File name:

2acfce51d24f1407a373546e2e0e76e56c73599e504bb714761de0032a3ce990

Full analysis: https://app.any.run/tasks/70ca54e9-5f33-4cea-88ad-77c446b915a5
Verdict: Malicious activity
Threats:

First identified in March 2021, PureCrypter is a .NET-based loader that employs obfuscation techniques, such as SmartAssembly, to evade detection. It has been used to distribute malware families including AgentTesla, RedLine Stealer, and SnakeKeylogger. The malware is typically delivered through phishing campaigns and malicious downloads, often masquerading as legitimate files with extensions like .mp4 or .pdf. PureCrypter utilizes encryption and compression to conceal its payloads and can inject malicious code into legitimate processes to maintain persistence on the infected system.

Analysis date: January 10, 2025, 22:15:43
OS: Windows 10 Professional (build: 19045, 64 bit)
Tags:
purecrypter
purelogs
stealer
Indicators:
MIME: application/vnd.microsoft.portable-executable
File info: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows, 3 sections
MD5:

3731B50AEC928007AE020003C83EC4E5

SHA1:

CA52A10CB044DB5848774F8EF02930D86928A13E

SHA256:

2ACFCE51D24F1407A373546E2E0E76E56C73599E504BB714761DE0032A3CE990

SSDEEP:

49152:lfZFk2fjNf0EcHvjB5Rw8MHUZtZz00TQnkKIK9qqBcZ4nX9I0HvsFzE8E+H5ylyU:nFkCFcPj/vEUZtO0Sd9L0UrsFzE8NlPU

ANY.RUN is an interactive service which provides full access to the guest system. Information in this report could be distorted by user actions and is provided for user acknowledgement as it is. ANY.RUN does not guarantee maliciousness or safety of the content.
  • MALICIOUS

    • Create files in the Startup directory

      • 2acfce51d24f1407a373546e2e0e76e56c73599e504bb714761de0032a3ce990.exe (PID: 1200)
    • PURECRYPTER has been detected (SURICATA)

      • InstallUtil.exe (PID: 6476)
    • Connects to the CnC server

      • InstallUtil.exe (PID: 6476)
    • Scans artifacts that could help determine the target

      • InstallUtil.exe (PID: 6476)
    • Actions looks like stealing of personal data

      • InstallUtil.exe (PID: 6476)
    • Steals credentials from Web Browsers

      • InstallUtil.exe (PID: 6476)
  • SUSPICIOUS

    • Executable content was dropped or overwritten

      • 2acfce51d24f1407a373546e2e0e76e56c73599e504bb714761de0032a3ce990.exe (PID: 1200)
    • Contacting a server suspected of hosting an CnC

      • InstallUtil.exe (PID: 6476)
    • Connects to unusual port

      • InstallUtil.exe (PID: 6476)
  • INFO

    • Creates files or folders in the user directory

      • 2acfce51d24f1407a373546e2e0e76e56c73599e504bb714761de0032a3ce990.exe (PID: 1200)
    • Checks supported languages

      • 2acfce51d24f1407a373546e2e0e76e56c73599e504bb714761de0032a3ce990.exe (PID: 1200)
      • InstallUtil.exe (PID: 6476)
    • Reads the machine GUID from the registry

      • 2acfce51d24f1407a373546e2e0e76e56c73599e504bb714761de0032a3ce990.exe (PID: 1200)
      • InstallUtil.exe (PID: 6476)
    • Reads the computer name

      • 2acfce51d24f1407a373546e2e0e76e56c73599e504bb714761de0032a3ce990.exe (PID: 1200)
      • InstallUtil.exe (PID: 6476)
    • Manual execution by a user

      • InstallUtil.exe (PID: 6476)
    • Reads Microsoft Office registry keys

      • InstallUtil.exe (PID: 6476)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
No Malware configuration.

