MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 5509ec26758c3c0dcf2bf1b0d7d8600da08cdcfb73cd6b90d46f84ea61c71094. 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

CobaltStrike

Vendor detections: 13

Maldoc score: 21

Intelligence 13 IOCs YARA 12 File information Comments

SHA256 hash:	5509ec26758c3c0dcf2bf1b0d7d8600da08cdcfb73cd6b90d46f84ea61c71094
SHA3-384 hash:	9cf1e2b92541f956c9500aae4877dba685b35e1f67e0413f99780c26b4d70421c23081a1d3279f9b58a55b3680d278f9
SHA1 hash:	527453a0f60ba6bd027bdd2d57a0a903270956e9
MD5 hash:	40dda1b39b42825b0877cefc8e849bf4
humanhash:	hot-sink-foxtrot-winter
File name:	prozorro3.doc
Download:	download sample
Signature	CobaltStrike Create hunting rule
File size:	274'432 bytes
First seen:	2024-01-30 10:24:52 UTC
Last seen:	Never
File type:	doc
MIME type:	application/msword
ssdeep	6144:zmJqf7Qsa9L/tO8rqSA81Pr4Y0Oz7DtL1Z:VQjL/KSA4Eoz7PZ
TLSH	T137445B327264AF13E41E4D3194EDD5A47F66FC1389A88A8F79C93F1E7C7A9106E03660
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	smica83
Tags:	apt doc UKR

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: 21

OLE dump

MalwareBazaar was able to identify 18 sections in this file using oledump:

Section ID	Section size	Section name
1	114 bytes	CompObj
2	4096 bytes	DocumentSummaryInformation
3	4096 bytes	SummaryInformation
4	17226 bytes	1Table
5	166853 bytes	Data
6	406 bytes	Macros/PROJECT
7	71 bytes	Macros/PROJECTwm
8	10708 bytes	Macros/VBA/NewMacros
9	946 bytes	Macros/VBA/ThisDocument
10	3347 bytes	Macros/VBA/_VBA_PROJECT
11	1998 bytes	Macros/VBA/__SRP_0
12	122 bytes	Macros/VBA/__SRP_1
13	768 bytes	Macros/VBA/__SRP_2
14	806 bytes	Macros/VBA/__SRP_3
15	574 bytes	Macros/VBA/dir
16	306 bytes	MsoDataStore/2IOWDU5SFOQEKA==/Item
17	341 bytes	MsoDataStore/2IOWDU5SFOQEKA==/Properties
18	53359 bytes	WordDocument

OLE vba

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

Type	Keyword	Description
AutoExec	AutoOpen	Runs when the Word document is opened
AutoExec	DocumentOpen	Runs when the Word document is opened
AutoExec	AutoClose	Runs when the Word document is closed
AutoExec	Document_Close	Runs when the Word document is closed
AutoExec	Document_Open	Runs when the Word or Publisher document is opened
AutoExec	Auto_Open	Runs when the Excel Workbook is opened
AutoExec	Auto_Close	Runs when the Excel Workbook is closed
Suspicious	Environ	May read system environment variables
Suspicious	Open	May open a file
Suspicious	Write	May write to a file (if combined with Open)
Suspicious	SaveToFile	May create a text file
Suspicious	Run	May run an executable file or a system command
Suspicious	CreateObject	May create an OLE object
Suspicious	Chr	May attempt to obfuscate specific strings (use option --deobf to deobfuscate)

Intelligence

File Origin

# of uploads :

# of downloads :

436

Origin country :

Vendor Threat Intelligence

Verdict:

Malicious

File type:

application/msword

Has a screenshot:

False

Contains macros:

True

Detection(s):

TwinWave.EvilDoc.CROCallsFunctionAndKeepsOnRunninRunnin.UNOFFICIAL

TwinWave.EvilDoc.UrlDownloaderCROSingingMonyMony.20200526.UNOFFICIAL

TwinWave.EvilDoc.CROFuncDetonatorPicturesOfYou.20200611.UNOFFICIAL

TwinWave.EvilDoc.AutoClobberHowSoonIsNow.20200707.UNOFFICIAL

TwinWave.EvilDoc.CROMiscreantNeuralLinkTerra.20210721.UNOFFICIAL

Doc.Trojan.Xshell-6923080-0

TwinWave.EvilDoc.DLrFireMapleSong.20210923.UNOFFICIAL

TwinWave.EvilDoc.RemcosNightWalks.20220412.UNOFFICIAL

TwinWave.EvilDoc.DOCXRSTRGOOD.HTTP_.210304B64.2.UNOFFICIAL

TwinWave.EvilDoc.DOCXRSTRGOOD.HTTP_.210304B64.6.UNOFFICIAL

TwinWave.EvilDoc.DOCXRSTRGOOD.HTTP_.210304B64.7.UNOFFICIAL

Result

Verdict:

Malware

Maliciousness:

Behaviour

Searching for the window

Sending a custom TCP request

Creating a window

Сreating synchronization primitives

DNS request

Creating a file in the %temp% directory

Launching a process

Sending an HTTP GET request

Running batch commands by exploiting the app vulnerability

Result

Verdict:

