d4fb2e5b7f988b7db1d86bad83da846ebce7e923d94a30cb8e6649ce9e4cd5e2

Analysis

max time kernel
133s
max time network
150s
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, 06:37

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General

Target
840f3a90967edae5af243a9786d52ea0_NEAS.exe
Size 196KB
Sample240507-hdkt7agb87
SHA256 d4fb2e5b7f988b7db1d86bad83da846ebce7e923d94a30cb8e6649ce9e4cd5e2
MD5 840f3a90967edae5af243a9786d52ea0
SHA1 23a1d1fb708b63d8576fbe45c3f9900b56f47125
SHA512 a152f44555aeb8d1be11d244ae21938443d6750725d13f5d9e4f364de7a1a1246f73804d5270abcb81ad5b3fb8033a546df036fcd2f52051ca07f94d28b8bded
SSDEEP 3072:a74MyJjjlLzVjN50BdQqlYgp72xzbuawaGO0OJw8KWs6IgVLE7QkfIA:awj30dlZ+GVaRVLE7QkfI
MD5 SHA1 SHA512 SSDEEP

Score

8^/10

bootkit persistence spyware stealer upx

Malware Config

Signatures

Blocklisted process makes network request 7 IoCs

flow	pid	Process
18	2296	rundll32.exe
25	2296	rundll32.exe
27	2296	rundll32.exe
28	2296	rundll32.exe
46	2296	rundll32.exe
72	2296	rundll32.exe
73	2296	rundll32.exe

Deletes itself 1 IoCs

pid	Process
4468	vbpkk.exe

Executes dropped EXE 1 IoCs

pid	Process
4468	vbpkk.exe

Loads dropped DLL 1 IoCs

pid	Process
2296	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

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/1424-0-0x0000000000400000-0x000000000044A000-memory.dmp	upx
behavioral2/memory/1424-2-0x0000000000400000-0x000000000044A000-memory.dmp	upx
behavioral2/files/0x000c000000023b42-4.dat	upx
behavioral2/memory/4468-6-0x0000000000400000-0x000000000044A000-memory.dmp	upx
behavioral2/memory/4468-9-0x0000000000400000-0x000000000044A000-memory.dmp	upx

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-1-5-21-877519540-908060166-1852957295-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Micro = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\mkfmp\\lzast.dll\",method"	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)	\??\p:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\z:	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)	\??\n:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\o:	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

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\mkfmp	vbpkk.exe
File created	\??\c:\Program Files\mkfmp\lzast.dll	vbpkk.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
4480	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe
2296	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2296	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1424	840f3a90967edae5af243a9786d52ea0_NEAS.exe
4468	vbpkk.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1424 wrote to memory of 3772	1424	840f3a90967edae5af243a9786d52ea0_NEAS.exe	85
PID 1424 wrote to memory of 3772	1424	840f3a90967edae5af243a9786d52ea0_NEAS.exe	85
PID 1424 wrote to memory of 3772	1424	840f3a90967edae5af243a9786d52ea0_NEAS.exe	85
PID 3772 wrote to memory of 4480	3772	cmd.exe	88
PID 3772 wrote to memory of 4480	3772	cmd.exe	88
PID 3772 wrote to memory of 4480	3772	cmd.exe	88
PID 3772 wrote to memory of 4468	3772	cmd.exe	91
PID 3772 wrote to memory of 4468	3772	cmd.exe	91
PID 3772 wrote to memory of 4468	3772	cmd.exe	91
PID 4468 wrote to memory of 2296	4468	vbpkk.exe	92
PID 4468 wrote to memory of 2296	4468	vbpkk.exe	92
PID 4468 wrote to memory of 2296	4468	vbpkk.exe	92

C:\Users\Admin\AppData\Local\Temp\840f3a90967edae5af243a9786d52ea0_NEAS.exe
"C:\Users\Admin\AppData\Local\Temp\840f3a90967edae5af243a9786d52ea0_NEAS.exe"
1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1424
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\vbpkk.exe "C:\Users\Admin\AppData\Local\Temp\840f3a90967edae5af243a9786d52ea0_NEAS.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3772
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 2
    3⤵
    - Runs ping.exe
    PID:4480
- - C:\Users\Admin\AppData\Local\Temp\vbpkk.exe
    C:\Users\Admin\AppData\Local\Temp\\vbpkk.exe "C:\Users\Admin\AppData\Local\Temp\840f3a90967edae5af243a9786d52ea0_NEAS.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - Drops file in Program Files directory
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4468
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\mkfmp\lzast.dll",method C:\Users\Admin\AppData\Local\Temp\vbpkk.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:2296

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

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Downloads

vbpkk.exe

Path C:\Users\Admin\AppData\Local\Temp\vbpkk.exe
Size 196KB
SHA256 cbc79febb583c5f7684e902cbde5587a4517c3adf37a6ca2c9d12b41cc31b9be
MD5 9874475a6f116ddd2d2e1143f65070e3
SHA1 7a34d2ebe72c79a43c26e2a5f1ce3c7d96f28e3e
SHA512 b8a38c93b6634eca32cefe4c5f039bfca3123a08480ca9adad913dcbe64c0ff054e45f6eb87132d220aa2bae8de35ecc56d385d379a8deefeb98934718c27813
SSDEEP 3072:a74MyJjjlLzVjN50BdQqlYgp72xzbuawaGO0OJw8KWs6IgVLE7QkfIAI:awj30dlZ+GVaRVLE7QkfIp
MD5 SHA1 SHA512 SSDEEP

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lzast.dll

Path \??\c:\Program Files\mkfmp\lzast.dll
Size 148KB
SHA256 1e81ecb7d2132a7785e076a0d55509c6ea5ac229c1cc8f8c137d997eeff15b16
MD5 3ea3dc7955100908e1423bbeb89b761b
SHA1 400896ff76285ec7e0586aa07f534d8d08366177
SHA512 75677aedf283e1f9dd7850ea28aeb45634977b6c4dad59fe263ff2fea8efe6694bfdde60f98803af4ab48203691812f4710f114f65b8ae4fb9c73ca1373dc483
SSDEEP 3072:VniPfUkOBCPiik5qOu5p/X+HB2n1Zn4419dYOfkYbRq:1i38Bb5qOWlX+HY1Zn40958YVq
MD5 SHA1 SHA512 SSDEEP

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memory/1424-0-0x0000000000400000-0x000000000044A000-memory.dmp

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memory/1424-2-0x0000000000400000-0x000000000044A000-memory.dmp

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memory/2296-12-0x0000000010000000-0x0000000010056000-memory.dmp

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memory/2296-15-0x0000000010050000-0x0000000010051000-memory.dmp

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memory/2296-14-0x0000000010000000-0x0000000010056000-memory.dmp

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memory/2296-16-0x0000000010000000-0x0000000010056000-memory.dmp

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memory/4468-6-0x0000000000400000-0x000000000044A000-memory.dmp

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memory/4468-9-0x0000000000400000-0x000000000044A000-memory.dmp

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