TRiD

.exe | Generic CIL Executable (.NET, Mono, etc.) (62)
.exe | Win64 Executable (generic) (23.3)
.dll | Win32 Dynamic Link Library (generic) (5.5)
.exe | Win32 Executable (generic) (3.8)
.exe | Win16/32 Executable Delphi generic (1.7)

EXIF

EXE

AssemblyVersion: 1.0.0.0
ProductVersion: 1.0.0.0
ProductName: Umyhpjsztb
OriginalFileName: Umyhpjsztb.exe
LegalTrademarks: -
LegalCopyright: Copyright © 2010
InternalName: Umyhpjsztb.exe
FileVersion: 1.0.0.0
FileDescription: Umyhpjsztb
CompanyName: -
Comments: -
CharacterSet: Unicode
LanguageCode: Neutral
FileSubtype: -
ObjectFileType: Executable application
FileOS: Win32
FileFlags: (none)
FileFlagsMask: 0x003f
ProductVersionNumber: 1.0.0.0
FileVersionNumber: 1.0.0.0
Subsystem: Windows GUI
SubsystemVersion: 4
ImageVersion: -
OSVersion: 4
EntryPoint: 0x1774ee
UninitializedDataSize: -
InitializedDataSize: 2048
CodeSize: 1529344
LinkerVersion: 8
PEType: PE32
ImageFileCharacteristics: Executable, 32-bit
TimeStamp: 2024:12:12 08:08:25+00:00
MachineType: Intel 386 or later, and compatibles
No data.
screenshot
All screenshots are available in the full report
All screenshots are available in the full report
Total processes
131
Monitored processes
2
Malicious processes
1
Suspicious processes
1

Behavior graph

Click at the process to see the details
start 2acfce51d24f1407a373546e2e0e76e56c73599e504bb714761de0032a3ce990.exe #PURECRYPTER installutil.exe

Process information

PID
CMD
Path
Indicators
Parent process
1200"C:\Users\admin\AppData\Local\Temp\2acfce51d24f1407a373546e2e0e76e56c73599e504bb714761de0032a3ce990.exe" C:\Users\admin\AppData\Local\Temp\2acfce51d24f1407a373546e2e0e76e56c73599e504bb714761de0032a3ce990.exe
explorer.exe
User:
admin
Integrity Level:
MEDIUM
Description:
Umyhpjsztb
Exit code:
4294967295
Version:
1.0.0.0
Modules
Images
c:\users\admin\appdata\local\temp\2acfce51d24f1407a373546e2e0e76e56c73599e504bb714761de0032a3ce990.exe
c:\windows\system32\ntdll.dll
c:\windows\syswow64\ntdll.dll
c:\windows\system32\wow64.dll
c:\windows\system32\wow64win.dll
c:\windows\system32\wow64cpu.dll
c:\windows\syswow64\mscoree.dll
c:\windows\syswow64\kernel32.dll
c:\windows\syswow64\kernelbase.dll
c:\windows\syswow64\apphelp.dll
6476"C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
explorer.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
.NET Framework installation utility
Exit code:
0
Version:
4.8.9037.0 built by: NET481REL1
Modules
Images
c:\windows\microsoft.net\framework\v4.0.30319\installutil.exe
c:\windows\system32\ntdll.dll
c:\windows\syswow64\ntdll.dll
c:\windows\system32\wow64.dll
c:\windows\system32\wow64win.dll
c:\windows\system32\wow64cpu.dll
c:\windows\syswow64\mscoree.dll
c:\windows\syswow64\kernel32.dll
c:\windows\syswow64\kernelbase.dll
c:\windows\syswow64\apphelp.dll
Total events
1 959
Read events
1 959
Write events
0
Delete events
0

