MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 2efc26f4debc076df44e6ac846dfd3d84e31d860f1309d29e7c4beb54a748c04. 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: 2efc26f4debc076df44e6ac846dfd3d84e31d860f1309d29e7c4beb54a748c04
SHA3-384 hash: 28656942e16b113111ed5fef6e170cde1f186b5b133aea4891ae35824a8eafbd8d34dcc7bce6feede35d52eec7fd3664
SHA1 hash: 6beb85fd83e16bf76dbc42f975b02692579e444f
MD5 hash: 8e49a96dfe023c9033816228375ae6d0
humanhash: arizona-mike-potato-north
File name:ungziped_file
Download: download sample
Signature GuLoader
Create hunting rule
File size:468'328 bytes
First seen:2023-08-21 07:26:37 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 4ea4df5d94204fc550be1874e1b77ea7 (241 x GuLoader, 29 x RemcosRAT, 17 x VIPKeylogger)
ssdeep 12288:Cgk/hu4PlxetbKXNCyJmdqZF+qBRSUY/ubzdfWRPnx:oZuwlx2KXN7Jma4qHY/uPdedx
Threatray 3'583 similar samples on MalwareBazaar
TLSH T155A423C83ED6E006D85755712D5BDEB7EE7CDD2918158A0BE300B76F3B3134E2A16A82
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 969661a5b8b0b600 (1 x GuLoader)
Reporter adrian__luca
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:
Issuer:
Algorithm:sha256WithRSAEncryption
Valid from:2023-04-24T08:34:15Z
Valid to:2026-04-23T08:34:15Z
Serial number: 4adc4a4d885057807ce1bc4b717ee3523b2bae9e
Thumbprint Algorithm:SHA256
Thumbprint: 82b805e1647ed461804588473c5a28c69e76a3900f5452bb3d127bcb5d4aeb33
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
1
# of downloads :
277
Origin country :
HU HU
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
ungziped_file
Verdict:
Suspicious activity
Analysis date:
2023-08-21 07:39:59 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/a96a0740-a5a2-45c5-926b-67ae8a38113c

