File name:

INSTRUCTIONLETTER63-2025.exe

Full analysis: https://app.any.run/tasks/57c6d291-2f01-40b7-b628-a8aa5743c4d7
Verdict: Malicious activity
Threats:

Agent Tesla is spyware that collects information about the actions of its victims by recording keystrokes and user interactions. It is falsely marketed as a legitimate software on the dedicated website where this malware is sold.

Analysis date: March 25, 2025, 03:40:58
OS: Windows 10 Professional (build: 19044, 64 bit)
Tags:
evasion
stealer
ultravnc
rmm-tool
purecrypter
netreactor
agenttesla
Indicators:
MIME: application/vnd.microsoft.portable-executable
File info: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows, 3 sections
MD5:

1CE4EEC150B3F140F72CE0DDCAD39337

SHA1:

E5FB09B22C4C04025281DA6661D7C895D7D496A9

SHA256:

2A64D3212309DA646F5EF8210F6B8966C7A63CE82CB5BBD3C03838DD296BADCF

SSDEEP:

49152:95akkiigYtI295TAChHWvd8GXW8Q7c1qWrW43ggZmzlrRemteQvkuyWhc6d1S0Dt:95h5iNfTnhHGyL8Q7ZWrWeg4mz73tRk2

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

    • PURECRYPTER has been detected (YARA)

      • INSTRUCTIONLETTER63-2025.exe (PID: 7564)
    • Create files in the Startup directory

      • INSTRUCTIONLETTER63-2025.exe (PID: 7564)
    • Actions looks like stealing of personal data

      • InstallUtil.exe (PID: 7800)
      • InstallUtil.exe (PID: 5072)
    • AGENTTESLA has been detected (YARA)

      • InstallUtil.exe (PID: 7800)
      • InstallUtil.exe (PID: 5072)
    • Steals credentials from Web Browsers

      • InstallUtil.exe (PID: 7800)
      • InstallUtil.exe (PID: 5072)
  • SUSPICIOUS

    • Executable content was dropped or overwritten

      • INSTRUCTIONLETTER63-2025.exe (PID: 7564)
    • Potential Corporate Privacy Violation

      • InstallUtil.exe (PID: 7800)
      • InstallUtil.exe (PID: 5072)
    • Checks for external IP

      • InstallUtil.exe (PID: 7800)
      • InstallUtil.exe (PID: 5072)
    • Connects to SMTP port

      • InstallUtil.exe (PID: 7800)
      • InstallUtil.exe (PID: 5072)
    • Runs shell command (SCRIPT)

      • wscript.exe (PID: 7928)
  • INFO

    • Checks supported languages

      • INSTRUCTIONLETTER63-2025.exe (PID: 7564)
      • InstallUtil.exe (PID: 7800)
      • Keywords.exe (PID: 7980)
      • InstallUtil.exe (PID: 5072)
    • Reads the computer name

      • INSTRUCTIONLETTER63-2025.exe (PID: 7564)
      • InstallUtil.exe (PID: 7800)
      • Keywords.exe (PID: 7980)
      • InstallUtil.exe (PID: 5072)
    • Reads the machine GUID from the registry

      • INSTRUCTIONLETTER63-2025.exe (PID: 7564)
      • Keywords.exe (PID: 7980)
      • InstallUtil.exe (PID: 7800)
      • InstallUtil.exe (PID: 5072)
    • Creates files or folders in the user directory

      • INSTRUCTIONLETTER63-2025.exe (PID: 7564)
    • Manual execution by a user

      • InstallUtil.exe (PID: 7800)
      • wscript.exe (PID: 7928)
      • InstallUtil.exe (PID: 5072)
    • Autorun file from Startup directory

      • INSTRUCTIONLETTER63-2025.exe (PID: 7564)
    • .NET Reactor protector has been detected

      • INSTRUCTIONLETTER63-2025.exe (PID: 7564)
    • Reads the software policy settings

      • InstallUtil.exe (PID: 7800)
      • InstallUtil.exe (PID: 5072)
      • slui.exe (PID: 5968)
    • ULTRAVNC has been detected

      • InstallUtil.exe (PID: 7800)
      • InstallUtil.exe (PID: 5072)
    • Disables trace logs

      • InstallUtil.exe (PID: 7800)
      • InstallUtil.exe (PID: 5072)
    • Checks proxy server information

      • InstallUtil.exe (PID: 7800)
      • InstallUtil.exe (PID: 5072)
      • slui.exe (PID: 5968)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report

AgentTesla

(PID) Process(7800) InstallUtil.exe
Protocolsmtp
Hostmail.iaa-airferight.com
Port25
Usernameclassic@iaa-airferight.com
PasswordBIGNAIRA2024
(PID) Process(5072) InstallUtil.exe
Protocolsmtp
Hostmail.iaa-airferight.com
Port25
Usernameclassic@iaa-airferight.com
PasswordBIGNAIRA2024
No Malware configuration.

