MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b51c07d9a4e50ac499514d378320260821bd7486acd1077a6bddf8ab70c6a2b3. 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: 12


Maldoc score: 13


Intelligence 12 IOCs 1 YARA 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b51c07d9a4e50ac499514d378320260821bd7486acd1077a6bddf8ab70c6a2b3
SHA3-384 hash: 61d3c431c92f401c25d30601558dc60042d392a9f197e91a9aae14c28a5af675d733c7c087d4bbb4e326c9487b4ea24d
SHA1 hash: 1c1544fbad9dc1abe6585e85ce686bba5f5e85a2
MD5 hash: ee6d2f06ce4476370cb830acb3890dca
humanhash: wisconsin-enemy-jupiter-fanta
File name:Doc2000120201.xls
Download: download sample
Signature AsyncRAT
Create hunting rule
File size:43'520 bytes
First seen:2021-06-09 07:54:08 UTC
Last seen:2021-06-09 08:44:44 UTC
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 768:L77k3hbdlylKsgqopeJBWhZFGkE+cL2NdAJD+5HHUqCmTdSai/aFJnHKN+:v7k3hbdlylKsgqopeJBWhZFGkE+cL2Nf
TLSH BF13C5A3B291D916C95907768CE7CAD26623BC51AF73938B3245F70E1F72AC08A03657
Reporter abuse_ch
Tags:AsyncRAT RAT xls


Avatar
abuse_ch
AsyncRAT C2:
185.136.169.163:3480

Indicators Of Compromise (IOCs)

Below is a list of indicators of compromise (IOCs) associated with this malware samples.

IOCThreatFox Reference
185.136.169.163:3480 https://threatfox.abuse.ch/ioc/80570/

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
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
3260 bytesSummaryInformation
428172 bytesWorkbook
5488 bytes_VBA_PROJECT_CUR/PROJECT
686 bytes_VBA_PROJECT_CUR/PROJECTwm
7991 bytes_VBA_PROJECT_CUR/VBA/Sheet1
81246 bytes_VBA_PROJECT_CUR/VBA/ThisWorkbook
92831 bytes_VBA_PROJECT_CUR/VBA/_VBA_PROJECT
103147 bytes_VBA_PROJECT_CUR/VBA/dhDSfUa
11594 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
SuspiciousShellMay run an executable file or a system command
SuspiciousWscript.ShellMay run an executable file or a system command
SuspiciousRunMay run an executable file or a system command
SuspiciousCreateObjectMay create an OLE object
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 :
239
Origin country :
n/a
Vendor Threat Intelligence
Verdict:
Malicious
File type:
application/vnd.ms-excel
Has a screenshot:
False
Contains macros:
True
Detection:
AsyncRat
Create hunting rule
Link:
https://www.capesandbox.com/analysis/165562/
Detection(s):
MiscreantPunch.EvilMacro.PSHELLNEWOBJECTw.3.UNOFFICIAL
Create hunting rule

