58b5c71cb21b0c9327216aff93feed72365921d396e21eab0f2413a84fdd833f

Analysis

max time kernel
151s
max time network
50s
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

W5.class
Size

1KB
MD5

98b5f57dcfbf974f7f41b9bf566953f1
SHA1

54be206936eb80e772eb014875a365eb8f5fb5a0
SHA256

b0799d95d7e4e3e2af3fbf345dd6dac5ba072220e48f670ac26a7e79b83f8244
SHA512

b586dc688d68f651497e2e475c4e73dbedce42df78a8f7c9bf52d4f4ce881cb49c189c201f2ea44d7e908b97e5b2711a3b5e56c4914043cac9e5369d8eb04625

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
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	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\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	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000_CLASSES\class_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000_CLASSES\class_auto_file\shell\Read\command	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

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
1896	AcroRd32.exe
1896	AcroRd32.exe
1896	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2016 wrote to memory of 580	2016	cmd.exe	28
PID 2016 wrote to memory of 580	2016	cmd.exe	28
PID 2016 wrote to memory of 580	2016	cmd.exe	28
PID 580 wrote to memory of 1896	580	rundll32.exe	29
PID 580 wrote to memory of 1896	580	rundll32.exe	29
PID 580 wrote to memory of 1896	580	rundll32.exe	29
PID 580 wrote to memory of 1896	580	rundll32.exe	29

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\W5.class
1⤵
- Suspicious use of WriteProcessMemory
PID:2016
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\W5.class
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:580
- - 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\W5.class"
    3⤵
    - Suspicious use of SetWindowsHookEx
    PID:1896

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/1896-82-0x00000000766D1000-0x00000000766D3000-memory.dmp

Filesize
8KB

Download
memory/2016-54-0x000007FEFC2F1000-0x000007FEFC2F3000-memory.dmp

Filesize
8KB

Download