b4f292c77b8675d51f1e158f1e255ad56bfc2b4acda8442ab134baf0682123a3

Analysis

max time kernel
74s
max time network
137s
platform
windows10-2004_x64
resource
win10v2004-20220721-en
resource tags

arch:x64arch:x86image:win10v2004-20220721-enlocale:en-usos:windows10-2004-x64system
submitted
24/07/2022, 17:29

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General

Target

b4f292c77b8675d51f1e158f1e255ad56bfc2b4acda8442ab134baf0682123a3.exe
Size

169KB
MD5

627e55ad2eb61369511b9a5cfa717468
SHA1

320c4f96b71f4e9adb8f0e5c6bf4eb6e4c7cc4dc
SHA256

b4f292c77b8675d51f1e158f1e255ad56bfc2b4acda8442ab134baf0682123a3
SHA512

a4cafc01b06c70987afc9eca0eeb3c0a03711670e93a48e26e7eb8d7962095b3d465b6a097cd221fe54870bf0ccb395582b0f0404601a120de54b15ff6e1d466

Score

8^/10

persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4432	wintwvn.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Windows Update 7080607400 = "C:\\Windows\\10591242812262893\\wintwvn.exe"	b4f292c77b8675d51f1e158f1e255ad56bfc2b4acda8442ab134baf0682123a3.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2372564722-193526734-2636556182-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Update 7080607400 = "C:\\Windows\\10591242812262893\\wintwvn.exe"	b4f292c77b8675d51f1e158f1e255ad56bfc2b4acda8442ab134baf0682123a3.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\10591242812262893	b4f292c77b8675d51f1e158f1e255ad56bfc2b4acda8442ab134baf0682123a3.exe
File created	C:\Windows\10591242812262893\wintwvn.exe	b4f292c77b8675d51f1e158f1e255ad56bfc2b4acda8442ab134baf0682123a3.exe
File opened for modification	C:\Windows\10591242812262893\wintwvn.exe	b4f292c77b8675d51f1e158f1e255ad56bfc2b4acda8442ab134baf0682123a3.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
3060	4328	WerFault.exe	16
5036	4432	WerFault.exe	83

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4328 wrote to memory of 4432	4328	b4f292c77b8675d51f1e158f1e255ad56bfc2b4acda8442ab134baf0682123a3.exe	83
PID 4328 wrote to memory of 4432	4328	b4f292c77b8675d51f1e158f1e255ad56bfc2b4acda8442ab134baf0682123a3.exe	83
PID 4328 wrote to memory of 4432	4328	b4f292c77b8675d51f1e158f1e255ad56bfc2b4acda8442ab134baf0682123a3.exe	83

C:\Users\Admin\AppData\Local\Temp\b4f292c77b8675d51f1e158f1e255ad56bfc2b4acda8442ab134baf0682123a3.exe
"C:\Users\Admin\AppData\Local\Temp\b4f292c77b8675d51f1e158f1e255ad56bfc2b4acda8442ab134baf0682123a3.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:4328
- C:\Windows\10591242812262893\wintwvn.exe
  C:\Windows\10591242812262893\wintwvn.exe
  2⤵
  - Executes dropped EXE
  PID:4432
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4432 -s 428
    3⤵
    - Program crash
    PID:5036
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4328 -s 460
  2⤵
  - Program crash
  PID:3060

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 4328 -ip 4328
1⤵
PID:4424

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 564 -p 4432 -ip 4432
1⤵
PID:4036

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

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\10591242812262893\wintwvn.exe

Filesize
169KB

MD5
627e55ad2eb61369511b9a5cfa717468

SHA1
320c4f96b71f4e9adb8f0e5c6bf4eb6e4c7cc4dc

SHA256
b4f292c77b8675d51f1e158f1e255ad56bfc2b4acda8442ab134baf0682123a3

SHA512
a4cafc01b06c70987afc9eca0eeb3c0a03711670e93a48e26e7eb8d7962095b3d465b6a097cd221fe54870bf0ccb395582b0f0404601a120de54b15ff6e1d466

Download Submit
C:\Windows\10591242812262893\wintwvn.exe

Filesize
169KB

MD5
627e55ad2eb61369511b9a5cfa717468

SHA1
320c4f96b71f4e9adb8f0e5c6bf4eb6e4c7cc4dc

SHA256
b4f292c77b8675d51f1e158f1e255ad56bfc2b4acda8442ab134baf0682123a3

SHA512
a4cafc01b06c70987afc9eca0eeb3c0a03711670e93a48e26e7eb8d7962095b3d465b6a097cd221fe54870bf0ccb395582b0f0404601a120de54b15ff6e1d466

Download Submit
memory/4328-130-0x0000000000AE2000-0x0000000000AE7000-memory.dmp

Filesize
20KB

Download
memory/4328-131-0x0000000000AE2000-0x0000000000AE7000-memory.dmp

Filesize
20KB

Download
memory/4328-132-0x0000000000400000-0x000000000083A000-memory.dmp

Filesize
4.2MB

Download
memory/4432-136-0x0000000000BC3000-0x0000000000BC8000-memory.dmp

Filesize
20KB

Download
memory/4432-137-0x0000000000BC3000-0x0000000000BC8000-memory.dmp

Filesize
20KB

Download
memory/4432-138-0x0000000000400000-0x000000000083A000-memory.dmp

Filesize
4.2MB

Download