0284fb3c7a3498dc8adb39a369d78197a4b949c1f85c765ceca6dbdd762d3571

Analysis

max time kernel
144s
max time network
151s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-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 10 IoCs

flow	pid	Process
3	1884	rundll32.exe
7	1884	rundll32.exe
8	1884	rundll32.exe
9	1884	rundll32.exe
10	1884	rundll32.exe
13	1884	rundll32.exe
14	1884	rundll32.exe
15	1884	rundll32.exe
17	1884	rundll32.exe
18	1884	rundll32.exe

Deletes itself 1 IoCs

pid	Process
2452	mtuquql.exe

Executes dropped EXE 1 IoCs

pid	Process
2452	mtuquql.exe

Loads dropped DLL 4 IoCs

pid	Process
1884	rundll32.exe
1884	rundll32.exe
1884	rundll32.exe
1884	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-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\soljl\\rpuja.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)	\??\h:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\k:	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)	\??\u:	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
2904	PING.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1884	rundll32.exe
1884	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1884	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2440	8a52d793bdc5a2fd28610be651b59ae0_NEAS.exe
2452	mtuquql.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 2440 wrote to memory of 2832	2440	8a52d793bdc5a2fd28610be651b59ae0_NEAS.exe	28
PID 2440 wrote to memory of 2832	2440	8a52d793bdc5a2fd28610be651b59ae0_NEAS.exe	28
PID 2440 wrote to memory of 2832	2440	8a52d793bdc5a2fd28610be651b59ae0_NEAS.exe	28
PID 2440 wrote to memory of 2832	2440	8a52d793bdc5a2fd28610be651b59ae0_NEAS.exe	28
PID 2832 wrote to memory of 2904	2832	cmd.exe	30
PID 2832 wrote to memory of 2904	2832	cmd.exe	30
PID 2832 wrote to memory of 2904	2832	cmd.exe	30
PID 2832 wrote to memory of 2904	2832	cmd.exe	30
PID 2832 wrote to memory of 2452	2832	cmd.exe	31
PID 2832 wrote to memory of 2452	2832	cmd.exe	31
PID 2832 wrote to memory of 2452	2832	cmd.exe	31
PID 2832 wrote to memory of 2452	2832	cmd.exe	31
PID 2452 wrote to memory of 1884	2452	mtuquql.exe	32
PID 2452 wrote to memory of 1884	2452	mtuquql.exe	32
PID 2452 wrote to memory of 1884	2452	mtuquql.exe	32
PID 2452 wrote to memory of 1884	2452	mtuquql.exe	32
PID 2452 wrote to memory of 1884	2452	mtuquql.exe	32
PID 2452 wrote to memory of 1884	2452	mtuquql.exe	32
PID 2452 wrote to memory of 1884	2452	mtuquql.exe	32

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:2440
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\mtuquql.exe "C:\Users\Admin\AppData\Local\Temp\8a52d793bdc5a2fd28610be651b59ae0_NEAS.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2832
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 2
    3⤵
    - Runs ping.exe
    PID:2904
- - \??\c:\mtuquql.exe
    c:\mtuquql.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:2452
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\soljl\rpuja.dll",GetWindowClass c:\mtuquql.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:1884

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

mtuquql.exe

Path C:\mtuquql.exe
Size 145KB
SHA256 82cfad38e345e514cd59161e39a8d35bbaec03cc1f65246069e5585db7891682
MD5 dea2bf50bf9c9b863b9c5f101a3d8533
SHA1 27afcf158ccfb64e0e72c5f86605e3809abe63d9
SHA512 99443de3400f752a0e89af52142a606b7c48af86cc54276daf3606dcf0a51d6ba8e95912c2a374b1aa62163f84b2e5758af785b7d46e0976d8486b79f0690acc
SSDEEP 1536:+fxvtgixq7OstjzjW6ZdjtETzR77i11GAbRp0BGiEA0O0o:+HIa6KTdNAbzSGiN0OJ
MD5 SHA1 SHA512 SSDEEP

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rpuja.dll

Path \soljl\rpuja.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/1884-14-0x0000000010000000-0x0000000010036000-memory.dmp

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memory/1884-20-0x0000000010033000-0x0000000010034000-memory.dmp

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memory/1884-27-0x0000000010000000-0x0000000010036000-memory.dmp

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memory/1884-25-0x0000000010000000-0x0000000010036000-memory.dmp

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memory/1884-23-0x0000000010000000-0x0000000010036000-memory.dmp

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memory/1884-15-0x0000000010000000-0x0000000010036000-memory.dmp

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memory/1884-18-0x0000000010000000-0x0000000010036000-memory.dmp

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memory/1884-17-0x0000000010000000-0x0000000010036000-memory.dmp

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memory/1884-16-0x0000000010033000-0x0000000010034000-memory.dmp

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memory/2440-0-0x0000000000400000-0x0000000000425400-memory.dmp

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memory/2440-2-0x0000000000400000-0x0000000000425400-memory.dmp

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memory/2452-8-0x0000000000400000-0x0000000000425400-memory.dmp

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memory/2832-5-0x00000000001D0000-0x00000000001F6000-memory.dmp

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memory/2832-6-0x00000000001D0000-0x00000000001F6000-memory.dmp

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