MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c23a686bae9a2a6cdf2038427faca4bef69d69108c934ea79992eff2aca47ece. 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 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: c23a686bae9a2a6cdf2038427faca4bef69d69108c934ea79992eff2aca47ece
SHA3-384 hash: f180f617e52cb22f3752616d4ab1b614b16d15bb125f2c71fc8323d787cf1654be69d6871f4474ad20a755f2b2b6f65e
SHA1 hash: c153a711934700cfb47ccbe240cbf89f8c02d96c
MD5 hash: f8fe9bbf31fa51459f1a1073e72746b7
humanhash: michigan-four-two-pennsylvania
File name:NNL PO 1023008.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:449'432 bytes
First seen:2023-11-08 22:53:12 UTC
Last seen:2023-11-09 00:29:31 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 671f2a1f8aee14d336bab98fea93d734 (182 x GuLoader, 4 x Formbook, 4 x RemcosRAT)
ssdeep 6144:mWhUjHlmkDoAsNW3uT/MFdkGba/Fz5F2BXsGY3GoY8afm9v08FRCgijVjCmy/8ui:tQFsVouTVx9zwX9Ys/kv0eojVy
Threatray 60 similar samples on MalwareBazaar
TLSH T1B1A4012F3A21C8E6F94843B48B368B0756DA6847128214577B71BBBCAB357C3D90F5C9
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 8883b69d19c6c3c0 (38 x GuLoader, 6 x RemcosRAT, 6 x VIPKeylogger)
Reporter malwarelabnet
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:
Issuer:
Algorithm:sha256WithRSAEncryption
Valid from:2023-09-24T01:27:46Z
Valid to:2026-09-23T01:27:46Z
Serial number: 027b0bff1ff1a7a95d0bee93f7b8e8a256897d77
Thumbprint Algorithm:SHA256
Thumbprint: a24f36e86ac3d50b74a3d4de7279233343104c6250b6d52be7f872daab6ab9e4
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
2
# of downloads :
358
Origin country :
CA CA
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
c23a686bae9a2a6cdf2038427faca4bef69d69108c934ea79992eff2aca47ece.zip
Verdict:
Malicious activity
Analysis date:
2023-11-09 01:24:32 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/94d836ba-61cb-46c2-8b17-605d25169b5f

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Win32.Evo-gen.16350.24502.UNOFFICIAL
Create hunting rule

Result
Verdict:
Suspicious
Maliciousness:

