MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b3c1d51c200dbbeea2ebeacdce3cb1b70fec80bdf8042f177cd152cbe595677a. 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: 15


Maldoc score: 7


Intelligence 15 IOCs YARA 11 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b3c1d51c200dbbeea2ebeacdce3cb1b70fec80bdf8042f177cd152cbe595677a
SHA3-384 hash: 14ecc12136463db0593fb05ee0f4462f8d9d09aa269cdad92b5100165e9f04e40da49e81d2e777669334fa43f2dfacdb
SHA1 hash: 3c182df9984f9636ff1e6f799e679542da72e648
MD5 hash: bd510e656df192f3d66e618420c28541
humanhash: seventeen-nevada-bravo-happy
File name:documento.doc
Download: download sample
Signature AveMariaRAT
Create hunting rule
File size:195'584 bytes
First seen:2023-09-07 16:01:08 UTC
Last seen:Never
File type:Word file doc
MIME type:application/msword
ssdeep 3072:TbiyWTxSoVHpNY6nemhInf/va46YP6z+d:fiyWTwoVHp6m0/yl6H
TLSH T13B140227B3A4C911F44183B498CBC5567B32FC64AE11AA8B67467F8FFD752709E0270A
TrID 52.6% (.DOC) Microsoft Word document (30000/1/2)
33.3% (.DOC) Microsoft Word document (old ver.) (19000/1/2)
14.0% (.) Generic OLE2 / Multistream Compound (8000/1)
Reporter abuse_ch
Tags:AveMariaRAT doc

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
OLE dump

MalwareBazaar was able to identify 10 sections in this file using oledump:

Section IDSection sizeSection name
1114 bytesCompObj
24096 bytesDocumentSummaryInformation
34096 bytesSummaryInformation
47038 bytes1Table
5373 bytesMacros/PROJECT
641 bytesMacros/PROJECTwm
72058 bytesMacros/VBA/ThisDocument
82482 bytesMacros/VBA/_VBA_PROJECT
9512 bytesMacros/VBA/dir
10169432 bytesWordDocument
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
AutoExecDocument_OpenRuns when the Word or Publisher document is opened
IOCswrxd.exeExecutable file name
SuspiciousGetObjectMay get an OLE object with a running instance
SuspiciousexecMay run an executable file or a system
SuspiciousBase64 StringsBase64-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)

Intelligence

File Origin
# of uploads :
1
# of downloads :
332
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
avemaria
Create hunting rule
ID:
1
File name:
documento.doc
Verdict:
Malicious activity
Analysis date:
2023-09-07 16:04:25 UTC
Tags:
macros-on-open rat avemaria remote warzone
Link:
https://app.any.run/tasks/86afb27f-940d-478b-8ad2-56867105f9b9

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
TwinWave.EvilDoc.GOStringGamesBangBang.20200908.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.ICEDIDOGORiginalGangsterGOMethodsM1.20200923.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.DOCXSTRGOOD.HTTPS
Create hunting rule

TwinWave.EvilDoc.CMDObfusGamesCarrotAndStick.M1.20220128.UNOFFICIAL
Create hunting rule

