purecrypter | c2194401e99bfeeb2f01be021903879abb3b9679d50da5a528619a4bee314d57

General

Target

CPU-Z.exe
Size

683.7MB
MD5

3cdb58d52e9b7c5ca06ff327d8010f9a
SHA1

add127cbecef9f393ae0a40f7c17c84adb5c5b5f
SHA256

297266aaa8d272f87c66e3ac63e58aa9411718eb75cab08f90ee1c64c099ed94
SHA512

8fbeaf7c2e0dfbfe0f75f77c8f2e7ab000db07c5b603c9e3f8ac215e23cf5009adf118027589a18665c54431df35454811cc2e4a3ba7af6379723342cf4cbc26
SSDEEP

1536:tDy0zIjGWZXMig6NCDZq68SVciCz9WkngFSc6gJN+80+3vIDix1oHwJ:E0zAGWzboWiBjNl+8/7x2K

Score

10^/10

purecrypter vidar 682 discovery downloader loader spyware stealer

Malware Config

Extracted

Family

vidar

Version

2.3

Botnet

682

C2

http://46.151.26.234:80

Attributes

profile_id
682

Signatures

Detect PureCrypter injector 1 IoCs

loader

Processes:

resource	yara_rule
behavioral1/memory/1492-56-0x0000000006240000-0x00000000064D4000-memory.dmp	family_purecrypter

PureCrypter
PureCrypter is a .NET malware loader first seen in early 2021.
loader downloader purecrypter
Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar
Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

884 cmd.exe
Loads dropped DLL 2 IoCs

Processes:

CPU-Z.exe

pid process

1984 CPU-Z.exe
1984 CPU-Z.exe
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 2FA software files, possible credential harvesting 2 TTPs
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
Suspicious use of SetThreadContext 1 IoCs

Processes:

CPU-Z.exe

description pid process target process

PID 1492 set thread context of 1984 1492 CPU-Z.exe CPU-Z.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

pid	process
884	cmd.exe

pid	process
1984	CPU-Z.exe
1984	CPU-Z.exe

description	pid	process	target process
PID 1492 set thread context of 1984	1492	CPU-Z.exe	CPU-Z.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:

CPU-Z.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	CPU-Z.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	CPU-Z.exe

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

1652 timeout.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

CPU-Z.exe

pid process

1984 CPU-Z.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

CPU-Z.exe

description pid process

Token: SeDebugPrivilege 1492 CPU-Z.exe

pid	process
1652	timeout.exe

pid	process
1984	CPU-Z.exe

description	pid	process
Token: SeDebugPrivilege	1492	CPU-Z.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

CPU-Z.exeCPU-Z.execmd.exe

description	pid	process	target process
PID 1492 wrote to memory of 1984	1492	CPU-Z.exe	CPU-Z.exe
PID 1492 wrote to memory of 1984	1492	CPU-Z.exe	CPU-Z.exe
PID 1492 wrote to memory of 1984	1492	CPU-Z.exe	CPU-Z.exe
PID 1492 wrote to memory of 1984	1492	CPU-Z.exe	CPU-Z.exe
PID 1492 wrote to memory of 1984	1492	CPU-Z.exe	CPU-Z.exe
PID 1492 wrote to memory of 1984	1492	CPU-Z.exe	CPU-Z.exe
PID 1492 wrote to memory of 1984	1492	CPU-Z.exe	CPU-Z.exe
PID 1492 wrote to memory of 1984	1492	CPU-Z.exe	CPU-Z.exe
PID 1492 wrote to memory of 1984	1492	CPU-Z.exe	CPU-Z.exe
PID 1492 wrote to memory of 1984	1492	CPU-Z.exe	CPU-Z.exe
PID 1984 wrote to memory of 884	1984	CPU-Z.exe	cmd.exe
PID 1984 wrote to memory of 884	1984	CPU-Z.exe	cmd.exe
PID 1984 wrote to memory of 884	1984	CPU-Z.exe	cmd.exe
PID 1984 wrote to memory of 884	1984	CPU-Z.exe	cmd.exe
PID 884 wrote to memory of 1652	884	cmd.exe	timeout.exe
PID 884 wrote to memory of 1652	884	cmd.exe	timeout.exe
PID 884 wrote to memory of 1652	884	cmd.exe	timeout.exe
PID 884 wrote to memory of 1652	884	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\CPU-Z.exe
"C:\Users\Admin\AppData\Local\Temp\CPU-Z.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1492

C:\Users\Admin\AppData\Local\Temp\CPU-Z.exe
C:\Users\Admin\AppData\Local\Temp\CPU-Z.exe
2⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1984

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\CPU-Z.exe" & exit
3⤵
- Deletes itself
- Suspicious use of WriteProcessMemory
PID:884

C:\Windows\SysWOW64\timeout.exe
timeout /t 6
4⤵
- Delays execution with timeout.exe
PID:1652

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

3

T1081

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

3

T1005

Exfiltration

Command and Control

Impact

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Downloads

\ProgramData\mozglue.dll
Filesize
593KB

MD5
c8fd9be83bc728cc04beffafc2907fe9

SHA1
95ab9f701e0024cedfbd312bcfe4e726744c4f2e

SHA256
ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

SHA512
fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

Download Submit
\ProgramData\nss3.dll
Filesize
2.0MB

MD5
1cc453cdf74f31e4d913ff9c10acdde2

SHA1
6e85eae544d6e965f15fa5c39700fa7202f3aafe

SHA256
ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

SHA512
dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

Download Submit
memory/884-94-0x0000000000000000-mapping.dmp

Download
memory/1492-55-0x0000000075921000-0x0000000075923000-memory.dmp

Filesize
8KB

Download
memory/1492-56-0x0000000006240000-0x00000000064D4000-memory.dmp

Filesize
2.6MB

Download
memory/1492-57-0x0000000005250000-0x00000000052BE000-memory.dmp

Filesize
440KB

Download
memory/1492-54-0x0000000000D80000-0x0000000000D9E000-memory.dmp

Filesize
120KB

Download
memory/1652-96-0x0000000000000000-mapping.dmp

Download
memory/1984-59-0x0000000000400000-0x0000000000471000-memory.dmp

Filesize
452KB

Download
memory/1984-67-0x0000000000400000-0x0000000000471000-memory.dmp

Filesize
452KB

Download
memory/1984-68-0x0000000000431C9C-mapping.dmp

Download
memory/1984-70-0x0000000000400000-0x0000000000471000-memory.dmp

Filesize
452KB

Download
memory/1984-72-0x0000000000400000-0x0000000000471000-memory.dmp

Filesize
452KB

Download
memory/1984-73-0x0000000050C90000-0x0000000050D83000-memory.dmp

Filesize
972KB

Download
memory/1984-65-0x0000000000400000-0x0000000000471000-memory.dmp

Filesize
452KB

Download
memory/1984-63-0x0000000000400000-0x0000000000471000-memory.dmp

Filesize
452KB

Download
memory/1984-93-0x0000000000400000-0x0000000000471000-memory.dmp

Filesize
452KB

Download
memory/1984-61-0x0000000000400000-0x0000000000471000-memory.dmp

Filesize
452KB

Download
memory/1984-95-0x0000000000400000-0x0000000000471000-memory.dmp

Filesize
452KB

Download
memory/1984-58-0x0000000000400000-0x0000000000471000-memory.dmp

Filesize
452KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads