1cae96dace01ef11ea003250d3cd9f9519821eff90e781fb6d179051ae7060fd

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 09:53

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General

Target

2024-05-23_6de4046f30c513f2907cfb8bcecd2eb5_cryptowall.exe
Size

129KB
MD5

6de4046f30c513f2907cfb8bcecd2eb5
SHA1

b382c47dc850dbb314224d29b83c454f42f4fbef
SHA256

1cae96dace01ef11ea003250d3cd9f9519821eff90e781fb6d179051ae7060fd
SHA512

6b13d1c553cc7d7555ae618c25d752a9315017e79de90cf9abdfc845f7c3dcbdd9d7d2a709da13e9c9fb2dbbd6483870dcbbff42f58e3d3f7545bc77223698d3
SSDEEP

3072:nhRpa+zd/EtzAAZ1rMAKlyDjH/B6SVqCgQfBUnPy8L66iiSB:nhbrdEt8ADrZDjH/B6SVqCgQfBUPy8Lu

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\b227d6b7.exe explorer.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\b227d6b7.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-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\b227d6b7 = "C:\\Users\\Admin\\AppData\\Roaming\\b227d6b7.exe"	explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\*227d6b7 = "C:\\Users\\Admin\\AppData\\Roaming\\b227d6b7.exe"	explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\b227d6b = "C:\\b227d6b7\\b227d6b7.exe"	explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\*227d6b = "C:\\b227d6b7\\b227d6b7.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

11 ip-addr.es
14 ip-addr.es
130 ip-addr.es
Suspicious behavior: MapViewOfSection 2 IoCs

Processes:

2024-05-23_6de4046f30c513f2907cfb8bcecd2eb5_cryptowall.exeexplorer.exe

pid process

2580 2024-05-23_6de4046f30c513f2907cfb8bcecd2eb5_cryptowall.exe
1192 explorer.exe

flow	ioc
11	ip-addr.es
14	ip-addr.es
130	ip-addr.es

pid	process
2580	2024-05-23_6de4046f30c513f2907cfb8bcecd2eb5_cryptowall.exe
1192	explorer.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

2024-05-23_6de4046f30c513f2907cfb8bcecd2eb5_cryptowall.exeexplorer.exe

description	pid	process	target process
PID 2580 wrote to memory of 1192	2580	2024-05-23_6de4046f30c513f2907cfb8bcecd2eb5_cryptowall.exe	explorer.exe
PID 2580 wrote to memory of 1192	2580	2024-05-23_6de4046f30c513f2907cfb8bcecd2eb5_cryptowall.exe	explorer.exe
PID 2580 wrote to memory of 1192	2580	2024-05-23_6de4046f30c513f2907cfb8bcecd2eb5_cryptowall.exe	explorer.exe
PID 1192 wrote to memory of 2340	1192	explorer.exe	svchost.exe
PID 1192 wrote to memory of 2340	1192	explorer.exe	svchost.exe
PID 1192 wrote to memory of 2340	1192	explorer.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_6de4046f30c513f2907cfb8bcecd2eb5_cryptowall.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_6de4046f30c513f2907cfb8bcecd2eb5_cryptowall.exe"
1⤵
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2580

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:1192

C:\Windows\SysWOW64\svchost.exe
-k netsvcs
3⤵
PID:2340

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1192-0-0x0000000000AF0000-0x0000000000B15000-memory.dmp

Filesize
148KB

Download
memory/1192-1-0x0000000000AF0000-0x0000000000B15000-memory.dmp

Filesize
148KB

Download
memory/2340-5-0x00000000006B0000-0x00000000006D5000-memory.dmp

Filesize
148KB

Download
memory/2340-6-0x00000000006B0000-0x00000000006D5000-memory.dmp

Filesize
148KB

Download
memory/2340-17-0x00000000006B0000-0x00000000006D5000-memory.dmp

Filesize
148KB

Download