MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b858cc21f6276c7518a9c7f1fc92d2ae8f432ace4359744dbcf92e0ddeffa3ed. 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: 14


Intelligence 14 IOCs YARA 9 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b858cc21f6276c7518a9c7f1fc92d2ae8f432ace4359744dbcf92e0ddeffa3ed
SHA3-384 hash: fe7c2b62fb0688cd4b5377a1e2a6167167903950a920288e15fd1b670735d22aba5336790fd6019e9708a1ae9c322781
SHA1 hash: ab75a86fa951c4620afb4c88be8d70dc357fc548
MD5 hash: bded29ccd65af3067fc52b8911c08e0b
humanhash: sierra-muppet-asparagus-arkansas
File name:libcares-2.dll
Download: download sample
Signature AgentTesla
Create hunting rule
File size:3'445'248 bytes
First seen:2025-05-19 15:14:36 UTC
Last seen:2025-05-27 10:37:22 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 56b579530b9031df07d096a26f95fc65 (1 x AgentTesla)
ssdeep 49152:XUmsF82LkPC8ShjzZF7CPM+EgY4mvZFBYptQH1u8AYGB459F:gcCzZFvgY4OflAQ
Threatray 64 similar samples on MalwareBazaar
TLSH T137F5BE15E3A404B5E83BCB38CA269333D6B079925731D44F0A58E6152F73EA29B3F716
TrID 48.7% (.EXE) Win64 Executable (generic) (10522/11/4)
23.3% (.EXE) Win16 NE executable (generic) (5038/12/1)
9.3% (.EXE) OS/2 Executable (generic) (2029/13)
9.2% (.EXE) Generic Win/DOS Executable (2002/3)
9.2% (.EXE) DOS Executable Generic (2000/1)
Magika pebin
Reporter lowmal3
Tags:AgentTesla exe

Intelligence

File Origin
# of uploads :
5
# of downloads :
596
Origin country :
DE DE
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
libcares-2.dll
Verdict:
No threats detected
Analysis date:
2025-05-19 15:15:22 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/467ef3be-2af9-4daa-8f68-ae48bdb14cf9

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.W64.GenKryptik.HFPH.tr.17698.4419.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
99.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=682b4b13e5aa44ec2e1af804
Tags:
agensla virus sage
Result
Verdict:
Clean
Maliciousness:
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
adaptive-context crypto fingerprint masquerade microsoft_visual_cc packed
Link:
https://www.filescan.io/uploads/682b4b0ec609634bd7c95379/reports/46360316-7236-4860-87c1-1ef3987edd74/overview
Verdict:
Malicious
Labled as:
W64/Agent.KHK.gen
Link:
https://www.hybrid-analysis.com/sample/b858cc21f6276c7518a9c7f1fc92d2ae8f432ace4359744dbcf92e0ddeffa3ed
Malware family:
Rhadamanthys
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/e999f900-9687-4e74-82ec-1d9142bfa32e
Result
Threat name:
n/a
Detection:
malicious
Classification:
n/a
Score:
52 / 100
Link:
https://www.joesandbox.com/analysis/1694119
Signature
Joe Sandbox ML detected suspicious sample
Multi AV Scanner detection for submitted file
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1694119 Sample: libcares-2.dll.exe Startdate: 19/05/2025 Architecture: WINDOWS Score: 52 34 Multi AV Scanner detection for submitted file 2->34 36 Joe Sandbox ML detected suspicious sample 2->36 8 loaddll64.exe 1 2->8         started        process3 process4 10 cmd.exe 1 8->10         started        12 rundll32.exe 1 8->12         started        14 rundll32.exe 1 8->14         started        16 34 other processes 8->16 process5 18 rundll32.exe 1 10->18         started        20 conhost.exe 12->20         started        22 conhost.exe 14->22         started        24 conhost.exe 16->24         started        26 conhost.exe 16->26         started        28 conhost.exe 16->28         started        30 20 other processes 16->30 process6 32 conhost.exe 18->32         started       
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/b858cc21f6276c7518a9c7f1fc92d2ae8f432ace4359744dbcf92e0ddeffa3ed
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b858cc21f6276c7518a9c7f1fc92d2ae8f432ace4359744dbcf92e0ddeffa3ed/
Threat name:
Win64.Trojan.GenSteal
Create hunting rule
Status:
Malicious
First seen:
2025-05-19 13:10:55 UTC
File Type:
PE+ (Dll)
AV detection:
18 of 37 (48.65%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=xbmmyipwe5whkgfjy7y7zewsv2hugkwoinmxitn47exa3xx7upwq._file
Verdict:
malicious
Label(s):
agenttesla
Create hunting rule
Similar samples:
23f7643c8a2ab3ba290bf4da1e34e6d5f3ffb0777b9f48cda6cfc917ce9452f6
AgentTesla
2bfbfbbdf7e25b14eff30cc07c26813e412260bc1dae49031267d67178c50cf4
AgentTesla
8e14732c4370171a9dcc75184b3a0d4676b1458782f78181238e896af3b8c412
AgentTesla
b858cc21f6276c7518a9c7f1fc92d2ae8f432ace4359744dbcf92e0ddeffa3ed
AgentTesla
c6d9affaba88cac0a3b23f8c7b888e43ecfa251e8f0bff8f430329714ba0730e
AgentTesla
cfe3100ff8dfe286be11b889ec8ca0a14211d56651469114ee5f440d8ff3e5a6
AgentTesla
error
AgentTesla
+ 54 additional samples on MalwareBazaar
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
family:agenttesla discovery keylogger spyware stealer trojan
Link:
https://tria.ge/reports/250519-sm4c1azpy4/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Looks up external IP address via web service
Checks computer location settings
AgentTesla
Agenttesla family
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/501dc82c-34fd-4ac7-bc5c-084f839bf03f
Unpacked files
SH256 hash:
b858cc21f6276c7518a9c7f1fc92d2ae8f432ace4359744dbcf92e0ddeffa3ed
MD5 hash:
bded29ccd65af3067fc52b8911c08e0b
SHA1 hash:
ab75a86fa951c4620afb4c88be8d70dc357fc548
Link:
https://www.unpac.me/results/093791fa-a6e6-48ad-85ab-aebd39e007ce/
Malware family:
AgentTesla
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b858cc21f627/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/b858cc21f6276c7518a9c7f1fc92d2ae8f432ace4359744dbcf92e0ddeffa3ed

