a3d5715a81f2fbeb5f76c88c9c21eeee87142909716472f911ff6950c790c24d

Resubmissions

12/11/2023, 14:01

231112-rbzd8sgd3z 7

Analysis

max time kernel
18s
max time network
23s
platform
windows10-1703_x64
resource
win10-20231023-en
resource tags

arch:x64arch:x86image:win10-20231023-enlocale:en-usos:windows10-1703-x64system
submitted
12/11/2023, 14:01

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General

Target

MEMZ-Trojan.exe
Size

14KB
MD5

19dbec50735b5f2a72d4199c4e184960
SHA1

6fed7732f7cb6f59743795b2ab154a3676f4c822
SHA256

a3d5715a81f2fbeb5f76c88c9c21eeee87142909716472f911ff6950c790c24d
SHA512

aa8a6bbb1ec516d5d5acf8be6863a4c6c5d754cee12b3d374c3a6acb393376806edc422f0ffb661c210e5b9485da88521e4a0956a4b7b08a5467cfaacd90591d
SSDEEP

192:sIvxdXSQeWSg9JJS/lcIEiwqZKBkDFR43xWTM3LHn8f26gyr6yfFCj3r:sMVSaSEglcIqq3agmLc+6gyWqFCj

Score

6^/10

bootkit persistence

Malware Config

Signatures

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	MEMZ-Trojan.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\rescache\_merged\1601268389\3877292338.pri	taskmgr.exe
File created	C:\Windows\rescache\_merged\4183903823\810424605.pri	taskmgr.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Checks SCSI registry key(s) 3 TTPs 3 IoCs

SCSI information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000	taskmgr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\Properties\{b725f130-47ef-101a-a5f1-02608c9eebac}\000A	taskmgr.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\FriendlyName	taskmgr.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4992	MEMZ-Trojan.exe
4992	MEMZ-Trojan.exe
5088	MEMZ-Trojan.exe
5088	MEMZ-Trojan.exe
884	MEMZ-Trojan.exe
884	MEMZ-Trojan.exe
312	MEMZ-Trojan.exe
312	MEMZ-Trojan.exe
220	MEMZ-Trojan.exe
220	MEMZ-Trojan.exe
4992	MEMZ-Trojan.exe
4992	MEMZ-Trojan.exe
4992	MEMZ-Trojan.exe
4992	MEMZ-Trojan.exe
220	MEMZ-Trojan.exe
220	MEMZ-Trojan.exe
312	MEMZ-Trojan.exe
312	MEMZ-Trojan.exe
884	MEMZ-Trojan.exe
5088	MEMZ-Trojan.exe
884	MEMZ-Trojan.exe
5088	MEMZ-Trojan.exe
312	MEMZ-Trojan.exe
312	MEMZ-Trojan.exe
220	MEMZ-Trojan.exe
220	MEMZ-Trojan.exe
4992	MEMZ-Trojan.exe
4992	MEMZ-Trojan.exe
220	MEMZ-Trojan.exe
220	MEMZ-Trojan.exe
312	MEMZ-Trojan.exe
312	MEMZ-Trojan.exe
5088	MEMZ-Trojan.exe
5088	MEMZ-Trojan.exe
884	MEMZ-Trojan.exe
884	MEMZ-Trojan.exe
220	MEMZ-Trojan.exe
220	MEMZ-Trojan.exe
4992	MEMZ-Trojan.exe
4992	MEMZ-Trojan.exe
220	MEMZ-Trojan.exe
220	MEMZ-Trojan.exe
4992	MEMZ-Trojan.exe
4992	MEMZ-Trojan.exe
5088	MEMZ-Trojan.exe
5088	MEMZ-Trojan.exe
884	MEMZ-Trojan.exe
884	MEMZ-Trojan.exe
312	MEMZ-Trojan.exe
312	MEMZ-Trojan.exe
5088	MEMZ-Trojan.exe
5088	MEMZ-Trojan.exe
220	MEMZ-Trojan.exe
220	MEMZ-Trojan.exe
5088	MEMZ-Trojan.exe
5088	MEMZ-Trojan.exe
220	MEMZ-Trojan.exe
220	MEMZ-Trojan.exe
312	MEMZ-Trojan.exe
312	MEMZ-Trojan.exe
884	MEMZ-Trojan.exe
884	MEMZ-Trojan.exe
4992	MEMZ-Trojan.exe
4992	MEMZ-Trojan.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4544	taskmgr.exe
Token: SeSystemProfilePrivilege	4544	taskmgr.exe
Token: SeCreateGlobalPrivilege	4544	taskmgr.exe

Suspicious use of FindShellTrayWindow 26 IoCs

pid	Process
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe

Suspicious use of SendNotifyMessage 26 IoCs

pid	Process
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe
4544	taskmgr.exe

Suspicious use of SetWindowsHookEx 64 IoCs

pid	Process
2484	MEMZ-Trojan.exe
220	MEMZ-Trojan.exe
884	MEMZ-Trojan.exe
312	MEMZ-Trojan.exe
4992	MEMZ-Trojan.exe
220	MEMZ-Trojan.exe
884	MEMZ-Trojan.exe
4992	MEMZ-Trojan.exe
312	MEMZ-Trojan.exe
884	MEMZ-Trojan.exe
220	MEMZ-Trojan.exe
4992	MEMZ-Trojan.exe
312	MEMZ-Trojan.exe
884	MEMZ-Trojan.exe
220	MEMZ-Trojan.exe
4992	MEMZ-Trojan.exe
312	MEMZ-Trojan.exe
884	MEMZ-Trojan.exe
220	MEMZ-Trojan.exe
312	MEMZ-Trojan.exe
4992	MEMZ-Trojan.exe
884	MEMZ-Trojan.exe
220	MEMZ-Trojan.exe
4992	MEMZ-Trojan.exe
312	MEMZ-Trojan.exe
220	MEMZ-Trojan.exe
884	MEMZ-Trojan.exe
312	MEMZ-Trojan.exe
4992	MEMZ-Trojan.exe
220	MEMZ-Trojan.exe
884	MEMZ-Trojan.exe
4992	MEMZ-Trojan.exe
312	MEMZ-Trojan.exe
884	MEMZ-Trojan.exe
220	MEMZ-Trojan.exe
312	MEMZ-Trojan.exe
4992	MEMZ-Trojan.exe
312	MEMZ-Trojan.exe
4992	MEMZ-Trojan.exe
220	MEMZ-Trojan.exe
884	MEMZ-Trojan.exe
884	MEMZ-Trojan.exe
220	MEMZ-Trojan.exe
312	MEMZ-Trojan.exe
4992	MEMZ-Trojan.exe
312	MEMZ-Trojan.exe
884	MEMZ-Trojan.exe
4992	MEMZ-Trojan.exe
220	MEMZ-Trojan.exe
884	MEMZ-Trojan.exe
4992	MEMZ-Trojan.exe
220	MEMZ-Trojan.exe
312	MEMZ-Trojan.exe
312	MEMZ-Trojan.exe
220	MEMZ-Trojan.exe
884	MEMZ-Trojan.exe
4992	MEMZ-Trojan.exe
884	MEMZ-Trojan.exe
4992	MEMZ-Trojan.exe
220	MEMZ-Trojan.exe
312	MEMZ-Trojan.exe
312	MEMZ-Trojan.exe
4992	MEMZ-Trojan.exe
220	MEMZ-Trojan.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 352 wrote to memory of 220	352	MEMZ-Trojan.exe	76
PID 352 wrote to memory of 220	352	MEMZ-Trojan.exe	76
PID 352 wrote to memory of 220	352	MEMZ-Trojan.exe	76
PID 352 wrote to memory of 312	352	MEMZ-Trojan.exe	72
PID 352 wrote to memory of 312	352	MEMZ-Trojan.exe	72
PID 352 wrote to memory of 312	352	MEMZ-Trojan.exe	72
PID 352 wrote to memory of 884	352	MEMZ-Trojan.exe	71
PID 352 wrote to memory of 884	352	MEMZ-Trojan.exe	71
PID 352 wrote to memory of 884	352	MEMZ-Trojan.exe	71
PID 352 wrote to memory of 5088	352	MEMZ-Trojan.exe	73
PID 352 wrote to memory of 5088	352	MEMZ-Trojan.exe	73
PID 352 wrote to memory of 5088	352	MEMZ-Trojan.exe	73
PID 352 wrote to memory of 4992	352	MEMZ-Trojan.exe	74
PID 352 wrote to memory of 4992	352	MEMZ-Trojan.exe	74
PID 352 wrote to memory of 4992	352	MEMZ-Trojan.exe	74
PID 352 wrote to memory of 2484	352	MEMZ-Trojan.exe	75
PID 352 wrote to memory of 2484	352	MEMZ-Trojan.exe	75
PID 352 wrote to memory of 2484	352	MEMZ-Trojan.exe	75
PID 2484 wrote to memory of 32	2484	MEMZ-Trojan.exe	78
PID 2484 wrote to memory of 32	2484	MEMZ-Trojan.exe	78
PID 2484 wrote to memory of 32	2484	MEMZ-Trojan.exe	78

