MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 27e86594b78358d7c9f7440d4d7f7f5e63e7dd43cd6bd5e55f2f6072754ca02c. 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 8 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 27e86594b78358d7c9f7440d4d7f7f5e63e7dd43cd6bd5e55f2f6072754ca02c
SHA3-384 hash: 68c99df23033fea33cb4c0fa242efc88fe9bc371c5c074387708c4572e09c8a596907c42b21c8de4d4b923334d52d92f
SHA1 hash: bf03dd36e9419eb8630dcba608febe5d24ffeadd
MD5 hash: c8882a903137e17caae8a542aa460e64
humanhash: maryland-indigo-mirror-sweet
File name:default.dat
Download: download sample
Signature Efimer
Create hunting rule
File size:14'300'654 bytes
First seen:2026-07-14 04:52:09 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash dcaf48c1f10b0efa0a4472200f3850ed (254 x Efimer, 60 x BlankGrabber, 22 x NetSupport)
ssdeep 196608:8gvVptX+wips+S7x2vIpXwGmRAfXMCHGLLc54i1wN+MCpPIcu9KYK39sI3PPGTMj:8gdp1+MDQIXbXMCHWUjXGcuI3/PGTAI
TLSH T189E633286AD813FEEAB26278FED0A582D0A974B14733C5DF0B7C96726D530E05C39653
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 71f8d0f0f0e0f070 (1 x Efimer)
Reporter aachum
Tags:ClickFix Efimer exe


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

Intelligence

File Origin
# of uploads :
1
# of downloads :
151
Origin country :
ES ES
Vendor Threat Intelligence
Malware configuration found for:
PyInstaller
Details
Link:
https://research.acce.ciphertechsolutions.com/results/5e21a770-3106-4b38-a282-6ee48c581f96/
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/74536/
Detection(s):
SecuriteInfo.com.Variant.Dropper.354.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
92.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6a55c0943d3a766c4391c482
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/6a55c08f4e4df0cfcb0acf9d/reports/1f28d997-1697-474f-9143-978b173c3ceb/overview
Verdict:
Malicious
Labled as:
Yogi.Generic
Link:
https://www.hybrid-analysis.com/sample/27e86594b78358d7c9f7440d4d7f7f5e63e7dd43cd6bd5e55f2f6072754ca02c
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/bdb0b569-d859-4e2a-9a0c-a844bc5c1f90
Result
Threat name:
n/a
Detection:
malicious
Classification:
evad
Score:
72 / 100
Link:
https://www.joesandbox.com/analysis/1941939
Signature
Adds a directory exclusion to Windows Defender
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: 1941939 Sample: default.dat.exe Startdate: 14/07/2026 Architecture: WINDOWS Score: 72 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 8 default.dat.exe 31 2->8         started        12 svchost.exe 1 1 2->12         started        process3 dnsIp4 46 C:\Users\user\AppData\...\unicodedata.pyd, PE32+ 8->46 dropped 48 C:\Users\user\AppData\Local\...\select.pyd, PE32+ 8->48 dropped 50 C:\Users\user\AppData\Local\...\python313.dll, PE32+ 8->50 dropped 52 15 other files (none is malicious) 8->52 dropped 66 Adds a directory exclusion to Windows Defender 8->66 68 Found pyInstaller with non standard icon 8->68 15 default.dat.exe 1 8->15         started        54 127.0.0.1 unknown unknown 12->54 file5 signatures6 process7 signatures8 72 Adds a directory exclusion to Windows Defender 15->72 18 cmd.exe 1 15->18         started        21 cmd.exe 1 15->21         started        23 cmd.exe 1 15->23         started        25 9 other processes 15->25 process9 signatures10 64 Adds a directory exclusion to Windows Defender 18->64 27 powershell.exe 23 18->27         started        30 conhost.exe 18->30         started        32 powershell.exe 22 21->32         started        34 conhost.exe 21->34         started        36 powershell.exe 23 23->36         started        38 conhost.exe 23->38         started        40 powershell.exe 25->40         started        42 powershell.exe 25->42         started        44 16 other processes 25->44 process11 signatures12 70 Loading BitLocker PowerShell Module 27->70
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/27e86594b78358d7c9f7440d4d7f7f5e63e7dd43cd6bd5e55f2f6072754ca02c
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/c8882a903137e17caae8a542aa460e64
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/27e86594b78358d7c9f7440d4d7f7f5e63e7dd43cd6bd5e55f2f6072754ca02c/
Gathering data
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=e7uglffxqnmnpspxiqgu2737lzr6pxkdzvv5lzk7f5qhe5kmuawa._file
Result
Malware family:
n/a
Score:
  8/10
Tags:
execution pyarmor pyinstaller
Link:
https://tria.ge/reports/260714-fhmhgaew2m/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Loads dropped DLL
Command and Scripting Interpreter: PowerShell
Unpacked files
SH256 hash:
27e86594b78358d7c9f7440d4d7f7f5e63e7dd43cd6bd5e55f2f6072754ca02c
MD5 hash:
c8882a903137e17caae8a542aa460e64
SHA1 hash:
bf03dd36e9419eb8630dcba608febe5d24ffeadd
Link:
https://www.unpac.me/results/15f9b7e4-ad97-414f-9cad-b3e8ca8fa3ef/
SH256 hash:
04d22e05579b29291533f62ad30e86a64cca5a94a87727b6aa19c8804484c80f
MD5 hash:
f37451d84dc161272105696602a1b996
SHA1 hash:
57eee2b9df412a063e69dcca687c13c9305870fa
Link:
https://www.unpac.me/results/15f9b7e4-ad97-414f-9cad-b3e8ca8fa3ef/
SH256 hash:
36585912e5eaf83ba9fea0631534f690ccdc2d7ba91537166fe53e56c221e153
MD5 hash:
862f820c3251e4ca6fc0ac00e4092239
SHA1 hash:
ef96d84b253041b090c243594f90938e9a487a9a
Link:
https://www.unpac.me/results/15f9b7e4-ad97-414f-9cad-b3e8ca8fa3ef/
SH256 hash:
a5c6a329698490a035133433928d04368ce6285bb91a9d074fc285de4c9a32a4
MD5 hash:
16855ebef31c5b1ebe767f1c617645b3
SHA1 hash:
315521f3a748abfa35cd4d48e8dd09d0556d989b
Link:
https://www.unpac.me/results/15f9b7e4-ad97-414f-9cad-b3e8ca8fa3ef/
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/27e86594b78358d7c9f7440d4d7f7f5e63e7dd43cd6bd5e55f2f6072754ca02c

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:telebot_framework
Create hunting rule
Author:vietdx.mb
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 27e86594b78358d7c9f7440d4d7f7f5e63e7dd43cd6bd5e55f2f6072754ca02c

(this sample)

  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/74536/
  
URLhaus
https://urlhaus.abuse.ch/url/3864471/

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