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File name:

flk.exe

Full analysis: https://app.any.run/tasks/113a6d57-7498-4fe2-9ab6-a371ea26e52b
Verdict: Malicious activity
Threats:

Trojans are a group of malicious programs distinguished by their ability to masquerade as benign software. Depending on their type, trojans possess a variety of capabilities, ranging from maintaining full remote control over the victim’s machine to stealing data and files, as well as dropping other malware. At the same time, the main functionality of each trojan family can differ significantly depending on its type. The most common trojan infection chain starts with a phishing email.

Analysis date: November 15, 2018, 08:37:28
OS: Windows 7 Professional Service Pack 1 (build: 7601, 32 bit)
Tags:
trojan
opendir
Indicators:
MIME: application/x-dosexec
File info: PE32 executable (GUI) Intel 80386, for MS Windows
MD5:

13CC98FCB654AC83CDA6D3EC9946FA9B

SHA1:

2CD620CEA310B0EDB68E4BB27301B2563191287B

SHA256:

0E0729B51709325688F2741E2D5C6B3F547901837D89C203CB8AA2985B5F0018

SSDEEP:

3072:sworbBFppjjAu82PEKBlI9r20uYNk9TAAn4o0eA:s9rFFHjLSKBlI9r20uYNk9TwD

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

      • flk.exe (PID: 3360)
  • SUSPICIOUS

    • Uses SYSTEMINFO.EXE to read environment

      • cmd.exe (PID: 3028)
    • Creates files in the user directory

      • flk.exe (PID: 3360)
    • Executable content was dropped or overwritten

      • flk.exe (PID: 3360)
    • Starts CMD.EXE for commands execution

      • flk.exe (PID: 3360)
    • Creates files in the program directory

      • cmd.exe (PID: 3028)
    • Uses IPCONFIG.EXE to discover IP address

      • cmd.exe (PID: 3412)
    • Starts NET.EXE for network exploration

      • cmd.exe (PID: 3456)
    • Uses WHOAMI.EXE to obtaining logged on user information

      • cmd.exe (PID: 3436)
    • Connects to server without host name

      • flk.exe (PID: 3360)
  • INFO

    No info indicators.
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: 2018:10:31 10:10:07+01:00
PEType: PE32
LinkerVersion: 11
CodeSize: 29696
InitializedDataSize: 81920
UninitializedDataSize: -
EntryPoint: 0x2a20
OSVersion: 5.1
ImageVersion: -
SubsystemVersion: 5.1
Subsystem: Windows GUI
FileVersionNumber: 2.0.4.9
ProductVersionNumber: 2.0.4.9
FileFlagsMask: 0x003f
FileFlags: (none)
FileOS: Windows NT 32-bit
ObjectFileType: Executable application
FileSubtype: -
LanguageCode: Unknown (0464)
CharacterSet: Unicode
CompanyName: MS DefenderApplication
FileDescription: MS DefenderApplicationController
FileVersion: 2.0.4.9
LegalCopyright: DefenderApplication Copyright (C) 1993 - 2018
OriginalFileName: DefenderApplication.exe
ProductVersion: 2.0.4.9

Summary

Architecture: IMAGE_FILE_MACHINE_I386
Subsystem: IMAGE_SUBSYSTEM_WINDOWS_GUI
Compilation Date: 31-Oct-2018 09:10:07
Detected languages:
  • English - United States
CompanyName: MS DefenderApplication
FileDescription: MS DefenderApplicationController
FileVersion: 2.0.4.9
LegalCopyright: DefenderApplication Copyright (C) 1993 - 2018
OriginalFilename: DefenderApplication.exe
ProductVersion: 2.0.4.9

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: 0x000000E8

PE Headers

Signature: PE
Machine: IMAGE_FILE_MACHINE_I386
Number of sections: 5
Time date stamp: 31-Oct-2018 09:10:07
Pointer to Symbol Table: 0x00000000
Number of symbols: 0
Size of Optional Header: 0x00E0
Characteristics:
  • IMAGE_FILE_32BIT_MACHINE
  • IMAGE_FILE_EXECUTABLE_IMAGE

Sections

Name
Virtual Address
Virtual Size
Raw Size
Charateristics
Entropy
.text
0x00001000
0x000072C0
0x00007400
IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ
6.47208
.rdata
0x00009000
0x000059E2
0x00005A00
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ
4.82613
.data
0x0000F000
0x00002D34
0x00000E00
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE
2.36702
.rsrc
0x00012000
0x0000A038
0x0000A200
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ
5.00551
.reloc
0x0001D000
0x000014A0
0x00001600
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ
4.93222

Resources

Title
Entropy
Size
Codepage
Language
Type
1
4.8858
145
UNKNOWN
English - United States
RT_MANIFEST
81
2.22224
80
UNKNOWN
English - United States
RT_STRING
83
3.37872
288
UNKNOWN
English - United States
RT_STRING
87
2.59708
102
UNKNOWN
English - United States
RT_STRING
89
2.19869
78
UNKNOWN
English - United States
RT_STRING
90
3.13445
178
UNKNOWN
English - United States
RT_STRING
98
2.7097
124
UNKNOWN
English - United States
RT_STRING
99
2.33905
84
UNKNOWN
English - United States
RT_STRING
101
2.66004
108
UNKNOWN
English - United States
RT_STRING
128
2.45714
94
UNKNOWN
English - United States
RT_STRING

Imports

ADVAPI32.dll
COMDLG32.dll
GDI32.dll
KERNEL32.dll
SHELL32.dll
SHLWAPI.dll
USER32.dll
WININET.dll
WINSPOOL.DRV
ole32.dll
No data.
screenshot
All screenshots are available in the full report
All screenshots are available in the full report
Total processes
47
Monitored processes
9
Malicious processes
1
Suspicious processes
0

Behavior graph

Click at the process to see the details
start flk.exe cmd.exe no specs systeminfo.exe no specs cmd.exe no specs net.exe no specs cmd.exe no specs ipconfig.exe no specs cmd.exe no specs whoami.exe no specs

Process information

PID
CMD
Path
Indicators
Parent process
3360"C:\Users\admin\AppData\Local\Temp\flk.exe" C:\Users\admin\AppData\Local\Temp\flk.exe
explorer.exe
User:
admin
Company:
MS DefenderApplication
Integrity Level:
MEDIUM
Description:
MS DefenderApplicationController
Version:
2.0.4.9
3028"C:\Windows\System32\cmd.exe" /C systeminfo >> C:\ProgramData\INFOCONTENT.TXTC:\Windows\System32\cmd.exeflk.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Windows Command Processor
Exit code:
0
Version:
6.1.7601.17514 (win7sp1_rtm.101119-1850)
3480systeminfo C:\Windows\system32\systeminfo.execmd.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Displays system information
Exit code:
0
Version:
6.1.7600.16385 (win7_rtm.090713-1255)
3456"C:\Windows\System32\cmd.exe" /C net view >>C:\ProgramData\INFOCONTENT.TXTC:\Windows\System32\cmd.exeflk.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Windows Command Processor
Exit code:
0
Version:
6.1.7601.17514 (win7sp1_rtm.101119-1850)
652net view C:\Windows\system32\net.execmd.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Net Command
Exit code:
0
Version:
6.1.7600.16385 (win7_rtm.090713-1255)
3412"C:\Windows\System32\cmd.exe" /C ipconfig >> C:\ProgramData\INFOCONTENT.TXTC:\Windows\System32\cmd.exeflk.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Windows Command Processor
Exit code:
0
Version:
6.1.7601.17514 (win7sp1_rtm.101119-1850)
3812ipconfig C:\Windows\system32\ipconfig.execmd.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
IP Configuration Utility
Exit code:
0
Version:
6.1.7600.16385 (win7_rtm.090713-1255)
3436"C:\Windows\System32\cmd.exe" /C whoami >> C:\ProgramData\INFOCONTENT.TXTC:\Windows\System32\cmd.exeflk.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Windows Command Processor
Exit code:
0
Version:
6.1.7601.17514 (win7sp1_rtm.101119-1850)
3832whoami C:\Windows\system32\whoami.execmd.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
whoami - displays logged on user information
Exit code:
0
Version:
6.1.7600.16385 (win7_rtm.090713-1255)
Total events
127
Read events
106
Write events
0
Delete events
0

