MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 efa22ab0015899c95aa6582cc90314de8d4cf2f52d3267eba50482b75d060ac5. 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: 11


Intelligence 11 IOCs YARA 11 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: efa22ab0015899c95aa6582cc90314de8d4cf2f52d3267eba50482b75d060ac5
SHA3-384 hash: e6cc67bfbbe6f23c2ef16497de0d7fa7974c350f20b7d35c275c182254e821f6acd73faab91a8193332bdb3165cef82b
SHA1 hash: dd7197b70c0fb2e6d2ebeb604f63c74ad0ac8a03
MD5 hash: ecd2137d877e8dc118703e966d54f389
humanhash: thirteen-mexico-golf-ack
File name:ecd2137d877e8dc118703e966d54f389
Download: download sample
Signature ServHelper
Create hunting rule
File size:4'802'560 bytes
First seen:2021-12-17 22:35:25 UTC
Last seen:2021-12-18 00:53:59 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash c7269d59926fa4252270f407e4dab043 (45 x Hive, 23 x ServHelper, 22 x CobaltStrike)
ssdeep 49152:ZSf8EmO8JmVHv3rb/TevO90dL3BmAFd4A64nsfJ/3TCCy3OdW1dn8uHtrAc+/0zc:MfTHvdD/k
Threatray 230 similar samples on MalwareBazaar
TLSH T1AB26DF83BC9168F9C9A9D272C9B592913731B4690B31E7C72F54A6FB2E637C01E34394
Reporter zbetcheckin
Tags:exe ServHelper

