MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 6b3be5de40b3f2d063389b53e5fc63950ee2b9aad46d5ecc1e23c546746952b3. 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: 13


Intelligence 13 IOCs YARA 26 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 6b3be5de40b3f2d063389b53e5fc63950ee2b9aad46d5ecc1e23c546746952b3
SHA3-384 hash: 76925d5c52f48f9195d2c520507347f3d077f48ce32741b1ce939a4dafc40e55906a0426c6da36f8d9fb65bfcff34ee0
SHA1 hash: 52ece5b5aa391c863e93ae4553aa4863260c5d92
MD5 hash: b17d23ea9c0f3e5c97867599a903fbff
humanhash: robert-london-steak-fanta
File name:b17d23ea9c0f3e5c97867599a903fbff.exe
Download: download sample
Signature CobaltStrike
Create hunting rule
File size:238'592 bytes
First seen:2023-07-15 13:19:39 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 6de6115f20bca3362af8264a13983232 (2 x CobaltStrike)
ssdeep 3072:bFzIvEdt1bmmkKKgTVVVDEunfs9ivZ+J97NCqZu0/N1ipwz9xKu:Rzrf1bkgN5sbR8AN1Jpwu
Threatray 158 similar samples on MalwareBazaar
TLSH T1E8345B16B14558F9D85AC1B883565232BA72BC890B31FAFF07E472361D77AE06E3C748
TrID 44.4% (.EXE) Win64 Executable (generic) (10523/12/4)
21.3% (.EXE) Win16 NE executable (generic) (5038/12/1)
8.7% (.ICL) Windows Icons Library (generic) (2059/9)
8.5% (.EXE) OS/2 Executable (generic) (2029/13)
8.4% (.EXE) Generic Win/DOS Executable (2002/3)
Reporter obfusor
Tags:CobaltStrike exe

Intelligence

File Origin
# of uploads :
1
# of downloads :
303
Origin country :
HK HK
Vendor Threat Intelligence
Detection:
CobaltStrikeStager
Create hunting rule
Link:
https://www.capesandbox.com/analysis/420395/
Detection(s):
SecuriteInfo.com.Trojan.Win64.Rozena.1615.14401.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
DNS request
Sending a custom TCP request
Verdict:
No Threat
Threat level:
  10/10
Confidence:
100%
Tags:
anti-debug
Link:
https://www.filescan.io/uploads/64b29d038ca71f19e0889232/reports/2a65ce34-3fc4-484f-86fe-a7f865c18bd5/overview
Verdict:
Malicious
Labled as:
Win64/Rozena.WU trojan
Link:
https://www.hybrid-analysis.com/sample/6b3be5de40b3f2d063389b53e5fc63950ee2b9aad46d5ecc1e23c546746952b3
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/ec700ebd-e78e-47b5-9d77-2390bca85ede
Result
Threat name:
CobaltStrike
Create hunting rule
Detection:
malicious
Classification:
troj
Score:
76 / 100
Link:
https://www.joesandbox.com/analysis/1273577
Signature
C2 URLs / IPs found in malware configuration
Found malware configuration
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Yara detected CobaltStrike
Behaviour
Behavior Graph:
Download SVG
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/6b3be5de40b3f2d063389b53e5fc63950ee2b9aad46d5ecc1e23c546746952b3/
Threat name:
Win64.Trojan.TurtleLoader
Create hunting rule
Status:
Malicious
First seen:
2023-07-15 13:20:07 UTC
File Type:
PE+ (Exe)
AV detection:
17 of 24 (70.83%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=nm56lxsawpznayzytnj6l7ddsuhofonk2rwv5ta6epcum5djkkzq._file
Verdict:
malicious
Label(s):
cobaltstrike
Create hunting rule
Similar samples:
3f1b98bccdfaef50f63b9752a50859e13c84f92821e38b3403399a9b11cbeed2
CobaltStrike
5a268b88ea8b1cad2a07b43e855af3ad4f5e9fb0e1aef21ab4d2a66306c3dca4
CobaltStrike
9955ffce43705c8f12e999a2cc6848db65b1eabe7367350d6959047210ed21e5
CobaltStrike
a4ac7ae499a7d0e74b83983737e372d505ae0eb43578a46930c43024548acafe
CobaltStrike
b5936bb67edde581cbd73771f51c5b7a5304eee82103c02ed6a748d2128f94d1
CobaltStrike
c889866bbe2d83ac73d5ce53acb109c66cf3a84b4e9a7e8086ae257bd275f9b6
CobaltStrike
+ 148 additional samples on MalwareBazaar
Result
Malware family:
cobaltstrike
Create hunting rule
Score:
  10/10
Tags:
family:cobaltstrike botnet:666666 backdoor trojan
Link:
https://tria.ge/reports/230715-qk3ycabf41/
Behaviour
Modifies system certificate store
Cobaltstrike
Malware Config
C2 Extraction:
http://service-4yorw5on-1310046338.bj.apigw.tencentcs.com:443/s
Unpacked files
SH256 hash:
6b3be5de40b3f2d063389b53e5fc63950ee2b9aad46d5ecc1e23c546746952b3
MD5 hash:
b17d23ea9c0f3e5c97867599a903fbff
SHA1 hash:
52ece5b5aa391c863e93ae4553aa4863260c5d92
Link:
https://www.unpac.me/results/4692bd43-155c-4fb1-b803-f3a8c2b96ca1/
Malware family:
CobaltStrike
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/6b3be5de40b3/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/6b3be5de40b3f2d063389b53e5fc63950ee2b9aad46d5ecc1e23c546746952b3

