purecrypter | 03541b2cf3bf022eda584b9ead6b6edeb7a47e8ccaa99b2415ee56694c9868cb

General

Target

tmp.exe
Size

2.7MB
MD5

21605edd439a91f69b7c2584413ae3f5
SHA1

76353ff45df865cee24b8802c2332c8f07590df6
SHA256

03541b2cf3bf022eda584b9ead6b6edeb7a47e8ccaa99b2415ee56694c9868cb
SHA512

df4248687d7a92389a3aab90dd0ccc8ea7236e8b71555bd835c33816a6e27b9a147d10fe693b57a693698c0d7c3fdbd99a3587cbfba08929c0d0fc4f34efb128
SSDEEP

49152:Q61jlIn2e7zgWTSOa7Q4hVBP35NxVg1DHeTz0CTssEORTdQRYdN+1rHzE42i9:Q6FynB7JTSOWBBNxVg1zen0CLEOhdQTl

Score

10^/10

purecrypter downloader loader

Malware Config

Signatures

Detect PureCrypter injector 1 IoCs

loader

Processes:

resource	yara_rule
behavioral1/memory/1080-55-0x0000000004D10000-0x0000000004FC0000-memory.dmp	family_purecrypter

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

Processes:

powershell.exetmp.exe

pid process

604 powershell.exe
1080 tmp.exe
1080 tmp.exe
1080 tmp.exe
1080 tmp.exe
1080 tmp.exe
1080 tmp.exe
1080 tmp.exe
1080 tmp.exe
1080 tmp.exe
1080 tmp.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

tmp.exepowershell.exe

description pid process

Token: SeDebugPrivilege 1080 tmp.exe
Token: SeDebugPrivilege 604 powershell.exe

pid	process
604	powershell.exe
1080	tmp.exe
1080	tmp.exe
1080	tmp.exe
1080	tmp.exe
1080	tmp.exe
1080	tmp.exe
1080	tmp.exe
1080	tmp.exe
1080	tmp.exe
1080	tmp.exe

description	pid	process
Token: SeDebugPrivilege	1080	tmp.exe
Token: SeDebugPrivilege	604	powershell.exe

Suspicious use of WriteProcessMemory 64 IoCs

Processes:

tmp.exe

description	pid	process	target process
PID 1080 wrote to memory of 604	1080	tmp.exe	powershell.exe
PID 1080 wrote to memory of 604	1080	tmp.exe	powershell.exe
PID 1080 wrote to memory of 604	1080	tmp.exe	powershell.exe
PID 1080 wrote to memory of 604	1080	tmp.exe	powershell.exe
PID 1080 wrote to memory of 1084	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1084	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1084	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1084	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1084	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1084	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1084	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1016	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1016	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1016	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1016	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1016	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1016	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1016	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1232	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1232	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1232	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1232	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1232	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1232	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1232	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1768	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1768	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1768	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1768	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1768	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1768	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1768	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 852	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 852	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 852	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 852	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 852	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 852	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 852	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 324	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 324	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 324	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 324	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 324	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 324	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 324	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1152	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1152	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1152	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1152	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1152	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1152	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1152	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 752	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 752	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 752	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 752	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 752	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 752	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 752	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1536	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1536	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1536	1080	tmp.exe	tmp.exe
PID 1080 wrote to memory of 1536	1080	tmp.exe	tmp.exe

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1080

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:604

C:\Users\Admin\AppData\Local\Temp\tmp.exe
C:\Users\Admin\AppData\Local\Temp\tmp.exe
2⤵
PID:1084

C:\Users\Admin\AppData\Local\Temp\tmp.exe
C:\Users\Admin\AppData\Local\Temp\tmp.exe
2⤵
PID:1768

C:\Users\Admin\AppData\Local\Temp\tmp.exe
C:\Users\Admin\AppData\Local\Temp\tmp.exe
2⤵
PID:1232

C:\Users\Admin\AppData\Local\Temp\tmp.exe
C:\Users\Admin\AppData\Local\Temp\tmp.exe
2⤵
PID:1016

C:\Users\Admin\AppData\Local\Temp\tmp.exe
C:\Users\Admin\AppData\Local\Temp\tmp.exe
2⤵
PID:852

C:\Users\Admin\AppData\Local\Temp\tmp.exe
C:\Users\Admin\AppData\Local\Temp\tmp.exe
2⤵
PID:324

C:\Users\Admin\AppData\Local\Temp\tmp.exe
C:\Users\Admin\AppData\Local\Temp\tmp.exe
2⤵
PID:1152

C:\Users\Admin\AppData\Local\Temp\tmp.exe
C:\Users\Admin\AppData\Local\Temp\tmp.exe
2⤵
PID:752

C:\Users\Admin\AppData\Local\Temp\tmp.exe
C:\Users\Admin\AppData\Local\Temp\tmp.exe
2⤵
PID:1536

C:\Users\Admin\AppData\Local\Temp\tmp.exe
C:\Users\Admin\AppData\Local\Temp\tmp.exe
2⤵
PID:1912

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/604-57-0x0000000000000000-mapping.dmp

Download
memory/604-59-0x000000006FA00000-0x000000006FFAB000-memory.dmp

Filesize
5.7MB

Download
memory/604-60-0x000000006FA00000-0x000000006FFAB000-memory.dmp

Filesize
5.7MB

Download
memory/604-61-0x000000006FA00000-0x000000006FFAB000-memory.dmp

Filesize
5.7MB

Download
memory/1080-54-0x00000000002C0000-0x0000000000572000-memory.dmp

Filesize
2.7MB

Download
memory/1080-55-0x0000000004D10000-0x0000000004FC0000-memory.dmp

Filesize
2.7MB

Download
memory/1080-56-0x0000000076411000-0x0000000076413000-memory.dmp

Filesize
8KB

Download
memory/1080-62-0x00000000053D0000-0x0000000005450000-memory.dmp

Filesize
512KB

Download

Analysis

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