MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 e95a5072b5ea6d8392293d20e71ff452e9863200d786e8c80d65c5f01d14e768. 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 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: e95a5072b5ea6d8392293d20e71ff452e9863200d786e8c80d65c5f01d14e768
SHA3-384 hash: 7a0ae74decef97d469e3da49a149a9d9778e839562cacd60f91b161707e1abb58a6d1f0fc3e2c79e3cf1ef84b7306643
SHA1 hash: 7212d262ce8063b8c9fac74d9383550762b23369
MD5 hash: f15cb85951ccdddc8f97651935b558c1
humanhash: cardinal-wisconsin-connecticut-tennessee
File name:Reciept 8174939.xlsb
Download: download sample
Signature CobaltStrike
Create hunting rule
File size:68'223 bytes
First seen:2021-07-06 15:18:22 UTC
Last seen:2021-07-06 15:49:06 UTC
File type:Excel file xlsx
MIME type:application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
ssdeep 1536:SkhEtPBDdExnKaal40y+sUKHtg3eLmsqU44444444444mnwUXY:SkhEtPFYKaal8UqY4V1XY
TLSH FC63CF24E79919BBF26480B4F22A59833908AC777011ED1454EB345FAB87FB61DBCF12
Reporter abuse_ch
Tags:CobaltStrike xlsb xlsx

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
A45234 bytesVBA/ThisWorkbook
A53764 bytesVBA/_VBA_PROJECT
A61263 bytesVBA/__SRP_0
A7123 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 :
538
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Reciept 8174939.xlsb
Verdict:
No threats detected
Analysis date:
2021-07-06 15:27:59 UTC
Tags:
macros macros-on-open
Link:
https://app.any.run/tasks/f92a0841-ac5b-44cf-bee5-a7515c021c94

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/169989/
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/e95a5072b5ea6d8392293d20e71ff452e9863200d786e8c80d65c5f01d14e768/results/dashboard
Document image
Image:
Download PNG
Document image
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/e95a5072b5ea6d8392293d20e71ff452e9863200d786e8c80d65c5f01d14e768
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/812373
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: 444787 Sample: Reciept 8174939.xlsb Startdate: 06/07/2021 Architecture: WINDOWS Score: 100 41 Found malware configuration 2->41 43 Malicious sample detected (through community Yara rule) 2->43 45 Yara detected Powershell download and execute 2->45 47 9 other signatures 2->47 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        35 C:\Users\user\...\~$Reciept 8174939.xlsb, data 10->35 dropped process5 process6 17 WMIC.exe 12 13->17         started        21 WMIC.exe 11 15->21         started        dnsIp7 37 45.153.241.113, 49165, 49480, 80 COMBAHTONcombahtonGmbHDE Germany 17->37 27 C:\Windows\Temp\velao.exe, PE32 17->27 dropped 29 C:\Users\user\AppData\Local\...\pload[1].exe, PE32 17->29 dropped 23 velao.exe 17->23         started        31 C:\Windows\Temp\t4efj.exe, PE32 21->31 dropped 33 C:\Users\user\AppData\Local\...\pload[1].exe, PE32 21->33 dropped file8 process9 dnsIp10 39 31.42.177.52, 49166, 49167, 49168 YANINA-ASUA Ukraine 23->39 49 Detected unpacking (changes PE section rights) 23->49 51 Detected unpacking (overwrites its own PE header) 23->51 53 Machine Learning detection for dropped file 23->53 55 3 other signatures 23->55 signatures11
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/e95a5072b5ea6d8392293d20e71ff452e9863200d786e8c80d65c5f01d14e768/
Threat name:
Document-Office.Trojan.Heuristic
Create hunting rule
Status:
Malicious
First seen:
2021-07-06 15:19:15 UTC
AV detection:
3 of 46 (6.52%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=5fnfa4vv5jwyherjhuqooh7ukluymmqa26dorsanmxc7ahiu45ua._file
Result
Malware family:
n/a
Score:
  8/10
Tags:
macro
Link:
https://tria.ge/reports/210706-xv8l852fdx/
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/e95a5072b5ea6d8392293d20e71ff452e9863200d786e8c80d65c5f01d14e768

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_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 e95a5072b5ea6d8392293d20e71ff452e9863200d786e8c80d65c5f01d14e768

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/169989/

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