Sanesecurity.Badmacro.Doc.blankopen.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Сreating synchronization primitives
Searching for synchronization primitives
Launching a process
DNS request
Running batch commands by exploiting the app vulnerability
Result
Verdict:
Malicious
File Type:
Legacy Word File with Macro
Link:
https://app.docguard.net/b3c1d51c200dbbeea2ebeacdce3cb1b70fec80bdf8042f177cd152cbe595677a/results/dashboard
Behaviour
BlacklistAPI detected
Document image
Image:
Download PNG
Document image
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
cmd macros macros-on-open packed powershell
Link:
https://www.filescan.io/uploads/64f9f3fa4578d9c35e0657d6/reports/6ef54ada-c5ae-46c2-a5ff-5102717e732c/overview
Verdict:
Malicious
Labled as:
Valyria
Link:
https://www.hybrid-analysis.com/sample/b3c1d51c200dbbeea2ebeacdce3cb1b70fec80bdf8042f177cd152cbe595677a
Label:
Malicious
Suspicious Score:
7.9/10
Score Malicious:
8%
Score Benign:
2%
Link:
https://www.malware.ai/gui/files/?id=a5e759e5-c4ee-4abe-bbc8-5ca1f8a9500e
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/b3c1d51c200dbbeea2ebeacdce3cb1b70fec80bdf8042f177cd152cbe595677a
Details
Macro with Startup Hook
Detected macro logic that will automatically execute on document open. Most malware contains some execution hook.
Document With Few Pages
Document contains between one and three pages of content. Most malicious documents are sparse in page count.
Macro Contains Suspicious String
Detected a macro with a suspicious string. Suspicious strings include privileged function calls, obfuscations, odd registry keys, etc...
Result
Threat name:
AveMaria, UACMe
Create hunting rule
Detection:
malicious
Classification:
phis.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1305515
Signature
.NET source code contains potential unpacker
Allocates memory in foreign processes
Antivirus / Scanner detection for submitted sample
C2 URLs / IPs found in malware configuration
Contains functionality to check if Internet connection is working
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
Document contains an embedded VBA macro which may execute processes
Document contains an embedded VBA with base64 encoded strings
Document exploit detected (process start blacklist hit)
Drops PE files to the user root directory
Found evasive API chain (may stop execution after checking mutex)
Found evasive API chain checking for user administrative privileges
Found malware configuration
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
Machine Learning detection for sample
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
Powershell drops PE file
Snort IDS alert for network traffic
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Uses schtasks.exe or at.exe to add and modify task schedules
Writes to foreign memory regions
Yara detected AveMaria stealer
Yara detected UACMe UAC Bypass tool
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1305515 Sample: documento.doc Startdate: 07/09/2023 Architecture: WINDOWS Score: 100 115 transfer.sh 2->115 127 Snort IDS alert for network traffic 2->127 129 Found malware configuration 2->129 131 Malicious sample detected (through community Yara rule) 2->131 133 12 other signatures 2->133 12 WINWORD.EXE 8 15 2->12         started        15 taskeng.exe 1 2->15         started        signatures3 process4 signatures5 169 Obfuscated command line found 12->169 17 cmd.exe 12->17         started        19 cmd.exe 12->19         started        21 cmd.exe 12->21         started        28 9 other processes 12->28 23 bupo.exe 15->23         started        26 bupo.exe 15->26         started        process6 signatures7 30 powershell.exe 12 6 17->30         started        35 powershell.exe 19->35         started        37 powershell.exe 21->37         started        147 Multi AV Scanner detection for dropped file 23->147 149 Contains functionality to hide user accounts 23->149 151 Machine Learning detection for dropped file 23->151 45 4 other processes 23->45 153 Writes to foreign memory regions 26->153 155 Allocates memory in foreign processes 26->155 157 Injects a PE file into a foreign processes 26->157 47 4 other processes 26->47 39 powershell.exe 28->39         started        41 powershell.exe 28->41         started        43 powershell.exe 28->43         started        49 6 other processes 28->49 process8 dnsIp9 119 transfer.sh 144.76.136.153, 443, 49165, 49166 HETZNER-ASDE Germany 30->119 113 C:\Users\Public\swrxd.exe, PE32 30->113 dropped 121 Drops PE files to the user root directory 30->121 123 Powershell drops PE file 30->123 51 swrxd.exe 1 30->51         started        54 swrxd.exe 35->54         started        56 swrxd.exe 37->56         