MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 837fbe9b83e066eb57abc2f94a7bbfa1ce5c6189bdea605a9c74bbb11cdab57a. 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 14 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 837fbe9b83e066eb57abc2f94a7bbfa1ce5c6189bdea605a9c74bbb11cdab57a
SHA3-384 hash: f21fa5648e415f5abedf80aa2cad98c6ea8774ca12b073607cc89e4e06fb83af6714fa816c156d38e772badfcd876236
SHA1 hash: 88a60a7b15406d5fee25f5c174ad0547f6d8bca9
MD5 hash: eb34eabec4f015fb2c9d8949545dc480
humanhash: earth-uranus-blossom-venus
File name:1714480708c0b478fcfe2a9c5ac9405060e5d6c31d62088d19b4a4f608f7c744c9bb6a048c918.dat-decoded
Download: download sample
Signature AgentTesla
Create hunting rule
File size:246'272 bytes
First seen:2024-04-30 12:38:31 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'462 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 3072:ODRRf8ksE81CfQiJdfde3lPeSRsnL05Q+pQqOeV3:Oj8ksE81CfzVeJeTnLX+uqP
TLSH T119340F037E88EB15E5A83E3782EF2C2413B2B4C71673D20B5F49AB6614516936C7E72D
TrID 60.4% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.8% (.SCR) Windows screen saver (13097/50/3)
8.7% (.EXE) Win64 Executable (generic) (10523/12/4)
5.4% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.1% (.EXE) Win16 NE executable (generic) (5038/12/1)
Reporter abuse_ch
Tags:AgentTesla base64-decoded exe


Avatar
abuse_ch
Malware dropped as base64 encoded payload

Intelligence

File Origin
# of uploads :
1
# of downloads :
368
Origin country :
DE DE
Vendor Threat Intelligence
Malware family:
agenttesla
Create hunting rule
ID:
1
File name:
837fbe9b83e066eb57abc2f94a7bbfa1ce5c6189bdea605a9c74bbb11cdab57a.exe
Verdict:
Malicious activity
Analysis date:
2024-04-30 12:40:11 UTC
Tags:
evasion smtp exfiltration stealer agenttesla
Link:
https://app.any.run/tasks/8bfc5493-92fd-4a0a-ae13-abd09ed94318

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
Win.Packed.Msilperseus-9956591-0
Create hunting rule

Win.Packed.Generic-10003641-0
Create hunting rule

Win.Packed.Generic-10011753-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Using the Windows Management Instrumentation requests
Сreating synchronization primitives
DNS request
Connection attempt
Sending an HTTP GET request
Reading critical registry keys
Creating a window
Stealing user critical data
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/837fbe9b83e066eb57abc2f94a7bbfa1ce5c6189bdea605a9c74bbb11cdab57a
Malware family:
Agent Tesla
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/425ef0c0-281d-4371-a631-2b99bd5dee05
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1434065
Signature
Antivirus / Scanner detection for submitted sample
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
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
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)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Yara detected AgentTesla
Yara detected Generic Downloader
Behaviour
Behavior Graph:
Download SVG
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/837fbe9b83e066eb57abc2f94a7bbfa1ce5c6189bdea605a9c74bbb11cdab57a
Detection:
agenttesla
Create hunting rule
Link:
https://mwdb.cert.pl/sample/837fbe9b83e066eb57abc2f94a7bbfa1ce5c6189bdea605a9c74bbb11cdab57a/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2024-04-19 13:31:42 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
28 of 38 (73.68%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=qn735g4d4btowv5lyl4uu657uhhfyymjxxvgawu4os53chg2wv5a._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/240430-pvlw5sfb5w/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Looks up external IP address via web service
Reads user/profile data of local email clients
Reads user/profile data of web browsers
AgentTesla
Unpacked files
SH256 hash:
837fbe9b83e066eb57abc2f94a7bbfa1ce5c6189bdea605a9c74bbb11cdab57a
MD5 hash:
eb34eabec4f015fb2c9d8949545dc480
SHA1 hash:
88a60a7b15406d5fee25f5c174ad0547f6d8bca9
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/0b360809-98b2-4f0c-a294-649c9d1a0098/
Parent samples :
837fbe9b83e066eb57abc2f94a7bbfa1ce5c6189bdea605a9c74bbb11cdab57a
89d69f0365c11bc349cd92ad79cd3066b2225fe41dc2def83deef2661dea01a2
a745b4a8dbdad5c84183ce33793aac75423bdb99fd3a3fca646fbeb66e1059f2
9a31156b6d7eb6076d0bb4a2f593fc21be304aa9e559547e2ee4a6232608c35e
9897c1f7d4ecf7e68ba31bef6c909543d69c6bbd95a17d061f45ed13f4b92bfd
1723b52fb0a05e96e165eda1385729bc64d02ae86afaaa3d1661637ec2d27192
6c0748b811be208d404f519d342c5d63faa2e0dcfefe64131d6ed500285eb0f4
69b1e423fcc489f982d8aeae0cbeee56140b7d8a8810a8c98a7dee8424c00174
2fc7d83ec6fcdfaa540dd36add9c20c880ff865927530305d736af40c8bbce6c
142fb3857b4ca67fa862800dc443d4e405f419e1699d1c31de66d913ef038b15
ec0b5ee59f4421a87c7f912e1af5f27d9e1ae135ffdc07cdd646d1b877c8c6ec
f3b2e714a23ff2060a9f40f574727b5916363b45266653849d6aa5775a51f051
Malware family:
AgentTesla
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/837fbe9b83e0/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
AgentTesla
Score:
0.90
Link:
https://yomi.yoroi.company/submissions/837fbe9b83e066eb57abc2f94a7bbfa1ce5c6189bdea605a9c74bbb11cdab57a

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:AgentTeslaV5
Create hunting rule
Author:ClaudioWayne
Description:AgentTeslaV5 infostealer payload
Rule name:DebuggerCheck__RemoteAPI
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
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_SandboxHookingDLL
Create hunting rule
Author:ditekSHen
Description:Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion
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: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
Reference:https://www.elastic.co/security-labs/attack-chain-leads-to-xworm-and-agenttesla

File information

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

c0b478fcfe2a9c5ac9405060e5d6c31d62088d19b4a4f608f7c744c9bb6a048c

AgentTesla

Executable exe 837fbe9b83e066eb57abc2f94a7bbfa1ce5c6189bdea605a9c74bbb11cdab57a

(this sample)

  
Dropped by
SHA256 c0b478fcfe2a9c5ac9405060e5d6c31d62088d19b4a4f608f7c744c9bb6a048c
  
Dropped by
MD5 b7b7cf00b14133419aa1db47c60b36a3
  
URLhaus
https://urlhaus.abuse.ch/url/2832397/
  
Delivery method
Distributed via web download

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