MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 1c94475216a36fd670d2d6512f4a4347f809847a0491b768f81fa33fa00ccc83. 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


Intelligence File information Yara 3 Comments

SHA256 hash: 1c94475216a36fd670d2d6512f4a4347f809847a0491b768f81fa33fa00ccc83
SHA3-384 hash: 091cab3ce7d5191faad2623190dc0b44eeb6cee99952b42d746f1afe3bdf3c9a4a6844262b6b6877131fad4a03b257ee
SHA1 hash: 319b970b907626efe7be298a0c21c52f254cd311
MD5 hash: c5e7345ea96addff57be87be8b772090
humanhash: monkey-fillet-finch-neptune
File name:Universal310720.exe
Download: download sample
Signature AgentTesla
File size:501'760 bytes
First seen:2020-07-31 12:16:04 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744
ssdeep 12288:0HuZEaQhfABPEMLat704kTJ/1+3xhlE4V28ypQsgmzhdf:0Hu6aQhEOoy3ZV3m
TLSH 20B4D08CB0EA151BF41671BE8FF981ABCE66F46F1192462B567560D7807CB182EC0F72
Reporter @abuse_ch
Tags:AgentTesla exe


Twitter
@abuse_ch
Malspam distributing AgentTesla:

HELO: abaad.om
Sending IP: 37.49.230.200
From: Syamkumar Korat <syam.kumar@abaad.om>
Subject: Bank Transfer Advice
Attachment: Universal310720.Z (contains "Universal310720.exe")

Intelligence


File Origin
# of uploads :
1
# of downloads :
39
Origin country :
FR FR
Mail intelligence
Geo location:
IT Italy
Volume:
Low
Geo location:
Global
Volume:
Low
Vendor Threat Intelligence
Gathering data
Result
Threat name:
AgentTesla
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Signature
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
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)
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)
Yara detected AgentTesla
Yara detected AntiVM_3
Behaviour
Behavior Graph:
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 255369 Sample: Universal310720.exe Startdate: 31/07/2020 Architecture: WINDOWS Score: 100 30 g.msn.com 2->30 32 asf-ris-prod-neurope.northeurope.cloudapp.azure.com 2->32 48 Found malware configuration 2->48 50 Yara detected AgentTesla 2->50 52 Yara detected AntiVM_3 2->52 54 2 other signatures 2->54 7 YYtJku.exe 3 2->7         started        10 Universal310720.exe 3 2->10         started        13 YYtJku.exe 2 2->13         started        signatures3 process4 file5 56 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 7->56 58 Machine Learning detection for dropped file 7->58 60 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 7->60 62 Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent) 7->62 15 YYtJku.exe 2 7->15         started        28 C:\Users\user\...\Universal310720.exe.log, ASCII 10->28 dropped 64 Injects a PE file into a foreign processes 10->64 19 Universal310720.exe 2 5 10->19         started        22 YYtJku.exe 13->22         started        signatures6 process7 dnsIp8 36 Tries to harvest and steal ftp login credentials 15->36 38 Tries to harvest and steal browser information (history, passwords, etc) 15->38 40 Hides that the sample has been downloaded from the Internet (zone.identifier) 15->40 34 mail.transfastc.com 108.167.160.43, 49738, 49740, 587 UNIFIEDLAYER-AS-1US United States 19->34 24 C:\Users\user\AppData\Roaming\...\YYtJku.exe, PE32 19->24 dropped 26 C:\Users\user\...\YYtJku.exe:Zone.Identifier, ASCII 19->26 dropped 42 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 19->42 44 Moves itself to temp directory 19->44 46 Tries to steal Mail credentials (via file access) 19->46 file9 signatures10
Threat name:
ByteCode-MSIL.Trojan.Kryptik
Status:
Malicious
First seen:
2020-07-31 12:17:07 UTC
AV detection:
23 of 31 (74.19%)
Threat level
  5/5
Result
Malware family:
agenttesla
Score:
  10/10
Tags:
keylogger stealer trojan spyware family:agenttesla persistence
Behaviour
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Suspicious behavior: RenamesItself
Suspicious use of SetThreadContext
Adds Run key to start application
Reads data files stored by FTP clients
Reads user/profile data of web browsers
Reads user/profile data of local email clients
AgentTesla Payload
AgentTesla
Threat name:
Suspicious File
Score:
0.45

Yara Signatures


Rule name:Agenttesla_type2
Author:JPCERT/CC Incident Response Group
Description:detect Agenttesla in memory
Reference:internal research
Rule name:CAP_HookExKeylogger
Author:Brian C. Bell -- @biebsmalwareguy
Reference:https://github.com/DFIRnotes/rules/blob/master/CAP_HookExKeylogger.yar
Rule name:win_agent_tesla_w1
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

Executable exe 1c94475216a36fd670d2d6512f4a4347f809847a0491b768f81fa33fa00ccc83

(this sample)

  
Delivery method
Distributed via e-mail attachment

Comments