MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4c31f34fad2724f968f6b34c835f5de3306757ce11e3a0cff8b9c695d85a2bb1. 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: 10


Maldoc score: 13


Intelligence 10 IOCs YARA File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4c31f34fad2724f968f6b34c835f5de3306757ce11e3a0cff8b9c695d85a2bb1
SHA3-384 hash: db21e18074e3bb16a531dcea8c3189e344f0494ac50636a97c3bdfa3a8ebcc075e99366b0040c201486bc657476b7b77
SHA1 hash: e0487d1082d1bdda055ab89da838c90c0bc0f6a7
MD5 hash: 303fe9e331166745e53abf66e153dba2
humanhash: music-alaska-georgia-artist
File name:Fatture settembre.xls
Download: download sample
Signature AsyncRAT
Create hunting rule
File size:110'592 bytes
First seen:2021-09-22 12:12:51 UTC
Last seen:2021-09-22 13:40:49 UTC
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 3072:Bk3hOdsylKlgryzc4bNhZFGzE+cL2knATqPn+9Cjv7oSctaMF4DKr7WjM:Bk3hOdsylKlgryzc4bNhZF+E+W2knAMO
TLSH T1B9B3BF537666C804E758877A0CEA829E7727FC112F7E03473110F76E6E77AE48D1261A
Reporter abuse_ch
Tags:AsyncRAT geo ITA xls

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: 13
OLE dump

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

Section IDSection sizeSection name
1107 bytesCompObj
2244 bytesDocumentSummaryInformation
3212 bytesSummaryInformation
498529 bytesWorkbook
5422 bytes_VBA_PROJECT_CUR/PROJECT
662 bytes_VBA_PROJECT_CUR/PROJECTwm
7991 bytes_VBA_PROJECT_CUR/VBA/Sheet1
82100 bytes_VBA_PROJECT_CUR/VBA/ThisWorkbook
92479 bytes_VBA_PROJECT_CUR/VBA/_VBA_PROJECT
10515 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
AutoExecWorkbook_OpenRuns when the Excel Workbook is opened
IOC185.157.160.147IPv4 address
SuspiciousOpenMay open a file
SuspiciousOutputMay write to a file (if combined with Open)
SuspiciousCreateObjectMay create an OLE object
SuspiciousChrMay attempt to obfuscate specific strings (use option --deobf to deobfuscate)
SuspiciousHex StringsHex-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)
SuspiciousBase64 StringsBase64-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)

Intelligence

File Origin
# of uploads :
2
# of downloads :
149
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Fatture settembre.xls
Verdict:
Malicious activity
Analysis date:
2021-09-22 12:18:04 UTC
Tags:
macros macros-on-open ta505
Link:
https://app.any.run/tasks/46c941a4-1072-4730-ba87-facaa2ad8d67

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:
n/a
Link:
https://www.capesandbox.com/analysis/190155/
Detection(s):
TwinWave.EvilDoc.DOCXSTRGOOD..CMD.201021.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.CROKissFromARose.M5.20210108.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.DOCXSTRGOOD.HTTP
Create hunting rule

TwinWave.EvilDoc.DOCXRSTRGOOD.START-BITSTRANSFER.210729.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malicious
File Type:
Legacy Excel File with Macro
Link:
https://app.docguard.net/4c31f34fad2724f968f6b34c835f5de3306757ce11e3a0cff8b9c695d85a2bb1/results/dashboard
Payload URLs
URL
File name
185.157.160.147
ThisWorkbook
Document image
Image:
Download PNG
Document image
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/4c31f34fad2724f968f6b34c835f5de3306757ce11e3a0cff8b9c695d85a2bb1
Details
Macro with Startup Hook
Detected macro logic that will automatically execute on document open. Most malware contains some execution hook.
Macro with File System Write
Detected macro logic that can write data to the file system.
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
Create hunting rule
Detection:
malicious
Classification:
expl.evad.troj
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/855560
Signature
.NET source code contains potential unpacker
Allocates memory in foreign processes
Antivirus detection for dropped file
Document exploit detected (creates forbidden files)
Document exploit detected (process start blacklist hit)
Found malware configuration
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)
Sample uses process hollowing technique
Sigma detected: Bad Opsec Defaults Sacrificial Processes With Improper Arguments
Sigma detected: Execution from Suspicious Folder
Sigma detected: Microsoft Office Product Spawning Windows Shell
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses known network protocols on non-standard ports
Writes to foreign memory regions
Yara detected AsyncRAT
Yara detected Obfuscated Powershell
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 488006 Sample: Fatture settembre.xls Startdate: 22/09/2021 Architecture: WINDOWS Score: 100 45 Found malware configuration 2->45 47 Multi AV Scanner detection for submitted file 2->47 49 Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros) 2->49 51 10 other signatures 2->51 9 jb.exe 2->9         started        12 EXCEL.EXE 26 23 2->12         started        15 jb.exe 2->15         started        process3 file4 53 Antivirus detection for dropped file 9->53 55 Multi AV Scanner detection for dropped file 9->55 57 Machine Learning detection for dropped file 9->57 63 3 other signatures 9->63 17 RegAsm.exe 3 9->17         started        19 RegAsm.exe 9->19         started        37 C:\Users\Public\Documents\ownermention.cmd, ASCII 12->37 dropped 59 Document exploit detected (creates forbidden files) 12->59 21 cmd.exe 1 12->21         started        61 Sample uses process hollowing technique 15->61 23 RegAsm.exe 2 15->23         started        signatures5 process6 process7 25 powershell.exe 26 21->25         started        28 conhost.exe 21->28         started        dnsIp8 43 185.157.160.147, 1973, 4444, 49779 OBE-EUROPEObenetworkEuropeSE Sweden 25->43 30 Congressparticular.exe 1 2 25->30         started        process9 file10 39 C:\Users\user\AppData\Roaming\ja\jb.exe, PE32 30->39 dropped 65 Sample uses process hollowing technique 30->65 34 RegAsm.exe 2 30->34         started        signatures11 process12 dnsIp13 41 192.168.2.1 unknown unknown 34->41
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4c31f34fad2724f968f6b34c835f5de3306757ce11e3a0cff8b9c695d85a2bb1/
Threat name:
Win32.Trojan.Valyria
Create hunting rule
Status:
Malicious
First seen:
2021-09-22 12:13:07 UTC
AV detection:
10 of 45 (22.22%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=jqy7gt5ne4sps2hwwngigx254mygov6ochr2bt7yxhdjlwc2foyq._file
Result
Malware family:
asyncrat
Create hunting rule
Score:
  10/10
Tags:
family:asyncrat botnet:17 macro macro_on_action persistence rat xlm
Link:
https://tria.ge/reports/210922-pdrfascec6/
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
Suspicious use of SetThreadContext
Adds Run key to start application
Downloads MZ/PE file
Async RAT payload
AsyncRat
Process spawned unexpected child process
Malware Config
C2 Extraction:
185.157.160.147:1973
Dropper Extraction:
http://185.157.160.147:4444/BTconsole3.exe
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/4c31f34fad2724f968f6b34c835f5de3306757ce11e3a0cff8b9c695d85a2bb1

File information

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

Cape
Cape
https://www.capesandbox.com/analysis/190155/

Comments