purecrypter | 9dcb2a2b604e475d5cfbb2c3e3a87a74ff91336173e9ef5edfa14a26402709c6

General

Target

QUOTATION#012523.exe
Size

1.1MB
MD5

81d8d0e132cc1fe211b6f16a92e135aa
SHA1

985e43ecf4aa037c23cff2d759f1f2d24e1adbf7
SHA256

9dcb2a2b604e475d5cfbb2c3e3a87a74ff91336173e9ef5edfa14a26402709c6
SHA512

4e6fd1fe78998274712398aa7a290a990a07ed2c0cab6b3862a8021ab7f39e35459d61da94b8614bc51257dbbc73e7f1493f3b144bac17a91fa6da2a5d664964
SSDEEP

24576:FZEbyAkdLTLRBoTTB+DeU4FxgsilaxUA1Cm0f8vt/0Nd:FzLNY/gLlar1F0E

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/1320-55-0x0000000004810000-0x0000000004912000-memory.dmp	family_purecrypter

PureCrypter
PureCrypter is a .NET malware loader first seen in early 2021.
loader downloader purecrypter
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:

QUOTATION#012523.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	QUOTATION#012523.exe
Key opened	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	QUOTATION#012523.exe
Key opened	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	QUOTATION#012523.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

QUOTATION#012523.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\Yaqzhnpjop = "\"C:\\Users\\Admin\\AppData\\Roaming\\Btadm\\Yaqzhnpjop.exe\""	QUOTATION#012523.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Suspicious use of SetThreadContext 1 IoCs

Processes:

QUOTATION#012523.exe

description pid process target process

PID 1320 set thread context of 284 1320 QUOTATION#012523.exe QUOTATION#012523.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

428 284 WerFault.exe QUOTATION#012523.exe

description	pid	process	target process
PID 1320 set thread context of 284	1320	QUOTATION#012523.exe	QUOTATION#012523.exe

pid	pid_target	process	target process
428	284	WerFault.exe	QUOTATION#012523.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

QUOTATION#012523.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	QUOTATION#012523.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	QUOTATION#012523.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

powershell.exe

pid process

1292 powershell.exe

pid	process
1292	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

powershell.exeQUOTATION#012523.exeQUOTATION#012523.exe

description	pid	process
Token: SeDebugPrivilege	1292	powershell.exe
Token: SeDebugPrivilege	1320	QUOTATION#012523.exe
Token: SeDebugPrivilege	284	QUOTATION#012523.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

QUOTATION#012523.exeQUOTATION#012523.exe

description	pid	process	target process
PID 1320 wrote to memory of 1292	1320	QUOTATION#012523.exe	powershell.exe
PID 1320 wrote to memory of 1292	1320	QUOTATION#012523.exe	powershell.exe
PID 1320 wrote to memory of 1292	1320	QUOTATION#012523.exe	powershell.exe
PID 1320 wrote to memory of 1292	1320	QUOTATION#012523.exe	powershell.exe
PID 1320 wrote to memory of 284	1320	QUOTATION#012523.exe	QUOTATION#012523.exe
PID 1320 wrote to memory of 284	1320	QUOTATION#012523.exe	QUOTATION#012523.exe
PID 1320 wrote to memory of 284	1320	QUOTATION#012523.exe	QUOTATION#012523.exe
PID 1320 wrote to memory of 284	1320	QUOTATION#012523.exe	QUOTATION#012523.exe
PID 1320 wrote to memory of 284	1320	QUOTATION#012523.exe	QUOTATION#012523.exe
PID 1320 wrote to memory of 284	1320	QUOTATION#012523.exe	QUOTATION#012523.exe
PID 1320 wrote to memory of 284	1320	QUOTATION#012523.exe	QUOTATION#012523.exe
PID 1320 wrote to memory of 284	1320	QUOTATION#012523.exe	QUOTATION#012523.exe
PID 1320 wrote to memory of 284	1320	QUOTATION#012523.exe	QUOTATION#012523.exe
PID 284 wrote to memory of 428	284	QUOTATION#012523.exe	WerFault.exe
PID 284 wrote to memory of 428	284	QUOTATION#012523.exe	WerFault.exe
PID 284 wrote to memory of 428	284	QUOTATION#012523.exe	WerFault.exe
PID 284 wrote to memory of 428	284	QUOTATION#012523.exe	WerFault.exe

outlook_office_path 1 IoCs

Processes:

QUOTATION#012523.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	QUOTATION#012523.exe

outlook_win_path 1 IoCs

Processes:

QUOTATION#012523.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	QUOTATION#012523.exe

C:\Users\Admin\AppData\Local\Temp\QUOTATION#012523.exe
"C:\Users\Admin\AppData\Local\Temp\QUOTATION#012523.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1320

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:1292

C:\Users\Admin\AppData\Local\Temp\QUOTATION#012523.exe
C:\Users\Admin\AppData\Local\Temp\QUOTATION#012523.exe
2⤵
- Accesses Microsoft Outlook profiles
- Checks processor information in registry
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- outlook_office_path
- outlook_win_path
PID:284

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 284 -s 1876
3⤵
- Program crash
PID:428

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

1

T1081

Discovery

System Information Discovery

2

T1082

Query Registry

1

T1012

Lateral Movement

Collection

Data from Local System

1

T1005

Email Collection

1

T1114

Exfiltration

Command and Control

Web Service

1

T1102

Impact

Replay Monitor

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Downloads

memory/284-68-0x0000000000400000-0x00000000004C2000-memory.dmp

Filesize
776KB

Download
memory/284-67-0x0000000000400000-0x00000000004C2000-memory.dmp

Filesize
776KB

Download
memory/284-63-0x0000000000400000-0x00000000004C2000-memory.dmp

Filesize
776KB

Download
memory/284-64-0x0000000000400000-0x00000000004C2000-memory.dmp

Filesize
776KB

Download
memory/284-76-0x00000000085A0000-0x0000000008652000-memory.dmp

Filesize
712KB

Download
memory/284-75-0x0000000000B00000-0x0000000000B0E000-memory.dmp

Filesize
56KB

Download
memory/284-73-0x0000000000400000-0x00000000004C2000-memory.dmp

Filesize
776KB

Download
memory/284-71-0x0000000000400000-0x00000000004C2000-memory.dmp

Filesize
776KB

Download
memory/284-69-0x00000000004BC40E-mapping.dmp

Download
memory/284-66-0x0000000000400000-0x00000000004C2000-memory.dmp

Filesize
776KB

Download
memory/428-77-0x0000000000000000-mapping.dmp

Download
memory/1292-62-0x000000006EE00000-0x000000006F3AB000-memory.dmp

Filesize
5.7MB

Download
memory/1292-61-0x000000006EE00000-0x000000006F3AB000-memory.dmp

Filesize
5.7MB

Download
memory/1292-60-0x000000006EE00000-0x000000006F3AB000-memory.dmp

Filesize
5.7MB

Download
memory/1292-58-0x0000000000000000-mapping.dmp

Download
memory/1320-55-0x0000000004810000-0x0000000004912000-memory.dmp

Filesize
1.0MB

Download
memory/1320-54-0x0000000001010000-0x000000000113C000-memory.dmp

Filesize
1.2MB

Download
memory/1320-56-0x0000000004CF0000-0x0000000004D82000-memory.dmp

Filesize
584KB

Download
memory/1320-57-0x0000000075D01000-0x0000000075D03000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads