MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b3be1fe7098ff321491612d574fa9b51205e823f9883abe7f234aaa39f0a32bd. 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: 12


Intelligence 12 IOCs YARA 5 File information Comments

SHA256 hash: b3be1fe7098ff321491612d574fa9b51205e823f9883abe7f234aaa39f0a32bd
SHA3-384 hash: 264dee8353332c2e402dd93c48186eb9e072296510d6d4cfe72ce848e104f553dcf5478bcb99cfcda40aa6d65c08a622
SHA1 hash: 388db5c1eb3474699a4a2c98716da0537e3fc4db
MD5 hash: 6a0a9e6e1d0d18b353682868231719dc
humanhash: october-tennis-mountain-stream
File name:DHL OVERDUE LETTER.exe
Download: download sample
Signature AgentTesla
File size:7'168 bytes
First seen:2023-08-22 12:07:49 UTC
Last seen:2023-08-28 11:45:17 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 96:3cVIpfDNi//Q8iQM3G4L9VDjXzKDFC9YRzNt:4Ipf0//Q8iQM3G4LznX+Lz
Threatray 5'614 similar samples on MalwareBazaar
TLSH T1B2E1B72363D89732E6720B76D8B39782027AF360589BCF1F5888110E6E533554793BE1
TrID 71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.2% (.EXE) Win64 Executable (generic) (10523/12/4)
6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.3% (.EXE) Win32 Executable (generic) (4505/5/1)
2.0% (.ICL) Windows Icons Library (generic) (2059/9)
Reporter James_inthe_box
Tags:AgentTesla exe

Intelligence


File Origin
# of uploads :
4
# of downloads :
296
Origin country :
US US
Vendor Threat Intelligence
Malware family:
agenttesla
ID:
1
File name:
DHL OVERDUE LETTER.exe
Verdict:
Malicious activity
Analysis date:
2023-08-22 12:08:47 UTC
Tags:
stealer agenttesla

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Сreating synchronization primitives
DNS request
Sending a custom TCP request
Sending an HTTP GET request
Creating a file in the %AppData% directory
Launching a process
Creating a file
Using the Windows Management Instrumentation requests
Reading critical registry keys
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Stealing user critical data
Unauthorized injection to a system process
Gathering data
Result
Verdict:
MALICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Result
Threat name:
AgentTesla
Detection:
malicious
Classification:
spre.troj.spyw.evad
Score:
100 / 100
Signature
.NET source code contains potential unpacker
Found malware configuration
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
May check the online IP address of the machine
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
Sample uses string decryption to hide its real strings
Sigma detected: MSBuild connects to smtp port
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 Putty / WinSCP information (sessions, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Writes to foreign memory regions
Yara detected AgentTesla
Yara detected AntiVM3
Yara detected Costura Assembly Loader
Behaviour
Behavior Graph:
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1295132 Sample: DHL_OVERDUE_LETTER.exe Startdate: 22/08/2023 Architecture: WINDOWS Score: 100 32 mail.sirisexpress.com 2->32 34 files.catbox.moe 2->34 36 2 other IPs or domains 2->36 48 Found malware configuration 2->48 50 Multi AV Scanner detection for submitted file 2->50 52 Yara detected AgentTesla 2->52 54 7 other signatures 2->54 7 DHL_OVERDUE_LETTER.exe 16 5 2->7         started        12 Rdxwyn.exe 14 5 2->12         started        14 Rdxwyn.exe 4 2->14         started        signatures3 process4 dnsIp5 38 files.catbox.moe 108.181.20.35, 443, 49762, 49770 ASN852CA Canada 7->38 26 C:\Users\user\AppData\Roaming\Rdxwyn.exe, PE32 7->26 dropped 56 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 7->56 58 Writes to foreign memory regions 7->58 60 Injects a PE file into a foreign processes 7->60 16 MSBuild.exe 14 2 7->16         started        62 Multi AV Scanner detection for dropped file 12->62 64 Machine Learning detection for dropped file 12->64 20 MSBuild.exe 12->20         started        22 MSBuild.exe 12->22         started        24 MSBuild.exe 14->24         started        file6 signatures7 process8 dnsIp9 28 mail.sirisexpress.com 23.106.253.14, 49769, 49774, 49776 LEASEWEB-APAC-SIN-11LeasewebAsiaPacificpteltdSG Singapore 16->28 30 api4.ipify.org 104.237.62.211, 443, 49763, 49773 WEBNXUS United States 16->30 40 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 16->40 42 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 16->42 44 Tries to steal Mail credentials (via file / registry access) 16->44 46 Tries to harvest and steal browser information (history, passwords, etc) 24->46 signatures10
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Status:
Malicious
First seen:
2023-08-22 01:54:37 UTC
File Type:
PE (.Net Exe)
Extracted files:
3
AV detection:
22 of 37 (59.46%)
Threat level:
  5/5
Result
Malware family:
n/a
Score:
  6/10
Tags:
persistence
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Adds Run key to start application
Looks up external IP address via web service
Unpacked files
SH256 hash:
b3be1fe7098ff321491612d574fa9b51205e823f9883abe7f234aaa39f0a32bd
MD5 hash:
6a0a9e6e1d0d18b353682868231719dc
SHA1 hash:
388db5c1eb3474699a4a2c98716da0537e3fc4db
Malware family:
AgentTesla.v4
Verdict:
Malicious
Please note that we are no longer able to provide a coverage score for Virus Total.

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:MSIL_TinyDownloader_Generic
Author:albertzsigovits
Description:Detects small-sized dotNET downloaders
Rule name:NET
Author:malware-lu
Rule name:NETexecutableMicrosoft
Author:malware-lu
Rule name:pe_imphash
Rule name:Skystars_Malware_Imphash
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 b3be1fe7098ff321491612d574fa9b51205e823f9883abe7f234aaa39f0a32bd

(this sample)

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