9e4ead97bc01dea4219d43098916e5212120264fd60af0d2bdc3a3a268313155

Analysis

max time kernel
200s
max time network
119s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
05/12/2022, 10:57

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General

Target

9e4ead97bc01dea4219d43098916e5212120264fd60af0d2bdc3a3a268313155.exe
Size

138KB
MD5

743f3e4ad35f4e17a9951db808954955
SHA1

6f3c61f9fc025d31689fbe179d97c7916735057c
SHA256

9e4ead97bc01dea4219d43098916e5212120264fd60af0d2bdc3a3a268313155
SHA512

3b36780759c0eb7bf011618fc46ef4beb322bf9eeddca8a42631a06443e773e6f68b4f536cf9466900c70ea33e60d817f760a88a8a0b3c3cea366c740f122384
SSDEEP

3072:VBYqATWne3lWRkNpZHPImtS5Es2K9Tbw9yDx9ZP61JN:z3Af3lsk7BPXS5Es2ATbwivZP61

Score

8^/10

bootkit persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1148	Wi4352t.exe

Deletes itself 1 IoCs

pid	Process
948	cmd.exe

Writes to the Master Boot Record (MBR) 1 TTPs 2 IoCs

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

bootkit persistence

Bootkit

T1067

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	9e4ead97bc01dea4219d43098916e5212120264fd60af0d2bdc3a3a268313155.exe
File opened for modification	\??\PhysicalDrive0	Wi4352t.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\Wi4352t.exe	9e4ead97bc01dea4219d43098916e5212120264fd60af0d2bdc3a3a268313155.exe
File opened for modification	C:\Windows\SysWOW64\Wi4352t.exe	9e4ead97bc01dea4219d43098916e5212120264fd60af0d2bdc3a3a268313155.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	Wi4352t.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	Wi4352t.exe

Modifies registry class 6 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.key	9e4ead97bc01dea4219d43098916e5212120264fd60af0d2bdc3a3a268313155.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.key\	9e4ead97bc01dea4219d43098916e5212120264fd60af0d2bdc3a3a268313155.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.key\ = "regfile"	9e4ead97bc01dea4219d43098916e5212120264fd60af0d2bdc3a3a268313155.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.key	Wi4352t.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.key\	Wi4352t.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.key\ = "regfile"	Wi4352t.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	1936	9e4ead97bc01dea4219d43098916e5212120264fd60af0d2bdc3a3a268313155.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1936 wrote to memory of 948	1936	9e4ead97bc01dea4219d43098916e5212120264fd60af0d2bdc3a3a268313155.exe	29
PID 1936 wrote to memory of 948	1936	9e4ead97bc01dea4219d43098916e5212120264fd60af0d2bdc3a3a268313155.exe	29
PID 1936 wrote to memory of 948	1936	9e4ead97bc01dea4219d43098916e5212120264fd60af0d2bdc3a3a268313155.exe	29
PID 1936 wrote to memory of 948	1936	9e4ead97bc01dea4219d43098916e5212120264fd60af0d2bdc3a3a268313155.exe	29

C:\Users\Admin\AppData\Local\Temp\9e4ead97bc01dea4219d43098916e5212120264fd60af0d2bdc3a3a268313155.exe
"C:\Users\Admin\AppData\Local\Temp\9e4ead97bc01dea4219d43098916e5212120264fd60af0d2bdc3a3a268313155.exe"
1⤵
- Writes to the Master Boot Record (MBR)
- Drops file in System32 directory
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1936
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c del C:\Users\Admin\AppData\Local\Temp\9E4EAD~1.EXE > nul
  2⤵
  - Deletes itself
  PID:948

C:\Windows\SysWOW64\Wi4352t.exe
C:\Windows\SysWOW64\Wi4352t.exe
1⤵
- Executes dropped EXE
- Writes to the Master Boot Record (MBR)
- Checks processor information in registry
- Modifies registry class
PID:1148

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Bootkit

T1067

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\SysWOW64\Wi4352t.exe

Filesize
138KB

MD5
743f3e4ad35f4e17a9951db808954955

SHA1
6f3c61f9fc025d31689fbe179d97c7916735057c

SHA256
9e4ead97bc01dea4219d43098916e5212120264fd60af0d2bdc3a3a268313155

SHA512
3b36780759c0eb7bf011618fc46ef4beb322bf9eeddca8a42631a06443e773e6f68b4f536cf9466900c70ea33e60d817f760a88a8a0b3c3cea366c740f122384

Download Submit
memory/1148-62-0x0000000000400000-0x0000000000428000-memory.dmp

Filesize
160KB

Download
memory/1148-63-0x0000000000250000-0x0000000000280000-memory.dmp

Filesize
192KB

Download
memory/1936-54-0x0000000000400000-0x0000000000428000-memory.dmp

Filesize
160KB

Download
memory/1936-55-0x00000000002F0000-0x0000000000320000-memory.dmp

Filesize
192KB

Download
memory/1936-56-0x00000000003E0000-0x00000000003E3000-memory.dmp

Filesize
12KB

Download
memory/1936-57-0x0000000000400000-0x0000000000428000-memory.dmp

Filesize
160KB

Download
memory/1936-60-0x0000000000400000-0x0000000000428000-memory.dmp

Filesize
160KB

Download
memory/1936-61-0x00000000002F0000-0x0000000000320000-memory.dmp

Filesize
192KB

Download