Modification events

No data
Executable files
1
Suspicious files
0
Text files
4
Unknown types
0

Dropped files

PID
Process
Filename
Type
3456cmd.exeC:\ProgramData\INFOCONTENT.TXTtext
MD5:745FD1C64E2F48E0D03617576598FE98
SHA256:F12EB0A3E7FF8A534BC5216EC1A2C101094E0D7D15FC9087D3931D6FABBF7ABC
3412cmd.exeC:\ProgramData\INFOCONTENT.TXTtext
MD5:A9CD3ED9EDA7B4AE79200A2168F54A8A
SHA256:C37E502201D17A75FA5EC7C76B38AC416DAAD305C244CFA8FBF3AC8F8E9E8B01
3028cmd.exeC:\ProgramData\INFOCONTENT.TXTtext
MD5:ED7C42C3DAFC42ADB98601A931913DBF
SHA256:CF9CD0CCD90D4F5A2DFED22EECDE5AEE90709C641EC0BA1A3B8F38FA77ECDAFC
3436cmd.exeC:\ProgramData\INFOCONTENT.TXTtext
MD5:4287D8CF74B7B994403BB6006DF5928C
SHA256:DF1F48E7528DE9E58D93604EF18ACB2703639D2BD3CD3A069B15CD0E7B773C7E
3360flk.exeC:\Users\admin\AppData\Roaming\conhost.exe 1C9B74E8.exeexecutable
MD5:13CC98FCB654AC83CDA6D3EC9946FA9B
SHA256:0E0729B51709325688F2741E2D5C6B3F547901837D89C203CB8AA2985B5F0018
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
3
TCP/UDP connections
2
DNS requests
0
Threats
0

HTTP requests

PID
Process
Method
HTTP Code
IP
URL
CN
Type
Size
Reputation
3360
flk.exe
POST
200
146.0.72.188:80
http://146.0.72.188/ipv6/mod/checker_info.php
NL
text
65 b
malicious
3360
flk.exe
GET
200
146.0.72.188:80
http://146.0.72.188/ipv6/ipvcheck.php?dns=c4ba3647
NL
text
5 b
malicious
3360
flk.exe
GET
200
146.0.72.188:80
http://146.0.72.188/ipv6/ipvcheck.php?dns=c4ba3647
NL
text
5 b
malicious
Download PCAP, analyze network streams, HTTP content and a lot more at the full report

Connections

PID
Process
IP
Domain
ASN
CN
Reputation
3360
flk.exe
146.0.72.188:80
Hostkey B.v.
NL
malicious

DNS requests

No data

Threats

PID
Process
Class
Message
3360
flk.exe
A Network Trojan was detected
MALWARE [PTsecurity] SystemInfo Exfiltration
3360
flk.exe
A Network Trojan was detected
MALWARE [PTsecurity] SystemInfo Exfiltration
3360
flk.exe
Potentially Bad Traffic
GPL ATTACK_RESPONSE command completed
3360
flk.exe
A Network Trojan was detected
ET TROJAN TrueBot/Silence.Downloader Keep-Alive
3360
flk.exe
Misc activity
SUSPICIOUS [PTsecurity] Possible TrojanDownloader
3360
flk.exe
A Network Trojan was detected
ET TROJAN TrueBot/Silence.Downloader Keep-Alive
3360
flk.exe
Misc activity
SUSPICIOUS [PTsecurity] Possible TrojanDownloader
No debug info