MiscreantPunch.EvilMacro.PSHELLB64ENVTMP.3.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.DOCXRSTRGOOD.NEW-OBJECT.200322B64.3.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.DOCXRSTRGOOD.NEW_OBJECT.200630B64.3.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.DOCXRSTRGOOD.HTTP_.210304B64.8.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a process with a hidden window
DNS request
Sending an HTTP GET request
Creating a file in the %temp% directory
Creating a process from a recently created file
Creating a file in the %AppData% directory
Launching a process
Deleting a recently created file
Unauthorized injection to a recently created process by context flags manipulation
Launching a process by exploiting the app vulnerability
Enabling autorun by creating a file
Result
Verdict:
Malicious
File Type:
Legacy Excel File with Macro
Link:
https://app.docguard.net/b51c07d9a4e50ac499514d378320260821bd7486acd1077a6bddf8ab70c6a2b3/results/dashboard
Document image
Image:
Download PNG
Document image
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/b51c07d9a4e50ac499514d378320260821bd7486acd1077a6bddf8ab70c6a2b3
Details
Base64 Encoded Powershell Directives
Detected one or more base64 encoded Powershell directives.
Macro with Startup Hook
Detected macro logic that will automatically execute on document open. Most malware contains some execution hook.
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:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/799388
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code contains potential unpacker
.NET source code contains very large strings
Document contains an embedded VBA macro with suspicious strings
Document exploit detected (process start blacklist hit)
Found malware configuration
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
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)
Powershell drops PE file
Sigma detected: Microsoft Office Product Spawning Windows Shell
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AntiVM3
Yara detected AsyncRAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 431787 Sample: Doc2000120201.xls Startdate: 09/06/2021 Architecture: WINDOWS Score: 100 46 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->46 48 Found malware configuration 2->48 50 Multi AV Scanner detection for dropped file 2->50 52 12 other signatures 2->52 8 EXCEL.EXE 57 13 2->8         started        process3 process4 10 powershell.exe 12 7 8->10         started        dnsIp5 36 suyashcollegeofnursing.com 103.21.59.173, 49165, 80 PUBLIC-DOMAIN-REGISTRYUS United Arab Emirates 10->36 28 C:\Users\user\AppData\Local\...\jfcbvept.exe, PE32 10->28 dropped 54 Powershell drops PE file 10->54 15 jfcbvept.exe 1 8 10->15         started        file6 signatures7 process8 file9 30 C:\Users\user\AppData\Roaming\vpiTptzmD.exe, PE32 15->30 dropped 32 C:\Users\user\AppData\Local\...\tmp4808.tmp, XML 15->32 dropped 38 Multi AV Scanner detection for dropped file 15->38 40 Machine Learning detection for dropped file 15->40 42 Uses schtasks.exe or at.exe to add and modify task schedules 15->42 44 Injects a PE file into a foreign processes 15->44 19 jfcbvept.exe 4 15->19         started        22 schtasks.exe 15->22         started        24 jfcbvept.exe 15->24         started        26 jfcbvept.exe 15->26         started        signatures10 process11 dnsIp12 34 185.136.169.163, 3480, 49166 VELIANET-ASvelianetInternetdiensteGmbHDE United Kingdom 19->34
Detection:
asyncrat
Create hunting rule
Link:
https://mwdb.cert.pl/sample/b51c07d9a4e50ac499514d378320260821bd7486acd1077a6bddf8ab70c6a2b3/
Threat name:
Script-PowerShell.Trojan.Heuristic
Create hunting rule
Status:
Malicious
First seen:
2021-06-09 07:55:10 UTC
AV detection:
6 of 46 (13.04%)
Threat level:
  2/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=wuoapwne4ufmjgkrju3ygibgbaq325egvtiqo6tl3x4kw4ggukzq._file
Result
Malware family:
asyncrat
Create hunting rule
Score:
  10/10
Tags:
family:asyncrat macro macro_on_action rat xlm
Link:
https://tria.ge/reports/210609-qcmp1n1j4e/
Behaviour
Checks processor information in registry
Creates scheduled task(s)
Enumerates system info in registry
Modifies Internet Explorer settings
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
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
Loads dropped DLL
Blocklisted process makes network request
Downloads MZ/PE file
Executes dropped EXE
Async RAT payload
AsyncRat
Process spawned unexpected child process
Malware Config
C2 Extraction:
127.0.0.1:6606
127.0.0.1:7707
127.0.0.1:8808
127.0.0.1:3480
185.136.169.163:6606
185.136.169.163:7707
185.136.169.163:8808
185.136.169.163:3480
Dropper Extraction:
http://suyashcollegeofnursing.com/language/Don163/CryptedFile163.exe
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/b51c07d9a4e50ac499514d378320260821bd7486acd1077a6bddf8ab70c6a2b3

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:Email_stealer_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Email in files like avemaria
Rule name:INDICATOR_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFu
Create hunting rule
Author:ditekSHen
Description:Detect executables with stomped PE compilation timestamp that is greater than local current time
Rule name:INDICATOR_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFuture
Create hunting rule
Author:ditekSHen
Description:Detect executables with stomped PE compilation timestamp that is greater than local current time
Rule name:IPPort_combo_mem
Create hunting rule
Author:James_inthe_box
Description:IP and port combo
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:UAC_bypass_bin_mem
Create hunting rule
Author:James_inthe_box
Description:UAC bypass in files like avemaria

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/165562/

Comments