MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 cfba5dd939d2d7bfc08f500cdec99afcba91c463d70086c53dffd65dc1e965d8. 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: 10


Intelligence 10 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: cfba5dd939d2d7bfc08f500cdec99afcba91c463d70086c53dffd65dc1e965d8
SHA3-384 hash: 8ffddd74166ff3fba98a1d3dcb563792388fb0db2555b31e5b388173fac0689957214bd4554d9fcd5dc8c97d30627438
SHA1 hash: 5542a7a221f430dd1c5e3d6270e7f463229a7926
MD5 hash: e36a2ec87a4f03c86797c483e8a2b4b2
humanhash: king-illinois-blue-tennis
File name:viva stub (2).exe
Download: download sample
Signature AgentTesla
Create hunting rule
File size:1'158'144 bytes
First seen:2022-03-29 14:04:52 UTC
Last seen:2022-03-29 14:52:12 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'663 x AgentTesla, 19'478 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 24576:HLFQJC+QUu1niA4GUO9QDCP6tDHZPKGY8yl9iMOty9gKqZzBv82/8:eJC+QUuLF39QDCP6NdKGY8yOtyhqDvNE
Threatray 1'390 similar samples on MalwareBazaar
TLSH T1FD35F126778EC902CA7D577798EB80004B74BD5A5963D70E79C833FC0E23796A94A70B
Reporter lowmal3
Tags:AgentTesla exe

Intelligence

File Origin
# of uploads :
2
# of downloads :
187
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/259279/
Detection(s):
SecuriteInfo.com.MachineLearning.Anomalous.100.17737.18189.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Unauthorized injection to a recently created process
Creating a file
Using the Windows Management Instrumentation requests
Launching the default Windows debugger (dwwin.exe)
Creating a process with a hidden window
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
control.exe obfuscated packed replace.exe update.exe
Link:
https://www.filescan.io/uploads/624312109253b276b79c602a/reports/d7a42541-d91c-4bf0-bb36-f82022f29d25/overview
Result
Verdict:
UNKNOWN
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:
Agent Tesla
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/4bf47400-ff1b-4a66-b70d-3888bc09cb04
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/966790
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code contains potential unpacker
.NET source code contains very large array initializations
Antivirus / Scanner detection for submitted sample
Found malware configuration
Injects a PE file into a foreign processes
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
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)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Yara detected AgentTesla
Yara detected AntiVM3
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 599279 Sample: viva stub (2).exe Startdate: 29/03/2022 Architecture: WINDOWS Score: 100 19 Found malware configuration 2->19 21 Malicious sample detected (through community Yara rule) 2->21 23 Antivirus / Scanner detection for submitted sample 2->23 25 10 other signatures 2->25 7 viva stub (2).exe 3 2->7         started        process3 file4 17 C:\Users\user\...\viva stub (2).exe.log, ASCII 7->17 dropped 27 Injects a PE file into a foreign processes 7->27 11 viva stub (2).exe 2 7->11         started        13 viva stub (2).exe 7->13         started        signatures5 process6 process7 15 WerFault.exe 23 9 11->15         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/cfba5dd939d2d7bfc08f500cdec99afcba91c463d70086c53dffd65dc1e965d8/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2022-03-29 11:53:33 UTC
File Type:
PE (.Net Exe)
Extracted files:
25
AV detection:
20 of 26 (76.92%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=z65f3wjz2ll37qepkagn5sm27s5jdrdd24ainrj577lf3qpjmxma._file
Verdict:
malicious
Label(s):
agenttesla
Create hunting rule
Similar samples:
4327aef2ef9bc6d3c531505e56e4514c8b3bc8ee4d361689fb5e902f4af7d965
AgentTesla
4d1e78141f3a1319a3d6074493bc633eab3bc4504220a52f5f8f5faaa9be1bd0
AgentTesla
ba347c1008ade9d22ce86ffc99ad1b8d8bb3fe4d392d911e8c4c2f2a11c98f13
AgentTesla
be13445bfc27add23b008bd963fb87dbe131334ae4b627a97f34083fe355eae0
AgentTesla
c218b9d54c1dd72bd98226c31ef26913a26c5b6a06a6863c1848aa1a829fce61
AgentTesla
f133bd95fedd4f9df5a28d3844771a82ebd6ff1a9959f98c1a9f2011b704f4fa
AgentTesla
fbe11b1820b0b2e2b883dce97f4005006db65cc45375700354381b9927c7382a
AgentTesla
+ 1'380 additional samples on MalwareBazaar
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
family:agenttesla keylogger spyware stealer trojan
Link:
https://tria.ge/reports/220329-rdtlrsafam/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Program crash
Drops file in System32 directory
Suspicious use of SetThreadContext
AgentTesla
Unpacked files
SH256 hash:
ebb5b48ce37ff6d48fecdb23a51fe1ceac55951c8a654bb171af9ccace8524db
MD5 hash:
50bdf482fae854fec6555b273c387d83
SHA1 hash:
c75c8c26147735b527599c8d58da668519fdb6cc
Link:
https://www.unpac.me/results/aa605813-341c-4f7d-bd70-190f79931bc1/
SH256 hash:
613b2819d35360cbfe6c94b2b998d1a4998c89f5bdef505e0e158e1288ab684c
MD5 hash:
3096cbaf4b5d40f9c61bf7ce13fde62f
SHA1 hash:
6b3c580e51fd306bfdc2e727ca3bc7805aba4b53
Link:
https://www.unpac.me/results/aa605813-341c-4f7d-bd70-190f79931bc1/
SH256 hash:
78c0b924a614d9aaaa9035ed7cd17fd1618e91a58b82a1963bf43f283f999e4d
MD5 hash:
4594f28723e553bffcbe2782bf0e0cd7
SHA1 hash:
57f439c88244d3eb6907cefb60441e680e2859ea
Link:
https://www.unpac.me/results/aa605813-341c-4f7d-bd70-190f79931bc1/
SH256 hash:
5003891da31e49e581bfb860684a70375985de97f2c12f642bffbbffc543338b
MD5 hash:
de35b7a4f79d3035197f67d8931aa9ec
SHA1 hash:
0d712fea410472f75e9deb42db828892e00ee133
Link:
https://www.unpac.me/results/aa605813-341c-4f7d-bd70-190f79931bc1/
SH256 hash:
cfba5dd939d2d7bfc08f500cdec99afcba91c463d70086c53dffd65dc1e965d8
MD5 hash:
e36a2ec87a4f03c86797c483e8a2b4b2
SHA1 hash:
5542a7a221f430dd1c5e3d6270e7f463229a7926
Link:
https://www.unpac.me/results/aa605813-341c-4f7d-bd70-190f79931bc1/
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/cfba5dd939d2d7bfc08f500cdec99afcba91c463d70086c53dffd65dc1e965d8

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:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

File information

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

Malspam

AgentTesla

Executable exe cfba5dd939d2d7bfc08f500cdec99afcba91c463d70086c53dffd65dc1e965d8

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/259279/

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