TRiD

.exe | Generic CIL Executable (.NET, Mono, etc.) (56.7)
.exe | Win64 Executable (generic) (21.3)
.scr | Windows screen saver (10.1)
.dll | Win32 Dynamic Link Library (generic) (5)
.exe | Win32 Executable (generic) (3.4)

EXIF

EXE

MachineType: Intel 386 or later, and compatibles
TimeStamp: 2025:03:24 21:50:21+00:00
ImageFileCharacteristics: Executable, No line numbers, No symbols, 32-bit
PEType: PE32
LinkerVersion: 8
CodeSize: 1315840
InitializedDataSize: 2048
UninitializedDataSize: -
EntryPoint: 0x14329e
OSVersion: 4
ImageVersion: -
SubsystemVersion: 4
Subsystem: Windows GUI
FileVersionNumber: 1.0.0.0
ProductVersionNumber: 1.0.0.0
FileFlagsMask: 0x003f
FileFlags: (none)
FileOS: Win32
ObjectFileType: Executable application
FileSubtype: -
LanguageCode: Neutral
CharacterSet: Unicode
Comments: -
CompanyName: -
FileDescription: Dlnfcrr
FileVersion: 1.0.0.0
InternalName: Dlnfcrr.exe
LegalCopyright: Copyright © 2016
LegalTrademarks: -
OriginalFileName: Dlnfcrr.exe
ProductName: Dlnfcrr
ProductVersion: 1.0.0.0
AssemblyVersion: 1.0.0.0
No data.
screenshot
All screenshots are available in the full report
All screenshots are available in the full report
Total processes
129
Monitored processes
6
Malicious processes
3
Suspicious processes
1

Behavior graph

Click at the process to see the details
start #PURECRYPTER instructionletter63-2025.exe #AGENTTESLA installutil.exe wscript.exe no specs keywords.exe no specs #AGENTTESLA installutil.exe slui.exe

Process information

PID
CMD
Path
Indicators
Parent process
5072"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
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\advapi32.dll
AgentTesla
(PID) Process(5072) InstallUtil.exe
Protocolsmtp
Hostmail.iaa-airferight.com
Port25
Usernameclassic@iaa-airferight.com
PasswordBIGNAIRA2024
5968C:\WINDOWS\System32\slui.exe -EmbeddingC:\Windows\System32\slui.exe
svchost.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Windows Activation Client
Exit code:
0
Version:
10.0.19041.1 (WinBuild.160101.0800)
Modules
Images
c:\windows\system32\slui.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\advapi32.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\sechost.dll
c:\windows\system32\rpcrt4.dll
c:\windows\system32\bcrypt.dll
c:\windows\system32\user32.dll
7564"C:\Users\admin\Desktop\INSTRUCTIONLETTER63-2025.exe" C:\Users\admin\Desktop\INSTRUCTIONLETTER63-2025.exe
explorer.exe
User:
admin
Integrity Level:
MEDIUM
Description:
Dlnfcrr
Exit code:
4294967295
Version:
1.0.0.0
Modules
Images
c:\users\admin\desktop\instructionletter63-2025.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
7800"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:
4294967295
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
AgentTesla
(PID) Process(7800) InstallUtil.exe
Protocolsmtp
Hostmail.iaa-airferight.com
Port25
Usernameclassic@iaa-airferight.com
PasswordBIGNAIRA2024
7928"C:\WINDOWS\System32\WScript.exe" "C:\Users\admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Keywords.vbs"C:\Windows\System32\wscript.exeexplorer.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Microsoft ® Windows Based Script Host
Exit code:
0
Version:
5.812.10240.16384
Modules
Images
c:\windows\system32\wscript.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\oleaut32.dll
c:\windows\system32\msvcp_win.dll
c:\windows\system32\ucrtbase.dll
c:\windows\system32\combase.dll
c:\windows\system32\rpcrt4.dll
7980"C:\Users\admin\AppData\Roaming\Keywords.exe" C:\Users\admin\AppData\Roaming\Keywords.exewscript.exe
User:
admin
Integrity Level:
MEDIUM
Description:
Dlnfcrr
Exit code:
4294967295
Version:
1.0.0.0
Modules
Images
c:\users\admin\appdata\roaming\keywords.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
11 696
Read events
11 682
Write events
14
Delete events
0

Modification events

(PID) Process:(7800) InstallUtil.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Tracing\InstallUtil_RASAPI32
Operation:writeName:EnableFileTracing
Value:
0
(PID) Process:(7800) InstallUtil.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Tracing\InstallUtil_RASAPI32
Operation:writeName:EnableAutoFileTracing
Value:
0
(PID) Process:(7800) InstallUtil.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Tracing\InstallUtil_RASAPI32
Operation:writeName:EnableConsoleTracing
Value:
0
(PID) Process:(7800) InstallUtil.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Tracing\InstallUtil_RASAPI32
Operation:writeName:FileTracingMask
Value:
(PID) Process:(7800) InstallUtil.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Tracing\InstallUtil_RASAPI32
Operation:writeName:ConsoleTracingMask
Value:
(PID) Process:(7800) InstallUtil.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Tracing\InstallUtil_RASAPI32
Operation:writeName:MaxFileSize
Value:
1048576
(PID) Process:(7800) InstallUtil.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Tracing\InstallUtil_RASAPI32
Operation:writeName:FileDirectory
Value:
%windir%\tracing
(PID) Process:(7800) InstallUtil.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Tracing\InstallUtil_RASMANCS
Operation:writeName:EnableFileTracing
Value:
0
(PID) Process:(7800) InstallUtil.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Tracing\InstallUtil_RASMANCS
Operation:writeName:EnableAutoFileTracing
Value:
0
(PID) Process:(7800) InstallUtil.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Tracing\InstallUtil_RASMANCS
Operation:writeName:EnableConsoleTracing
Value:
0
Executable files
1
Suspicious files
0
Text files
1
Unknown types
0

