58b5c71cb21b0c9327216aff93feed72365921d396e21eab0f2413a84fdd833f

Analysis

max time kernel
150s
max time network
49s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
01/10/2022, 23:22

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General

Target

W6.class
Size

1KB
MD5

3666db4a77ff1dde0f02aa6fa5df5792
SHA1

e9f7410a0dc0fa5a7f349c6c66b4d368e5627735
SHA256

b24ed2a74b62a1d6928000d06459dd8403f701d81f44ae59b2ab3026f1a02aa5
SHA512

64d4478bb3ddda36210c02ea7809b66609dc670235f9d9f6bbfb497b2a0c0e91f48bb61f263f85f65271e858bf125fa6a5b4462c92e5eaa82594f8a715f5ae46

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
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000_CLASSES\class_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000_CLASSES\.class	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000_CLASSES\.class\ = "class_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000_CLASSES\class_auto_file\shell\Read\command	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\MuiCache	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000_CLASSES\class_auto_file	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000_CLASSES\class_auto_file\shell	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000_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-1-5-21-4063495947-34355257-727531523-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000_CLASSES\class_auto_file\shell\Read	rundll32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
1924	AcroRd32.exe
1924	AcroRd32.exe
1924	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1484 wrote to memory of 1700	1484	cmd.exe	28
PID 1484 wrote to memory of 1700	1484	cmd.exe	28
PID 1484 wrote to memory of 1700	1484	cmd.exe	28
PID 1700 wrote to memory of 1924	1700	rundll32.exe	29
PID 1700 wrote to memory of 1924	1700	rundll32.exe	29
PID 1700 wrote to memory of 1924	1700	rundll32.exe	29
PID 1700 wrote to memory of 1924	1700	rundll32.exe	29

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\W6.class
1⤵
- Suspicious use of WriteProcessMemory
PID:1484
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\W6.class
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:1700
- - 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\W6.class"
    3⤵
    - Suspicious use of SetWindowsHookEx
    PID:1924

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/1484-54-0x000007FEFC5A1000-0x000007FEFC5A3000-memory.dmp

Filesize
8KB

Download
memory/1924-82-0x0000000076BA1000-0x0000000076BA3000-memory.dmp

Filesize
8KB

Download