started        58 swrxd.exe 39->58         started        60 swrxd.exe 41->60         started        62 swrxd.exe 43->62         started        125 Contains functionality to hide user accounts 45->125 64 schtasks.exe 45->64         started        66 schtasks.exe 47->66         started        68 4 other processes 49->68 file10 signatures11 process12 signatures13 135 Multi AV Scanner detection for dropped file 51->135 137 Contains functionality to hide user accounts 51->137 139 Machine Learning detection for dropped file 51->139 70 vbc.exe 3 5 51->70         started        74 cmd.exe 1 51->74         started        76 2 other processes 51->76 141 Writes to foreign memory regions 54->141 143 Allocates memory in foreign processes 54->143 145 Injects a PE file into a foreign processes 54->145 79 5 other processes 54->79 81 4 other processes 56->81 83 4 other processes 58->83 85 4 other processes 60->85 87 4 other processes 62->87 89 16 other processes 68->89 process14 dnsIp15 117 185.225.75.68, 2222, 49167 MAYAKBG Germany 70->117 159 Found evasive API chain (may stop execution after checking mutex) 70->159 161 Contains functionality to check if Internet connection is working 70->161 163 Tries to steal Mail credentials (via file / registry access) 70->163 167 7 other signatures 70->167 165 Uses schtasks.exe or at.exe to add and modify task schedules 74->165 111 C:\Users\user\AppData\Roaming\bupo\bupo.exe, PE32 76->111 dropped 91 schtasks.exe 76->91         started        93 schtasks.exe 79->93         started        95 schtasks.exe 81->95         started        97 schtasks.exe 83->97         started        99 schtasks.exe 85->99         started        101 schtasks.exe 87->101         started        103 schtasks.exe 89->103         started        105 schtasks.exe 89->105         started        107 2 other processes 89->107 file16 signatures17 process18 process19 109 conhost.exe 95->109         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b3c1d51c200dbbeea2ebeacdce3cb1b70fec80bdf8042f177cd152cbe595677a/
Threat name:
Script-Macro.Trojan.Valyria
Create hunting rule
Status:
Malicious
First seen:
2023-09-07 16:02:04 UTC
File Type:
Document
Extracted files:
16
AV detection:
11 of 38 (28.95%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=wpa5khbabw565ixl5lg44pfrw4h6zaf57acc6f342fjmxzmvm55a._file
Result
Malware family:
warzonerat
Create hunting rule
Score:
  10/10
Tags:
family:warzonerat infostealer macro macro_on_action rat
Link:
https://tria.ge/reports/230907-tgryfsbd82/
Behaviour
Checks processor information in registry
Creates scheduled task(s)
Enumerates system info in registry
Modifies Internet Explorer settings
Modifies registry class
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Office loads VBA resources, possible macro or embedded object present
Program crash
Drops file in Windows directory
Drops file in System32 directory
Suspicious use of SetThreadContext
Executes dropped EXE
Uses the VBS compiler for execution
Blocklisted process makes network request
Downloads MZ/PE file
Warzone RAT payload
Process spawned unexpected child process
WarzoneRat, AveMaria
Malware Config
C2 Extraction:
185.225.75.68:2222
Malware family:
Warzone
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b3c1d51c200d/report/overview.html
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/b3c1d51c200dbbeea2ebeacdce3cb1b70fec80bdf8042f177cd152cbe595677a

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:Check_OutputDebugStringA_iat
Create hunting rule
Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerException__SetConsoleCtrl
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:informational_win_ole_protected
Create hunting rule
Author:Jeff White (karttoon@gmail.com) @noottrak
Description:Identify OLE Project protection within documents.
Rule name:maldoc_getEIP_method_1
Create hunting rule
Author:Didier Stevens (https://DidierStevens.com)
Rule name:maldoc_OLE_file_magic_number
Create hunting rule
Author:Didier Stevens (https://DidierStevens.com)
Rule name:malware_shellcode_hash
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect shellcode api hash value
Rule name:meth_get_eip
Create hunting rule
Author:Willi Ballenthin
Rule name:office_document_vba
Create hunting rule
Author:Jean-Philippe Teissier / @Jipe_
Description:Office document with embedded VBA
Reference:https://github.com/jipegit/
Rule name:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits

File information

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

Malspam

AveMariaRAT

Word file doc b3c1d51c200dbbeea2ebeacdce3cb1b70fec80bdf8042f177cd152cbe595677a

(this sample)

  
Delivery method
Distributed via e-mail attachment

Comments