MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 d7ef71aa67e1fb5a364c97ff4b89f5f6a28db1c84f91563547a4e44581833486. 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: 7


Intelligence 7 IOCs YARA 7 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: d7ef71aa67e1fb5a364c97ff4b89f5f6a28db1c84f91563547a4e44581833486
SHA3-384 hash: 918851196166f72d634894bafd24964faa80a17380f0fdfcc4a3f7d741ccaa948e9f7df2c8cace085dba280e2c4092df
SHA1 hash: 2ba0e479d5c2b7b9b28c7f946bd56489cedaa126
MD5 hash: 83d119a963e7050995f9bf6be8841b95
humanhash: shade-stairway-venus-west
File name:83d119a963e7050995f9bf6be8841b95
Download: download sample
Signature ServHelper
Create hunting rule
File size:6'024'704 bytes
First seen:2021-09-24 21:42:09 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash c7269d59926fa4252270f407e4dab043 (45 x Hive, 23 x ServHelper, 22 x CobaltStrike)
ssdeep 49152:OZxqAErb/T/vO90dL3BmAFd4A64nsfJ49fEM5QcLTmk/2PU3oq5Z/tXGKSXzDBme:OZZ0hEumAQQQQQQQQQQQQQ
Threatray 41 similar samples on MalwareBazaar
TLSH T1C756F103BC9064B9C9AAD2328DB592A13771B859073177C32F54A6BB2FB77C01E79364
Reporter zbetcheckin
Tags:exe ServHelper

Intelligence

File Origin
# of uploads :
1
# of downloads :
1'197
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
83d119a963e7050995f9bf6be8841b95
Verdict:
No threats detected
Analysis date:
2021-09-24 21:43:45 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/73a0c2b3-ffae-4d48-ab63-de98ec14e037

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/191291/
Detection(s):
Win.Malware.Bulz-9847817-0
Create hunting rule

