022728f678d8dcc6cba20147595ed4099e9c98be0582c0f67518d5664e3b8523

Analysis

max time kernel
147s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-uk
resource tags

arch:x64arch:x86image:win10v2004-20240226-uklocale:uk-uaos:windows10-2004-x64systemwindows
submitted
03-03-2024 13:53

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General

Target

Ransomware/CryptoWall.exe
Size

132KB
MD5

919034c8efb9678f96b47a20fa6199f2
SHA1

747070c74d0400cffeb28fbea17b64297f14cfbd
SHA256

e036d68b8f8b7afc6c8b6252876e1e290f11a26d4ad18ac6f310662845b2c734
SHA512

745a81c50bbfd62234edb9788c83a22e0588c5d25c00881901923a02d7096c71ef5f0cd5b73f92ad974e5174de064b0c5ea8044509039aab14b2aed83735a7c4
SSDEEP

3072:naRQpzd/99wen3XgWorw8I3h8LkMvqCgQfBUnPy8L6kssU:nJdTwo30ri3h8LkMvqCgQfBUPy8L6ksP

Score

7^/10

persistence

Malware Config

Signatures

Drops startup file 1 IoCs

Processes:

explorer.exe

description ioc process

File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\4c6cde1c.exe explorer.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\4c6cde1c.exe	explorer.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

explorer.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3270530367-132075249-2153716227-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\*c6cde1 = "C:\\4c6cde1c\\4c6cde1c.exe"	explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3270530367-132075249-2153716227-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\4c6cde1c = "C:\\Users\\Admin\\AppData\\Roaming\\4c6cde1c.exe"	explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3270530367-132075249-2153716227-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\*c6cde1c = "C:\\Users\\Admin\\AppData\\Roaming\\4c6cde1c.exe"	explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3270530367-132075249-2153716227-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\4c6cde1 = "C:\\4c6cde1c\\4c6cde1c.exe"	explorer.exe

Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

17 ip-addr.es
19 ip-addr.es
51 ip-addr.es
Suspicious behavior: MapViewOfSection 2 IoCs

Processes:

CryptoWall.exeexplorer.exe

pid process

3764 CryptoWall.exe
5104 explorer.exe

flow	ioc
17	ip-addr.es
19	ip-addr.es
51	ip-addr.es

pid	process
3764	CryptoWall.exe
5104	explorer.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

CryptoWall.exeexplorer.exe

description	pid	process	target process
PID 3764 wrote to memory of 5104	3764	CryptoWall.exe	explorer.exe
PID 3764 wrote to memory of 5104	3764	CryptoWall.exe	explorer.exe
PID 3764 wrote to memory of 5104	3764	CryptoWall.exe	explorer.exe
PID 5104 wrote to memory of 4932	5104	explorer.exe	svchost.exe
PID 5104 wrote to memory of 4932	5104	explorer.exe	svchost.exe
PID 5104 wrote to memory of 4932	5104	explorer.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\Ransomware\CryptoWall.exe
"C:\Users\Admin\AppData\Local\Temp\Ransomware\CryptoWall.exe"
1⤵
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3764

C:\Windows\SysWOW64\explorer.exe
"C:\Windows\syswow64\explorer.exe"
2⤵
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:5104

C:\Windows\SysWOW64\svchost.exe
-k netsvcs
3⤵
PID:4932

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

memory/4932-5-0x0000000000D30000-0x0000000000D55000-memory.dmp

Filesize
148KB

Download
memory/4932-6-0x0000000000D30000-0x0000000000D55000-memory.dmp

Filesize
148KB

Download
memory/4932-11-0x0000000000D30000-0x0000000000D55000-memory.dmp

Filesize
148KB

Download
memory/5104-0-0x0000000000D20000-0x0000000000D45000-memory.dmp

Filesize
148KB

Download
memory/5104-1-0x0000000000D20000-0x0000000000D45000-memory.dmp

Filesize
148KB

Download