MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 6f40028f8cc674a39ca5564371ec08400e09c0f04cb55dba2f2791292e80920c. 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

AsyncRAT

Vendor detections: 11

Maldoc score: 33

Intelligence 11 IOCs YARA File information Comments 1

SHA256 hash:	6f40028f8cc674a39ca5564371ec08400e09c0f04cb55dba2f2791292e80920c
SHA3-384 hash:	ba8cc543cc2910009cc678a5bfece7b3b54d42aa42364ce0cd8192d8cc987e62822284f97197409c8fe235c843ff66d8
SHA1 hash:	58f87762f55ee61d8ff601381840755da95d4311
MD5 hash:	e2235a813cb871f2156148c7fc13489f
humanhash:	enemy-wolfram-cold-magnesium
File name:	e2235a813cb871f2156148c7fc13489f
Download:	download sample
Signature	AsyncRAT Create hunting rule
File size:	143'360 bytes
First seen:	2022-01-06 02:40:31 UTC
Last seen:	Never
File type:	docx
MIME type:	application/msword
ssdeep	3072:vNe9+OHXMKZ7hRVlDvU/jfFWSivIQU8Tn:vNe9+O8KZ7TVlDvONWrv88Tn
TLSH	T14BE3D0687980E917F9A689B44DD7D7EA37343C88AF45E11B31683B6C3E772E99D00381
Reporter	zbetcheckin
Tags:	AsyncRAT doc docx

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: 33

OLE dump

MalwareBazaar was able to identify 12 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	7001 bytes	1Table
5	92519 bytes	Data
6	488 bytes	Macros/PROJECT
7	71 bytes	Macros/PROJECTwm
8	1014 bytes	Macros/VBA/NewMacros
9	13222 bytes	Macros/VBA/ThisDocument
10	10348 bytes	Macros/VBA/_VBA_PROJECT
11	579 bytes	Macros/VBA/dir
12	4096 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	Document_Open	Runs when the Word or Publisher document is opened
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	adodb.stream	May create a text file
Suspicious	SaveToFile	May create a text file
Suspicious	Shell	May run an executable file or a system command
Suspicious	vbNormalFocus	May run an executable file or a system command
Suspicious	WScript.Shell	May run an executable file or a system command
Suspicious	CreateObject	May create an OLE object
Suspicious	Shell.Application	May run an application (if combined with CreateObject)
Suspicious	microsoft.xmlhttp	May download files from the Internet
Suspicious	Chr	May attempt to obfuscate specific strings (use option --deobf to deobfuscate)
Suspicious	StrReverse	May attempt to obfuscate specific strings (use option --deobf to deobfuscate)
Suspicious	Xor	May attempt to obfuscate specific strings (use option --deobf to deobfuscate)
Suspicious	Hex Strings	Hex-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)
Suspicious	Base64 Strings	Base64-encoded strings were detected, may be used to obfuscate strings (option --decode to see all) code and P-code are different, this may have been used to hide malicious code

Intelligence

File Origin

# of uploads :

# of downloads :

309

Origin country :

n/a

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

e2235a813cb871f2156148c7fc13489f

Verdict:

Malicious activity

Analysis date:

2022-01-06 02:42:52 UTC

Tags:

macros macros-on-open

Link:

https://app.any.run/tasks/3d4f5bd1-e0bf-46e8-96b0-09b2677a6b1e

Note:

ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample

Verdict:

Malicious

File type:

application/vnd.openxmlformats-officedocument.wordprocessingml.document

Has a screenshot:

False

Contains macros:

False

Detection(s):

Xls.Macro.Obfuscation-9804250-0

MiscreantPunch.EvilMacro.AODBWSRBMS.UNOFFICIAL

MiscreantPunch.EvilMacro.DL.170224.UNOFFICIAL

TwinWave.EvilDoc.CROAndTheTangerineDream.M1.20200630.UNOFFICIAL

TwinWave.EvilDoc.CROAndTheTangerineDream.M2.20200630.UNOFFICIAL

TwinWave.EvilDoc.StatusIsLikeAFriend.20210201.UNOFFICIAL

TwinWave.EvilDoc.DidntIBlowYourMindThisTime.20210922.UNOFFICIAL

Result

Verdict:

Malware

Maliciousness:

Behaviour

Searching for the window

DNS request

Creating a window

Сreating synchronization primitives

Sending a custom TCP request

Creating a file in the %AppData% subdirectories

Launching a process

Creating a process with a hidden window

Sending an HTTP GET request

Unauthorized injection to a recently created process

Sending a custom TCP request by exploiting the app vulnerability

Creating a process from a recently created file

Result

Verdict:

Malicious

File Type:

Legacy Word File with Macro

Link:

https://app.docguard.net/6f40028f8cc674a39ca5564371ec08400e09c0f04cb55dba2f2791292e80920c/results/dashboard

Document image

Image:

Download PNG

Verdict:

Malicious

Threat level:

10/10

Confidence:

60%

Tags:

evasive macros macros-on-open vbastomped

Link:

https://www.filescan.io/uploads/61d656c3135d97804c0e5a77/reports/7efffe13-8623-45c8-af91-34e204bffb07/overview

Result

Verdict:

MALICIOUS

Link:

https://labs.inquest.net/dfi/sha256/6f40028f8cc674a39ca5564371ec08400e09c0f04cb55dba2f2791292e80920c

Details

Suspicious Document Variables

Detected a macro that references a suspicious number of tersely named variables.

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 File System Write

Detected macro logic that can write data to the file system.

Shell.Application Object

Detected the instantiation of Shell Application object within the macro.

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:

AsyncRAT

Detection:

malicious

Classification:

troj.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/916115

Signature

Allocates memory in foreign processes

Antivirus / Scanner detection for submitted sample

Antivirus detection for URL or domain

Creates an undocumented autostart registry key

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 VBA stomped code (only p-code) potentially bypassing AV detection

Document exploit detected (creates forbidden files)

Document exploit detected (drops PE files)

Document exploit detected (process start blacklist hit)

Encrypted powershell cmdline option found

Injects a PE file into a foreign processes

Machine Learning detection for sample

Multi AV Scanner detection for domain / URL

Multi AV Scanner detection for submitted file

Office process drops PE file

Potential dropper URLs found in powershell memory

Sigma detected: Bad Opsec Defaults Sacrificial Processes With Improper Arguments

Sigma detected: MS Office Product Spawning Exe in User Dir

Sigma detected: Suspicious Encoded PowerShell Command Line

Uses dynamic DNS services

Writes to foreign memory regions

Yara detected AsyncRAT

Behaviour

Behavior Graph:

Download SVG

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/6f40028f8cc674a39ca5564371ec08400e09c0f04cb55dba2f2791292e80920c/

Threat name:

Script-Macro.Trojan.AsyncRAT

Status:

Malicious

First seen:

2022-01-06 02:41:14 UTC

File Type:

Document

Extracted files:

AV detection:

22 of 43 (51.16%)

Threat level:

5/5

Result

Malware family:

asyncrat

Score:

10/10

Tags:

family:asyncrat macro macro_on_action rat

Link:

https://tria.ge/reports/220106-c6f4tabccq/

Behaviour

Checks processor information in registry

Enumerates system info in registry

Modifies Internet Explorer settings

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

Enumerates physical storage devices

Suspicious use of SetThreadContext

Executes dropped EXE

AsyncRat

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/6f40028f8cc6/report/overview.html

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

Threat name:

iSpy Keylogger

Score:

1.00

Link:

https://yomi.yoroi.company/submissions/6f40028f8cc674a39ca5564371ec08400e09c0f04cb55dba2f2791292e80920c

File information

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

Web download

AsyncRAT

docx 6f40028f8cc674a39ca5564371ec08400e09c0f04cb55dba2f2791292e80920c

(this sample)

Delivery method

Distributed via web download

URLhaus

https://urlhaus.abuse.ch/url/1952195/

Comments

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zbet commented on 2022-01-06 02:40:32 UTC

url : hxxps://www.js-hurling.com/okpoitu/Apexbuildd.doc