MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b494a52216ce9d2d84b26d6acb36352bf93e097977e5a2c99d54de29d6d39953. 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: 9


Intelligence 9 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b494a52216ce9d2d84b26d6acb36352bf93e097977e5a2c99d54de29d6d39953
SHA3-384 hash: 6092db8dba1624908155cb9f3eaf933c362ddd0d69672c38c53fab8018c48065bb716d2b7c12f87894a9056380a35466
SHA1 hash: ce690e2195300e4154219c1b6904c7a9110dae1d
MD5 hash: 9b5cb74148f26aed52c1034cb1ffca89
humanhash: south-spring-foxtrot-washington
File name:REFRENCE.exe
Download: download sample
Signature AgentTesla
Create hunting rule
File size:790'016 bytes
First seen:2022-07-20 22:19:58 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep 24576:PizurQJ0eOLlBY+UyDT3JcyR8sZTikeFUd:Pizv0ll3UoTZc48sNR
Threatray 18'693 similar samples on MalwareBazaar
TLSH T1B1F46B9CB294B1DFD8A7D5768FE86CA4FA65B87B431F51279423199D8A0C987CF000B3
TrID 47.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
15.9% (.EXE) Win64 Executable (generic) (10523/12/4)
9.9% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
7.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
6.8% (.EXE) Win32 Executable (generic) (4505/5/1)
File icon (PE):PE icon
dhash icon b2f0c09696c0f0b2 (4 x AgentTesla, 1 x SnakeKeylogger)
Reporter GovCERT_CH
Tags:AgentTesla exe

