MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4b5d2e8ff830fa99497eb0357901964fcd7ab67fec1439df2a17080e1b658b5d. 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: 12


Intelligence 12 IOCs YARA 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4b5d2e8ff830fa99497eb0357901964fcd7ab67fec1439df2a17080e1b658b5d
SHA3-384 hash: 842f1f8b40d2634fd2baec5fd351fa9aa82bd31cd3634bea967f1e6ad50dac98ab2d89885a73a0c60b074ee4a7fa828b
SHA1 hash: c15e3b10a02dcf6d387654e96c611fda93ed29d9
MD5 hash: 31d59798b9ffd315d6b1424743087506
humanhash: burger-beer-hydrogen-moon
File name:common.dat
Download: download sample
Signature Efimer
Create hunting rule
File size:13'850'300 bytes
First seen:2026-05-25 20:58:11 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash c5e49de42b1165b00bd79240b8cd617d (129 x Efimer)
ssdeep 393216:BkhAlkwtzNsX3yRsXMCHWUjX4cuI3/PGTAI:BkhAeMziXiKXMb8XNH/O7
TLSH T125D6331C88D331EED2A7D0BC5FD11BB0E869B97952309D7F4AA0C3B5AD5B930092C56B
TrID 45.6% (.EXE) Microsoft Visual C++ compiled executable (generic) (16529/12/5)
18.0% (.EXE) Win64 Executable (generic) (6522/11/2)
13.9% (.EXE) Win16 NE executable (generic) (5038/12/1)
5.6% (.ICL) Windows Icons Library (generic) (2059/9)
5.6% (.EXE) OS/2 Executable (generic) (2029/13)
Magika pebin
dhash icon 7471f0e8e8e0f030 (1 x Efimer)
Reporter aachum
Tags:ClickFix Efimer exe


Avatar
iamaachum
https://dynga.pl/common.dat

Intelligence

File Origin
# of uploads :
1
# of downloads :
113
Origin country :
ES ES
Vendor Threat Intelligence
Malware configuration found for:
PyInstaller
Details
PyInstaller
a compiled assembly and a Python version
Link:
https://research.acce.ciphertechsolutions.com/results/fec5f3e3-0c39-4e4e-a458-c39684fcd636/
Malware family:
n/a
ID:
1
File name:
common.dat
Verdict:
Malicious activity
Analysis date:
2026-05-21 07:15:54 UTC
Tags:
python pyinstaller stealer openssl tool
Link:
https://app.any.run/tasks/a870bc7c-2e85-4111-a541-992da41faa70

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/67882/
Detection(s):
SecuriteInfo.com.Variant.Tedy.902200.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
91.7%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6a0eb1204159ce11f6023b97
Tags:
installer shell sage
Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a file in the %temp% subdirectories
Restart of the analyzed sample
Creating a window
Sending a custom TCP request
Verdict:
Malicious
Labled as:
Ser.Tedy.Generic
Link:
https://www.hybrid-analysis.com/sample/4b5d2e8ff830fa99497eb0357901964fcd7ab67fec1439df2a17080e1b658b5d
Verdict:
Malicious
File Type:
exe x64
First seen:
2026-05-21T04:20:00Z UTC
Last seen:
2026-05-27T05:42:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/4b5d2e8ff830fa99497eb0357901964fcd7ab67fec1439df2a17080e1b658b5d/results?tab=lookup
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/0ebdf579-de55-44f4-9d18-bb21ce801bc8
Result
Threat name:
n/a
Detection:
malicious
Classification:
evad
Score:
76 / 100
Link:
https://www.joesandbox.com/analysis/1918283
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: 1918283 Sample: common.dat.exe Startdate: 25/05/2026 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 common.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 common.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 3 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 23 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 4 other processes 22->41 process10 signatures11 59 Loading BitLocker PowerShell Module 24->59
Score:
93%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/4b5d2e8ff830fa99497eb0357901964fcd7ab67fec1439df2a17080e1b658b5d
Verdict:
inconclusive
YARA:
5 match(es)
Tags:
Executable PE (Portable Executable) PE File Layout Win 64 Exe x64
Link:
https://app.malva.re/file/31d59798b9ffd315d6b1424743087506
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4b5d2e8ff830fa99497eb0357901964fcd7ab67fec1439df2a17080e1b658b5d/
Verdict:
Malicious
Threat:
Trojan.Python.Agent
Link:
https://tip.neiki.dev/file/4b5d2e8ff830fa99497eb0357901964fcd7ab67fec1439df2a17080e1b658b5d
Threat name:
Win64.Dropper.Generic
Create hunting rule
Status:
Suspicious
First seen:
2026-05-21 07:15:44 UTC
File Type:
PE+ (Exe)
Extracted files:
482
AV detection:
22 of 36 (61.11%)
Threat level:
  3/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=jnos5d7ygd5jssl6wa2xsamwj7gxvnt75qkdtxzkc4ea4g3frnoq._file
Result
Malware family:
n/a
Score:
  8/10
Tags:
execution pyarmor pyinstaller
Link:
https://tria.ge/reports/260525-zsckssfz4m/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Loads dropped DLL
Command and Scripting Interpreter: PowerShell
Unpacked files
SH256 hash:
4b5d2e8ff830fa99497eb0357901964fcd7ab67fec1439df2a17080e1b658b5d
MD5 hash:
31d59798b9ffd315d6b1424743087506
SHA1 hash:
c15e3b10a02dcf6d387654e96c611fda93ed29d9
Link:
https://www.unpac.me/results/5673d71e-9447-484a-9253-11d3500e3a6e/
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/4b5d2e8ff830fa99497eb0357901964fcd7ab67fec1439df2a17080e1b658b5d

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: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:pe_detect_tls_callbacks
Create hunting rule
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.

Cape
Cape
https://www.capesandbox.com/analysis/67882/

Comments