MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ef6ce6a5f34ab55e4898cb9b895d9832d66f0b0c3757a4e446b42cf6967f7da8. 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


Vidar


Vendor detections: 16


Intelligence 16 IOCs YARA 22 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: ef6ce6a5f34ab55e4898cb9b895d9832d66f0b0c3757a4e446b42cf6967f7da8
SHA3-384 hash: b8f5a3db88e5d8e7d5d4d8dc07124461ebe19c28db04401cf072f199732d918ce880c76b99cf7b65154cbb728877750e
SHA1 hash: 8fc18735404940ae47cddfaeb1d5259bcb6de7e8
MD5 hash: cf0a119aa90c4caabea0b310d68a15e8
humanhash: montana-zebra-north-berlin
File name:file
Download: download sample
Signature Vidar
Create hunting rule
File size:203'264 bytes
First seen:2025-12-25 20:20:48 UTC
Last seen:2025-12-25 22:21:04 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 31e06ec6723bcc3b75c69a4521e4b8f5 (43 x Vidar)
ssdeep 6144:qcz5nwjsumtpUz0npGn1KJ1eNY8QXPTZrrMZ:qAnw8tpjnpGnkbOpQXlXM
TLSH T154141334A5E6F254C633B13D86DF22687546FD26F1A0D51B7BCB2CA78F0849E53863A0
TrID 58.0% (.EXE) UPX compressed Win64 Executable (70117/5/12)
22.3% (.EXE) UPX compressed Win32 Executable (27066/9/6)
8.7% (.EXE) Win64 Executable (generic) (10522/11/4)
4.1% (.EXE) Win16 NE executable (generic) (5038/12/1)
1.7% (.ICL) Windows Icons Library (generic) (2059/9)
Magika pebin
Reporter Bitsight
Tags:dropped-by-amadey exe fbf543 UPX vidar


Avatar
Bitsight
url: http://130.12.180.43/vidar/random.exe
File size (compressed) :203'264 bytes
File size (de-compressed) :580'096 bytes
Format:win64/pe
Unpacked file: 1d50fca32dc1d90ca0bca01a7e80c1350bfd325b93c632e9bfaee993929197f2

Intelligence

File Origin
# of uploads :
5
# of downloads :
92
Origin country :
US US
Vendor Threat Intelligence
Malware configuration found for:
PEPacker
Details
PEPacker
a UPX version number and an unpacked binary
Link:
https://research.acce.ciphertechsolutions.com/results/09ed0faf-6922-4a21-b9d5-892991d1f4de/
Malware family:
vidar
Create hunting rule
ID:
1
File name:
file
Verdict:
Malicious activity
Analysis date:
2025-12-25 20:28:51 UTC
Tags:
stealer stealc vidar xor-url generic upx
Link:
https://app.any.run/tasks/30db7ed5-5c16-4417-ab33-47c1d906def9

