purecrypter | 85420ddd075768164031bf43563925bff88c5b298d7924ca95fe1cb0519dd76b

Analysis

max time kernel
130s
max time network
137s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
01-02-2023 13:17

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General

Target

5f0445d82f2f59d66d74df0f321bcd63023a87c5.exe
Size

6KB
MD5

1b7fda525abb7145a0cf5099a2bb0124
SHA1

5f0445d82f2f59d66d74df0f321bcd63023a87c5
SHA256

85420ddd075768164031bf43563925bff88c5b298d7924ca95fe1cb0519dd76b
SHA512

8e212b39215328bac75782340957ac71b3fb22f444f7ad18b14eae1a483c0413e870b677cfb48e850a9c4cc5ef182e6d1ae796d4bb7cbaf16446983c06a0d5b1
SSDEEP

96:rmc26N/JsNp8syjxQbw3kBFWkhL6CFRQt15vr3F6JNQikFtCaX/BzNt:rfJRW8HxswUnWaL6YG5vDMoFbX/D

Score

10^/10

purecrypter downloader loader

Malware Config

Extracted

Family

purecrypter

http://194.180.49.17/Pruwgxlsz.bmp

Signatures

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

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{5CB9CB67-16F7-442D-93EC-B3F90C461C14}.catalogItem	svchost.exe
File created	C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{D3A58C0D-48C9-4C45-9BA6-DD86905DA237}.catalogItem	svchost.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4180	1152	WerFault.exe	74

Checks processor information in registry 2 TTPs 3 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	svchost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	svchost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	svchost.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	svchost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	svchost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1152	5f0445d82f2f59d66d74df0f321bcd63023a87c5.exe

C:\Users\Admin\AppData\Local\Temp\5f0445d82f2f59d66d74df0f321bcd63023a87c5.exe
"C:\Users\Admin\AppData\Local\Temp\5f0445d82f2f59d66d74df0f321bcd63023a87c5.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1152
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1152 -s 1692
  2⤵
  - Program crash
  PID:4180

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k netsvcs -p
1⤵
- Drops file in System32 directory
- Checks processor information in registry
- Enumerates system info in registry
PID:4692

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 1152 -ip 1152
1⤵
PID:4256

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1152-132-0x0000000000680000-0x0000000000688000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads