0284fb3c7a3498dc8adb39a369d78197a4b949c1f85c765ceca6dbdd762d3571

Analysis

max time kernel
142s
max time network
135s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
07/05/2024, 12:51

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General

Target
8a52d793bdc5a2fd28610be651b59ae0_NEAS.exe
Size 145KB
Sample240507-p3mteaba74
SHA256 0284fb3c7a3498dc8adb39a369d78197a4b949c1f85c765ceca6dbdd762d3571
MD5 8a52d793bdc5a2fd28610be651b59ae0
SHA1 12c363b1ab0eeee2d97213df85a90c186d7b47f1
SHA512 ac54697b94baaf0902a44c494f82355b666cff3e88602637cc33709c88cd3e621ee542d712beb68cd326b5217f554b0908212f1dce4869dae5085da0835a1ac8
SSDEEP 1536:+fxvtgixq7OstjzjW6ZdjtETzR77i11GAbRp0BGiEA0O0o:+HIa6KTdNAbzSGiN0OJ
MD5 SHA1 SHA512 SSDEEP

Score

8^/10

bootkit persistence spyware stealer

Malware Config

Signatures

Blocklisted process makes network request 8 IoCs

flow	pid	Process
22	3728	rundll32.exe
29	3728	rundll32.exe
30	3728	rundll32.exe
31	3728	rundll32.exe
45	3728	rundll32.exe
46	3728	rundll32.exe
57	3728	rundll32.exe
72	3728	rundll32.exe

Deletes itself 1 IoCs

pid	Process
1000	vnynt.exe

Executes dropped EXE 1 IoCs

pid	Process
1000	vnynt.exe

Loads dropped DLL 1 IoCs

pid	Process
3728	rundll32.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2860750803-256193626-1801997576-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\ywncqsgr\\azgar.dll\",GetWindowClass"	rundll32.exe

Enumerates connected drives 3 TTPs 23 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PHYSICALDRIVE0	rundll32.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	rundll32.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3256	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3728	rundll32.exe
3728	rundll32.exe
3728	rundll32.exe
3728	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3728	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4092	8a52d793bdc5a2fd28610be651b59ae0_NEAS.exe
1000	vnynt.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4092 wrote to memory of 4512	4092	8a52d793bdc5a2fd28610be651b59ae0_NEAS.exe	84
PID 4092 wrote to memory of 4512	4092	8a52d793bdc5a2fd28610be651b59ae0_NEAS.exe	84
PID 4092 wrote to memory of 4512	4092	8a52d793bdc5a2fd28610be651b59ae0_NEAS.exe	84
PID 4512 wrote to memory of 3256	4512	cmd.exe	86
PID 4512 wrote to memory of 3256	4512	cmd.exe	86
PID 4512 wrote to memory of 3256	4512	cmd.exe	86
PID 4512 wrote to memory of 1000	4512	cmd.exe	89
PID 4512 wrote to memory of 1000	4512	cmd.exe	89
PID 4512 wrote to memory of 1000	4512	cmd.exe	89
PID 1000 wrote to memory of 3728	1000	vnynt.exe	91
PID 1000 wrote to memory of 3728	1000	vnynt.exe	91
PID 1000 wrote to memory of 3728	1000	vnynt.exe	91

C:\Users\Admin\AppData\Local\Temp\8a52d793bdc5a2fd28610be651b59ae0_NEAS.exe
"C:\Users\Admin\AppData\Local\Temp\8a52d793bdc5a2fd28610be651b59ae0_NEAS.exe"
1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4092
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\vnynt.exe "C:\Users\Admin\AppData\Local\Temp\8a52d793bdc5a2fd28610be651b59ae0_NEAS.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4512
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 2
    3⤵
    - Runs ping.exe
    PID:3256
- - \??\c:\vnynt.exe
    c:\vnynt.exe "C:\Users\Admin\AppData\Local\Temp\8a52d793bdc5a2fd28610be651b59ae0_NEAS.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1000
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\ywncqsgr\azgar.dll",GetWindowClass c:\vnynt.exe
      4⤵
      Blocklisted process makes network request
      Loads dropped DLL
      Adds Run key to start application
      Enumerates connected drives
      Writes to the Master Boot Record (MBR)
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:3728

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

vnynt.exe

Path C:\vnynt.exe
Size 145KB
SHA256 4d798d26431865141591c2784bef4f9f2516767a90b65c1086d55e265e2f84f8
MD5 458ea984a1cb409d3056cc547f674fdd
SHA1 96825acbe4b6ae50bcc0f67524fac2c90a4791bb
SHA512 81d0307ae92205f665022c90f3d9be744034e83deb187d7c0befa939fc69e5db585886308468d2740c5f8d7a315113c80d4c0b32a44ac51241d2091286a7a8d0
SSDEEP 1536:+fxvtgixq7OstjzjW6ZdjtETzR77i11GAbRp0BGiEA0O0ox:+HIa6KTdNAbzSGiN0OJx
MD5 SHA1 SHA512 SSDEEP

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azgar.dll

Path \??\c:\ywncqsgr\azgar.dll
Size 63KB
SHA256 032570414587af2303431e8db5d5f4223e0147f4b63a2160b97d9a6ea531bd81
MD5 bec93912524f50c6f7c943716c7ef02b
SHA1 69ba8f1dd5a7d6cd94d688c691406cbd54be4486
SHA512 41fb8970e9007c789227740e81a483bda806470ce25476589a3dfceddaaa60b20d890c37b56f8be83defb2a5b774dbd6c2026fc259884e8acf2971b06041f6a6
SSDEEP 1536:bBgQPJw/1HCl8h1hPkLzPT9d2xQLoChf89uF7DTwVAEV:beq2/1HCa1EzPTfWQMN9uFvMVp
MD5 SHA1 SHA512 SSDEEP

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memory/1000-5-0x0000000000400000-0x0000000000425400-memory.dmp

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memory/1000-9-0x0000000000400000-0x0000000000425400-memory.dmp

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memory/3728-12-0x0000000010000000-0x0000000010036000-memory.dmp

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memory/3728-13-0x0000000000CD0000-0x0000000000CD2000-memory.dmp

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memory/3728-14-0x0000000010000000-0x0000000010036000-memory.dmp

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memory/3728-16-0x0000000010000000-0x0000000010036000-memory.dmp

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memory/3728-18-0x0000000010000000-0x0000000010036000-memory.dmp

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memory/4092-0-0x0000000000400000-0x0000000000425400-memory.dmp

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memory/4092-2-0x0000000000400000-0x0000000000425400-memory.dmp

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