Modification events

No data
Executable files
1
Suspicious files
0
Text files
1
Unknown types
0

Dropped files

PID
Process
Filename
Type
12002acfce51d24f1407a373546e2e0e76e56c73599e504bb714761de0032a3ce990.exeC:\Users\admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\saas.vbstext
MD5:FBA0E7C6F898BE40969614EF8D2FAD5F
SHA256:E2718B990951715F11E4C67E85FBCC5B7853FA43E3E5B7389DA71B3C627012D0
12002acfce51d24f1407a373546e2e0e76e56c73599e504bb714761de0032a3ce990.exeC:\Users\admin\AppData\Roaming\saas.exeexecutable
MD5:3731B50AEC928007AE020003C83EC4E5
SHA256:2ACFCE51D24F1407A373546E2E0E76E56C73599E504BB714761DE0032A3CE990
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
6
TCP/UDP connections
32
DNS requests
17
Threats
2

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
1176
svchost.exe
GET
200
192.229.221.95:80
http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBSAUQYBMq2awn1Rh6Doh%2FsBYgFV7gQUA95QNVbRTLtm8KPiGxvDl7I90VUCEAJ0LqoXyo4hxxe7H%2Fz9DKA%3D
unknown
whitelisted
4712
MoUsoCoreWorker.exe
GET
200
23.48.23.166:80
http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl
unknown
whitelisted
6996
SIHClient.exe
GET
200
23.52.120.96:80
http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Product%20Root%20Certificate%20Authority%202018.crl
unknown
whitelisted
4712
MoUsoCoreWorker.exe
GET
200
23.52.120.96:80
http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl
unknown
whitelisted
6996
SIHClient.exe
GET
200
23.52.120.96:80
http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Update%20Secure%20Server%20CA%202.1.crl
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
1684
svchost.exe
40.127.240.158:443
settings-win.data.microsoft.com
MICROSOFT-CORP-MSN-AS-BLOCK
IE
whitelisted
4
System
192.168.100.255:137
unknown
40.127.240.158:443
settings-win.data.microsoft.com
MICROSOFT-CORP-MSN-AS-BLOCK
IE
whitelisted
4712
MoUsoCoreWorker.exe
23.48.23.166:80
crl.microsoft.com
Akamai International B.V.
DE
unknown
4712
MoUsoCoreWorker.exe
23.52.120.96:80
www.microsoft.com
AKAMAI-AS
DE
whitelisted
5064
SearchApp.exe
2.16.110.121:443
www.bing.com
Akamai International B.V.
DE
unknown
4
System
192.168.100.255:138
unknown
192.229.221.95:80
ocsp.digicert.com
EDGECAST
US
unknown
1176
svchost.exe
20.190.159.0:443
login.live.com
MICROSOFT-CORP-MSN-AS-BLOCK
IE
unknown
1176
svchost.exe
192.229.221.95:80
ocsp.digicert.com
EDGECAST
US
unknown

DNS requests

Domain
IP
Reputation
settings-win.data.microsoft.com
  • 40.127.240.158
  • 51.104.136.2
  • 51.124.78.146
unknown
crl.microsoft.com
  • 23.48.23.166
  • 23.48.23.177
  • 23.48.23.164
  • 23.48.23.173
unknown
www.microsoft.com
  • 23.52.120.96
unknown
google.com
  • 142.250.185.110
unknown
www.bing.com
  • 2.16.110.121
unknown
ocsp.digicert.com
  • 192.229.221.95
unknown
login.live.com
  • 20.190.159.0
  • 20.190.159.75
  • 20.190.159.71
  • 20.190.159.73
  • 40.126.31.67
  • 20.190.159.23
  • 40.126.31.71
  • 20.190.159.2
unknown
go.microsoft.com
  • 23.213.166.81
unknown
slscr.update.microsoft.com
  • 4.175.87.197
unknown
fe3cr.delivery.mp.microsoft.com
  • 13.95.31.18
unknown

Threats

PID
Process
Class
Message
A Network Trojan was detected
LOADER [ANY.RUN] PureLogs Download Attempt (LOAD)
1 ETPRO signatures available at the full report
No debug info