0b432f20d54647f077811ecb1df4dbc64fb17fbd6a9e0cce4ac9437d5f7891fb

Resubmissions

18-03-2024 22:36

240318-2h9hwsba88 10

Analysis

max time kernel
1783s
max time network
1805s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
18-03-2024 22:36

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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\3330543f.exe explorer.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\3330543f.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-1-5-21-513485977-2495024337-1260977654-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\3330543 = "C:\\3330543f\\3330543f.exe"	explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-513485977-2495024337-1260977654-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\*330543 = "C:\\3330543f\\3330543f.exe"	explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-513485977-2495024337-1260977654-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\3330543f = "C:\\Users\\Admin\\AppData\\Roaming\\3330543f.exe"	explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-513485977-2495024337-1260977654-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\*330543f = "C:\\Users\\Admin\\AppData\\Roaming\\3330543f.exe"	explorer.exe

Looks up external IP address via web service 18 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow	ioc
92	ip-addr.es
124	ip-addr.es
144	ip-addr.es
181	ip-addr.es
190	ip-addr.es
115	ip-addr.es
134	ip-addr.es
171	ip-addr.es
199	ip-addr.es
208	ip-addr.es
23	ip-addr.es
31	ip-addr.es
103	ip-addr.es
162	ip-addr.es
227	ip-addr.es
153	ip-addr.es
218	ip-addr.es
236	ip-addr.es

Suspicious behavior: MapViewOfSection 2 IoCs

Processes:

CryptoWall.exeexplorer.exe

pid process

232 CryptoWall.exe
5108 explorer.exe

pid	process
232	CryptoWall.exe
5108	explorer.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

CryptoWall.exeexplorer.exe

description	pid	process	target process
PID 232 wrote to memory of 5108	232	CryptoWall.exe	explorer.exe
PID 232 wrote to memory of 5108	232	CryptoWall.exe	explorer.exe
PID 232 wrote to memory of 5108	232	CryptoWall.exe	explorer.exe
PID 5108 wrote to memory of 1836	5108	explorer.exe	svchost.exe
PID 5108 wrote to memory of 1836	5108	explorer.exe	svchost.exe
PID 5108 wrote to memory of 1836	5108	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:232

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:5108

C:\Windows\SysWOW64\svchost.exe
-k netsvcs
3⤵
PID:1836

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/1836-5-0x00000000001C0000-0x00000000001E5000-memory.dmp

Filesize
148KB

Download
memory/1836-6-0x00000000001C0000-0x00000000001E5000-memory.dmp

Filesize
148KB

Download
memory/1836-11-0x00000000001C0000-0x00000000001E5000-memory.dmp

Filesize
148KB

Download
memory/5108-0-0x0000000001200000-0x0000000001225000-memory.dmp

Filesize
148KB

Download
memory/5108-1-0x0000000001200000-0x0000000001225000-memory.dmp

Filesize
148KB

Download