MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 91d8870ce872fc1d99181a961e4b3735152e7aa77b714b015efd594fd923eea2. 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: 8


Intelligence 8 IOCs YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 91d8870ce872fc1d99181a961e4b3735152e7aa77b714b015efd594fd923eea2
SHA3-384 hash: e3cc9dc6fbc4fc62af51dc03619a54c3ff3ff5b25c43469edfa2836f6ecd67c930ad6b6e80a3f68851f7bb46477bfe52
SHA1 hash: ddecd8b6ddf3a60d841663ab58fdcfea02299d09
MD5 hash: 4c1063d9a1324655008a22a6d558b2dc
humanhash: river-harry-oranges-alaska
File name:4c1063d9a1324655008a22a6d558b2dc.exe
Download: download sample
Signature ServHelper
Create hunting rule
File size:3'252'736 bytes
First seen:2021-07-12 09:05:58 UTC
Last seen:2021-07-12 09:59:02 UTC
File type:Executable exe
MIME type:application/x-dosexec
ssdeep 98304:4qqWwSAOoEkonXzAz40WnCEgvpcj8IEpGk9:4qTJB3koXzJ0WQxe8I0N9
Threatray 167 similar samples on MalwareBazaar
TLSH T133E523593A4071CFD81BC8B5DE942D65DAA435378707E283A00712EEFA2E9A3DF051E7
Reporter abuse_ch
Tags:exe ServHelper

Intelligence

File Origin
# of uploads :
2
# of downloads :
1'345
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
4c1063d9a1324655008a22a6d558b2dc.exe
Verdict:
No threats detected
Analysis date:
2021-07-12 09:26:03 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/16b38daa-3661-4a9d-8ac0-539b1ccecb24

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/171016/
Detection(s):
SecuriteInfo.com.Trojan.Inject4.13954.25799.23332.UNOFFICIAL
Create hunting rule