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:CobaltStrikeBeacon
Create hunting rule
Author:ditekshen, enzo & Elastic
Description:Cobalt Strike Beacon Payload
Rule name:CobaltStrike_C2_Encoded_XOR_Config_Indicator
Create hunting rule
Author:yara@s3c.za.net
Description:Detects CobaltStrike C2 encoded profile configuration
Rule name:CobaltStrike_MZ_Launcher
Create hunting rule
Author:yara@s3c.za.net
Description:Detects CobaltStrike MZ header ReflectiveLoader launcher
Rule name:CobaltStrike_Sleep_Decoder_Indicator
Create hunting rule
Author:yara@s3c.za.net
Description:Detects CobaltStrike sleep_mask decoder
Rule name:CobaltStrike_Sleeve_BeaconLoader_VA_x64_o_v4_3_v4_4_v4_5_and_v4_6
Create hunting rule
Author:gssincla@google.com
Description:Cobalt Strike's sleeve/BeaconLoader.VA.x64.o (VirtualAlloc) Versions 4.3 through at least 4.6
Reference:https://cloud.google.com/blog/products/identity-security/making-cobalt-strike-harder-for-threat-actors-to-abuse
Rule name:CobaltStrike_Sleeve_Beacon_x64_v4_5_variant
Create hunting rule
Author:gssincla@google.com
Description:Cobalt Strike's sleeve/beacon.x64.dll Versions 4.5 (variant)
Reference:https://cloud.google.com/blog/products/identity-security/making-cobalt-strike-harder-for-threat-actors-to-abuse
Rule name:CobaltStrike__Sleeve_BeaconLoader_VA_x64_o_v4_3_v4_4_v4_5_and_v4_6
Create hunting rule
Author:gssincla@google.com
Rule name:CobaltStrike__Sleeve_Beacon_x64_v4_5_variant
Create hunting rule
Author:gssincla@google.com
Rule name:HKTL_CobaltStrike_Beacon_4_2_Decrypt
Create hunting rule
Author:Elastic
Description:Identifies deobfuscation routine used in Cobalt Strike Beacon DLL version 4.2
Reference:https://www.elastic.co/blog/detecting-cobalt-strike-with-memory-signatures
Rule name:HKTL_CobaltStrike_Beacon_Strings
Create hunting rule
Author:Elastic
Description:Identifies strings used in Cobalt Strike Beacon DLL
Reference:https://www.elastic.co/blog/detecting-cobalt-strike-with-memory-signatures
Rule name:HKTL_CobaltStrike_SleepMask_Jul22
Create hunting rule
Author:CodeX
Description:Detects static bytes in Cobalt Strike 4.5 sleep mask function that are not obfuscated
Reference:https://codex-7.gitbook.io/codexs-terminal-window/blue-team/detecting-cobalt-strike/sleep-mask-kit-iocs
Rule name:HKTL_Meterpreter_inMemory
Create hunting rule
Author:netbiosX, Florian Roth
Description:Detects Meterpreter in-memory
Reference:https://www.reddit.com/r/purpleteamsec/comments/hjux11/meterpreter_memory_indicators_detection_tooling/
Rule name:HKTL_Win_CobaltStrike
Create hunting rule
Author:threatintel@volexity.com
Description:The CobaltStrike malware family.
Reference:https://www.volexity.com/blog/2021/05/27/suspected-apt29-operation-launches-election-fraud-themed-phishing-campaigns/
Rule name:MALW_cobaltrike
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Rule to detect CobaltStrike beacon
Reference:https://malpedia.caad.fkie.fraunhofer.de/details/win.cobalt_strike
Rule name:meth_stackstrings
Create hunting rule
Author:Willi Ballenthin
Rule name:ReflectiveLoader
Create hunting rule
Author:Florian Roth (Nextron Systems)
Description:Detects a unspecified hack tool, crack or malware using a reflective loader - no hard match - further investigation recommended
Reference:Internal Research
Rule name:Rustyloader_mem_loose
Create hunting rule
Author:James_inthe_box
Description:Corroded buerloader
Reference:https://app.any.run/tasks/83064edd-c7eb-4558-85e8-621db72b2a24
Rule name:SUSP_XORed_Mozilla
Create hunting rule
Author:Florian Roth (Nextron Systems)
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
Rule name:Trojan_Raw_Generic_4
Create hunting rule
Author:FireEye
Reference:https://www.fireeye.com/blog/products-and-services/2020/12/fireeye-shares-details-of-recent-cyber-attack-actions-to-protect-community.html
Rule name:Windows_Trojan_CobaltStrike_1787eef5
Create hunting rule
Author:Elastic Security
Description:CS shellcode variants
Rule name:Windows_Trojan_CobaltStrike_663fc95d
Create hunting rule
Author:Elastic Security
Description:Identifies CobaltStrike via unidentified function code
Rule name:Windows_Trojan_CobaltStrike_b54b94ac
Create hunting rule
Description:Rule for beacon sleep obfuscation routine
Rule name:Windows_Trojan_CobaltStrike_ee756db7
Create hunting rule
Description:Attempts to detect Cobalt Strike based on strings found in BEACON
Rule name:Windows_Trojan_CobaltStrike_f0b627fc
Create hunting rule
Description:Rule for beacon reflective loader
Rule name:win_cobalt_strike_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.cobalt_strike.

File information

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

Cape
Cape
https://www.capesandbox.com/analysis/420395/

Comments