MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 45f95bbef93ab991d75e1b9a8b12a76bc806deb513071e98df321897dbe93a8a. 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


Cobalt Strike


Vendor detections: 13


Intelligence 13 IOCs YARA 8 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 45f95bbef93ab991d75e1b9a8b12a76bc806deb513071e98df321897dbe93a8a
SHA3-384 hash: 9e3d1c90e6049a9d4318596e128e16633b776747cca70a69ce9c8f003fe1abadc61d650f3b56d6f288b5c3f9874631c1
SHA1 hash: 91007b3bd2be0881ce91fb20121144a42f916ffe
MD5 hash: 19e1dc05bca07626d2a0a92458c2ca72
humanhash: potato-high-earth-timing
File name:BUILD.exe
Download: download sample
Signature Cobalt Strike
Create hunting rule
File size:28'160 bytes
First seen:2025-03-05 15:43:26 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 381caeade95277bd3814b1e36dc34610 (1 x Cobalt Strike)
ssdeep 384:u79tSLOsGrRT74iBbnnDkqr50OkavIOzZADkwp8:u5tbs6VBbngqtoDkk8
TLSH T159C2A146E792DEFCDE2980FEC0E26432E6617E800366A4DB53E5675C29E43E17738643
TrID 63.5% (.EXE) Win64 Executable (generic) (10522/11/4)
12.2% (.EXE) OS/2 Executable (generic) (2029/13)
12.0% (.EXE) Generic Win/DOS Executable (2002/3)
12.0% (.EXE) DOS Executable Generic (2000/1)
Magika pebin
Reporter Fadouse
Tags:Cobalt Strike exe


Avatar
Fadouse
Test sample
injection via APC

Intelligence

File Origin
# of uploads :
1
# of downloads :
741
Origin country :
HK HK
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
BUILD.exe
Verdict:
No threats detected
Analysis date:
2025-03-05 15:45:59 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/3536056d-64c5-4bb7-a6d9-b0cf5a59787d

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67c87291c8d04e92a4bf20af
Tags:
cobaltstrike cobalt
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for synchronization primitives
Launching the default Windows debugger (dwwin.exe)
Сreating synchronization primitives
Launching a process
Creating a file in the %temp% directory
Running batch commands
Searching for the window
Connection attempt
Unauthorized injection to a system process
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
anti-debug anti-vm evasive explorer fingerprint lolbin microsoft_visual_cc obfuscated remote
Link:
https://www.filescan.io/uploads/67c8714de95d0f9029e467dc/reports/73007cb8-59a9-475d-a216-300407582b46/overview
Verdict:
Malicious
Labled as:
Win64/Kryptik_AGeneric.MR trojan
Link:
https://www.hybrid-analysis.com/sample/45f95bbef93ab991d75e1b9a8b12a76bc806deb513071e98df321897dbe93a8a
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/e5e6a74a-d55d-4b18-8e8e-aa1d61f6c790
Result
Threat name:
CobaltStrike, Metasploit
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1630213
Signature
Allocates memory in foreign processes
C2 URLs / IPs found in malware configuration
Early bird code injection technique detected
Found direct / indirect Syscall (likely to bypass EDR)
Found malware configuration
Joe Sandbox ML detected suspicious sample
Malicious sample detected (through community Yara rule)
Queues an APC in another process (thread injection)
Tries to detect sandboxes / dynamic malware analysis system (registry check)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Writes to foreign memory regions
Yara detected CobaltStrike
Yara detected Metasploit Payload
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1630213 Sample: BUILD.exe Startdate: 05/03/2025 Architecture: WINDOWS Score: 100 34 Found malware configuration 2->34 36 Malicious sample detected (through community Yara rule) 2->36 38 Yara detected CobaltStrike 2->38 40 4 other signatures 2->40 7 BUILD.exe 2 2->7         started        10 BUILD.exe 1 2->10         started        process3 signatures4 42 Early bird code injection technique detected 7->42 44 Writes to foreign memory regions 7->44 46 Allocates memory in foreign processes 7->46 50 2 other signatures 7->50 12 notepad.exe 6 7->12         started        15 WerFault.exe 21 7->15         started        18 conhost.exe 7->18         started        20 cmd.exe 7->20         started        48 Tries to detect sandboxes / dynamic malware analysis system (registry check) 10->48 22 WerFault.exe 19 16 10->22         started        24 conhost.exe 10->24         started        process5 dnsIp6 32 127.0.0.1 unknown unknown 12->32 26 WerFault.exe 21 12->26         started        28 C:\ProgramData\Microsoft\...\Report.wer, Unicode 15->28 dropped 30 C:\ProgramData\Microsoft\...\Report.wer, Unicode 22->30 dropped file7 process8
Score:
62%
Verdict:
Susipicious
File Type:
PE
Link:
https://malprob.io/report/45f95bbef93ab991d75e1b9a8b12a76bc806deb513071e98df321897dbe93a8a
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/45f95bbef93ab991d75e1b9a8b12a76bc806deb513071e98df321897dbe93a8a/
Threat name:
Win64.Backdoor.Meterpreter
Create hunting rule
Status:
Malicious
First seen:
2025-03-05 15:44:13 UTC
File Type:
PE+ (Exe)
Extracted files:
1
AV detection:
7 of 24 (29.17%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ix4vxpxzhk4zdv26doniwevhnpeanxvvcmdr5gg7gimjpw7jhkfa._file
Verdict:
malicious
Label(s):
metasploit
Create hunting rule
cobaltstrike
Create hunting rule
Similar samples:
error
Cobalt Strike
Result
Malware family:
n/a
Score:
  9/10
Tags:
defense_evasion
Link:
https://tria.ge/reports/250305-s6h66s11h1/
Behaviour
Identifies VirtualBox via ACPI registry values (likely anti-VM)
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/0ed435ed-cb39-423c-bf40-34522d36ad86
Unpacked files
SH256 hash:
45f95bbef93ab991d75e1b9a8b12a76bc806deb513071e98df321897dbe93a8a
MD5 hash:
19e1dc05bca07626d2a0a92458c2ca72
SHA1 hash:
91007b3bd2be0881ce91fb20121144a42f916ffe
Link:
https://www.unpac.me/results/116b2045-9bc0-49a4-a11d-b5cb9c343962/
Malware family:
CobaltStrike
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/45f95bbef93a/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/45f95bbef93ab991d75e1b9a8b12a76bc806deb513071e98df321897dbe93a8a

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:Check_Debugger
Create hunting rule
Rule name:Check_OutputDebugStringA_iat
Create hunting rule
Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__RemoteAPI
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:SUSP_XORed_Mozilla_Oct19
Create hunting rule
Author:Florian Roth
Description:Detects suspicious single byte XORed keyword 'Mozilla/5.0' - it uses yara's XOR modifier and therefore cannot print the XOR key. You can use the CyberChef recipe linked in the reference field to brute force the used key.
Reference:https://gchq.github.io/CyberChef/#recipe=XOR_Brute_Force()
Rule name:SUSP_XORed_Mozilla_RID2DB4
Create hunting rule
Author:Florian Roth
Description:Detects suspicious XORed keyword - Mozilla/5.0
Reference:Internal Research

File information

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

Joe
Joe Sandbox
https://www.joesandbox.com/analysis/1630213

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 (GUARD_CF)high
Reviews
IDCapabilitiesEvidence
SECURITY_BASE_APIUses Security Base APIADVAPI32.dll::AdjustTokenPrivileges
WIN32_PROCESS_APICan Create Process and ThreadsKERNEL32.dll::CreateProcessA
KERNEL32.dll::OpenProcess
ADVAPI32.dll::OpenProcessToken
KERNEL32.dll::CloseHandle
WIN_BASE_APIUses Win Base APIKERNEL32.dll::TerminateProcess
KERNEL32.dll::GetSystemInfo
WIN_BASE_IO_APICan Create FilesKERNEL32.dll::GetTempPathA
WIN_BASE_USER_APIRetrieves Account InformationADVAPI32.dll::LookupPrivilegeValueW
WIN_REG_APICan Manipulate Windows RegistryADVAPI32.dll::RegOpenKeyExA

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