MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 2b0c5224050242b238dc90fe1170856c59c2083836b4472e0e70ebf386c378a9. 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: 7


Maldoc score: 17


Intelligence 7 IOCs YARA 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 2b0c5224050242b238dc90fe1170856c59c2083836b4472e0e70ebf386c378a9
SHA3-384 hash: a125f581711ca808693372af4a490e6815ff75ef3efdf9d2c1e4ec976e475ca98928f337ece9ebd9810a33f09542d08a
SHA1 hash: ddf463773c3b7b2b3668379821bc6d31931e369a
MD5 hash: 36440f63c73652e73f0487907b2e8ca5
humanhash: oranges-alanine-equal-west
File name:Reciept 7505704.xlsb
Download: download sample
Signature CobaltStrike
Create hunting rule
File size:69'709 bytes
First seen:2021-07-06 15:31:24 UTC
Last seen:2021-07-06 17:18:18 UTC
File type:Excel file xlsx
MIME type:application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
ssdeep 1536:SkhOSlUzGHakaWRfRvOqtg3eLmsqU44444444444NA:SkhOSlUG+GpGEY4Vf
TLSH F163D025E39508B3F22580F4F21616A728596C7BB010EE01A4DB785F774BFB22D78F65
Reporter abuse_ch
Tags:CobaltStrike xlsb xlsx


Avatar
abuse_ch
CobaltStrike payload URL:
http://37.120.222.56/download/zlnch.exe

CobaltStrike C2:
http://31.42.177.52/dpixel

Office OLE Information

This malware samples appears to be an Office document. The following table provides more information about this document using oletools and oledump.

OLE id
Maldoc score: 17
OLE dump

MalwareBazaar was able to identify 11 sections in this file using oledump:

Section IDSection sizeSection name
A1422 bytesPROJECT
A262 bytesPROJECTwm
A3977 bytesVBA/Sheet1
A45257 bytesVBA/ThisWorkbook
A53753 bytesVBA/_VBA_PROJECT
A61235 bytesVBA/__SRP_0
A7125 bytesVBA/__SRP_1
A8380 bytesVBA/__SRP_2
A9196 bytesVBA/__SRP_3
A10514 bytesVBA/dir
OLE vba

MalwareBazaar was able to extract and deobfuscate VBA script(s) the following information from OLE objects embedded in this file using olevba:

TypeKeywordDescription
AutoExecWorkbook_OpenRuns when the Excel Workbook is opened
SuspiciousEnvironMay read system environment variables
SuspiciousWriteMay write to a file (if combined with Open)
SuspiciousCreateTextFileMay create a text file
SuspiciousCreateMay execute file or a system command through WMI
SuspiciousCreateObjectMay create an OLE object
SuspiciousChrMay attempt to obfuscate specific strings (use option --deobf to deobfuscate)
SuspiciousHex StringsHex-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)
SuspiciousBase64 StringsBase64-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)

Intelligence

File Origin
# of uploads :
2
# of downloads :
541
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Reciept 7505704.xlsb
Verdict:
No threats detected
Analysis date:
2021-07-06 17:18:00 UTC
Tags:
macros macros-on-open
Link:
https://app.any.run/tasks/9826b936-3331-4f7e-8456-a570845f7e17

