MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a2da5a91a929dc26e83ca3127fd74fba05929a6e8804a0827d6f4355914cde66. 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: 15


Intelligence 15 IOCs YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a2da5a91a929dc26e83ca3127fd74fba05929a6e8804a0827d6f4355914cde66
SHA3-384 hash: 6849fb13383214b091549a9fa59544eeab56dfa8e0df338e04cc0b4e846653aeccf9cbc9609d44ca416587611bc9b6e3
SHA1 hash: 22142b34da08e52b7057e0c91a9f8a7539effc01
MD5 hash: 737e973a4885c08941c1793a40eec035
humanhash: sixteen-east-sodium-idaho
File name:a2da5a91a929dc26e83ca3127fd74fba05929a6e8804a0827d6f4355914cde66.exe
Download: download sample
Signature CobaltStrike
Create hunting rule
File size:17'920 bytes
First seen:2024-07-24 19:50:13 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 17b461a082950fc6332228572138b80c (121 x CobaltStrike, 2 x Cobalt Strike)
ssdeep 192:vDMAe4Ckj19RZZ6wpSfu1bKcq5uHj7khBDSeKNH4T0M1s7BUbOj6kxiY:vDMAoKz6WtKEj7aBDiK0Ys7bAY
TLSH T1DE821A7FB64228E9C127D17CC9EA6771ADF27123016B271F2FB8C6302F21969497D909
TrID 41.1% (.EXE) Microsoft Visual C++ compiled executable (generic) (16529/12/5)
26.1% (.EXE) Win64 Executable (generic) (10523/12/4)
12.5% (.EXE) Win16 NE executable (generic) (5038/12/1)
5.1% (.ICL) Windows Icons Library (generic) (2059/9)
5.0% (.EXE) OS/2 Executable (generic) (2029/13)
Reporter Anonymous
Tags:CobaltStrike exe


Avatar
Anonymous
this malware sample is very nasty!

Intelligence

File Origin
# of uploads :
1
# of downloads :
329
Origin country :
CN CN
Vendor Threat Intelligence
Detection(s):
Win.Trojan.CobaltStrike-9044898-1
Create hunting rule

Win.Trojan.CobaltStrike-7899871-1
Create hunting rule

Win.Countermeasure.LoaderWinGeneric-9804845-2
Create hunting rule

Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=66a15b2ccb3d02fa0e4958c4
Tags:
Infostealer Cobaltstrike
Result
Verdict:
Malware
Maliciousness:

Behaviour
Connection attempt
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-debug cobalt cobaltstrike config-extracted mingw shelma
Link:
https://www.filescan.io/uploads/66a15b80dfa8b2fced4e2071/reports/b5e95766-ea95-42f4-aa26-e37409ae7fa2/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:
Suspicious
Link:
https://analyze.intezer.com/analyses/24d30120-03a4-4492-8ee0-e2473a47ec3f
Result
Threat name:
CobaltStrike, Metasploit
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1480665
Signature
AI detected suspicious sample
Antivirus / Scanner detection for submitted sample
C2 URLs / IPs found in malware configuration
Found API chain indicative of debugger detection
Found malware configuration
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Uses known network protocols on non-standard ports
Yara detected CobaltStrike
Yara detected Metasploit Payload
Behaviour
Behavior Graph:
Download SVG
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/a2da5a91a929dc26e83ca3127fd74fba05929a6e8804a0827d6f4355914cde66
Detection:
cobaltstrike
Create hunting rule
Link:
https://mwdb.cert.pl/sample/a2da5a91a929dc26e83ca3127fd74fba05929a6e8804a0827d6f4355914cde66/
Threat name:
Win64.Backdoor.Cobeacon
Create hunting rule
Status:
Malicious
First seen:
2024-04-05 19:52:31 UTC
File Type:
PE+ (Exe)
AV detection:
34 of 38 (89.47%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ulnfvenjfhocn2b4umjh7v2pxiczfgtorackbat5n5bvlekm3zta._file
Verdict:
malicious
Label(s):
cobaltstrike
Create hunting rule
Result
Malware family:
cobaltstrike
Create hunting rule
Score:
  10/10
Tags:
family:cobaltstrike backdoor trojan
Link:
https://tria.ge/reports/240724-yktzfaxbke/
Behaviour
Cobaltstrike
Malware Config
C2 Extraction:
http://192.168.52.128:8082/2aTv
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/08dcffee-199c-45f5-8b17-f35b234c54d2
Unpacked files
SH256 hash:
a2da5a91a929dc26e83ca3127fd74fba05929a6e8804a0827d6f4355914cde66
MD5 hash:
737e973a4885c08941c1793a40eec035
SHA1 hash:
22142b34da08e52b7057e0c91a9f8a7539effc01
Detections:
HKTL_Imphashes_Aug22_1
Create hunting rule
hacktool_windows_cobaltstrike_artifact_exe
Create hunting rule
CobaltStrike_Resources_Artifact64_v3_14_to_v4_x
Create hunting rule
CobaltStrike_Resources_Artifact64_v3_14_to_v4_x
Create hunting rule
Link:
https://www.unpac.me/results/690cc34c-600f-4aca-bc3d-39ff8a626c37/
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/a2da5a91a929dc26e83ca3127fd74fba05929a6e8804a0827d6f4355914cde66

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:CobaltStrike_Resources_Artifact64_v3_14_to_v4_x
Create hunting rule
Author:gssincla@google.com
Description:Cobalt Strike's resources/artifact64{.exe,.dll,svc.exe,svcbig.exe,big.exe,big.dll,.x64.dll,big.x64.dll} and resource/artifactuac(alt)64.exe signature for versions v3.14 through v4.x
Reference:https://cloud.google.com/blog/products/identity-security/making-cobalt-strike-harder-for-threat-actors-to-abuse
Rule name:CobaltStrike__Resources_Artifact64_v3_14_to_v4_x
Create hunting rule
Author:gssincla@google.com
Rule name:HKTL_Imphashes_Aug22_1
Create hunting rule
Author:Florian Roth
Description:Detects different hacktools based on their imphash
Reference:Internal Research
Rule name:Windows_Trojan_CobaltStrike_7f8da98a
Create hunting rule
Author:Elastic Security
Rule name:win_cobaltstrike_pipe_strings_nov_2023
Create hunting rule
Author:Matthew @ Embee_Research
Description:Detects default strings related to cobalt strike named pipes

File information

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

Malspam

CobaltStrike

Executable exe a2da5a91a929dc26e83ca3127fd74fba05929a6e8804a0827d6f4355914cde66

(this sample)

  
Link
https://bbs.kafan.cn/forum-31-1.html
  
Delivery method
Distributed via e-mail attachment

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_NXMissing Non-Executable Memory Protectioncritical
CHECK_PIEMissing Position-Independent Executable (PIE) Protectionhigh
Reviews
IDCapabilitiesEvidence
WIN32_PROCESS_APICan Create Process and ThreadsKERNEL32.dll::CloseHandle
KERNEL32.dll::CreateThread
WIN_BASE_APIUses Win Base APIKERNEL32.dll::TerminateProcess
KERNEL32.dll::LoadLibraryW
KERNEL32.dll::GetStartupInfoA
WIN_BASE_IO_APICan Create FilesKERNEL32.dll::CreateFileA

Comments