4f85cd4bc4743dad3c0dffa0f90eb9359e8924a03307904949548af183caa431

Analysis

max time kernel
42s
max time network
47s
platform
windows7_x64
resource
win7-20220718-en
resource tags

arch:x64arch:x86image:win7-20220718-enlocale:en-usos:windows7-x64system
submitted
19-07-2022 22:47

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General

Target

4f85cd4bc4743dad3c0dffa0f90eb9359e8924a03307904949548af183caa431.exe
Size

259KB
MD5

29d3c08d5f9fcbbef6ea5493907f91d8
SHA1

7bd1a9c718eed2a9283deaad8cd1421436f3445a
SHA256

4f85cd4bc4743dad3c0dffa0f90eb9359e8924a03307904949548af183caa431
SHA512

3b603f0cee8643b5dc50dc1a4d018f4c474ccb767e222440a54e393179e326897a512c045a61042e185ab804b344d2cf77065ba6ff224627597836ceb93f28e7

Score

8^/10

persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1608	winbrbk.exe

Loads dropped DLL 2 IoCs

pid	Process
1480	4f85cd4bc4743dad3c0dffa0f90eb9359e8924a03307904949548af183caa431.exe
1480	4f85cd4bc4743dad3c0dffa0f90eb9359e8924a03307904949548af183caa431.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 8970679586 = "C:\\Windows\\5160829812129427\\winbrbk.exe"	4f85cd4bc4743dad3c0dffa0f90eb9359e8924a03307904949548af183caa431.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3762437355-3468409815-1164039494-1000\Software\Microsoft\Windows\CurrentVersion\Run\Windows Update 8970679586 = "C:\\Windows\\5160829812129427\\winbrbk.exe"	4f85cd4bc4743dad3c0dffa0f90eb9359e8924a03307904949548af183caa431.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\5160829812129427\winbrbk.exe	4f85cd4bc4743dad3c0dffa0f90eb9359e8924a03307904949548af183caa431.exe
File opened for modification	C:\Windows\5160829812129427\winbrbk.exe	4f85cd4bc4743dad3c0dffa0f90eb9359e8924a03307904949548af183caa431.exe
File opened for modification	C:\Windows\5160829812129427	4f85cd4bc4743dad3c0dffa0f90eb9359e8924a03307904949548af183caa431.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1480 wrote to memory of 1608	1480	4f85cd4bc4743dad3c0dffa0f90eb9359e8924a03307904949548af183caa431.exe	28
PID 1480 wrote to memory of 1608	1480	4f85cd4bc4743dad3c0dffa0f90eb9359e8924a03307904949548af183caa431.exe	28
PID 1480 wrote to memory of 1608	1480	4f85cd4bc4743dad3c0dffa0f90eb9359e8924a03307904949548af183caa431.exe	28
PID 1480 wrote to memory of 1608	1480	4f85cd4bc4743dad3c0dffa0f90eb9359e8924a03307904949548af183caa431.exe	28

C:\Users\Admin\AppData\Local\Temp\4f85cd4bc4743dad3c0dffa0f90eb9359e8924a03307904949548af183caa431.exe
"C:\Users\Admin\AppData\Local\Temp\4f85cd4bc4743dad3c0dffa0f90eb9359e8924a03307904949548af183caa431.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1480
- C:\Windows\5160829812129427\winbrbk.exe
  C:\Windows\5160829812129427\winbrbk.exe
  2⤵
  - Executes dropped EXE
  PID:1608

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\5160829812129427\winbrbk.exe

Filesize
259KB

MD5
29d3c08d5f9fcbbef6ea5493907f91d8

SHA1
7bd1a9c718eed2a9283deaad8cd1421436f3445a

SHA256
4f85cd4bc4743dad3c0dffa0f90eb9359e8924a03307904949548af183caa431

SHA512
3b603f0cee8643b5dc50dc1a4d018f4c474ccb767e222440a54e393179e326897a512c045a61042e185ab804b344d2cf77065ba6ff224627597836ceb93f28e7

Download Submit
\Windows\5160829812129427\winbrbk.exe

Filesize
259KB

MD5
29d3c08d5f9fcbbef6ea5493907f91d8

SHA1
7bd1a9c718eed2a9283deaad8cd1421436f3445a

SHA256
4f85cd4bc4743dad3c0dffa0f90eb9359e8924a03307904949548af183caa431

SHA512
3b603f0cee8643b5dc50dc1a4d018f4c474ccb767e222440a54e393179e326897a512c045a61042e185ab804b344d2cf77065ba6ff224627597836ceb93f28e7

Download Submit
\Windows\5160829812129427\winbrbk.exe

Filesize
259KB

MD5
29d3c08d5f9fcbbef6ea5493907f91d8

SHA1
7bd1a9c718eed2a9283deaad8cd1421436f3445a

SHA256
4f85cd4bc4743dad3c0dffa0f90eb9359e8924a03307904949548af183caa431

SHA512
3b603f0cee8643b5dc50dc1a4d018f4c474ccb767e222440a54e393179e326897a512c045a61042e185ab804b344d2cf77065ba6ff224627597836ceb93f28e7

Download Submit
memory/1480-54-0x0000000005407000-0x000000000540E000-memory.dmp

Filesize
28KB

Download
memory/1480-55-0x00000000760F1000-0x00000000760F3000-memory.dmp

Filesize
8KB

Download
memory/1480-56-0x0000000005407000-0x000000000540E000-memory.dmp

Filesize
28KB

Download
memory/1480-57-0x0000000000400000-0x00000000052A0000-memory.dmp

Filesize
78.6MB

Download
memory/1608-62-0x00000000053B7000-0x00000000053BD000-memory.dmp

Filesize
24KB

Download
memory/1608-64-0x00000000053B7000-0x00000000053BD000-memory.dmp

Filesize
24KB

Download
memory/1608-65-0x0000000000400000-0x00000000052A0000-memory.dmp

Filesize
78.6MB

Download