MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4f5efd3d38b251899edd281002f0968e55b75849895beb36993f56564899dc84. 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: 7


Intelligence 7 IOCs YARA 4 File information Comments
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SHA256 hash: 4f5efd3d38b251899edd281002f0968e55b75849895beb36993f56564899dc84
SHA3-384 hash: 97e49d7f493654248a9cab65bc98de077848f7d51e5248663441f58a63312536eb234dcab85007325fbb86f6cdf8f6da
SHA1 hash: d9b18f75ef6ff0a1186b10e468ad43dd6deff4dc
MD5 hash: 9821083b9af3c73dbe453a17b477e423
humanhash: march-monkey-yankee-dakota
File name:Order310720a.xlsm
Download: download sample
Signature AgentTesla
Create hunting rule
File size:83'862 bytes
First seen:2020-07-31 06:20:05 UTC
Last seen:Never
File type:Excel file xlsm
MIME type:application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
ssdeep 1536:HIz7U+RzDP04KTouY6+pdQ8nsfzBayZeZMx6LCBtUKex:HIz7Um/uYVDQ8QzBayZeZQ6uvCx
TLSH 99833A478905DBD3E02C92F9BE075EAC5F5E2B1C94823AEE11570D9B7F613212D8E06D
Reporter abuse_ch
Tags:AgentTesla xlsm


Avatar
abuse_ch
Malspam distributing AgentTesla:

HELO: mailserver.aerospeedgroup.com
Sending IP: 103.30.245.46
From: Sales <winda@trimgairlines.com>
Subject: New order
Attachment: Order310720a.xlsm

AgentTesla payload URL:
https://bozlarenerji.com/wp-content/themes/busify/bbb/oYhEAIrrrubnacp.exe

AgentTesla SMTP exfil server:
mail.memorybasket.co.in:587

Intelligence

File Origin
# of uploads :
1
# of downloads :
65
Origin country :
n/a
Vendor Threat Intelligence
Detection(s):
TwinWave.EvilDoc.AutoTriggerEvilMrFantasyM1.20200716.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.AutoTriggerEvilMrFantasyM3.20200721.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a process with a hidden window
DNS request
Sending a custom TCP request
Creating a file in the Windows subdirectories
Creating a file in the %temp% directory
Creating a process from a recently created file
Running batch commands by exploiting the app vulnerability
Launching a file downloaded from the Internet
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/404553
Signature
Bypasses PowerShell execution policy
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Document contains an embedded VBA with hexadecimal encoded strings
Document exploit detected (process start blacklist hit)
Found malware configuration
Injects a PE file into a foreign processes
Installs a global keyboard hook
Machine Learning detection for dropped file
Machine Learning detection for sample
Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)
Powershell drops PE file
Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
Sigma detected: Microsoft Office Product Spawning Windows Shell
Sigma detected: Powershell download file and shellexecute
Sigma detected: Scheduled temp file as task from temp location
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
Suspicious powershell command line found
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to download and execute files (via powershell)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to harvest and steal ftp login credentials
Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc)
Tries to steal Mail credentials (via file access)
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AgentTesla
Yara detected AntiVM_3
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 254506 Sample: Order310720a.xlsm Startdate: 31/07/2020 Architecture: WINDOWS Score: 100 48 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->48 50 Found malware configuration 2->50 52 Sigma detected: Scheduled temp file as task from temp location 2->52 54 13 other signatures 2->54 10 EXCEL.EXE 34 27 2->10         started        process3 file4 42 C:\Users\user\Desktop\~$Order310720a.xlsm, data 10->42 dropped 66 Document exploit detected (process start blacklist hit) 10->66 14 cmd.exe 1 10->14         started        signatures5 process6 signatures7 76 Suspicious powershell command line found 14->76 78 Tries to download and execute files (via powershell) 14->78 17 powershell.exe 15 19 14->17         started        22 conhost.exe 14->22         started        process8 dnsIp9 44 bozlarenerji.com 185.22.187.57, 443, 49716 CIZGITR Turkey 17->44 36 C:\Users\user\AppData\Local\Temp\aQWZH.exe, PE32 17->36 dropped 56 Powershell drops PE file 17->56 24 aQWZH.exe 6 17->24         started        file10 signatures11 process12 file13 38 C:\Users\user\AppData\...\&startupname&.exe, PE32 24->38 dropped 40 C:\Users\user\AppData\Local\...\tmp3444.tmp, XML 24->40 dropped 58 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 24->58 60 Machine Learning detection for dropped file 24->60 62 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 24->62 64 2 other signatures 24->64 28 aQWZH.exe 2 24->28         started        32 schtasks.exe 1 24->32         started        signatures14 process15 dnsIp16 46 mail.memorybasket.co.in 148.66.136.55, 49730, 587 AS-26496-GO-DADDY-COM-LLCUS Singapore 28->46 68 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 28->68 70 Tries to steal Mail credentials (via file access) 28->70 72 Tries to harvest and steal ftp login credentials 28->72 74 2 other signatures 28->74 34 conhost.exe 32->34         started        signatures17 process18
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4f5efd3d38b251899edd281002f0968e55b75849895beb36993f56564899dc84/
Threat name:
Script-Macro.Trojan.Tiggre
Create hunting rule
Status:
Malicious
First seen:
2020-07-31 06:21:04 UTC
AV detection:
13 of 29 (44.83%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=j5pp2pjywjiythw5faiaf4ewrzk3owcjrfn6wnuzh5lfmsez3sca._file
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
keylogger stealer spyware trojan family:agenttesla
Link:
https://tria.ge/reports/200731-kabz544xke/
Behaviour
Suspicious use of AdjustPrivilegeToken
Creates scheduled task(s)
Suspicious use of SetWindowsHookEx
Suspicious behavior: EnumeratesProcesses
Modifies system certificate store
Suspicious behavior: AddClipboardFormatListener
Suspicious use of WriteProcessMemory
Office loads VBA resources, possible macro or embedded object present
Suspicious use of SetThreadContext
Reads user/profile data of web browsers
Reads data files stored by FTP clients
Reads user/profile data of local email clients
Loads dropped DLL
Blacklisted process makes network request
Executes dropped EXE
AgentTesla Payload
AgentTesla
Process spawned unexpected child process
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Trojan
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/4f5efd3d38b251899edd281002f0968e55b75849895beb36993f56564899dc84

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 4f5efd3d38b251899edd281002f0968e55b75849895beb36993f56564899dc84

(this sample)

AgentTesla

Executable exe d2975702f9c3eafc8e8c2f42cdfeaf4252377bf1566e5a572d3f2c94d5008c1f

  
URLhaus
https://urlhaus.abuse.ch/url/422567/
  
Delivery method
Distributed via e-mail attachment
  
Dropping
SHA256 d2975702f9c3eafc8e8c2f42cdfeaf4252377bf1566e5a572d3f2c94d5008c1f
  
Dropping
MD5 bd2b5272f01678e8ae7ae8819e9456fc

Comments