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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 bb796bb63f6985e75dbb6c1f8eb8640dee859f989f09a4a2fd9102d33918139b. 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: bb796bb63f6985e75dbb6c1f8eb8640dee859f989f09a4a2fd9102d33918139b
SHA3-384 hash: eb29432d5c190d3cb57dd7f1bffc35662487dfaa45906e1351d8e4b3943a2b8d6f82b79b1509c9d9593f78d88d3a63d9
SHA1 hash: 7ce0a02f6da71e83b09219a28166878d24a0015b
MD5 hash: e2eeb94c707d4872149c0e85ef6a5991
humanhash: comet-skylark-yankee-berlin
File name:composer.php
Download: download sample
Signature Efimer
Create hunting rule
File size:14'106'191 bytes
First seen:2026-08-17 07:52:31 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:oSLJ/PO0zs/gUNPrp3sYJjpAVgQC06XMCHWUjgcuI3/PGTAI:9LZP2/gUNp8pVgQC06XMb81H/O7
TLSH T1E3E63344A5D006AAEB639239DED1A1A0E47DF8E65732C6CB07B883616F532D0CD3D726
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 b271e8cccce8f0f2 (2 x Efimer)
Reporter aachum
Tags:ClickFix Efimer exe


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

Intelligence

File Origin
# of uploads :
1
# of downloads :
220
Origin country :
ES ES
Vendor Threat Intelligence
Malware configuration found for:
PyInstaller
Details
Link:
https://research.acce.ciphertechsolutions.com/results/cfc0d538-01d3-46fa-9715-b76e55e457d0/
Malware family:
n/a
ID:
1
File name:
exe
Verdict:
No threats detected
Analysis date:
2026-08-17 08:02:30 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/6e309c0f-cf99-4c23-8e1b-559133c78254

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/81556/
Detection(s):
SecuriteInfo.com.Variant.Yogi.50160.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/6a82bdcab0e6eca2531b2d95/reports/d643da86-97e1-40ff-8b1c-6a2bdaee8185/overview
Verdict:
Malicious
Labled as:
Yogi.Generic
Link:
https://www.hybrid-analysis.com/sample/bb796bb63f6985e75dbb6c1f8eb8640dee859f989f09a4a2fd9102d33918139b
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/9cad1a5b-df52-4af5-9cc3-55ac18eb7590
Result
Threat name:
n/a
Detection:
malicious
Classification:
evad
Score:
56 / 100
Link:
https://www.joesandbox.com/analysis/1958872
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: 1958872 Sample: composer.php.exe Startdate: 17/08/2026 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:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/bb796bb63f6985e75dbb6c1f8eb8640dee859f989f09a4a2fd9102d33918139b
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/e2eeb94c707d4872149c0e85ef6a5991
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/bb796bb63f6985e75dbb6c1f8eb8640dee859f989f09a4a2fd9102d33918139b/
Threat name:
Win64.Trojan.Multiverze
Create hunting rule
Status:
Suspicious
First seen:
2026-08-17 07:53:36 UTC
File Type:
PE+ (Exe)
Extracted files:
482
AV detection:
13 of 24 (54.17%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=xn4wxnr7ngc6oxn3nqpy5odebxxilh4yt4e2jix5sebngoiyconq._file
Result
Malware family:
n/a
Score:
  7/10
Tags:
execution pyarmor pyinstaller
Link:
https://tria.ge/reports/260817-jq71xsab95/
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:
bb796bb63f6985e75dbb6c1f8eb8640dee859f989f09a4a2fd9102d33918139b
MD5 hash:
e2eeb94c707d4872149c0e85ef6a5991
SHA1 hash:
7ce0a02f6da71e83b09219a28166878d24a0015b
Link:
https://www.unpac.me/results/c1a91ef0-1d62-4273-a439-478caefaea0e/
SH256 hash:
36585912e5eaf83ba9fea0631534f690ccdc2d7ba91537166fe53e56c221e153
MD5 hash:
862f820c3251e4ca6fc0ac00e4092239
SHA1 hash:
ef96d84b253041b090c243594f90938e9a487a9a
Link:
https://www.unpac.me/results/c1a91ef0-1d62-4273-a439-478caefaea0e/
SH256 hash:
a177b1e813ebde8a442a52d90cb31c860d809b259d50c9608ec1fc2c076bb343
MD5 hash:
1af763c23e2c37fe9cac629c3bc25292
SHA1 hash:
235e2829b666854a31b18bd54e6367cfe6ca5009
Link:
https://www.unpac.me/results/c1a91ef0-1d62-4273-a439-478caefaea0e/
SH256 hash:
a5c6a329698490a035133433928d04368ce6285bb91a9d074fc285de4c9a32a4
MD5 hash:
16855ebef31c5b1ebe767f1c617645b3
SHA1 hash:
315521f3a748abfa35cd4d48e8dd09d0556d989b
Link:
https://www.unpac.me/results/c1a91ef0-1d62-4273-a439-478caefaea0e/
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/bb796bb63f6985e75dbb6c1f8eb8640dee859f989f09a4a2fd9102d33918139b

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 bb796bb63f6985e75dbb6c1f8eb8640dee859f989f09a4a2fd9102d33918139b

(this sample)

  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/81556/

Comments