MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 863cce022db6778dcea360cf8a268103bcddbd0057e936cc5a2d060b2796022a. 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: 863cce022db6778dcea360cf8a268103bcddbd0057e936cc5a2d060b2796022a
SHA3-384 hash: 5fe3f6745cd6e1c033212c39ada8fcbf185f26cf6f0b53b333d1349f6ff90aa32bea7b0012740043526836a914a98bc3
SHA1 hash: 876b86a1480c6d2bcc58d97215af3d38a2564bfb
MD5 hash: 022de1fd649f7d495f8bdd08acdc7048
humanhash: blossom-vermont-neptune-twenty
File name:default.dat
Download: download sample
Signature Efimer
Create hunting rule
File size:14'309'316 bytes
First seen:2026-07-14 13:52:20 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 393216:GJ5H/iBVx0AepbUNEu2+i4pwXMCHWUjXccuI3/PGTAI:GuVx0tUu+iUwXMb8XJH/O7
TLSH T1C0E633185FE412EDE2A3403CE9E255D5E69C78B64772C6EF07E0C2612E5B1F18D3D22A
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 70f0f0e8e8e0f030 (4 x Efimer)
Reporter aachum
Tags:ClickFix Efimer exe


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

Intelligence

File Origin
# of uploads :
1
# of downloads :
141
Origin country :
ES ES
Vendor Threat Intelligence
Malware configuration found for:
PyInstaller
Details
Link:
https://research.acce.ciphertechsolutions.com/results/5d13f9f7-00fa-4050-8f2d-06d251aa9bf8/
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/74626/
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=6a563f28b3055706bb553ce5
Tags:
installer shell sage
Result
Verdict:
Clean
Maliciousness:

Behaviour
Restart of the analyzed sample
Creating a window
Creating a file in the %temp% subdirectories
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/6a563f215212ca43d7fed398/reports/864773d9-7a0e-4e92-8341-679d4454cb68/overview
Verdict:
Malicious
Labled as:
Yogi.Generic
Link:
https://www.hybrid-analysis.com/sample/863cce022db6778dcea360cf8a268103bcddbd0057e936cc5a2d060b2796022a
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/d5ead5f2-ce2f-4a3d-91d7-d1aca21045d7
Result
Threat name:
n/a
Detection:
malicious
Classification:
evad
Score:
72 / 100
Link:
https://www.joesandbox.com/analysis/1942249
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: 1942249 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 23 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 36->70
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/863cce022db6778dcea360cf8a268103bcddbd0057e936cc5a2d060b2796022a
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/022de1fd649f7d495f8bdd08acdc7048
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/863cce022db6778dcea360cf8a268103bcddbd0057e936cc5a2d060b2796022a/
Gathering data
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=qy6m4arnwz3y3tvdmdhyujubao6n3piak7utntc2fudawj4waiva._file
Result
Malware family:
n/a
Score:
  8/10
Tags:
execution pyarmor pyinstaller
Link:
https://tria.ge/reports/260714-q6nqjsd18n/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Loads dropped DLL
Command and Scripting Interpreter: PowerShell
Unpacked files
SH256 hash:
863cce022db6778dcea360cf8a268103bcddbd0057e936cc5a2d060b2796022a
MD5 hash:
022de1fd649f7d495f8bdd08acdc7048
SHA1 hash:
876b86a1480c6d2bcc58d97215af3d38a2564bfb
Link:
https://www.unpac.me/results/5311dc28-4a78-4765-9571-fdfcca28ec5c/
SH256 hash:
36585912e5eaf83ba9fea0631534f690ccdc2d7ba91537166fe53e56c221e153
MD5 hash:
862f820c3251e4ca6fc0ac00e4092239
SHA1 hash:
ef96d84b253041b090c243594f90938e9a487a9a
Link:
https://www.unpac.me/results/5311dc28-4a78-4765-9571-fdfcca28ec5c/
SH256 hash:
9837984ab54ba1f92b3f9997ab4f7e882689780c86ddd42619d4b561131705c9
MD5 hash:
3cb308ab666eb25d9eaea153ab1c6140
SHA1 hash:
a9ac5521ba8b4e5bd87dfc7b7e19935f9c9efdbb
Link:
https://www.unpac.me/results/5311dc28-4a78-4765-9571-fdfcca28ec5c/
SH256 hash:
a5c6a329698490a035133433928d04368ce6285bb91a9d074fc285de4c9a32a4
MD5 hash:
16855ebef31c5b1ebe767f1c617645b3
SHA1 hash:
315521f3a748abfa35cd4d48e8dd09d0556d989b
Link:
https://www.unpac.me/results/5311dc28-4a78-4765-9571-fdfcca28ec5c/
Please note that we are no longer able to provide a coverage score for Virus Total.

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 863cce022db6778dcea360cf8a268103bcddbd0057e936cc5a2d060b2796022a

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/3864471/
Cape
Cape
https://www.capesandbox.com/analysis/74626/

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