MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 f026659380293aebc45bc97cd4aeee19c96e8ae5b88673283f2ed113bed4110f. 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: 10
Maldoc score: 27
| SHA256 hash: | f026659380293aebc45bc97cd4aeee19c96e8ae5b88673283f2ed113bed4110f |
|---|---|
| SHA3-384 hash: | 887186dd17aad0c5bda8f1ed4eed91752535e5cb8773d25655413cf2b0168999d46734def9be8d6a0def17ea96e01998 |
| SHA1 hash: | a503bfdf64589003faeee0857cb9808fdc659dea |
| MD5 hash: | d68eb2a0c4ef9306e93e7f993544bbfe |
| humanhash: | hamper-oregon-pasta-oregon |
| File name: | SecuriteInfo.com.VB.Heur2.EmoDldr.5.18D41831.Gen.23202.26536 |
| Download: | download sample |
| Signature | CobaltStrike |
| File size: | 25'731 bytes |
| First seen: | 2021-03-04 08:10:31 UTC |
| Last seen: | Never |
| File type: |  xlsx |
| MIME type: | application/vnd.openxmlformats-officedocument.spreadsheetml.sheet |
| ssdeep | 768:E2GfxWpR3XUahr3VyN+uwf4hc9ytuAetivywZ7e:E1fxW3DdVynQ4duntpwZ7e |
| TLSH | 9FC2C026FC985A7DC850D03E354F4DB5D78D1489AB86789C3813EBF277A05E7420936B |
| Reporter |  SecuriteInfoCom |
| Tags: | CobaltStrike |
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: 27 |
OLE dump
MalwareBazaar was able to identify 12 sections in this file using oledump:
| Section ID | Section size | Section name |
|---|---|---|
| A1 | 465 bytes | PROJECT |
| A2 | 86 bytes | PROJECTwm |
| A3 | 17503 bytes | VBA/Module1 |
| A4 | 993 bytes | VBA/Sheet1 |
| A5 | 1001 bytes | VBA/ThisWorkbook |
| A6 | 3002 bytes | VBA/_VBA_PROJECT |
| A7 | 16522 bytes | VBA/__SRP_0 |
| A8 | 74 bytes | VBA/__SRP_1 |
| A9 | 3580 bytes | VBA/__SRP_2 |
| A10 | 177 bytes | VBA/__SRP_3 |
| A11 | 568 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 | AutoOpen | Runs when the Word document is opened |
| AutoExec | Auto_Open | Runs when the Excel Workbook is opened |
| AutoExec | Workbook_Open | Runs when the Excel Workbook is opened |
| IOC | 0.dll | Executable file name |
| IOC | MSBuild.exe | Executable file name |
| 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 | Shell | May run an executable file or a system command |
| Suspicious | WScript.Shell | May run an executable file or a system command |
| Suspicious | Run | May run an executable file or a system command |
| Suspicious | CreateObject | May create an OLE object |
| Suspicious | Windows | May enumerate application windows (if combined with Shell.Application object) |
| Suspicious | CreateThread | May inject code into another process |
| Suspicious | VirtualAlloc | May inject code into another process |
| Suspicious | System | May run an executable file or a system command on a Mac (if combined with libc.dylib) |
| Suspicious | Hex Strings | Hex-encoded strings were detected, may be used to obfuscate strings (option --decode to see all) |
Intelligence
File Origin
# of uploads :
1
# of downloads :
547
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
msbuild_vba.xlsm
Verdict:
Malicious activity
Analysis date:
2021-03-04 04:47:34 UTC
Tags:
macros macros-on-open trojan cobaltstrike
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:
Malware
Maliciousness:
Behaviour
Creating a window
Creating a file
Creating a process with a hidden window
Creating a file in the %temp% directory
Launching a process
Deleting a recently created file
DNS request
Sending an HTTP GET request
Launching a process by exploiting the app vulnerability
Result
Verdict:
Suspicious
File Type:
Excel File with Macro
Result
Verdict:
MALICIOUS
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...
InQuest Machine Learning
An InQuest machine-learning model classified this macro as potentially malicious.
Document With No Content
Document contains little or no semantic information.
Result
Threat name:
CobaltStrike
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Signature
Document contains an embedded VBA macro which may execute processes
Document contains an embedded VBA macro with suspicious strings
Document contains an embedded VBA with functions possibly related to ADO stream file operations
Document contains an embedded VBA with functions possibly related to WSH operations (process, registry, environment, or keystrokes)
Document contains an embedded VBA with many string operations indicating source code obfuscation
Document exploit detected (process start blacklist hit)
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Sigma detected: Dot net compiler compiles file from suspicious location
Sigma detected: Microsoft Office Product Spawning Windows Shell
Yara detected CobaltStrike
Behaviour
Behavior Graph:
Threat name:
Script-Macro.Trojan.Heuristic
Status:
Malicious
First seen:
2021-03-03 19:07:38 UTC
AV detection:
15 of 46 (32.61%)
Threat level:
2/5
Detection(s):
Suspicious file
Result
Malware family:
metasploit
Score:
10/10
Tags:
family:cobaltstrike family:metasploit backdoor macro trojan
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies Internet Explorer settings
Suspicious behavior: AddClipboardFormatListener
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Office loads VBA resources, possible macro or embedded object present
Cobaltstrike
MetaSploit
Process spawned unexpected child process
Malware Config
C2 Extraction:
http://resources.healthmade.org:80/thumb/preview.gif
http://resources.healthmade.org:80/__utm.gif
http://resources.healthmade.org:80/__utm.gif
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: | Email_stealer_bin_mem |
|---|---|
| Author: | James_inthe_box |
| Description: | Email in files like avemaria |
| Rule name: | IPPort_combo_mem |
|---|---|
| Author: | James_inthe_box |
| Description: | IP and port combo |
| Rule name: | Select_from_enumeration |
|---|---|
| Author: | James_inthe_box |
| Description: | IP and port combo |
| Rule name: | SharedStrings |
|---|---|
| Author: | Katie Kleemola |
| Description: | Internal names found in LURK0/CCTV0 samples |
| Rule name: | UAC_bypass_bin_mem |
|---|---|
| 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.
Web download
Delivery method
Distributed via web download
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