MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 0494354b3b9b23161eeaddb054b6d9e1fbba3aa36ece11e000f7f09c2efa2ea7. 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: 8


Intelligence 8 IOCs YARA 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 0494354b3b9b23161eeaddb054b6d9e1fbba3aa36ece11e000f7f09c2efa2ea7
SHA3-384 hash: f40a51a9ef0e3d3b9059d840963cd4dd85e5bc97f1548c9c60669067b2746f3092eb675b4482bf73f80187efedd7bf79
SHA1 hash: 13b1f738c3f201e73e897105b2a7152a4b5e7105
MD5 hash: eff5f64df041513279fa2b87cf34806a
humanhash: lithium-fifteen-michigan-single
File name:default.dat
Download: download sample
Signature Efimer
Create hunting rule
File size:14'310'671 bytes
First seen:2026-07-24 22:52:09 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash dcaf48c1f10b0efa0a4472200f3850ed (493 x Efimer, 60 x BlankGrabber, 23 x SalatStealer)
ssdeep 393216:Ajqc8uJpaz7ZuV8wFGhSZnILzP1XMCHWUjXncuI3/PGTAI:AJbJpaXQV8w2MnUD1XMb8XcH/O7
TLSH T1BDE6330C9FE543FDE9B3413DECA66665E4A538754B32C4EB436883A4AF071E08837766
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 f0d88ea29ac6e4f0 (4 x Efimer)
Reporter aachum
Tags:ClickFix Efimer exe


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

Intelligence

File Origin
# of uploads :
1
# of downloads :
170
Origin country :
ES ES
Vendor Threat Intelligence
Malware configuration found for:
PyInstaller
Details
Link:
https://research.acce.ciphertechsolutions.com/results/b4ee0f3c-a55f-4b23-a97e-1bf68a202ab8/
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/76009/
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/6a63eca5b82e46a567985605/reports/045ed71f-6724-4b26-8cbc-c3bab46c2b52/overview
Verdict:
Malicious
Labled as:
Yogi.Generic
Link:
https://www.hybrid-analysis.com/sample/0494354b3b9b23161eeaddb054b6d9e1fbba3aa36ece11e000f7f09c2efa2ea7
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/bf7798df-ea07-4e3e-9798-57e94517abec
Gathering data
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/0494354b3b9b23161eeaddb054b6d9e1fbba3aa36ece11e000f7f09c2efa2ea7
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/0494354b3b9b23161eeaddb054b6d9e1fbba3aa36ece11e000f7f09c2efa2ea7/
Threat name:
Win64.Malware.Yogi
Create hunting rule
Status:
Malicious
First seen:
2026-07-24 22:53:39 UTC
File Type:
PE+ (Exe)
Extracted files:
482
AV detection:
9 of 36 (25.00%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=askdksz3tmrrmhxk3wyfjnwz4h53uovdn3hbdyaa67yjylx2f2tq._file
Result
Malware family:
n/a
Score:
  8/10
Tags:
execution pyarmor pyinstaller
Link:
https://tria.ge/reports/260724-2tlwzagn6y/
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:
0494354b3b9b23161eeaddb054b6d9e1fbba3aa36ece11e000f7f09c2efa2ea7
MD5 hash:
eff5f64df041513279fa2b87cf34806a
SHA1 hash:
13b1f738c3f201e73e897105b2a7152a4b5e7105
Link:
https://www.unpac.me/results/7fa17f56-01ee-4541-b51a-92bd0b1d13b5/
SH256 hash:
36585912e5eaf83ba9fea0631534f690ccdc2d7ba91537166fe53e56c221e153
MD5 hash:
862f820c3251e4ca6fc0ac00e4092239
SHA1 hash:
ef96d84b253041b090c243594f90938e9a487a9a
Link:
https://www.unpac.me/results/7fa17f56-01ee-4541-b51a-92bd0b1d13b5/
SH256 hash:
3bf8ade23d01fcfa171209ff815ab95196d9409bb0ceab5dc657dff4b9eafa62
MD5 hash:
2545899512fc01702e99ac5ec195b75e
SHA1 hash:
053c75939da966694a43b6ddac6b4538bdac6296
Link:
https://www.unpac.me/results/7fa17f56-01ee-4541-b51a-92bd0b1d13b5/
SH256 hash:
a5c6a329698490a035133433928d04368ce6285bb91a9d074fc285de4c9a32a4
MD5 hash:
16855ebef31c5b1ebe767f1c617645b3
SHA1 hash:
315521f3a748abfa35cd4d48e8dd09d0556d989b
Link:
https://www.unpac.me/results/7fa17f56-01ee-4541-b51a-92bd0b1d13b5/
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/0494354b3b9b23161eeaddb054b6d9e1fbba3aa36ece11e000f7f09c2efa2ea7

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 0494354b3b9b23161eeaddb054b6d9e1fbba3aa36ece11e000f7f09c2efa2ea7

(this sample)

  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/76009/

Comments