MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a91d29734ec4f9d8738c14872805f7e3d16898f45988a8502813988ab5c80bd0. 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: 18


Intelligence 18 IOCs YARA 15 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a91d29734ec4f9d8738c14872805f7e3d16898f45988a8502813988ab5c80bd0
SHA3-384 hash: 1e36bb8a68f16b2976d067b26311147961179680ef17da3b2927b23fa51276a2640e2ad51a577b0936a143da79d6242c
SHA1 hash: 421b93d80598440e9f4a8c465a0a95ef0f998028
MD5 hash: 4b01dc60f5724ff6340347a633688ba4
humanhash: finch-golf-yankee-mobile
File name:PO.exe
Download: download sample
Signature AgentTesla
Create hunting rule
File size:717'824 bytes
First seen:2023-11-02 15:55:14 UTC
Last seen:2023-11-02 17:13:30 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 12288:AreHdg3N69cbcrz6qg2t4vhyeveKhBNHW6zEyJnot:AreHdgdTqmqg2t4vpFMJ
TLSH T1CBE4E014B2FA1B27E97DD3F5006566400BB5A99EB57EE20A9EC321CE12A1F114EC4F37
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) (4505/5/1)
2.0% (.ICL) Windows Icons Library (generic) (2059/9)
Reporter cocaman
Tags:AgentTesla exe

Intelligence

File Origin
# of uploads :
2
# of downloads :
308
Origin country :
CH CH
Vendor Threat Intelligence
Malware family:
agenttesla
Create hunting rule
ID:
1
File name:
PO.exe
Verdict:
Malicious activity
Analysis date:
2023-11-02 17:36:55 UTC
Tags:
stealer agenttesla
Link:
https://app.any.run/tasks/9b6c8ec1-fcf8-4aa8-bb71-b5e562ad9b29

