MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4c920639c2d1ee9383050ecd1248d8877f5d2ae425d293ad13ddb81506c4cb22. 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 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4c920639c2d1ee9383050ecd1248d8877f5d2ae425d293ad13ddb81506c4cb22
SHA3-384 hash: 4789db91b3a6f9662d8cd889a6e844979846c3b7129094ce19527f20a8f2041efe57c0ac963f627636a24a44bd24791b
SHA1 hash: defa5d937b13441af30f46f022086f8077d038d0
MD5 hash: 7fdba574771de04bb6cdfb936ec21d63
humanhash: mobile-equal-charlie-fix
File name:BIG.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:411'289 bytes
First seen:2022-10-11 13:20:21 UTC
Last seen:2022-10-18 07:26:05 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 24f4223e271413c25abad52fd456a9bc (21 x GuLoader, 15 x Loki, 10 x AgentTesla)
ssdeep 6144:QQA4cQr/lIKrOzlAnxhRVWM2W0Dwl7cxDq9JrIxE9w/c9r2tLgVEQo6T:hIKcyzRMTwSDq9aT/c12lgVPf
TLSH T1549402223581D60FD97057357D33DC954962BC68B8B0A2EF32D0772E7E37A539A19382
TrID 48.8% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
16.4% (.EXE) Win64 Executable (generic) (10523/12/4)
10.2% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
7.8% (.EXE) Win16 NE executable (generic) (5038/12/1)
7.0% (.EXE) Win32 Executable (generic) (4505/5/1)
File icon (PE):PE icon
dhash icon 1c7cccccd48ee0e0 (1 x GuLoader)
Reporter malwarelabnet
Tags:exe GuLoader

Intelligence

File Origin
# of uploads :
2
# of downloads :
341
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/318961/
Detection(s):
SecuriteInfo.com.Mal.Generic_S.2588.27690.UNOFFICIAL
Create hunting rule

Result
Verdict:
Suspicious
Maliciousness:

Behaviour
Searching for the window
Creating a file in the %temp% directory
Creating a window
Creating a file
Searching for the Windows task manager window
Running batch commands
Creating a process with a hidden window
Delayed reading of the file
Result
Malware family:
n/a
Score:
  5/10
Tags:
n/a
Link:
https://dragonfly.certego.net/analysis/42509/overview
Behaviour
MalwareBazaar
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
overlay packed shell32.dll
Link:
https://www.filescan.io/uploads/63456dc0f2794c622d2893b6/reports/812fc47e-9b58-4786-b1d0-272da0605fcc/overview
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/03bb54ac-a2d6-4617-80f4-26fe77c5a126
Result
Threat name:
AgentTesla, GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.evad.spyw
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1088045
Signature
Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
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 harvest and steal ftp login credentials
Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Writes to foreign memory regions
Yara detected AgentTesla
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 720637 Sample: BIG.exe Startdate: 11/10/2022 Architecture: WINDOWS Score: 100 28 mail.jnarora.com 2->28 30 googlehosted.l.googleusercontent.com 2->30 32 2 other IPs or domains 2->32 40 Yara detected GuLoader 2->40 42 Yara detected AgentTesla 2->42 44 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 2->44 8 BIG.exe 4 50 2->8         started        signatures3 process4 file5 22 C:\Users\user\Itonidid\...\Revets.Rnn, data 8->22 dropped 24 C:\Users\user\AppData\Local\...\nsExec.dll, PE32 8->24 dropped 26 C:\Users\user\AppData\Local\...\System.dll, PE32 8->26 dropped 46 Writes to foreign memory regions 8->46 48 Tries to detect Any.run 8->48 12 CasPol.exe 11 8->12         started        16 cmd.exe 1 8->16         started        signatures6 process7 dnsIp8 34 mail.jnarora.com 103.72.76.109, 49820, 587 TOMATOWEB-BDTomatoWebPvtLimitedBD Bangladesh 12->34 36 drive.google.com 142.250.184.238, 443, 49818 GOOGLEUS United States 12->36 38 googlehosted.l.googleusercontent.com 172.217.18.97, 443, 49819 GOOGLEUS United States 12->38 50 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 12->50 52 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 12->52 54 Tries to steal Mail credentials (via file / registry access) 12->54 56 4 other signatures 12->56 18 conhost.exe 12->18         started        20 conhost.exe 16->20         started        signatures9 process10
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4c920639c2d1ee9383050ecd1248d8877f5d2ae425d293ad13ddb81506c4cb22/
Threat name:
Win32.Trojan.GuLoader
Create hunting rule
Status:
Malicious
First seen:
2022-10-11 09:55:22 UTC
File Type:
PE (Exe)
Extracted files:
20
AV detection:
18 of 26 (69.23%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=jsjamooc2hxjhayfb3gresgyq57v2kxeexjjhlit3w4bkbwezmra._file
Verdict:
malicious
Label(s):
cloudeye
Create hunting rule
Result
Malware family:
guloader
Create hunting rule
Score:
  10/10
Tags:
family:guloader downloader
Link:
https://tria.ge/reports/221011-qlm9aafef7/
Behaviour
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Drops file in Windows directory
Loads dropped DLL
Guloader,Cloudeye
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/830cc28d-4073-4876-bf75-2ddc510b306d
Unpacked files
SH256 hash:
1f18f4126124b0551f3dbcd0fec7f34026f930ca509f04435657cedc32ae8c47
MD5 hash:
f27689c513e7d12c7c974d5f8ef710d6
SHA1 hash:
e305f2a2898d765a64c82c449dfb528665b4a892
Link:
https://www.unpac.me/results/f5f1ea02-0ced-4688-98f3-7888d642a643/
SH256 hash:
6950991102462d84fdc0e3b0ae30c95af8c192f77ce3d78e8d54e6b22f7c09ba
MD5 hash:
8cf2ac271d7679b1d68eefc1ae0c5618
SHA1 hash:
7cc1caaa747ee16dc894a600a4256f64fa65a9b8
Link:
https://www.unpac.me/results/f5f1ea02-0ced-4688-98f3-7888d642a643/
SH256 hash:
f344713a08459675b6db6fc79e93f7813d8793af6fd9a2c8c64aa1a0a0e0d218
MD5 hash:
d53c32cedd3d4c37d0a35183ec531ed9
SHA1 hash:
1184372024a780df8234ac67c4a5db4d303adbc5
Link:
https://www.unpac.me/results/f5f1ea02-0ced-4688-98f3-7888d642a643/
SH256 hash:
4c920639c2d1ee9383050ecd1248d8877f5d2ae425d293ad13ddb81506c4cb22
MD5 hash:
7fdba574771de04bb6cdfb936ec21d63
SHA1 hash:
defa5d937b13441af30f46f022086f8077d038d0
Link:
https://www.unpac.me/results/f5f1ea02-0ced-4688-98f3-7888d642a643/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Legit
Score:
0.28
Link:
https://yomi.yoroi.company/submissions/4c920639c2d1ee9383050ecd1248d8877f5d2ae425d293ad13ddb81506c4cb22

File information

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

Cape
Cape
https://www.capesandbox.com/analysis/318961/

Comments