MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ea51791b2c1509da6faf661c4a7408773d8852e999dd5a97ff972685ee132cac. 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


AveMariaRAT


Vendor detections: 11


Maldoc score: 7


Intelligence 11 IOCs YARA 21 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: ea51791b2c1509da6faf661c4a7408773d8852e999dd5a97ff972685ee132cac
SHA3-384 hash: 8b6f2e501f167d3a946ce73384ad45e1e942cb61817118185cd2adb979748139b168f85d709dedba3dddba671d0ed236
SHA1 hash: b1060e2537677bf96cd48527f59a3ca7711b7606
MD5 hash: 9ecf3d1976c10309395671f120af5270
humanhash: diet-xray-may-queen
File name:PO99876.xls
Download: download sample
Signature AveMariaRAT
Create hunting rule
File size:135'168 bytes
First seen:2020-12-15 07:31:11 UTC
Last seen:2020-12-15 09:47:39 UTC
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 3072:+rk3hbdlylKsgqopeJBWhZFGkE+cL2NdAsioo1gaSNAPZ1sWFPO7YiR6PJEcjjaj:6k3hbdlylKsgqopeJBWhZFVE+W2NdAsj
TLSH 7ED3AD427263C416DE5E93392DE6828B6313BC214E7F0377B764F71DAA7B9A44D0260B
Reporter abuse_ch
Tags:AveMariaRAT nVpn RAT xls


Avatar
abuse_ch
Malspam distributing AveMariaRAT:

HELO: box.kymfers.xyz
Sending IP: 138.197.174.206
From: Rani Lee<mail@kymfers.xyz>
Reply-To: <debbiejusttoptw@gmail.com>
Subject: Re: New P.O. 070814-03
Attachment: PO99876.xls

AveMariaRAT payload URL:
http://iptv16.com/wp-includes/ID3/D/TSmubQce8cTcckK.exe

AveMariaRAT C2:
bu250653.hopto.org (194.5.97.3)

Pointing to nVpn:

% Information related to '194.5.97.0 - 194.5.97.255'

% Abuse contact for '194.5.97.0 - 194.5.97.255' is 'abuse@privacyfirst.sh'

inetnum: 194.5.97.0 - 194.5.97.255
remarks: This prefix is assigned to The PRIVACYFIRST Project, which
remarks: operates infrastructure jointly used by various VPN service
remarks: providers. We have a very strong focus on privacy and freedom.
remarks: In case of abuse, we encourage all international law enforcement
remarks: agencies to get in touch with our abuse contact. Due to the fact
remarks: that we keep no logs of user activities and only share data when
remarks: it is legally required under our jurisdiction, it is very unlikely
remarks: for a demand of user information to be successful. Still, that
remarks: should not deter you from reaching out.
netname: PRIVACYFIRST-UK5
country: GB
admin-c: TPP15-RIPE
tech-c: TPP15-RIPE
org: ORG-TPP6-RIPE
mnt-by: PRIVACYFIRST-MNT
status: SUB-ALLOCATED PA
created: 2018-07-23T09:31:45Z
last-modified: 2020-08-26T17:48:55Z
source: RIPE

Office OLE Information

This malware samples appears to be an Office document. The following table provides more information about this document using oletools and oledump.

OLE id
Maldoc score: 7
Application name is Microsoft Excel
Office document is in OLE format
Office document contains VBA Macros
OLE dump

MalwareBazaar was able to identify 11 sections in this file using oledump:

Section IDSection sizeSection name
1107 bytesCompObj
2244 bytesDocumentSummaryInformation
3216 bytesSummaryInformation
4122656 bytesWorkbook
5547 bytes_VBA_PROJECT_CUR/PROJECT
686 bytes_VBA_PROJECT_CUR/PROJECTwm
7991 bytes_VBA_PROJECT_CUR/VBA/Feuil1
8681 bytes_VBA_PROJECT_CUR/VBA/Module1
91027 bytes_VBA_PROJECT_CUR/VBA/ThisWorkbook
102516 bytes_VBA_PROJECT_CUR/VBA/_VBA_PROJECT
11562 bytes_VBA_PROJECT_CUR/VBA/dir
OLE vba

MalwareBazaar was able to extract and deobfuscate VBA script(s) the following information from OLE objects embedded in this file using olevba:

TypeKeywordDescription
AutoExecAuto_OpenRuns when the Excel Workbook is opened
SuspiciousFORMULA.FILLMay modify Excel 4 Macro formulas at runtime
SuspiciousEXECMay run an executable file or a system
SuspiciousHex StringsHex-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)

