File name:

rundll32.exe

Full analysis: https://app.any.run/tasks/be41b729-5ef4-4d3d-a3c7-d2e6f87e8836
Verdict: Malicious activity
Threats:

A backdoor is a type of cybersecurity threat that allows attackers to secretly compromise a system and conduct malicious activities, such as stealing data and modifying files. Backdoors can be difficult to detect, as they often use legitimate system applications to evade defense mechanisms. Threat actors often utilize special malware, such as PlugX, to establish backdoors on target devices.

Analysis date: February 20, 2022, 06:46:32
OS: Windows 7 Professional Service Pack 1 (build: 7601, 32 bit)
Tags:
trojan
rat
backdoor
dcrat
Indicators:
MIME: application/x-dosexec
File info: PE32 executable (GUI) Intel 80386, for MS Windows
MD5:

76A783EC0755576F84261B85E2F8D872

SHA1:

08B19511BDBCE27DF2104B073E0486CF890BDFE3

SHA256:

0EDEDCC326D5A74401A54C3712C93D525187DD2DFD06E4B0286AA9D749017787

SSDEEP:

24576:IL7py28cIe/guyiSERS+hIk+33oegt3I9vTrdfb4oJKOX:Ivpy28cH/guj7R/OkZekKv54aH

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

    • Changes the autorun value in the registry

      • rundll32.exe (PID: 1012)
    • Drops executable file immediately after starts

      • rundll32.exe (PID: 1012)
    • Loads the Task Scheduler COM API

      • schtasks.exe (PID: 3692)
      • schtasks.exe (PID: 3744)
      • schtasks.exe (PID: 2668)
      • schtasks.exe (PID: 2836)
      • schtasks.exe (PID: 2008)
      • schtasks.exe (PID: 3056)
      • schtasks.exe (PID: 2116)
      • schtasks.exe (PID: 3448)
      • schtasks.exe (PID: 388)
    • Uses Task Scheduler to run other applications

      • cmd.exe (PID: 3444)
    • DCRAT was detected

      • lsass.exe (PID: 1956)
  • SUSPICIOUS

    • Reads Environment values

      • rundll32.exe (PID: 1012)
      • lsass.exe (PID: 1956)
      • lsass.exe (PID: 1860)
      • wininit.exe (PID: 4056)
      • lsass.exe (PID: 2876)
      • csrss.exe (PID: 520)
    • Reads the computer name

      • rundll32.exe (PID: 1012)
      • lsass.exe (PID: 1956)
      • wininit.exe (PID: 4056)
      • csrss.exe (PID: 520)
      • lsass.exe (PID: 1860)
      • lsass.exe (PID: 2876)
    • Checks supported languages

      • rundll32.exe (PID: 1012)
      • lsass.exe (PID: 1956)
      • cmd.exe (PID: 3444)
      • lsass.exe (PID: 1860)
      • csrss.exe (PID: 520)
      • wininit.exe (PID: 4056)
      • lsass.exe (PID: 2876)
    • Executed via WMI

      • schtasks.exe (PID: 3692)
      • schtasks.exe (PID: 3744)
      • schtasks.exe (PID: 2668)
      • schtasks.exe (PID: 2836)
    • Executable content was dropped or overwritten

      • rundll32.exe (PID: 1012)
    • Executed via Task Scheduler

      • lsass.exe (PID: 1860)
      • csrss.exe (PID: 520)
      • wininit.exe (PID: 4056)
      • lsass.exe (PID: 2876)
    • Starts itself from another location

      • rundll32.exe (PID: 1012)
  • INFO

    • Checks supported languages

      • schtasks.exe (PID: 3692)
      • schtasks.exe (PID: 3744)
      • schtasks.exe (PID: 2668)
      • schtasks.exe (PID: 2008)
      • schtasks.exe (PID: 2836)
      • schtasks.exe (PID: 3056)
      • schtasks.exe (PID: 3448)
      • schtasks.exe (PID: 2116)
      • schtasks.exe (PID: 388)
    • Reads the computer name

      • schtasks.exe (PID: 3692)
      • schtasks.exe (PID: 3744)
      • schtasks.exe (PID: 2836)
      • schtasks.exe (PID: 2008)
      • schtasks.exe (PID: 2668)
      • schtasks.exe (PID: 3056)
      • schtasks.exe (PID: 3448)
      • schtasks.exe (PID: 2116)
      • schtasks.exe (PID: 388)
    • Manual execution by user

      • cmd.exe (PID: 3444)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
No Malware configuration.

