MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a20bdb925e1f673b30da71c943e9dd460ee68e23b44fe00c8a1b09609804f105. 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


Cactus


Vendor detections: 12


Intelligence 12 IOCs YARA 13 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a20bdb925e1f673b30da71c943e9dd460ee68e23b44fe00c8a1b09609804f105
SHA3-384 hash: a57a4bbc85ec8baefdaa90391a3fc86c4214f7f0b1c212a5d9db9753b90f964c5f28e8b37002299a15b6fbca58635bb6
SHA1 hash: 41b53598bfc1bdb21e023b11a49bdab967203681
MD5 hash: 2b986178da0c3d081f99ac8fb4a5952c
humanhash: yellow-india-gee-mockingbird
File name:Gosjeufon.cpl
Download: download sample
Signature Cactus
Create hunting rule
File size:902'856 bytes
First seen:2024-12-19 06:50:27 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 4dbee8fefcf6e06bc57a502d8d28d576 (2 x Cactus)
ssdeep 12288:py9sG8ih195+OeO+OeNhBBhhBBajWhKR81G9banL73KkHgkgrUid4X9FS45+9voL:py9sG8ih1Lmx73KkAY9F/wvoh3Xfyud
TLSH T12A151822718AFCF6C47101B02B7FA7D6932DEC150764C5DBA3C42A69997D1C23E32B99
TrID 40.3% (.EXE) Win64 Executable (generic) (10522/11/4)
19.3% (.EXE) Win16 NE executable (generic) (5038/12/1)
17.2% (.EXE) Win32 Executable (generic) (4504/4/1)
7.7% (.EXE) OS/2 Executable (generic) (2029/13)
7.6% (.EXE) Generic Win/DOS Executable (2002/3)
Magika pebin
File icon (PE):PE icon
dhash icon f0968ee8aae8e8b2 (9 x Urelas, 5 x HermeticWiper, 4 x Starcat)
Reporter abuse_ch
Tags:Cactus cpl exe Ransomware

Intelligence

File Origin
# of uploads :
1
# of downloads :
674
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Gosjeufon.cpl
Verdict:
Malicious activity
Analysis date:
2024-12-19 06:54:45 UTC
Tags:
ransomware stealer
Link:
https://app.any.run/tasks/61beb52c-eefb-48dc-9fcb-9de9f939e58a

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Trojan.Encoder.41360.14677.3687.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
94.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6763c2598fb73f13afd18b5c
Tags:
ransomware crypt sage
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Searching for synchronization primitives
Launching the default Windows debugger (dwwin.exe)
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
cmd evasive fingerprint hacktool lolbin masquerade microsoft_visual_cc
Link:
https://www.filescan.io/uploads/6763c25621bbe1761ca69477/reports/bcebc0be-ba7d-4ef0-ba30-73a784ab68c1/overview
Verdict:
Malicious
Labled as:
Zusy.Generic
Link:
https://www.hybrid-analysis.com/sample/a20bdb925e1f673b30da71c943e9dd460ee68e23b44fe00c8a1b09609804f105
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:
Suspicious
Link:
https://analyze.intezer.com/analyses/76f486d3-0f09-4904-b5a3-6e08ee00fc44
Result
Threat name:
n/a
Detection:
malicious
Classification:
rans.phis.troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1578029
Signature
AI detected suspicious sample
Deletes shadow drive data (may be related to ransomware)
May encrypt documents and pictures (Ransomware)
Modifies existing user documents (likely ransomware behavior)
Multi AV Scanner detection for submitted file
Overwrites Mozilla Firefox settings
Self deletion via cmd or bat file
Sigma detected: Delete shadow copy via WMIC
Sigma detected: Shadow Copies Deletion Using Operating Systems Utilities
Sigma detected: Suspicious Ping/Del Command Combination
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)
Uses ping.exe to check the status of other devices and networks
Uses ping.exe to sleep
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1578029 Sample: Gosjeufon.cpl.exe Startdate: 19/12/2024 Architecture: WINDOWS Score: 100 66 Multi AV Scanner detection for submitted file 2->66 68 Sigma detected: Delete shadow copy via WMIC 2->68 70 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 2->70 72 3 other signatures 2->72 7 Gosjeufon.cpl.exe 4 1001 2->7         started        11 Gosjeufon.cpl.exe 658 2->11         started        13 Gosjeufon.cpl.exe 2->13         started        15 notepad.exe 2->15         started        process3 file4 54 C:\Users\user\Desktop\...\ZIPXYXWIOY.png, data 7->54 dropped 56 C:\Users\user\DesktopOWRVPQCCS.png, data 7->56 dropped 58 C:\Users\user\DesktopIVQSAOTAQ.jpg, data 7->58 dropped 60 105 other files (103 malicious) 7->60 dropped 74 Self deletion via cmd or bat file 7->74 76 Deletes shadow drive data (may be related to ransomware) 7->76 78 May encrypt documents and pictures (Ransomware) 7->78 80 3 other signatures 7->80 17 cmd.exe 7->17         started        20 WMIC.exe 1 7->20         started        22 WMIC.exe 7->22         started        24 cmd.exe 11->24         started        26 WMIC.exe 1 11->26         started        28 WMIC.exe 11->28         started        30 cmd.exe 13->30         started        32 WMIC.exe 13->32         started        34 WMIC.exe 13->34         started        signatures5 process6 signatures7 48 2 other processes 17->48 36 conhost.exe 20->36         started        38 conhost.exe 22->38         started        62 Uses ping.exe to sleep 24->62 64 Uses ping.exe to check the status of other devices and networks 24->64 50 2 other processes 24->50 40 conhost.exe 26->40         started        42 conhost.exe 28->42         started        52 2 other processes 30->52 44 conhost.exe 32->44         started        46 conhost.exe 34->46         started        process8
Score:
98%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/a20bdb925e1f673b30da71c943e9dd460ee68e23b44fe00c8a1b09609804f105
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a20bdb925e1f673b30da71c943e9dd460ee68e23b44fe00c8a1b09609804f105/
Threat name:
Win32.Trojan.Nekark
Create hunting rule
Status:
Malicious
First seen:
2024-12-19 06:51:04 UTC
File Type:
PE (Exe)
Extracted files:
33
AV detection:
20 of 23 (86.96%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=uif5xes6d5ttwmg2oheuh2o5iyhondrdwrh6adekdmewbgae6ecq._file
Result
Malware family:
n/a
Score:
  10/10
Tags:
credential_access defense_evasion discovery execution impact persistence ransomware spyware stealer
Link:
https://tria.ge/reports/241219-hmgh5atqdn/
Behaviour
Runs ping.exe
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Uses Volume Shadow Copy service COM API
System Location Discovery: System Language Discovery
System Network Configuration Discovery: Internet Connection Discovery
Adds Run key to start application
Drops desktop.ini file(s)
Credentials from Password Stores: Windows Credential Manager
Deletes itself
Drops startup file
Reads user/profile data of web browsers
Deletes shadow copies
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/26eea907-3d58-4fd3-9527-81326e9f60aa
Unpacked files
SH256 hash:
a20bdb925e1f673b30da71c943e9dd460ee68e23b44fe00c8a1b09609804f105
MD5 hash:
2b986178da0c3d081f99ac8fb4a5952c
SHA1 hash:
41b53598bfc1bdb21e023b11a49bdab967203681
Link:
https://www.unpac.me/results/426f999b-5405-4c65-ab4e-45874b3265ea/
Please note that we are no longer able to provide a coverage score for Virus Total.

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:cobalt_strike_tmp01925d3f
Create hunting rule
Author:The DFIR Report
Description:files - file ~tmp01925d3f.exe
Reference:https://thedfirreport.com
Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:pe_detect_tls_callbacks
Create hunting rule
Rule name:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:RansomPyShield_Antiransomware
Create hunting rule
Author:XiAnzheng
Description:Check for Suspicious String and Import combination that Ransomware mostly abuse(can create FP)
Rule name:RANSOMWARE
Create hunting rule
Author:ToroGuitar
Rule name:RIPEMD160_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:SHA1_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA1 constants
Rule name:SHA512_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA384/SHA512 constants
Rule name:Sus_Obf_Enc_Spoof_Hide_PE
Create hunting rule
Author:XiAnzheng
Description:Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP)

File information

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

Web download

Cactus

Executable exe a20bdb925e1f673b30da71c943e9dd460ee68e23b44fe00c8a1b09609804f105

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3350199/
  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/3349061/

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings
IDTitleSeverity
CHECK_AUTHENTICODEMissing Authenticodehigh
CHECK_DLL_CHARACTERISTICSMissing dll Security Characteristics (HIGH_ENTROPY_VA)high
Reviews
IDCapabilitiesEvidence
SECURITY_BASE_APIUses Security Base APIADVAPI32.dll::AdjustTokenPrivileges
WIN32_PROCESS_APICan Create Process and ThreadsKERNEL32.dll::CreateProcessW
KERNEL32.dll::OpenProcess
ADVAPI32.dll::OpenProcessToken
KERNEL32.dll::CloseHandle
KERNEL32.dll::CreateThread
WIN_BASE_APIUses Win Base APIKERNEL32.dll::TerminateProcess
KERNEL32.dll::LoadLibraryExW
KERNEL32.dll::GetStartupInfoW
KERNEL32.dll::GetCommandLineA
KERNEL32.dll::GetCommandLineW
WIN_BASE_EXEC_APICan Execute other programsKERNEL32.dll::WriteConsoleW
KERNEL32.dll::ReadConsoleW
KERNEL32.dll::SetStdHandle
KERNEL32.dll::GetConsoleCP
KERNEL32.dll::GetConsoleMode
WIN_BASE_IO_APICan Create FilesKERNEL32.dll::CopyFileA
KERNEL32.dll::CreateFileW
KERNEL32.dll::DeleteFileW
KERNEL32.dll::MoveFileExW
KERNEL32.dll::FindFirstFileW
KERNEL32.dll::GetTempPathA
WIN_BASE_USER_APIRetrieves Account InformationADVAPI32.dll::LookupPrivilegeValueW
WIN_BCRYPT_APICan Encrypt Filesbcrypt.dll::BCryptGenRandom
bcrypt.dll::BCryptOpenAlgorithmProvider
bcrypt.dll::BCryptCloseAlgorithmProvider
WIN_REG_APICan Manipulate Windows RegistryADVAPI32.dll::RegCreateKeyExW
ADVAPI32.dll::RegCreateKeyW
ADVAPI32.dll::RegGetValueA
ADVAPI32.dll::RegOpenKeyExW
ADVAPI32.dll::RegQueryValueExW
ADVAPI32.dll::RegSetValueExW

Comments