File name:

Sasser.B.exe

Full analysis: https://app.any.run/tasks/4b5406f7-828a-4a57-95b8-aa26a92f532b
Verdict: Malicious activity
Analysis date: April 25, 2025, 19:36:19
OS: Windows 7 Professional Service Pack 1 (build: 7601, 32 bit)
Tags:
scan
smbscan
smb
Indicators:
MIME: application/vnd.microsoft.portable-executable
File info: PE32 executable (GUI) Intel 80386, for MS Windows, 2 sections
MD5:

1A2C0E6130850F8FD9B9B5309413CD00

SHA1:

D0DE44BCF3CA6553307C77DA8699DBC9B5E9D56A

SHA256:

09398D3F5CC102F7D932B765036E1AC1FF5DC27405D7357B81EAF48CA8EC71B8

SSDEEP:

192:5LQQpqTnBW/OyBooSpbBdbnr9w/lhUYobpCtqOjVzg9ZsAXb1r5FSfhVWdzP5eOh:yQqTBNNrbSHhqONghZrGG5LWadp

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

    • Attempting to scan the network

      • Sasser.B.exe (PID: 2848)
      • Sasser.B.exe (PID: 3768)

    • Attempt to connect to SMB server

      • Sasser.B.exe (PID: 2848)
      • Sasser.B.exe (PID: 3768)

    • Changes the autorun value in the registry

      • Sasser.B.exe (PID: 2848)

    • SMBSCAN has been detected (SURICATA)

      • Sasser.B.exe (PID: 2848)
      • Sasser.B.exe (PID: 3768)

  • SUSPICIOUS

    • Application launched itself

      • Sasser.B.exe (PID: 2848)
      • WerFault.exe (PID: 2176)

    • Potential Corporate Privacy Violation

      • Sasser.B.exe (PID: 2848)
      • Sasser.B.exe (PID: 3768)

    • The process executes via Task Scheduler

      • ctfmon.exe (PID: 1960)
      • sipnotify.exe (PID: 404)

    • Reads the Internet Settings

      • runonce.exe (PID: 2152)
      • sipnotify.exe (PID: 404)

  • INFO

    • Failed to create an executable file in Windows directory

      • Sasser.B.exe (PID: 2848)

    • Checks supported languages

      • Sasser.B.exe (PID: 2848)
      • Sasser.B.exe (PID: 2844)
      • IMEKLMG.EXE (PID: 2260)
      • IMEKLMG.EXE (PID: 2272)

    • Reads the computer name

      • Sasser.B.exe (PID: 2848)
      • Sasser.B.exe (PID: 2844)
      • IMEKLMG.EXE (PID: 2260)
      • IMEKLMG.EXE (PID: 2272)

    • Reads the time zone

      • runonce.exe (PID: 2152)

    • Manual execution by a user

      • runonce.exe (PID: 2152)
      • IMEKLMG.EXE (PID: 2260)
      • IMEKLMG.EXE (PID: 2272)
      • explorer.exe (PID: 2740)
      • Sasser.B.exe (PID: 3768)

    • Reads security settings of Internet Explorer

      • runonce.exe (PID: 2152)

    • Create files in a temporary directory

      • WerFault.exe (PID: 2184)

    • Process checks whether UAC notifications are on

      • IMEKLMG.EXE (PID: 2260)
      • IMEKLMG.EXE (PID: 2272)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
No Malware configuration.

TRiD

.dll | Win32 Dynamic Link Library (generic) (43.5)
.exe | Win32 Executable (generic) (29.8)
.exe | Generic Win/DOS Executable (13.2)
.exe | DOS Executable Generic (13.2)

EXIF

EXE

MachineType: Intel 386 or later, and compatibles
TimeStamp: 2004:05:01 11:39:48+00:00
ImageFileCharacteristics: No relocs, Executable, No line numbers, No symbols, 32-bit
PEType: PE32
LinkerVersion: 6
CodeSize: 15872
InitializedDataSize: 8704
UninitializedDataSize: -
EntryPoint: 0x283e
OSVersion: 4
ImageVersion: -
SubsystemVersion: 4
Subsystem: Windows GUI
No data.
screenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshot
All screenshots are available in the full report
All screenshots are available in the full report
Total processes
91
Monitored processes
11
Malicious processes
2
Suspicious processes
0

