b92a73dafe4847c635d031f9a0a4963d32336f65e179a49050c2bf8dc97d800d

Analysis

max time kernel
103s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
29/11/2022, 13:06

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General

Target

b92a73dafe4847c635d031f9a0a4963d32336f65e179a49050c2bf8dc97d800d.exe
Size

140KB
MD5

ba8db3db1620653c676f80e8f79bff06
SHA1

43fdead135ad02559ee63904fb144f38ce48171b
SHA256

b92a73dafe4847c635d031f9a0a4963d32336f65e179a49050c2bf8dc97d800d
SHA512

113077f5941ed690df17697f5570075563f12d1e880c8013c586d5db428bd4a863bfaddd6dc7f2c1de99a2ceb78cc35b831d671f409ae8fb2974357391080423
SSDEEP

3072:jlIgGTD+E3ZwOx1yh9SdADxL0yYSsU4JKTBfjlyg//c:jlITTDXNyhDayYSsWTB7lyg//

Score

8^/10

evasion persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
3276	noskrnl.exe

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Modify Existing Service

T1031

pid	Process
1420	netsh.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\noskrnl = "C:\\Windows\\noskrnl.exe"	b92a73dafe4847c635d031f9a0a4963d32336f65e179a49050c2bf8dc97d800d.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\noskrnl.sys	noskrnl.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\noskrnl.config	noskrnl.exe
File created	C:\Windows\noskrnl.exe	b92a73dafe4847c635d031f9a0a4963d32336f65e179a49050c2bf8dc97d800d.exe
File opened for modification	C:\Windows\noskrnl.exe	b92a73dafe4847c635d031f9a0a4963d32336f65e179a49050c2bf8dc97d800d.exe
File created	C:\Windows\noskrnl.config	noskrnl.exe

Suspicious behavior: LoadsDriver 1 IoCs

pid	Process
668	Process not Found

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2804 wrote to memory of 1152	2804	b92a73dafe4847c635d031f9a0a4963d32336f65e179a49050c2bf8dc97d800d.exe	82
PID 2804 wrote to memory of 1152	2804	b92a73dafe4847c635d031f9a0a4963d32336f65e179a49050c2bf8dc97d800d.exe	82
PID 2804 wrote to memory of 1152	2804	b92a73dafe4847c635d031f9a0a4963d32336f65e179a49050c2bf8dc97d800d.exe	82
PID 2804 wrote to memory of 1128	2804	b92a73dafe4847c635d031f9a0a4963d32336f65e179a49050c2bf8dc97d800d.exe	83
PID 2804 wrote to memory of 1128	2804	b92a73dafe4847c635d031f9a0a4963d32336f65e179a49050c2bf8dc97d800d.exe	83
PID 2804 wrote to memory of 1128	2804	b92a73dafe4847c635d031f9a0a4963d32336f65e179a49050c2bf8dc97d800d.exe	83
PID 2804 wrote to memory of 3276	2804	b92a73dafe4847c635d031f9a0a4963d32336f65e179a49050c2bf8dc97d800d.exe	86
PID 2804 wrote to memory of 3276	2804	b92a73dafe4847c635d031f9a0a4963d32336f65e179a49050c2bf8dc97d800d.exe	86
PID 2804 wrote to memory of 3276	2804	b92a73dafe4847c635d031f9a0a4963d32336f65e179a49050c2bf8dc97d800d.exe	86
PID 1128 wrote to memory of 1780	1128	w32tm.exe	90
PID 1128 wrote to memory of 1780	1128	w32tm.exe	90
PID 3276 wrote to memory of 1420	3276	noskrnl.exe	87
PID 3276 wrote to memory of 1420	3276	noskrnl.exe	87
PID 3276 wrote to memory of 1420	3276	noskrnl.exe	87
PID 1152 wrote to memory of 4072	1152	w32tm.exe	88
PID 1152 wrote to memory of 4072	1152	w32tm.exe	88

C:\Users\Admin\AppData\Local\Temp\b92a73dafe4847c635d031f9a0a4963d32336f65e179a49050c2bf8dc97d800d.exe
"C:\Users\Admin\AppData\Local\Temp\b92a73dafe4847c635d031f9a0a4963d32336f65e179a49050c2bf8dc97d800d.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2804
- C:\Windows\SysWOW64\w32tm.exe
  w32tm /config /syncfromflags:manual /manualpeerlist:time.windows.com,time.nist.gov
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1152
- - C:\Windows\system32\w32tm.exe
    w32tm /config /syncfromflags:manual /manualpeerlist:time.windows.com,time.nist.gov
    3⤵
    PID:4072
- C:\Windows\SysWOW64\w32tm.exe
  w32tm /config /update
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1128
- - C:\Windows\system32\w32tm.exe
    w32tm /config /update
    3⤵
    PID:1780
- C:\Windows\noskrnl.exe
  "C:\Windows\noskrnl.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:3276
- - C:\Windows\SysWOW64\netsh.exe
    netsh firewall set allowedprogram "C:\Windows\noskrnl.exe" enable
    3⤵
    - Modifies Windows Firewall
    PID:1420

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

T1031

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\noskrnl.exe

Filesize
140KB

MD5
ba8db3db1620653c676f80e8f79bff06

SHA1
43fdead135ad02559ee63904fb144f38ce48171b

SHA256
b92a73dafe4847c635d031f9a0a4963d32336f65e179a49050c2bf8dc97d800d

SHA512
113077f5941ed690df17697f5570075563f12d1e880c8013c586d5db428bd4a863bfaddd6dc7f2c1de99a2ceb78cc35b831d671f409ae8fb2974357391080423

Download Submit
C:\Windows\noskrnl.exe

Filesize
140KB

MD5
ba8db3db1620653c676f80e8f79bff06

SHA1
43fdead135ad02559ee63904fb144f38ce48171b

SHA256
b92a73dafe4847c635d031f9a0a4963d32336f65e179a49050c2bf8dc97d800d

SHA512
113077f5941ed690df17697f5570075563f12d1e880c8013c586d5db428bd4a863bfaddd6dc7f2c1de99a2ceb78cc35b831d671f409ae8fb2974357391080423

Download Submit
memory/2804-137-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download