d7255462d3c048991f6cb44d9b0356f7f9e2a67c51a598c9082f6da88fbc8c27

Analysis

max time kernel
150s
max time network
34s
platform
windows7_x64
resource
win7-20230703-en
resource tags

arch:x64arch:x86image:win7-20230703-enlocale:en-usos:windows7-x64system
submitted
08/07/2023, 22:14

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General

Target

MTalk/OpenJTalk/dic/win/matrix.bin
Size

3.6MB
MD5

dfadac13b05ae25cef4929d98f995049
SHA1

5a385586854033b2fc57da361fb03998c0b907da
SHA256

0bc1006d5ca9ab9414600c5be7e315dc361622284c7d2e0fb87d4e263c69f0f9
SHA512

f23cc654e6fbd4deaf7e77df18182f08e4a62215271211402ebb5bd82eb328c29c2fac6e27a94cfda4235b408374a0c34fb0a961bc68f9b351caff746b9cfff3
SSDEEP

98304:jp2j1KsKli78DU2L/fjXA2fH4YWwqbLW2L:jp2j1QDVLrA2f7WwqbL1L

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-1-5-21-2813141852-3076131560-4232376420-1000_Classes\Local Settings	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2813141852-3076131560-4232376420-1000_CLASSES\bin_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2813141852-3076131560-4232376420-1000_CLASSES\.bin	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2813141852-3076131560-4232376420-1000_CLASSES\bin_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2813141852-3076131560-4232376420-1000_CLASSES\bin_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2813141852-3076131560-4232376420-1000_CLASSES\.bin\ = "bin_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2813141852-3076131560-4232376420-1000_CLASSES\bin_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2813141852-3076131560-4232376420-1000_CLASSES\bin_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2813141852-3076131560-4232376420-1000_CLASSES\bin_auto_file\shell\Read\command	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1644	AcroRd32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
1644	AcroRd32.exe
1644	AcroRd32.exe
1644	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2696 wrote to memory of 2976	2696	cmd.exe	29
PID 2696 wrote to memory of 2976	2696	cmd.exe	29
PID 2696 wrote to memory of 2976	2696	cmd.exe	29
PID 2976 wrote to memory of 1644	2976	rundll32.exe	30
PID 2976 wrote to memory of 1644	2976	rundll32.exe	30
PID 2976 wrote to memory of 1644	2976	rundll32.exe	30
PID 2976 wrote to memory of 1644	2976	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\MTalk\OpenJTalk\dic\win\matrix.bin
1⤵
- Suspicious use of WriteProcessMemory
PID:2696
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\MTalk\OpenJTalk\dic\win\matrix.bin
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2976
- - 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\MTalk\OpenJTalk\dic\win\matrix.bin"
    3⤵
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    PID:1644

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

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Downloads

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

Filesize
3KB

MD5
b8d0a17f68d846bcc7b03d26dac31cbd

SHA1
3c3d895a85c947072a6e29bb745d49d969a6fe74

SHA256
c2e589d4e384b2a806901102cea3858ddfb7e4cef22731b2ecb29b7ab8b4be4d

SHA512
ca22638e5746e556edd1f2ec05e52a84bb4966c007c222c821beb486244c86b54a2719ec2dca86c3461295bbd0468c904feab6dcf2108c89641a7425470b1c37

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