TRiD

.exe | Win64 Executable (generic) (61.6)
.dll | Win32 Dynamic Link Library (generic) (14.6)
.exe | Win32 Executable (generic) (10)
.exe | Win16/32 Executable Delphi generic (4.6)
.exe | Generic Win/DOS Executable (4.4)

EXIF

EXE

UnityVersion: 2019.4.15f1_fbf367ac14e9
ProductVersion: 2019.4.15.16511847
FileVersion: 2019.4.15.16511847
CharacterSet: Unicode
LanguageCode: English (U.S.)
FileSubtype: -
ObjectFileType: Unknown
FileOS: Win32
FileFlags: (none)
FileFlagsMask: 0x003f
ProductVersionNumber: 2019.4.15.62311
FileVersionNumber: 2019.4.15.62311
Subsystem: Windows GUI
SubsystemVersion: 4
ImageVersion: -
OSVersion: 4
EntryPoint: 0x31db7
UninitializedDataSize: -
InitializedDataSize: 1536
CodeSize: 683008
LinkerVersion: 2.25
PEType: PE32
TimeStamp: 2022:01:16 01:24:56+01:00
MachineType: Intel 386 or later, and compatibles

Summary

Architecture: IMAGE_FILE_MACHINE_I386
Subsystem: IMAGE_SUBSYSTEM_WINDOWS_GUI
Compilation Date: 16-Jan-2022 00:24:56
Detected languages:
  • English - United States
FileVersion: 2019.4.15.16511847
ProductVersion: 2019.4.15.16511847
Unity Version: 2019.4.15f1_fbf367ac14e9

DOS Header

Magic number: MZ
Bytes on last page of file: 0x0090
Pages in file: 0x0003
Relocations: 0x0000
Size of header: 0x0004
Min extra paragraphs: 0x0000
Max extra paragraphs: 0xFFFF
Initial SS value: 0x0000
Initial SP value: 0x00B8
Checksum: 0x0000
Initial IP value: 0x0000
Initial CS value: 0x0000
Overlay number: 0x0000
OEM identifier: 0x0000
OEM information: 0x0000
Address of NE header: 0x00000080

PE Headers

Signature: PE
Machine: IMAGE_FILE_MACHINE_I386
Number of sections: 6
Time date stamp: 16-Jan-2022 00:24:56
Pointer to Symbol Table: 0x00000000
Number of symbols: 0
Size of Optional Header: 0x00E0
Characteristics:
  • IMAGE_FILE_32BIT_MACHINE
  • IMAGE_FILE_EXECUTABLE_IMAGE
  • IMAGE_FILE_LARGE_ADDRESS_AWARE

Sections

Name
Virtual Address
Virtual Size
Raw Size
Charateristics
Entropy
0x000B0000
0x00280000
0x0002BA00
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE
7.99829
.rsrc
0x000AE000
0x00002000
0x00000400
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE
1.9147
.data
0x00330000
0x000E4000
0x000E2E00
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE
7.98749

Resources

Title
Entropy
Size
Codepage
Language
Type
1
3.37081
456
UNKNOWN
English - United States
RT_VERSION

Imports

advapi32.dll
gdi32.dll
kernel32.dll
mscoree.dll
oleaut32.dll
shell32.dll
user32.dll
version.dll
No data.
screenshotscreenshotscreenshotscreenshot
All screenshots are available in the full report
All screenshots are available in the full report
Total processes
51
Monitored processes
16
Malicious processes
3
Suspicious processes
4

Behavior graph

Click at the process to see the details
drop and start start rundll32.exe schtasks.exe no specs schtasks.exe no specs schtasks.exe no specs schtasks.exe no specs #DCRAT lsass.exe cmd.exe no specs schtasks.exe no specs lsass.exe no specs schtasks.exe no specs wininit.exe no specs schtasks.exe no specs schtasks.exe no specs csrss.exe no specs schtasks.exe no specs lsass.exe no specs