Intelligence

File Origin
# of uploads :
1
# of downloads :
311
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/293018/
Detection(s):
SecuriteInfo.com.W32.AIDetectNet.01.3838.31330.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Сreating synchronization primitives
Creating a file in the %AppData% directory
Creating a file in the %temp% directory
Launching a process
Creating a process with a hidden window
Unauthorized injection to a recently created process
Creating a file
Using the Windows Management Instrumentation requests
Enabling autorun by creating a file
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
fareit packed
Link:
https://www.filescan.io/uploads/62d87f98ef2b0e63a82b1e9c/reports/8942d29d-48e6-4662-a518-905ca099e72c/overview
Result
Verdict:
UNKNOWN
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/e2708474-ba1f-437f-a58c-e608548d07f2
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.adwa.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1038026
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code contains very large array initializations
.NET source code contains very large strings
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Hides that the sample has been downloaded from the Internet (zone.identifier)
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Modifies the hosts file
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
PE file has nameless sections
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)
Snort IDS alert for network traffic
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
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 / registry access)
Uses schtasks.exe or at.exe to add and modify task schedules
Uses the Telegram API (likely for C&C communication)
Yara detected AgentTesla
Yara detected AntiVM3
Yara detected Generic Downloader
Yara detected Telegram RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 670521 Sample: REFRENCE.exe Startdate: 21/07/2022 Architecture: WINDOWS Score: 100 58 Snort IDS alert for network traffic 2->58 60 Malicious sample detected (through community Yara rule) 2->60 62 Multi AV Scanner detection for dropped file 2->62 64 13 other signatures 2->64 7 REFRENCE.exe 6 2->7         started        11 yqWDN.exe 4 2->11         started        13 yqWDN.exe 3 2->13         started        process3 file4 36 C:\Users\user\AppData\...\zCWalGybLZI.exe, PE32 7->36 dropped 38 C:\Users\user\AppData\Local\Temp\tmpDD1.tmp, XML 7->38 dropped 40 C:\Users\user\AppData\...\REFRENCE.exe.log, ASCII 7->40 dropped 66 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 7->66 68 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 7->68 70 Uses schtasks.exe or at.exe to add and modify task schedules 7->70 72 Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent) 7->72 15 REFRENCE.exe 17 5 7->15         started        20 schtasks.exe 1 7->20         started        74 Multi AV Scanner detection for dropped file 11->74 76 Machine Learning detection for dropped file 11->76 22 yqWDN.exe 14 2 11->22         started        24 schtasks.exe 1 11->24         started        signatures5 process6 dnsIp7 42 api.telegram.org 149.154.167.220, 443, 49725, 49730 TELEGRAMRU United Kingdom 15->42 30 C:\Users\user\AppData\Roaming\...\yqWDN.exe, PE32 15->30 dropped 32 C:\Windows\System32\drivers\etc\hosts, ASCII 15->32 dropped 34 C:\Users\user\...\yqWDN.exe:Zone.Identifier, ASCII 15->34 dropped 46 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 15->46 48 Tries to steal Mail credentials (via file / registry access) 15->48 50 Modifies the hosts file 15->50 52 Hides that the sample has been downloaded from the Internet (zone.identifier) 15->52 26 conhost.exe 20->26         started        44 192.168.2.1 unknown unknown 22->44 54 Tries to harvest and steal ftp login credentials 22->54 56 Tries to harvest and steal browser information (history, passwords, etc) 22->56 28 conhost.exe 24->28         started        file8 signatures9 process10
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b494a52216ce9d2d84b26d6acb36352bf93e097977e5a2c99d54de29d6d39953/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2022-07-20 14:05:47 UTC
File Type:
PE (.Net Exe)
Extracted files:
23
AV detection:
24 of 38 (63.16%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=wskkkiqwz2os3bfsnvvmwnrvfp4t4clzo7s2fsm5ktpctvwttfjq._file
Verdict:
malicious
Label(s):
agenttesla
Create hunting rule
Similar samples:
075de88e1d72b0e350e5c94cc436544b415567934457cac37cc625df61feea69
AgentTesla
25a02b43a80b0d6e9b844869c73368ff77f2e6bba17121842b76f37d69a24472
AgentTesla
544362d61bf34c0ea65b4781d190677f855af9a399dec659014573901e6f877b
AgentTesla
64e82538ea571de74e6a09d370ac6a576f0eb060747e507cf9fba889dc6d0bbe
AgentTesla
6b0aa1abcf110cf2a0cc41bba6423ef4627c4f1aaf64b9d79de73cb37ae11339
AgentTesla
ac830d0075775ac73ff54540c9f022aeea235b55a075a1f6bd5dc4704005146f
AgentTesla
ad74c52f7c884ad9d67bea814f1fc61e2fb074c8728d703a882b6e61f5bae1d5
AgentTesla
+ 18'683 additional samples on MalwareBazaar
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
family:agenttesla collection keylogger persistence spyware stealer trojan
Link:
https://tria.ge/reports/220720-183mlaagh4/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
outlook_office_path
outlook_win_path
Enumerates physical storage devices
Suspicious use of SetThreadContext
Accesses Microsoft Outlook profiles
Adds Run key to start application
Checks computer location settings
Reads data files stored by FTP clients
Reads user/profile data of local email clients
Reads user/profile data of web browsers
Drops file in Drivers directory
AgentTesla
Malware Config
C2 Extraction:
https://api.telegram.org/bot5484820495:AAGEjy8dT72vJZImmHLmeh3onMuG9LLRD5A/sendDocument
Unpacked files
SH256 hash:
5e97ccd8dafcb36b3cb772f6a2fd425abcf221ab9ea1930e8c2618c95332f2c6
MD5 hash:
01800f6b045def8d90c649842f56d752
SHA1 hash:
f8434a4636d0772d01aac44bb3f9753a41f01d34
Link:
https://www.unpac.me/results/479e6898-18ad-4ea6-b52c-1781bf5f9afa/
SH256 hash:
26b29a3dd8e9cea34688bea3a35cc774d56436dbad0e92e2f945802169b144c7
MD5 hash:
16d2d98c444fdb67e5328a209d166658
SHA1 hash:
ea07cfff76831ec9aaca114f80907b76f4552a3a
Link:
https://www.unpac.me/results/479e6898-18ad-4ea6-b52c-1781bf5f9afa/
SH256 hash:
fea857eca4e74d1674738eef7452de33d486fa355e9538a00ab43d772e096fc5
MD5 hash:
f11d8aebe58a1f6151b346533b45e3cd
SHA1 hash:
7edb4e9cedadcea962146f5ea9e489c9579a9097
Link:
https://www.unpac.me/results/479e6898-18ad-4ea6-b52c-1781bf5f9afa/
SH256 hash:
b494a52216ce9d2d84b26d6acb36352bf93e097977e5a2c99d54de29d6d39953
MD5 hash:
9b5cb74148f26aed52c1034cb1ffca89
SHA1 hash:
ce690e2195300e4154219c1b6904c7a9110dae1d
Link:
https://www.unpac.me/results/479e6898-18ad-4ea6-b52c-1781bf5f9afa/
Malware family:
AgentTesla.v3
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b494a52216ce/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.35
Link:
https://yomi.yoroi.company/submissions/b494a52216ce9d2d84b26d6acb36352bf93e097977e5a2c99d54de29d6d39953

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:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

File information

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

Malspam

AgentTesla

Executable exe b494a52216ce9d2d84b26d6acb36352bf93e097977e5a2c99d54de29d6d39953

(this sample)

  
Dropped by
agenttesla
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/293018/

Comments