MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b88a5b8c804822d467f30b800c594d0df466cda554045679d3917d8a4e8560e2. 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: 11


Intelligence 11 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b88a5b8c804822d467f30b800c594d0df466cda554045679d3917d8a4e8560e2
SHA3-384 hash: bf40d0d8502593cceb9ff008fe236ca7d9c846d658701a4ef315033202bb5b34e8dd0ccccea3c27b3771bae735659422
SHA1 hash: 749167a549d24a9224f53bc61510f755e4db8d1a
MD5 hash: 44370aecc3425cad9d37a16831ef32ca
humanhash: tennessee-artist-maryland-yankee
File name:SecuriteInfo.com.Trojan.NSIS.Guloader.26526.15163
Download: download sample
Signature GuLoader
Create hunting rule
File size:537'309 bytes
First seen:2023-11-03 16:13:56 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 671f2a1f8aee14d336bab98fea93d734 (182 x GuLoader, 4 x Formbook, 4 x RemcosRAT)
ssdeep 6144:cWhUjjO13a1CStqiE4pLYVqGyZ+lWpTCA2vsRnSPkTOoEp+IChSY1IB5xQTDzEfu:3e16FTA2vqSfYC3QTDzuw/t
TLSH T12EB46B7163D79CFAF42732FD78B684102457EC1B45E8420AA66EFA3891BB31168F7907
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 7ab8b296dabae6f0 (1 x GuLoader)
Reporter SecuriteInfoCom
Tags:exe GuLoader

Intelligence

File Origin
# of uploads :
1
# of downloads :
309
Origin country :
FR FR
Vendor Threat Intelligence
Detection(s):
SecuriteInfo.com.Trojan.NSIS.Guloader.26526.15163.UNOFFICIAL
Create hunting rule

Result
Verdict:
Suspicious
Maliciousness:

Behaviour
Creating a window
Creating a file
Delayed reading of the file
Searching for the window
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:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
control guloader installer lolbin overlay packed shell32
Link:
https://www.filescan.io/uploads/65451c52b50c9557591dc514/reports/0edf614e-5134-4c66-985d-2958f9214e0c/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/b88a5b8c804822d467f30b800c594d0df466cda554045679d3917d8a4e8560e2
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/65c5c02b-07ea-4f9b-95a4-39ef0b1a4280
Result
Threat name:
GuLoader, Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
80 / 100
Link:
https://www.joesandbox.com/analysis/1336802
Signature
Maps a DLL or memory area into another process
Obfuscated command line found
Sigma detected: Remcos
Yara detected GuLoader
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1336802 Sample: SecuriteInfo.com.Trojan.NSI... Startdate: 03/11/2023 Architecture: WINDOWS Score: 80 39 googlehosted.l.googleusercontent.com 2->39 41 drive.google.com 2->41 43 doc-0g-7k-docs.googleusercontent.com 2->43 51 Yara detected GuLoader 2->51 53 Yara detected Remcos RAT 2->53 55 Sigma detected: Remcos 2->55 8 SecuriteInfo.com.Trojan.NSIS.Guloader.26526.15163.exe 5 71 2->8         started        signatures3 process4 file5 35 C:\Users\user\AppData\Local\...\nsExec.dll, PE32 8->35 dropped 37 C:\Users\user\AppData\Local\...\System.dll, PE32 8->37 dropped 57 Obfuscated command line found 8->57 59 Maps a DLL or memory area into another process 8->59 12 cmd.exe 1 8->12         started        14 cmd.exe 1 8->14         started        16 cmd.exe 1 8->16         started        18 273 other processes 8->18 signatures6 process7 dnsIp8 21 conhost.exe 12->21         started        23 conhost.exe 14->23         started        25 conhost.exe 16->25         started        45 drive.google.com 142.250.217.174, 443, 50090 GOOGLEUS United States 18->45 47 googlehosted.l.googleusercontent.com 142.250.217.193, 443, 50091 GOOGLEUS United States 18->47 49 109.248.151.180, 3124 DATACLUBLV Russian Federation 18->49 27 conhost.exe 18->27         started        29 conhost.exe 18->29         started        31 conhost.exe 18->31         started        33 266 other processes 18->33 process9
Score:
96%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/b88a5b8c804822d467f30b800c594d0df466cda554045679d3917d8a4e8560e2
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b88a5b8c804822d467f30b800c594d0df466cda554045679d3917d8a4e8560e2/
Threat name:
Win32.Trojan.Guloader
Create hunting rule
Status:
Malicious
First seen:
2023-11-03 14:11:50 UTC
File Type:
PE (Exe)
Extracted files:
6
AV detection:
17 of 37 (45.95%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=xcffxdeajarniz7tboaaywknbx2gntnfkqcfm6otsf6yutufmdra._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
cloudeye
Create hunting rule
Result
Malware family:
n/a
Score:
  7/10
Tags:
n/a
Link:
https://tria.ge/reports/231103-tpmnpsee5w/
Behaviour
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Drops file in Program Files directory
Loads dropped DLL
Unpacked files
SH256 hash:
7fb0f8d452fefaac789986b933df050f3d3e4feb8a8d9944ada995f572dcdca1
MD5 hash:
dd87a973e01c5d9f8e0fcc81a0af7c7a
SHA1 hash:
c9206ced48d1e5bc648b1d0f54cccc18bf643a14
Link:
https://www.unpac.me/results/e2c297f3-0940-46c8-8283-637f1c972519/
SH256 hash:
bcb93204bd1854d0c34fa30883bab51f6813ab32abf7fb7d4aeed21d71f6af87
MD5 hash:
6c881f00ba860b17821d8813aa34dbc6
SHA1 hash:
0e5a1e09b1ce1bc758d6977b913a8d9ccbe52a13
Link:
https://www.unpac.me/results/e2c297f3-0940-46c8-8283-637f1c972519/
SH256 hash:
832da3cff792135ecb98f44c387bea3a8e2e9bd096b917303ca8b9dc71d60365
MD5 hash:
50a9396a761bf245ed4df1b08782d6f2
SHA1 hash:
e01a99100e91801abe074341b0c77cca6220f0bd
Link:
https://www.unpac.me/results/e2c297f3-0940-46c8-8283-637f1c972519/
SH256 hash:
b88a5b8c804822d467f30b800c594d0df466cda554045679d3917d8a4e8560e2
MD5 hash:
44370aecc3425cad9d37a16831ef32ca
SHA1 hash:
749167a549d24a9224f53bc61510f755e4db8d1a
Link:
https://www.unpac.me/results/e2c297f3-0940-46c8-8283-637f1c972519/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.84
Link:
https://yomi.yoroi.company/submissions/b88a5b8c804822d467f30b800c594d0df466cda554045679d3917d8a4e8560e2

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: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