550321da5b10c472bc719bca2c0df74b240f80eff828079eb5253598fe112ae3

Analysis

max time kernel
120s
max time network
124s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
02-03-2024 15:33

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

SAMP/blanktex.txd
Size

32KB
MD5

00dc42d499f5ca6059e4683fd761f032
SHA1

901fd1c737e95f09c096826eb547849ca1873b85
SHA256

724eff1b323771153a172abb35fcf7fbfaa88af7bab906b51181a94e08ef2e67
SHA512

4186adf87d23275ef4dde005371b554ce8e1c6141f160033b549e48190e7e3c96d014ef5ed62a88298cad458c6799d0a0baf35b3a32dc34acade7eb3fa5b4772
SSDEEP

24:HSvqpPaAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAc:HwW

Score

3^/10

Malware Config

Signatures

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

System Information Discovery
T1082

Modifies registry class 9 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\.txd	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\.txd\ = "txd_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\txd_auto_file\shell	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\txd_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\txd_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\txd_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\txd_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\txd_auto_file\shell\Read\command	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2076	AcroRd32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2076	AcroRd32.exe
2076	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2348 wrote to memory of 2660	2348	cmd.exe	29
PID 2348 wrote to memory of 2660	2348	cmd.exe	29
PID 2348 wrote to memory of 2660	2348	cmd.exe	29
PID 2660 wrote to memory of 2076	2660	rundll32.exe	30
PID 2660 wrote to memory of 2076	2660	rundll32.exe	30
PID 2660 wrote to memory of 2076	2660	rundll32.exe	30
PID 2660 wrote to memory of 2076	2660	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\SAMP\blanktex.txd
1⤵
- Suspicious use of WriteProcessMemory
PID:2348
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\SAMP\blanktex.txd
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2660
- - 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\SAMP\blanktex.txd"
    3⤵
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    PID:2076

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\Adobe\Acrobat\9.0\SharedDataEvents

Filesize
3KB

MD5
e226afb24e70aae89bd0b0a9e52a9ea1

SHA1
aea8831a14aa33fb6d127fbc783ee13c0e1eae3c

SHA256
01a169ff57fbe78173aa3d0f6104bc0a8ca5e0044b7d3011013ab680fc009793

SHA512
59b47e36d50c801a74922a342c7ed593a9e4573b3ab91b54a399e2ad29162c59134191fbf50fed2fed4b49048fe026aa88d296eacf24694f357b3f1155f14112

Download Submit