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/46106/
Verdict:
Malicious
Score:
97.4%
Link:
https://cyber-fortress.com/docs/result/index.php?id=694d9ccf01c7b4a8fe55cfeb
Tags:
ransomware obfuscated emotet small
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/ef6ce6a5f34ab55e4898cb9b895d9832d66f0b0c3757a4e446b42cf6967f7da8
Result
Gathering data
Verdict:
Malicious
File Type:
exe x64
First seen:
2025-12-25T11:37:00Z UTC
Last seen:
2025-12-25T12:46:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/ef6ce6a5f34ab55e4898cb9b895d9832d66f0b0c3757a4e446b42cf6967f7da8/results?tab=lookup
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/a86bc63b-3d7c-45b7-8215-ebb97725efdb
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/ef6ce6a5f34ab55e4898cb9b895d9832d66f0b0c3757a4e446b42cf6967f7da8
Verdict:
inconclusive
YARA:
4 match(es)
Tags:
Executable PE (Portable Executable) PE File Layout Win 64 Exe x64
Link:
https://app.malva.re/file/cf0a119aa90c4caabea0b310d68a15e8
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/ef6ce6a5f34ab55e4898cb9b895d9832d66f0b0c3757a4e446b42cf6967f7da8/
Verdict:
Malicious
Threat:
Family.STEALC
Link:
https://tip.neiki.dev/file/ef6ce6a5f34ab55e4898cb9b895d9832d66f0b0c3757a4e446b42cf6967f7da8
Threat name:
Win64.Trojan.Vidar
Create hunting rule
Status:
Malicious
First seen:
2025-12-25 20:21:23 UTC
File Type:
PE+ (Exe)
Extracted files:
3
AV detection:
21 of 36 (58.33%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=55wonjptjk2v4seyzonysxmygllg6cymg5l2jzcgwqwpnft7pwua._file
Result
Malware family:
vidar
Create hunting rule
Score:
  10/10
Tags:
family:vidar discovery spyware stealer upx
Link:
https://tria.ge/reports/251225-y44b8a1ncl/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of WriteProcessMemory
Browser Information Discovery
System Time Discovery
Drops file in Windows directory
Suspicious use of SetThreadContext
UPX packed file
Checks installed software on the system
Reads user/profile data of local email clients
Reads user/profile data of web browsers
Detects Vidar Stealer
Vidar
Vidar family
Verdict:
Malicious
Tags:
Stealc
YARA:
n/a
Link:
https://app.threat.zone/submission/ec020139-ebae-402e-971e-09f1bb63e052
Unpacked files
SH256 hash:
ef6ce6a5f34ab55e4898cb9b895d9832d66f0b0c3757a4e446b42cf6967f7da8
MD5 hash:
cf0a119aa90c4caabea0b310d68a15e8
SHA1 hash:
8fc18735404940ae47cddfaeb1d5259bcb6de7e8
Link:
https://www.unpac.me/results/a6e3fe69-bd78-4831-8e87-bd0696b1eca5/
SH256 hash:
1d50fca32dc1d90ca0bca01a7e80c1350bfd325b93c632e9bfaee993929197f2
MD5 hash:
ec582a1a9b57879e3fa451a5bd4c1425
SHA1 hash:
452544e18ad0d6749dd25a531b6132429cb1e162
Detections:
win_bazarbackdoor_auto
Create hunting rule
SUSP_XORed_URL_In_EXE
Create hunting rule
SUSP_XORed_Mozilla
Create hunting rule
Link:
https://www.unpac.me/results/a6e3fe69-bd78-4831-8e87-bd0696b1eca5/
Parent samples :
ef6ce6a5f34ab55e4898cb9b895d9832d66f0b0c3757a4e446b42cf6967f7da8
1d50fca32dc1d90ca0bca01a7e80c1350bfd325b93c632e9bfaee993929197f2
Malware family:
Vidar
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/ef6ce6a5f34a/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/ef6ce6a5f34ab55e4898cb9b895d9832d66f0b0c3757a4e446b42cf6967f7da8

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:CP_Script_Inject_Detector
Create hunting rule
Author:DiegoAnalytics
Description:Detects attempts to inject code into another process across PE, ELF, Mach-O binaries
Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__QueryInfo
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__RemoteAPI
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Active
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DetectEncryptedVariants
Create hunting rule
Author:Zinyth
Description:Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded
Rule name:dgaagas
Create hunting rule
Author:Harshit
Description:Uses certutil.exe to download a file named test.txt
Rule name:INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
Create hunting rule
Author:ditekSHen
Description:Detects Windows executables referencing non-Windows User-Agents
Rule name:RANSOMWARE
Create hunting rule
Author:ToroGuitar
Rule name:SUSP_XORed_Mozilla_Oct19
Create hunting rule
Author:Florian Roth
Description:Detects suspicious single byte XORed keyword 'Mozilla/5.0' - it uses yara's XOR modifier and therefore cannot print the XOR key. You can use the CyberChef recipe linked in the reference field to brute force the used key.
Reference:https://gchq.github.io/CyberChef/#recipe=XOR_Brute_Force()
Rule name:SUSP_XORed_Mozilla_RID2DB4
Create hunting rule
Author:Florian Roth
Description:Detects suspicious XORed keyword - Mozilla/5.0
Reference:Internal Research
Rule name:SUSP_XORed_URL_In_EXE
Create hunting rule
Author:Florian Roth (Nextron Systems)
Description:Detects an XORed URL in an executable
Reference:https://twitter.com/stvemillertime/status/1237035794973560834
Rule name:SUSP_XORed_URL_in_EXE_RID2E46
Create hunting rule
Author:Florian Roth
Description:Detects an XORed URL in an executable
Reference:https://twitter.com/stvemillertime/status/1237035794973560834
Rule name:Sus_CMD_Powershell_Usage
Create hunting rule
Author:XiAnzheng
Description:May Contain(Obfuscated or no) Powershell or CMD Command that can be abused by threat actor(can create FP)
Rule name:ThreadControl__Context
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:upx_largefile
Create hunting rule
Author:k3nr9
Rule name:win_bazarbackdoor_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.bazarbackdoor.

File information

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

Web download

Vidar

Executable exe ef6ce6a5f34ab55e4898cb9b895d9832d66f0b0c3757a4e446b42cf6967f7da8

(this sample)

Executable exe 1d50fca32dc1d90ca0bca01a7e80c1350bfd325b93c632e9bfaee993929197f2

  
Dropped by
Amadey
  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/3743615/
Cape
Cape
https://www.capesandbox.com/analysis/46106/
  
Dropping
SHA256 1d50fca32dc1d90ca0bca01a7e80c1350bfd325b93c632e9bfaee993929197f2
  
Dropping
MD5 ec582a1a9b57879e3fa451a5bd4c1425

Comments