MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4e57a7ae42e9005020df2671b6aa6cf19d044be264da5f8e1a4836d5a47b2f14. 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


GuLoader


Vendor detections: 13


Intelligence 13 IOCs YARA 3 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4e57a7ae42e9005020df2671b6aa6cf19d044be264da5f8e1a4836d5a47b2f14
SHA3-384 hash: 6398b8737c9b982b7b32fd8b91a96fa8ec31826b6b2afcbe9fa9088c04e80e6252d39c9ade7d3f3226fab20336ee061b
SHA1 hash: 754e42ede6c7d66fee0c161538ba7f274b09c613
MD5 hash: 8f25fe4c31de1a795ca154d7dacad298
humanhash: venus-cold-hotel-golf
File name:8f25fe4c31de1a795ca154d7dacad298
Download: download sample
Signature GuLoader
Create hunting rule
File size:1'042'896 bytes
First seen:2023-06-08 06:18:24 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 3abe302b6d9a1256e6a915429af4ffd2 (277 x GuLoader, 38 x Formbook, 25 x Loki)
ssdeep 24576:ePLjh9E6G3VibpHIdebodR6jlKFtQVUv+iP8o79bO+:2jh3G32poHRS2tQuWikK9j
Threatray 2'099 similar samples on MalwareBazaar
TLSH T1B725235249D44FDBF00852B02AE38A6B727A75241C27F1476B189FDBA6E7113C81E1CF
TrID 47.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
15.9% (.EXE) Win64 Executable (generic) (10523/12/4)
9.9% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
7.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
6.8% (.EXE) Win32 Executable (generic) (4505/5/1)
File icon (PE):PE icon
dhash icon d0f4ecceec989280 (3 x GuLoader, 1 x AgentTesla, 1 x Formbook)
Reporter zbetcheckin
Tags:32 exe GuLoader signed

Code Signing Certificate

Organisation:
Issuer:
Algorithm:sha256WithRSAEncryption
Valid from:2023-01-07T04:21:01Z
Valid to:2026-01-06T04:21:01Z
Serial number: 28e2035c8781ff1994b12e2e1ab8d595015f8c3d
Thumbprint Algorithm:SHA256
Thumbprint: c7f683c671b7626a406368d8c8948b6275ee9da0b50a8c261034aacf20eb650b
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
1
# of downloads :
310
Origin country :
FR FR
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
f773fdea0e32c51ffea025bc50767210
Verdict:
Malicious activity
Analysis date:
2023-06-08 05:21:55 UTC
Tags:
opendir exploit cve-2017-11882 loader
Link:
https://app.any.run/tasks/23b6cef3-633c-4290-b1c9-23907bd74f9e

