MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a8555a92210e43800749892044a20d6f694c17255f6934fcecc73e1bc273663c. 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: a8555a92210e43800749892044a20d6f694c17255f6934fcecc73e1bc273663c
SHA3-384 hash: e4806b9b30fc07a7c9fd141fa093928d2427f4a9d64653dd09397ef71dacb82c9bfa36d858b9f49e0bb1025cc995fdc0
SHA1 hash: 1abe58fa31cfdf4460b6cdb2e63999bcba3b1fa2
MD5 hash: a24b9d0368332d37d0919f53cc9aabd4
humanhash: tango-india-utah-uncle
File name:ROH_3731979900_F37300007047_000_00_pdf.exe
Download: download sample
Signature AgentTesla
Create hunting rule
File size:418'816 bytes
First seen:2020-08-05 08:05:07 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:lxxUWhUhHip12IGFF1fi06/NcV8zpmPokfWf7M/:lMW0CCJq06/+VApu6M/
Threatray 10'613 similar samples on MalwareBazaar
TLSH 179412BC16994AA7F16A0ABF4C710203DDA7C91F2125D6CF2F712099563D26D3E81FB2
Reporter abuse_ch
Tags:AgentTesla exe


Avatar
abuse_ch
Malspam distributing AgentTesla:

HELO: blinux.thesecurededicatedserver.com
Sending IP: 198.52.104.94
From: V-Arun.Mishra <VArun.Mishra@deltaww.com>
Subject: RFQ 20200804
Attachment: ROH_3731979900_F37300007047_000_00_pdf.rar (contains "ROH_3731979900_F37300007047_000_00_pdf.exe")

AgentTesla SMTP exfil server:
smtp.blueskypaclficgroup.com:587

Intelligence

File Origin
# of uploads :
1
# of downloads :
70
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/39157/
Detection(s):
SecuriteInfo.com.BackDoor.SpyBotNET.25.19861.31443.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
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/410487
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
Machine Learning detection for dropped file
Machine Learning detection for sample
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
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
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 signatures2 2 Behavior Graph ID: 257501 Sample: ROH_3731979900_F37300007047... Startdate: 05/08/2020 Architecture: WINDOWS Score: 100 68 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->68 70 Found malware configuration 2->70 72 Sigma detected: Scheduled temp file as task from temp location 2->72 74 7 other signatures 2->74 7 ROH_3731979900_F37300007047_000_00_pdf.exe 7 2->7         started        11 newapp.exe 4 2->11         started        13 newapp.exe 5 2->13         started        process3 file4 42 C:\Users\user\AppData\...\JQlaquLKtQsL.exe, PE32 7->42 dropped 44 C:\Users\...\JQlaquLKtQsL.exe:Zone.Identifier, ASCII 7->44 dropped 46 C:\Users\user\AppData\Local\...\tmp22ED.tmp, XML 7->46 dropped 48 ROH_3731979900_F37..._000_00_pdf.exe.log, ASCII 7->48 dropped 76 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 7->76 78 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 7->78 15 ROH_3731979900_F37300007047_000_00_pdf.exe 2 5 7->15         started        20 schtasks.exe 1 7->20         started        22 newapp.exe 11->22         started        24 schtasks.exe 11->24         started        26 newapp.exe 11->26         started        80 Machine Learning detection for dropped file 13->80 28 schtasks.exe 1 13->28         started        30 newapp.exe 13->30         started        signatures5 process6 dnsIp7 50 smtp.blueskypaclficgroup.com 15->50 52 us2.smtp.mailhostbox.com 208.91.199.223, 49746, 587 PUBLIC-DOMAIN-REGISTRYUS United States 15->52 38 C:\Users\user\AppData\Roaming\...\newapp.exe, PE32 15->38 dropped 40 C:\Users\user\...\newapp.exe:Zone.Identifier, ASCII 15->40 dropped 58 Hides that the sample has been downloaded from the Internet (zone.identifier) 15->58 32 conhost.exe 20->32         started        54 208.91.199.224, 49747, 587 PUBLIC-DOMAIN-REGISTRYUS United States 22->54 56 smtp.blueskypaclficgroup.com 22->56 60 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 22->60 62 Tries to steal Mail credentials (via file access) 22->62 64 Tries to harvest and steal ftp login credentials 22->64 66 Tries to harvest and steal browser information (history, passwords, etc) 22->66 34 conhost.exe 24->34         started        36 conhost.exe 28->36         started        file8 signatures9 process10
Detection:
agenttesla
Create hunting rule
Link:
https://mwdb.cert.pl/sample/a8555a92210e43800749892044a20d6f694c17255f6934fcecc73e1bc273663c/
Threat name:
ByteCode-MSIL.Trojan.Kryptik
Create hunting rule
Status:
Malicious
First seen:
2020-08-05 01:44:19 UTC
AV detection:
23 of 29 (79.31%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=vbkvverbbzbyab2jreqejiqnn5uuyfzfl5utj7hmy47bxqttmy6a._file
Verdict:
malicious
Label(s):
agenttesla
Create hunting rule
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AgentTesla
+ 10'603 additional samples on MalwareBazaar
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
keylogger stealer trojan spyware family:agenttesla persistence
Link:
https://tria.ge/reports/200805-hvj4ja9mg2/
Behaviour
Creates scheduled task(s)
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 Payload
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/a8555a92210e43800749892044a20d6f694c17255f6934fcecc73e1bc273663c

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 da61a1d4693ed5b711476b2ae76d7bd6f0a5fc03dc2a92f20622d3db6b8397b0

AgentTesla

Executable exe a8555a92210e43800749892044a20d6f694c17255f6934fcecc73e1bc273663c

(this sample)

  
Dropped by
MD5 9c33a9036fea4e73fdeec0b2012090fa
  
Delivery method
Distributed via e-mail attachment
  
Dropped by
SHA256 da61a1d4693ed5b711476b2ae76d7bd6f0a5fc03dc2a92f20622d3db6b8397b0
Cape
Cape
https://www.capesandbox.com/analysis/39157/

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