Malicious

File Type:

Legacy Word File with Macro

Link:

https://app.docguard.net/5509ec26758c3c0dcf2bf1b0d7d8600da08cdcfb73cd6b90d46f84ea61c71094/results/dashboard

Behaviour

BlacklistAPI detected

Document image

Image:

Download PNG

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

evasive language-uk lolbin macros macros-on-close macros-on-open packed powershell rundll32

Link:

https://www.filescan.io/uploads/65b8ce7f76d8552aff09e7e2/reports/0b25b2a6-83a5-4665-8315-da0dd656305f/overview

Verdict:

Malicious

Labled as:

GT:VB.Macros.ObfDldr.25

Link:

https://www.hybrid-analysis.com/sample/5509ec26758c3c0dcf2bf1b0d7d8600da08cdcfb73cd6b90d46f84ea61c71094

Label:

Benign

Suspicious Score:

2.4/10

Score Malicious:

25%

Score Benign:

75%

Link:

https://www.malware.ai/gui/files/?id=74455d5e-642d-440c-8ef0-f2cfa926f2f0

Result

Verdict:

MALICIOUS

Link:

https://labs.inquest.net/dfi/sha256/5509ec26758c3c0dcf2bf1b0d7d8600da08cdcfb73cd6b90d46f84ea61c71094

Details

Base64 Encoded URL

Detected an ANSI or UNICODE http:// or https:// base64 encoded URL prefix.

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 with Multiple Startup Hooks

Detected a macro with multiple startup hooks. While not necessarily nefarious, a common malware tactic.

Macro Contains Suspicious String

Detected a macro with a suspicious string. Suspicious strings include privileged function calls, obfuscations, odd registry keys, etc...

InQuest Machine Learning

An InQuest machine-learning model classified this macro as potentially malicious.

Result

Threat name:

CobaltStrike

Detection:

malicious

Classification:

troj.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1383234

Signature

Bypasses PowerShell execution policy

C2 URLs / IPs found in malware configuration

Document contains an embedded VBA macro which may check the recent opened files (possible anti-VM)

Document contains an embedded VBA macro which may execute processes

Document contains an embedded VBA macro with suspicious strings

Document contains an embedded VBA with functions possibly related to ADO stream file operations

Document contains an embedded VBA with functions possibly related to HTTP operations

Document contains an embedded VBA with many string operations indicating source code obfuscation

Document exploit detected (drops PE files)

Document exploit detected (process start blacklist hit)

Found malware configuration

Machine Learning detection for dropped file

Machine Learning detection for sample

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for submitted file

Office process drops PE file

Sigma detected: Legitimate Application Dropped Archive

Sigma detected: Potentially Suspicious PowerShell Child Processes

Sigma detected: Script Interpreter Execution From Suspicious Folder

Sigma detected: Suspicious Microsoft Office Child Process

Sigma detected: Suspicious Script Execution From Temp Folder

Snort IDS alert for network traffic

Suspicious execution chain found

Suspicious powershell command line found

System process connects to network (likely due to code injection or exploit)

Yara detected CobaltStrike

Behaviour

Behavior Graph:

Download SVG

Score:

Verdict:

Benign

File Type:

DOC

Link:

https://malprob.io/report/5509ec26758c3c0dcf2bf1b0d7d8600da08cdcfb73cd6b90d46f84ea61c71094

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/5509ec26758c3c0dcf2bf1b0d7d8600da08cdcfb73cd6b90d46f84ea61c71094/

Threat name:

Document-Word.Trojan.CobaltStrikeBeacon

Status:

Malicious

First seen:

2024-01-30 10:25:07 UTC

File Type:

Document

Extracted files:

AV detection:

16 of 24 (66.67%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=kue6yjtvrq6a3tzl6gynpwdabwqizxh3opgwxegun6couyohccka._file

Result

Malware family:

n/a

Score:

10/10

Tags:

macro macro_on_action

Link:

https://tria.ge/reports/240130-mfylaafdbj/

Behaviour

Checks processor information in registry

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

Office loads VBA resources, possible macro or embedded object present

Drops file in Windows directory

Loads dropped DLL

Blocklisted process makes network request

Downloads MZ/PE file

Process spawned unexpected child process

Malware family:

CobaltStrike

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/5509ec26758c/report/overview.html

Please note that we are no longer able to provide a coverage score for Virus Total.

Threat name:

Malicious File

Score:

0.90

Link:

https://yomi.yoroi.company/submissions/5509ec26758c3c0dcf2bf1b0d7d8600da08cdcfb73cd6b90d46f84ea61c71094

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:	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_AutoOpen_Macro Create hunting rule
Author:	Florian Roth
Description:	Detects an Microsoft Office file that contains the AutoOpen Macro function

Rule name:	Office_AutoOpen_Macro Create hunting rule
Author:	Florian Roth (Nextron Systems)
Description:	Detects an Microsoft Office file that contains the AutoOpen Macro function

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:	TA505_Maldoc_21Nov_2 Create hunting rule
Author:	Arkbird_SOLG
Description:	invitation (1).xls
Reference:	https://twitter.com/58_158_177_102/status/1197432303057637377