MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 bac78c78e97c8458437ffcbb31b4a54a141200a8cb656eac2dcab06691bc4a91. 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 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: bac78c78e97c8458437ffcbb31b4a54a141200a8cb656eac2dcab06691bc4a91
SHA3-384 hash: eb863ab7f3d6254f44bba26ac650566e2960fcd6081ae42cdaf9e2c8d649e0f762bd3ee7ca7b7a188c071eaf0c0c72e0
SHA1 hash: 06eaa06157708dafca73f249d8c3a80d7900b263
MD5 hash: 40b3325147109383781f2fab6c3f132f
humanhash: saturn-bakerloo-seven-sink
File name:40b3325147109383781f2fab6c3f132f.exe
Download: download sample
Signature ServHelper
Create hunting rule
File size:6'342'144 bytes
First seen:2021-03-31 07:25:18 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:igAHX/6NA+ITa35t7+IcgUJXjmOPdVfwNx+EAUA6DW4YvmGjpaosuNcK3xwXffoU:+X/6NA+awI
Threatray 83 similar samples on MalwareBazaar
TLSH 3756F012BCD204FAC57EE170865293A176713C6487323BD72E85B6AA1AB5FD42F3E314
Reporter abuse_ch
Tags:exe ServHelper


Avatar
abuse_ch
ServHelper C2:
https://jfiisnvvz.xyz/

Intelligence

File Origin
# of uploads :
1
# of downloads :
1'662
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
40b3325147109383781f2fab6c3f132f.exe
Verdict:
No threats detected
Analysis date:
2021-03-31 08:01:56 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/d6298cc3-72e1-4219-8b43-55d3496cca7a

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/129198/
Detection(s):
Win.Malware.Bulz-9847817-0
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
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:
80 / 100
Link:
https://www.joesandbox.com/analysis/659846
Signature
Antivirus detection for dropped file
Bypasses PowerShell execution policy
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
Yara detected Costura Assembly Loader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 378852 Sample: riWsVSSg86.exe Startdate: 31/03/2021 Architecture: WINDOWS Score: 80 44 Antivirus detection for dropped file 2->44 46 Multi AV Scanner detection for submitted file 2->46 48 Sigma detected: Dot net compiler compiles file from suspicious location 2->48 50 Yara detected Costura Assembly Loader 2->50 8 riWsVSSg86.exe 5 2->8         started        process3 signatures4 52 Bypasses PowerShell execution policy 8->52 11 powershell.exe 51 8->11         started        process5 file6 34 C:\Windows\Branding\mediasvc.png, PE32+ 11->34 dropped 36 C:\Windows\Branding\mediasrv.png, PE32+ 11->36 dropped 38 C:\Users\user\AppData\...\cswem5o0.cmdline, UTF-8 11->38 dropped 54 Queries sensitive service information (via WMI, WIN32_SERVICE, often done to detect sandboxes) 11->54 56 Powershell drops PE file 11->56 15 csc.exe 11->15         started        18 csc.exe 11->18         started        20 powershell.exe 11->20         started        22 4 other processes 11->22 signatures7 process8 file9 40 C:\Users\user\AppData\Local\...\cswem5o0.dll, PE32 15->40 dropped 24 cvtres.exe 15->24         started        42 C:\Users\user\AppData\Local\...\b10ohdej.dll, PE32 18->42 dropped 26 cvtres.exe 18->26         started        28 conhost.exe 20->28         started        30 conhost.exe 22->30         started        32 conhost.exe 22->32         started        process10
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/bac78c78e97c8458437ffcbb31b4a54a141200a8cb656eac2dcab06691bc4a91/
Threat name:
Win64.Trojan.WinGoGoCLR
Create hunting rule
Status:
Malicious
First seen:
2021-03-31 06:58:35 UTC
AV detection:
19 of 45 (42.22%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=xldyy6hjpscfqq377s5tdnffjikbeafiznsw5lbnzkygnen4jkiq._file
Verdict:
malicious
Similar samples:
106c0169d2464a9efe9ee45c1e7c5863764e6d9fca3809bb249bbb97d3cf3086
ServHelper
1780d38ef73129177134042720cfc526fe012760f406e9e030d8d5fbbdfb7828
ServHelper
1c1cac311f126dd8a0a2b969af40fccbe62c6569fc9c1aea7ee7054f48f1d033
ServHelper
4411d8a69230284cb6238a2e8cf29878afbbef90935bb94d1a6f8d59af30c6cc
ServHelper
499e3672259c28f6bd35d790c2ec4f52835cfcd46c8ddf279df4b02d4d07d7e5
ServHelper
5090fa74f83368086c1d197dcd28e51f8b36cd5d2c18e9a964d925a445ea0066
ServHelper
706a3b4438e7b883d8c3cd66ffabfbb3e3495b3b7c6f9b48adf7a5c8cdd0c3c1
ServHelper
a27fa7724da938df040a3e535f2be9cec4d6d93bd4f2e5ec2ba79560f84cb69c
ServHelper
c394b83a255961adb3ec0c8e35b21e05ee432b3c758b25ceac7e3dc3a10486a7
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-qbgqcq77r6/
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:
bac78c78e97c8458437ffcbb31b4a54a141200a8cb656eac2dcab06691bc4a91
MD5 hash:
40b3325147109383781f2fab6c3f132f
SHA1 hash:
06eaa06157708dafca73f249d8c3a80d7900b263
Link:
https://www.unpac.me/results/98e7b202-3fcc-42eb-bace-b5296300f4b3/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Eldorado
Score:
0.90
Link:
https://yomi.yoroi.company/submissions/bac78c78e97c8458437ffcbb31b4a54a141200a8cb656eac2dcab06691bc4a91

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: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 bac78c78e97c8458437ffcbb31b4a54a141200a8cb656eac2dcab06691bc4a91

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/1011491/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/129198/
  
URLhaus
https://urlhaus.abuse.ch/url/1083192/

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