Behavior graph

Click at the process to see the details
start #SMBSCAN sasser.b.exe sasser.b.exe no specs ctfmon.exe no specs sipnotify.exe runonce.exe werfault.exe no specs werfault.exe no specs imeklmg.exe no specs imeklmg.exe no specs explorer.exe no specs #SMBSCAN sasser.b.exe

Process information

PID
CMD
Path
Indicators
Parent process
404C:\Windows\system32\sipnotify.exe -LogonOrUnlockC:\Windows\System32\sipnotify.exe
taskeng.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
sipnotify
Exit code:
0
Version:
6.1.7602.20480 (win7sp1_ldr_escrow.191010-1716)
Modules
Images
c:\windows\system32\sipnotify.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\user32.dll
c:\windows\system32\gdi32.dll
1960C:\Windows\System32\ctfmon.exe C:\Windows\System32\ctfmon.exe—taskeng.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
CTF Loader
Version:
6.1.7600.16385 (win7_rtm.090713-1255)
Modules
Images
c:\windows\system32\ctfmon.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\msctfmonitor.dll
c:\windows\system32\msctf.dll
c:\windows\system32\user32.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\lpk.dll
2152runonce.exe /ExplorerC:\Windows\System32\runonce.exe
explorer.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
HIGH
Description:
Run Once Wrapper
Exit code:
0
Version:
6.1.7600.16385 (win7_rtm.090713-1255)
Modules
Images
c:\windows\system32\runonce.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\gdi32.dll
c:\windows\system32\user32.dll
2176"C:\Windows\System32\WerFault.exe" -k -rqC:\Windows\System32\WerFault.exe—runonce.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
HIGH
Description:
Windows Problem Reporting
Exit code:
0
Version:
6.1.7600.16385 (win7_rtm.090713-1255)
Modules
Images
c:\windows\system32\werfault.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\user32.dll
c:\windows\system32\gdi32.dll
2184C:\Windows\System32\WerFault.exe -k -qC:\Windows\System32\WerFault.exe—WerFault.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
HIGH
Description:
Windows Problem Reporting
Exit code:
0
Version:
6.1.7600.16385 (win7_rtm.090713-1255)
Modules
Images
c:\windows\system32\werfault.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\user32.dll
c:\windows\system32\gdi32.dll
2260"C:\Program Files\Common Files\microsoft shared\IME14\SHARED\IMEKLMG.EXE" /SetPreload /JPN /LogC:\Program Files\Common Files\microsoft shared\IME14\SHARED\IMEKLMG.EXE—explorer.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Microsoft Office IME 2010
Exit code:
1
Version:
14.0.4734.1000
Modules
Images
c:\program files\common files\microsoft shared\ime14\shared\imeklmg.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\user32.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\lpk.dll
c:\windows\system32\usp10.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\userenv.dll
2272"C:\Program Files\Common Files\microsoft shared\IME14\SHARED\IMEKLMG.EXE" /SetPreload /KOR /LogC:\Program Files\Common Files\microsoft shared\IME14\SHARED\IMEKLMG.EXE—explorer.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Microsoft Office IME 2010
Exit code:
1
Version:
14.0.4734.1000
Modules
Images
c:\program files\common files\microsoft shared\ime14\shared\imeklmg.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\user32.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\lpk.dll
c:\windows\system32\usp10.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\userenv.dll
2740"C:\Windows\explorer.exe" C:\Windows\explorer.exe—explorer.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Windows Explorer
Exit code:
1
Version:
6.1.7600.16385 (win7_rtm.090713-1255)
Modules
Images
c:\windows\explorer.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\gdi32.dll
c:\windows\system32\user32.dll
2844C:\Users\admin\Sasser.B.exe 127.124.239.122C:\Users\admin\Sasser.B.exe—Sasser.B.exe
User:
admin
Integrity Level:
MEDIUM
Exit code:
1
Modules
Images
c:\users\admin\sasser.b.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\user32.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\lpk.dll
c:\windows\system32\usp10.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\imm32.dll
2848"C:\Users\admin\Sasser.B.exe" C:\Users\admin\Sasser.B.exe
explorer.exe
User:
admin
Integrity Level:
MEDIUM
Exit code:
0
Modules
Images
c:\users\admin\sasser.b.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\user32.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\lpk.dll
c:\windows\system32\usp10.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\imm32.dll
Total events
4 118
Read events
4 097
Write events
14
Delete events
7

