MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 856888dc7dad77cfd55ce59da31a1f2648d6bdb9972183c8233529145d39240f. 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 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 856888dc7dad77cfd55ce59da31a1f2648d6bdb9972183c8233529145d39240f
SHA3-384 hash: 32a0669e0cad55cb84f072e4e4d778964311843e5581f10403240aab83eab4ad1d302c092856f25472266d77767fe197
SHA1 hash: 8f9cdb9f78fe31f72ff01efbbd549a29c4c642f5
MD5 hash: c40baf8d9d47b9c4a2275db7c3e2ab52
humanhash: speaker-kilo-island-indigo
File name:RFQ_0487556789765678.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:913'384 bytes
First seen:2022-07-18 22:38:50 UTC
Last seen:2022-07-19 07:40:14 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 5f0c714c36e6cc016b3a1f4bc86559e4 (199 x GuLoader, 14 x Formbook, 4 x AgentTesla)
ssdeep 24576:G9KQDGLersCUfvmWSH1YvgnMu1xygATZ0wNrcMfcVLCN:eDhABuxHeiT/yTZnZt
Threatray 1'645 similar samples on MalwareBazaar
TLSH T1EA15E133214E204DF91D63348150A6F74765FD27246A8CCF3BA5344AEFB8BD2B938669
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 f0d0b0d8d8b8f0f0 (9 x GuLoader)
Reporter 0xToxin
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:Unperpendicularly Pseudobrotherly
Issuer:Unperpendicularly Pseudobrotherly
Algorithm:sha256WithRSAEncryption
Valid from:2022-02-02T22:17:53Z
Valid to:2025-02-01T22:17:53Z
Serial number: -6f0f0a9d07524e5d
Thumbprint Algorithm:SHA256
Thumbprint: 8c7085c11594d727394ecda16add4b4eeb60e8100be1d131d77f834ed53e913e
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
3
# of downloads :
279
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
RFQ_0487556789765678.rar
Verdict:
Malicious activity
Analysis date:
2022-07-18 19:29:59 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/c14991ec-d9ae-405b-91f2-dcbf63317907

