MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 75c3496ee243be07930a47bd8b2a34bec9fb5f956f60d3dbfcc798753c6a9421. 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: 15


Intelligence 15 IOCs YARA 13 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 75c3496ee243be07930a47bd8b2a34bec9fb5f956f60d3dbfcc798753c6a9421
SHA3-384 hash: 64fe9d921240c28224893723fbd3fcea92336c8f3435bc1a45589bd8b0014678bf236fda77b68c50365442aa2afbdbec
SHA1 hash: 070a6299d61893a65370296f306cd716cc847234
MD5 hash: 2f8a2b89a408c2e07c8086b0437dfc34
humanhash: michigan-fix-zulu-double
File name:Bz3TU0KR2wyKX1a.exe
Download: download sample
Signature AgentTesla
Create hunting rule
File size:657'920 bytes
First seen:2023-10-02 08:48:01 UTC
Last seen:2023-10-02 14:44:25 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'661 x AgentTesla, 19'474 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 12288:P5FcbKrBL6p3zDStog1MfBhXrwtHZQXtfemBPg1aYgJeNumB0:AKrN6p3aDqBVwleXddBPg1zgTy
Threatray 3'962 similar samples on MalwareBazaar
TLSH T172E42321726EA6A5EA89CB34042165649B3A7F5B0C93D30CAE4071EFCF72B439251F73
TrID 63.0% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
11.2% (.SCR) Windows screen saver (13097/50/3)
9.0% (.EXE) Win64 Executable (generic) (10523/12/4)
5.6% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
3.8% (.EXE) Win32 Executable (generic) (4505/5/1)
Reporter cocaman
Tags:AgentTesla exe

Intelligence

File Origin
# of uploads :
2
# of downloads :
302
Origin country :
CH CH
Vendor Threat Intelligence
Malware family:
agenttesla
Create hunting rule
ID:
1
File name:
Bz3TU0KR2wyKX1a.exe
Verdict:
Malicious activity
Analysis date:
2023-10-02 09:01:57 UTC
Tags:
stealer agenttesla
Link:
https://app.any.run/tasks/f4e6b9cb-320c-48fc-a6cf-b88835d4bc6f

