MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 71a8e488b3d142bfdfcc4092ac35cf32e7d5e55b68acd262d16707f6a09f9321. 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
CrimsonRAT
Vendor detections: 8
Maldoc score: 31
| SHA256 hash: | 71a8e488b3d142bfdfcc4092ac35cf32e7d5e55b68acd262d16707f6a09f9321 |
|---|---|
| SHA3-384 hash: | 31b47dbe8a3efa79186e0ee54baf4cb87bfa7fa8dcb01e3bc63e8aaaea39a2b8f83afec84399b20e81ed20280da3b115 |
| SHA1 hash: | abc72dd17e19f06a3724faf5452bd25a42d0f7de |
| MD5 hash: | cb27d0bd9a97e053f3fbfcf4bba8b8fc |
| humanhash: | colorado-orange-wisconsin-skylark |
| File name: | Ultimate-File(1).docm |
| Download: | download sample |
| Signature | CrimsonRAT |
| File size: | 245'696 bytes |
| First seen: | 2021-05-30 11:20:30 UTC |
| Last seen: | Never |
| File type: |  docm |
| MIME type: | application/vnd.openxmlformats-officedocument.wordprocessingml.document |
| ssdeep | 6144:1zywhuqvpRQ7Vl6lb57sPnUiQaL+Q6tp74E8D09Zjht:1GwlM7zYsPUiv96b4eZjht |
| TLSH | 5534237A2BD4FA18CA4D50B98468008CE71C2A18D968C347BFDD50B5D3671ABD1F72ED |
| Reporter |  abuse_ch |
| Tags: | CrimsonRAT docm |
Indicators Of Compromise (IOCs)
Below is a list of indicators of compromise (IOCs) associated with this malware samples.
| IOC | ThreatFox Reference |
|---|---|
| 134.119.181.142:6672 | https://threatfox.abuse.ch/ioc/67322/ |
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: 31 |
OLE dump
MalwareBazaar was able to identify 18 sections in this file using oledump:
| Section ID | Section size | Section name |
|---|---|---|
| A1 | 647 bytes | PROJECT |
| A2 | 149 bytes | PROJECTwm |
| A3 | 97 bytes | UserForm1/CompObj |
| A4 | 293 bytes | UserForm1/VBFrame |
| A5 | 187 bytes | UserForm1/f |
| A6 | 816596 bytes | UserForm1/o |
| A7 | 97 bytes | UserForm2/CompObj |
| A8 | 292 bytes | UserForm2/VBFrame |
| A9 | 147 bytes | UserForm2/f |
| A10 | 91200 bytes | UserForm2/o |
| A11 | 3949 bytes | VBA/Module1 |
| A12 | 3436 bytes | VBA/Module2 |
| A13 | 1144 bytes | VBA/ThisDocument |
| A14 | 2332 bytes | VBA/UserForm1 |
| A15 | 1467 bytes | VBA/UserForm2 |
| A16 | 4210 bytes | VBA/_VBA_PROJECT |
| A17 | 901 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 | Document_Open | Runs when the Word or Publisher document is opened |
| AutoExec | UserForm_Click | Runs when the file is opened and ActiveX objects trigger events |
| AutoExec | TextBox1_Change | Runs when the file is opened and ActiveX objects trigger events |
| Suspicious | Environ | May read system environment variables |
| Suspicious | Open | May open a file |
| Suspicious | Write | May write to a file (if combined with Open) |
| Suspicious | Put | May write to a file (if combined with Open) |
| Suspicious | Binary | May read or write a binary file (if combined with Open) |
| Suspicious | CopyHere | May copy a file |
| Suspicious | Shell | May run an executable file or a system command |
| Suspicious | vbNormalNoFocus | May run an executable file or a system command |
| Suspicious | MkDir | May create a directory |
| Suspicious | CreateObject | May create an OLE object |
| Suspicious | Shell.Application | May run an application (if combined with CreateObject) |
| 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) |
| Suspicious | Base64 Strings | Base64-encoded strings were detected, may be used to obfuscate strings (option --decode to see all) |
Intelligence
File Origin
# of uploads :
1
# of downloads :
1'352
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Ultimate-File(1).docm
Verdict:
Malicious activity
Analysis date:
2021-05-30 11:22:29 UTC
Tags:
macros macros-on-open trojan rat crimson
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
File type:
application/vnd.ms-word.document.macroEnabled.12
Has a screenshot:
False
Contains macros:
True
Result
Verdict:
Clean
Maliciousness:
Behaviour
Creating a window
Creating a file
Creating a file in the Program Files subdirectories
Creating a process with a hidden window
Sending a custom TCP request
Result
Verdict:
Malicious
File Type:
Word File with Macro
Result
Threat name:
Unknown
Detection:
malicious
Classification:
spyw.expl
Score:
100 / 100
Signature
Antivirus detection for dropped file
Contains functionality to capture screen (.Net source)
Document contains an embedded VBA macro with suspicious strings
Document contains an embedded VBA with base64 encoded strings
Document contains an embedded VBA with functions possibly related to ADO stream file operations
Document exploit detected (creates forbidden files)
Document exploit detected (drops PE files)
Document exploit detected (process start blacklist hit)
Machine Learning detection for dropped file
Machine Learning detection for sample
Multi AV Scanner detection for submitted file
Office process drops PE file
Behaviour
Behavior Graph:
Threat name:
Script-Macro.Dropper.SDrop
Status:
Malicious
First seen:
2021-05-30 11:21:13 UTC
AV detection:
9 of 47 (19.15%)
Threat level:
3/5
Detection(s):
Malicious file
Result
Malware family:
n/a
Score:
8/10
Tags:
macro
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies Internet Explorer settings
Modifies registry class
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Office loads VBA resources, possible macro or embedded object present
Drops file in Program Files directory
Drops file in Windows directory
Loads dropped DLL
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
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.
No further information available
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