MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 1631bd051bd9ef096e2cd29bba5c549e8b4028dc9de457c2bd5ee060c69a7e6a. 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: 8


Intelligence 8 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 1631bd051bd9ef096e2cd29bba5c549e8b4028dc9de457c2bd5ee060c69a7e6a
SHA3-384 hash: 8fe5edb90287495107d820ccba97f7867f4149fe1191a030e1519e1a6f2b15b541b03341c3c16c954878d14adf315fe0
SHA1 hash: 17db333914cfeddabc5c7ab0b359d5ccebfe6f09
MD5 hash: 3ecd7b16cf441354ab7c4bcea3971783
humanhash: robin-coffee-stairway-comet
File name:SKM_C3350191107102300.exe
Download: download sample
Signature AgentTesla
Create hunting rule
File size:534'016 bytes
First seen:2020-08-14 09:52:17 UTC
Last seen:2020-08-14 13:08:43 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'649 x AgentTesla, 19'461 x Formbook, 12'202 x SnakeKeylogger)
ssdeep 6144:tXnjjRrYrjuPrlynBu0GbIug0EVuBPeJtJiHSCTFcFv7pHJBoODyJZT8IS5EGL/n:NnjURnBx05BYCTgBbI8IS5EaNeszd3G
Threatray 10'531 similar samples on MalwareBazaar
TLSH B9B4F17E12F2E808C07BF53D8159618BB0E79C5B10A5D70AA9DD0DD81E281E75AF2CF9
Reporter abuse_ch
Tags:AgentTesla exe


Avatar
abuse_ch
Malspam distributing AgentTesla:

HELO: vps193.pairvps.com
Sending IP: 66.39.65.125
From: Kristine Noveno <info@orglogistics.com>
Subject: ADVANCE FREIGHT USD INV#1191189
Attachment: SKM_C3350191107102300.rar (contains "SKM_C3350191107102300.exe")

AgentTesla SMTP exfil server:
smtp.yandex.ru:587

Intelligence

File Origin
# of uploads :
3
# of downloads :
75
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/45749/
Detection(s):
SecuriteInfo.com.Trojan.PWS.Siggen2.53440.21861.32704.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Creating a file in the %AppData% directory
Creating a file in the %temp% directory
Launching a process
Creating a process with a hidden window
Deleting a recently created file
Unauthorized injection to a recently created process
Creating a file
Using the Windows Management Instrumentation requests
Enabling autorun by creating a file
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/429288
Signature
.NET source code contains potential unpacker
Binary contains a suspicious time stamp
Hides that the sample has been downloaded from the Internet (zone.identifier)
Injects a PE file into a foreign processes
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: Scheduled temp file as task from temp location
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 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: 267123 Sample: SKM_C3350191107102300.exe Startdate: 15/08/2020 Architecture: WINDOWS Score: 100 49 Sigma detected: Scheduled temp file as task from temp location 2->49 51 Yara detected AgentTesla 2->51 53 Yara detected AntiVM_3 2->53 55 4 other signatures 2->55 7 SKM_C3350191107102300.exe 7 2->7         started        11 BAVLA.exe 5 2->11         started        13 BAVLA.exe 4 2->13         started        process3 file4 35 C:\Users\user\AppData\Local\...\tmp5E30.tmp, XML 7->35 dropped 37 C:\Users\user\AppData\Roaming\kmlyxHr.exe, PE32 7->37 dropped 57 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 7->57 59 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 7->59 61 Injects a PE file into a foreign processes 7->61 15 SKM_C3350191107102300.exe 2 7 7->15         started        19 schtasks.exe 1 7->19         started        21 BAVLA.exe 4 11->21         started        23 schtasks.exe 1 11->23         started        25 schtasks.exe 13->25         started        27 BAVLA.exe 13->27         started        signatures5 process6 file7 39 C:\Users\user\AppData\Roaming\...\BAVLA.exe, PE32 15->39 dropped 41 C:\Users\user\...\BAVLA.exe:Zone.Identifier, ASCII 15->41 dropped 43 Tries to steal Mail credentials (via file access) 15->43 45 Hides that the sample has been downloaded from the Internet (zone.identifier) 15->45 29 conhost.exe 19->29         started        47 Tries to harvest and steal browser information (history, passwords, etc) 21->47 31 conhost.exe 23->31         started        33 conhost.exe 25->33         started        signatures8 process9
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/1631bd051bd9ef096e2cd29bba5c549e8b4028dc9de457c2bd5ee060c69a7e6a/
Threat name:
ByteCode-MSIL.Trojan.Kryptik
Create hunting rule
Status:
Malicious
First seen:
2020-08-14 09:54:08 UTC
File Type:
PE (.Net Exe)
Extracted files:
3
AV detection:
23 of 29 (79.31%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=cyy32bi33hxqs3rm2kn3uxcut2fuakg4txsfpqv5l3qgbru2pzva._file
Verdict:
malicious
Label(s):
agenttesla
Create hunting rule
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+ 10'521 additional samples on MalwareBazaar
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
keylogger stealer persistence spyware trojan family:agenttesla
Link:
https://tria.ge/reports/200814-e76nz5zkms/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Adds Run key to start application
Reads user/profile data of local email clients
Reads user/profile data of web browsers
AgentTesla Payload
AgentTesla
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.87
Link:
https://yomi.yoroi.company/submissions/1631bd051bd9ef096e2cd29bba5c549e8b4028dc9de457c2bd5ee060c69a7e6a

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: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

rar 51004572124d5de01dc7795e6154ddd19192e78edf63d2e3bf89d61316a1d0e6

AgentTesla

Executable exe 1631bd051bd9ef096e2cd29bba5c549e8b4028dc9de457c2bd5ee060c69a7e6a

(this sample)

  
Dropped by
MD5 3bc83d4d20986c786c2a52bdd14832dd
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/45749/
  
Dropped by
SHA256 51004572124d5de01dc7795e6154ddd19192e78edf63d2e3bf89d61316a1d0e6

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