MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 81775ecf00ef60ef088c4d79d37ad60154dcc43bc8edce4ec56bb509331feaa8. 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: 10


Intelligence 10 IOCs YARA 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 81775ecf00ef60ef088c4d79d37ad60154dcc43bc8edce4ec56bb509331feaa8
SHA3-384 hash: 1fbbb267af559cf25936ffc0a882f944984a6d5fbdb9b089820d47c324ba113938f870a9b3b74c66685dd6c0b2e16749
SHA1 hash: 8bc62193a60f3d63e0e56d4564d08a12fae7036b
MD5 hash: c5d14331d0910a8d4d724b3c00329ced
humanhash: april-solar-spring-london
File name:default.dat
Download: download sample
Signature Efimer
Create hunting rule
File size:14'303'449 bytes
First seen:2026-07-24 03:52:08 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash dcaf48c1f10b0efa0a4472200f3850ed (521 x Efimer, 60 x BlankGrabber, 23 x SalatStealer)
ssdeep 393216:G8NJr56oT8Kich9T2LuXMCHWUjXwcuI3/PGTAI:G8D4i809aLuXMb8XlH/O7
TLSH T177E63318B5E026EEC973413DEFA26056E47C38A50770CDCB07A4D2E55D6B2E14E3EB62
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 40b960c0dcf9f104 (1 x Efimer)
Reporter aachum
Tags:ClickFix Efimer exe


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

Intelligence

File Origin
# of uploads :
1
# of downloads :
225
Origin country :
ES ES
Vendor Threat Intelligence
Malware configuration found for:
PyInstaller
Details
Link:
https://research.acce.ciphertechsolutions.com/results/b152167a-a422-432c-8d82-68ab4b1e72d7/
Malware family:
n/a
ID:
1
File name:
81775ecf00ef60ef088c4d79d37ad60154dcc43bc8edce4ec56bb509331feaa8.zip
Verdict:
Malicious activity
Analysis date:
2026-07-24 04:18:21 UTC
Tags:
arch-exec python pyinstaller stealer openssl tool
Link:
https://app.any.run/tasks/9e46e80c-8ca9-4650-a015-eb98f454757f

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/75880/
Detection(s):
SecuriteInfo.com.Variant.Dropper.354.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:
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/6a62e18259815f74d1449487/reports/295278ea-ef6e-4a1e-8a66-e4d57af4246a/overview
Verdict:
Malicious
Labled as:
Yogi.Generic
Link:
https://www.hybrid-analysis.com/sample/81775ecf00ef60ef088c4d79d37ad60154dcc43bc8edce4ec56bb509331feaa8
Verdict:
Malicious
File Type:
exe x64
First seen:
2026-07-24T01:34:00Z UTC
Last seen:
2026-07-26T02:10:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/81775ecf00ef60ef088c4d79d37ad60154dcc43bc8edce4ec56bb509331feaa8/results?tab=lookup
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/ab0a9b60-dcd4-4f37-a1ca-9b2adad73542
Gathering data
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/81775ecf00ef60ef088c4d79d37ad60154dcc43bc8edce4ec56bb509331feaa8
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/81775ecf00ef60ef088c4d79d37ad60154dcc43bc8edce4ec56bb509331feaa8/
Threat name:
Win64.Trojan.Sonbokli
Create hunting rule
Status:
Malicious
First seen:
2026-07-24 03:53:49 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=qf3v5tya55qo6cemjv45g6wwafknzrb3zdw44twfno2qsmy75kua._file
Result
Malware family:
n/a
Score:
  8/10
Tags:
execution pyarmor pyinstaller
Link:
https://tria.ge/reports/260724-efcpta1vaw/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Executes a command shell one-liner
Loads dropped DLL
Command and Scripting Interpreter: PowerShell
Unpacked files
SH256 hash:
81775ecf00ef60ef088c4d79d37ad60154dcc43bc8edce4ec56bb509331feaa8
MD5 hash:
c5d14331d0910a8d4d724b3c00329ced
SHA1 hash:
8bc62193a60f3d63e0e56d4564d08a12fae7036b
Link:
https://www.unpac.me/results/de7ca5e0-1505-4860-8169-f4d5ecebfc35/
SH256 hash:
36585912e5eaf83ba9fea0631534f690ccdc2d7ba91537166fe53e56c221e153
MD5 hash:
862f820c3251e4ca6fc0ac00e4092239
SHA1 hash:
ef96d84b253041b090c243594f90938e9a487a9a
Link:
https://www.unpac.me/results/de7ca5e0-1505-4860-8169-f4d5ecebfc35/
SH256 hash:
a4d39cd2d72959e77f4ccdd83e47944bdb763ed8dd6c3e90f5da3a12dac52845
MD5 hash:
8e6487f93d3cb4411fa5770184011759
SHA1 hash:
8f3521b9adb5e2563d1b39cd326ac22dc509fc40
Link:
https://www.unpac.me/results/de7ca5e0-1505-4860-8169-f4d5ecebfc35/
SH256 hash:
a5c6a329698490a035133433928d04368ce6285bb91a9d074fc285de4c9a32a4
MD5 hash:
16855ebef31c5b1ebe767f1c617645b3
SHA1 hash:
315521f3a748abfa35cd4d48e8dd09d0556d989b
Link:
https://www.unpac.me/results/de7ca5e0-1505-4860-8169-f4d5ecebfc35/
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/81775ecf00ef60ef088c4d79d37ad60154dcc43bc8edce4ec56bb509331feaa8

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 81775ecf00ef60ef088c4d79d37ad60154dcc43bc8edce4ec56bb509331feaa8

(this sample)

  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/75880/

Comments