Malware family:
Generic Malware
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/8894aae7-af0b-4515-8e6d-f196e6d0db55
Result
Threat name:
SERVHELPER
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/857674
Signature
Adds a new user with administrator rights
Antivirus detection for dropped file
Bypasses PowerShell execution policy
Contains functionality to start a terminal service
Creates a Windows Service pointing to an executable in C:\Windows
Detected SERVHELPER
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Performs DNS queries to domains with low reputation
Powershell drops PE file
Queries memory information (via WMI often done to detect virtual machines)
Queries sensitive service information (via WMI, WIN32_SERVICE, often done to detect sandboxes)
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Sigma detected: Hurricane Panda Activity
Sigma detected: Suspicious Csc.exe Source File Folder
Sigma detected: Suspicious PowerShell Invocations - Specific
Sigma detected: Suspicious Script Execution From Temp Folder
Uses cmd line tools excessively to alter registry or file data
Yara detected Costura Assembly Loader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 490105 Sample: 1xAO2Lh53a Startdate: 24/09/2021 Architecture: WINDOWS Score: 100 77 sasdmvica883fen.xyz 2->77 79 sacmmvivuasd.xyz 2->79 81 10 other IPs or domains 2->81 85 Antivirus detection for dropped file 2->85 87 Multi AV Scanner detection for dropped file 2->87 89 Multi AV Scanner detection for submitted file 2->89 91 7 other signatures 2->91 11 1xAO2Lh53a.exe 4 2->11         started        14 cmd.exe 2->14         started        16 cmd.exe 2->16         started        18 2 other processes 2->18 signatures3 process4 signatures5 103 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 11->103 105 Bypasses PowerShell execution policy 11->105 107 Queries memory information (via WMI often done to detect virtual machines) 11->107 20 powershell.exe 67 11->20         started        25 net.exe 14->25         started        27 conhost.exe 14->27         started        29 net.exe 16->29         started        31 conhost.exe 16->31         started        33 conhost.exe 18->33         started        process6 dnsIp7 83 asbza.cn 206.188.197.227, 49840, 80 DEFENSE-NETUS United States 20->83 69 C:\Windows\Branding\mediasvc.png, PE32+ 20->69 dropped 71 C:\Windows\Branding\mediasrv.png, PE32+ 20->71 dropped 73 C:\Users\user\AppData\...\ensndgma.cmdline, UTF-8 20->73 dropped 95 Detected SERVHELPER 20->95 97 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 20->97 99 Uses cmd line tools excessively to alter registry or file data 20->99 101 3 other signatures 20->101 35 reg.exe 20->35         started        38 cmd.exe 20->38         started        40 cmd.exe 20->40         started        46 8 other processes 20->46 42 net1.exe 25->42         started        44 net1.exe 29->44         started        file8 signatures9 process10 file11 93 Creates a Windows Service pointing to an executable in C:\Windows 35->93 49 cmd.exe 38->49         started        51 cmd.exe 40->51         started        75 C:\Users\user\AppData\Local\...\ensndgma.dll, PE32 46->75 dropped 53 cvtres.exe 46->53         started        55 conhost.exe 46->55         started        57 conhost.exe 46->57         started        59 2 other processes 46->59 signatures12 process13 process14 61 net.exe 49->61         started        63 net.exe 51->63         started        process15 65 net1.exe 61->65         started        67 net1.exe 63->67         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/d7ef71aa67e1fb5a364c97ff4b89f5f6a28db1c84f91563547a4e44581833486/
Threat name:
Win64.Trojan.Sabsik
Create hunting rule
Status:
Malicious
First seen:
2021-09-23 13:29:48 UTC
AV detection:
20 of 45 (44.44%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=27xxdkth4h5vunsms77uxcpv62ri3moij6ivmnkhutselamdgsda._file
Verdict:
malicious
Similar samples:
255141a430ed2bbda653b5ab18acdd8dcca5a39cf8c2d1fa938445e31ecf38e5
ServHelper
3f4af8c0a06563d9f4d959d5065c02b83140c0fea19924dbd39984087ace54f8
ServHelper
5911ad0a2f2f76cbe6e83b58b95ac820aee88b7fb37e017275bd3984b3b92bfa
ServHelper
870c7c8a33ecded1784c2dab4d8027d3552f670d4138c049ad5b5ce7686b233d
ServHelper
88fcc7a3828eb28655cc8f5996036e7bec372459895c133c5ab76294270789e0
ServHelper
ae1c9d454905ed43654f99b1ea1e8ecc3ae08eb75c3860f46b285ce724ae5e4d
ServHelper
af7e2ecb8e84ad61c276347e0e766e21a043f2119dacb19ae538bddf5d0452f0
ServHelper
b3748a0976c91a7310d0d38d42c91b1d7ba37364d58c5bed902cc6641d31cadc
ServHelper
f60f32ec899bcb92fd50491a8c32f0548afbd4dc02462dfa373d484b4b161a86
ServHelper
ff257a7b22badf7948f21dd5dfaf008dd72895aa63bc6a1c5838cbe26036bbe7
ServHelper
+ 31 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/210924-1kw5xaaabj/
Behaviour
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:
d7ef71aa67e1fb5a364c97ff4b89f5f6a28db1c84f91563547a4e44581833486
MD5 hash:
83d119a963e7050995f9bf6be8841b95
SHA1 hash:
2ba0e479d5c2b7b9b28c7f946bd56489cedaa126
Link:
https://www.unpac.me/results/6969d05f-4770-4228-8e9e-ed610a6629be/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/d7ef71aa67e1/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.30
Link:
https://yomi.yoroi.company/submissions/d7ef71aa67e1fb5a364c97ff4b89f5f6a28db1c84f91563547a4e44581833486

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:GoBinTest
Create hunting rule
Rule name:GoBinTest
Create hunting rule
Rule name:golang
Create hunting rule
Rule name:golang
Create hunting rule
Rule name:INDICATOR_TOOL_GoCLR
Create hunting rule
Author:ditekSHen
Description:Detects binaries utilizing Go-CLR for hosting the CLR in a Go process and using it to execute a DLL from disk or an assembly from memory
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 d7ef71aa67e1fb5a364c97ff4b89f5f6a28db1c84f91563547a4e44581833486

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/1642902/
Cape
Cape
https://www.capesandbox.com/analysis/191291/

Comments


Avatar
zbet commented on 2021-09-24 21:42:10 UTC

url : hxxp://2.56.59.42/US/clr.exe