File name:

Uninstall.exe

Full analysis: https://app.any.run/tasks/5f4726b6-dc14-4e3e-8ccf-a63c300ffbd4
Verdict: Malicious activity
Analysis date: March 16, 2022, 07:15:56
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, Nullsoft Installer self-extracting archive
MD5:

73EC3E6690903F20080DCBF5C984AD2B

SHA1:

9BDFB4504DBFC557432E19858A7F7A5E133419CA

SHA256:

C88467EDC2DB09BD8D0C04D15716DFA37DFE145E745054D609B7C6FDC55577ED

SSDEEP:

24576:Lbk88SX2Me9HSM7o05vp83flwI678/AD1Uz8cIm8kRUABg9OHkhqMfQsYvoq5NNC:Pt8SVHNYGtc7FDk5l7aokh3QPMr

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

    • Drops executable file immediately after starts

      • Uninstall.exe (PID: 3732)

    • Loads dropped or rewritten executable

      • Un_A.exe (PID: 3852)

  • SUSPICIOUS

    • Reads the computer name

      • Uninstall.exe (PID: 3732)
      • Un_A.exe (PID: 3852)

    • Checks supported languages

      • Uninstall.exe (PID: 3732)
      • Un_A.exe (PID: 3852)
      • ns6800.tmp (PID: 1340)
      • nsB110.tmp (PID: 480)

    • Executable content was dropped or overwritten

      • Uninstall.exe (PID: 3732)
      • Un_A.exe (PID: 3852)

    • Starts itself from another location

      • Uninstall.exe (PID: 3732)

    • Uses TASKKILL.EXE to kill process

      • ns6800.tmp (PID: 1340)

    • Starts application with an unusual extension

      • Un_A.exe (PID: 3852)

  • INFO

    • Checks supported languages

      • taskkill.exe (PID: 2504)

    • Reads the computer name

      • taskkill.exe (PID: 2504)

    • Dropped object may contain Bitcoin addresses

      • Un_A.exe (PID: 3852)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
No Malware configuration.

TRiD

.exe | Win32 Executable (generic) (52.9)
.exe | Generic Win/DOS Executable (23.5)
.exe | DOS Executable Generic (23.5)

EXIF

EXE

ProductVersion: 1.0.3.165
ProductName: Grammarly for Windows
LegalCopyright: Copyright © 2009-2021 Grammarly Inc.
FileVersion: 1.0.3.165
FileDescription: Grammarly for Windows
CompanyName: -
CharacterSet: Unicode
LanguageCode: English (U.S.)
FileSubtype: -
ObjectFileType: Executable application
FileOS: Win32
FileFlags: (none)
FileFlagsMask: 0x0000
ProductVersionNumber: 1.0.3.165
FileVersionNumber: 1.0.3.165
Subsystem: Windows GUI
SubsystemVersion: 4
ImageVersion: 6
OSVersion: 4
EntryPoint: 0x352d
UninitializedDataSize: 2048
InitializedDataSize: 186880
CodeSize: 27136
LinkerVersion: 6
PEType: PE32
TimeStamp: 2021:09:25 23:57:46+02:00
MachineType: Intel 386 or later, and compatibles

Summary

Architecture: IMAGE_FILE_MACHINE_I386
Subsystem: IMAGE_SUBSYSTEM_WINDOWS_GUI
Compilation Date: 25-Sep-2021 21:57:46
Detected languages:
  • English - United States
CompanyName: -
FileDescription: Grammarly for Windows
FileVersion: 1.0.3.165
LegalCopyright: Copyright © 2009-2021 Grammarly Inc.
ProductName: Grammarly for Windows
ProductVersion: 1.0.3.165

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: 0x000000D8

PE Headers

Signature: PE
Machine: IMAGE_FILE_MACHINE_I386
Number of sections: 5
Time date stamp: 25-Sep-2021 21:57:46
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
0x00006897
0x00006A00
IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ
6.4584
.rdata
0x00008000
0x000014A6
0x00001600
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ
5.02411
.data
0x0000A000
0x0002B018
0x00000600
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE
4.15458
.ndata
0x00036000
0x00018000
0x00000000
IMAGE_SCN_CNT_UNINITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE
0
.rsrc
0x0004E000
0x00046728
0x00046800
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ
2.72975

Resources

Title
Entropy
Size
Codepage
Language
Type
1
5.28666
1249
UNKNOWN
English - United States
RT_MANIFEST
2
3.767
9640
UNKNOWN
English - United States
RT_ICON
3
3.73602
4264
UNKNOWN
English - United States
RT_ICON
4
4.11928
1128
UNKNOWN
English - United States
RT_ICON
103
0.832925
62
UNKNOWN
English - United States
RT_GROUP_ICON
105
1.96667
224
UNKNOWN
English - United States
RT_DIALOG
106
2.65703
248
UNKNOWN
English - United States
RT_DIALOG
111
2.48825
96
UNKNOWN
English - United States
RT_DIALOG

Imports

ADVAPI32.dll
COMCTL32.dll
GDI32.dll
KERNEL32.dll
SHELL32.dll
USER32.dll
ole32.dll
No data.
screenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshot
All screenshots are available in the full report
All screenshots are available in the full report
Total processes
41
Monitored processes
5
Malicious processes
1
Suspicious processes
1