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/396803/
Detection(s):
SecuriteInfo.com.Adware.Downware.19579.26308.2454.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a window
Creating a file in the %temp% subdirectories
Searching for the window
Sending a custom TCP request
Result
Malware family:
n/a
Score:
  5/10
Tags:
n/a
Link:
https://dragonfly.certego.net/analysis/89904/overview
Behaviour
MalwareBazaar
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
buer lolbin overlay packed shell32.dll
Link:
https://www.filescan.io/uploads/648172da8237763a9bd67289/reports/403c1b03-fc91-485d-ac8d-8643aea623c4/overview
Verdict:
Malicious
Labled as:
Tedy.Generic
Link:
https://www.hybrid-analysis.com/sample/4e57a7ae42e9005020df2671b6aa6cf19d044be264da5f8e1a4836d5a47b2f14
Result
Verdict:
MALICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/f385f465-990d-4df1-983d-8fab4b2183bf
Result
Threat name:
GuLoader, FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1250924
Signature
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Found malware configuration
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Modifies the context of a thread in another process (thread injection)
Modifies the prolog of user mode functions (user mode inline hooks)
Multi AV Scanner detection for submitted file
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Snort IDS alert for network traffic
System process connects to network (likely due to code injection or exploit)
Tries to detect Any.run
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Yara detected FormBook
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 883940 Sample: ir4uOmf7Ic.exe Startdate: 08/06/2023 Architecture: WINDOWS Score: 100 34 www.92dbxvhr.xyz 2->34 36 www.wearerdio.store 2->36 38 28 other IPs or domains 2->38 56 Snort IDS alert for network traffic 2->56 58 Found malware configuration 2->58 60 Malicious sample detected (through community Yara rule) 2->60 64 7 other signatures 2->64 11 ir4uOmf7Ic.exe 2 25 2->11         started        signatures3 62 Performs DNS queries to domains with low reputation 34->62 process4 file5 32 C:\Users\user\AppData\Local\...\System.dll, PE32 11->32 dropped 72 Tries to detect Any.run 11->72 15 ir4uOmf7Ic.exe 6 11->15         started        signatures6 process7 dnsIp8 46 107.172.148.208, 50149, 80 AS-COLOCROSSINGUS United States 15->46 48 Modifies the context of a thread in another process (thread injection) 15->48 50 Tries to detect Any.run 15->50 52 Maps a DLL or memory area into another process 15->52 54 2 other signatures 15->54 19 explorer.exe 6 1 15->19 injected signatures9 process10 dnsIp11 40 bancaf8.net 202.92.7.99, 50163, 80 VNPT-AS-VNVNPTCorpVN Viet Nam 19->40 42 www.kolapsgretel.cfd 109.123.121.243, 50153, 80 UK2NET-ASGB United Kingdom 19->42 44 9 other IPs or domains 19->44 66 System process connects to network (likely due to code injection or exploit) 19->66 23 cmstp.exe 19->23         started        26 autochk.exe 19->26         started        signatures12 process13 signatures14 68 Modifies the context of a thread in another process (thread injection) 23->68 70 Maps a DLL or memory area into another process 23->70 28 cmd.exe 1 23->28         started        process15 process16 30 conhost.exe 28->30         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4e57a7ae42e9005020df2671b6aa6cf19d044be264da5f8e1a4836d5a47b2f14/
Threat name:
Win32.Trojan.Guloader
Create hunting rule
Status:
Malicious
First seen:
2023-06-07 14:09:04 UTC
File Type:
PE (Exe)
Extracted files:
4
AV detection:
11 of 24 (45.83%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=jzl2plsc5eafaig7ezy3nktm6goqis7cmtnf7dq2ja3nljd3f4ka._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
520332210fa79a3628b8a514f18ba872117489cb013809161629d1443d8ae800
GuLoader
734bbe06c909b28854008cc74bfb94d4bcb19d5e9d1c58bc5e00da61f85c4cfe
GuLoader
8dbb132dccc8fb8a83062fec3840b1556a75862c07d22a0740ca095698ed0f6d
GuLoader
909735e8a902e299207563464959d2b7a8d3821e74cdb1aade9a17162c599e23
GuLoader
9c1292869bf34d5077f8f2bffd19ff671a0dcd996734c3d8af1e484cac42d80d
GuLoader
afbccae6537d0602edbc99ef03ec8b89ec23df241079f949c0b8a0aa6f9aa8f0
GuLoader
d22aed126e64e2ca691c2b8779d7e18f557de18757ba56e265608890960cd09e
GuLoader
f7bb2d35300a95c164089832c13410023d2293390130109ae3693fd0d05a3df8
GuLoader
fef348f0a51720ef524010b7225f6d338e10654e4fc13f4a6b89b07deafd35f7
GuLoader
+ 2'089 additional samples on MalwareBazaar
Result
Malware family:
guloader
Create hunting rule
Score:
  10/10
Tags:
family:formbook family:guloader campaign:be03 downloader rat spyware stealer trojan
Link:
https://tria.ge/reports/230608-g26wwsde5t/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Checks QEMU agent file
Loads dropped DLL
Formbook payload
Formbook
Guloader,Cloudeye
Unpacked files
SH256 hash:
a1390a78533c47e55cc364e97af431117126d04a7faed49390210ea3e89dd0e1
MD5 hash:
fbe295e5a1acfbd0a6271898f885fe6a
SHA1 hash:
d6d205922e61635472efb13c2bb92c9ac6cb96da
Link:
https://www.unpac.me/results/3784ef14-bcb2-41c4-8386-c1c2dfa97d9f/
SH256 hash:
4e57a7ae42e9005020df2671b6aa6cf19d044be264da5f8e1a4836d5a47b2f14
MD5 hash:
8f25fe4c31de1a795ca154d7dacad298
SHA1 hash:
754e42ede6c7d66fee0c161538ba7f274b09c613
Link:
https://www.unpac.me/results/3784ef14-bcb2-41c4-8386-c1c2dfa97d9f/
Malware family:
GuLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/4e57a7ae42e9/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
GuLoader
Score:
0.90
Link:
https://yomi.yoroi.company/submissions/4e57a7ae42e9005020df2671b6aa6cf19d044be264da5f8e1a4836d5a47b2f14

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:Ins_NSIS_Buer_Nov_2020_1
Create hunting rule
Author:Arkbird_SOLG
Description:Detect NSIS installer used for Buer loader
Rule name:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:SUSP_NullSoftInst_Combo_Oct20_1
Create hunting rule
Author:Florian Roth (Nextron Systems)
Description:Detects suspicious NullSoft Installer combination with common Copyright strings
Reference:https://twitter.com/malwrhunterteam/status/1313023627177193472

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Web download

GuLoader

Executable exe 4e57a7ae42e9005020df2671b6aa6cf19d044be264da5f8e1a4836d5a47b2f14

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/2655419/
Cape
Cape
https://www.capesandbox.com/analysis/396803/

Comments


Avatar
zbet commented on 2023-06-08 06:18:24 UTC

url : hxxp://103.170.120.247/winSpace/wininit.exe