Intelligence

File Origin
# of uploads :
2
# of downloads :
984
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/214904/
Detection(s):
SecuriteInfo.com.Trojan.Packed.18626.14461.11423.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Using the Windows Management Instrumentation requests
Creating a file in the %temp% directory
DNS request
Launching a process
Creating a file
Creating a process with a hidden window
Forced system process termination
Result
Malware family:
n/a
Score:
  7/10
Tags:
n/a
Link:
https://dragonfly.certego.net/analysis/2420/overview
Behaviour
MalwareBazaar
MeasuringTime
CPUID_Instruction
EvasionQueryPerformanceCounter
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
cobalt
Link:
https://www.filescan.io/uploads/61bd10d8ec6c6c14a9de6d2d/reports/b16c23ea-1d9f-466c-84bd-bee38d2949b9/overview
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.
Malware family:
Generic Malware
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/2cf603f1-d7b7-41fd-97b2-71b61c66640b
Result
Threat name:
SERVHELPER
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/909372
Signature
.NET source code references suspicious native API functions
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 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)
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: 541850 Sample: v684REvlDV Startdate: 17/12/2021 Architecture: WINDOWS Score: 100 82 kasisausnasaysar.xyz 2->82 84 zd.map.fastly.net 2->84 86 8 other IPs or domains 2->86 88 Antivirus detection for dropped file 2->88 90 Multi AV Scanner detection for submitted file 2->90 92 .NET source code references suspicious native API functions 2->92 94 3 other signatures 2->94 11 v684REvlDV.exe 4 2->11         started        14 cmd.exe 2->14         started        16 cmd.exe 2->16         started        18 3 other processes 2->18 signatures3 process4 signatures5 106 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 11->106 108 Bypasses PowerShell execution policy 11->108 110 Queries memory information (via WMI often done to detect virtual machines) 11->110 20 powershell.exe 54 11->20         started        24 net.exe 14->24         started        26 conhost.exe 14->26         started        28 net.exe 16->28         started        30 conhost.exe 16->30         started        32 net.exe 18->32         started        34 conhost.exe 18->34         started        36 conhost.exe 18->36         started        process6 file7 78 C:\Windows\Branding\mediasvc.png, PE32+ 20->78 dropped 80 C:\Windows\Branding\mediasrv.png, PE32+ 20->80 dropped 96 Detected SERVHELPER 20->96 98 Uses cmd line tools excessively to alter registry or file data 20->98 100 Queries sensitive service information (via WMI, WIN32_SERVICE, often done to detect sandboxes) 20->100 102 2 other signatures 20->102 38 reg.exe 20->38         started        41 cmd.exe 20->41         started        43 cmd.exe 20->43         started        51 9 other processes 20->51 45 net1.exe 24->45         started        47 net1.exe 28->47         started        49 net1.exe 32->49         started        signatures8 process9 file10 104 Creates a Windows Service pointing to an executable in C:\Windows 38->104 54 cmd.exe 41->54         started        56 cmd.exe 43->56         started        74 C:\Users\user\AppData\Local\...\wgmsnz2h.dll, PE32 51->74 dropped 76 C:\Users\user\AppData\Local\...\4ee3zlcu.dll, PE32 51->76 dropped 58 cvtres.exe 51->58         started        60 cvtres.exe 51->60         started        62 conhost.exe 51->62         started        64 3 other processes 51->64 signatures11 process12 process13 66 net.exe 54->66         started        68 net.exe 56->68         started        process14 70 net1.exe 66->70         started        72 net1.exe 68->72         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/efa22ab0015899c95aa6582cc90314de8d4cf2f52d3267eba50482b75d060ac5/
Threat name:
Win64.Trojan.WinGoGoCLR
Create hunting rule
Status:
Malicious
First seen:
2021-12-06 19:49:09 UTC
File Type:
PE+ (Exe)
AV detection:
22 of 28 (78.57%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=56rcvmablcm4swvglawmsayu32guz4xvfuzgp25fasbloxigblcq._file
Verdict:
malicious
Similar samples:
043d74057370b18ec933764ae5c0fa80be90af1d41761c0a2f34f9d8c56542e5
ServHelper
046f08e500cc9156c4af47a73744ccb060606c77d7a8beb5677aa6ff4d256211
ServHelper
5911ad0a2f2f76cbe6e83b58b95ac820aee88b7fb37e017275bd3984b3b92bfa
ServHelper
723fe07654cfbf19c4cbe7b63617f3a5aaf306c11e092841397abaeff80c50c1
ServHelper
af7e2ecb8e84ad61c276347e0e766e21a043f2119dacb19ae538bddf5d0452f0
ServHelper
be9c5e5ce6d4544e6bddbd47c26873fe0c33414086824b1d4968a638184a8a7c
ServHelper
da012f669961c3631b10dd147f38ca34796c40692e01b51dd206f6a5b755e605
ServHelper
fd8f5bd06d288207635503abf28da66ec823359d18c6f887750831035d51e9d6
ServHelper
ff257a7b22badf7948f21dd5dfaf008dd72895aa63bc6a1c5838cbe26036bbe7
ServHelper
+ 220 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  10/10
Tags:
persistence upx
Link:
https://tria.ge/reports/211217-2h9hwsecc3/
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
Loads dropped DLL
Blocklisted process makes network request
Modifies RDP port number used by Windows
Sets DLL path for service in the registry
UPX packed file
Grants admin privileges
Malware Config
Dropper Extraction:
https://raw.githubusercontent.com/sqlitey/sqlite/master/speed.ps1
Unpacked files
SH256 hash:
efa22ab0015899c95aa6582cc90314de8d4cf2f52d3267eba50482b75d060ac5
MD5 hash:
ecd2137d877e8dc118703e966d54f389
SHA1 hash:
dd7197b70c0fb2e6d2ebeb604f63c74ad0ac8a03
Link:
https://www.unpac.me/results/36143ba2-9f58-4ff7-ae98-d4a6eac3eaaa/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/efa22ab00158/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.86
Link:
https://yomi.yoroi.company/submissions/efa22ab0015899c95aa6582cc90314de8d4cf2f52d3267eba50482b75d060ac5

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:BitcoinAddress
Create hunting rule
Author:Didier Stevens (@DidierStevens)
Description:Contains a valid Bitcoin address
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:identity_golang
Create hunting rule
Author:Eric Yocam
Description:find Golang malware
Rule name:INDICATOR_SUSPICIOUS_EXE_Embedded_Gzip_B64Encoded_File
Create hunting rule
Author:ditekSHen
Description:Detects executables containing bas64 encoded gzip files
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:methodology_golang_build_strings
Create hunting rule
Author:smiller
Description:Looks for PEs with a Golang build ID
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 efa22ab0015899c95aa6582cc90314de8d4cf2f52d3267eba50482b75d060ac5

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/1894471/
Cape
Cape
https://www.capesandbox.com/analysis/214904/

Comments


Avatar
zbet commented on 2021-12-17 22:35:27 UTC

url : hxxp://103.253.43.214/ds1/fd4/df3.exe