Modification events

(PID) Process:(2848) Sasser.B.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Operation:writeName:avserve2.exe
Value:
C:\Windows\avserve2.exe
(PID) Process:(2152) runonce.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce
Operation:delete valueName:*WerKernelReporting
Value:
%SYSTEMROOT%\SYSTEM32\WerFault.exe -k -rq
(PID) Process:(1960) ctfmon.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
Operation:delete valueName:internat.exe
Value:
(PID) Process:(2184) WerFault.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Windows Error Reporting\KernelFaults\Queue
Operation:delete valueName:C:\Windows\Minidump\042525-9406-01.dmp
Value:
�蓆똙Ǜ
(PID) Process:(2272) IMEKLMG.EXEKey:HKEY_CURRENT_USER\Software\Microsoft\IMEKR\14.0
Operation:writeName:SetPreload
Value:
1
(PID) Process:(2152) runonce.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
Operation:writeName:ProxyBypass
Value:
1
(PID) Process:(2152) runonce.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
Operation:writeName:IntranetName
Value:
1
(PID) Process:(2152) runonce.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
Operation:writeName:UNCAsIntranet
Value:
1
(PID) Process:(2152) runonce.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
Operation:writeName:AutoDetect
Value:
0
(PID) Process:(2184) WerFault.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Windows Error Reporting\KernelFaults\Queue
Operation:delete keyName:(default)
Value:
Executable files
0
Suspicious files
9
Text files
6
Unknown types
0

Dropped files

PID
Process
Filename
Type
2184WerFault.exeC:\ProgramData\Microsoft\Windows\WER\ReportArchive\Kernel_0_0_cab_08888e17\Report.wer —
MD5:—
SHA256:—
404sipnotify.exeC:\Users\admin\AppData\Local\Microsoft\Windows\SipNotify\default.cabcompressed
MD5:340674F6A3D1562E28A011EC11E40D83
SHA256:259880E2346D986ABEED46AA9C2917C53E969AAE6927F2CA0A2AD0967736DF98
404sipnotify.exeC:\Users\admin\AppData\Local\Microsoft\Windows\SipNotify\eoscontent\microsoft-logo.pngimage
MD5:B7C73A0CFBA68CC70C35EF9C63703CE4
SHA256:1D8B27A0266FF526CF95447F3701592A908848467D37C09A00A2516C1F29A013
2184WerFault.exeC:\Users\admin\AppData\Local\Temp\WER8D5C.tmp.cab.tmpbinary
MD5:FA2BB3AB19573AB5F774B842495EF5E2
SHA256:DC63FB007785D76398F7D031C72AC9637FA999994CB7B569394AC375396F2D2C
2184WerFault.exeC:\Users\admin\AppData\Local\Temp\WER8D5F.tmp.cab.tmpbinary
MD5:B276ABB4067C84C04EACB3901A35809A
SHA256:A4B64FA60F283738441EDF8C186E7E5E412136ECD4B70051283C8B225293B019
2184WerFault.exeC:\Users\admin\AppData\Local\Temp\WER-18046-0.sysdata.xmlxml
MD5:B7E38B5A83FC38998EEA25968B42554E
SHA256:5CB3B571D015C8DF84D1842C2D5E5F872829FBEF998EE36BC67C4A38342B95DF
2184WerFault.exeC:\Users\admin\AppData\Local\Temp\WER8D60.tmp.cab.tmpbinary
MD5:8BA028678E2B812B0A124ADC1BAB3ECE
SHA256:9C43C0DF390C39D64F1E5E8E9E032029A634F0B5CE12B24DE2D20A38BF8A0CEC
2184WerFault.exeC:\Users\admin\AppData\Local\Temp\WER8D5B.tmp.cabcompressed
MD5:B52E512F33DF3D8C66BA49A9FA377D02
SHA256:8930CC88F9B0E86FA34A0117713379A00EA51D74522C0CA800D28CE843C5C8CF
2184WerFault.exeC:\Users\admin\AppData\Local\Temp\WER8D5D.tmp.cab.tmpbinary
MD5:B276ABB4067C84C04EACB3901A35809A
SHA256:A4B64FA60F283738441EDF8C186E7E5E412136ECD4B70051283C8B225293B019
404sipnotify.exeC:\Users\admin\AppData\Local\Microsoft\Windows\SipNotify\eoscontent\en-us.htmlhtml
MD5:5001C5247AF7E35AC35ACE61B87E8040
SHA256:2920ED0DDFE475884703A5AE7B835F40398E509AA26B52A8DDD7F25DCD4B3D2E
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
1
TCP/UDP connections
673
DNS requests
5
Threats
8