Behavior graph

Click at the process to see the details
drop and start start uninstall.exe un_a.exe ns6800.tmp no specs taskkill.exe no specs nsb110.tmp no specs

Process information

PID
CMD
Path
Indicators
Parent process
480"C:\Users\admin\AppData\Local\Temp\nsk67FF.tmp\nsB110.tmp" C:\Users\admin\AppData\Local\Temp\Grammarly.Desktop.exe uninstallC:\Users\admin\AppData\Local\Temp\nsk67FF.tmp\nsB110.tmp—Un_A.exe
User:
admin
Integrity Level:
MEDIUM
Exit code:
3221225501
Modules
Images
c:\users\admin\appdata\local\temp\nsk67ff.tmp\nsb110.tmp
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
1340"C:\Users\admin\AppData\Local\Temp\nsk67FF.tmp\ns6800.tmp" taskkill /f /im Grammarly.Desktop.exeC:\Users\admin\AppData\Local\Temp\nsk67FF.tmp\ns6800.tmp—Un_A.exe
User:
admin
Integrity Level:
MEDIUM
Exit code:
128
Modules
Images
c:\users\admin\appdata\local\temp\nsk67ff.tmp\ns6800.tmp
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
2504taskkill /f /im Grammarly.Desktop.exeC:\Windows\system32\taskkill.exe—ns6800.tmp
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Terminates Processes
Exit code:
128
Version:
6.1.7600.16385 (win7_rtm.090713-1255)
Modules
Images
c:\windows\system32\taskkill.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\version.dll
c:\windows\system32\user32.dll
3732"C:\Users\admin\AppData\Local\Temp\Uninstall.exe" C:\Users\admin\AppData\Local\Temp\Uninstall.exe
Explorer.EXE
User:
admin
Integrity Level:
MEDIUM
Description:
Grammarly for Windows
Exit code:
0
Version:
1.0.3.165
Modules
Images
c:\users\admin\appdata\local\temp\uninstall.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\shell32.dll
c:\windows\system32\shlwapi.dll
3852"C:\Users\admin\AppData\Local\Temp\~nsu.tmp\Un_A.exe" _?=C:\Users\admin\AppData\Local\Temp\C:\Users\admin\AppData\Local\Temp\~nsu.tmp\Un_A.exe
Uninstall.exe
User:
admin
Integrity Level:
MEDIUM
Description:
Grammarly for Windows
Exit code:
0
Version:
1.0.3.165
Modules
Images
c:\users\admin\appdata\local\temp\~nsu.tmp\un_a.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\shell32.dll
c:\windows\system32\rpcrt4.dll
c:\windows\system32\shlwapi.dll
c:\windows\system32\sechost.dll
Total events
1 571
Read events
1 571
Write events
0
Delete events
0

Modification events

No data
Executable files
5
Suspicious files
0
Text files
1
Unknown types
0

Dropped files

PID
Process
Filename
Type
3732Uninstall.exeC:\Users\admin\AppData\Local\Temp\~nsu.tmp\Un_A.exeexecutable
MD5:—
SHA256:—
3852Un_A.exeC:\Users\admin\AppData\Local\Temp\nsk67FF.tmp\nsB110.tmpexecutable
MD5:675C4948E1EFC929EDCABFE67148EDDD
SHA256:1076CA39C449ED1A968021B76EF31F22A5692DFAFEEA29460E8D970A63C59906
3852Un_A.exeC:\Users\admin\AppData\Local\Temp\nsk67FF.tmp\NScurl.dllexecutable
MD5:0181F50F200D865C3F25383C1773EB29
SHA256:8EA0BAC42BFB5236ABD54E980691B87ACD2576E2BD375B36F23EF1FA3BD0EF7F
3852Un_A.exeC:\Users\admin\AppData\Local\Temp\nsk67FF.tmp\cacert.pemtext
MD5:3F52E40243F5FEDE19A3C8372268E1D5
SHA256:A3B534269C6974631DB35F952E8D7C7DBF3D81AB329A232DF575C2661DE1214A
3852Un_A.exeC:\Users\admin\AppData\Local\Temp\nsk67FF.tmp\ns6800.tmpexecutable
MD5:675C4948E1EFC929EDCABFE67148EDDD
SHA256:1076CA39C449ED1A968021B76EF31F22A5692DFAFEEA29460E8D970A63C59906
3852Un_A.exeC:\Users\admin\AppData\Local\Temp\nsk67FF.tmp\nsExec.dllexecutable
MD5:675C4948E1EFC929EDCABFE67148EDDD
SHA256:1076CA39C449ED1A968021B76EF31F22A5692DFAFEEA29460E8D970A63C59906
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
0
TCP/UDP connections
1
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

PID
Process
IP
Domain
ASN
CN
Reputation
3852
Un_A.exe
3.233.82.166:443
femetrics.grammarly.io
—
US
unknown

DNS requests

Domain
IP
Reputation
femetrics.grammarly.io
  • 3.233.82.166
  • 34.201.90.30
  • 35.153.81.12
  • 34.205.251.154
  • 52.4.173.148
  • 3.208.111.114
  • 34.224.198.24
  • 54.90.226.227
suspicious

Threats

No threats detected
No debug info
Interactive malware hunting service ANY.RUN
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Reports
Uninstall.exe