0b432f20d54647f077811ecb1df4dbc64fb17fbd6a9e0cce4ac9437d5f7891fb

Resubmissions

06/04/2024, 15:10

240406-skgq8adf56

18/03/2024, 22:36

240318-2h9hwsba8810

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
Sample240318-2h9hwsba88
SHA256 e036d68b8f8b7afc6c8b6252876e1e290f11a26d4ad18ac6f310662845b2c734
MD5 919034c8efb9678f96b47a20fa6199f2
SHA1 747070c74d0400cffeb28fbea17b64297f14cfbd
SHA512 745a81c50bbfd62234edb9788c83a22e0588c5d25c00881901923a02d7096c71ef5f0cd5b73f92ad974e5174de064b0c5ea8044509039aab14b2aed83735a7c4
SSDEEP 3072:naRQpzd/99wen3XgWorw8I3h8LkMvqCgQfBUnPy8L6kssU:nJdTwo30ri3h8LkMvqCgQfBUPy8L6ksP
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

persistence

Malware Config

Signatures

Drops startup file 1 IoCs

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

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.

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

pid	Process
232	CryptoWall.exe
5108	explorer.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 232 wrote to memory of 5108	232	CryptoWall.exe	88
PID 232 wrote to memory of 5108	232	CryptoWall.exe	88
PID 232 wrote to memory of 5108	232	CryptoWall.exe	88
PID 5108 wrote to memory of 1836	5108	explorer.exe	92
PID 5108 wrote to memory of 1836	5108	explorer.exe	92
PID 5108 wrote to memory of 1836	5108	explorer.exe	92

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 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

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Downloads

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

Download

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

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

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

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

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Resubmissions

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads