MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4c1e7019090e7e9c42dc1efe990ea7ae94563a3f35a2745c6142be8ca981df6a. 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: 12


Intelligence 12 IOCs YARA 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4c1e7019090e7e9c42dc1efe990ea7ae94563a3f35a2745c6142be8ca981df6a
SHA3-384 hash: b7783acfe939ab08019d1db5ea60c8ed67ed2f4f42799342e3d981ca411f03ddcffc3c644efdf3ca470773ce97e8560f
SHA1 hash: 397d75cbd7563fc8807351588cff1c5aebbf49d0
MD5 hash: bc7725beba4203506dbd644dc3a049c9
humanhash: thirteen-timing-leopard-mirror
File name:default.dat
Download: download sample
Signature Efimer
Create hunting rule
File size:14'282'788 bytes
First seen:2026-07-05 17:52:11 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash dcaf48c1f10b0efa0a4472200f3850ed (180 x Efimer, 60 x BlankGrabber, 22 x NetSupport)
ssdeep 393216:SmATml7dvqbLYorR4d4XMCHWUjXCcuI3/PGTAI:xqWvi4eXMb8X/H/O7
TLSH T197E63354A4E403EAE5B3007DECE25194D6A474B28BBBC6DF5B688775FE931C0083AB53
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 (1 x Efimer)
Reporter aachum
Tags:ClickFix Efimer exe


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

Intelligence

File Origin
# of uploads :
1
# of downloads :
166
Origin country :
ES ES
Vendor Threat Intelligence
Malware configuration found for:
PyInstaller
Details
Link:
https://research.acce.ciphertechsolutions.com/results/46c6e213-da59-4b1c-a770-1485ca0f2bed/
Malware family:
n/a
ID:
1
File name:
exe
Verdict:
No threats detected
Analysis date:
2026-07-05 17:52:55 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/c5817c05-395f-48ea-a82a-ce34efb7e835

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/73015/
Detection(s):
SecuriteInfo.com.Variant.Dropper.354.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
94.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6a4a99e432952f8351d02ca0
Tags:
installer shell sage
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/6a4a99db7ba640d64f6af03a/reports/69efbead-de3b-4c1b-bee6-33279502dbe5/overview
Verdict:
Malicious
Labled as:
Yogi.Generic
Link:
https://www.hybrid-analysis.com/sample/4c1e7019090e7e9c42dc1efe990ea7ae94563a3f35a2745c6142be8ca981df6a
Verdict:
Malicious
File Type:
exe x64
First seen:
2026-07-05T14:58:00Z UTC
Last seen:
2026-07-07T04:53:00Z UTC
Hits:
~10
Detections:
HEUR:Trojan.Python.Agent.gen HEUR:Trojan-PSW.Python.Agent.gen Trojan-PSW.Win32.Coins.sb Trojan-PSW.MSIL.Stealer.sb
Link:
https://opentip.kaspersky.com/4c1e7019090e7e9c42dc1efe990ea7ae94563a3f35a2745c6142be8ca981df6a/results?tab=lookup
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/a4b4640d-d803-4df9-a423-1e68134095c2
Result
Threat name:
n/a
Detection:
malicious
Classification:
evad
Score:
72 / 100
Link:
https://www.joesandbox.com/analysis/1937592
Signature
Adds a directory exclusion to Windows Defender
Found pyInstaller with non standard icon
Joe Sandbox ML detected suspicious sample
Loading BitLocker PowerShell Module
Multi AV Scanner detection for submitted file
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Sigma detected: Suspicious Script Execution From Temp Folder
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1937592 Sample: default.dat.exe Startdate: 05/07/2026 Architecture: WINDOWS Score: 72 56 Multi AV Scanner detection for submitted file 2->56 58 Joe Sandbox ML detected suspicious sample 2->58 60 Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet 2->60 62 Sigma detected: Suspicious Script Execution From Temp Folder 2->62 8 default.dat.exe 31 2->8         started        12 svchost.exe 1 1 2->12         started        process3 dnsIp4 46 C:\Users\user\AppData\...\unicodedata.pyd, PE32+ 8->46 dropped 48 C:\Users\user\AppData\Local\...\select.pyd, PE32+ 8->48 dropped 50 C:\Users\user\AppData\Local\...\python313.dll, PE32+ 8->50 dropped 52 15 other files (none is malicious) 8->52 dropped 66 Adds a directory exclusion to Windows Defender 8->66 68 Found pyInstaller with non standard icon 8->68 15 default.dat.exe 1 8->15         started        54 127.0.0.1 unknown unknown 12->54 file5 signatures6 process7 signatures8 72 Adds a directory exclusion to Windows Defender 15->72 18 cmd.exe 1 15->18         started        21 cmd.exe 1 15->21         started        23 cmd.exe 1 15->23         started        25 9 other processes 15->25 process9 signatures10 64 Adds a directory exclusion to Windows Defender 18->64 27 powershell.exe 23 18->27         started        30 conhost.exe 18->30         started        32 powershell.exe 23 21->32         started        34 conhost.exe 21->34         started        36 powershell.exe 23 23->36         started        38 conhost.exe 23->38         started        40 powershell.exe 25->40         started        42 powershell.exe 25->42         started        44 16 other processes 25->44 process11 signatures12 70 Loading BitLocker PowerShell Module 36->70
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/4c1e7019090e7e9c42dc1efe990ea7ae94563a3f35a2745c6142be8ca981df6a
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4c1e7019090e7e9c42dc1efe990ea7ae94563a3f35a2745c6142be8ca981df6a/
Verdict:
Malicious
Threat:
Trojan.Python.Agent
Link:
https://tip.neiki.dev/file/4c1e7019090e7e9c42dc1efe990ea7ae94563a3f35a2745c6142be8ca981df6a
Threat name:
Win64.Trojan.Egairtigado
Create hunting rule
Status:
Malicious
First seen:
2026-07-05 17:53:37 UTC
File Type:
PE+ (Exe)
Extracted files:
482
AV detection:
16 of 38 (42.11%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=jqphagijbz7jyqw4d37jsdvhv2kfmor7gwrhixdbik7izkmb35va._file
Result
Malware family:
n/a
Score:
  8/10
Tags:
execution pyarmor pyinstaller
Link:
https://tria.ge/reports/260705-wfyqqaat6k/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Loads dropped DLL
Command and Scripting Interpreter: PowerShell
Unpacked files
SH256 hash:
4c1e7019090e7e9c42dc1efe990ea7ae94563a3f35a2745c6142be8ca981df6a
MD5 hash:
bc7725beba4203506dbd644dc3a049c9
SHA1 hash:
397d75cbd7563fc8807351588cff1c5aebbf49d0
Link:
https://www.unpac.me/results/d9720e52-0e5b-40c9-ae71-97c55ab06046/
SH256 hash:
36585912e5eaf83ba9fea0631534f690ccdc2d7ba91537166fe53e56c221e153
MD5 hash:
862f820c3251e4ca6fc0ac00e4092239
SHA1 hash:
ef96d84b253041b090c243594f90938e9a487a9a
Link:
https://www.unpac.me/results/d9720e52-0e5b-40c9-ae71-97c55ab06046/
SH256 hash:
4e5d5d20d6d31e72ab341c81e97b89e514326c4c861b48638243bdf0918cfa43
MD5 hash:
123ad0908c76ccba4789c084f7a6b8d0
SHA1 hash:
86de58289c8200ed8c1fc51d5f00e38e32c1aad5
Link:
https://www.unpac.me/results/d9720e52-0e5b-40c9-ae71-97c55ab06046/
SH256 hash:
7dce140c38aba6be590a0225302628063d17d32eb9e2daa3c145b6cda864b320
MD5 hash:
cd7e4504acea5d042248f7707244fa61
SHA1 hash:
5c9b60727838a63857861537a69ffa638ea6bf60
Link:
https://www.unpac.me/results/d9720e52-0e5b-40c9-ae71-97c55ab06046/
SH256 hash:
82a2f9ae1e6146ae3cb0f4bc5a62b7227e0384209d9b1aef86bbcc105912f7cd
MD5 hash:
68156f41ae9a04d89bb6625a5cd222d4
SHA1 hash:
3be29d5c53808186eba3a024be377ee6f267c983
Link:
https://www.unpac.me/results/d9720e52-0e5b-40c9-ae71-97c55ab06046/
SH256 hash:
a5c6a329698490a035133433928d04368ce6285bb91a9d074fc285de4c9a32a4
MD5 hash:
16855ebef31c5b1ebe767f1c617645b3
SHA1 hash:
315521f3a748abfa35cd4d48e8dd09d0556d989b
Link:
https://www.unpac.me/results/d9720e52-0e5b-40c9-ae71-97c55ab06046/
SH256 hash:
eff52743773eb550fcc6ce3efc37c85724502233b6b002a35496d828bd7b280a
MD5 hash:
0f8e4992ca92baaf54cc0b43aaccce21
SHA1 hash:
c7300975df267b1d6adcbac0ac93fd7b1ab49bd2
Link:
https://www.unpac.me/results/d9720e52-0e5b-40c9-ae71-97c55ab06046/
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/4c1e7019090e7e9c42dc1efe990ea7ae94563a3f35a2745c6142be8ca981df6a

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 4c1e7019090e7e9c42dc1efe990ea7ae94563a3f35a2745c6142be8ca981df6a

(this sample)

  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/73015/

Comments