MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 747f8f2c557f5ca2ff3ac797ffe4df4b2e042a747e5d728060c49bda2466e5c0. 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 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 747f8f2c557f5ca2ff3ac797ffe4df4b2e042a747e5d728060c49bda2466e5c0
SHA3-384 hash: 8a4734f1243b36517db9ca1d5ffb1643f7588f3047a2f6fd3adc4b2ee38441546ea35d50d3c9d0e3f58dab7342052123
SHA1 hash: 657317c53092ec36f19c177f86bb7812350f45c5
MD5 hash: db622a86e81de720fc5d1b881ce55504
humanhash: london-bravo-orange-mango
File name:composer.php
Download: download sample
Signature Efimer
Create hunting rule
File size:14'028'698 bytes
First seen:2026-08-14 18:53:29 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash cf72283be50852e418ce6bbb6b645835 (101 x Efimer, 32 x Adware.Yogi, 8 x BlankGrabber)
ssdeep 393216:D0TlPOxuNMx/P3ZHh8DXMCHWUjCcuI3/PGTAI:DnuNMxp+DXMb8/H/O7
TLSH T1E2E6330CDBE006A6FDA3D0B9E9E229B392A97CA54775C5DB13D803537E132E04D3D626
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 38dcf8f8fcf8e040 (12 x Efimer)
Reporter aachum
Tags:ClickFix Efimer exe


Avatar
iamaachum
https://webenvysolutions.com/composer.php

Intelligence

File Origin
# of uploads :
1
# of downloads :
175
Origin country :
ES ES
Vendor Threat Intelligence
Malware configuration found for:
PyInstaller
Details
Link:
https://research.acce.ciphertechsolutions.com/results/ab9459f4-cb3a-4ee6-bf01-5e31fae708ba/
Malware family:
n/a
ID:
1
File name:
exe
Verdict:
No threats detected
Analysis date:
2026-08-14 18:59:17 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/de5b83b8-224e-41a6-a536-09989f56a6e5

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/81219/
Detection(s):
SecuriteInfo.com.Variant.Yogi.50160.97667237.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a file in the %temp% subdirectories
Restart of the analyzed sample
Creating a window
Verdict:
Unknown
Threat level:
  2.5/10
Confidence:
100%
Tags:
adaptive-context anti-debug expand installer-heuristic lolbin masquerade microsoft_visual_cc overlay packed packed packed pyinstaller reconnaissance
Link:
https://www.filescan.io/uploads/6a7f6466893817c9dd10fd9d/reports/9c7b8760-77a3-489f-b1c5-f207106119e2/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_60%
Link:
https://www.hybrid-analysis.com/sample/747f8f2c557f5ca2ff3ac797ffe4df4b2e042a747e5d728060c49bda2466e5c0
Verdict:
Malicious
File Type:
exe x64
First seen:
2026-08-14T17:19:00Z UTC
Last seen:
2026-08-14T23:58:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/747f8f2c557f5ca2ff3ac797ffe4df4b2e042a747e5d728060c49bda2466e5c0/results?tab=lookup
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/b90b1061-1165-4a42-81ec-c15c5d20b31b
Result
Threat name:
n/a
Detection:
malicious
Classification:
evad
Score:
56 / 100
Link:
https://www.joesandbox.com/analysis/1958394
Signature
Contains functionality to infect the boot sector
Found pyInstaller with non standard icon
Multi AV Scanner detection for submitted file
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1958394 Sample: composer.php.exe Startdate: 14/08/2026 Architecture: WINDOWS Score: 56 48 Multi AV Scanner detection for submitted file 2->48 8 composer.php.exe 31 2->8         started        process3 file4 40 C:\Users\user\AppData\...\unicodedata.pyd, PE32+ 8->40 dropped 42 C:\Users\user\AppData\Local\...\select.pyd, PE32+ 8->42 dropped 44 C:\Users\user\AppData\Local\...\python313.dll, PE32+ 8->44 dropped 46 15 other files (none is malicious) 8->46 dropped 50 Contains functionality to infect the boot sector 8->50 52 Found pyInstaller with non standard icon 8->52 12 composer.php.exe 2 8->12         started        signatures5 process6 process7 14 cmd.exe 1 12->14         started        16 cmd.exe 1 12->16         started        18 cmd.exe 1 12->18         started        20 2 other processes 12->20 process8 22 WMIC.exe 1 14->22         started        24 conhost.exe 14->24         started        26 WMIC.exe 1 16->26         started        28 conhost.exe 16->28         started        30 WMIC.exe 1 18->30         started        32 conhost.exe 18->32         started        34 WMIC.exe 1 20->34         started        36 WMIC.exe 1 20->36         started        38 2 other processes 20->38
Score:
98%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/747f8f2c557f5ca2ff3ac797ffe4df4b2e042a747e5d728060c49bda2466e5c0
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/db622a86e81de720fc5d1b881ce55504
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/747f8f2c557f5ca2ff3ac797ffe4df4b2e042a747e5d728060c49bda2466e5c0/
Threat name:
Win64.Trojan.Multiverze
Create hunting rule
Status:
Malicious
First seen:
2026-08-14 18:54:48 UTC
File Type:
PE+ (Exe)
Extracted files:
482
AV detection:
9 of 24 (37.50%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=or7y6lcvp5okf7z2y6l77zg7jmxaiktupzoxfadaysn5ujdg4xaa._file
Result
Malware family:
n/a
Score:
  7/10
Tags:
execution pyarmor pyinstaller
Link:
https://tria.ge/reports/260814-xkfalsbd58/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Executes a command shell one-liner
Loads dropped DLL
Unpacked files
SH256 hash:
747f8f2c557f5ca2ff3ac797ffe4df4b2e042a747e5d728060c49bda2466e5c0
MD5 hash:
db622a86e81de720fc5d1b881ce55504
SHA1 hash:
657317c53092ec36f19c177f86bb7812350f45c5
Link:
https://www.unpac.me/results/afe091af-a766-43f7-967c-a0b0a3487b3a/
SH256 hash:
36585912e5eaf83ba9fea0631534f690ccdc2d7ba91537166fe53e56c221e153
MD5 hash:
862f820c3251e4ca6fc0ac00e4092239
SHA1 hash:
ef96d84b253041b090c243594f90938e9a487a9a
Link:
https://www.unpac.me/results/afe091af-a766-43f7-967c-a0b0a3487b3a/
SH256 hash:
76c4b178021e73ae226e610bab7ebebdc5cf6899f7cd8bc4c35c14cbf9045304
MD5 hash:
8cbca6808c36f7d883117296dff9115d
SHA1 hash:
e4cb5aae79427f6a0522641670fb89410f6e7d62
Link:
https://www.unpac.me/results/afe091af-a766-43f7-967c-a0b0a3487b3a/
SH256 hash:
a5c6a329698490a035133433928d04368ce6285bb91a9d074fc285de4c9a32a4
MD5 hash:
16855ebef31c5b1ebe767f1c617645b3
SHA1 hash:
315521f3a748abfa35cd4d48e8dd09d0556d989b
Link:
https://www.unpac.me/results/afe091af-a766-43f7-967c-a0b0a3487b3a/
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/747f8f2c557f5ca2ff3ac797ffe4df4b2e042a747e5d728060c49bda2466e5c0

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 747f8f2c557f5ca2ff3ac797ffe4df4b2e042a747e5d728060c49bda2466e5c0

(this sample)

  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/81219/

Comments