a1a3c97ebab67171893ae7f.exe	e453ee4e1a1a3c97ebab67171893ae7f.exe
PID 832 wrote to memory of 1308	832	e453ee4e1a1a3c97ebab67171893ae7f.exe	e453ee4e1a1a3c97ebab67171893ae7f.exe
PID 832 wrote to memory of 1308	832	e453ee4e1a1a3c97ebab67171893ae7f.exe	e453ee4e1a1a3c97ebab67171893ae7f.exe
PID 832 wrote to memory of 1308	832	e453ee4e1a1a3c97ebab67171893ae7f.exe	e453ee4e1a1a3c97ebab67171893ae7f.exe

outlook_office_path 1 IoCs

Processes:

e453ee4e1a1a3c97ebab67171893ae7f.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	e453ee4e1a1a3c97ebab67171893ae7f.exe

outlook_win_path 1 IoCs

Processes:

e453ee4e1a1a3c97ebab67171893ae7f.exe

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	e453ee4e1a1a3c97ebab67171893ae7f.exe

C:\Users\Admin\AppData\Local\Temp\e453ee4e1a1a3c97ebab67171893ae7f.exe
"C:\Users\Admin\AppData\Local\Temp\e453ee4e1a1a3c97ebab67171893ae7f.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:832

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:2028

C:\Users\Admin\AppData\Local\Temp\e453ee4e1a1a3c97ebab67171893ae7f.exe
C:\Users\Admin\AppData\Local\Temp\e453ee4e1a1a3c97ebab67171893ae7f.exe
2⤵
- Accesses Microsoft Outlook profiles
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- outlook_office_path
- outlook_win_path
PID:1308

Network

MITRE ATT&CK Matrix ATT&CK 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

3

T1005

Email Collection

1

T1114

Exfiltration

Command and Control

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/832-62-0x0000000004970000-0x00000000049C4000-memory.dmp

Filesize
336KB

Download
memory/832-55-0x0000000004B20000-0x0000000004D90000-memory.dmp

Filesize
2.4MB

Download
memory/832-56-0x0000000076BA1000-0x0000000076BA3000-memory.dmp

Filesize
8KB

Download
memory/832-54-0x0000000000AA0000-0x0000000000D12000-memory.dmp

Filesize
2.4MB

Download
memory/1308-68-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1308-63-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1308-64-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1308-66-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1308-67-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1308-69-0x000000000042AAFE-mapping.dmp

Download
memory/1308-71-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1308-73-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2028-60-0x0000000070030000-0x00000000705DB000-memory.dmp

Filesize
5.7MB

Download
memory/2028-61-0x0000000070030000-0x00000000705DB000-memory.dmp

Filesize
5.7MB

Download
memory/2028-59-0x0000000070030000-0x00000000705DB000-memory.dmp

Filesize
5.7MB

Download
memory/2028-57-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

Loading Replay Monitor...

Downloads