MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a71c9e5f6f83bccde192cff4982c7483ceaa6c3f9e6b309f0c36cedfccf3e837. 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: 10


Intelligence 10 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a71c9e5f6f83bccde192cff4982c7483ceaa6c3f9e6b309f0c36cedfccf3e837
SHA3-384 hash: 644a13289f77131fb62f50fb5e2b306948ea083ba1bed7467208757e36f5ea7b4712867e5f3460023a4ee99453e2e4d1
SHA1 hash: c7e6bf6e433aac5d8006747e8878ea76b15e858c
MD5 hash: 772a55c751698adb2a276e42f3722d7a
humanhash: uniform-asparagus-july-snake
File name:Factura Pendiente.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:887'700 bytes
First seen:2023-10-02 12:24:18 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 671f2a1f8aee14d336bab98fea93d734 (198 x GuLoader, 4 x Formbook, 4 x RemcosRAT)
ssdeep 24576:INPx3TpZ46uhgbeBcWI6Wqz6uc1L9J8xVCT5ATqY2BXY6+g7:mBTveBcZ6Wqz6VL9J8xVCT5AT2Y6N
Threatray 287 similar samples on MalwareBazaar
TLSH T1C015239015F0C8B7EB776138C8D64B1EAFF9ED20666B87434B017E48BD366D286163E4
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)
Reporter lowmal3
Tags:exe GuLoader