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Legit
File type:
application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
Has a screenshot:
False
Contains macros:
True
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/169994/
Detection(s):
TwinWave.EvilDoc.Dridex.Low.20210520.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.DridexOneByOneTheQuickAndTheDead.20210629.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.MacroSchedTaskLOLBINHammerToFall.20210702.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malicious
File Type:
Excel File with Macro
Link:
https://app.docguard.net/2b0c5224050242b238dc90fe1170856c59c2083836b4472e0e70ebf386c378a9/results/dashboard
Document image
Image:
Download PNG
Document image
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/2b0c5224050242b238dc90fe1170856c59c2083836b4472e0e70ebf386c378a9
Details
Macro with Startup Hook
Detected macro logic that will automatically execute on document open. Most malware contains some execution hook.
Macro with File System Write
Detected macro logic that can write data to the file system.
Macro Contains Suspicious String
Detected a macro with a suspicious string. Suspicious strings include privileged function calls, obfuscations, odd registry keys, etc...
Result
Threat name:
CobaltStrike
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/812386
Signature
C2 URLs / IPs found in malware configuration
Contains functionality to detect sleep reduction / modifications
Detected unpacking (changes PE section rights)
Detected unpacking (overwrites its own PE header)
Document contains an embedded VBA macro with suspicious strings
Document contains an embedded VBA with functions possibly related to ADO stream file operations
Found malware configuration
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Sigma detected: WMIC launch script from xsl file
Tries to detect sandboxes / dynamic malware analysis system (file name check)
Tries to detect virtualization through RDTSC time measurements
Yara detected CobaltStrike
Yara detected Powershell download and execute
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 444799 Sample: Reciept 7505704.xlsb Startdate: 06/07/2021 Architecture: WINDOWS Score: 100 45 Found malware configuration 2->45 47 Malicious sample detected (through community Yara rule) 2->47 49 Yara detected Powershell download and execute 2->49 51 8 other signatures 2->51 8 taskeng.exe 1 2->8         started        10 EXCEL.EXE 8 11 2->10         started        process3 file4 13 mshta.exe 10 8->13         started        15 mshta.exe 10 8->15         started        39 C:\Users\user\...\~$Reciept 7505704.xlsb, data 10->39 dropped process5 process6 17 WMIC.exe 12 13->17         started        21 WMIC.exe 11 15->21         started        dnsIp7 41 37.120.222.56, 49165, 49528, 80 M247GB Romania 17->41 27 C:\Windows\Temp\88hzt.exe, PE32 17->27 dropped 29 C:\Users\user\AppData\Local\...\zlnch[1].exe, PE32 17->29 dropped 23 88hzt.exe 17->23         started        31 C:\Windows\Temp\jzn6e.exe, PE32 21->31 dropped 33 C:\Users\user\AppData\Local\...\pload[1].exe, PE32 21->33 dropped 35 C:\Users\user\AppData\Local\...\zlnch[1].exe, PE32 21->35 dropped 37 C:\Users\user\AppData\Local\...\klinch[1].exe, PE32 21->37 dropped file8 process9 dnsIp10 43 31.42.177.52, 49166, 49167, 49168 YANINA-ASUA Ukraine 23->43 53 Detected unpacking (changes PE section rights) 23->53 55 Detected unpacking (overwrites its own PE header) 23->55 57 Machine Learning detection for dropped file 23->57 59 3 other signatures 23->59 signatures11
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/2b0c5224050242b238dc90fe1170856c59c2083836b4472e0e70ebf386c378a9/
Threat name:
Document-Office.Trojan.Heuristic
Create hunting rule
Status:
Malicious
First seen:
2021-07-06 15:32:21 UTC
AV detection:
4 of 46 (8.70%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=fmgfejafajbleog4sd7bc4efnrm4ecbyg22eolqoodv7hbwdpcuq._file
Result
Malware family:
n/a
Score:
  8/10
Tags:
macro
Link:
https://tria.ge/reports/210706-kkh8fk15wx/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies Internet Explorer settings
Suspicious behavior: AddClipboardFormatListener
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Office loads VBA resources, possible macro or embedded object present
Enumerates physical storage devices
Blocklisted process makes network request
Downloads MZ/PE file
Executes dropped EXE
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/2b0c5224050242b238dc90fe1170856c59c2083836b4472e0e70ebf386c378a9

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:Email_stealer_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Email in files like avemaria
Rule name:INDICATOR_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFu
Create hunting rule
Author:ditekSHen
Description:Detect executables with stomped PE compilation timestamp that is greater than local current time
Rule name:INDICATOR_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFuture
Create hunting rule
Author:ditekSHen
Description:Detect executables with stomped PE compilation timestamp that is greater than local current time
Rule name:IPPort_combo_mem
Create hunting rule
Author:James_inthe_box
Description:IP and port combo
Rule name:Select_from_enumeration
Create hunting rule
Author:James_inthe_box
Description:IP and port combo
Rule name:SharedStrings
Create hunting rule
Author:Katie Kleemola
Description:Internal names found in LURK0/CCTV0 samples
Rule name:UAC_bypass_bin_mem
Create hunting rule
Author:James_inthe_box
Description:UAC bypass in files like avemaria

File information

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

Malspam

CobaltStrike

Excel file xlsx 2b0c5224050242b238dc90fe1170856c59c2083836b4472e0e70ebf386c378a9

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/1431198/
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/169994/

Comments