Behaviour
Searching for the window
Creating a window
Creating a file in the %AppData% subdirectories
Delayed reading of the file
Creating a file in the %temp% subdirectories
Searching for the Windows task manager window
Running batch commands
Creating a process with a hidden window
Sending a custom TCP request
Gathering data
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
control guloader installer lolbin overlay packed shell32
Link:
https://www.filescan.io/uploads/654c118c3dd412119bf281ff/reports/33073a2a-abc5-4ab8-bbec-9142fa9d23bc/overview
Verdict:
Malicious
Labled as:
Babar.Generic
Link:
https://www.hybrid-analysis.com/sample/c23a686bae9a2a6cdf2038427faca4bef69d69108c934ea79992eff2aca47ece
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/0b40b0f9-6403-49cc-93f2-02b7379b09a7
Result
Threat name:
GuLoader, FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad.spyw
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1339385
Signature
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Multi AV Scanner detection for submitted file
Obfuscated command line found
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Writes to foreign memory regions
Yara detected FormBook
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1339385 Sample: NNL_PO_1023008.exe Startdate: 09/11/2023 Architecture: WINDOWS Score: 100 50 www.viough.com 2->50 52 www.tunug.xyz 2->52 54 23 other IPs or domains 2->54 66 Malicious sample detected (through community Yara rule) 2->66 68 Multi AV Scanner detection for submitted file 2->68 70 Yara detected FormBook 2->70 72 3 other signatures 2->72 10 NNL_PO_1023008.exe 2 80 2->10         started        signatures3 process4 file5 46 C:\Users\user\AppData\Local\...\nsExec.dll, PE32 10->46 dropped 48 C:\Users\user\AppData\Local\...\System.dll, PE32 10->48 dropped 82 Obfuscated command line found 10->82 84 Sample uses process hollowing technique 10->84 14 NNL_PO_1023008.exe 10->14         started        18 cmd.exe 1 10->18         started        20 cmd.exe 1 10->20         started        22 271 other processes 10->22 signatures6 process7 dnsIp8 62 googlehosted.l.googleusercontent.com 192.178.50.65, 443, 49829 GOOGLEUS United States 14->62 64 drive.google.com 192.178.50.78, 443, 49828 GOOGLEUS United States 14->64 86 Maps a DLL or memory area into another process 14->86 24 RBSGfFEFPUoYNoRXLs.exe 14->24 injected 26 conhost.exe 18->26         started        28 conhost.exe 20->28         started        30 conhost.exe 22->30         started        32 conhost.exe 22->32         started        34 conhost.exe 22->34         started        36 267 other processes 22->36 signatures9 process10 process11 38 SearchProtocolHost.exe 24->38         started        signatures12 74 Tries to steal Mail credentials (via file / registry access) 38->74 76 Tries to harvest and steal browser information (history, passwords, etc) 38->76 78 Writes to foreign memory regions 38->78 80 3 other signatures 38->80 41 RBSGfFEFPUoYNoRXLs.exe 38->41 injected 44 firefox.exe 38->44         started        process13 dnsIp14 56 rocsys.net 37.97.254.27, 49835, 49836, 49837 TRANSIP-ASAmsterdamtheNetherlandsNL Netherlands 41->56 58 ayotundewrites.com 83.229.19.76, 49863, 49864, 49865 SKYVISIONGB United Kingdom 41->58 60 13 other IPs or domains 41->60
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/c23a686bae9a2a6cdf2038427faca4bef69d69108c934ea79992eff2aca47ece
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/c23a686bae9a2a6cdf2038427faca4bef69d69108c934ea79992eff2aca47ece/
Threat name:
Win32.Trojan.GuLoader
Create hunting rule
Status:
Malicious
First seen:
2023-11-08 19:41:57 UTC
File Type:
PE (Exe)
Extracted files:
6
AV detection:
18 of 24 (75.00%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=yi5gq25otivgzxzahbbh7lfex33j22iqrsju5j4zslx7flfep3ha._file
Verdict:
malicious
Label(s):
cloudeye
Create hunting rule
Similar samples:
1a3fcc316f4b8b404415a1e22f414431144fe6798374cc860a40eddceae9c31d
GuLoader
27f598db14b0b24b388c48d2856045bdd2675e3bb82db4c91046bc04de6ef094
GuLoader
3c969a06b2e8fe7fc4ad81ca5005713f4c9638c6ad36be3949fea7a0cea62204
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b88a5b8c804822d467f30b800c594d0df466cda554045679d3917d8a4e8560e2
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defaa7299868b133e17be2d9e306ffe90b6fee35f5efdc6b234593f5321d9ee5
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ec241309fc78d60ecc7dcb95440d4989ee2e46b154f0144eab1891651ffbbcee
GuLoader
ec604e744a669546187f8460fa7f28a4deccefb8ec1bdd2115d593351b609d93
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fe0ebb0420900acf0275c41641ae45ce2bb9d581ffa67b4a9897336be4fcd9fc
GuLoader
+ 50 additional samples on MalwareBazaar
Result
Malware family:
guloader
Create hunting rule
Score:
  10/10
Tags:
family:guloader downloader
Link:
https://tria.ge/reports/231108-2vhwpsfe54/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Drops file in Windows directory
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Legitimate hosting services abused for malware hosting/C2
Loads dropped DLL
Guloader,Cloudeye
Unpacked files
SH256 hash:
7fb0f8d452fefaac789986b933df050f3d3e4feb8a8d9944ada995f572dcdca1
MD5 hash:
dd87a973e01c5d9f8e0fcc81a0af7c7a
SHA1 hash:
c9206ced48d1e5bc648b1d0f54cccc18bf643a14
Link:
https://www.unpac.me/results/71c1ca78-8367-45fe-b691-b95200a2f33d/
SH256 hash:
bcb93204bd1854d0c34fa30883bab51f6813ab32abf7fb7d4aeed21d71f6af87
MD5 hash:
6c881f00ba860b17821d8813aa34dbc6
SHA1 hash:
0e5a1e09b1ce1bc758d6977b913a8d9ccbe52a13
Link:
https://www.unpac.me/results/71c1ca78-8367-45fe-b691-b95200a2f33d/
SH256 hash:
832da3cff792135ecb98f44c387bea3a8e2e9bd096b917303ca8b9dc71d60365
MD5 hash:
50a9396a761bf245ed4df1b08782d6f2
SHA1 hash:
e01a99100e91801abe074341b0c77cca6220f0bd
Link:
https://www.unpac.me/results/71c1ca78-8367-45fe-b691-b95200a2f33d/
SH256 hash:
c23a686bae9a2a6cdf2038427faca4bef69d69108c934ea79992eff2aca47ece
MD5 hash:
f8fe9bbf31fa51459f1a1073e72746b7
SHA1 hash:
c153a711934700cfb47ccbe240cbf89f8c02d96c
Link:
https://www.unpac.me/results/71c1ca78-8367-45fe-b691-b95200a2f33d/
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/c23a686bae9a2a6cdf2038427faca4bef69d69108c934ea79992eff2aca47ece

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:PE_Potentially_Signed_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:shellcode
Create hunting rule
Author:nex
Description:Matched shellcode byte patterns

File information

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

Comments