MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4b2bfcdbd2235a917786405381129da36922bbbb3f0342fbe44eaad3760afaa5. 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: 9


Intelligence 9 IOCs YARA 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4b2bfcdbd2235a917786405381129da36922bbbb3f0342fbe44eaad3760afaa5
SHA3-384 hash: 08eac6ce165a8068a7f9df7b2ba13f5b6355b3042e033a56401c49b09b8abeed979a6c39cd32cfe169c1edff9b92450c
SHA1 hash: 6b58b9c15452ffe1a3178c79d77f0a93e8d0d0ad
MD5 hash: aa7a740a167d36f5ed71bb52478638d6
humanhash: louisiana-freddie-solar-virginia
File name:default.dat
Download: download sample
Signature Efimer
Create hunting rule
File size:14'281'966 bytes
First seen:2026-07-29 22:52:31 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash dcaf48c1f10b0efa0a4472200f3850ed (643 x Efimer, 60 x BlankGrabber, 23 x SalatStealer)
ssdeep 393216:b8FoPHL6mXElIC4xg/UmQXMCHWUjXFcuI3/PGTAI:bMoPHJX7C4xeDQXMb8XyH/O7
TLSH T1AEE633546BF122FEE4E3103C99A155E0E156B4690733C9FB07A0C6B96F5B2E09D3E326
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 e8e865e0d8e8ec5a (7 x Efimer)
Reporter aachum
Tags:ClickFix Efimer exe


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

Intelligence

File Origin
# of uploads :
1
# of downloads :
194
Origin country :
ES ES
Vendor Threat Intelligence
Malware configuration found for:
PyInstaller
Details
Link:
https://research.acce.ciphertechsolutions.com/results/5939fc3c-5de0-4654-b91e-4116d902e0bc/
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/76767/
Detection(s):
SecuriteInfo.com.Variant.Dropper.354.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a file in the %temp% subdirectories
Restart of the analyzed sample
Creating a window
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
anti-debug expand installer-heuristic lolbin masquerade microsoft_visual_cc overlay packed packed packed pyinstaller reconnaissance
Link:
https://www.filescan.io/uploads/6a6a8466484dfa201eefa37a/reports/8a0e9eda-28e4-41b0-8821-2b498ce6423b/overview
Verdict:
Malicious
Labled as:
Yogi.Generic
Link:
https://www.hybrid-analysis.com/sample/4b2bfcdbd2235a917786405381129da36922bbbb3f0342fbe44eaad3760afaa5
Verdict:
Malicious
File Type:
exe x64
First seen:
2026-07-29T20:30:00Z UTC
Last seen:
2026-07-31T00:42:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/4b2bfcdbd2235a917786405381129da36922bbbb3f0342fbe44eaad3760afaa5/results?tab=lookup
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/8696bb15-bd72-4a17-b4ec-a64eff4d1e95
Gathering data
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/4b2bfcdbd2235a917786405381129da36922bbbb3f0342fbe44eaad3760afaa5
Verdict:
inconclusive
YARA:
5 match(es)
Tags:
Executable PDB Path PE (Portable Executable) PE File Layout Win 64 Exe x64
Link:
https://app.malva.re/file/aa7a740a167d36f5ed71bb52478638d6
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4b2bfcdbd2235a917786405381129da36922bbbb3f0342fbe44eaad3760afaa5/
Threat name:
Win64.Trojan.Egairtigado
Create hunting rule
Status:
Malicious
First seen:
2026-07-29 22:53:30 UTC
File Type:
PE+ (Exe)
Extracted files:
482
AV detection:
22 of 38 (57.89%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=jmv7zw6sennjc54gibjyceu5unusfo53h4buf67ej2vng5qk7ksq._file
Result
Malware family:
n/a
Score:
  8/10
Tags:
execution pyarmor pyinstaller
Link:
https://tria.ge/reports/260729-2t6w5sthlg/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Executes a command shell one-liner
Loads dropped DLL
Command and Scripting Interpreter: PowerShell
Unpacked files
SH256 hash:
4b2bfcdbd2235a917786405381129da36922bbbb3f0342fbe44eaad3760afaa5
MD5 hash:
aa7a740a167d36f5ed71bb52478638d6
SHA1 hash:
6b58b9c15452ffe1a3178c79d77f0a93e8d0d0ad
Link:
https://www.unpac.me/results/6a02ff4d-b3ab-4cfd-9b29-0c713e38a689/
SH256 hash:
315f909a8873118b2683fc338778f1be4a08712b4cc05c7e69af786a061d72c7
MD5 hash:
92fb6f4963cb6134018dcc7be56bba24
SHA1 hash:
0e3c7de0e7f5c6bfbdbfcc6468dd1ca140f0870d
Link:
https://www.unpac.me/results/6a02ff4d-b3ab-4cfd-9b29-0c713e38a689/
SH256 hash:
36585912e5eaf83ba9fea0631534f690ccdc2d7ba91537166fe53e56c221e153
MD5 hash:
862f820c3251e4ca6fc0ac00e4092239
SHA1 hash:
ef96d84b253041b090c243594f90938e9a487a9a
Link:
https://www.unpac.me/results/6a02ff4d-b3ab-4cfd-9b29-0c713e38a689/
SH256 hash:
a5c6a329698490a035133433928d04368ce6285bb91a9d074fc285de4c9a32a4
MD5 hash:
16855ebef31c5b1ebe767f1c617645b3
SHA1 hash:
315521f3a748abfa35cd4d48e8dd09d0556d989b
Link:
https://www.unpac.me/results/6a02ff4d-b3ab-4cfd-9b29-0c713e38a689/
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/4b2bfcdbd2235a917786405381129da36922bbbb3f0342fbe44eaad3760afaa5

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 4b2bfcdbd2235a917786405381129da36922bbbb3f0342fbe44eaad3760afaa5

(this sample)

  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/76767/

Comments