Process information

PID
CMD
Path
Indicators
Parent process
388schtasks /run /tn lsassC:\Windows\system32\schtasks.execmd.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Manages scheduled tasks
Exit code:
0
Version:
6.1.7600.16385 (win7_rtm.090713-1255)
Modules
Images
c:\windows\system32\schtasks.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\user32.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\lpk.dll
c:\windows\system32\usp10.dll
c:\windows\system32\ole32.dll
520C:\Users\Public\Libraries\csrss.exe C:\Users\Public\Libraries\csrss.exetaskeng.exe
User:
admin
Integrity Level:
MEDIUM
Exit code:
0
Version:
2019.4.15.16511847
Modules
Images
c:\users\public\libraries\csrss.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\kernel32.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\advapi32.dll
1012"C:\Users\admin\AppData\Local\Temp\rundll32.exe" C:\Users\admin\AppData\Local\Temp\rundll32.exe
Explorer.EXE
User:
admin
Integrity Level:
MEDIUM
Exit code:
0
Version:
2019.4.15.16511847
Modules
Images
c:\windows\system32\ntdll.dll
c:\users\admin\appdata\local\temp\rundll32.exe
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\advapi32.dll
1860"C:\MSOCache\All Users\lsass.exe" C:\MSOCache\All Users\lsass.exetaskeng.exe
User:
admin
Integrity Level:
MEDIUM
Exit code:
0
Version:
2019.4.15.16511847
Modules
Images
c:\windows\system32\ntdll.dll
c:\msocache\all users\lsass.exe
c:\windows\system32\kernelbase.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\lpk.dll
c:\windows\system32\user32.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\usp10.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\sechost.dll
1956"C:\MSOCache\All Users\{90140000-0015-0407-0000-0000000FF1CE}-C\lsass.exe" C:\MSOCache\All Users\{90140000-0015-0407-0000-0000000FF1CE}-C\lsass.exe
rundll32.exe
User:
admin
Integrity Level:
MEDIUM
Exit code:
0
Version:
2019.4.15.16511847
Modules
Images
c:\windows\system32\ntdll.dll
c:\msocache\all users\{90140000-0015-0407-0000-0000000ff1ce}-c\lsass.exe
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\advapi32.dll
2008schtasks /run /tn lsassC:\Windows\system32\schtasks.execmd.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Manages scheduled tasks
Exit code:
0
Version:
6.1.7600.16385 (win7_rtm.090713-1255)
Modules
Images
c:\windows\system32\schtasks.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\user32.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\lpk.dll
c:\windows\system32\usp10.dll
c:\windows\system32\ole32.dll
2116schtasks /run /tn csrssC:\Windows\system32\schtasks.execmd.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Manages scheduled tasks
Exit code:
0
Version:
6.1.7600.16385 (win7_rtm.090713-1255)
Modules
Images
c:\windows\system32\schtasks.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\user32.dll
c:\windows\system32\lpk.dll
c:\windows\system32\usp10.dll
c:\windows\system32\ole32.dll
2668schtasks.exe /create /tn "csrss" /sc minute /mo 12 /tr "'C:\Users\Public\Libraries\csrss.exe'" /fC:\Windows\system32\schtasks.exewmiprvse.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Manages scheduled tasks
Exit code:
0
Version:
6.1.7600.16385 (win7_rtm.090713-1255)
Modules
Images
c:\windows\system32\schtasks.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\user32.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\lpk.dll
c:\windows\system32\usp10.dll
c:\windows\system32\ole32.dll
2836schtasks.exe /create /tn "lsass" /sc minute /mo 13 /tr "'C:\MSOCache\All Users\lsass.exe'" /fC:\Windows\system32\schtasks.exewmiprvse.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Manages scheduled tasks
Exit code:
0
Version:
6.1.7600.16385 (win7_rtm.090713-1255)
Modules
Images
c:\windows\system32\schtasks.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\user32.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\lpk.dll
c:\windows\system32\ole32.dll
c:\windows\system32\usp10.dll
2876"C:\MSOCache\All Users\lsass.exe" C:\MSOCache\All Users\lsass.exetaskeng.exe
User:
admin
Integrity Level:
MEDIUM
Exit code:
0
Version:
2019.4.15.16511847
Modules
Images
c:\windows\system32\ntdll.dll
c:\msocache\all users\lsass.exe
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\usp10.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\lpk.dll
c:\windows\system32\user32.dll
c:\windows\system32\advapi32.dll
Total events
1 296
Read events
1 271
Write events
25
Delete events
0

Modification events

(PID) Process:(1012) rundll32.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
Operation:writeName:lsass
Value:
"C:\MSOCache\All Users\{90140000-0015-0407-0000-0000000FF1CE}-C\lsass.exe"
(PID) Process:(1012) rundll32.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
Operation:writeName:wininit
Value:
"C:\ProgramData\Documents\wininit.exe"
(PID) Process:(1012) rundll32.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
Operation:writeName:csrss
Value:
"C:\Users\Public\Libraries\csrss.exe"
(PID) Process:(1012) rundll32.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
Operation:writeName:lsass
Value:
"C:\MSOCache\All Users\lsass.exe"
(PID) Process:(1012) rundll32.exeKey:HKEY_CURRENT_USER\Software\d4130747fc7ddc824a4d1e8172707a050a327583
Operation:writeName:3ae30633dac80af7c2d5f2cf1a2e61673b688726
Value:
WyJDOlxcVXNlcnNcXGFkbWluXFxBcHBEYXRhXFxMb2NhbFxcVGVtcFxccnVuZGxsMzIuZXhlIiwiQzpcXE1TT0NhY2hlXFxBbGwgVXNlcnNcXHs5MDE0MDAwMC0wMDE1LTA0MDctMDAwMC0wMDAwMDAwRkYxQ0V9LUNcXGxzYXNzLmV4ZSIsIkM6XFxQcm9ncmFtRGF0YVxcRG9jdW1lbnRzXFx3aW5pbml0LmV4ZSIsIkM6XFxVc2Vyc1xcUHVibGljXFxMaWJyYXJpZXNcXGNzcnNzLmV4ZSIsIkM6XFxNU09DYWNoZVxcQWxsIFVzZXJzXFxsc2Fzcy5leGUiXQ==
(PID) Process:(1012) rundll32.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
Operation:writeName:ProxyBypass
Value:
1
(PID) Process:(1012) rundll32.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
Operation:writeName:IntranetName
Value:
1
(PID) Process:(1012) rundll32.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
Operation:writeName:UNCAsIntranet
Value:
1
(PID) Process:(1012) rundll32.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
Operation:writeName:AutoDetect
Value:
0
(PID) Process:(1956) lsass.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\lsass_RASAPI32
Operation:writeName:EnableFileTracing
Value:
0
Executable files
4
Suspicious files
0
Text files
4
Unknown types
0