Intelligence

File Origin
# of uploads :
2
# of downloads :
218
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
ea51791b2c1509da6faf661c4a7408773d8852e999dd5a97ff972685ee132cac.xls
Verdict:
Malicious activity
Analysis date:
2020-12-15 01:26:00 UTC
Tags:
macros trojan
Link:
https://app.any.run/tasks/6929b330-960f-4a3b-b30d-86a49411926f

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
File type:
application/vnd.ms-excel
Has a screenshot:
False
Contains macros:
True
Detection(s):
TwinWave.EvilDoc.DOCXRSTRGOOD.NEW-OBJECT.201125.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.SUPExcel4MacroVines.20201208.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.DOCXRSTRGOOD.POWERSHELL.201125.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a process with a hidden window
Creating a file
Replacing files
DNS request
Sending a custom TCP request
Sending an HTTP GET request
Moving a file to the %AppData% directory
Creating a process from a recently created file
Launching a process
Launching a process by exploiting the app vulnerability
Deleting of the original file
Result
Verdict:
Malicious
File Type:
Legacy Excel File with Macro
Link:
https://app.docguard.net/ea51791b2c1509da6faf661c4a7408773d8852e999dd5a97ff972685ee132cac/results/dashboard
Document image
Image:
Download PNG
Document image
Result
Verdict:
MALICIOUS
Details
Macro Execution Coercion
Detected a document that appears to social engineer the user into activating embedded logic.
Autostarting Excel Macro Sheet
Excel contains Macrosheet logic that will trigger automatically upon document open.
Document With Minimal Content
Document contains less than 1 kilobyte of semantic information.
Result
Threat name:
Hidden Macro 4.0 AveMaria
Create hunting rule
Detection:
malicious
Classification:
phis.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/563138
Signature
Allocates memory in foreign processes
Antivirus detection for URL or domain
Binary contains a suspicious time stamp
Bypasses PowerShell execution policy
Connects to a URL shortener service
Contains functionality to hide user accounts
Contains functionality to inject threads in other processes
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal e-mail passwords
Creates a thread in another existing process (thread injection)
Document exploit detected (process start blacklist hit)
Drops PE files to the document folder of the user
Found Excel 4.0 Macro with suspicious formulas
Found obfuscated Excel 4.0 Macro
Hides that the sample has been downloaded from the Internet (zone.identifier)
Increases the number of concurrent connection per server for Internet Explorer
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Obfuscated command line found
Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)
Powershell drops PE file
Sigma detected: Microsoft Office Product Spawning Windows Shell
Sigma detected: Scheduled temp file as task from temp location
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
Uses schtasks.exe or at.exe to add and modify task schedules
Writes to foreign memory regions
Yara detected AntiVM_3
Yara detected AveMaria stealer
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 330674 Sample: PO99876.xls Startdate: 15/12/2020 Architecture: WINDOWS Score: 100 59 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->59 61 Malicious sample detected (through community Yara rule) 2->61 63 Antivirus detection for URL or domain 2->63 65 16 other signatures 2->65 9 EXCEL.EXE 107 30 2->9         started        12 gw.exe 1 2 2->12         started        process3 signatures4 71 Obfuscated command line found 9->71 73 Document exploit detected (process start blacklist hit) 9->73 14 powershell.exe 7 9->14         started        16 powershell.exe 16 7 9->16         started        21 powershell.exe 7 9->21         started        75 Injects a PE file into a foreign processes 12->75 23 gw.exe 1 12->23         started        25 schtasks.exe 12->25         started        process5 dnsIp6 27 gw.exe 2 8 14->27         started        45 iptv16.com 103.66.216.30, 49168, 80 CLOUDIE-AS-APCloudieLimitedHK China 16->45 47 tinyurl.com 104.20.139.65, 443, 49167 CLOUDFLARENETUS United States 16->47 39 C:\Users\user\Documents\gw.exe, PE32 16->39 dropped 67 Drops PE files to the document folder of the user 16->67 69 Powershell drops PE file 16->69 file7 signatures8 process9 file10 41 C:\Users\user\AppData\Roaming\IQLwsQ.exe, PE32 27->41 dropped 43 C:\Users\user\AppData\Local\...\tmp190E.tmp, XML 27->43 dropped 77 Contains functionality to inject threads in other processes 27->77 79 Contains functionality to steal Chrome passwords or cookies 27->79 81 Contains functionality to steal e-mail passwords 27->81 83 Injects a PE file into a foreign processes 27->83 31 gw.exe 4 2 27->31         started        35 schtasks.exe 27->35         started        signatures11 process12 dnsIp13 49 bu250653.hopto.org 23.83.185.40, 1414 LEASEWEB-USA-PHX-11US United States 31->49 51 Writes to foreign memory regions 31->51 53 Allocates memory in foreign processes 31->53 55 Increases the number of concurrent connection per server for Internet Explorer 31->55 57 2 other signatures 31->57 37 cmd.exe 31->37         started        signatures14 process15
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/ea51791b2c1509da6faf661c4a7408773d8852e999dd5a97ff972685ee132cac/
Threat name:
Document-Word.Trojan.Heuristic
Create hunting rule
Status:
Malicious
First seen:
2020-12-15 00:11:43 UTC
AV detection:
14 of 28 (50.00%)
Threat level:
  2/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=5jixsgzmcue5u35pmyoeu5aio46yquxjthovvf77s4til3qtfswa._file
Result
Malware family:
warzonerat
Create hunting rule
Score:
  10/10
Tags:
family:warzonerat infostealer macro persistence rat
Link:
https://tria.ge/reports/201215-qyndd63cw6/
Behaviour
Enumerates system info in registry
Modifies Internet Explorer settings
Suspicious behavior: AddClipboardFormatListener
Suspicious use of SetWindowsHookEx
Checks processor information in registry
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: RenamesItself
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Adds Run key to start application
Deletes itself
Blocklisted process makes network request
Executes dropped EXE
ServiceHost packer
Warzone RAT Payload
Process spawned unexpected child process
WarzoneRat, AveMaria
Malware Config
Dropper Extraction:
https://tinyurl.com/yapo8pxs
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
DriveBy Activity
Score:
0.90
Link:
https://yomi.yoroi.company/submissions/ea51791b2c1509da6faf661c4a7408773d8852e999dd5a97ff972685ee132cac

