MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b81530cca77b78402585d96bcfc8e417aa86dd53ac1966601ce8c32bbf517cc3. 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: 16


Intelligence 16 IOCs YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b81530cca77b78402585d96bcfc8e417aa86dd53ac1966601ce8c32bbf517cc3
SHA3-384 hash: 43fe66332aac3e2ca4e86a3664006b7ff9d1f4a44fab5300b32fe49ca474d4a1a6eb242e2eb6ada5de3d3570f549bbc7
SHA1 hash: 2b3f573e80f99f300a1fbe6390084a01822fa0aa
MD5 hash: dfc62195c6293a84c6e9ab815ce50a6c
humanhash: quebec-undress-bakerloo-fourteen
File name:ReInquiry Lenght Error.exe
Download: download sample
Signature AgentTesla
Create hunting rule
File size:793'088 bytes
First seen:2024-04-16 15:12:45 UTC
Last seen:2024-04-17 08:40:22 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'649 x AgentTesla, 19'454 x Formbook, 12'202 x SnakeKeylogger)
ssdeep 6144:oXIEI2T4Q5hWcMzUBfZbe970/cIP6VlXFD2Et8WAdxJOYd+gAp42aiangA8j7loR:CIjURrcIw228VAHhdUbzyT6sxu3IAKw
Threatray 810 similar samples on MalwareBazaar
TLSH T1D0F4F06925BBDF6AD1BC47FA4124183407F6B65FA2B4E31B4FCAA0C91811FD40996B33
TrID 71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.2% (.EXE) Win64 Executable (generic) (10523/12/4)
6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.3% (.EXE) Win32 Executable (generic) (4504/4/1)
2.0% (.ICL) Windows Icons Library (generic) (2059/9)
Reporter threatcat_ch
Tags:AgentTesla exe

Intelligence

File Origin
# of uploads :
4
# of downloads :
314
Origin country :
CH CH
Vendor Threat Intelligence
Malware family:
agenttesla
Create hunting rule
ID:
1
File name:
ReInquiry Lenght Error.exe
Verdict:
Malicious activity
Analysis date:
2024-04-16 08:29:59 UTC
Tags:
evasion stealer agenttesla
Link:
https://app.any.run/tasks/048a72f3-56c8-409b-8d40-c49fc64dc961

