MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 638b2076b8254e21243ba434a06b1c96bf451af3566b3e624dc5af8904eb3a7b. 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: 17


Intelligence 17 IOCs YARA 15 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 638b2076b8254e21243ba434a06b1c96bf451af3566b3e624dc5af8904eb3a7b
SHA3-384 hash: 61f2d4de790ec8b2b57fbfc14ed30255927cfb926c3083705708540afd3a86a80f77045beff689d437b50b41c7f385bb
SHA1 hash: 2e7a30be30696744fc09a91260a0bc741c6c046e
MD5 hash: f7d956dd77ca0f804fe7d9ac55ed0782
humanhash: four-solar-king-ack
File name:rIMG-Scan-NewPOPSB-17398902,PSB-18384789.exe
Download: download sample
Signature AgentTesla
Create hunting rule
File size:755'200 bytes
First seen:2024-01-22 11:43:06 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep 12288:Bm1emkVhgjjN2iN+X6YJSaZkWYCDAgJaPCFAmAooeY7TZGgxLYWjmVGKA5FPX:Bm0DgjjN1CFSEaP0bBQ7F1uGn
TLSH T1CBF40192F26CAF85D92693FC4820F02063BABB6B412DD74A2EF270DB14727C21656D47
TrID 61.9% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
11.1% (.SCR) Windows screen saver (13097/50/3)
8.9% (.EXE) Win64 Executable (generic) (10523/12/4)
5.5% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
3.8% (.EXE) Win32 Executable (generic) (4505/5/1)
Reporter FXOLabs
Tags:AgentTesla exe

Intelligence

File Origin
# of uploads :
1
# of downloads :
398
Origin country :
FR FR
Vendor Threat Intelligence
Malware family:
agenttesla
Create hunting rule
ID:
1
File name:
638b2076b8254e21243ba434a06b1c96bf451af3566b3e624dc5af8904eb3a7b.exe
Verdict:
Malicious activity
Analysis date:
2024-01-22 11:47:51 UTC
Tags:
stealer agenttesla
Link:
https://app.any.run/tasks/05e9944e-60a7-458e-9ae0-7e94370e6c64

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
AgentTesla
Create hunting rule
Link:
https://www.capesandbox.com/analysis/472276/
Detection(s):
SecuriteInfo.com.MSIL.Kryptik.WZA.UNOFFICIAL
Create hunting rule

