MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4ae4d4f2faf96941187abdf2d292b4ce995ecc94dc68f8e7d4e0e49747caed6d. 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


Efimer


Vendor detections: 12


Intelligence 12 IOCs YARA 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4ae4d4f2faf96941187abdf2d292b4ce995ecc94dc68f8e7d4e0e49747caed6d
SHA3-384 hash: fa8937007cb22a65e2aabdf7b068687532e1278a42e873a547dba0351a7bb27cfcad4048f48b012c5f3ceecca891a8dd
SHA1 hash: fc778892bd31ad42e967890ca0d4e2a661897841
MD5 hash: 6bedd45f963b7f078071bb6eeb1edcae
humanhash: oklahoma-blossom-don-florida
File name:default.dat
Download: download sample
Signature Efimer
Create hunting rule
File size:14'297'531 bytes
First seen:2026-07-04 03:47:58 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash dcaf48c1f10b0efa0a4472200f3850ed (60 x BlankGrabber, 33 x Efimer, 22 x NetSupport)
ssdeep 393216:SsYkXVJgsRfKe9AbXMCHWUjXocuI3/PGTAI:SsdVnJKe9AbXMb8XdH/O7
TLSH T197E6331896D411EEE2B38638FED26DA5E4A978610371C6CF1FA447D12E632E08D3D637
TrID 37.0% (.EXE) Win64 Executable (generic) (6522/11/2)
28.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
11.5% (.EXE) OS/2 Executable (generic) (2029/13)
11.3% (.EXE) Generic Win/DOS Executable (2002/3)
11.3% (.EXE) DOS Executable (generic) (2000/1)
Magika pebin
dhash icon 71f8fcdccce4f071 (3 x Efimer)
Reporter aachum
Tags:ClickFix Efimer exe


Avatar
iamaachum
https://tuasesoriadigital.es/default.dat

Intelligence

File Origin
# of uploads :
1
# of downloads :
147
Origin country :
ES ES
Vendor Threat Intelligence
Malware configuration found for:
PyInstaller
Details
Link:
https://research.acce.ciphertechsolutions.com/results/ffdf12ff-022d-4601-9b41-305c9d492e02/
Malware family:
n/a
ID:
1
File name:
default.dat
Verdict:
No threats detected
Analysis date:
2026-07-04 03:33:08 UTC
Tags:
ransomware
Link:
https://app.any.run/tasks/d1a4a9df-27c9-4fd5-92f7-279284a94ae0

