MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 36e8a488df3ed19cc2f393271814f04569bd1f63fd32349ad13c533f6421e9ce. 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: 11


Intelligence 11 IOCs YARA 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 36e8a488df3ed19cc2f393271814f04569bd1f63fd32349ad13c533f6421e9ce
SHA3-384 hash: ea86921d54ad70c3c5ba26e7cc9a3129dfb4452a8d2318c170bbf7392366b422106793e7643c1a7ca765a64ad5d84852
SHA1 hash: 05d359cb2de06e7cbb1c336d33ce4f0e3071fdb6
MD5 hash: eeb1d2d5f588e18ced050255403a41c4
humanhash: hot-eighteen-sixteen-twenty
File name:default.dat
Download: download sample
Signature Efimer
Create hunting rule
File size:14'316'829 bytes
First seen:2026-07-19 21:52:09 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash dcaf48c1f10b0efa0a4472200f3850ed (716 x Efimer, 60 x BlankGrabber, 23 x SalatStealer)
ssdeep 393216:94YSlOp8OEQbQ5F26Ae1uKACVeXMCHWUjXicuI3/PGTAI:92kbQ51AekrXMb8XfH/O7
TLSH T160E63328A6D002FEF6734038EED2659ADAA5B46917B2C5CF5B6887D15E031F0CD39723
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 71f0d0d8c8e8f070 (1 x Efimer)
Reporter aachum
Tags:ClickFix Efimer exe


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

Intelligence

File Origin
# of uploads :
1
# of downloads :
160
Origin country :
ES ES
Vendor Threat Intelligence
Malware configuration found for:
PyInstaller
Details
Link:
https://research.acce.ciphertechsolutions.com/results/1db648bd-c040-4059-a163-c53bbf4e6b17/
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/75222/
Detection(s):
SecuriteInfo.com.Variant.Dropper.354.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
97.4%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6a5d471dbcffb2c48cb79544
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:
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/6a5d4717216d45e60974c92a/reports/b9647d26-46f9-42b7-9168-7baf229c80d4/overview
Verdict:
Malicious
Labled as:
Yogi.Generic
Link:
https://www.hybrid-analysis.com/sample/36e8a488df3ed19cc2f393271814f04569bd1f63fd32349ad13c533f6421e9ce
Verdict:
Malicious
File Type:
exe x64
First seen:
2026-07-19T19:08:00Z UTC
Last seen:
2026-07-21T01:23:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/36e8a488df3ed19cc2f393271814f04569bd1f63fd32349ad13c533f6421e9ce/results?tab=lookup
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/91173911-6f77-4106-afdb-937156a960e5
Result
Threat name:
n/a
Detection:
malicious
Classification:
evad
Score:
76 / 100
Link:
https://www.joesandbox.com/analysis/1944896
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: 1944896 Sample: default.dat.exe Startdate: 20/07/2026 Architecture: WINDOWS Score: 76 56 Multi AV Scanner detection for submitted file 2->56 58 Joe Sandbox ML detected suspicious sample 2->58 60 Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet 2->60 62 Sigma detected: Suspicious Script Execution From Temp Folder 2->62 9 default.dat.exe 31 2->9         started        process3 file4 46 C:\Users\user\AppData\...\unicodedata.pyd, PE32+ 9->46 dropped 48 C:\Users\user\AppData\Local\...\select.pyd, PE32+ 9->48 dropped 50 C:\Users\user\AppData\Local\...\python313.dll, PE32+ 9->50 dropped 52 15 other files (none is malicious) 9->52 dropped 66 Contains functionality to infect the boot sector 9->66 68 Adds a directory exclusion to Windows Defender 9->68 70 Found pyInstaller with non standard icon 9->70 13 default.dat.exe 1 9->13         started        signatures5 process6 signatures7 72 Adds a directory exclusion to Windows Defender 13->72 16 cmd.exe 1 13->16         started        19 cmd.exe 1 13->19         started        21 cmd.exe 1 13->21         started        23 9 other processes 13->23 process8 signatures9 54 Adds a directory exclusion to Windows Defender 16->54 25 powershell.exe 23 16->25         started        28 conhost.exe 16->28         started        30 powershell.exe 23 19->30         started        32 conhost.exe 19->32         started        34 powershell.exe 23 21->34         started        36 conhost.exe 21->36         started        38 powershell.exe 23->38         started        40 powershell.exe 23->40         started        42 16 other processes 23->42 process10 signatures11 44 conhost.exe 28->44         started        64 Loading BitLocker PowerShell Module 30->64 process12
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/36e8a488df3ed19cc2f393271814f04569bd1f63fd32349ad13c533f6421e9ce
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/eeb1d2d5f588e18ced050255403a41c4
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/36e8a488df3ed19cc2f393271814f04569bd1f63fd32349ad13c533f6421e9ce/
Threat name:
Win64.Trojan.Yogi
Create hunting rule
Status:
Malicious
First seen:
2026-07-19 21:53:55 UTC
File Type:
PE+ (Exe)
Extracted files:
482
AV detection:
19 of 38 (50.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=g3ukjcg7h3izzqxtsmtrqfhqivu32h3d7uzdjgwrhrjt6zbb5hha._file
Result
Malware family:
n/a
Score:
  8/10
Tags:
execution pyarmor pyinstaller
Link:
https://tria.ge/reports/260719-1q9cesdt3m/
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:
36e8a488df3ed19cc2f393271814f04569bd1f63fd32349ad13c533f6421e9ce
MD5 hash:
eeb1d2d5f588e18ced050255403a41c4
SHA1 hash:
05d359cb2de06e7cbb1c336d33ce4f0e3071fdb6
Link:
https://www.unpac.me/results/356d8ac2-2e05-4384-80b3-3672ff7703fa/
SH256 hash:
36585912e5eaf83ba9fea0631534f690ccdc2d7ba91537166fe53e56c221e153
MD5 hash:
862f820c3251e4ca6fc0ac00e4092239
SHA1 hash:
ef96d84b253041b090c243594f90938e9a487a9a
Link:
https://www.unpac.me/results/356d8ac2-2e05-4384-80b3-3672ff7703fa/
SH256 hash:
9a0cad0b79f3fd6b00990449af1a6a052d8dcfc735ae4c56330918dfadaa6a2b
MD5 hash:
962499dc8989f560d5201099628ae62c
SHA1 hash:
b3d050aa17a957213e1f64c169662ae319c8dfb1
Link:
https://www.unpac.me/results/356d8ac2-2e05-4384-80b3-3672ff7703fa/
SH256 hash:
a5c6a329698490a035133433928d04368ce6285bb91a9d074fc285de4c9a32a4
MD5 hash:
16855ebef31c5b1ebe767f1c617645b3
SHA1 hash:
315521f3a748abfa35cd4d48e8dd09d0556d989b
Link:
https://www.unpac.me/results/356d8ac2-2e05-4384-80b3-3672ff7703fa/
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/36e8a488df3ed19cc2f393271814f04569bd1f63fd32349ad13c533f6421e9ce

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 36e8a488df3ed19cc2f393271814f04569bd1f63fd32349ad13c533f6421e9ce

(this sample)

  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/75222/

Comments