Porcupine.Malware.58887.UNOFFICIAL
Create hunting rule

Porcupine.Trojan.MSIL.Taskun.205190.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Adding an access-denied ACE
Creating a process with a hidden window
Creating a file in the %temp% directory
Launching a process
Unauthorized injection to a recently created process
Restart of the analyzed sample
Creating a file
Using the Windows Management Instrumentation requests
Reading critical registry keys
Creating a window
Sending a custom TCP request
Сreating synchronization primitives
Creating a file in the %AppData% directory
Enabling the 'hidden' option for recently created files
Stealing user critical data
Adding an exclusion to Microsoft Defender
Enabling autorun by creating a file
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
packed
Link:
https://www.filescan.io/uploads/65ae5502fc0458d7ffd5c7e2/reports/4b849042-7ae9-4595-8823-c554dbbcf187/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/638b2076b8254e21243ba434a06b1c96bf451af3566b3e624dc5af8904eb3a7b
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:
Agent Tesla
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/045662a4-0c13-4c16-9457-51b3d22fda80
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1378681
Signature
.NET source code contains potential unpacker
.NET source code contains very large array initializations
Adds a directory exclusion to Windows Defender
Antivirus detection for URL or domain
Contains functionality to log keystrokes (.Net Source)
Found malware configuration
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
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 harvest and steal browser information (history, passwords, etc)
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
Yara detected Generic Downloader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1378681 Sample: rIMG-Scan-NewPOPSB-17398902... Startdate: 22/01/2024 Architecture: WINDOWS Score: 100 40 mail.commtechtrading.com 2->40 42 commtechtrading.com 2->42 46 Multi AV Scanner detection for domain / URL 2->46 48 Found malware configuration 2->48 50 Malicious sample detected (through community Yara rule) 2->50 52 10 other signatures 2->52 8 rIMG-Scan-NewPOPSB-17398902,PSB-18384789.exe 7 2->8         started        12 VBnrrB.exe 5 2->12         started        signatures3 process4 file5 36 C:\Users\user\AppData\Roaming\VBnrrB.exe, PE32 8->36 dropped 38 C:\Users\user\AppData\Local\...\tmpB7E8.tmp, XML 8->38 dropped 54 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 8->54 56 Uses schtasks.exe or at.exe to add and modify task schedules 8->56 58 Adds a directory exclusion to Windows Defender 8->58 14 rIMG-Scan-NewPOPSB-17398902,PSB-18384789.exe 2 8->14         started        18 powershell.exe 23 8->18         started        20 schtasks.exe 1 8->20         started        22 rIMG-Scan-NewPOPSB-17398902,PSB-18384789.exe 8->22         started        60 Multi AV Scanner detection for dropped file 12->60 62 Machine Learning detection for dropped file 12->62 64 Injects a PE file into a foreign processes 12->64 24 VBnrrB.exe 2 12->24         started        26 schtasks.exe 1 12->26         started        signatures6 process7 dnsIp8 44 commtechtrading.com 173.236.63.6, 49708, 49711, 587 SINGLEHOP-LLCUS United States 14->44 28 WmiPrvSE.exe 18->28         started        30 conhost.exe 18->30         started        32 conhost.exe 20->32         started        66 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 24->66 68 Tries to steal Mail credentials (via file / registry access) 24->68 70 Tries to harvest and steal browser information (history, passwords, etc) 24->70 34 conhost.exe 26->34         started        signatures9 process10
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/638b2076b8254e21243ba434a06b1c96bf451af3566b3e624dc5af8904eb3a7b
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/638b2076b8254e21243ba434a06b1c96bf451af3566b3e624dc5af8904eb3a7b/
Threat name:
Win32.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2024-01-18 08:20:48 UTC
File Type:
PE (.Net Exe)
Extracted files:
9
AV detection:
18 of 23 (78.26%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=mofsa5vyevhccjb3uq2ka2y4s27ukgxtkzvt4ysnywxysbhlhj5q._file
Verdict:
malicious
Label(s):
agenttesla_v4
Create hunting rule
agenttesla
Create hunting rule
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
family:agenttesla keylogger spyware stealer trojan
Link:
https://tria.ge/reports/240122-nv5tksfgb8/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Checks computer location settings
Reads data files stored by FTP clients
Reads user/profile data of local email clients
Reads user/profile data of web browsers
AgentTesla
Unpacked files
SH256 hash:
292a0518841e86949acf831703623779d63591cc95ebc4030d00da3b72066c77
MD5 hash:
4d697347eedf1d51cc5fcf7a066621f1
SHA1 hash:
bb9398d6d9f9ff3c74aadee7cdac6e04fab4770d
Link:
https://www.unpac.me/results/50c9d705-6d33-4b2d-b859-b5c132acb34a/
SH256 hash:
416832c101f97ecf097dccc190f35c307ca9369c4fdb7bd8b3e95016120a4d04
MD5 hash:
b9be00cfe19fcc8649876eb70d8a0078
SHA1 hash:
8ac8fea05cda67e0ea02e6f29892139f0e938c6c
Detections:
AgentTesla
Create hunting rule
win_agent_tesla_g2
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_Referenfces_File_Transfer_Clients
Create hunting rule
Agenttesla_type2
Create hunting rule
INDICATOR_SUSPICIOUS_Binary_References_Browsers
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_VaultSchemaGUID
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_References_Messaging_Clients
Create hunting rule
INDICATOR_EXE_Packed_GEN01
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_References_Confidential_Data_Store
Create hunting rule
Link:
https://www.unpac.me/results/50c9d705-6d33-4b2d-b859-b5c132acb34a/
Parent samples :
cb7c810d1def4f26ab7841a883508648e9d5a7de232a066f63ce7acdd8e4f5b0
638b2076b8254e21243ba434a06b1c96bf451af3566b3e624dc5af8904eb3a7b
SH256 hash:
d578727754278e55abe7f4620423e45ef4ee4f139ae62e778bd20f5f852a855d
MD5 hash:
4342ed4f76f1fc1261f3a9aa7fdf18b3
SHA1 hash:
658daccf9f37d2170c54604d3d05564045cc5aaf
Link:
https://www.unpac.me/results/50c9d705-6d33-4b2d-b859-b5c132acb34a/
SH256 hash:
1e5a74aecddc670cd8f4420add0ef135d412af831c38a3c86034984f1cdd399f
MD5 hash:
3692dcd92fd0e6091c6db0244b2026d7
SHA1 hash:
08a56c85b5b015e03cc141b2bfe8dea7e585b6fb
Link:
https://www.unpac.me/results/50c9d705-6d33-4b2d-b859-b5c132acb34a/
SH256 hash:
638b2076b8254e21243ba434a06b1c96bf451af3566b3e624dc5af8904eb3a7b
MD5 hash:
f7d956dd77ca0f804fe7d9ac55ed0782
SHA1 hash:
2e7a30be30696744fc09a91260a0bc741c6c046e
Link:
https://www.unpac.me/results/50c9d705-6d33-4b2d-b859-b5c132acb34a/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/638b2076b825/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/638b2076b8254e21243ba434a06b1c96bf451af3566b3e624dc5af8904eb3a7b

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:AgentTeslaV3
Create hunting rule
Author:ditekshen
Description:AgentTeslaV3 infostealer payload
Rule name:AgentTesla_DIFF_Common_Strings_01
Create hunting rule
Author:schmidtsz
Description:Identify partial Agent Tesla strings
Rule name:INDICATOR_EXE_Packed_GEN01
Create hunting rule
Author:ditekSHen
Description:Detect packed .NET executables. Mostly AgentTeslaV4.
Rule name:INDICATOR_SUSPICIOUS_Binary_References_Browsers
Create hunting rule
Author:ditekSHen
Description:Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.
Rule name:INDICATOR_SUSPICIOUS_EXE_References_Confidential_Data_Store
Create hunting rule
Author:ditekSHen
Description:Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers
Rule name:INDICATOR_SUSPICIOUS_EXE_References_Messaging_Clients
Create hunting rule
Author:ditekSHen
Description:Detects executables referencing many email and collaboration clients. Observed in information stealers
Rule name:INDICATOR_SUSPICIOUS_EXE_Referenfces_File_Transfer_Clients
Create hunting rule
Author:ditekSHen
Description:Detects executables referencing many file transfer clients. Observed in information stealers
Rule name:INDICATOR_SUSPICIOUS_EXE_VaultSchemaGUID
Create hunting rule
Author:ditekSHen
Description:Detects executables referencing Windows vault credential objects. Observed in infostealers
Rule name:malware_Agenttesla_type2
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Agenttesla in memory
Reference:internal research
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:NETexecutableMicrosoft
Create hunting rule
Author:malware-lu
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:Windows_Trojan_AgentTesla_ebf431a8
Create hunting rule
Author:Elastic Security

File information

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

Malspam

AgentTesla

Executable exe 638b2076b8254e21243ba434a06b1c96bf451af3566b3e624dc5af8904eb3a7b

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/472276/

Comments