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Searching for synchronization primitives
Launching the default Windows debugger (dwwin.exe)
Launching a process
Moving a file to the Program Files subdirectory
Replacing files
Verdict:
Malicious
Labled as:
Malware
Link:
https://www.hybrid-analysis.com/sample/b81530cca77b78402585d96bcfc8e417aa86dd53ac1966601ce8c32bbf517cc3
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/508928fe-b1f1-408d-8c5f-46d3a91c70c7
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1426826
Signature
.NET source code contains potential unpacker
.NET source code contains very large array initializations
Adds a directory exclusion to Windows Defender
Check if machine is in data center or colocation facility
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Contains functionality to log keystrokes (.Net Source)
Found malware configuration
Injects a PE file into a foreign processes
Loading BitLocker PowerShell Module
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
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: Powershell Base64 Encoded MpPreference Cmdlet
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 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: 1426826 Sample: ReInquiry Lenght Error.exe Startdate: 16/04/2024 Architecture: WINDOWS Score: 100 46 us2.smtp.mailhostbox.com 2->46 48 ip-api.com 2->48 50 Found malware configuration 2->50 52 Malicious sample detected (through community Yara rule) 2->52 54 Sigma detected: Scheduled temp file as task from temp location 2->54 56 14 other signatures 2->56 8 ReInquiry Lenght Error.exe 7 2->8         started        12 XmiDHRWI.exe 5 2->12         started        signatures3 process4 file5 38 C:\Users\user\AppData\Roaming\XmiDHRWI.exe, PE32 8->38 dropped 40 C:\Users\user\AppData\Local\...\tmp6629.tmp, XML 8->40 dropped 58 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 8->58 60 Adds a directory exclusion to Windows Defender 8->60 62 Injects a PE file into a foreign processes 8->62 14 powershell.exe 23 8->14         started        17 ReInquiry Lenght Error.exe 15 2 8->17         started        20 powershell.exe 23 8->20         started        22 schtasks.exe 1 8->22         started        64 Multi AV Scanner detection for dropped file 12->64 66 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 12->66 68 Machine Learning detection for dropped file 12->68 24 XmiDHRWI.exe 12->24         started        26 schtasks.exe 12->26         started        signatures6 process7 dnsIp8 70 Loading BitLocker PowerShell Module 14->70 28 conhost.exe 14->28         started        30 WmiPrvSE.exe 14->30         started        42 ip-api.com 208.95.112.1, 49706, 49711, 80 TUT-ASUS United States 17->42 44 us2.smtp.mailhostbox.com 208.91.199.223, 49708, 49712, 587 PUBLIC-DOMAIN-REGISTRYUS United States 17->44 32 conhost.exe 20->32         started        34 conhost.exe 22->34         started        72 Tries to steal Mail credentials (via file / registry access) 24->72 74 Tries to harvest and steal browser information (history, passwords, etc) 24->74 36 conhost.exe 26->36         started        signatures9 process10
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/b81530cca77b78402585d96bcfc8e417aa86dd53ac1966601ce8c32bbf517cc3
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b81530cca77b78402585d96bcfc8e417aa86dd53ac1966601ce8c32bbf517cc3/
Threat name:
Win32.Spyware.Negasteal
Create hunting rule
Status:
Malicious
First seen:
2024-04-16 08:23:58 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
23 of 24 (95.83%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=xaktbtfhpn4eajmf3fv47shec6vinxktvqmwmya45dbsxp2rptbq._file
Verdict:
malicious
Label(s):
agenttesla_v4
Create hunting rule
agenttesla
Create hunting rule
Similar samples:
1a632b809dda5ccb587a4c6dc66f7b0e118e17d91f8e6813a1cb36dfe3396771
AgentTesla
b5126fd0fbb2ecd8fb2b32b606a4e8ab867bc0758e146d14c88440c1ac9c8f60
AgentTesla
d94b9ee70ad9ab6ba6f81c0f01565681714c56297d8d5826135c80c6cbbb2146
AgentTesla
f72fe64d564b061125bc41a0e706bd9a701f5bfaa103e0f1e4a53b88083cc3b5
AgentTesla
fe713895248de4b043b3427642117fb02d309dcacd002d7f183e07112976b515
AgentTesla
+ 800 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/240416-slqqhsdc22/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
Suspicious use of SetThreadContext
Looks up external IP address via web service
Checks computer location settings
Reads user/profile data of local email clients
Reads user/profile data of web browsers
AgentTesla
Unpacked files
SH256 hash:
e9c028ecb36a6fb2e3a9f2ce8e58fa444649dd3c47039765cca1967dcc99ef3b
MD5 hash:
65e87dc385029fc40a1d83797b7fbbae
SHA1 hash:
96ee40ce767bf100c7f5c7eb38eda137a9ecd6e5
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_SUSPICIOUS_EXE_SandboxHookingDLL
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/0db323aa-c149-4187-b43d-1f3da2acaef9/
Parent samples :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 hash:
4f9af1bc7a585bea9a3056d63b9bc1da91cceeab1503cb04724e0abf02de1e11
MD5 hash:
3c9602d0c4e4b4761a61fac9762b75d5
SHA1 hash:
7d3d5703b4fa708620d043e04b36ae7294dd211f
Link:
https://www.unpac.me/results/0db323aa-c149-4187-b43d-1f3da2acaef9/
SH256 hash:
3dec0276bc10ff9732c3d417c1ea620d42825de94ae5a06d823e9e1cc9f93b7e
MD5 hash:
081cdcef31dacd96bab81ff286feef33
SHA1 hash:
3535f13d62f6a9e6d5f3754d3d99affdd84d5b76
Link:
https://www.unpac.me/results/0db323aa-c149-4187-b43d-1f3da2acaef9/
SH256 hash:
5a9e64482afd6406319b956396c12b8e165f2d2e95ecda530bbbcd436e52f6e2
MD5 hash:
e7cd8fd81000b26f810afc96c537be95
SHA1 hash:
2959baf46a5d0c671530fc5f2a1e34a7eed6958f
Link:
https://www.unpac.me/results/0db323aa-c149-4187-b43d-1f3da2acaef9/
SH256 hash:
b81530cca77b78402585d96bcfc8e417aa86dd53ac1966601ce8c32bbf517cc3
MD5 hash:
dfc62195c6293a84c6e9ab815ce50a6c
SHA1 hash:
2b3f573e80f99f300a1fbe6390084a01822fa0aa
Link:
https://www.unpac.me/results/0db323aa-c149-4187-b43d-1f3da2acaef9/
Malware family:
AgentTesla
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b81530cca77b/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/b81530cca77b78402585d96bcfc8e417aa86dd53ac1966601ce8c32bbf517cc3

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: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

File information

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

Malspam

AgentTesla

zip 1ae8a3ae1d718efbce087f5070991594b0ceb6e3ba53f154742aebc1577adaae

AgentTesla

Executable exe b81530cca77b78402585d96bcfc8e417aa86dd53ac1966601ce8c32bbf517cc3

(this sample)

  
Delivery method
Distributed via e-mail attachment
  
Dropped by
SHA256 1ae8a3ae1d718efbce087f5070991594b0ceb6e3ba53f154742aebc1577adaae
  
Dropped by
MD5 97074aee274ee163b4c2be47a499f254

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings
IDTitleSeverity
CHECK_AUTHENTICODEMissing Authenticodehigh
CHECK_DLL_CHARACTERISTICSMissing dll Security Characteristics (HIGH_ENTROPY_VA)high

Comments