| File name: | Chaos Ransomware Builder v5.1.exe |
| Full analysis: | https://app.any.run/tasks/2fa6bcd9-4fa3-450d-b7a0-554a7ba45f1f |
| Verdict: | Malicious activity |
| Threats: | Chaos ransomware is a malware family known for its destructive capabilities and diverse variants. It first appeared in 2021 as a ransomware builder and later acted as a wiper. Unlike most ransomware strains that encrypt data to extort payment, early Chaos variants permanently corrupted files, while later versions adopted more conventional encryption techniques. |
| Analysis date: | July 29, 2024, 02:57:21 |
| OS: | Windows 10 Professional (build: 19045, 64 bit) |
| Tags: | |
| Indicators: | |
| MIME: | application/x-dosexec |
| File info: | PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows |
| MD5: | 0DC52E06B21DB8468D6692C77FBF8F03 |
| SHA1: | 0BA31EEBBCACB53FDE4DE77DC117628DE63FE254 |
| SHA256: | C12B5CDFE9CEAA7102571ED7479A540ACD0A31059AF547B366B78180F1B1C893 |
| SSDEEP: | 6144:dBherT1abK0eEI+DImbK0eoBxDLEPK0e5ucDGo:Oae0eEI+DIme0eoBxDLEy0e5ucDGo |
MALICIOUS
Drops the executable file immediately after the start
- Chaos Ransomware Builder v5.1.exe (PID: 7240)
CHAOS has been detected (YARA)
- Chaos Ransomware Builder v5.1.exe (PID: 7240)
SUSPICIOUS
Executable content was dropped or overwritten
- Chaos Ransomware Builder v5.1.exe (PID: 7240)
Reads security settings of Internet Explorer
- Chaos Ransomware Builder v5.1.exe (PID: 7240)
Found regular expressions for crypto-addresses (YARA)
- Chaos Ransomware Builder v5.1.exe (PID: 7240)
INFO
Reads the machine GUID from the registry
- Chaos Ransomware Builder v5.1.exe (PID: 7240)
Reads the computer name
- Chaos Ransomware Builder v5.1.exe (PID: 7240)
Checks supported languages
- Chaos Ransomware Builder v5.1.exe (PID: 7240)
Reads Microsoft Office registry keys
- OpenWith.exe (PID: 7616)
- OpenWith.exe (PID: 7952)
Reads security settings of Internet Explorer
- OpenWith.exe (PID: 7616)
- notepad.exe (PID: 7896)
- OpenWith.exe (PID: 7952)
- notepad.exe (PID: 8012)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
TRiD
| .exe | | | Generic CIL Executable (.NET, Mono, etc.) (63.1) |
|---|---|---|
| .exe | | | Win64 Executable (generic) (23.8) |
| .dll | | | Win32 Dynamic Link Library (generic) (5.6) |
| .exe | | | Win32 Executable (generic) (3.8) |
| .exe | | | Generic Win/DOS Executable (1.7) |
EXIF
EXE
| MachineType: | Intel 386 or later, and compatibles |
|---|---|
| TimeStamp: | 2022:03:03 13:25:47+00:00 |
| ImageFileCharacteristics: | Executable, Large address aware |
| PEType: | PE32 |
| LinkerVersion: | 48 |
| CodeSize: | 448512 |
| InitializedDataSize: | 123392 |
| UninitializedDataSize: | - |
| EntryPoint: | 0x6f662 |
| OSVersion: | 4 |
| ImageVersion: | - |
| SubsystemVersion: | 4 |
| Subsystem: | Windows GUI |
| FileVersionNumber: | 3.0.0.0 |
| ProductVersionNumber: | 3.0.0.0 |
| FileFlagsMask: | 0x003f |
| FileFlags: | (none) |
| FileOS: | Win32 |
| ObjectFileType: | Executable application |
| FileSubtype: | - |
| LanguageCode: | Neutral |
| CharacterSet: | Unicode |
| Comments: | - |
| CompanyName: | - |
| FileDescription: | Chaos Ransomware v5.1 |
| FileVersion: | 3.0.0.0 |
| InternalName: | Chaos Ransomware Builder v5.1.exe |
| LegalCopyright: | Copyright © 2021 |
| LegalTrademarks: | - |