Intelligence

File Origin
# of uploads :
1
# of downloads :
307
Origin country :
DE DE
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/452610/
Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a window
Creating a file
Creating a file in the %temp% subdirectories
Sending a custom TCP request
Gathering data
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
control lolbin masquerade overlay packed shell32
Link:
https://www.filescan.io/uploads/651ab69e1edabd9982a30ce5/reports/15f4084f-20d5-4b5d-978a-0db68baa365a/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_70%
Link:
https://www.hybrid-analysis.com/sample/a71c9e5f6f83bccde192cff4982c7483ceaa6c3f9e6b309f0c36cedfccf3e837
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:
Suspicious
Link:
https://analyze.intezer.com/analyses/3977fbbd-2139-4937-8b48-a3834c6134b5
Result
Threat name:
GuLoader, FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad.spyw
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1317897
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
Injects a PE file into a foreign processes
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)
Multi AV Scanner detection for domain / URL
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)
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: 1317897 Sample: Factura_Pendiente.exe Startdate: 02/10/2023 Architecture: WINDOWS Score: 100 34 www.dd55hh.xyz 2->34 36 www.yokaiph.store 2->36 38 19 other IPs or domains 2->38 52 Snort IDS alert for network traffic 2->52 54 Multi AV Scanner detection for domain / URL 2->54 56 Malicious sample detected (through community Yara rule) 2->56 60 5 other signatures 2->60 10 Factura_Pendiente.exe 38 2->10         started        signatures3 58 Performs DNS queries to domains with low reputation 34->58 process4 file5 32 C:\Users\user\AppData\Local\...\System.dll, PE32 10->32 dropped 72 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 10->72 74 Tries to detect Any.run 10->74 14 Factura_Pendiente.exe 6 10->14         started        signatures6 process7 dnsIp8 46 drive.google.com 142.250.68.110, 443, 49998 GOOGLEUS United States 14->46 48 googlehosted.l.googleusercontent.com 142.250.72.161, 443, 49999 GOOGLEUS United States 14->48 76 Tries to detect Any.run 14->76 78 Maps a DLL or memory area into another process 14->78 80 Queues an APC in another process (thread injection) 14->80 18 oTsaLmkfaqbdMcsfMbfWwptvfik.exe 14->18 injected signatures9 process10 signatures11 50 Sample uses process hollowing technique 18->50 21 cmd.exe 13 18->21         started        process12 signatures13 62 Tries to steal Mail credentials (via file / registry access) 21->62 64 Tries to harvest and steal browser information (history, passwords, etc) 21->64 66 Writes to foreign memory regions 21->66 68 3 other signatures 21->68 24 explorer.exe 4 1 21->24 injected 28 firefox.exe 21->28         started        30 oTsaLmkfaqbdMcsfMbfWwptvfik.exe 21->30 injected process14 dnsIp15 40 www.yokaiph.store 185.27.134.59, 50023, 50024, 50025 WILDCARD-ASWildcardUKLimitedGB United Kingdom 24->40 42 cvanalysiswithai.com 67.20.76.62, 50015, 50016, 50017 UNIFIEDLAYER-AS-1US United States 24->42 44 8 other IPs or domains 24->44 70 System process connects to network (likely due to code injection or exploit) 24->70 signatures16
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a71c9e5f6f83bccde192cff4982c7483ceaa6c3f9e6b309f0c36cedfccf3e837/
Threat name:
Win32.Trojan.Generic
Create hunting rule
Status:
Malicious
First seen:
2023-10-02 10:00:13 UTC
File Type:
PE (Exe)
Extracted files:
13
AV detection:
12 of 37 (32.43%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=u4oj4x3pqo6m3ymsz72jqlduqphku3b7tzvtbhymg3hn7tht5a3q._file
Verdict:
unknown
Similar samples:
121dae49dacf1290b5ef4de577a01161b523d9edf8564fa765e7c00ac6c3b862
GuLoader
1a340a1a7fac27ac3b7457ae56e0aa92a493c74a4fb4507d27245293783e8edd
GuLoader
43f1463dd71cfcc3376f99056faf2c0ca6d35bacdd1a68db39b55c7179caf733
GuLoader
6518dc835d22e7520ce00460a18304bce53a4dee89b4236dcacf3b4f071868d1
GuLoader
87a8c6294c7bfeece375857edf3b1a16a2a7c1d42fc9f2463e31f45b36135ef1
GuLoader
8de44c6d5f3c81b21ca61235a70d87c705c3b47127c9815628df1e1b1344a32b
GuLoader
c1d4497629dff8c33f099d57352369ed56a081ce083a94d76b294d01b3e7479d
GuLoader
ccb00726db19c3c19f4d2747fdc43b1a1bb6ed8d902ed9c45caf5fae7ad0de55
GuLoader
d26418368c830b9d0cc5755e18cc1510288321fbab271eb301c457c3714fe79a
GuLoader
f597a169eff0fcb60de34630635da598c0b90ff4c96764844d0aebca18fa3988
GuLoader
+ 277 additional samples on MalwareBazaar
Result
Malware family:
guloader
Create hunting rule
Score:
  10/10
Tags:
family:guloader downloader
Link:
https://tria.ge/reports/231002-pllj1sag6s/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Legitimate hosting services abused for malware hosting/C2
Checks QEMU agent file
Checks computer location settings
Loads dropped DLL
Guloader,Cloudeye
Unpacked files
SH256 hash:
7fb0f8d452fefaac789986b933df050f3d3e4feb8a8d9944ada995f572dcdca1
MD5 hash:
dd87a973e01c5d9f8e0fcc81a0af7c7a
SHA1 hash:
c9206ced48d1e5bc648b1d0f54cccc18bf643a14
Link:
https://www.unpac.me/results/ccbaa325-57ae-4cf9-bb7f-d6f71f783c3e/
SH256 hash:
a71c9e5f6f83bccde192cff4982c7483ceaa6c3f9e6b309f0c36cedfccf3e837
MD5 hash:
772a55c751698adb2a276e42f3722d7a
SHA1 hash:
c7e6bf6e433aac5d8006747e8878ea76b15e858c
Link:
https://www.unpac.me/results/ccbaa325-57ae-4cf9-bb7f-d6f71f783c3e/
Malware family:
GuLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/a71c9e5f6f83/report/overview.html
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/a71c9e5f6f83bccde192cff4982c7483ceaa6c3f9e6b309f0c36cedfccf3e837

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.

Malspam

GuLoader

Executable exe a71c9e5f6f83bccde192cff4982c7483ceaa6c3f9e6b309f0c36cedfccf3e837

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/452610/

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