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.
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/7dc912d7-ef25-4152-9415-9d87181e3120
Result
Threat name:
Unknown
Detection:
malicious
Classification:
evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/814674
Signature
Allocates memory in foreign processes
Antivirus detection for dropped file
Bypasses PowerShell execution policy
Creates a Windows Service pointing to an executable in C:\Windows
Injects a PE file into a foreign processes
Modifies the context of a thread in another process (thread injection)
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: Suspicious Csc.exe Source File Folder
Uses cmd line tools excessively to alter registry or file data
Writes to foreign memory regions
Yara detected AntiVM3
Yara detected Costura Assembly Loader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 447084 Sample: X312jMOo84.exe Startdate: 12/07/2021 Architecture: WINDOWS Score: 100 64 Antivirus detection for dropped file 2->64 66 Multi AV Scanner detection for dropped file 2->66 68 Multi AV Scanner detection for submitted file 2->68 70 3 other signatures 2->70 11 X312jMOo84.exe 3 2->11         started        15 rdpdr.sys 2->15         started        process3 file4 58 C:\Users\user\AppData\...\X312jMOo84.exe.log, ASCII 11->58 dropped 80 Writes to foreign memory regions 11->80 82 Allocates memory in foreign processes 11->82 84 Modifies the context of a thread in another process (thread injection) 11->84 86 Injects a PE file into a foreign processes 11->86 17 vbc.exe 4 11->17         started        signatures5 process6 signatures7 62 Bypasses PowerShell execution policy 17->62 20 powershell.exe 47 17->20         started        process8 file9 52 C:\Windows\Branding\mediasvc.png, PE32+ 20->52 dropped 54 C:\Windows\Branding\mediasrv.png, PE32+ 20->54 dropped 56 C:\Users\user\AppData\...\axo3prvk.cmdline, UTF-8 20->56 dropped 72 Uses cmd line tools excessively to alter registry or file data 20->72 74 Queries sensitive service information (via WMI, WIN32_SERVICE, often done to detect sandboxes) 20->74 76 Powershell drops PE file 20->76 24 reg.exe 20->24         started        27 cmd.exe 20->27         started        29 csc.exe 20->29         started        32 8 other processes 20->32 signatures10 process11 file12 78 Creates a Windows Service pointing to an executable in C:\Windows 24->78 34 cmd.exe 27->34         started        60 C:\Users\user\AppData\Local\...\axo3prvk.dll, PE32 29->60 dropped 36 cvtres.exe 29->36         started        38 cmd.exe 32->38         started        40 conhost.exe 32->40         started        42 conhost.exe 32->42         started        44 2 other processes 32->44 signatures13 process14 process15 46 net.exe 34->46         started        48 net.exe 38->48         started        process16 50 net1.exe 46->50         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/91d8870ce872fc1d99181a961e4b3735152e7aa77b714b015efd594fd923eea2/
Threat name:
ByteCode-MSIL.Packed.Generic
Create hunting rule
Status:
Suspicious
First seen:
2021-07-10 12:41:51 UTC
AV detection:
18 of 28 (64.29%)
Threat level:
  1/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=shmiodhiol6b3giydklb4szxguks46vhpnyuwak67vmu7wjd52ra._file
Verdict:
malicious
Similar samples:
1555f744c779e3ce93f92b454ad2092e136622c39c21eca20125dd79cdf8fb94
ServHelper
15e71d5e4b29bbf6f1e97bb6ff2cfdb199fb040746d57443163a5c8fecd745aa
ServHelper
2142824c415eb4f05facc471942840e5065aa41b322f36dac198d30d00e8b6fc
ServHelper
4d7bb45f219aaebc5c2745b60879b954a56b58a3f16c5e5c3252143c9b7a3a47
ServHelper
7dc721c6b633d783562f73d629267da7a16a77b4dae9ab280250c116bdfec591
ServHelper
b3f483f00e80c0777858e6795f9f13bce726ff8265ef3e8cd3602cf1711247a2
ServHelper
d9ec3c5cf92b5b3aa1d59949cf1eafb9c695d35ce9872215ba8b189d40c66823
ServHelper
eb02c967fb3feaf5504a78de8a7e0513c2c4e52ddf2243bfbcb10e83954baaad
ServHelper
fe40b63a00a7d737baa87f493751a1b92ac782baaef2304b0ae65c5a1cbec58d
ServHelper
+ 157 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/210712-b2t1jccad6/
Behaviour
Runs net.exe
Script User-Agent
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: LoadsDriver
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Modifies data under HKEY_USERS
Modifies registry key
Drops file in Program Files directory
Drops file in Windows directory
Drops file in System32 directory
Suspicious use of SetThreadContext
Deletes itself
Loads dropped DLL
Modifies file permissions
Uses the VBS compiler for execution
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
Core1 .NET packer
Grants admin privileges
ServHelper
Malware Config
Dropper Extraction:
https://raw.githubusercontent.com/sqlitey/sqlite/master/speed.ps1
Unpacked files
SH256 hash:
91d8870ce872fc1d99181a961e4b3735152e7aa77b714b015efd594fd923eea2
MD5 hash:
4c1063d9a1324655008a22a6d558b2dc
SHA1 hash:
ddecd8b6ddf3a60d841663ab58fdcfea02299d09
Link:
https://www.unpac.me/results/7f98faff-f840-470d-9d88-691c3ddc1665/
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/91d8870ce872fc1d99181a961e4b3735152e7aa77b714b015efd594fd923eea2

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:golang
Create hunting rule
Rule name:INDICATOR_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFuture
Create hunting rule
Author:ditekSHen
Description:Detect executables with stomped PE compilation timestamp that is greater than local current time
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

File information

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

Web download

ServHelper

Executable exe 91d8870ce872fc1d99181a961e4b3735152e7aa77b714b015efd594fd923eea2

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/1436477/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/171016/

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