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:AveMaria
Create hunting rule
Author:@bartblaze
Description:Identifies AveMaria aka WarZone RAT.
Rule name:AveMaria_WarZone
Create hunting rule
Rule name:ave_maria_warzone_rat
Create hunting rule
Author:jeFF0Falltrades
Rule name:Chrome_stealer_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Chrome in files like avemaria
Rule name:Cobalt_functions
Create hunting rule
Author:@j0sm1
Description:Detect functions coded with ROR edi,D; Detect CobaltStrike used by differents groups APT
Rule name:Codoso_Gh0st_1
Create hunting rule
Author:Florian Roth
Description:Detects Codoso APT Gh0st Malware
Reference:https://www.proofpoint.com/us/exploring-bergard-old-malware-new-tricks
Rule name:Codoso_Gh0st_2
Create hunting rule
Author:Florian Roth
Description:Detects Codoso APT Gh0st Malware
Reference:https://www.proofpoint.com/us/exploring-bergard-old-malware-new-tricks
Rule name:Email_stealer_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Email in files like avemaria
Rule name:Excel_Hidden_Macro_Sheet
Create hunting rule
Rule name:INDICATOR_SUSPICIOUS_Binary_References_Browsers
Create hunting rule
Author:ditekSHen
Description:Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.
Rule name:IPPort_combo_mem
Create hunting rule
Author:James_inthe_box
Description:IP and port combo
Rule name:MALWARE_Win_AveMaria
Create hunting rule
Author:ditekshen
Description:AveMaria variant payload
Rule name:MAL_Envrial_Jan18_1
Create hunting rule
Author:Florian Roth
Description:Detects Encrial credential stealer malware
Reference:https://twitter.com/malwrhunterteam/status/953313514629853184
Rule name:Ping_Del_method_bin_mem
Create hunting rule
Author:James_inthe_box
Description:cmd ping IP nul del
Rule name:RDPWrap
Create hunting rule
Author:@bartblaze
Description:Identifies RDP Wrapper, sometimes used by attackers to maintain persistence.
Reference:https://github.com/stascorp/rdpwrap
Rule name:Select_from_enumeration
Create hunting rule
Author:James_inthe_box
Description:IP and port combo
Rule name:SharedStrings
Create hunting rule
Author:Katie Kleemola
Description:Internal names found in LURK0/CCTV0 samples
Rule name:Stealer_word_in_memory
Create hunting rule
Author:James_inthe_box
Description:The actual word stealer in memory
Rule name:SUSP_Excel4Macro_AutoOpen
Create hunting rule
Author:John Lambert @JohnLaTwC
Description:Detects Excel4 macro use with auto open / close
Rule name:UAC_bypass_bin_mem
Create hunting rule
Author:James_inthe_box
Description:UAC bypass in files like avemaria
Rule name:win_ave_maria_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.

Malspam

AveMariaRAT

Excel file xls ea51791b2c1509da6faf661c4a7408773d8852e999dd5a97ff972685ee132cac

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/919881/
  
Delivery method
Distributed via e-mail attachment

Comments