MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c3ef21643a3bafe4a9b6a2378d45e71af68de9fa78fd2d659619e17c7cf6c937. 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: 13


Intelligence 13 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: c3ef21643a3bafe4a9b6a2378d45e71af68de9fa78fd2d659619e17c7cf6c937
SHA3-384 hash: a9a5b27a2805bd9b0971df20d92b6c35ee152bfd2c431b49576a0cf3b0c08fa985bc280d252a5a02524d7250e0747a14
SHA1 hash: e13532e118a7fb124ece4812ec16bb84431e07b8
MD5 hash: c2a4b173057bd8a9e303a4439f1fd01f
humanhash: cat-salami-orange-iowa
File name:Payment Slip.exe
Download: download sample
Signature AgentTesla
Create hunting rule
File size:298'496 bytes
First seen:2023-08-24 13:20:16 UTC
Last seen:2023-08-29 05:28:24 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'748 x AgentTesla, 19'642 x Formbook, 12'245 x SnakeKeylogger)
ssdeep 6144:VuII2Zm2C3b4jDcolr8vFBGuEXJ6VcKl17SKYvZmNk7sJkj3Ma3HzyH0G:FI2ZmPr4jDco+dwuCJ6XSK8mK7Zj3D+H
TLSH T17254801BBA4FDDE1C1085B36C5CB530033E7DF92B7A3C60AB98D23D61A127AA9D05647
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 :
289
Origin country :
US US
Vendor Threat Intelligence
Malware family:
agenttesla
Create hunting rule
ID:
1
File name:
Payment Slip.exe
Verdict:
Malicious activity
Analysis date:
2023-08-24 13:23:44 UTC
Tags:
stealer agenttesla
Link:
https://app.any.run/tasks/01d5adfb-da76-4eab-ba67-151e7006fbbe

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/444528/
Detection(s):
SecuriteInfo.com.Win32.DropperX-gen.24965.4149.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Сreating synchronization primitives
DNS request
Sending a custom TCP request
Sending an HTTP GET request
Launching a process
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
control lolbin masquerade packed
Link:
https://www.filescan.io/uploads/64e7593fac089eb812466e26/reports/674c8811-31f9-49b2-a7ec-7929bdfaa445/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/c3ef21643a3bafe4a9b6a2378d45e71af68de9fa78fd2d659619e17c7cf6c937
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.
Verdict:
Suspicious
Link:
https://analyze.intezer.com/analyses/bdf1caf7-1a7b-49bb-bfa0-43a90af43ef4
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
spre.troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1296686
Signature
.NET source code contains potential unpacker
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Found malware configuration
Initial sample is a PE file and has a suspicious name
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 has a suspicious name (potential lure to open the executable)
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 Costura Assembly Loader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1296686 Sample: Payment_Slip.exe Startdate: 24/08/2023 Architecture: WINDOWS Score: 100 49 Found malware configuration 2->49 51 Antivirus / Scanner detection for submitted sample 2->51 53 Multi AV Scanner detection for submitted file 2->53 55 8 other signatures 2->55 6 Payment_Slip.exe 16 5 2->6         started        11 Yeobzfliffy.exe 14 5 2->11         started        13 Yeobzfliffy.exe 4 2->13         started        process3 dnsIp4 27 files.catbox.moe 108.181.20.35, 443, 49716, 49723 ASN852CA Canada 6->27 25 C:\Users\user\AppData\...\Yeobzfliffy.exe, PE32 6->25 dropped 57 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 6->57 59 Writes to foreign memory regions 6->59 61 Injects a PE file into a foreign processes 6->61 15 MSBuild.exe 14 2 6->15         started        19 MSBuild.exe 6->19         started        63 Antivirus detection for dropped file 11->63 65 Multi AV Scanner detection for dropped file 11->65 67 Machine Learning detection for dropped file 11->67 21 MSBuild.exe 11->21         started        23 MSBuild.exe 13->23         started        file5 signatures6 process7 dnsIp8 29 mail.sirisexpress.com 23.106.253.14, 49718, 49737, 49746 LEASEWEB-APAC-SIN-11LeasewebAsiaPacificpteltdSG Singapore 15->29 31 api4.ipify.org 173.231.16.76, 443, 49717, 49736 WEBNXUS United States 15->31 37 2 other IPs or domains 15->37 39 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 19->39 41 May check the online IP address of the machine 19->41 33 api.ipify.org 21->33 35 api.ipify.org 23->35 43 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 23->43 45 Tries to steal Mail credentials (via file / registry access) 23->45 47 Tries to harvest and steal browser information (history, passwords, etc) 23->47 signatures9
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/c3ef21643a3bafe4a9b6a2378d45e71af68de9fa78fd2d659619e17c7cf6c937/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2023-08-24 00:39:33 UTC
File Type:
PE (.Net Exe)
Extracted files:
3
AV detection:
25 of 37 (67.57%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ypxsczb2hox6jknwui3y2rphdl3i32p2pd6s2zmwdhqxy7hwze3q._file
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
family:agenttesla keylogger persistence spyware stealer trojan
Link:
https://tria.ge/reports/230824-qlmyhscg43/
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
AgentTesla
Unpacked files
SH256 hash:
c3ef21643a3bafe4a9b6a2378d45e71af68de9fa78fd2d659619e17c7cf6c937
MD5 hash:
c2a4b173057bd8a9e303a4439f1fd01f
SHA1 hash:
e13532e118a7fb124ece4812ec16bb84431e07b8
Link:
https://www.unpac.me/results/e46f1b87-6706-4f1f-a727-b74dc763e8ea/
Malware family:
AgentTesla.v4
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/c3ef21643a3b/report/overview.html
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/c3ef21643a3bafe4a9b6a2378d45e71af68de9fa78fd2d659619e17c7cf6c937

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:NET
Create hunting rule
Author:malware-lu
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

rar 807ce302c8759f8603a020f4a47e7a76fbc450e00f4645969243bd80a69af1c6

AgentTesla

Executable exe c3ef21643a3bafe4a9b6a2378d45e71af68de9fa78fd2d659619e17c7cf6c937

(this sample)

  
Delivery method
Other
Cape
Cape
https://www.capesandbox.com/analysis/444528/
  
Dropped by
SHA256 807ce302c8759f8603a020f4a47e7a76fbc450e00f4645969243bd80a69af1c6
  
Dropped by
MD5 2aef1f3de951f64b124e77f556497280

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