MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 71092eb5645b856eb427bd3e1a933e9dad248e3a95216017d944b3b6693ff5f1. 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: 7


Intelligence 7 IOCs YARA 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 71092eb5645b856eb427bd3e1a933e9dad248e3a95216017d944b3b6693ff5f1
SHA3-384 hash: a9ae73e56b2a35a1c8bc4d096e8556bf6424e62132a49d9a889b2dd09a9ff193d79a1b2e0540298cab141db8694f1d33
SHA1 hash: fcb7399a5947b49b6a960dd8ce2c4505ded11c79
MD5 hash: d73a6549419760c672e5ad62463b682a
humanhash: earth-edward-zebra-skylark
File name:付款确认23102020_doc0079868.exe
Download: download sample
Signature AgentTesla
Create hunting rule
File size:1'146'880 bytes
First seen:2020-10-23 06:49:56 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'749 x AgentTesla, 19'653 x Formbook, 12'246 x SnakeKeylogger)
ssdeep 24576:PdgN4viAk7GFbZPBn7KCCyqu62Yk8E7zIx6fg:Vk4/k7G9pB7KCvqu62Yk8Enk+
TLSH 82358B03B1ACCB1EE2B907B1E43415F547A92E67E529E29B3CD2BCDD3532B085911AD3
Reporter abuse_ch
Tags:AgentTesla exe


Avatar
abuse_ch
Malspam distributing AgentTesla:

HELO: yml.com.cn
Sending IP: 45.137.22.86
From: YMTAO-QBAB Nancy. Gao/高景华 <Qinb@yml.com.cn>
Subject: 付款确认23102020 (MSG) Ref:20201023MT103 Swift// TOP URGENT
Attachment: 付款确认23102020_doc0079868.gz (contains "付款确认23102020_doc0079868.exe")

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

Intelligence

File Origin
# of uploads :
1
# of downloads :
87
Origin country :
n/a
Vendor Threat Intelligence
Detection(s):
SecuriteInfo.com.Trojan.PWS.Siggen2.58050.19745.19201.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a UDP request
Creating a window
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
Reading critical registry keys
Stealing user critical data
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/507820
Signature
Found evasive API chain (trying to detect sleep duration tampering with parallel thread)
Found malware configuration
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
Multi AV Scanner detection for submitted file
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 signatures2 2 Behavior Graph ID: 303035 Sample: #U4ed8#U6b3e#U786e#U8ba4231... Startdate: 23/10/2020 Architecture: WINDOWS Score: 100 31 Found malware configuration 2->31 33 Sigma detected: Scheduled temp file as task from temp location 2->33 35 Multi AV Scanner detection for submitted file 2->35 37 5 other signatures 2->37 7 #U4ed8#U6b3e#U786e#U8ba423102020_doc0079868.exe 6 2->7         started        process3 file4 21 C:\Users\user\AppData\Local\...\tmpEA55.tmp, XML 7->21 dropped 23 #U4ed8#U6b3e#U786e..._doc0079868.exe.log, ASCII 7->23 dropped 25 C:\Users\user\AppData\Roaming\KeyzZXz.exe, PE32 7->25 dropped 39 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 7->39 41 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 7->41 43 Injects a PE file into a foreign processes 7->43 45 Found evasive API chain (trying to detect sleep duration tampering with parallel thread) 7->45 11 #U4ed8#U6b3e#U786e#U8ba423102020_doc0079868.exe 4 7->11         started        15 schtasks.exe 1 7->15         started        17 #U4ed8#U6b3e#U786e#U8ba423102020_doc0079868.exe 7->17         started        signatures5 process6 dnsIp7 27 alandalustobacco.com 154.16.116.113, 49717, 587 AS-COLOCROSSINGUS South Africa 11->27 29 mail.alandalustobacco.com 11->29 47 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 11->47 49 Tries to steal Mail credentials (via file access) 11->49 51 Tries to harvest and steal ftp login credentials 11->51 53 Tries to harvest and steal browser information (history, passwords, etc) 11->53 19 conhost.exe 15->19         started        signatures8 process9
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/71092eb5645b856eb427bd3e1a933e9dad248e3a95216017d944b3b6693ff5f1/
Threat name:
ByteCode-MSIL.Spyware.Noon
Create hunting rule
Status:
Malicious
First seen:
2020-10-23 01:47:13 UTC
AV detection:
24 of 29 (82.76%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=oees5nlelocw5nbhxu7bvez6twwsjdr2suqwaf6zisz3m2j76xyq._file
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
keylogger stealer spyware trojan family:agenttesla
Link:
https://tria.ge/reports/201023-1bsr13jh6e/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Reads data files stored by FTP clients
Reads user/profile data of local email clients
Reads user/profile data of web browsers
AgentTesla Payload
AgentTesla
Unpacked files
SH256 hash:
71092eb5645b856eb427bd3e1a933e9dad248e3a95216017d944b3b6693ff5f1
MD5 hash:
d73a6549419760c672e5ad62463b682a
SHA1 hash:
fcb7399a5947b49b6a960dd8ce2c4505ded11c79
Link:
https://www.unpac.me/results/1a986c67-f16a-4ceb-b12d-f8f7fc69c701/
SH256 hash:
31ce938626ccfb399fe1696710caf46d7ae9eb598b9d7d2aad719b594658469b
MD5 hash:
0aebe46040ceb011e78506d4985fe3de
SHA1 hash:
218ac1e7b14a66c604ec3042f8486bed9cd4c2c1
Link:
https://www.unpac.me/results/1a986c67-f16a-4ceb-b12d-f8f7fc69c701/
SH256 hash:
fb01c995a60ebd0fe9ca23a8a5b0bb3dd07e8588b6a7717278f3e6d9f51c507a
MD5 hash:
bd25fea0440080d110743e42c96dccfd
SHA1 hash:
2a9c855ca8ef84a4cd6ee40273de784ba2f212d3
Link:
https://www.unpac.me/results/1a986c67-f16a-4ceb-b12d-f8f7fc69c701/
SH256 hash:
95e169c29e83f805aea1f1d7fe5ccac18a7fe6f57ae15be94a7b175f886309d5
MD5 hash:
c976635507a55f13f15494a3d35592bc
SHA1 hash:
4cada10376b5cb064c372e73bee3860689f236e7
Detections:
win_agent_tesla_w1
Create hunting rule
Link:
https://www.unpac.me/results/1a986c67-f16a-4ceb-b12d-f8f7fc69c701/
Please note that we are no longer able to provide a coverage score for Virus Total.

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_extracted_bin
Create hunting rule
Author:James_inthe_box
Description:AgentTesla extracted
Rule name:AgentTesla_mod_tough_bin
Create hunting rule
Author:James_inthe_box
Reference:https://app.any.run/tasks/3b5d409c-978b-4a95-a5f1-399f0216873d/
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_g2
Create hunting rule
Author:Daniel Plohmann <daniel.plohmann@fkie.fraunhofer.de>
Rule name:win_agent_tesla_v1
Create hunting rule
Author:Johannes Bader @viql
Description:detects Agent Tesla
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

gz f6099044c73044fadef6fb9dc12fecb726f011a4244299d72798210474bda6e9

AgentTesla

Executable exe 71092eb5645b856eb427bd3e1a933e9dad248e3a95216017d944b3b6693ff5f1

(this sample)

  
Dropped by
MD5 00aa23822fd57c453caf723d66827ec0
  
Delivery method
Distributed via e-mail attachment
  
Dropped by
SHA256 f6099044c73044fadef6fb9dc12fecb726f011a4244299d72798210474bda6e9

Comments