Dropped files

PID
Process
Filename
Type
1012rundll32.exeC:\MSOCache\All Users\{90140000-0015-0407-0000-0000000FF1CE}-C\lsass.exeexecutable
MD5:
SHA256:
1012rundll32.exeC:\Users\Public\Documents\wininit.exeexecutable
MD5:
SHA256:
1012rundll32.exeC:\Users\Public\Documents\56085415360792text
MD5:
SHA256:
1012rundll32.exeC:\MSOCache\All Users\{90140000-0015-0407-0000-0000000FF1CE}-C\6203df4a6bafc7text
MD5:
SHA256:
1012rundll32.exeC:\Users\Public\Libraries\csrss.exeexecutable
MD5:
SHA256:
1012rundll32.exeC:\MSOCache\All Users\lsass.exeexecutable
MD5:
SHA256:
1012rundll32.exeC:\Users\Public\Libraries\886983d96e3d3etext
MD5:
SHA256:
1012rundll32.exeC:\MSOCache\All Users\6203df4a6bafc7text
MD5:
SHA256:
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
2
TCP/UDP connections
2
DNS requests
0
Threats
2

HTTP requests

PID
Process
Method
HTTP Code
IP
URL
CN
Type
Size
Reputation
1956
lsass.exe
GET
91.199.189.135:80
http://91.199.189.135/Voiddb76/6Cdn/1/ProviderwpDle/9/tempwpMulti/ApiProtonjavascript3/3Windows/TestPrivatePhpvoiddb/jsLocal.php?xeSy1zfZT1BFUgwCzX=xjvsbAHByNatfVhKC50lXd3G92KaH3&eO3A8Bw0yuyqL2HftxVuH9wjT=psj0q44b6flUiIQEB0jwsN&76c63ce14f4ca618679cf576f3bc8a9a=358e8385ec166642c1912da3def69d6a&8ccb699102826dc28ebebc561817192a=QYihTOlBzY0cjYhdzYyYzY1MGZkVWZ1gTZyImZlZDZ2MzY3EjMmZDZ&xeSy1zfZT1BFUgwCzX=xjvsbAHByNatfVhKC50lXd3G92KaH3&eO3A8Bw0yuyqL2HftxVuH9wjT=psj0q44b6flUiIQEB0jwsN
RU
malicious
1956
lsass.exe
GET
91.199.189.135:80
http://91.199.189.135/Voiddb76/6Cdn/1/ProviderwpDle/9/tempwpMulti/ApiProtonjavascript3/3Windows/TestPrivatePhpvoiddb/jsLocal.php?xeSy1zfZT1BFUgwCzX=xjvsbAHByNatfVhKC50lXd3G92KaH3&eO3A8Bw0yuyqL2HftxVuH9wjT=psj0q44b6flUiIQEB0jwsN&76c63ce14f4ca618679cf576f3bc8a9a=358e8385ec166642c1912da3def69d6a&8ccb699102826dc28ebebc561817192a=QYihTOlBzY0cjYhdzYyYzY1MGZkVWZ1gTZyImZlZDZ2MzY3EjMmZDZ&xeSy1zfZT1BFUgwCzX=xjvsbAHByNatfVhKC50lXd3G92KaH3&eO3A8Bw0yuyqL2HftxVuH9wjT=psj0q44b6flUiIQEB0jwsN
RU
malicious
Download PCAP, analyze network streams, HTTP content and a lot more at the full report

Connections

PID
Process
IP
Domain
ASN
CN
Reputation
1956
lsass.exe
91.199.189.135:80
ECom-IT Limited
RU
malicious

DNS requests

No data

Threats

PID
Process
Class
Message
1956
lsass.exe
A Network Trojan was detected
ET TROJAN DCRAT Activity (GET)
1956
lsass.exe
A Network Trojan was detected
ET TROJAN DCRAT Activity (GET)
No debug info