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/443911/
Detection(s):
SecuriteInfo.com.FileRepMalware.17136.28252.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Searching for the window
Creating a file in the %temp% directory
Creating a window
Creating a file
Result
Malware family:
n/a
Score:
  5/10
Tags:
n/a
Link:
https://dragonfly.certego.net/analysis/108192/overview
Behaviour
MalwareBazaar
Gathering data
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/2efc26f4debc076df44e6ac846dfd3d84e31d860f1309d29e7c4beb54a748c04
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/934128e4-b90a-4d6d-b691-30c7f8bcb50b
Result
Threat name:
GuLoader, FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad.spyw
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1294323
Signature
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 submitted file
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
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: 1294323 Sample: ungziped_file.exe Startdate: 21/08/2023 Architecture: WINDOWS Score: 100 34 www.yi992.com 2->34 36 www.stackview.info 2->36 38 25 other IPs or domains 2->38 46 Malicious sample detected (through community Yara rule) 2->46 48 Multi AV Scanner detection for submitted file 2->48 50 Yara detected FormBook 2->50 52 3 other signatures 2->52 10 ungziped_file.exe 4 32 2->10         started        signatures3 process4 file5 32 C:\Users\user\AppData\Local\...\System.dll, PE32 10->32 dropped 64 Tries to detect Any.run 10->64 14 ungziped_file.exe 6 10->14         started        signatures6 process7 signatures8 66 Tries to detect Any.run 14->66 68 Maps a DLL or memory area into another process 14->68 70 Queues an APC in another process (thread injection) 14->70 17 FwBpvIHFQgFD.exe 14->17 injected process9 process10 19 chkdsk.exe 13 17->19         started        22 autofmt.exe 17->22         started        signatures11 54 Tries to steal Mail credentials (via file / registry access) 19->54 56 Tries to harvest and steal browser information (history, passwords, etc) 19->56 58 Writes to foreign memory regions 19->58 60 3 other signatures 19->60 24 explorer.exe 2 1 19->24 injected 28 firefox.exe 19->28         started        30 FwBpvIHFQgFD.exe 19->30 injected process12 dnsIp13 40 www.311849tz3.xyz 91.195.240.123, 50014, 50015, 50016 SEDO-ASDE Germany 24->40 42 futuregainers.net 81.91.178.41, 49920, 49921, 49922 ON-LINE-DATAServerlocation-NetherlandsDrontenNL Russian Federation 24->42 44 14 other IPs or domains 24->44 62 System process connects to network (likely due to code injection or exploit) 24->62 signatures14
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/2efc26f4debc076df44e6ac846dfd3d84e31d860f1309d29e7c4beb54a748c04/
Threat name:
Win32.Trojan.GuLoader
Create hunting rule
Status:
Malicious
First seen:
2023-08-17 01:56:53 UTC
File Type:
PE (Exe)
Extracted files:
3
AV detection:
17 of 23 (73.91%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=f36cn5g6xqdw35conleenx6t3bhddwda6eyj2kphys7lksturqca._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
cloudeye
Create hunting rule
Similar samples:
0ead3606ff3625f1daa4c3e9a592f18f0f136d0373be4db5f1500c861cc791df
GuLoader
200100b843cccd6b1fc8f2455de2d6069aa6272b3b2d94e805ee72d08bbfd665
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5cbfb7154648241fbec88e87e2ea973816c38ee892344bd742dfc4aeb044fae3
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9dea7f3e39bd54422856d3a625d94e844ac4f37ddf0ef15163a92f6aafb5c803
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a1fc12e0b11dc727c1e4f58da908d512b2ea1fb69cc317e024390440807d62eb
GuLoader
b4ae90babbf85fb137c173dbc6a8791c9b40a7d9b32ab70ef81284736c683710
GuLoader
c1b9e627f3beaa8e365c0bdc240435e2eaf47b664d28d1c2c2fd859bd9373d7e
GuLoader
cc2ffcb49e5ff1b4f1be2c0c8f5bef3cf51caeef5fcd8be8a6367174b7dd8063
GuLoader
d744371010d5b494046c105db860eacdacd4b639408c7543407ab426f5bf4808
GuLoader
e205d9c4dd9d23e24942ad2d1439821f4fef2b7743e60a9731af35198a95eb5b
GuLoader
+ 3'573 additional samples on MalwareBazaar
Result
Malware family:
guloader
Create hunting rule
Score:
  10/10
Tags:
family:guloader downloader
Link:
https://tria.ge/reports/230821-h94l6sbe75/
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
Checks QEMU agent file
Loads dropped DLL
Guloader,Cloudeye
Unpacked files
SH256 hash:
982c5fb7ada7d8c9bc3e419d1c35da6f05bc5dd845940c179af3a33d00a36a8b
MD5 hash:
0ff2d70cfdc8095ea99ca2dabbec3cd7
SHA1 hash:
10c51496d37cecd0e8a503a5a9bb2329d9b38116
Link:
https://www.unpac.me/results/fe44bd74-1a0f-4b1e-ab8a-fcc660f9f4cc/
SH256 hash:
2efc26f4debc076df44e6ac846dfd3d84e31d860f1309d29e7c4beb54a748c04
MD5 hash:
8e49a96dfe023c9033816228375ae6d0
SHA1 hash:
6beb85fd83e16bf76dbc42f975b02692579e444f
Link:
https://www.unpac.me/results/fe44bd74-1a0f-4b1e-ab8a-fcc660f9f4cc/
Malware family:
GuLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/2efc26f4debc/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Legit
Score:
0.00
Link:
https://yomi.yoroi.company/submissions/2efc26f4debc076df44e6ac846dfd3d84e31d860f1309d29e7c4beb54a748c04

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:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:PE_Potentially_Signed_Digital_Certificate
Create hunting rule
Author:albertzsigovits

File information

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

Malspam

GuLoader

Executable exe 2efc26f4debc076df44e6ac846dfd3d84e31d860f1309d29e7c4beb54a748c04

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/443911/

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