MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 fbf79b0e54a606ba74f107e39790bccf1fce6a4f9be65353f97b2a03b43c1c6f. While MalwareBazaar tries to identify whether the sample provided is malicious or not, there is no guarantee that a sample in MalwareBazaar is malicious.

Database Entry


ServHelper


Vendor detections: 9


Intelligence 9 IOCs YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: fbf79b0e54a606ba74f107e39790bccf1fce6a4f9be65353f97b2a03b43c1c6f
SHA3-384 hash: 061b7871be597422a5e6a16b8edd8e36336dce1e30fd07bbce5e193e4e6a95eb36952979141f61182c482e7b6a3ad257
SHA1 hash: 6a9f72dca7ea4ca3489544b5f6bb54d214a20dec
MD5 hash: ec52461953bc8f522572c62a76db3299
humanhash: sweet-beryllium-michigan-friend
File name:ec52461953bc8f522572c62a76db3299.exe
Download: download sample
Signature ServHelper
Create hunting rule
File size:6'342'144 bytes
First seen:2021-03-31 07:36:40 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 4035d2883e01d64f3e7a9dccb1d63af5 (47 x ServHelper, 30 x Vidar, 20 x LummaStealer)
ssdeep 49152:DDGHXFDcnyEbx75ZiTaKSgwGAUYRzbPzyx2ZvBVlrbr105n3223tUDUzNCgvYFKW:OXFDcnyWby
Threatray 83 similar samples on MalwareBazaar
TLSH 8356F152BCD208FAC17EE1708556936176713C6487367BD31E84A6AA1E7AFE42F3E310
Reporter abuse_ch
Tags:exe ServHelper

Intelligence

File Origin
# of uploads :
1
# of downloads :
1'667
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
ec52461953bc8f522572c62a76db3299.exe
Verdict:
No threats detected
Analysis date:
2021-03-31 07:59:21 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/b29ce623-e59f-426f-bf33-31f73da8cf87

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/129214/
Detection(s):
Win.Malware.Bulz-9847817-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file in the system32 subdirectories
Sending a UDP request
Creating a window
Creating a file in the %temp% directory
Launching a process
Creating a process with a hidden window
Deleting a recently created file
Using the Windows Management Instrumentation requests
Forced system process termination
Result
Verdict:
MALICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Result
Threat name:
Unknown
Detection:
malicious
Classification:
evad
Score:
88 / 100
Link:
https://www.joesandbox.com/analysis/659868
Signature
Antivirus detection for dropped file
Bypasses PowerShell execution policy
Creates a Windows Service pointing to an executable in C:\Windows
Multi AV Scanner detection for submitted file
Powershell drops PE file
Queries sensitive service information (via WMI, WIN32_SERVICE, often done to detect sandboxes)
Sigma detected: Dot net compiler compiles file from suspicious location
Uses cmd line tools excessively to alter registry or file data
Yara detected Costura Assembly Loader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 378864 Sample: hTKMEGbjwJ.exe Startdate: 31/03/2021 Architecture: WINDOWS Score: 88 50 Antivirus detection for dropped file 2->50 52 Multi AV Scanner detection for submitted file 2->52 54 Sigma detected: Dot net compiler compiles file from suspicious location 2->54 56 Yara detected Costura Assembly Loader 2->56 8 hTKMEGbjwJ.exe 5 2->8         started        process3 signatures4 58 Bypasses PowerShell execution policy 8->58 11 powershell.exe 50 8->11         started        process5 dnsIp6 46 192.168.2.1 unknown unknown 11->46 40 C:\Windows\Branding\mediasvc.png, PE32+ 11->40 dropped 42 C:\Windows\Branding\mediasrv.png, PE32+ 11->42 dropped 44 C:\Users\user\AppData\...\fvnshzhg.cmdline, UTF-8 11->44 dropped 60 Uses cmd line tools excessively to alter registry or file data 11->60 62 Queries sensitive service information (via WMI, WIN32_SERVICE, often done to detect sandboxes) 11->62 64 Powershell drops PE file 11->64 16 reg.exe 11->16         started        19 csc.exe 11->19         started        22 csc.exe 11->22         started        24 5 other processes 11->24 file7 signatures8 process9 file10 48 Creates a Windows Service pointing to an executable in C:\Windows 16->48 36 C:\Users\user\AppData\Local\...\fvnshzhg.dll, PE32 19->36 dropped 26 cvtres.exe 19->26         started        38 C:\Users\user\AppData\Local\...\ba1alazj.dll, PE32 22->38 dropped 28 cvtres.exe 22->28         started        30 conhost.exe 24->30         started        32 conhost.exe 24->32         started        34 conhost.exe 24->34         started        signatures11 process12
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/fbf79b0e54a606ba74f107e39790bccf1fce6a4f9be65353f97b2a03b43c1c6f/
Threat name:
Win64.Trojan.WinGoGoCLR
Create hunting rule
Status:
Malicious
First seen:
2021-03-31 07:37:08 UTC
AV detection:
18 of 48 (37.50%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=7p3zwdsuuydlu5hra7rzpef4z4p442sptptfgu7zpmvahnb4drxq._file
Verdict:
malicious
Similar samples:
106c0169d2464a9efe9ee45c1e7c5863764e6d9fca3809bb249bbb97d3cf3086
ServHelper
1780d38ef73129177134042720cfc526fe012760f406e9e030d8d5fbbdfb7828
ServHelper
4411d8a69230284cb6238a2e8cf29878afbbef90935bb94d1a6f8d59af30c6cc
ServHelper
499e3672259c28f6bd35d790c2ec4f52835cfcd46c8ddf279df4b02d4d07d7e5
ServHelper
5090fa74f83368086c1d197dcd28e51f8b36cd5d2c18e9a964d925a445ea0066
ServHelper
706a3b4438e7b883d8c3cd66ffabfbb3e3495b3b7c6f9b48adf7a5c8cdd0c3c1
ServHelper
bac78c78e97c8458437ffcbb31b4a54a141200a8cb656eac2dcab06691bc4a91
ServHelper
c394b83a255961adb3ec0c8e35b21e05ee432b3c758b25ceac7e3dc3a10486a7
ServHelper
ec85f413a53709831c4f1774f78d009dcf2f531006484a3b396992703bba2da1
ServHelper
eed912423954b56dc4ea01f9d3fb1c46ea175be378889fd886e37c09954cfaba
ServHelper
+ 73 additional samples on MalwareBazaar
Result
Malware family:
servhelper
Create hunting rule
Score:
  10/10
Tags:
family:servhelper backdoor discovery exploit persistence trojan upx
Link:
https://tria.ge/reports/210331-36jkpbztds/
Behaviour
Modifies data under HKEY_USERS
Modifies registry key
Runs net.exe
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: LoadsDriver
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Drops file in Windows directory
Drops file in System32 directory
Loads dropped DLL
Modifies file permissions
Blocklisted process makes network request
Modifies RDP port number used by Windows
Possible privilege escalation attempt
Sets DLL path for service in the registry
UPX packed file
Grants admin privileges
ServHelper
Malware Config
Dropper Extraction:
https://raw.githubusercontent.com/sqlitey/sqlite/master/speed.ps1
Unpacked files
SH256 hash:
fbf79b0e54a606ba74f107e39790bccf1fce6a4f9be65353f97b2a03b43c1c6f
MD5 hash:
ec52461953bc8f522572c62a76db3299
SHA1 hash:
6a9f72dca7ea4ca3489544b5f6bb54d214a20dec
Link:
https://www.unpac.me/results/76191c57-faf5-4589-a442-f5ee8526102d/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/fbf79b0e54a606ba74f107e39790bccf1fce6a4f9be65353f97b2a03b43c1c6f

YARA Signatures

MalwareBazaar uses YARA rules from several public and non-public repositories, such as YARAhub and Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious process dumps they may create. Please note that only results from TLP:CLEAR rules are being displayed.

Rule name:adonunix2
Create hunting rule
Author:Tim Brown @timb_machine
Description:AD on UNIX
Rule name:suspicious_packer_section
Create hunting rule
Author:@j0sm1
Description:The packer/protector section names/keywords
Reference:http://www.hexacorn.com/blog/2012/10/14/random-stats-from-1-2m-samples-pe-section-names/
Rule name:susp_winsvc_upx
Create hunting rule
Author:SBousseaden
Description:broad hunt for any PE exporting ServiceMain API and upx packed
Rule name:win_servhelper_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:autogenerated rule brought to you by yara-signator

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Web download

ServHelper

Executable exe fbf79b0e54a606ba74f107e39790bccf1fce6a4f9be65353f97b2a03b43c1c6f

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/1083192/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/129214/

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