7b53366336fdde6beb6a018e6282a0552356878a87561004f421fe787268206a

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
14-05-2024 02:18

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General

Target

7b53366336fdde6beb6a018e6282a0552356878a87561004f421fe787268206a.exe
Size

406KB
MD5

45c3132f850f32b20e0916899166eb4c
SHA1

c3f57661c636b4e096beca86fba1f3f566316ffc
SHA256

7b53366336fdde6beb6a018e6282a0552356878a87561004f421fe787268206a
SHA512

273d5ea363a2bf7da632ddf6af639cdaea3ac1ba9e195beb830999d2713e0d96ae29191f4d855aeac3f0073688a84d9dfd3e6c3706055d836cafe41e147f6205
SSDEEP

6144:3w9D91dOrcN3ZGXNYFNmIkYvUIelVjjVtGRyFH4:gtRfJcNYFNm8UhlZGse

Score

8^/10

bootkit persistence spyware stealer

Malware Config

Signatures

Blocklisted process makes network request 8 IoCs

flow	pid	Process
27	4020	rundll32.exe
34	4020	rundll32.exe
35	4020	rundll32.exe
36	4020	rundll32.exe
50	4020	rundll32.exe
51	4020	rundll32.exe
59	4020	rundll32.exe
73	4020	rundll32.exe

Deletes itself 1 IoCs

pid	Process
2340	bwbkj.exe

Executes dropped EXE 1 IoCs

pid	Process
2340	bwbkj.exe

Loads dropped DLL 1 IoCs

pid	Process
4020	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-1-5-21-711569230-3659488422-571408806-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Dotx = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\nwskrasg\\cpifo.dll\",Verify"	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)	\??\j:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\q:	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)	\??\k:	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

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
4020	rundll32.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\nwskrasg	bwbkj.exe
File created	\??\c:\Program Files\nwskrasg\cpifo.dll	bwbkj.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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	rundll32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	rundll32.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3644	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe
4020	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4020	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3288	7b53366336fdde6beb6a018e6282a0552356878a87561004f421fe787268206a.exe
2340	bwbkj.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3288 wrote to memory of 2700	3288	7b53366336fdde6beb6a018e6282a0552356878a87561004f421fe787268206a.exe	83
PID 3288 wrote to memory of 2700	3288	7b53366336fdde6beb6a018e6282a0552356878a87561004f421fe787268206a.exe	83
PID 3288 wrote to memory of 2700	3288	7b53366336fdde6beb6a018e6282a0552356878a87561004f421fe787268206a.exe	83
PID 2700 wrote to memory of 3644	2700	cmd.exe	85
PID 2700 wrote to memory of 3644	2700	cmd.exe	85
PID 2700 wrote to memory of 3644	2700	cmd.exe	85
PID 2700 wrote to memory of 2340	2700	cmd.exe	88
PID 2700 wrote to memory of 2340	2700	cmd.exe	88
PID 2700 wrote to memory of 2340	2700	cmd.exe	88
PID 2340 wrote to memory of 4020	2340	bwbkj.exe	89
PID 2340 wrote to memory of 4020	2340	bwbkj.exe	89
PID 2340 wrote to memory of 4020	2340	bwbkj.exe	89

C:\Users\Admin\AppData\Local\Temp\7b53366336fdde6beb6a018e6282a0552356878a87561004f421fe787268206a.exe
"C:\Users\Admin\AppData\Local\Temp\7b53366336fdde6beb6a018e6282a0552356878a87561004f421fe787268206a.exe"
1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3288
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\bwbkj.exe "C:\Users\Admin\AppData\Local\Temp\7b53366336fdde6beb6a018e6282a0552356878a87561004f421fe787268206a.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2700
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 2
    3⤵
    - Runs ping.exe
    PID:3644
- - C:\Users\Admin\AppData\Local\Temp\bwbkj.exe
    C:\Users\Admin\AppData\Local\Temp\\bwbkj.exe "C:\Users\Admin\AppData\Local\Temp\7b53366336fdde6beb6a018e6282a0552356878a87561004f421fe787268206a.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - Drops file in Program Files directory
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2340
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\nwskrasg\cpifo.dll",Verify C:\Users\Admin\AppData\Local\Temp\bwbkj.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)
      Suspicious use of NtSetInformationThreadHideFromDebugger
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4020

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

C:\Users\Admin\AppData\Local\Temp\bwbkj.exe

Filesize
406KB

MD5
fe3ffc315027941bdf961d7db1a0a82e

SHA1
b44c37657627e5f7de4d3e6b128e37a9ce755df6

SHA256
af40a563b06f793abc151473fed1edb9f9349ec1ff51abcbae4eca6338718eac

SHA512
3791aac4cdb2c2814b9910f74c747bbaaf9dfb9002a0c99c0f836c6a883132eabd5ca9625df63bed590f58391b65726f324facf2d95c93375b0d0bbf40d3adae

Download Submit
\??\c:\Program Files\nwskrasg\cpifo.dll

Filesize
228KB

MD5
e270cf536536991d0382f75fac672877

SHA1
656d646cb5f5260d677547cf5c6bf804bdd80acb

SHA256
7453c4959533f6bb798112b0ca82c8be250cde00ad7710afa3e1d5fa8436c15e

SHA512
c856070667e47b07877c8ad952666ca6ac45cda3700ba1412f6dff7c32e2879de90861267ebc1418c81416f0afe79daf60369349dc7a044a7fd0508817d42ae3

Download Submit
memory/2340-7-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download
memory/3288-0-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download
memory/3288-2-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download
memory/4020-10-0x0000000010000000-0x0000000010080000-memory.dmp

Filesize
512KB

Download
memory/4020-11-0x0000000010000000-0x0000000010080000-memory.dmp

Filesize
512KB

Download
memory/4020-13-0x0000000010000000-0x0000000010080000-memory.dmp

Filesize
512KB

Download