purecrypter | f8a9e3b0e40f55e363161472b1ae42f699f14d8251685270be41a6f45d567ac6

Analysis

max time kernel
135s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
04-11-2024 18:54

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General

Target

f8a9e3b0e40f55e363161472b1ae42f699f14d8251685270be41a6f45d567ac6.exe
Size

668.1MB
MD5

d889fc82620f1cb402b8de785364e6a3
SHA1

f459f585dbffe403086eaeeb68ee78cf26eeee08
SHA256

f8a9e3b0e40f55e363161472b1ae42f699f14d8251685270be41a6f45d567ac6
SHA512

b1b19a1cc7f893244b5f8d67b5d8e0ede984de7d7ced46c630236373e32193805cb65bd583ec3bf361354a79c291316f1aca68c30d0d9f92a3fc95911b7f3c69
SSDEEP

1536:Prae78zjORCDGwfdCSog01313is5g8HiQWoOA:lahKyd2n31b5zHCoOA

Score

10^/10

purecrypter discovery downloader loader persistence

Malware Config

Extracted

Family

purecrypter

https://andit.co/pharma/app/icon/pharma/SeemOffice_Jsbzsevl.png

Signatures

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

Executes dropped EXE 1 IoCs

pid	Process
4936	looptoolov.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\wextract_cleanup0 = "rundll32.exe C:\\Windows\\system32\\advpack.dll,DelNodeRunDLL32 \"C:\\Users\\Admin\\AppData\\Local\\Temp\\IXP000.TMP\\\""	f8a9e3b0e40f55e363161472b1ae42f699f14d8251685270be41a6f45d567ac6.exe

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	looptoolov.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4936	looptoolov.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1648 wrote to memory of 4936	1648	f8a9e3b0e40f55e363161472b1ae42f699f14d8251685270be41a6f45d567ac6.exe	91
PID 1648 wrote to memory of 4936	1648	f8a9e3b0e40f55e363161472b1ae42f699f14d8251685270be41a6f45d567ac6.exe	91
PID 1648 wrote to memory of 4936	1648	f8a9e3b0e40f55e363161472b1ae42f699f14d8251685270be41a6f45d567ac6.exe	91

C:\Users\Admin\AppData\Local\Temp\f8a9e3b0e40f55e363161472b1ae42f699f14d8251685270be41a6f45d567ac6.exe
"C:\Users\Admin\AppData\Local\Temp\f8a9e3b0e40f55e363161472b1ae42f699f14d8251685270be41a6f45d567ac6.exe"
1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1648
- C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\looptoolov.exe
  C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\looptoolov.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:4936

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/4936-5-0x00000000745BE000-0x00000000745BF000-memory.dmp

Filesize
4KB

Download
memory/4936-6-0x0000000000F10000-0x0000000000F18000-memory.dmp

Filesize
32KB

Download
memory/4936-7-0x00000000745B0000-0x0000000074D60000-memory.dmp

Filesize
7.7MB

Download
memory/4936-8-0x00000000745BE000-0x00000000745BF000-memory.dmp

Filesize
4KB

Download
memory/4936-9-0x00000000745B0000-0x0000000074D60000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads