MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 31d9c25d965fa6de72c0c376159c19da21bc5dcd579bc038b2134d19b1ca9ab2. 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 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 31d9c25d965fa6de72c0c376159c19da21bc5dcd579bc038b2134d19b1ca9ab2
SHA3-384 hash: ade9488c4aada54451d25eb0998bff6e661dd2c9d6ef1c66f6a4a6cb55c6e73d90c01ccb8d5fb55b178e546197046cae
SHA1 hash: feb3c0ced829b8ab62d94267f4ec0578ede5e58a
MD5 hash: ae6e5c25ef61b57b0474c12fb74b9880
humanhash: single-fourteen-echo-oranges
File name:Scan AR441 SHEETS.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:494'776 bytes
First seen:2022-11-23 12:53:41 UTC
Last seen:2022-11-23 14:38:03 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash e221f4f7d36469d53810a4b5f9fc8966 (118 x GuLoader, 28 x RemcosRAT, 21 x Formbook)
ssdeep 12288:Wtm2gHDUkrFwT3OSwmucvWwfmRbBT3lhQvaMmgG9l:6gIIFwT3OcucUNwas
TLSH T12CB4E1A07A94D057E5D1F6310AB2DEB9EB78BD106E014B1732E0776EE87F7818E0D50A
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 f070f9a4cce86583 (1 x GuLoader)
Reporter Anonymous
Tags:exe FormBook GuLoader signed

Code Signing Certificate

Organisation:
Issuer:
Algorithm:sha256WithRSAEncryption
Valid from:2022-07-02T14:15:15Z
Valid to:2025-07-01T14:15:15Z
Serial number: -55e503289eafe4ca
Thumbprint Algorithm:SHA256
Thumbprint: ba3ff80eeef1139c441d885c24870652d6c9636c1b6fed276ab6017ffd1c858c
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
2
# of downloads :
367
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
guloader
Create hunting rule
ID:
1
File name:
221119-jz3gssrsvk_pw_infected.zip
Verdict:
Malicious activity
Analysis date:
2022-11-21 07:43:29 UTC
Tags:
guloader
Link:
https://app.any.run/tasks/7d6b1a06-cbb1-4447-a713-9e07e5b92cd6

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/337604/
Detection(s):
SecuriteInfo.com.FileRepMalware.11344.2172.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a file in the %temp% directory
Creating a window
Creating a file
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
overlay packed shell32.dll
Link:
https://www.filescan.io/uploads/637e17ef00c584752ee197cf/reports/268fe66f-dcc8-407b-9b61-3a6d55e62eca/overview
Result
Verdict:
UNKNOWN
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/e6db9ce0-8f63-4a90-92fa-0d31079713f3
Result
Threat name:
FormBook, GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.evad.spyw
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1117862
Signature
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Injects a PE file into a foreign processes
Machine Learning detection for sample
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 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: 750568 Sample: Scan AR441 SHEETS.exe Startdate: 21/11/2022 Architecture: WINDOWS Score: 100 37 www.wooklabel.store 2->37 39 www.potray.info 2->39 41 22 other IPs or domains 2->41 53 Snort IDS alert for network traffic 2->53 55 Multi AV Scanner detection for domain / URL 2->55 57 Malicious sample detected (through community Yara rule) 2->57 59 7 other signatures 2->59 10 Scan AR441 SHEETS.exe 3 33 2->10         started        signatures3 process4 file5 29 C:\Users\user\AppData\...\Plagioclase.Com152, data 10->29 dropped 31 C:\Users\user\AppData\Local\...\System.dll, PE32 10->31 dropped 33 System.Security.Cr...aphy.Primitives.dll, PE32+ 10->33 dropped 35 C:\Users\user\AppData\...\DisplaySwitch.exe, PE32+ 10->35 dropped 71 Tries to detect Any.run 10->71 14 Scan AR441 SHEETS.exe 6 10->14         started        signatures6 process7 dnsIp8 49 googlehosted.l.googleusercontent.com 142.250.186.65, 443, 49808 GOOGLEUS United States 14->49 51 drive.google.com 172.217.23.110, 443, 49807 GOOGLEUS United States 14->51 73 Modifies the context of a thread in another process (thread injection) 14->73 75 Tries to detect Any.run 14->75 77 Maps a DLL or memory area into another process 14->77 79 2 other signatures 14->79 18 RAVCpl64.exe 14->18 injected signatures9 process10 process11 20 cmmon32.exe 13 18->20         started        signatures12 61 Tries to steal Mail credentials (via file / registry access) 20->61 63 Tries to harvest and steal browser information (history, passwords, etc) 20->63 65 Writes to foreign memory regions 20->65 67 3 other signatures 20->67 23 explorer.exe 2 20->23 injected 27 firefox.exe 20->27         started        process13 dnsIp14 43 nedakv.com 162.241.226.133, 49850, 49851, 49852 UNIFIEDLAYER-AS-1US United States 23->43 45 www.club405.social 91.195.240.94, 49877, 49878, 49879 SEDO-ASDE Germany 23->45 47 10 other IPs or domains 23->47 69 System process connects to network (likely due to code injection or exploit) 23->69 signatures15
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/31d9c25d965fa6de72c0c376159c19da21bc5dcd579bc038b2134d19b1ca9ab2/
Threat name:
Win32.Trojan.Guloader
Create hunting rule
Status:
Malicious
First seen:
2022-11-08 11:54:48 UTC
File Type:
PE (Exe)
Extracted files:
57
AV detection:
20 of 26 (76.92%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ghm4exmwl6tn44wayn3blhaz3iq3yxonk6n4aofscngrtmoktkza._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
cloudeye
Create hunting rule
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:pfgc rat spyware stealer trojan
Link:
https://tria.ge/reports/221123-p476qsda48/
Behaviour
Modifies Internet Explorer settings
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
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
Formbook
Unpacked files
SH256 hash:
5a1c20a3e2e2eb182976977669f2c5d9f3104477e98f74d69d2434e79b92fdc3
MD5 hash:
7399323923e3946fe9140132ac388132
SHA1 hash:
728257d06c452449b1241769b459f091aabcffc5
Link:
https://www.unpac.me/results/f5bf6408-a0b3-40bd-ac28-f1d505c6733d/
SH256 hash:
31d9c25d965fa6de72c0c376159c19da21bc5dcd579bc038b2134d19b1ca9ab2
MD5 hash:
ae6e5c25ef61b57b0474c12fb74b9880
SHA1 hash:
feb3c0ced829b8ab62d94267f4ec0578ede5e58a
Link:
https://www.unpac.me/results/f5bf6408-a0b3-40bd-ac28-f1d505c6733d/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Formbook
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/31d9c25d965fa6de72c0c376159c19da21bc5dcd579bc038b2134d19b1ca9ab2

File information

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

Malspam

GuLoader

Executable exe 31d9c25d965fa6de72c0c376159c19da21bc5dcd579bc038b2134d19b1ca9ab2

(this sample)

  
Dropped by
formbook
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/337604/

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