Dropped files

PID
Process
Filename
Type
7564INSTRUCTIONLETTER63-2025.exeC:\Users\admin\AppData\Roaming\Keywords.exeexecutable
MD5:1CE4EEC150B3F140F72CE0DDCAD39337
SHA256:2A64D3212309DA646F5EF8210F6B8966C7A63CE82CB5BBD3C03838DD296BADCF
7564INSTRUCTIONLETTER63-2025.exeC:\Users\admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Keywords.vbstext
MD5:D360A32975E1150FEC5DB07597A19052
SHA256:3BA68535BE0D4B591491DC7FC2D5F0040C5137946568AA33DE49F1772A215851
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
5
TCP/UDP connections
28
DNS requests
7
Threats
10

HTTP requests

PID
Process
Method
HTTP Code
IP
URL
CN
Type
Size
Reputation
2104
svchost.exe
GET
200
23.216.77.28:80
http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl
unknown
whitelisted
GET
200
104.26.13.205:443
https://api.ipify.org/
unknown
text
14 b
malicious
GET
200
172.67.74.152:443
https://api.ipify.org/
unknown
text
14 b
malicious
POST
500
40.91.76.224:443
https://activation-v2.sls.microsoft.com/SLActivateProduct/SLActivateProduct.asmx?configextension=Retail
unknown
xml
512 b
whitelisted
POST
500
40.91.76.224:443
https://activation-v2.sls.microsoft.com/SLActivateProduct/SLActivateProduct.asmx?configextension=Retail
unknown
xml
512 b
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
192.168.100.255:137
whitelisted
4.231.128.59:443
MICROSOFT-CORP-MSN-AS-BLOCK
IE
whitelisted
2104
svchost.exe
4.231.128.59:443
MICROSOFT-CORP-MSN-AS-BLOCK
IE
whitelisted
4
System
192.168.100.255:138
whitelisted
2104
svchost.exe
23.216.77.28:80
crl.microsoft.com
Akamai International B.V.
DE
whitelisted
2104
svchost.exe
51.104.136.2:443
settings-win.data.microsoft.com
MICROSOFT-CORP-MSN-AS-BLOCK
IE
whitelisted
7800
InstallUtil.exe
104.26.12.205:443
api.ipify.org
CLOUDFLARENET
US
shared
7800
InstallUtil.exe
46.175.148.58:25
mail.iaa-airferight.com
Serverius Holding B.V.
NL
malicious
5072
InstallUtil.exe
104.26.12.205:443
api.ipify.org
CLOUDFLARENET
US
shared
5072
InstallUtil.exe
46.175.148.58:25
mail.iaa-airferight.com
Serverius Holding B.V.
NL
malicious

DNS requests

Domain
IP
Reputation
google.com
  • 142.250.181.238
whitelisted
crl.microsoft.com
  • 23.216.77.28
  • 23.216.77.6
whitelisted
settings-win.data.microsoft.com
  • 51.104.136.2
whitelisted
api.ipify.org
  • 104.26.12.205
  • 104.26.13.205
  • 172.67.74.152
shared
mail.iaa-airferight.com
  • 46.175.148.58
malicious
activation-v2.sls.microsoft.com
  • 20.83.72.98
whitelisted

Threats

PID
Process
Class
Message
7800
InstallUtil.exe
Potential Corporate Privacy Violation
ET INFO Possible IP Check api.ipify.org
7800
InstallUtil.exe
Misc activity
ET INFO External IP Address Lookup Domain (ipify .org) in TLS SNI
2196
svchost.exe
Misc activity
ET INFO External IP Lookup Domain (ipify .org) in DNS Lookup
Device Retrieving External IP Address Detected
ET INFO External IP Lookup api.ipify.org
Device Retrieving External IP Address Detected
POLICY [ANY.RUN] External IP Lookup by HTTP (api .ipify .org)
Device Retrieving External IP Address Detected
SUSPICIOUS [ANY.RUN] An IP address was received from the server as a result of an HTTP request
5072
InstallUtil.exe
Potential Corporate Privacy Violation
ET INFO Possible IP Check api.ipify.org
5072
InstallUtil.exe
Misc activity
ET INFO External IP Address Lookup Domain (ipify .org) in TLS SNI
Device Retrieving External IP Address Detected
POLICY [ANY.RUN] External IP Lookup by HTTP (api .ipify .org)
Device Retrieving External IP Address Detected
ET INFO External IP Lookup api.ipify.org
No debug info