MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 d806f57cd4a2e2450a80a14e72aa17c1eabcc5d3b50f14eb48d88e29aeb0a913. 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: d806f57cd4a2e2450a80a14e72aa17c1eabcc5d3b50f14eb48d88e29aeb0a913
SHA3-384 hash: c6611fa1c6d10bee35067571167695c9d125f8355696826fc362bb6eb361469939cf826e8ed99a42a33fa28f9681035e
SHA1 hash: dc63458e505cc25d05c28e48717bd1003748f367
MD5 hash: 36a3a761c0929118117bb0f78c1ab5e1
humanhash: massachusetts-johnny-angel-moon
File name:composer.php
Download: download sample
Signature Efimer
Create hunting rule
File size:14'063'522 bytes
First seen:2026-08-14 11:53:33 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash cf72283be50852e418ce6bbb6b645835 (59 x Efimer, 32 x Adware.Yogi, 8 x BlankGrabber)
ssdeep 393216:CDKjoXQIDniRB7ipXMCHWUjJccuI3/PGTAI:ClQhepXMb8JJH/O7
TLSH T133E6334457C102EDFDB3413CEAD2429A9978B4721375C0CBA7F417A6BE572C09B3E62A
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 f0f0f0e8e8f0f0f0 (7 x Efimer)
Reporter aachum
Tags:ClickFix Efimer exe


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

Intelligence

File Origin
# of uploads :
1
# of downloads :
188
Origin country :
ES ES
Vendor Threat Intelligence
Malware configuration found for:
PyInstaller
Details
Link:
https://research.acce.ciphertechsolutions.com/results/fcb56f54-7fd7-4758-b498-c334f93cd4a6/
Malware family:
n/a
ID:
1
File name:
exe
Verdict:
No threats detected
Analysis date:
2026-08-14 12:01:10 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/548c3deb-4edf-4a85-bda5-cb4fa12b0ee9

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/81111/
Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a file in the %temp% subdirectories
Restart of the analyzed sample
Creating a window
Launching a service
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/6a7f01ef7432a557c85c3e2c/reports/fe0dec93-6143-4325-b7cd-e42472b999f5/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_60%
Link:
https://www.hybrid-analysis.com/sample/d806f57cd4a2e2450a80a14e72aa17c1eabcc5d3b50f14eb48d88e29aeb0a913
Verdict:
Malicious
File Type:
exe x64
First seen:
2026-08-14T10:04:00Z UTC
Last seen:
2026-08-14T13:35:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/d806f57cd4a2e2450a80a14e72aa17c1eabcc5d3b50f14eb48d88e29aeb0a913/results?tab=lookup
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/31b128fc-7b1e-41ad-ac53-f8af01b77232
Result
Threat name:
n/a
Detection:
malicious
Classification:
evad
Score:
56 / 100
Link:
https://www.joesandbox.com/analysis/1958160
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: 1958160 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/d806f57cd4a2e2450a80a14e72aa17c1eabcc5d3b50f14eb48d88e29aeb0a913
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/36a3a761c0929118117bb0f78c1ab5e1
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/d806f57cd4a2e2450a80a14e72aa17c1eabcc5d3b50f14eb48d88e29aeb0a913/
Threat name:
Win64.Trojan.Yogi
Create hunting rule
Status:
Malicious
First seen:
2026-08-14 11:54:28 UTC
File Type:
PE+ (Exe)
Extracted files:
482
AV detection:
14 of 38 (36.84%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=3adpk7guulrekcuaufhhfkqxyhvlzrotwuhrj22i3chctlvqvejq._file
Result
Malware family:
n/a
Score:
  7/10
Tags:
execution pyarmor pyinstaller
Link:
https://tria.ge/reports/260814-n23b2ahd67/
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:
d806f57cd4a2e2450a80a14e72aa17c1eabcc5d3b50f14eb48d88e29aeb0a913
MD5 hash:
36a3a761c0929118117bb0f78c1ab5e1
SHA1 hash:
dc63458e505cc25d05c28e48717bd1003748f367
Link:
https://www.unpac.me/results/959d3b57-a3c3-4c96-b98c-646106e59e90/
SH256 hash:
283f25e1422585fdb09e03b23b3d79497883e1c65880a6dd72f0fc38cc442e5f
MD5 hash:
7fb9a753370e60b7d7f253ff5799f000
SHA1 hash:
330c8c03a6bf17736aa30db50862136c9f9e06a1
Link:
https://www.unpac.me/results/959d3b57-a3c3-4c96-b98c-646106e59e90/
SH256 hash:
36585912e5eaf83ba9fea0631534f690ccdc2d7ba91537166fe53e56c221e153
MD5 hash:
862f820c3251e4ca6fc0ac00e4092239
SHA1 hash:
ef96d84b253041b090c243594f90938e9a487a9a
Link:
https://www.unpac.me/results/959d3b57-a3c3-4c96-b98c-646106e59e90/
SH256 hash:
a5c6a329698490a035133433928d04368ce6285bb91a9d074fc285de4c9a32a4
MD5 hash:
16855ebef31c5b1ebe767f1c617645b3
SHA1 hash:
315521f3a748abfa35cd4d48e8dd09d0556d989b
Link:
https://www.unpac.me/results/959d3b57-a3c3-4c96-b98c-646106e59e90/
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/d806f57cd4a2e2450a80a14e72aa17c1eabcc5d3b50f14eb48d88e29aeb0a913

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 d806f57cd4a2e2450a80a14e72aa17c1eabcc5d3b50f14eb48d88e29aeb0a913

(this sample)

  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/81111/

Comments