MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a5b55a2e907c77d723c7b81102f0691c405f43e7ee822e918d917d116500f9a6. 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


AgentTesla


Vendor detections: 6


Intelligence 6 IOCs YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a5b55a2e907c77d723c7b81102f0691c405f43e7ee822e918d917d116500f9a6
SHA3-384 hash: 5ee69f10b9964cd4d07bfb29495a4869bb2046aaf7d2900f9774240562db7b7fdae17468ee3fdc7aa1e8b1b4cec19f65
SHA1 hash: e63468da5f7e318c3cedd3bdb6ab01e175186fb7
MD5 hash: ad0af69b5d09b0efa067582cc6096916
humanhash: cola-skylark-item-florida
File name:00006765467.xlsm
Download: download sample
Signature AgentTesla
Create hunting rule
File size:60'593 bytes
First seen:2020-07-20 12:52:34 UTC
Last seen:Never
File type:Excel file xlsm
MIME type:application/octet-stream
ssdeep 1536:OzgW+gz+fW0T1lWg2ZV2Z10nIcjELcyjtg4:fW+gz+ff1lkns10n9WR
TLSH DF43D034C1EB3264D2AA5EBF045C138FDD15F4065373E50B1954027CAAC64AE7A6B3AF
Reporter abuse_ch
Tags:AgentTesla xlsm


Avatar
abuse_ch
Malspam distributing AgentTesla:

HELO: wilhelmsen.com
Sending IP: 88.218.16.194
From: Wilhelmsen Ships Service <thanh-trung.le@wilhelmsen.com>
Subject: MV PRABHU SAKHAWAT APPOINTMENT
Attachment: 00006765467.xlsm

AgentTesla payload URL:
http://88.218.16.20/ztYQWLnqiKzUcTg.exe

AgentTesla SMTP exfil server:
mail.qatarpharmas.org:587

Intelligence

File Origin
# of uploads :
1
# of downloads :
80
Origin country :
n/a
Vendor Threat Intelligence
Detection(s):
TwinWave.EvilDoc.DOCXRSTRGOOD.SCRIPTING.FILESYSTEMOBJECT.200630.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.ExcelSploitPlainSong.20200420.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.JS.Downloader-24.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.VBS.Agent-25.UNOFFICIAL
Create hunting rule

MiscreantPunch.EvilDoc.Exploit.2017-11882.M3.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a file in the %temp% directory
Launching a process
Creating a process with a hidden window
Moving a file to the %temp% directory
Deleting a recently created file
Running batch commands
Sending an HTTP GET request
Creating a file
Using the Windows Management Instrumentation requests
Launching the default Windows debugger (dwwin.exe)
Launching cmd.exe command interpreter by exploiting the app vulnerability
Creating a process from a recently created file
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/391615
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 248189 Sample: 00006765467.xlsm Startdate: 21/07/2020 Architecture: WINDOWS Score: 100 40 Multi AV Scanner detection for domain / URL 2->40 42 Malicious sample detected (through community Yara rule) 2->42 44 Multi AV Scanner detection for dropped file 2->44 46 13 other signatures 2->46 9 EXCEL.EXE 503 61 2->9         started        process3 file4 34 C:\Users\user\Desktop\~$00006765467.xlsm, data 9->34 dropped 62 Document exploit detected (creates forbidden files) 9->62 64 Document exploit detected (process start blacklist hit) 9->64 66 Microsoft Office drops suspicious files 9->66 13 cscript.exe 2 9->13         started        signatures5 process6 dnsIp7 38 88.218.16.20, 49727, 80 SERVERIUS-ASNL United Kingdom 13->38 36 C:\ProgramData\QWLnqiKzUcTg.exe, PE32 13->36 dropped 17 QWLnqiKzUcTg.exe 4 13->17         started        21 conhost.exe 13->21         started        file8 process9 file10 30 C:\Users\user\AppData\...\uzdScUsvpcwuJi.exe, PE32 17->30 dropped 32 C:\Users\user\AppData\Local\...\tmp8DB7.tmp, XML 17->32 dropped 48 Multi AV Scanner detection for dropped file 17->48 50 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 17->50 52 Machine Learning detection for dropped file 17->52 54 3 other signatures 17->54 23 QWLnqiKzUcTg.exe 2 17->23         started        26 schtasks.exe 1 17->26         started        signatures11 process12 signatures13 56 Tries to steal Mail credentials (via file access) 23->56 58 Tries to harvest and steal browser information (history, passwords, etc) 23->58 60 Installs a global keyboard hook 23->60 28 conhost.exe 26->28         started        process14
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a5b55a2e907c77d723c7b81102f0691c405f43e7ee822e918d917d116500f9a6/
Threat name:
Win32.Trojan.Bluteal
Create hunting rule
Status:
Malicious
First seen:
2020-07-20 12:54:08 UTC
AV detection:
17 of 31 (54.84%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=uw2vuluqpr35oi6hxaiqf4djdraf6q7h52bc5emnsf6rczia7gta._file
Result
Malware family:
n/a
Score:
  10/10
Tags:
n/a
Link:
https://tria.ge/reports/200720-8ljfhb6rts/
Behaviour
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: AddClipboardFormatListener
Launches Equation Editor
NTFS ADS
Suspicious use of AdjustPrivilegeToken
Creates scheduled task(s)
Script User-Agent
Suspicious use of SetWindowsHookEx
Suspicious use of SetWindowsHookEx
Suspicious behavior: AddClipboardFormatListener
Script User-Agent
Checks processor information in registry
NTFS ADS
Suspicious use of WriteProcessMemory
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: EnumeratesProcesses
Enumerates system info in registry
Office loads VBA resources, possible macro or embedded object present
Program crash
Program crash
Suspicious use of SetThreadContext
Loads dropped DLL
Blacklisted process makes network request
Executes dropped EXE
Blacklisted process makes network request
Executes dropped EXE
Process spawned unexpected child process
Process spawned unexpected child process
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Unknown
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/a5b55a2e907c77d723c7b81102f0691c405f43e7ee822e918d917d116500f9a6

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:Agenttesla_type2
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Agenttesla in memory
Reference:internal research
Rule name:CAP_HookExKeylogger
Create hunting rule
Author:Brian C. Bell -- @biebsmalwareguy
Reference:https://github.com/DFIRnotes/rules/blob/master/CAP_HookExKeylogger.yar
Rule name:SharedStrings
Create hunting rule
Author:Katie Kleemola
Description:Internal names found in LURK0/CCTV0 samples
Rule name:win_agent_tesla_w1
Create hunting rule
Author:govcert_ch
Description:Detect Agent Tesla based on common .NET code sequences

File information

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

Malspam

AgentTesla

Excel file xlsm a5b55a2e907c77d723c7b81102f0691c405f43e7ee822e918d917d116500f9a6

(this sample)

AgentTesla

Executable exe b87cc774298ac7e6db8019cfd657e7d9874d638d034238d260e0bf08f1b7f23d

  
URLhaus
https://urlhaus.abuse.ch/url/415202/
  
Delivery method
Distributed via e-mail attachment
  
Dropping
SHA256 b87cc774298ac7e6db8019cfd657e7d9874d638d034238d260e0bf08f1b7f23d
  
Dropping
MD5 4af9079a6228f2857a84e35b098d6bdd

Comments