HTTP requests

PID
Process
Method
HTTP Code
IP
URL
CN
Type
Size
Reputation
404
sipnotify.exe
HEAD
503
23.207.104.5:80
http://query.prod.cms.rt.microsoft.com/cms/api/am/binary/RE2JgkA?v=133900870716250000
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
192.168.100.255:137
—
—
—
whitelisted
—
—
224.0.0.252:5355
—
—
—
whitelisted
2848
Sasser.B.exe
57.220.243.203:445
—
—
IE
unknown
1080
svchost.exe
224.0.0.252:5355
—
—
—
whitelisted
2848
Sasser.B.exe
91.149.113.2:445
—
T2 Mobile LLC
RU
unknown
2848
Sasser.B.exe
35.203.98.90:445
—
GOOGLE-CLOUD-PLATFORM
CA
unknown
2848
Sasser.B.exe
192.168.220.135:445
—
—
—
unknown
2848
Sasser.B.exe
192.236.129.214:445
—
HOSTWINDS
US
unknown
2848
Sasser.B.exe
192.168.114.170:445
—
—
—
unknown
2848
Sasser.B.exe
169.161.212.50:445
—
—
US
unknown

DNS requests

Domain
IP
Reputation
google.com
  • 142.250.186.174
whitelisted
dns.msftncsi.com
  • 131.107.255.255
whitelisted
query.prod.cms.rt.microsoft.com
  • 23.207.104.5
whitelisted

Threats

PID
Process
Class
Message
2848
Sasser.B.exe
Potential Corporate Privacy Violation
POLICY [ANY.RUN] Attempting to scan SMB servers inside a home network
2848
Sasser.B.exe
Potential Corporate Privacy Violation
POLICY [ANY.RUN] Attempting to scan SMB servers outside a home network
2848
Sasser.B.exe
Potential Corporate Privacy Violation
POLICY [ANY.RUN] Attempting to scan SMB servers outside a home network
3768
Sasser.B.exe
Potential Corporate Privacy Violation
POLICY [ANY.RUN] Attempting to scan SMB servers inside a home network
3768
Sasser.B.exe
Potential Corporate Privacy Violation
POLICY [ANY.RUN] Attempting to scan SMB servers outside a home network
3768
Sasser.B.exe
Potential Corporate Privacy Violation
POLICY [ANY.RUN] Attempting to scan SMB servers outside a home network
3768
Sasser.B.exe
Potential Corporate Privacy Violation
POLICY [ANY.RUN] Attempting to scan SMB servers inside a home network
3768
Sasser.B.exe
Potential Corporate Privacy Violation
POLICY [ANY.RUN] Attempting to scan SMB servers outside a home network
No debug info
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Reports
Sasser.B.exe