MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 55cd158c88d5e7cd6aadafc8eaf64ab4a1a633691f52951f8b82e2fb5226bbdb. 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: 7
| SHA256 hash: | 55cd158c88d5e7cd6aadafc8eaf64ab4a1a633691f52951f8b82e2fb5226bbdb |
|---|---|
| SHA3-384 hash: | 6d110763f5f0608f3c5cc465c263c78529c6ee5407761ba7cc943f39494d1e09979f793ec6170b15fd4b50df88286321 |
| SHA1 hash: | 2fd434edd4bea9ad91801c4f50550125d8eb12fa |
| MD5 hash: | 5602ba9f14aa3c99845b518314c4f2d5 |
| humanhash: | lamp-fanta-nevada-alpha |
| File name: | default.dat |
| Download: | download sample |
| Signature | Efimer |
| File size: | 14'278'546 bytes |
| First seen: | 2026-07-26 08:52:31 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | dcaf48c1f10b0efa0a4472200f3850ed (521 x Efimer, 60 x BlankGrabber, 23 x SalatStealer) |
| ssdeep | 393216:x90oDlP8xPieJxpLh4+I2RXMCHWUjX9cuI3/PGTAI:xxDR1QLK2RXMb8XKH/O7 |
| TLSH | T18CE6338D5BE001FDE533803DEEA22686D4A634B90779C8CF476887646D276E20D3E75B |
| 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 | 5471d4d8c8e4f030 (7 x Efimer) |
| Reporter |  aachum |
| Tags: | ClickFix Efimer exe |
Intelligence
File Origin
# of uploads :
1
# of downloads :
159
Origin country :
ESVendor Threat Intelligence
Malware configuration found for:
PyInstaller
Details
Detection:
n/a
Detection(s):
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
Verdict:
Malicious
Labled as:
Yogi.Generic
Verdict:
Unknown
Gathering data
Score:
99%
Verdict:
Malware
File Type:
PE
Verdict:
inconclusive
YARA:
5 match(es)
Tags:
Executable PDB Path PE (Portable Executable) PE File Layout Win 64 Exe x64
Gathering data
Detection(s):
Suspicious file
Result
Malware family:
n/a
Score:
8/10
Tags:
execution pyarmor pyinstaller
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:
55cd158c88d5e7cd6aadafc8eaf64ab4a1a633691f52951f8b82e2fb5226bbdb
MD5 hash:
5602ba9f14aa3c99845b518314c4f2d5
SHA1 hash:
2fd434edd4bea9ad91801c4f50550125d8eb12fa
SH256 hash:
36585912e5eaf83ba9fea0631534f690ccdc2d7ba91537166fe53e56c221e153
MD5 hash:
862f820c3251e4ca6fc0ac00e4092239
SHA1 hash:
ef96d84b253041b090c243594f90938e9a487a9a
SH256 hash:
9e7beb8bb9b863672aaccd40867a2a4e33a9dd473fa7589cb80d3aba73339363
MD5 hash:
27d1ac19847d12e16d52de2436f8eac8
SHA1 hash:
e612a5921540cb302210ed8b1109019e37164cc2
SH256 hash:
a5c6a329698490a035133433928d04368ce6285bb91a9d074fc285de4c9a32a4
MD5 hash:
16855ebef31c5b1ebe767f1c617645b3
SHA1 hash:
315521f3a748abfa35cd4d48e8dd09d0556d989b
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
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 |
|---|---|
| Reference: | https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara |
| Rule name: | DebuggerException__SetConsoleCtrl |
|---|---|
| Reference: | https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara |
| Rule name: | Detect_PyInstaller |
|---|---|
| Author: | Obscurity Labs LLC |
| Description: | Detects PyInstaller compiled executables across platforms |
| Rule name: | golang_bin_JCorn_CSC846 |
|---|---|
| Author: | Justin Cornwell |
| Description: | CSC-846 Golang detection ruleset |
| Rule name: | PyInstaller |
|---|---|
| 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 |
|---|---|
| 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 |
|---|---|
| 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
Delivery method
Distributed via web download
Comments
Login required
You need to login to in order to write a comment. Login with your abuse.ch account.