83c23fc5b9c23e97b79c0e8a2fafd0fe61bcb8025b77bf1f56f60f8a5f90839c

Analysis

max time kernel
188s
max time network
51s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
29/11/2022, 13:00

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General

Target

yahooa/yahood.class
Size

14KB
MD5

83edda79a87da4fad3a6b8f5777f603e
SHA1

bbdcfb963892155b6009350cf666cf00dc95e6fd
SHA256

7b748a548eaca1b5d50000863e07494b7d168dd05b6474cca5f62e8ff54117c6
SHA512

03f847734f9621b4fbb944575b9dfed271b282607000f8b9162fd0269c07fcad4b13d874c28adc11c74d3b752e6ede176c3b4f80ece2c7e7001a07eff690d980
SSDEEP

384:hfsFumeCgcxoiN1PJqrWHNiTIB4KQKDW7fJ2qFT:hfbTCBxoiNh0rZEXTDW7fJp

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-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\.class	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\.class\ = "class_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\class_auto_file\shell\Read\command	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_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-1-5-21-3406023954-474543476-3319432036-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\MuiCache	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\class_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\class_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\class_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\class_auto_file\shell	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
656	AcroRd32.exe
656	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1776 wrote to memory of 1884	1776	cmd.exe	29
PID 1776 wrote to memory of 1884	1776	cmd.exe	29
PID 1776 wrote to memory of 1884	1776	cmd.exe	29
PID 1884 wrote to memory of 656	1884	rundll32.exe	30
PID 1884 wrote to memory of 656	1884	rundll32.exe	30
PID 1884 wrote to memory of 656	1884	rundll32.exe	30
PID 1884 wrote to memory of 656	1884	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\yahooa\yahood.class
1⤵
- Suspicious use of WriteProcessMemory
PID:1776
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\yahooa\yahood.class
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:1884
- - 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\yahooa\yahood.class"
    3⤵
    - Suspicious use of SetWindowsHookEx
    PID:656

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/656-82-0x0000000075C31000-0x0000000075C33000-memory.dmp

Filesize
8KB

Download
memory/1776-54-0x000007FEFBF91000-0x000007FEFBF93000-memory.dmp

Filesize
8KB

Download