MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 cff634048d6a2f51f024be83033493d77290fce66f23e9a1f0c4bcea7c6ae8da. 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: 12


Intelligence 12 IOCs YARA 7 File information Comments
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SHA256 hash: cff634048d6a2f51f024be83033493d77290fce66f23e9a1f0c4bcea7c6ae8da
SHA3-384 hash: d2afcf09235c6eb993fe3f311cfec4cbdb9cee2cb12c405c0e37ce450b461bdd84a82df25dc73700ae99906f5568776d
SHA1 hash: d51a401cedeba4b02ef648a52f9df4d214a707d5
MD5 hash: 921b670af4b1b6ca3df8a3f71bc5e385
humanhash: mockingbird-nevada-yankee-fish
File name:Contract Documents.exe
Download: download sample
Signature AgentTesla
Create hunting rule
File size:507'904 bytes
First seen:2021-11-10 10:20:00 UTC
Last seen:2021-11-12 09:38:57 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'658 x AgentTesla, 19'469 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 12288:5aazCi3tD002XyOpNbN7YVvn7k+svmjq4cZxXfsT:5aEC0GNbxOn0TxXfs
TLSH T16EB4012E3FA4DE45D17B663ECCEE946003FD7856A8A2C72D7FC8134B296178118506AF
Reporter GovCERT_CH
Tags:AgentTesla exe

