58b5c71cb21b0c9327216aff93feed72365921d396e21eab0f2413a84fdd833f

Analysis

max time kernel
150s
max time network
44s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
01/10/2022, 23:22

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General

Target

MyBufferedImage.class
Size

2KB
MD5

63b468040d94fcaffa07330ae976ba4d
SHA1

ed9a9214b76da54a12773b613f97f2a071c31e28
SHA256

9f54b8e39676e3104f1635e8562884a04c79de431ff837dc9c2ac05ccd9be3d5
SHA512

b1ad8207a9137cc43478795193a22c40a27026f1bc5363c918b516900301cefe8a217ed5b9dc33918c81c36db4a5479906366e049064f69ddc247b0fb1d94daf

Score

3^/10

Malware Config

Signatures

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Modifies registry class 10 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000_CLASSES\.class	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000_CLASSES\.class\ = "class_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000_CLASSES\class_auto_file\shell\Read	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000_CLASSES\class_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\MuiCache	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000_CLASSES\class_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000_CLASSES\class_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000_CLASSES\class_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000_CLASSES\class_auto_file\shell\Read\command	rundll32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
268	AcroRd32.exe
268	AcroRd32.exe
268	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 112 wrote to memory of 1748	112	cmd.exe	28
PID 112 wrote to memory of 1748	112	cmd.exe	28
PID 112 wrote to memory of 1748	112	cmd.exe	28
PID 1748 wrote to memory of 268	1748	rundll32.exe	29
PID 1748 wrote to memory of 268	1748	rundll32.exe	29
PID 1748 wrote to memory of 268	1748	rundll32.exe	29
PID 1748 wrote to memory of 268	1748	rundll32.exe	29

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\MyBufferedImage.class
1⤵
- Suspicious use of WriteProcessMemory
PID:112
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\MyBufferedImage.class
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:1748
- - C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe
    "C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe" "C:\Users\Admin\AppData\Local\Temp\MyBufferedImage.class"
    3⤵
    - Suspicious use of SetWindowsHookEx
    PID:268

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/112-54-0x000007FEFB5D1000-0x000007FEFB5D3000-memory.dmp

Filesize
8KB

Download
memory/268-82-0x0000000074C11000-0x0000000074C13000-memory.dmp

Filesize
8KB

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