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/457819/
Detection(s):
Porcupine.Malware.58887.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.Win32.PWSX-gen.18741.25190.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a custom TCP request
Сreating synchronization primitives
Creating a process with a hidden window
Creating a file in the %AppData% directory
Enabling the 'hidden' option for recently created files
Adding an access-denied ACE
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
Adding an exclusion to Microsoft Defender
Enabling autorun by creating a file
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
packed
Link:
https://www.filescan.io/uploads/6543c6984ebf05ac3f420d5a/reports/28d0ade3-9e89-4300-b069-7e4ef1f4c02f/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/a91d29734ec4f9d8738c14872805f7e3d16898f45988a8502813988ab5c80bd0
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/05ca7d84-e6b1-4f50-a9a2-d8c056900a33
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1336098
Signature
.NET source code contains potential unpacker
Adds a directory exclusion to Windows Defender
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Contains functionality to log keystrokes (.Net Source)
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
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 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: 1336098 Sample: PO.exe Startdate: 02/11/2023 Architecture: WINDOWS Score: 100 62 mail.gcsho.com 2->62 64 api4.ipify.org 2->64 66 api.ipify.org 2->66 72 Found malware configuration 2->72 74 Malicious sample detected (through community Yara rule) 2->74 76 Antivirus / Scanner detection for submitted sample 2->76 78 8 other signatures 2->78 8 PO.exe 7 2->8         started        12 pCveTZjVoy.exe 5 2->12         started        14 CoUku.exe 2->14         started        16 2 other processes 2->16 signatures3 process4 dnsIp5 56 C:\Users\user\AppData\...\pCveTZjVoy.exe, PE32 8->56 dropped 58 C:\Users\user\AppData\Local\...\tmpE410.tmp, XML 8->58 dropped 90 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 8->90 92 Uses schtasks.exe or at.exe to add and modify task schedules 8->92 94 Adds a directory exclusion to Windows Defender 8->94 19 PO.exe 16 5 8->19         started        24 schtasks.exe 1 8->24         started        36 2 other processes 8->36 96 Antivirus detection for dropped file 12->96 98 Multi AV Scanner detection for dropped file 12->98 100 Machine Learning detection for dropped file 12->100 26 pCveTZjVoy.exe 12->26         started        28 schtasks.exe 12->28         started        102 Injects a PE file into a foreign processes 14->102 30 CoUku.exe 14->30         started        38 3 other processes 14->38 60 127.0.0.1 unknown unknown 16->60 32 CoUku.exe 16->32         started        34 schtasks.exe 16->34         started        file6 signatures7 process8 dnsIp9 68 mail.gcsho.com 144.76.195.231, 49714, 49716, 49721 HETZNER-ASDE Germany 19->68 70 api4.ipify.org 104.237.62.212, 443, 49711, 49715 WEBNXUS United States 19->70 52 C:\Users\user\AppData\Roaming\...\CoUku.exe, PE32 19->52 dropped 54 C:\Users\user\...\CoUku.exe:Zone.Identifier, ASCII 19->54 dropped 80 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 19->80 82 Tries to steal Mail credentials (via file / registry access) 19->82 84 Hides that the sample has been downloaded from the Internet (zone.identifier) 19->84 86 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 24->86 40 conhost.exe 24->40         started        42 conhost.exe 28->42         started        88 Tries to harvest and steal browser information (history, passwords, etc) 32->88 44 conhost.exe 34->44         started        46 conhost.exe 36->46         started        48 conhost.exe 36->48         started        50 conhost.exe 38->50         started        file10 signatures11 process12
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/a91d29734ec4f9d8738c14872805f7e3d16898f45988a8502813988ab5c80bd0
Detection:
agenttesla
Create hunting rule
Link:
https://mwdb.cert.pl/sample/a91d29734ec4f9d8738c14872805f7e3d16898f45988a8502813988ab5c80bd0/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2023-11-02 14:49:40 UTC
File Type:
PE (.Net Exe)
Extracted files:
24
AV detection:
17 of 24 (70.83%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=veoss42oyt45q44mcsdsqbpx4piwrghulgekqubicomivnoibpia._file
Verdict:
malicious
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
family:agenttesla keylogger persistence spyware stealer trojan
Link:
https://tria.ge/reports/231102-tdb3tsgd56/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Adds Run key to start application
Looks up external IP address via web service
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:
24efb58517ed32be95a9c7915e0dfb65c8528557e5f9e750f7cdcfc5748ac081
MD5 hash:
98a179b624386412c807ce576632ed9e
SHA1 hash:
db2baa4f4957456d28540541da8c742d520e9339
Link:
https://www.unpac.me/results/ddc6ffbd-20a6-4d23-80ad-2fd53e2c76bc/
SH256 hash:
d01f3dea3851602ba5a0586c60430d286adf6fcc7e17aab080601a66630606e5
MD5 hash:
579197d4f760148a9482d1ebde113259
SHA1 hash:
cf6924eb360c7e5a117323bebcb6ee02d2aec86d
Link:
https://www.unpac.me/results/ddc6ffbd-20a6-4d23-80ad-2fd53e2c76bc/
SH256 hash:
b99bf6f4027b2b382ad56ec4f238268a42501196b448fa74effc34eb0072405c
MD5 hash:
a67991e1801b23f415ab024e53a546db
SHA1 hash:
98e78441947c374c421c7e2087e6ff74e1860591
Detections:
AgentTesla
Create hunting rule
win_agent_tesla_g2
Create hunting rule
Link:
https://www.unpac.me/results/ddc6ffbd-20a6-4d23-80ad-2fd53e2c76bc/
Parent samples :
56201f646915a1f24dbb151b653b770290ca145e163999bc39a874bb174ec33b
133f62f51bdf46af75a3b9936457b473d8ec6b6d7b9df45851e5f06cf85c83da
466465672c119069b4414ad9a4bdf57ba08ad96851896e59562f32aa4b741d4d
086aa77498216f0c38c4318eb624819e6f79bc02194c4f90858da208b1572160
a91d29734ec4f9d8738c14872805f7e3d16898f45988a8502813988ab5c80bd0
b539f1f7156011eee9786885843a4fa5a3329cfafb00b07424bd3ead34d8d1d9
SH256 hash:
2fc6e7a93e0fbed4e6ca48c98af13c7339db7bff52a1bdce39b1c83c8e453878
MD5 hash:
af053f732b77a9c89118b0e73d2dd656
SHA1 hash:
64b34d32f5dca8ec21ffeceebe6d6c9dfc562c4d
Link:
https://www.unpac.me/results/ddc6ffbd-20a6-4d23-80ad-2fd53e2c76bc/
SH256 hash:
a91d29734ec4f9d8738c14872805f7e3d16898f45988a8502813988ab5c80bd0
MD5 hash:
4b01dc60f5724ff6340347a633688ba4
SHA1 hash:
421b93d80598440e9f4a8c465a0a95ef0f998028
Link:
https://www.unpac.me/results/ddc6ffbd-20a6-4d23-80ad-2fd53e2c76bc/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/a91d29734ec4/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/a91d29734ec4f9d8738c14872805f7e3d16898f45988a8502813988ab5c80bd0

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:Multifamily_RAT_Detection
Create hunting rule
Author:Lucas Acha (http://www.lukeacha.com)
Description:Generic Detection for multiple RAT families, PUPs, Packers and suspicious executables
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 ba4076337b0d0670cb01c9dd326ba48a0def62d976e1ab4114ed83c0865b8da7

AgentTesla

Executable exe a91d29734ec4f9d8738c14872805f7e3d16898f45988a8502813988ab5c80bd0

(this sample)

  
Delivery method
Other
  
Dropped by
SHA256 ba4076337b0d0670cb01c9dd326ba48a0def62d976e1ab4114ed83c0865b8da7
Cape
Cape
https://www.capesandbox.com/analysis/457819/
  
Dropped by
MD5 03f6a98fa40b2380ce40b4c992929d0f

Comments