C:\Users\Admin\AppData\Local\Temp\MEMZ-Trojan.exe
"C:\Users\Admin\AppData\Local\Temp\MEMZ-Trojan.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:352
- C:\Users\Admin\AppData\Local\Temp\MEMZ-Trojan.exe
  "C:\Users\Admin\AppData\Local\Temp\MEMZ-Trojan.exe" /watchdog
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  PID:884
- C:\Users\Admin\AppData\Local\Temp\MEMZ-Trojan.exe
  "C:\Users\Admin\AppData\Local\Temp\MEMZ-Trojan.exe" /watchdog
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  PID:312
- C:\Users\Admin\AppData\Local\Temp\MEMZ-Trojan.exe
  "C:\Users\Admin\AppData\Local\Temp\MEMZ-Trojan.exe" /watchdog
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:5088
- C:\Users\Admin\AppData\Local\Temp\MEMZ-Trojan.exe
  "C:\Users\Admin\AppData\Local\Temp\MEMZ-Trojan.exe" /watchdog
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  PID:4992
- C:\Users\Admin\AppData\Local\Temp\MEMZ-Trojan.exe
  "C:\Users\Admin\AppData\Local\Temp\MEMZ-Trojan.exe" /main
  2⤵
  - Writes to the Master Boot Record (MBR)
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2484
- - C:\Windows\SysWOW64\notepad.exe
    "C:\Windows\System32\notepad.exe" \note.txt
    3⤵
    PID:32
- C:\Users\Admin\AppData\Local\Temp\MEMZ-Trojan.exe
  "C:\Users\Admin\AppData\Local\Temp\MEMZ-Trojan.exe" /watchdog
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  PID:220

C:\Windows\system32\taskmgr.exe
"C:\Windows\system32\taskmgr.exe" /4
1⤵
- Drops file in Windows directory
- Checks SCSI registry key(s)
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:4544

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Defense Evasion

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\note.txt

Filesize
218B

MD5
afa6955439b8d516721231029fb9ca1b

SHA1
087a043cc123c0c0df2ffadcf8e71e3ac86bbae9

SHA256
8e9f20f6864c66576536c0b866c6ffdcf11397db67fe120e972e244c3c022270

SHA512
5da21a31fbc4e8250dffed30f66b896bdf007ac91948140334fe36a3f010e1bac3e70a07e9f3eb9da8633189091fd5cadcabbaacd3e01da0fe7ae28a11b3dddf

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