MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 043b9efdba993f9894e23a7017e119da44b36341e27eb8b19ed698857ea7325f. 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


CobaltStrike


Vendor detections: 16


Intelligence 16 IOCs YARA 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 043b9efdba993f9894e23a7017e119da44b36341e27eb8b19ed698857ea7325f
SHA3-384 hash: efeb60948a7663a32fd02778117e105ed2fe332352a673081627d390d3902b4103665ee5cec642282bbbea68d4d76f21
SHA1 hash: 7e11bc15426bdc2abbb8c9a7ec96e2105b4247a0
MD5 hash: b956479783cedd1985b816b2b1cd9bd1
humanhash: table-arkansas-equal-triple
File name:back.exe
Download: download sample
Signature CobaltStrike
Create hunting rule
File size:10'060'167 bytes
First seen:2025-01-26 12:02:50 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 72c4e339b7af8ab1ed2eb3821c98713a (50 x BlankGrabber, 26 x PythonStealer, 7 x LunaStealer)
ssdeep 196608:uTo9Yi0HDfMO0QtL2Vmd6+D0JJVAzDaku99beWaXEEfH2CZJjK868:ko9Yi0fr0QtL2Vmd6m0JJVAzDakAP1Ez
TLSH T197A63308BB811EB6E877243EDCA6C112D677B90A1722C9DFC36491220F576E51E36FE1
TrID 70.8% (.CPL) Windows Control Panel Item (generic) (57583/11/19)
12.9% (.EXE) Win64 Executable (generic) (10522/11/4)
6.2% (.EXE) Win16 NE executable (generic) (5038/12/1)
2.5% (.ICL) Windows Icons Library (generic) (2059/9)
2.4% (.EXE) OS/2 Executable (generic) (2029/13)
Magika pebin
File icon (PE):PE icon
dhash icon 4c1070d979b24420 (1 x CobaltStrike)
Reporter kafan_shengui
Tags:CobaltStrike exe

Intelligence

File Origin
# of uploads :
1
# of downloads :
76
Origin country :
US US
Vendor Threat Intelligence
Malware family:
cobaltstrike
Create hunting rule
ID:
1
File name:
back.exe
Verdict:
Malicious activity
Analysis date:
2025-01-26 12:16:43 UTC
Tags:
python pyinstaller cobaltstrike
Link:
https://app.any.run/tasks/728563cf-2c98-4bf9-a90f-ef31d189a6f0

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.FileRepMalware.22561.28030.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=679627aabb54c65453012558
Tags:
cobaltstrike chacha cobalt
Result
Verdict:
Suspicious
Maliciousness:

Behaviour
Creating a file in the %temp% subdirectories
Restart of the analyzed sample
Creating a window
Running batch commands
Creating a process with a hidden window
Connection attempt
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
expand lolbin microsoft_visual_cc overlay packed packed packer_detected
Link:
https://www.filescan.io/uploads/6796247844c1dd69969dbe5c/reports/626fdafd-aa61-4c5a-b420-6ba6472292ad/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/043b9efdba993f9894e23a7017e119da44b36341e27eb8b19ed698857ea7325f
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/5c38af03-2e53-4b5b-8941-67f7a88a09ea
Result
Threat name:
CobaltStrike, Metasploit
Create hunting rule
Detection:
malicious
Classification:
troj
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1599730
Signature
C2 URLs / IPs found in malware configuration
Found malware configuration
Found pyInstaller with non standard icon
Joe Sandbox ML detected suspicious sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Sigma detected: Potentially Suspicious Malware Callback Communication
Uses known network protocols on non-standard ports
Yara detected CobaltStrike
Yara detected Metasploit Payload
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1599730 Sample: back.exe Startdate: 26/01/2025 Architecture: WINDOWS Score: 100 34 Found malware configuration 2->34 36 Malicious sample detected (through community Yara rule) 2->36 38 Multi AV Scanner detection for submitted file 2->38 40 6 other signatures 2->40 8 back.exe 130 2->8         started        process3 file4 22 C:\Users\user\AppData\...\unicodedata.pyd, PE32+ 8->22 dropped 24 C:\Users\user\AppData\Local\...\ucrtbase.dll, PE32+ 8->24 dropped 26 C:\Users\user\AppData\Local\...\select.pyd, PE32+ 8->26 dropped 28 101 other files (none is malicious) 8->28 dropped 42 Found pyInstaller with non standard icon 8->42 12 back.exe 6 8->12         started        signatures5 process6 dnsIp7 32 117.72.104.72, 4443, 49704 CHINANET-BACKBONENo31Jin-rongStreetCN China 12->32 15 WerFault.exe 19 16 12->15         started        18 cmd.exe 1 12->18         started        process8 file9 30 C:\ProgramData\Microsoft\...\Report.wer, Unicode 15->30 dropped 20 conhost.exe 18->20         started        process10
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/043b9efdba993f9894e23a7017e119da44b36341e27eb8b19ed698857ea7325f
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/043b9efdba993f9894e23a7017e119da44b36341e27eb8b19ed698857ea7325f/
Threat name:
Win64.Backdoor.Cobeacon
Create hunting rule
Status:
Malicious
First seen:
2025-01-26 12:03:07 UTC
File Type:
PE+ (Exe)
Extracted files:
852
AV detection:
14 of 24 (58.33%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=aq5z57n2te7zrfhchjybpyiz3jclgy2b4j7lrmm622mik7vhgjpq._file
Result
Malware family:
cobaltstrike
Create hunting rule
Score:
  10/10
Tags:
family:cobaltstrike backdoor pyinstaller trojan
Link:
https://tria.ge/reports/250126-n71qds1kcy/
Behaviour
Suspicious use of WriteProcessMemory
Loads dropped DLL
Cobaltstrike
Cobaltstrike family
Malware Config
C2 Extraction:
http://117.72.104.72:4443/bSEc
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/93338602-f7a5-4527-8ad9-53542365569f
Unpacked files
SH256 hash:
9c0a0a11629cced6a064932e95a0158ee936739d75a56338702fed97cb0bad55
MD5 hash:
ab01c808bed8164133e5279595437d3d
SHA1 hash:
0f512756a8db22576ec2e20cf0cafec7786fb12b
Link:
https://www.unpac.me/results/7124fe64-1e76-46e8-932c-9afe9ed4067a/
SH256 hash:
043b9efdba993f9894e23a7017e119da44b36341e27eb8b19ed698857ea7325f
MD5 hash:
b956479783cedd1985b816b2b1cd9bd1
SHA1 hash:
7e11bc15426bdc2abbb8c9a7ec96e2105b4247a0
Link:
https://www.unpac.me/results/7124fe64-1e76-46e8-932c-9afe9ed4067a/
Malware family:
Metasploit
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/043b9efdba99/report/overview.html
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/043b9efdba993f9894e23a7017e119da44b36341e27eb8b19ed698857ea7325f

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:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerException__SetConsoleCtrl
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:PyInstaller
Create hunting rule
Author:@bartblaze
Description:Identifies executable converted using PyInstaller. This rule by itself does NOT necessarily mean the detected file is malicious.
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)
Rule name:upxHook
Create hunting rule
Author:@r3dbU7z
Description:Detect artifacts from 'upxHook' - modification of UPX packer
Reference:https://bazaar.abuse.ch/sample/6352be8aa5d8063673aa428c3807228c40505004320232a23d99ebd9ef48478a/

File information

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

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 (FORCE_INTEGRITY)high
Reviews
IDCapabilitiesEvidence
AUTH_APIManipulates User AuthorizationADVAPI32.dll::ConvertSidToStringSidW
ADVAPI32.dll::ConvertStringSecurityDescriptorToSecurityDescriptorW
SECURITY_BASE_APIUses Security Base APIADVAPI32.dll::GetTokenInformation
WIN32_PROCESS_APICan Create Process and ThreadsKERNEL32.dll::CreateProcessW
ADVAPI32.dll::OpenProcessToken
KERNEL32.dll::CloseHandle
WIN_BASE_APIUses Win Base APIKERNEL32.dll::TerminateProcess
KERNEL32.dll::LoadLibraryExW
KERNEL32.dll::GetDriveTypeW
KERNEL32.dll::GetStartupInfoW
KERNEL32.dll::GetCommandLineW
KERNEL32.dll::GetCommandLineA
WIN_BASE_EXEC_APICan Execute other programsKERNEL32.dll::WriteConsoleW
KERNEL32.dll::ReadConsoleW
KERNEL32.dll::SetConsoleCtrlHandler
KERNEL32.dll::SetStdHandle
KERNEL32.dll::GetConsoleMode
KERNEL32.dll::GetConsoleOutputCP
WIN_BASE_IO_APICan Create FilesKERNEL32.dll::CreateDirectoryW
KERNEL32.dll::CreateFileW
KERNEL32.dll::DeleteFileW
KERNEL32.dll::FindFirstFileW
KERNEL32.dll::RemoveDirectoryW
KERNEL32.dll::SetDllDirectoryW
WIN_USER_APIPerforms GUI ActionsUSER32.dll::PeekMessageW
USER32.dll::CreateWindowExW

Comments