MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 7a61df23e0402188ffbcd17806396f8e71d86e4aae0ae57a3d70a4b83195c01b. 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: 7a61df23e0402188ffbcd17806396f8e71d86e4aae0ae57a3d70a4b83195c01b
SHA3-384 hash: 10561f77e1c5f821061da76366f210d98759678fe4ab89c882c0279d7edcc424d5415d081589fc0f7260bee18bab7d35
SHA1 hash: 6ea558c36a648be3bab233c48f54f616c69c3b72
MD5 hash: 621136078b9cb88baedf74ea1a0de338
humanhash: video-don-queen-cup
File name:revised invoice.exe
Download: download sample
Signature AgentTesla
Create hunting rule
File size:1'123'840 bytes
First seen:2020-08-03 15:08:04 UTC
Last seen:2020-08-03 16:03:01 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'462 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 24576:phJjsJ/34c7vdHXEuhMom9kMyYwyW5DJHjGpV:prQ34c7Dhlm9nDe5Ddy
Threatray 837 similar samples on MalwareBazaar
TLSH 5935F05CBB90856AF55B1F7E9C7694439D34F80BA827E38F29F1122C047A79CA811F63
Reporter abuse_ch
Tags:AgentTesla exe


Avatar
abuse_ch
Malspam distributing AgentTesla:

HELO: nathaninc.com
Sending IP: 103.99.1.146
From: kthaungzaw <kthaungzaw@nathaninc.com>
Subject: RE: Revised invoice
Attachment: revised invoice.zip (contains "revised invoice.exe")

AgentTesla SMTP exfil server:
mail.amexworldwide.com:587

Intelligence

File Origin
# of uploads :
2
# of downloads :
88
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/38016/
Detection(s):
SecuriteInfo.com.Fareit-FXU621136078B9C.13225.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Launching a process
Creating a file
Unauthorized injection to a system process
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
96 / 100
Link:
https://www.joesandbox.com/analysis/408199
Signature
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
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)
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)
Writes to foreign memory regions
Yara detected AgentTesla
Yara detected AntiVM_3
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 256340 Sample: revised invoice.exe Startdate: 03/08/2020 Architecture: WINDOWS Score: 96 36 Yara detected AgentTesla 2->36 38 Yara detected AntiVM_3 2->38 40 Machine Learning detection for sample 2->40 42 2 other signatures 2->42 7 revised invoice.exe 3 2->7         started        11 BAVLA.exe 4 2->11         started        13 BAVLA.exe 3 2->13         started        process3 file4 28 C:\Users\user\...\revised invoice.exe.log, ASCII 7->28 dropped 44 Writes to foreign memory regions 7->44 46 Injects a PE file into a foreign processes 7->46 15 dllhost.exe 7->15         started        17 RegSvcs.exe 3 7->17         started        20 conhost.exe 11->20         started        22 conhost.exe 13->22         started        signatures5 process6 signatures7 24 RegSvcs.exe 2 6 15->24         started        32 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 17->32 34 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 17->34 process8 file9 30 C:\Users\user\AppData\Roaming\...\BAVLA.exe, PE32 24->30 dropped 48 Tries to steal Mail credentials (via file access) 24->48 50 Tries to harvest and steal browser information (history, passwords, etc) 24->50 52 Hides that the sample has been downloaded from the Internet (zone.identifier) 24->52 signatures10
Detection:
agenttesla
Create hunting rule
Link:
https://mwdb.cert.pl/sample/7a61df23e0402188ffbcd17806396f8e71d86e4aae0ae57a3d70a4b83195c01b/
Threat name:
ByteCode-MSIL.Trojan.Kryptik
Create hunting rule
Status:
Malicious
First seen:
2020-08-03 15:09:11 UTC
AV detection:
22 of 29 (75.86%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=pjq56i7aiaqyr7542f4amolprzy5q3skvyfok6r5ocslqmmvyanq._file
Verdict:
malicious
Similar samples:
1b476c8bd4604f9eb16f852bd2a7770520789b8740195c32b30f68dcfc9e91e9
AgentTesla
23238fe2dfccd6e140916ab34d11a4b42b84f485e02c102c58b696a11bd3e453
AgentTesla
4f965aee8b694528d2d11d5a80eeee466959650ffcd12b5f0fc28d3a11709e27
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5a5ee7a7accc9dea18429c75f62db226599e96d50cdf5f1fec7d5e40881278b2
AgentTesla
6cb4b1c8e7a9db252978470e2971438bc9cb1e4036c6dfdeec7229af1f7d56b8
AgentTesla
6f2ed9ee33724651d7fb52edc4dbb3bfde3c19ca12cf5e990952d392305d1c20
AgentTesla
c523252072f5911950614d6a91d16036b0128c10458f05a4ab0b7a3221780c1a
AgentTesla
d1d753678c6c2a9e8957c508adc44ccd35c79592a826e973528ec146f33d558c
AgentTesla
ec0f65afbe2adb5bccb4d4b0fa58353791deb99e42a2583828442a68af1cd235
AgentTesla
ef47e6b46e818e6f3110202391cca1ba74b312d9e2d11dd66e62b59c60b49cda
AgentTesla
+ 827 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/200803-1ajmhkarss/
Behaviour
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
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/7a61df23e0402188ffbcd17806396f8e71d86e4aae0ae57a3d70a4b83195c01b

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

zip 04e46a9b3d8a5059ef6005a0d89d2324871b0a73e50c798c051d84f8bd8a4178

AgentTesla

Executable exe 7a61df23e0402188ffbcd17806396f8e71d86e4aae0ae57a3d70a4b83195c01b

(this sample)

  
Dropped by
MD5 b2db26cfd3193a5d65218a87818fe05e
  
Delivery method
Distributed via e-mail attachment
  
Dropped by
SHA256 04e46a9b3d8a5059ef6005a0d89d2324871b0a73e50c798c051d84f8bd8a4178
Cape
Cape
https://www.capesandbox.com/analysis/38016/

Comments