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/72785/
Detection(s):
SecuriteInfo.com.Variant.Dropper.354.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
90.2%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6a487eee32952f8351cf8b79
Tags:
installer shell sage
Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a file in the %temp% subdirectories
Restart of the analyzed sample
Creating a window
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-debug dropper expand installer-heuristic lolbin masquerade microsoft_visual_cc overlay packed packed packed pyinstaller reconnaissance
Link:
https://www.filescan.io/uploads/6a4882971e5213f5c749e9fa/reports/2bd0da57-5340-4723-86a6-29941015b738/overview
Verdict:
Malicious
Labled as:
Yogi.Generic
Link:
https://www.hybrid-analysis.com/sample/4ae4d4f2faf96941187abdf2d292b4ce995ecc94dc68f8e7d4e0e49747caed6d
Verdict:
Malicious
File Type:
exe x64
First seen:
2026-07-04T00:38:00Z UTC
Last seen:
2026-07-04T00:38:00Z UTC
Hits:
~10
Detections:
Trojan-PSW.Win32.Coins.sb Trojan-PSW.MSIL.Stealer.sb HEUR:Trojan.Python.Agent.gen HEUR:Trojan-PSW.Python.Agent.gen
Link:
https://opentip.kaspersky.com/4ae4d4f2faf96941187abdf2d292b4ce995ecc94dc68f8e7d4e0e49747caed6d/results?tab=lookup
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/1e82da9c-b824-4837-b7d0-9f2a2f58ec97
Result
Threat name:
n/a
Detection:
malicious
Classification:
evad
Score:
76 / 100
Link:
https://www.joesandbox.com/analysis/1937369
Signature
Adds a directory exclusion to Windows Defender
Contains functionality to infect the boot sector
Found pyInstaller with non standard icon
Joe Sandbox ML detected suspicious sample
Loading BitLocker PowerShell Module
Multi AV Scanner detection for submitted file
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Sigma detected: Suspicious Script Execution From Temp Folder
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1937369 Sample: default.dat.exe Startdate: 04/07/2026 Architecture: WINDOWS Score: 76 51 Multi AV Scanner detection for submitted file 2->51 53 Joe Sandbox ML detected suspicious sample 2->53 55 Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet 2->55 57 Sigma detected: Suspicious Script Execution From Temp Folder 2->57 8 default.dat.exe 31 2->8         started        process3 file4 43 C:\Users\user\AppData\...\unicodedata.pyd, PE32+ 8->43 dropped 45 C:\Users\user\AppData\Local\...\select.pyd, PE32+ 8->45 dropped 47 C:\Users\user\AppData\Local\...\python313.dll, PE32+ 8->47 dropped 49 15 other files (none is malicious) 8->49 dropped 61 Contains functionality to infect the boot sector 8->61 63 Adds a directory exclusion to Windows Defender 8->63 65 Found pyInstaller with non standard icon 8->65 12 default.dat.exe 1 8->12         started        signatures5 process6 signatures7 67 Adds a directory exclusion to Windows Defender 12->67 15 cmd.exe 1 12->15         started        18 cmd.exe 1 12->18         started        20 cmd.exe 1 12->20         started        22 9 other processes 12->22 process8 signatures9 69 Adds a directory exclusion to Windows Defender 15->69 24 powershell.exe 23 15->24         started        27 conhost.exe 15->27         started        29 powershell.exe 23 18->29         started        31 conhost.exe 18->31         started        33 powershell.exe 23 20->33         started        35 conhost.exe 20->35         started        37 powershell.exe 22->37         started        39 powershell.exe 22->39         started        41 16 other processes 22->41 process10 signatures11 59 Loading BitLocker PowerShell Module 24->59
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/4ae4d4f2faf96941187abdf2d292b4ce995ecc94dc68f8e7d4e0e49747caed6d
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4ae4d4f2faf96941187abdf2d292b4ce995ecc94dc68f8e7d4e0e49747caed6d/
Verdict:
Malicious
Threat:
Trojan.Python.Agent
Link:
https://tip.neiki.dev/file/4ae4d4f2faf96941187abdf2d292b4ce995ecc94dc68f8e7d4e0e49747caed6d
Threat name:
Win64.Malware.Yogi
Create hunting rule
Status:
Malicious
First seen:
2026-07-04 03:33:06 UTC
File Type:
PE+ (Exe)
Extracted files:
482
AV detection:
8 of 36 (22.22%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=jlsnj4x27fuucgd2xxznfevuz2mv5teu3ruprz6u4dsjor6k5vwq._file
Result
Malware family:
n/a
Score:
  8/10
Tags:
execution pyarmor pyinstaller
Link:
https://tria.ge/reports/260704-ec4zwsey8r/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Loads dropped DLL
Command and Scripting Interpreter: PowerShell
Unpacked files
SH256 hash:
4ae4d4f2faf96941187abdf2d292b4ce995ecc94dc68f8e7d4e0e49747caed6d
MD5 hash:
6bedd45f963b7f078071bb6eeb1edcae
SHA1 hash:
fc778892bd31ad42e967890ca0d4e2a661897841
Link:
https://www.unpac.me/results/b69e1a75-2dbd-4a5d-8a23-3bd5307054c5/
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/4ae4d4f2faf96941187abdf2d292b4ce995ecc94dc68f8e7d4e0e49747caed6d

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:DebuggerException__SetConsoleCtrl
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:Detect_PyInstaller
Create hunting rule
Author:Obscurity Labs LLC
Description:Detects PyInstaller compiled executables across platforms
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:PyInstaller
Create hunting rule
Author:@bartblaze
Description:Identifies executable converted using PyInstaller. This rule by itself does NOT necessarily mean the detected file is malicious.
Rule name:TH_AntiVM_MassHunt_Win_Malware_2026_CYFARE
Create hunting rule
Author:CYFARE
Description:Detects Windows malware employing anti-VM / anti-sandbox evasion techniques across VMware, VirtualBox, Hyper-V, QEMU, Xen, and generic sandbox environments
Reference:https://cyfare.net/
Rule name:upxHook
Create hunting rule
Author:@r3dbU7z
Description:Detect artifacts from 'upxHook' - modification of UPX packer
Reference:https://bazaar.abuse.ch/sample/6352be8aa5d8063673aa428c3807228c40505004320232a23d99ebd9ef48478a/

File information

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

Web download

Efimer

Executable exe 4ae4d4f2faf96941187abdf2d292b4ce995ecc94dc68f8e7d4e0e49747caed6d

(this sample)

  
Link
https://tria.ge/260704-dxsa6aaw6w/behavioral2
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/72785/

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