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File name:

C:\Users\admin\AppData\Roaming\System32\csrss.exe

Full analysis: https://app.any.run/tasks/7874b3bf-a154-4925-9265-da9826d34867
Verdict: Malicious activity
Analysis date: December 06, 2019, 21:11:18
OS: Windows 7 Professional Service Pack 1 (build: 7601, 32 bit)
Indicators:
MIME: application/x-dosexec
File info: PE32 executable (GUI) Intel 80386, for MS Windows
MD5:

D568B385F88AB014A97E83D2A2D7DCD1

SHA1:

F0F9DCBBE3CB8099203738F10A0C0F0EF334EF8C

SHA256:

35B894D22337945F4DA4DC7B37899197A45B27B72D40BD9690D8342197920128

SSDEEP:

3072:FseiwBMmSypB/xzI1w02caztqrnk2JFanRETbq6RP3qhaVm:6I3I1XBaztqrk2JYnRi5RPej

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

    • Uses SVCHOST.EXE for hidden code execution

      • csrss.exe (PID: 460)

    • Changes the autorun value in the registry

      • csrss.exe (PID: 460)
      • svchost.exe (PID: 1780)

  • SUSPICIOUS

    • Application launched itself

      • csrss.exe (PID: 960)

    • Creates files in the user directory

      • csrss.exe (PID: 460)

    • Executable content was dropped or overwritten

      • csrss.exe (PID: 460)

    • Starts Internet Explorer

      • csrss.exe (PID: 460)

  • INFO

    • Creates files in the user directory

      • WINWORD.EXE (PID: 2892)
      • iexplore.exe (PID: 324)

    • Manual execution by user

      • WINWORD.EXE (PID: 2892)

    • Reads Microsoft Office registry keys

      • WINWORD.EXE (PID: 2892)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
No Malware configuration.

TRiD

.exe | Win32 Executable MS Visual C++ (generic) (42.2)
.exe | Win64 Executable (generic) (37.3)
.dll | Win32 Dynamic Link Library (generic) (8.8)
.exe | Win32 Executable (generic) (6)
.exe | Generic Win/DOS Executable (2.7)

EXIF

EXE

MachineType: Intel 386 or later, and compatibles
TimeStamp: 2005:07:07 20:17:44+02:00
PEType: PE32
LinkerVersion: 7
CodeSize: 32768
InitializedDataSize: 49152
UninitializedDataSize: -
EntryPoint: 0x39c1
OSVersion: 4
ImageVersion: -
SubsystemVersion: 4
Subsystem: Windows GUI
FileVersionNumber: 1.0.1.55
ProductVersionNumber: 1.0.1.55
FileFlagsMask: 0x0017
FileFlags: (none)
FileOS: Win32
ObjectFileType: Executable application
FileSubtype: -
LanguageCode: English (U.S.)
CharacterSet: Unicode
CompanyName: Nullriver Software
FileDescription: Create MD5 check sums
FileVersion: 1.0.1.55
InternalName: winMd5Sum
LegalCopyright: Copyright (C) 2002-2005
OriginalFileName: winMd5Sum.exe
ProductName: winMd5Sum
ProductVersion: 1.0.1.55

Summary

Architecture: IMAGE_FILE_MACHINE_I386
Subsystem: IMAGE_SUBSYSTEM_WINDOWS_GUI
Compilation Date: 07-Jul-2005 18:17:44
Detected languages:
  • English - United States
CompanyName: Nullriver Software
FileDescription: Create MD5 check sums
FileVersion: 1.0.1.55
InternalName: winMd5Sum
LegalCopyright: Copyright (C) 2002-2005
OriginalFilename: winMd5Sum.exe
ProductName: winMd5Sum
ProductVersion: 1.0.1.55

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: 0x000000E0

PE Headers

Signature: PE
Machine: IMAGE_FILE_MACHINE_I386
Number of sections: 5
Time date stamp: 07-Jul-2005 18:17:44
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_LINE_NUMS_STRIPPED
  • IMAGE_FILE_LOCAL_SYMS_STRIPPED
  • IMAGE_FILE_RELOCS_STRIPPED

Sections

Name
Virtual Address
Virtual Size
Raw Size
Charateristics
Entropy
.text
0x00001000
0x00007C8A
0x00008000
IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ
6.51663
.rdata
0x00015000
0x00016910
0x00017000
IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ
7.69921
.data
0x0000B000
0x00001E78
0x00001000
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE
0.987608
.rsrc
0x0000D000
0x000072D8
0x00008000
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ
4.4878

Resources

Title
Entropy
Size
Codepage
Language
Type
1
3.42411
740
UNKNOWN
English - United States
RT_VERSION
2
4.89783
654
UNKNOWN
English - United States
RT_MANIFEST
3
5.83428
1736
UNKNOWN
English - United States
RT_ICON
4
5.86629
1384
UNKNOWN
English - United States
RT_ICON
5
4.17828
9640
UNKNOWN
English - United States
RT_ICON
6
4.44003
4264
UNKNOWN
English - United States
RT_ICON
7
4.56617
2440
UNKNOWN
English - United States
RT_ICON
8
4.73503
1128
UNKNOWN
English - United States
RT_ICON
101
3.14615
600
UNKNOWN
English - United States
RT_DIALOG
102
2.85812
118
UNKNOWN
English - United States
RT_GROUP_ICON

