MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4f8130693067523c153d09b000e48e744ca3b86388221a840349746ea6e561df. 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: 7


Intelligence 7 IOCs YARA File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4f8130693067523c153d09b000e48e744ca3b86388221a840349746ea6e561df
SHA3-384 hash: d3a382b115a442b6fbbf3ae408b1f3ed80f3f0e6314de8d3c779179a514ef81b25a8e1d60b4e4a285f62a2d3d61782a6
SHA1 hash: de7191d73f9a77396a5660224e10127aa6d5d4a4
MD5 hash: 82063388d4537cea5b9ff5333709fcde
humanhash: pennsylvania-mobile-ack-pasta
File name:CV.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:571'392 bytes
First seen:2020-08-11 10:55:17 UTC
Last seen:2020-08-11 12:13:57 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash df85ac537d57e3a7e2b1ddaa5fca9ad3 (3 x AgentTesla, 2 x Formbook, 2 x HawkEye)
ssdeep 12288:vV5mZ52HqKRoIYXSi8yrxEMPqdeeJoJ6kDfU:d8ZqbfksrJoJ6kDfU
Threatray 11'764 similar samples on MalwareBazaar
TLSH 5FC4E612F0D084BFC22B357C697643AA7735E930FB1410E9AE9E99EC4BB5DC92C5508B
Reporter abuse_ch
Tags:exe GuLoader


Avatar
abuse_ch
Malspam distributing unidentified malware:

HELO: yahoo.com
Sending IP: 5.79.121.92
From: Nitheesh Thomas <NitheeshThomas101@yahoo.com>
Subject: CV
Attachment: CV.iso (contains "CV.exe")

Intelligence

File Origin
# of uploads :
2
# of downloads :
128
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/43252/
Detection(s):
PUA.Win.Adware.Slugin-6803969-0
Create hunting rule

PUA.Win.Adware.Slugin-6840354-0
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a window
Unauthorized injection to a recently created process
Sending a UDP request
Result
Threat name:
AgentTesla GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/418492
Signature
Contains functionality to detect hardware virtualization (CPUID execution measurement)
Contains functionality to detect sleep reduction / modifications
Detected unpacking (changes PE section rights)
Detected unpacking (overwrites its own PE header)
Found malware configuration
Hides threads from debuggers
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
May check the online IP address of the machine
Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)
Tries to detect Any.run
Tries to detect virtualization through RDTSC time measurements
Tries to harvest and steal browser information (history, passwords, etc)
Tries to harvest and steal ftp login credentials
Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc)
Tries to steal Mail credentials (via file access)
Yara detected Agent Tesla Trojan
Yara detected AgentTesla
Yara detected GuLoader
Yara detected VB6 Downloader Generic
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 261524 Sample: CV.exe Startdate: 11/08/2020 Architecture: WINDOWS Score: 100 23 checkip.us-east-1.prod.check-ip.aws.a2z.com 2->23 25 checkip.check-ip.aws.a2z.com 2->25 27 checkip.amazonaws.com 2->27 43 Found malware configuration 2->43 45 Malicious sample detected (through community Yara rule) 2->45 47 Yara detected GuLoader 2->47 49 5 other signatures 2->49 9 CV.exe 2->9         started        signatures3 process4 signatures5 59 Detected unpacking (changes PE section rights) 9->59 61 Detected unpacking (overwrites its own PE header) 9->61 63 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 9->63 65 4 other signatures 9->65 12 CV.exe 1 9->12         started        process6 signatures7 67 Tries to detect Any.run 12->67 69 Hides threads from debuggers 12->69 15 CV.exe 6 12->15         started        process8 dnsIp9 33 googlehosted.l.googleusercontent.com 172.217.168.1, 443, 49747 GOOGLEUS United States 15->33 35 doc-0c-3k-docs.googleusercontent.com 15->35 37 Tries to detect Any.run 15->37 39 Maps a DLL or memory area into another process 15->39 41 Hides threads from debuggers 15->41 19 CV.exe 16 15->19         started        signatures10 process11 dnsIp12 29 enmark.com.my 110.4.45.145, 49759, 49769, 587 EXABYTES-AS-APExaBytesNetworkSdnBhdMY Malaysia 19->29 31 mail.enmark.com.my 19->31 51 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 19->51 53 Tries to steal Mail credentials (via file access) 19->53 55 Tries to harvest and steal ftp login credentials 19->55 57 Tries to harvest and steal browser information (history, passwords, etc) 19->57 signatures13
Detection:
guloader
Create hunting rule
Link:
https://mwdb.cert.pl/sample/4f8130693067523c153d09b000e48e744ca3b86388221a840349746ea6e561df/
Threat name:
Win32.Backdoor.Androm
Create hunting rule
Status:
Malicious
First seen:
2020-08-11 10:57:06 UTC
AV detection:
19 of 48 (39.58%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=j6ata2jqm5jdyfj5bgyabzeoorgkhoddrarbvbadjf2g5jxfmhpq._file
Verdict:
malicious
Label(s):
agenttesla
Create hunting rule
hawkeyekeylogger
Create hunting rule
guloader
Create hunting rule
Similar samples:
0548e8d5359f46894fe4872bbba30cc48775d5fb909eba94e3534c8b018976af
GuLoader
2bb3ec5f6e8830a1b8e87a95bcb53406688386e7dd33149bb8117318f28faba9
GuLoader
554da92aa0dff594ff82094b0a8e8125419723e8899c670f7b8d74daf0580880
GuLoader
57d8c785d274b5dad9441ec2211c49ef5fd5abef5ebb5275f9dd6b8e8ecfff21
GuLoader
7c15dd07b223275e68dd8034583f12a73fc19f2d42abede56ed8d0dfdc92edc6
GuLoader
855a18ddf75958630f30453aaa7fb00163c2aa3c1ca2dd8b888240af48e9b8e4
GuLoader
9d8ea8f49ab8d7cec94437483559937a79d6a4ce43273dd41e913c3d7d7f69c8
GuLoader
a3cae0aae6bb5a0d6b4710e161925a315fd3ef4a5bfef88eea9fee94b35874d4
GuLoader
a9abad7f4aace35de5651f437a83f47787606345d04ea63426db6a7a9b02ba5e
GuLoader
b1667a4eee2a104e32fd9071a6de2ee27634d2e181350b329d58f54b12bd2931
GuLoader
+ 11'754 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  5/10
Tags:
n/a
Link:
https://tria.ge/reports/200811-tqhbw6a95a/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
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/4f8130693067523c153d09b000e48e744ca3b86388221a840349746ea6e561df

File information

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

Malspam

GuLoader

iso 5c2823e09b5987a9a9fe486c2afb7cd6c7d56dee36aab42e6f19edda18d2af31

GuLoader

Executable exe 4f8130693067523c153d09b000e48e744ca3b86388221a840349746ea6e561df

(this sample)

  
Dropped by
MD5 6c21f1535499b7ffd74faee319aaeccf
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/43252/
  
Dropped by
SHA256 5c2823e09b5987a9a9fe486c2afb7cd6c7d56dee36aab42e6f19edda18d2af31

Comments