purecrypter | 3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656

Analysis

max time kernel
44s
max time network
47s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
07/02/2023, 12:15

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General

Target

3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
Size

2.6MB
MD5

0fb29b3596164f56c1e599e88e9de6bc
SHA1

1208d75d6fd23f64b34358254421c9c817f89802
SHA256

3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656
SHA512

e10b5fc5046723729c00f8d3a295d90a9628a41651d9fd2338edea37361924436cad668573d9bd281f94b518abd8111d067c6aa370314ddafe16ad3022eedbe8
SSDEEP

49152:rAQuUQKJOdXIA+aXnFT3rXHwrg9VM51cks3tyJGbaaIadIQEOll/WZtUYEzxCWng:unArgUw5/I0IMbW2zxCWt+

Score

10^/10

purecrypter downloader loader persistence

Malware Config

Signatures

Detect PureCrypter injector 1 IoCs

loader

resource	yara_rule
behavioral1/memory/968-55-0x0000000004D70000-0x0000000005000000-memory.dmp	family_purecrypter

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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\frirefox = "\"C:\\Users\\Admin\\AppData\\Roaming\\downloads\\frirefox.exe\""	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe

Suspicious use of WriteProcessMemory 40 IoCs

description	pid	Process	procid_target
PID 968 wrote to memory of 1892	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	28
PID 968 wrote to memory of 1892	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	28
PID 968 wrote to memory of 1892	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	28
PID 968 wrote to memory of 1892	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	28
PID 968 wrote to memory of 1708	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	29
PID 968 wrote to memory of 1708	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	29
PID 968 wrote to memory of 1708	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	29
PID 968 wrote to memory of 1708	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	29
PID 968 wrote to memory of 2004	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	30
PID 968 wrote to memory of 2004	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	30
PID 968 wrote to memory of 2004	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	30
PID 968 wrote to memory of 2004	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	30
PID 968 wrote to memory of 2012	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	31
PID 968 wrote to memory of 2012	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	31
PID 968 wrote to memory of 2012	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	31
PID 968 wrote to memory of 2012	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	31
PID 968 wrote to memory of 1416	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	32
PID 968 wrote to memory of 1416	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	32
PID 968 wrote to memory of 1416	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	32
PID 968 wrote to memory of 1416	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	32
PID 968 wrote to memory of 944	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	33
PID 968 wrote to memory of 944	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	33
PID 968 wrote to memory of 944	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	33
PID 968 wrote to memory of 944	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	33
PID 968 wrote to memory of 1928	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	34
PID 968 wrote to memory of 1928	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	34
PID 968 wrote to memory of 1928	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	34
PID 968 wrote to memory of 1928	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	34
PID 968 wrote to memory of 1704	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	35
PID 968 wrote to memory of 1704	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	35
PID 968 wrote to memory of 1704	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	35
PID 968 wrote to memory of 1704	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	35
PID 968 wrote to memory of 1976	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	36
PID 968 wrote to memory of 1976	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	36
PID 968 wrote to memory of 1976	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	36
PID 968 wrote to memory of 1976	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	36
PID 968 wrote to memory of 1984	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	37
PID 968 wrote to memory of 1984	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	37
PID 968 wrote to memory of 1984	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	37
PID 968 wrote to memory of 1984	968	3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe	37

C:\Users\Admin\AppData\Local\Temp\3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
"C:\Users\Admin\AppData\Local\Temp\3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe"
1⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:968
- C:\Users\Admin\AppData\Local\Temp\3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
  C:\Users\Admin\AppData\Local\Temp\3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
  2⤵
  PID:1892
- C:\Users\Admin\AppData\Local\Temp\3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
  C:\Users\Admin\AppData\Local\Temp\3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
  2⤵
  PID:1708
- C:\Users\Admin\AppData\Local\Temp\3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
  C:\Users\Admin\AppData\Local\Temp\3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
  2⤵
  PID:2004
- C:\Users\Admin\AppData\Local\Temp\3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
  C:\Users\Admin\AppData\Local\Temp\3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
  2⤵
  PID:2012
- C:\Users\Admin\AppData\Local\Temp\3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
  C:\Users\Admin\AppData\Local\Temp\3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
  2⤵
  PID:1416
- C:\Users\Admin\AppData\Local\Temp\3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
  C:\Users\Admin\AppData\Local\Temp\3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
  2⤵
  PID:944
- C:\Users\Admin\AppData\Local\Temp\3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
  C:\Users\Admin\AppData\Local\Temp\3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
  2⤵
  PID:1928
- C:\Users\Admin\AppData\Local\Temp\3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
  C:\Users\Admin\AppData\Local\Temp\3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
  2⤵
  PID:1704
- C:\Users\Admin\AppData\Local\Temp\3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
  C:\Users\Admin\AppData\Local\Temp\3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
  2⤵
  PID:1976
- C:\Users\Admin\AppData\Local\Temp\3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
  C:\Users\Admin\AppData\Local\Temp\3a20e81b1f0bf0699007470e5a8e2a9a0d6507ea99696f0df9bd99b80910d656.exe
  2⤵
  PID:1984

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/968-54-0x00000000003A0000-0x0000000000642000-memory.dmp

Filesize
2.6MB

Download
memory/968-55-0x0000000004D70000-0x0000000005000000-memory.dmp

Filesize
2.6MB

Download
memory/968-56-0x0000000075921000-0x0000000075923000-memory.dmp

Filesize
8KB

Download
memory/968-57-0x00000000044B0000-0x0000000004530000-memory.dmp

Filesize
512KB

Download