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/452580/
Detection(s):
Porcupine.Malware.58887.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
DNS request
Unauthorized injection to a recently created process
Restart of the analyzed sample
Creating a file
Using the Windows Management Instrumentation requests
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
packed
Link:
https://www.filescan.io/uploads/651a83c31edabd9982a2ef22/reports/3cd3cf26-9b6f-49f9-b074-d8a5ec985e81/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_70%
Link:
https://www.hybrid-analysis.com/sample/75c3496ee243be07930a47bd8b2a34bec9fb5f956f60d3dbfcc798753c6a9421
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/a4d4f3d0-190b-45b3-84a5-7bf0cef77622
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1317801
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code contains potential unpacker
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)
May check the online IP address of the machine
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)
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 the Telegram API (likely for C&C communication)
Yara detected AgentTesla
Yara detected Generic Downloader
Yara detected Telegram RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1317801 Sample: Bz3TU0KR2wyKX1a.exe Startdate: 02/10/2023 Architecture: WINDOWS Score: 100 44 Found malware configuration 2->44 46 Malicious sample detected (through community Yara rule) 2->46 48 Multi AV Scanner detection for submitted file 2->48 50 8 other signatures 2->50 6 Bz3TU0KR2wyKX1a.exe 3 2->6         started        9 BsrzRc.exe 3 2->9         started        11 BsrzRc.exe 2 2->11         started        process3 signatures4 52 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 6->52 54 May check the online IP address of the machine 6->54 56 Injects a PE file into a foreign processes 6->56 13 Bz3TU0KR2wyKX1a.exe 17 5 6->13         started        58 Multi AV Scanner detection for dropped file 9->58 60 Machine Learning detection for dropped file 9->60 18 BsrzRc.exe 14 2 9->18         started        20 BsrzRc.exe 11->20         started        22 BsrzRc.exe 11->22         started        24 BsrzRc.exe 11->24         started        process5 dnsIp6 30 api4.ipify.org 64.185.227.156, 443, 49796 WEBNXUS United States 13->30 32 api.telegram.org 149.154.167.220, 443, 49797, 49798 TELEGRAMRU United Kingdom 13->32 34 api.ipify.org 13->34 26 C:\Users\user\AppData\Roaming\...\BsrzRc.exe, PE32 13->26 dropped 28 C:\Users\user\...\BsrzRc.exe:Zone.Identifier, ASCII 13->28 dropped 62 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 13->62 64 Tries to steal Mail credentials (via file / registry access) 13->64 66 Hides that the sample has been downloaded from the Internet (zone.identifier) 13->66 36 173.231.16.77, 443, 49799 WEBNXUS United States 18->36 38 api.ipify.org 18->38 40 104.237.62.212, 443, 49802 WEBNXUS United States 20->40 42 api.ipify.org 20->42 68 Tries to harvest and steal browser information (history, passwords, etc) 20->68 file7 signatures8
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/75c3496ee243be07930a47bd8b2a34bec9fb5f956f60d3dbfcc798753c6a9421/
Threat name:
ByteCode-MSIL.Trojan.Vigorf
Create hunting rule
Status:
Malicious
First seen:
2023-10-02 08:11:54 UTC
File Type:
PE (.Net Exe)
Extracted files:
24
AV detection:
19 of 23 (82.61%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=oxbus3xcio7apeyki66ywkrux3e7wx4vn5qnhw74y6mhkpdksqqq._file
Verdict:
malicious
Label(s):
agenttesla
Create hunting rule
Similar samples:
0331ca586f68e8a853e9030635f249dba8337da5ef7c29521c373807fcce1a6f
AgentTesla
113e16425e010952150f3c1f7ae615602cd4ca30826b0e7518aa058341058a94
AgentTesla
2628313da5e34653481666207066dd34c810d7285cebf4b1ecea700ba8aed211
AgentTesla
3ca46cbfdb8930e476e9452091a56cf37a28f848a88435463c6b08c787ea59ad
AgentTesla
59b1624b294226b93b186dc503efd7c48937542eec03b0d32d27034729c2a733
AgentTesla
6a671ca18a4f031900726988ad33a3675fc4c78d13f4138141a641852948c7f8
AgentTesla
83cfc425e31898223c5cfb0fbb28fb89e6ba02386a5719170869ae974b479f2b
AgentTesla
984be8706b65a53d26f032b9471751943cbf5e35d8c4baabcac153053949e283
AgentTesla
c6a0026a78d283724646d2cd5db9fa459a0bd306e19e50c6c23826603b6438df
AgentTesla
d85278c4099b913c69779c4b69a0c85cbb0d7cbe72ae9a324b798a0fd2e02fb7
AgentTesla
+ 3'952 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  7/10
Tags:
persistence spyware stealer
Link:
https://tria.ge/reports/231002-kqe6ksge21/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Adds Run key to start application
Looks up external IP address via web service
Reads data files stored by FTP clients
Reads user/profile data of local email clients
Reads user/profile data of web browsers
Unpacked files
SH256 hash:
3f79f038e90d9bf10ed9a3ec40c13346504f5b58563ff1ade4e8e0f87ef8a1f8
MD5 hash:
b859f9bf32efa4ad0c621e3613ecc673
SHA1 hash:
ef2107c5c36fbe566945f41be2127f73a76949ad
Detections:
win_agent_tesla_g2
Create hunting rule
Link:
https://www.unpac.me/results/1de76f4b-c3cb-4746-a5fe-f7fe1bd42182/
SH256 hash:
d60dec072f893a5f398ba30e3a15cb61570cb724c19751afeb2c4c659b59622a
MD5 hash:
8c865d459cbe885b9611d339deb8d457
SHA1 hash:
de13418769a5c9a2cc0050abebc928dfa7b789f1
Link:
https://www.unpac.me/results/1de76f4b-c3cb-4746-a5fe-f7fe1bd42182/
SH256 hash:
3d8350caa387cd38438fd897879e265d7cc13fc379534cf44ce723ce0b688446
MD5 hash:
51f2a3b467d33401258998ae436ba4ab
SHA1 hash:
94376d111d7a94cea9ee79f95978550a2b44e318
Link:
https://www.unpac.me/results/1de76f4b-c3cb-4746-a5fe-f7fe1bd42182/
SH256 hash:
ca4c485ff9d2d4c93bbe68ecd841820ec23efbfbf2fdd8319307a24363180fe3
MD5 hash:
c925869461f40e12c22d5aa3f5a0635a
SHA1 hash:
74fbd98d422d181c0382932d40a115debcdc34d4
Link:
https://www.unpac.me/results/1de76f4b-c3cb-4746-a5fe-f7fe1bd42182/
SH256 hash:
3fd0bedc0411d2ef09bb38f50a70888b9db436aa3f1a3f6340b3957a8bf1cef3
MD5 hash:
f7e3ee72e28761ebde68a3d0e2aeea6f
SHA1 hash:
102da2e7659210602f3ccfbb7768d8478428a565
Link:
https://www.unpac.me/results/1de76f4b-c3cb-4746-a5fe-f7fe1bd42182/
SH256 hash:
75c3496ee243be07930a47bd8b2a34bec9fb5f956f60d3dbfcc798753c6a9421
MD5 hash:
2f8a2b89a408c2e07c8086b0437dfc34
SHA1 hash:
070a6299d61893a65370296f306cd716cc847234
Link:
https://www.unpac.me/results/1de76f4b-c3cb-4746-a5fe-f7fe1bd42182/
Malware family:
AgentTesla
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/75c3496ee243/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.61
Link:
https://yomi.yoroi.company/submissions/75c3496ee243be07930a47bd8b2a34bec9fb5f956f60d3dbfcc798753c6a9421

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: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: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

rar 55e46c749d6a301419f2660d3092e7cc4ab3f265b43622e0feef5b5603236548

AgentTesla

Executable exe 75c3496ee243be07930a47bd8b2a34bec9fb5f956f60d3dbfcc798753c6a9421

(this sample)

  
Delivery method
Other
  
Dropped by
SHA256 55e46c749d6a301419f2660d3092e7cc4ab3f265b43622e0feef5b5603236548
Cape
Cape
https://www.capesandbox.com/analysis/452580/
  
Dropped by
MD5 59985a54b5eccacc0ca366ac588aefbb

Comments