MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a27fa7724da938df040a3e535f2be9cec4d6d93bd4f2e5ec2ba79560f84cb69c. 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 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a27fa7724da938df040a3e535f2be9cec4d6d93bd4f2e5ec2ba79560f84cb69c
SHA3-384 hash: d380aa29b86959c5de13d31d9066b03ff646b3dacba7d51b1a468d6a07e34fedd47b54eac009d1910c33287406bc1719
SHA1 hash: 4541953ab415ed1b7cd7b11abb588d90b8566d03
MD5 hash: 2bfa2d5248fd3ed10fee2eea0ee075c0
humanhash: asparagus-december-three-uniform
File name:SecuriteInfo.com.Variant.Bulz.386265.13566.10260
Download: download sample
Signature ServHelper
Create hunting rule
File size:6'347'264 bytes
First seen:2021-03-15 04:32:55 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 4035d2883e01d64f3e7a9dccb1d63af5 (47 x ServHelper, 20 x LummaStealer, 17 x Rhadamanthys)
ssdeep 49152:wUgUzXnZwyeFAwrp5Cu2dkM9JOuBnpW5EQPmdQQDWh5xzHeYOD4I6yNkqBp6Bw6w:xXnZwyst4n
Threatray 57 similar samples on MalwareBazaar
TLSH 5256E012B8D618FAC1BDE1708566A361BA313C6487323BD72F94B66A1A75FD42F3D310
Reporter SecuriteInfoCom
Tags:ServHelper

Intelligence

File Origin
# of uploads :
1
# of downloads :
931
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
SecuriteInfo.com.Variant.Bulz.386265.13566.10260
Verdict:
No threats detected
Analysis date:
2021-03-15 04:34:42 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/7ea7c6c3-44ad-486e-a460-8e24cf861fc0

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/124245/
Detection(s):
SecuriteInfo.com.Variant.Bulz.386265.13566.10260.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a UDP request
Creating a file in the system32 subdirectories
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
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:
100 / 100
Link:
https://www.joesandbox.com/analysis/639048
Signature
Adds a new user with administrator rights
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 dropped file
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: 368501 Sample: SecuriteInfo.com.Variant.Bu... Startdate: 15/03/2021 Architecture: WINDOWS Score: 100 67 Antivirus detection for dropped file 2->67 69 Multi AV Scanner detection for dropped file 2->69 71 Multi AV Scanner detection for submitted file 2->71 73 4 other signatures 2->73 10 SecuriteInfo.com.Variant.Bulz.386265.13566.exe 6 2->10         started        13 rdpdr.sys 2->13         started        process3 file4 51 SecuriteInfo.com.V...86265.13566.exe.log, ASCII 10->51 dropped 15 powershell.exe 60 10->15         started        process5 file6 53 C:\Windows\Branding\mediasvc.png, PE32+ 15->53 dropped 55 C:\Windows\Branding\mediasrv.png, PE32+ 15->55 dropped 57 C:\Users\user\AppData\...\uuogy1lo.cmdline, UTF-8 15->57 dropped 59 Uses cmd line tools excessively to alter registry or file data 15->59 61 Queries sensitive service information (via WMI, WIN32_SERVICE, often done to detect sandboxes) 15->61 63 Adds a new user with administrator rights 15->63 65 Powershell drops PE file 15->65 19 reg.exe 15->19         started        22 cmd.exe 15->22         started        24 csc.exe 15->24         started        27 9 other processes 15->27 signatures7 process8 file9 75 Creates a Windows Service pointing to an executable in C:\Windows 19->75 29 cmd.exe 22->29         started        47 C:\Users\user\AppData\Local\...\uuogy1lo.dll, PE32 24->47 dropped 31 cvtres.exe 24->31         started        49 C:\Users\user\AppData\Local\...\kjhnaclb.dll, PE32 27->49 dropped 33 cmd.exe 27->33         started        35 cvtres.exe 27->35         started        37 conhost.exe 27->37         started        39 3 other processes 27->39 signatures10 process11 process12 41 net.exe 29->41         started        43 net.exe 33->43         started        process13 45 net1.exe 41->45         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a27fa7724da938df040a3e535f2be9cec4d6d93bd4f2e5ec2ba79560f84cb69c/
Threat name:
Win64.Trojan.WinGoGoCLR
Create hunting rule
Status:
Malicious
First seen:
2021-03-13 16:28:28 UTC
AV detection:
19 of 47 (40.43%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=uj72o4snve4n6bakhzjv6k7jz3cnnwj32tzol3blu6kwb6cmw2oa._file
Verdict:
malicious
Similar samples:
106c0169d2464a9efe9ee45c1e7c5863764e6d9fca3809bb249bbb97d3cf3086
ServHelper
194b0807d3cc0922a3d218b1628cf78c8bc01ba3e03446d1cf123469ffe045e2
ServHelper
1c1cac311f126dd8a0a2b969af40fccbe62c6569fc9c1aea7ee7054f48f1d033
ServHelper
58e1370fdd747d652f4c8e0dc59188f3dfabb6dfcd3491c6fe4b81c3305d5a46
ServHelper
6f7c097945c1602bbae27e4664004cf2139e66226f54b9499df311bdab804ebb
ServHelper
71599788e1da3359b99ada8c3b84b96a9741c1f68550c09b0345d979cdc4b8a6
ServHelper
870c7c8a33ecded1784c2dab4d8027d3552f670d4138c049ad5b5ce7686b233d
ServHelper
bcc49344ddab6a3271480eafb423ee292ed4b2d32792f1b79ed72db0ad856665
ServHelper
c394b83a255961adb3ec0c8e35b21e05ee432b3c758b25ceac7e3dc3a10486a7
ServHelper
c84d7d17bace5f7ab474440491d7c3aa0be6fabbd5fab86106b10a45e4b97bfc
ServHelper
+ 47 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/210315-hg6cqey7qj/
Behaviour
Delays execution with timeout.exe
Modifies data under HKEY_USERS
Modifies registry key
Runs net.exe
Script User-Agent
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: LoadsDriver
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Drops file in Program Files directory
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:
a27fa7724da938df040a3e535f2be9cec4d6d93bd4f2e5ec2ba79560f84cb69c
MD5 hash:
2bfa2d5248fd3ed10fee2eea0ee075c0
SHA1 hash:
4541953ab415ed1b7cd7b11abb588d90b8566d03
Link:
https://www.unpac.me/results/72aa9ae2-77ca-4a59-a652-b78c507801f2/
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/a27fa7724da938df040a3e535f2be9cec4d6d93bd4f2e5ec2ba79560f84cb69c

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:Warp
Create hunting rule
Author:Seth Hardy
Description:Warp
Rule name:WarpStrings
Create hunting rule
Author:Seth Hardy
Description:Warp Identifying Strings
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 a27fa7724da938df040a3e535f2be9cec4d6d93bd4f2e5ec2ba79560f84cb69c

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/1067735/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/124245/

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