MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 8e885a5a91a3657d47ca23d52659ea56b7010ffb24a4ae3eb184f8783b4223e3. 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: 8e885a5a91a3657d47ca23d52659ea56b7010ffb24a4ae3eb184f8783b4223e3
SHA3-384 hash: a1958d835164519adc83cfa802dad5d903602888a4788a732d4f4f769fbf3fe694d790a8a81dc93fdeefe77884d2da6f
SHA1 hash: a329bd2564e6d570581bfcfe10bd3e07d8b7ee84
MD5 hash: 25566accd0a1444b18b3178e38955c2a
humanhash: connecticut-red-gee-aspen
File name:default.dat
Download: download sample
Signature Efimer
Create hunting rule
File size:14'287'509 bytes
First seen:2026-07-26 11:52:42 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash dcaf48c1f10b0efa0a4472200f3850ed (616 x Efimer, 60 x BlankGrabber, 23 x SalatStealer)
ssdeep 393216:geQNbAgN3EuTazMA/MXMCHWUjXycuI3/PGTAI:gdAg5E06Z/MXMb8XPH/O7
TLSH T149E63358B9D003EEEAA3413DDEA25A90FA6070B25373C9DF4B5893B51E1B1E04E3D617
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 087860c0dcf8f102 (1 x Efimer)
Reporter aachum
Tags:ClickFix Efimer exe


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

Intelligence

File Origin
# of uploads :
1
# of downloads :
142
Origin country :
ES ES
Vendor Threat Intelligence
Malware configuration found for:
PyInstaller
Details
Link:
https://research.acce.ciphertechsolutions.com/results/db9b859c-29f1-471b-81ae-119efd28bf99/
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/76242/
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/6a65f52d45716bf377ecf2cf/reports/dc176530-c936-4c91-84e7-2c04de3433a3/overview
Verdict:
Malicious
Labled as:
Yogi.Generic
Link:
https://www.hybrid-analysis.com/sample/8e885a5a91a3657d47ca23d52659ea56b7010ffb24a4ae3eb184f8783b4223e3
Verdict:
Malicious
File Type:
exe x64
First seen:
2026-07-26T10:07:00Z UTC
Last seen:
2026-07-27T19:35:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/8e885a5a91a3657d47ca23d52659ea56b7010ffb24a4ae3eb184f8783b4223e3/results?tab=lookup
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/6384bce8-2350-489b-aed4-d9fd900a7668
Gathering data
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/8e885a5a91a3657d47ca23d52659ea56b7010ffb24a4ae3eb184f8783b4223e3
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/25566accd0a1444b18b3178e38955c2a
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/8e885a5a91a3657d47ca23d52659ea56b7010ffb24a4ae3eb184f8783b4223e3/
Threat name:
Win64.Trojan.Wacatac
Create hunting rule
Status:
Malicious
First seen:
2026-07-26 11:53:31 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=r2efuwurunsx2r6kepksmwpkk23qcd73essk4pvrqt4hqo2ceprq._file
Result
Malware family:
n/a
Score:
  8/10
Tags:
execution pyarmor pyinstaller
Link:
https://tria.ge/reports/260726-n2fs2atyfw/
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:
8e885a5a91a3657d47ca23d52659ea56b7010ffb24a4ae3eb184f8783b4223e3
MD5 hash:
25566accd0a1444b18b3178e38955c2a
SHA1 hash:
a329bd2564e6d570581bfcfe10bd3e07d8b7ee84
Link:
https://www.unpac.me/results/279b6085-a4fb-4304-ad4e-d935852dc06d/
SH256 hash:
36585912e5eaf83ba9fea0631534f690ccdc2d7ba91537166fe53e56c221e153
MD5 hash:
862f820c3251e4ca6fc0ac00e4092239
SHA1 hash:
ef96d84b253041b090c243594f90938e9a487a9a
Link:
https://www.unpac.me/results/279b6085-a4fb-4304-ad4e-d935852dc06d/
SH256 hash:
634816b087b3a9754d0a96abed9c2c6c8d0d4e1b6a7d168a1f85396ad8a1894b
MD5 hash:
2d135ab7bcf0c90e5ef7f58ef316c82f
SHA1 hash:
51e8de673e3a5328b8cfafa7d997f45e62369611
Link:
https://www.unpac.me/results/279b6085-a4fb-4304-ad4e-d935852dc06d/
SH256 hash:
a5c6a329698490a035133433928d04368ce6285bb91a9d074fc285de4c9a32a4
MD5 hash:
16855ebef31c5b1ebe767f1c617645b3
SHA1 hash:
315521f3a748abfa35cd4d48e8dd09d0556d989b
Link:
https://www.unpac.me/results/279b6085-a4fb-4304-ad4e-d935852dc06d/
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/8e885a5a91a3657d47ca23d52659ea56b7010ffb24a4ae3eb184f8783b4223e3

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 8e885a5a91a3657d47ca23d52659ea56b7010ffb24a4ae3eb184f8783b4223e3

(this sample)

  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/76242/
  
URLhaus
https://urlhaus.abuse.ch/url/3864471/

Comments