purecrypter | 1d3193d3f4806b993f8bf3874f0bfbacfedd860a82ed8b6ab26a9a0d30338a7d

Analysis

max time kernel
91s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
23-12-2024 22:31

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General

Target

JaffaCakes118_1d3193d3f4806b993f8bf3874f0bfbacfedd860a82ed8b6ab26a9a0d30338a7d.exe
Size

715.8MB
MD5

6697e2951a46bee77fcbd59321c8fc06
SHA1

c8966259d2aa9c216f173f566f3962531b405f10
SHA256

1d3193d3f4806b993f8bf3874f0bfbacfedd860a82ed8b6ab26a9a0d30338a7d
SHA512

fe2be9aeb203bcc81c205e833a1ed9a698cf6edc82053431a34e8d84f2447e9bcaddda11ff4a5b93df7a45ffcd2a6c4f483907f30326d6ce43faf9ee2ffdb1c1
SSDEEP

1536:3rae78zjORCDGwfdCSog013131Zs5gW0MuiNcL3IIG4BLpre1ID1PxY3hBq:dahKyd2n31F253ObL3IIG4xle1IVxGq

Score

10^/10

purecrypter discovery downloader loader persistence

Malware Config

Extracted

Family

purecrypter

http://comicmaster.org.uk/img/css/design/fabric/bo/Kvxut.dat

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
4508	setupov16.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\\\""	JaffaCakes118_1d3193d3f4806b993f8bf3874f0bfbacfedd860a82ed8b6ab26a9a0d30338a7d.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2472	4508	WerFault.exe	86

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	setupov16.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4508	setupov16.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4216 wrote to memory of 4508	4216	JaffaCakes118_1d3193d3f4806b993f8bf3874f0bfbacfedd860a82ed8b6ab26a9a0d30338a7d.exe	86
PID 4216 wrote to memory of 4508	4216	JaffaCakes118_1d3193d3f4806b993f8bf3874f0bfbacfedd860a82ed8b6ab26a9a0d30338a7d.exe	86
PID 4216 wrote to memory of 4508	4216	JaffaCakes118_1d3193d3f4806b993f8bf3874f0bfbacfedd860a82ed8b6ab26a9a0d30338a7d.exe	86

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1d3193d3f4806b993f8bf3874f0bfbacfedd860a82ed8b6ab26a9a0d30338a7d.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1d3193d3f4806b993f8bf3874f0bfbacfedd860a82ed8b6ab26a9a0d30338a7d.exe"
1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:4216
- C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\setupov16.exe
  C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\setupov16.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:4508
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4508 -s 1696
    3⤵
    - Program crash
    PID:2472

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 4508 -ip 4508
1⤵
PID:3944

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/4508-5-0x0000000074ECE000-0x0000000074ECF000-memory.dmp

Filesize
4KB

Download
memory/4508-6-0x0000000000B20000-0x0000000000B28000-memory.dmp

Filesize
32KB

Download
memory/4508-7-0x0000000074EC0000-0x0000000075670000-memory.dmp

Filesize
7.7MB

Download
memory/4508-8-0x0000000074ECE000-0x0000000074ECF000-memory.dmp

Filesize
4KB

Download
memory/4508-9-0x0000000074EC0000-0x0000000075670000-memory.dmp

Filesize
7.7MB

Download
memory/4508-10-0x0000000074EC0000-0x0000000075670000-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