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/291722/
Detection(s):
Win.Trojan.Tedy-9956118-0
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Searching for the window
Creating a window
Creating a file
Creating a file in the %temp% subdirectories
Delayed reading of the file
Sending a custom TCP request
Result
Malware family:
n/a
Score:
  5/10
Tags:
n/a
Link:
https://dragonfly.certego.net/analysis/26686/overview
Behaviour
MalwareBazaar
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
buer overlay packed shell32.dll wacatac
Link:
https://www.filescan.io/uploads/62d5e1118fbcdde3605b6a89/reports/61bd2017-696a-4cd0-be8f-294d9483de81/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/0c6662de-8ce0-4035-babe-e2766b1d546d
Result
Threat name:
AgentTesla, GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.evad.spyw
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1036174
Signature
C2 URLs / IPs found in malware configuration
Multi AV Scanner detection for submitted file
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: 668668 Sample: RFQ_0487556789765678.exe Startdate: 19/07/2022 Architecture: WINDOWS Score: 100 32 mail.hemegas.es 2->32 34 hemegas.es 2->34 36 3 other IPs or domains 2->36 44 Multi AV Scanner detection for submitted file 2->44 46 Yara detected GuLoader 2->46 48 Yara detected AgentTesla 2->48 50 2 other signatures 2->50 8 RFQ_0487556789765678.exe 3 47 2->8         started        signatures3 process4 file5 24 C:\Users\user\Music\...\minidump-analyzer.exe, PE32+ 8->24 dropped 26 C:\Users\user\Music\Amaze\lang-1065.dll, PE32 8->26 dropped 28 C:\Users\user\Music\Amaze\...\AsMultiLang.dll, PE32 8->28 dropped 30 2 other files (none is malicious) 8->30 dropped 52 Writes to foreign memory regions 8->52 54 Tries to detect Any.run 8->54 12 CasPol.exe 11 8->12         started        16 CasPol.exe 8->16         started        18 CasPol.exe 8->18         started        20 CasPol.exe 8->20         started        signatures6 process7 dnsIp8 38 hemegas.es 37.59.226.102, 49747, 587 OVHFR France 12->38 40 drive.google.com 142.250.185.206, 443, 49744 GOOGLEUS United States 12->40 42 googlehosted.l.googleusercontent.com 142.250.186.161, 443, 49745 GOOGLEUS United States 12->42 56 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 12->56 58 Tries to steal Mail credentials (via file / registry access) 12->58 60 Tries to harvest and steal ftp login credentials 12->60 66 2 other signatures 12->66 22 conhost.exe 12->22         started        62 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 16->62 64 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 16->64 signatures9 process10
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/856888dc7dad77cfd55ce59da31a1f2648d6bdb9972183c8233529145d39240f/
Threat name:
Win32.Trojan.Nemesis
Create hunting rule
Status:
Malicious
First seen:
2022-07-18 15:15:29 UTC
File Type:
PE (Exe)
Extracted files:
55
AV detection:
14 of 26 (53.85%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=qvuirxd5vv347vk44wo2ggq7ezennpnzs4qyhsbdguurixjzeqhq._file
Verdict:
malicious
Label(s):
cloudeye
Create hunting rule
Similar samples:
2d877ed3177f6917741d1387fe8cae644c582c0eacf8bdd54fc7dd762de40b01
GuLoader
604f01f3ada881bf4c6b91ab8f584ef59d83206ebcf1084b4095bc275bd5d4e5
GuLoader
6444872613ad68fa23cc0a105e3b937cf603e1fbf75350ac5f1d0b2f75166c0f
GuLoader
8775466739105b4c7bf67886f0f7f412ca3ff6272c1f72dda0c8c19da16e684d
GuLoader
9979157caf31a2349ad5512d9aa7e749649232ceb16f9c410655438fa87de552
GuLoader
b8db7c77bddbcd34653bfcb9f74eaef50a4557e2bde18214798a5c2baadedc51
GuLoader
+ 1'635 additional samples on MalwareBazaar
Result
Malware family:
guloader
Create hunting rule
Score:
  10/10
Tags:
family:guloader discovery downloader
Link:
https://tria.ge/reports/220718-2kx8msbea2/
Behaviour
Enumerates physical storage devices
Drops file in Windows directory
Drops file in System32 directory
Checks installed software on the system
Loads dropped DLL
Guloader,Cloudeye
Unpacked files
SH256 hash:
c7a20bcaa0197aedddc8e4797bbb33fdf70d980f5e83c203d148121c2106d917
MD5 hash:
792b6f86e296d3904285b2bf67ccd7e0
SHA1 hash:
966b16f84697552747e0ddd19a4ba8ab5083af31
Link:
https://www.unpac.me/results/2d1d9c45-0c70-481e-ba5f-35a74a24fcc2/
SH256 hash:
856888dc7dad77cfd55ce59da31a1f2648d6bdb9972183c8233529145d39240f
MD5 hash:
c40baf8d9d47b9c4a2275db7c3e2ab52
SHA1 hash:
8f9cdb9f78fe31f72ff01efbbd549a29c4c642f5
Link:
https://www.unpac.me/results/2d1d9c45-0c70-481e-ba5f-35a74a24fcc2/
Malware family:
GuLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/856888dc7dad/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/856888dc7dad77cfd55ce59da31a1f2648d6bdb9972183c8233529145d39240f

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

File information

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

Malspam

GuLoader

rar ff565bf2193182f24787e0ec43aa45042164da105178c00f70a5f4a0d51fa3ea

GuLoader

Executable exe 856888dc7dad77cfd55ce59da31a1f2648d6bdb9972183c8233529145d39240f

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/291722/
  
Dropped by
SHA256 ff565bf2193182f24787e0ec43aa45042164da105178c00f70a5f4a0d51fa3ea
  
Dropped by
MD5 4e23fa79830c853addc3779388375c23

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