Intelligence

File Origin
# of uploads :
6
# of downloads :
122
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/204679/
Detection(s):
SecuriteInfo.com.Trojan.PackedNET.1098.11187.8449.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
obfuscated packed
Link:
https://www.filescan.io/uploads/618b9cd5175442ca93aa79fa/reports/79d0a7c9-9738-4b0c-9936-2f138438c757/overview
Result
Verdict:
MALICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Malware family:
Generic Malware
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/ee5fb5dd-0665-4eca-b9ad-c788995deae4
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/886623
Signature
Adds a directory exclusion to Windows Defender
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
Multi AV Scanner detection for dropped 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)
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Sigma detected: Powershell Defender Exclusion
Sigma detected: Suspicius Add Task From User AppData Temp
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 / registry access)
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AgentTesla
Yara detected AntiVM3
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 519096 Sample: Contract Documents.exe Startdate: 10/11/2021 Architecture: WINDOWS Score: 100 64 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->64 66 Multi AV Scanner detection for dropped file 2->66 68 Yara detected AgentTesla 2->68 70 10 other signatures 2->70 7 Contract Documents.exe 7 2->7         started        11 VPaGlQO.exe 2->11         started        13 VPaGlQO.exe 2->13         started        process3 file4 50 C:\Users\user\AppData\...\PaZBrkqLamoX.exe, PE32 7->50 dropped 52 C:\Users\user\AppData\Local\...\tmpF140.tmp, XML 7->52 dropped 72 Adds a directory exclusion to Windows Defender 7->72 74 Injects a PE file into a foreign processes 7->74 15 Contract Documents.exe 7->15         started        20 powershell.exe 24 7->20         started        22 powershell.exe 24 7->22         started        32 2 other processes 7->32 76 Multi AV Scanner detection for dropped file 11->76 78 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 11->78 80 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 11->80 82 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 11->82 24 powershell.exe 11->24         started        26 powershell.exe 11->26         started        28 schtasks.exe 11->28         started        30 VPaGlQO.exe 11->30         started        signatures5 process6 dnsIp7 54 mail.packsealsind.com 162.241.148.56, 49845, 587 UNIFIEDLAYER-AS-1US United States 15->54 46 C:\Users\user\AppData\Roaming\...\VPaGlQO.exe, PE32 15->46 dropped 48 C:\Users\user\...\VPaGlQO.exe:Zone.Identifier, ASCII 15->48 dropped 56 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 15->56 58 Tries to steal Mail credentials (via file / registry access) 15->58 60 Tries to harvest and steal ftp login credentials 15->60 62 2 other signatures 15->62 34 conhost.exe 20->34         started        36 conhost.exe 22->36         started        38 conhost.exe 24->38         started        40 conhost.exe 26->40         started        42 conhost.exe 28->42         started        44 conhost.exe 32->44         started        file8 signatures9 process10
Detection:
agenttesla
Create hunting rule
Link:
https://mwdb.cert.pl/sample/cff634048d6a2f51f024be83033493d77290fce66f23e9a1f0c4bcea7c6ae8da/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-11-10 10:20:07 UTC
AV detection:
20 of 44 (45.45%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=z73dibennixvd4bex2bqgnet25zjb7hgn4r6tipqys6ou7dk5dna._file
Verdict:
malicious
Label(s):
agenttesla
Create hunting rule
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
family:agenttesla collection evasion keylogger persistence spyware stealer trojan
Link:
https://tria.ge/reports/211110-mc5kesggb7/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
outlook_office_path
outlook_win_path
Enumerates physical storage devices
Suspicious use of SetThreadContext
Accesses Microsoft Outlook profiles
Adds Run key to start application
Maps connected drives based on registry
Checks BIOS information in registry
Reads data files stored by FTP clients
Reads user/profile data of local email clients
Reads user/profile data of web browsers
Looks for VMWare Tools registry key
AgentTesla Payload
Looks for VirtualBox Guest Additions in registry
AgentTesla
Unpacked files
SH256 hash:
181095942b3eee419871a024f48acc194c2051ccb8276eebaaa353dfc50aa2fe
MD5 hash:
64fd047be6a629fdaabc4371e022b93b
SHA1 hash:
f66698532b484b1e6d21d96b01056b7bb34243e4
Link:
https://www.unpac.me/results/3b2027ba-ee74-4d57-9ab1-7efa18ef6e80/
SH256 hash:
91655863c7906a8d20c7c782144f553c027843a72f2fdab2b1ccc80808083af0
MD5 hash:
b5044dd0e9c91b1a9185d491da7d07f2
SHA1 hash:
a9ff8129771d85f77b6a145f750c70e53f51125e
Link:
https://www.unpac.me/results/3b2027ba-ee74-4d57-9ab1-7efa18ef6e80/
SH256 hash:
53e1af067b228e878594bb31247879d7aa45f5751b480fe8e68cd5a2357a472f
MD5 hash:
ad1f3c12b920bfbef2cdd673fdb4b28f
SHA1 hash:
91679d09a4781592209f65376073d15b20a341b3
Link:
https://www.unpac.me/results/3b2027ba-ee74-4d57-9ab1-7efa18ef6e80/
SH256 hash:
a7bdd33dee7fd872dc8b04e656ee95b87830440135b4902268930f2666ab8dd9
MD5 hash:
a4a43577aefca1fd77969f24b68ee7a4
SHA1 hash:
21f9f51e8c50ef87af58cd15ba479228a3475b0a
Link:
https://www.unpac.me/results/3b2027ba-ee74-4d57-9ab1-7efa18ef6e80/
SH256 hash:
cff634048d6a2f51f024be83033493d77290fce66f23e9a1f0c4bcea7c6ae8da
MD5 hash:
921b670af4b1b6ca3df8a3f71bc5e385
SHA1 hash:
d51a401cedeba4b02ef648a52f9df4d214a707d5
Link:
https://www.unpac.me/results/3b2027ba-ee74-4d57-9ab1-7efa18ef6e80/
Malware family:
Agent Tesla v3
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/cff634048d6a/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/cff634048d6a2f51f024be83033493d77290fce66f23e9a1f0c4bcea7c6ae8da

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:ach_AgentTesla_20200929
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Author:abuse.ch
Description:Detects AgentTesla PE
Rule name:AgentTeslaV3
Create hunting rule
Author:ditekshen
Description:AgentTeslaV3 infostealer payload
Rule name:MALWARE_Win_AgentTeslaV3
Create hunting rule
Author:ditekSHen
Description:AgentTeslaV3 infostealer payload
Rule name:pe_imphash
Create hunting rule
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:win_agent_tesla_v1
Create hunting rule
Author:Johannes Bader @viql
Description:detects Agent Tesla

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Malspam

AgentTesla

Executable exe cff634048d6a2f51f024be83033493d77290fce66f23e9a1f0c4bcea7c6ae8da

(this sample)

  
Dropped by
agenttesla
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/204679/

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