MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 91e478af0d259a398a1f018da401190e09bb38ee5c15647f4c97a35c43d9800c. 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: 91e478af0d259a398a1f018da401190e09bb38ee5c15647f4c97a35c43d9800c
SHA3-384 hash: d8406795ebb5dbee6ea07f008c1600e8b0f3584b1a2a4ea0b089c5cf15fe488e0cc8d3000591d93199ede9951788cea5
SHA1 hash: 28fad354b7d8dca874b49c68616401562075009f
MD5 hash: 7db674d183d49e66982dde6217ae2213
humanhash: cold-papa-early-delta
File name:wire payment.exe
Download: download sample
Signature AgentTesla
Create hunting rule
File size:532'480 bytes
First seen:2020-08-07 13:27:34 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:UdNsHmgrpiAMmHlMotEsS6mCdnpDx7W6LiwykZwpbMS:UW7QAMmSxsHmCddx7LOd
Threatray 10'967 similar samples on MalwareBazaar
TLSH F7B4D06876ACB79EC5EB8E79897C3C009631B8275A2BE307A587215D4D1DBC58E007F3
Reporter abuse_ch
Tags:AgentTesla exe


Avatar
abuse_ch
Malspam distributing AgentTesla:

HELO: jknet.com
Sending IP: 37.49.230.200
From: "David Cooper" <matheus@jknet.com>
Subject: Wire Payment
Attachment: wire payment.Z (contains "wire payment.exe")

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

Intelligence

File Origin
# of uploads :
1
# of downloads :
77
Origin country :
n/a
Vendor Threat Intelligence
Detection:
AgentTeslaV2
Create hunting rule
Link:
https://www.capesandbox.com/analysis/41658/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a UDP request
Creating a window
Unauthorized injection to a recently created process
Creating a file
Using the Windows Management Instrumentation requests
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/415324
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)
Initial sample is a PE file and has a suspicious name
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:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 259921 Sample: wire payment.exe Startdate: 07/08/2020 Architecture: WINDOWS Score: 100 33 Found malware configuration 2->33 35 Yara detected AgentTesla 2->35 37 Yara detected AntiVM_3 2->37 39 6 other signatures 2->39 6 YYtJku.exe 3 2->6         started        9 wire payment.exe 3 2->9         started        12 YYtJku.exe 2 2->12         started        process3 file4 41 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 6->41 43 Machine Learning detection for dropped file 6->43 45 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 6->45 14 YYtJku.exe 2 6->14         started        27 C:\Users\user\...\wire payment.exe.log, ASCII 9->27 dropped 47 Injects a PE file into a foreign processes 9->47 18 wire payment.exe 2 5 9->18         started        21 YYtJku.exe 12->21         started        signatures5 process6 dnsIp7 49 Tries to harvest and steal ftp login credentials 14->49 51 Tries to harvest and steal browser information (history, passwords, etc) 14->51 53 Hides that the sample has been downloaded from the Internet (zone.identifier) 14->53 29 mail.transfastc.com 108.167.160.43, 49750, 49751, 587 UNIFIEDLAYER-AS-1US United States 18->29 31 192.168.2.1 unknown unknown 18->31 23 C:\Users\user\AppData\Roaming\...\YYtJku.exe, PE32 18->23 dropped 25 C:\Users\user\...\YYtJku.exe:Zone.Identifier, ASCII 18->25 dropped 55 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 18->55 57 Moves itself to temp directory 18->57 59 Tries to steal Mail credentials (via file access) 18->59 file8 signatures9
Detection:
agenttesla
Create hunting rule
Link:
https://mwdb.cert.pl/sample/91e478af0d259a398a1f018da401190e09bb38ee5c15647f4c97a35c43d9800c/
Threat name:
ByteCode-MSIL.Trojan.Kryptik
Create hunting rule
Status:
Malicious
First seen:
2020-08-07 13:29:10 UTC
AV detection:
23 of 29 (79.31%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=shshrlynewndtcq7agg2iaizbye3woholqkwi72ms6rvyq6zqaga._file
Verdict:
malicious
Label(s):
agenttesla
Create hunting rule
Similar samples:
1c94475216a36fd670d2d6512f4a4347f809847a0491b768f81fa33fa00ccc83
AgentTesla
2d97cf9262ff136c4d4f42d29be1b0e119e48373acf969dbaf6aa0c188c5ab10
AgentTesla
45b93bb13395c8a791fe0eaa763bd84e963a5b7a8bc348cfd1230004cf080e3b
AgentTesla
55c46eca6b7b3d44afd9f09eab01429f08447da65ac74995dbc0a15793824614
AgentTesla
6770ffec040c10ed6a13f0e654e9ac96763d3dd9c0c214ce658aa0648367216a
AgentTesla
68624d31f561c1e2b735c18ecef36cc6c648803a19b34d1d75bf5815f3037675
AgentTesla
6a183615d915485f9dd3885a278e7f3e5f434123a68a8821ff22f13a92fb5d36
AgentTesla
8d586c82d5848fbb3bc04edb076ca3bef09ed04006357f15fca5a131a73f8286
AgentTesla
95288eb9eb753179b5e44337933fa86d6d60889fe7189b445c73b8cc77f05240
AgentTesla
e8f9ccab47a8ec10861607e8de21c6617cd36e4eefbffe90144f357f3566657d
AgentTesla
+ 10'957 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/200807-9s5zc9p9e2/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: RenamesItself
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Adds Run key to start application
Reads user/profile data of local email clients
Reads user/profile data of web browsers
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:
Suspicious File
Score:
0.45
Link:
https://yomi.yoroi.company/submissions/91e478af0d259a398a1f018da401190e09bb38ee5c15647f4c97a35c43d9800c

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

z efc0eeca100e9825ad16c2748b547b4e09ae42acb725a285d8ae4b8fac58b5ae

AgentTesla

Executable exe 91e478af0d259a398a1f018da401190e09bb38ee5c15647f4c97a35c43d9800c

(this sample)

  
Dropped by
MD5 adb7f1b050ff60dde14bb2c971ee22b4
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/41658/
  
Dropped by
SHA256 efc0eeca100e9825ad16c2748b547b4e09ae42acb725a285d8ae4b8fac58b5ae

Comments