Imports

KERNEL32.DLL
SHELL32.dll
USER32.dll
No data.
screenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshot
All screenshots are available in the full report
All screenshots are available in the full report
Total processes
39
Monitored processes
5
Malicious processes
3
Suspicious processes
0

Behavior graph

Click at the process to see the details
start csrss.exe no specs csrss.exe winword.exe no specs svchost.exe iexplore.exe no specs

Process information

PID
CMD
Path
Indicators
Parent process
960"C:\Users\admin\AppData\Local\Temp\csrss.exe" C:\Users\admin\AppData\Local\Temp\csrss.exe—explorer.exe
User:
admin
Company:
Nullriver Software
Integrity Level:
MEDIUM
Description:
Create MD5 check sums
Exit code:
0
Version:
1.0.1.55
460"C:\Users\admin\AppData\Local\Temp\csrss.exe" C:\Users\admin\AppData\Local\Temp\csrss.exe
csrss.exe
User:
admin
Company:
Nullriver Software
Integrity Level:
MEDIUM
Description:
Create MD5 check sums
Exit code:
0
Version:
1.0.1.55
2892"C:\Program Files\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\admin\Desktop\coloradocenter.rtf"C:\Program Files\Microsoft Office\Office14\WINWORD.EXE—explorer.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Microsoft Word
Version:
14.0.6024.1000
1780svchost.exeC:\Windows\system32\svchost.exe
csrss.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Host Process for Windows Services
Version:
6.1.7600.16385 (win7_rtm.090713-1255)
324"C:\Program Files\Internet Explorer\iexplore.exe"C:\Program Files\Internet Explorer\iexplore.exe—csrss.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Internet Explorer
Version:
8.00.7600.16385 (win7_rtm.090713-1255)
Total events
1 453
Read events
746
Write events
0
Delete events
0

Modification events

No data
Executable files
1
Suspicious files
1
Text files
3
Unknown types
4

Dropped files

PID
Process
Filename
Type
2892WINWORD.EXEC:\Users\admin\AppData\Local\Temp\CVRFC2D.tmp.cvr —
MD5:—
SHA256:—
460csrss.exeC:\Users\admin\AppData\Roaming\Microsoft\Windows\BxQf2TMR.cfgbinary
MD5:C208A5E86515DB9C437CDAC382D7A72B
SHA256:CD444FBA5E992018F1DBF8517637C00680E1BA92A98C0F6AB43B52AFD66017B1
2892WINWORD.EXEC:\Users\admin\AppData\Roaming\Microsoft\Office\Recent\index.datini
MD5:1F88667194365599D5126479EC484DEB
SHA256:BDBC970642544CA58455BA7BB5C8EA343F4C8C0201D587AB4C3849DC2221A09B
460csrss.exeC:\Users\admin\AppData\Roaming\System32\csrss.exeexecutable
MD5:D568B385F88AB014A97E83D2A2D7DCD1
SHA256:35B894D22337945F4DA4DC7B37899197A45B27B72D40BD9690D8342197920128
2892WINWORD.EXEC:\Users\admin\Desktop\~$loradocenter.rtfpgc
MD5:F67C4D3E66F78AAB121504F638061A0A
SHA256:B5BE5BEF2FC3A9B8C5D26FCDD136F38E7B84289ADD6178B4FBF6BA11F3C58EAC
2892WINWORD.EXEC:\Users\admin\AppData\Roaming\Microsoft\Templates\~$Normal.dotmpgc
MD5:75B1C22F4F1552E6473C377C647FA1D7
SHA256:E92E9C9622C7EABAB46B6C5F57A36FF1F3C79B235062C68BE9E255BC3BC0067F
2892WINWORD.EXEC:\Users\admin\AppData\Roaming\Microsoft\Office\Recent\coloradocenter.rtf.LNKlnk
MD5:95666A57D5274129996C02CAD09B338E
SHA256:CBB55FAFAB0B9CB071894D98A35FD5C6BD0E3227B76B85FD818E4E328CD3E49F
2892WINWORD.EXEC:\Users\admin\AppData\Roaming\Microsoft\UProof\ExcludeDictionaryEN0409.lextext
MD5:F3B25701FE362EC84616A93A45CE9998
SHA256:B3D510EF04275CA8E698E5B3CBB0ECE3949EF9252F0CDC839E9EE347409A2209
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
0
TCP/UDP connections
0
DNS requests
1
Threats
0

HTTP requests

No HTTP requests
Download PCAP, analyze network streams, HTTP content and a lot more at the full report

Connections

No data

DNS requests

Domain
IP
Reputation
csrss.no-ip.biz
  • 0.0.0.0
unknown

Threats

PID
Process
Class
Message
—
—
Potentially Bad Traffic
ET INFO DYNAMIC_DNS Query to a Suspicious no-ip Domain
—
—
Potentially Bad Traffic
ET INFO Observed DNS Query to .biz TLD
No debug info
Interactive malware hunting service ANY.RUN
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Reports
C:\Users\admin\AppData\Roaming\System32\csrss.exe