| OriginalFileName: | Chaos Ransomware Builder v5.1.exe |
| ProductName: | Chaos Ransomware Builder v5.1 |
| ProductVersion: | 3.0.0.0 |
| AssemblyVersion: | 3.0.0.0 |
Total processes
140
Monitored processes
6
Malicious processes
1
Suspicious processes
0
Behavior graph
Click at the process to see the details
Process information
PID | CMD | Path | Indicators | Parent process | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 7188 | "C:\Users\admin\Desktop\Chaos Ransomware Builder v5.1.exe" | C:\Users\admin\Desktop\Chaos Ransomware Builder v5.1.exe | — | explorer.exe | |||||||||||
User: admin Integrity Level: MEDIUM Description: Chaos Ransomware v5.1 Exit code: 3221226540 Version: 3.0.0.0 Modules
| |||||||||||||||
| 7240 | "C:\Users\admin\Desktop\Chaos Ransomware Builder v5.1.exe" | C:\Users\admin\Desktop\Chaos Ransomware Builder v5.1.exe | explorer.exe | ||||||||||||
User: admin Integrity Level: HIGH Description: Chaos Ransomware v5.1 Version: 3.0.0.0 Modules
| |||||||||||||||
| 7616 | C:\WINDOWS\system32\OpenWith.exe -Embedding | C:\Windows\System32\OpenWith.exe | — | svchost.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Pick an app Exit code: 0 Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 7896 | "C:\WINDOWS\system32\NOTEPAD.EXE" C:\Users\admin\Desktop\1-decrypter\privateKey.chaos | C:\Windows\System32\notepad.exe | — | OpenWith.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Notepad Exit code: 0 Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 7952 | C:\WINDOWS\system32\OpenWith.exe -Embedding | C:\Windows\System32\OpenWith.exe | — | svchost.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Pick an app Exit code: 0 Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 8012 | "C:\WINDOWS\system32\NOTEPAD.EXE" C:\Users\admin\Desktop\1-decrypter\publicKey.chaos | C:\Windows\System32\notepad.exe | — | OpenWith.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Notepad Exit code: 0 Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
Total events
5 044
Read events
5 002
Write events
42
Delete events
0
Modification events
| (PID) Process: | (7240) Chaos Ransomware Builder v5.1.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap |
| Operation: | write | Name: | ProxyBypass |
Value: 1 | |||
| (PID) Process: | (7240) Chaos Ransomware Builder v5.1.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap |
| Operation: | write | Name: | IntranetName |
Value: 1 | |||
| (PID) Process: | (7240) Chaos Ransomware Builder v5.1.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap |
| Operation: | write | Name: | UNCAsIntranet |
Value: 1 | |||
| (PID) Process: | (7240) Chaos Ransomware Builder v5.1.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap |
| Operation: | write | Name: | AutoDetect |
Value: 0 | |||
| (PID) Process: | (7616) OpenWith.exe | Key: | HKEY_CLASSES_ROOT\Local Settings\MuiCache\3c\52C64B7E |
| Operation: | write | Name: | @C:\Program Files\Microsoft Office\root\VFS\ProgramFilesCommonX64\Microsoft Shared\Office16\oregres.dll,-205 |
Value: Word | |||
| (PID) Process: | (7616) OpenWith.exe | Key: | HKEY_CLASSES_ROOT\Local Settings\MuiCache\3c\52C64B7E |
| Operation: | write | Name: | @wmploc.dll,-102 |
Value: Windows Media Player | |||
| (PID) Process: | (7616) OpenWith.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap |
| Operation: | write | Name: | ProxyBypass |
Value: 1 | |||
| (PID) Process: | (7616) OpenWith.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap |
| Operation: | write | Name: | IntranetName |
Value: 1 | |||
| (PID) Process: | (7616) OpenWith.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap |
| Operation: | write | Name: | UNCAsIntranet |
Value: 1 | |||
| (PID) Process: | (7616) OpenWith.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap |
| Operation: | write | Name: | AutoDetect |
Value: 0 | |||
Executable files
1
Suspicious files
0
Text files
2
Unknown types
0
Dropped files
PID | Process | Filename | Type | |
|---|---|---|---|---|
| 7240 | Chaos Ransomware Builder v5.1.exe | C:\Users\admin\Desktop\1-decrypter\Decrypter.exe | executable | |
MD5:CD4F08AD0AE14BC3BA13E16E7B6CBB6E | SHA256:8F236217C4E280B4950CEDCCBC6BBD03F31902525A7F9FE98B6DE5BB50787CFB | |||
| 7240 | Chaos Ransomware Builder v5.1.exe | C:\Users\admin\Desktop\1-decrypter\publicKey.chaos | xml | |
MD5:3F6137A2633DCE644D730EBF1DACA3D2 | SHA256:2DC37305ED662AAC2062DA0CAC1C6F7141C5FDE8CC340A2385362615A98A744A | |||
| 7240 | Chaos Ransomware Builder v5.1.exe | C:\Users\admin\Desktop\1-decrypter\privateKey.chaos | xml | |
MD5:6D971BAE61505499862747677D156376 | SHA256:C733EC45D36ECB15E3E27672DED99D9117111E4F641DCF668A541F002FFB56C1 | |||
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
2
TCP/UDP connections
17
DNS requests
7
Threats
0
HTTP requests
PID | Process | Method | HTTP Code | IP | URL | CN | Type | Size | Reputation |
|---|---|---|---|---|---|---|---|---|---|
— | — | GET | 200 | 192.229.221.95:80 | http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTrjrydRyt%2BApF3GSPypfHBxR5XtQQUs9tIpPmhxdiuNkHMEWNpYim8S8YCEAI5PUjXAkJafLQcAAsO18o%3D | unknown | — | — | whitelisted |
4132 | OfficeClickToRun.exe | GET | 200 | 192.229.221.95:80 | http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBQ50otx%2Fh0Ztl%2Bz8SiPI7wEWVxDlQQUTiJUIBiV5uNu5g%2F6%2BrkS7QYXjzkCEAUZZSZEml49Gjh0j13P68w%3D | unknown | — | — | whitelisted |
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
Connections
PID | Process | IP | Domain | ASN | CN | Reputation |
|---|---|---|---|---|---|---|
4 | System | 192.168.100.255:138 | — | — | — | whitelisted |
— | — | 131.253.33.254:443 | a-ring-fallback.msedge.net | MICROSOFT-CORP-MSN-AS-BLOCK | US | unknown |
— | — | 40.127.240.158:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | IE | unknown |
— | — | 104.126.37.177:443 | www.bing.com | Akamai International B.V. | DE | unknown |
— | — | 40.91.76.224:443 | — | MICROSOFT-CORP-MSN-AS-BLOCK | US | whitelisted |
— | — | 192.229.221.95:80 | ocsp.digicert.com | EDGECAST | US | whitelisted |
3952 | svchost.exe | 239.255.255.250:1900 | — | — | — | whitelisted |
6564 | slui.exe | 40.91.76.224:443 | — | MICROSOFT-CORP-MSN-AS-BLOCK | US | whitelisted |
2300 | slui.exe | 40.91.76.224:443 | — | MICROSOFT-CORP-MSN-AS-BLOCK | US | whitelisted |
4 | System | 192.168.100.255:137 | — | — | — | whitelisted |
DNS requests
Domain | IP | Reputation |
|---|---|---|
t-ring-fdv2.msedge.net |
| unknown |
a-ring-fallback.msedge.net |
| unknown |
settings-win.data.microsoft.com |
| whitelisted |
www.bing.com |
| whitelisted |
ocsp.digicert.com |
| whitelisted |
google.com |
| whitelisted |
self.events.data.microsoft.com |
| whitelisted |