MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 a01feb0cc0f71ea4c1d55fff2a54a3ab5f2ad4b8d1aa1b93de814b7e6b31fc99. 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
| SHA256 hash: | a01feb0cc0f71ea4c1d55fff2a54a3ab5f2ad4b8d1aa1b93de814b7e6b31fc99 |
|---|---|
| SHA3-384 hash: | 8b2358effdd40a6be8bf4efd9c8e1ddd4dae51180689efe3679e3dd711cb5711775d52893ef7bfb6b1ed1d11011ac767 |
| SHA1 hash: | 9240d21ab6150f8b0dc8ee0c0caad607abc866b6 |
| MD5 hash: | 1d23f3324bed375df4da3ec19ce76c6b |
| humanhash: | stream-seven-vegan-golf |
| File name: | dri.xlsb |
| Download: | download sample |
| Signature | CobaltStrike |
| File size: | 435'485 bytes |
| First seen: | 2021-07-08 04:21:20 UTC |
| Last seen: | 2021-07-08 04:36:04 UTC |
| File type: |  xlsx |
| MIME type: | application/vnd.openxmlformats-officedocument.spreadsheetml.sheet |
| ssdeep | 12288:00u9lPzblcNLwYAKtlLFWqJ1YBCXrsDdH:YPflcFwH30cCOH |
| TLSH | T1639412C8B8BBEC37DFCF117AD6801F9E01B5024683C85A37E272B4EDC598E295164E56 |
| Reporter |  ankit_anubhav |
| Tags: | CobaltStrike 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 ID | Section size | Section name |
|---|---|---|
| A1 | 410 bytes | PROJECT |
| A2 | 62 bytes | PROJECTwm |
| A3 | 977 bytes | VBA/Sheet1 |
| A4 | 5287 bytes | VBA/ThisWorkbook |
| A5 | 3837 bytes | VBA/_VBA_PROJECT |
| A6 | 1233 bytes | VBA/__SRP_0 |
| A7 | 134 bytes | VBA/__SRP_1 |
| A8 | 380 bytes | VBA/__SRP_2 |
| A9 | 196 bytes | VBA/__SRP_3 |
| A10 | 514 bytes | VBA/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:
| Type | Keyword | Description |
|---|---|---|
| AutoExec | Workbook_Open | Runs when the Excel Workbook is opened |
| Suspicious | Environ | May read system environment variables |
| Suspicious | Write | May write to a file (if combined with Open) |
| Suspicious | CreateTextFile | May create a text file |
| Suspicious | Create | May execute file or a system command through WMI |
| Suspicious | CreateObject | May create an OLE object |
| Suspicious | Chr | May attempt to obfuscate specific strings (use option --deobf to deobfuscate) |
| Suspicious | Hex Strings | Hex-encoded strings were detected, may be used to obfuscate strings (option --decode to see all) |
| Suspicious | Base64 Strings | Base64-encoded strings were detected, may be used to obfuscate strings (option --decode to see all) |
Intelligence
File Origin
# of uploads :
2
# of downloads :
487
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
dri.xlsb
Verdict:
No threats detected
Analysis date:
2021-07-08 04:20:09 UTC
Tags:
macros macros-on-open
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
Result
Verdict:
Malicious
File Type:
Excel File with Macro
Document image
Image:
Result
Verdict:
MALICIOUS
Link:
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 Execution Coercion
Detected a document that appears to social engineer the user into activating embedded logic.
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:
CryptOne CobaltStrike
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Signature
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Contains functionality to detect sleep reduction / modifications
Detected CryptOne packer
Detected unpacking (changes PE section rights)
Detected unpacking (overwrites its own PE header)
Document contains an embedded VBA macro with suspicious strings
Found malware configuration
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)
Sigma detected: WMIC launch script from xsl file
Yara detected CobaltStrike
Yara detected Powershell download and execute
Behaviour
Behavior Graph:
Threat name:
Script-Macro.Downloader.EncDoc
Status:
Malicious
First seen:
2021-07-08 04:08:00 UTC
AV detection:
11 of 29 (37.93%)
Threat level:
3/5
Detection(s):
Suspicious file
Result
Malware family:
n/a
Score:
8/10
Tags:
n/a
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies Internet Explorer settings
Modifies system certificate store
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
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
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: | INDICATOR_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFuture |
|---|---|
| Author: | ditekSHen |
| Description: | Detect executables with stomped PE compilation timestamp that is greater than local current time |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
Comments
Login required
You need to login to in order to write a comment. Login with your abuse.ch account.