MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a5a2748fa5b4e8ec996c3a400fa9250c3172ce43e3c8dbae8d26f825566d8d07. 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 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a5a2748fa5b4e8ec996c3a400fa9250c3172ce43e3c8dbae8d26f825566d8d07
SHA3-384 hash: e483813404561245f9be461402a843ac940c3f84b875299822eb02b9b7c0f93b74988748833d77bf07a38e695d4fa402
SHA1 hash: 48c9a25a3ef4cdee79225ba253b7fdb3d5e6497a
MD5 hash: 469e36cf8c1be6db91faa569b67b7d80
humanhash: utah-ack-mockingbird-sink
File name:Official purchase order (PO.40295380).exe
Download: download sample
Signature AgentTesla
Create hunting rule
File size:629'248 bytes
First seen:2020-07-29 12:46:29 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'462 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 12288:bUWmTsMpwKJckDX5mGrj4CXK4S9Pl51SA68a2afBJAk1LfYcwuVaeJi:AWkwEvUGdral5i+W7WuHo
Threatray 10'504 similar samples on MalwareBazaar
TLSH C0D4D01ABA91ED16C2FE8579E6DC1519CEFC8182A12BF715685193BF19C23B3DC403B2
Reporter abuse_ch
Tags:AgentTesla exe


Avatar
abuse_ch
Malspam distributing AgentTesla:

HELO: srv.idxdnszone107.com
Sending IP: 54.36.51.187
From: Lívia Géczyová <sales@kimex-bg.com>
Subject: RE:Official purchase order (PO.4029530)
Attachment: Official purchase order PO.40295380.arj (contains "Official purchase order (PO.40295380).exe")

AgentTesla SMTP exfil server:
us2.smtp.mailhostbox.com:587

Intelligence

File Origin
# of uploads :
1
# of downloads :
75
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/34890/
Detection(s):
SecuriteInfo.com.MSIL.Kryptik.VFR-1.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
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
Creating a file in the %AppData% subdirectories
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Moving of the original file
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/402556
Signature
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
Moves itself to temp directory
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 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 dnsIp2 2 Behavior Graph ID: 253643 Sample: Official purchase order (PO... Startdate: 29/07/2020 Architecture: WINDOWS Score: 100 43 g.msn.com 2->43 45 asf-ris-prod-neurope.northeurope.cloudapp.azure.com 2->45 59 Found malware configuration 2->59 61 Sigma detected: Scheduled temp file as task from temp location 2->61 63 Yara detected AgentTesla 2->63 65 6 other signatures 2->65 8 Official purchase order (PO.40295380).exe 5 2->8         started        12 YYtJku.exe 1 2->12         started        14 YYtJku.exe 2->14         started        signatures3 process4 file5 37 C:\Users\user\AppData\Local\...\tmpD68F.tmp, XML 8->37 dropped 39 C:\Users\user\AppData\...\&startupname&.exe, PE32 8->39 dropped 67 Injects a PE file into a foreign processes 8->67 16 Official purchase order (PO.40295380).exe 2 5 8->16         started        21 schtasks.exe 1 8->21         started        23 Official purchase order (PO.40295380).exe 8->23         started        25 Official purchase order (PO.40295380).exe 8->25         started        69 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 12->69 71 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 12->71 27 YYtJku.exe 2 12->27         started        29 YYtJku.exe 14->29         started        signatures6 process7 dnsIp8 41 us2.smtp.mailhostbox.com 208.91.199.224, 49753, 49756, 587 PUBLIC-DOMAIN-REGISTRYUS United States 16->41 33 C:\Users\user\AppData\Roaming\...\YYtJku.exe, PE32 16->33 dropped 35 C:\Users\user\...\YYtJku.exe:Zone.Identifier, ASCII 16->35 dropped 47 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 16->47 49 Moves itself to temp directory 16->49 51 Tries to steal Mail credentials (via file access) 16->51 31 conhost.exe 21->31         started        53 Tries to harvest and steal ftp login credentials 27->53 55 Tries to harvest and steal browser information (history, passwords, etc) 27->55 57 Hides that the sample has been downloaded from the Internet (zone.identifier) 27->57 file9 signatures10 process11
Detection:
agenttesla
Create hunting rule
Link:
https://mwdb.cert.pl/sample/a5a2748fa5b4e8ec996c3a400fa9250c3172ce43e3c8dbae8d26f825566d8d07/
Threat name:
ByteCode-MSIL.Trojan.Kryptik
Create hunting rule
Status:
Malicious
First seen:
2020-07-29 12:48:09 UTC
AV detection:
24 of 29 (82.76%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=uwrhjd5fwtuozglmhjaa7kjfbqyxftsd4penxlune34ckvtnrudq._file
Verdict:
malicious
Label(s):
agenttesla
Create hunting rule
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AgentTesla
+ 10'494 additional samples on MalwareBazaar
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
persistence spyware keylogger trojan stealer family:agenttesla
Link:
https://tria.ge/reports/200729-hpwmfahfnx/
Behaviour
Creates scheduled task(s)
Suspicious behavior: RenamesItself
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Adds Run key to start application
Reads user/profile data of web browsers
Reads user/profile data of local email clients
Reads data files stored by FTP clients
AgentTesla
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Kryptik
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/a5a2748fa5b4e8ec996c3a400fa9250c3172ce43e3c8dbae8d26f825566d8d07

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

arj 560524acba826c997586ab2d9f5c164dccb710ff7714759300862c79450d68ba

AgentTesla

Executable exe a5a2748fa5b4e8ec996c3a400fa9250c3172ce43e3c8dbae8d26f825566d8d07

(this sample)

  
Dropped by
MD5 303e5e65ebf2e40c8a1ae493231847c1
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/34890/
  
Dropped by
SHA256 560524acba826c997586ab2d9f5c164dccb710ff7714759300862c79450d68ba

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