MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 5da44e36790d8bb2ab51d7b70bbc25063d8236b959a3452cbb4bc41b5bcd4966. 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: 5da44e36790d8bb2ab51d7b70bbc25063d8236b959a3452cbb4bc41b5bcd4966
SHA3-384 hash: 31e904f1bd3c596e3d9055a3980426e68151cb49bffa93417f385fb186ecc4f9f31e372d27a1eaf39d395331590bf699
SHA1 hash: 265109b8a26b6602bc5bcbb300fc7d38e7d07936
MD5 hash: e8c3c8d8b522b6c0879c364ccfbf38b0
humanhash: social-autumn-oklahoma-music
File name:default.dat
Download: download sample
Signature Efimer
Create hunting rule
File size:14'299'267 bytes
First seen:2026-07-17 01:52:09 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash dcaf48c1f10b0efa0a4472200f3850ed (380 x Efimer, 60 x BlankGrabber, 22 x SalatStealer)
ssdeep 393216:dTqwYdIi8pp4cBKeB7+Sa5JnoXMCHWUjX1cuI3/PGTAI:dOkTpejeB7+S+mXMb8XCH/O7
TLSH T1BCE63358BBD002EED8A3403CDBE191DEA69974771B31C59F57AC43A65E832E08E3C617
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 70f0f0e8e8e0f0f0 (2 x Efimer)
Reporter aachum
Tags:ClickFix Efimer exe


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

Intelligence

File Origin
# of uploads :
1
# of downloads :
198
Origin country :
ES ES
Vendor Threat Intelligence
Malware configuration found for:
PyInstaller
Details
Link:
https://research.acce.ciphertechsolutions.com/results/011d06c8-ba9c-4b92-b803-b409a3bce220/
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/74947/
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=6a598ae956bd89099b5579e0
Tags:
installer shell sage
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/6a598ae1e700ed39dddd5160/reports/729d5ade-9e20-4305-b655-d5f77f87b604/overview
Verdict:
Malicious
Labled as:
Yogi.Generic
Link:
https://www.hybrid-analysis.com/sample/5da44e36790d8bb2ab51d7b70bbc25063d8236b959a3452cbb4bc41b5bcd4966
Verdict:
Malicious
File Type:
exe x64
First seen:
2026-07-16T23:21:00Z UTC
Last seen:
2026-07-18T19:10:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/5da44e36790d8bb2ab51d7b70bbc25063d8236b959a3452cbb4bc41b5bcd4966/results?tab=lookup
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/54fb9828-866e-46d2-8c80-fcc6e462a900
Result
Threat name:
n/a
Detection:
malicious
Classification:
evad
Score:
76 / 100
Link:
https://www.joesandbox.com/analysis/1943967
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: 1943967 Sample: default.dat.exe Startdate: 17/07/2026 Architecture: WINDOWS Score: 76 51 Multi AV Scanner detection for submitted file 2->51 53 Joe Sandbox ML detected suspicious sample 2->53 55 Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet 2->55 57 Sigma detected: Suspicious Script Execution From Temp Folder 2->57 8 default.dat.exe 31 2->8         started        process3 file4 43 C:\Users\user\AppData\...\unicodedata.pyd, PE32+ 8->43 dropped 45 C:\Users\user\AppData\Local\...\select.pyd, PE32+ 8->45 dropped 47 C:\Users\user\AppData\Local\...\python313.dll, PE32+ 8->47 dropped 49 15 other files (none is malicious) 8->49 dropped 61 Contains functionality to infect the boot sector 8->61 63 Adds a directory exclusion to Windows Defender 8->63 65 Found pyInstaller with non standard icon 8->65 12 default.dat.exe 1 8->12         started        signatures5 process6 signatures7 67 Adds a directory exclusion to Windows Defender 12->67 15 cmd.exe 1 12->15         started        18 cmd.exe 1 12->18         started        20 cmd.exe 1 12->20         started        22 9 other processes 12->22 process8 signatures9 69 Adds a directory exclusion to Windows Defender 15->69 24 powershell.exe 23 15->24         started        27 conhost.exe 15->27         started        29 powershell.exe 20 18->29         started        31 conhost.exe 18->31         started        33 powershell.exe 23 20->33         started        35 conhost.exe 20->35         started        37 powershell.exe 22->37         started        39 powershell.exe 22->39         started        41 16 other processes 22->41 process10 signatures11 59 Loading BitLocker PowerShell Module 24->59
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/5da44e36790d8bb2ab51d7b70bbc25063d8236b959a3452cbb4bc41b5bcd4966
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/e8c3c8d8b522b6c0879c364ccfbf38b0
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/5da44e36790d8bb2ab51d7b70bbc25063d8236b959a3452cbb4bc41b5bcd4966/
Threat name:
Win64.Trojan.Sonbokli
Create hunting rule
Status:
Malicious
First seen:
2026-07-17 01:53:40 UTC
File Type:
PE+ (Exe)
Extracted files:
482
AV detection:
10 of 24 (41.67%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=lwse4ntzbwf3fk2r263qxpbfay6yenvzlgruklf3jpcbww6njfta._file
Result
Malware family:
n/a
Score:
  8/10
Tags:
execution pyarmor pyinstaller
Link:
https://tria.ge/reports/260717-capfbahv9q/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Loads dropped DLL
Command and Scripting Interpreter: PowerShell
Unpacked files
SH256 hash:
5da44e36790d8bb2ab51d7b70bbc25063d8236b959a3452cbb4bc41b5bcd4966
MD5 hash:
e8c3c8d8b522b6c0879c364ccfbf38b0
SHA1 hash:
265109b8a26b6602bc5bcbb300fc7d38e7d07936
Link:
https://www.unpac.me/results/d1eb6a2f-eb61-49d6-93e5-4df8f5c645a3/
SH256 hash:
2822d2e5be8904e19fcbfc675bbf461e68ee846d39d212701028f6afbb1ba9db
MD5 hash:
904437400b52e9baddcd266d7762a3c9
SHA1 hash:
441c4cadee31c926e5b4d2c3a4a24ffdaf79c614
Link:
https://www.unpac.me/results/d1eb6a2f-eb61-49d6-93e5-4df8f5c645a3/
SH256 hash:
36585912e5eaf83ba9fea0631534f690ccdc2d7ba91537166fe53e56c221e153
MD5 hash:
862f820c3251e4ca6fc0ac00e4092239
SHA1 hash:
ef96d84b253041b090c243594f90938e9a487a9a
Link:
https://www.unpac.me/results/d1eb6a2f-eb61-49d6-93e5-4df8f5c645a3/
SH256 hash:
a5c6a329698490a035133433928d04368ce6285bb91a9d074fc285de4c9a32a4
MD5 hash:
16855ebef31c5b1ebe767f1c617645b3
SHA1 hash:
315521f3a748abfa35cd4d48e8dd09d0556d989b
Link:
https://www.unpac.me/results/d1eb6a2f-eb61-49d6-93e5-4df8f5c645a3/
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/5da44e36790d8bb2ab51d7b70bbc25063d8236b959a3452cbb4bc41b5bcd4966

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 5da44e36790d8bb2ab51d7b70bbc25063d8236b959a3452cbb4bc41b5bcd4966

(this sample)

  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/74947/

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