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:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__MemoryWorkingSet
Create hunting rule
Author:Fernando Mercês
Description:Anti-debug process memory working set size check
Reference:http://www.gironsec.com/blog/2015/06/anti-debugger-trick-quicky/
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:pe_detect_tls_callbacks
Create hunting rule
Rule name:RIPEMD160_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:SEH__vectored
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:SHA1_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA1 constants
Rule name:ThreadControl__Context
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

File information

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

Malspam

AgentTesla

Executable exe b858cc21f6276c7518a9c7f1fc92d2ae8f432ace4359744dbcf92e0ddeffa3ed

(this sample)

  
Delivery method
Distributed via e-mail attachment

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 (GUARD_CF)high
Reviews
IDCapabilitiesEvidence
SECURITY_BASE_APIUses Security Base APIADVAPI32.dll::AdjustTokenPrivileges
WIN32_PROCESS_APICan Create Process and ThreadsADVAPI32.dll::OpenProcessToken
KERNEL32.dll::OpenProcess
KERNEL32.dll::VirtualAllocExNuma
KERNEL32.dll::CloseHandle
KERNEL32.dll::CreateThreadpoolIo
KERNEL32.dll::CreateThread
WIN_BASE_APIUses Win Base APIKERNEL32.dll::TerminateProcess
KERNEL32.dll::DeleteVolumeMountPointW
KERNEL32.dll::LoadLibraryExW
KERNEL32.dll::LoadLibraryA
KERNEL32.dll::GetSystemInfo
WIN_BASE_EXEC_APICan Execute other programsKERNEL32.dll::AllocConsole
KERNEL32.dll::WriteConsoleW
KERNEL32.dll::FreeConsole
KERNEL32.dll::ReadConsoleW
KERNEL32.dll::GetConsoleMode
KERNEL32.dll::GetConsoleOutputCP
WIN_BASE_IO_APICan Create FilesKERNEL32.dll::CopyFileExW
KERNEL32.dll::CreateDirectoryW
KERNEL32.dll::CreateFileW
KERNEL32.dll::DeleteFileW
KERNEL32.dll::GetSystemDirectoryW
KERNEL32.dll::RemoveDirectoryW
WIN_BASE_USER_APIRetrieves Account InformationADVAPI32.dll::LookupPrivilegeValueW
WIN_BCRYPT_APICan Encrypt Filesbcrypt.dll::BCryptCreateHash
bcrypt.dll::BCryptDestroyHash
bcrypt.dll::BCryptFinishHash
bcrypt.dll::BCryptGenRandom
bcrypt.dll::BCryptGetProperty
bcrypt.dll::BCryptHashData
WIN_REG_APICan Manipulate Windows RegistryADVAPI32.dll::RegOpenKeyExW
ADVAPI32.dll::RegQueryValueExW
ADVAPI32.dll::RegSetValueExW
WIN_SOCK_APIUses Network to send and receive dataWS2_32.dll::FreeAddrInfoW
WS2_32.dll::GetAddrInfoW
WS2_32.dll::WSASocketW

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