MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 fc15f958384227e0df809fe1f0e043c2c596d88d0de5b6c799799529626a414c. 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
AsyncRAT
Vendor detections: 11
Maldoc score: 19
| SHA256 hash: | fc15f958384227e0df809fe1f0e043c2c596d88d0de5b6c799799529626a414c |
|---|---|
| SHA3-384 hash: | a17a2f5242356b985f1616d157858dee8f2e8d16328649aa35909bd26c9c24aa8d803f2ab0b46f581e3c686d861c2ffe |
| SHA1 hash: | 55b2f166b64ff820287bf7dd27ee6249df73cbc2 |
| MD5 hash: | 55fc048da179b62b3bb1ba86120ed35d |
| humanhash: | william-pizza-november-happy |
| File name: | Letter of Demand.doc |
| Download: | download sample |
| Signature | AsyncRAT |
| File size: | 37'376 bytes |
| First seen: | 2021-05-12 13:00:54 UTC |
| Last seen: | 2021-05-12 14:20:11 UTC |
| File type: |  doc |
| MIME type: | application/msword |
| ssdeep | 384:wnE8iSwvxjk+tyEogv8oNnAR03OwEw7950j14hcgQt:iqxw+tXnAR03Owl7Xdhcg |
| TLSH | AAF29312B2D6DD1BF26944344DC7CBEA73387C499E06C35B3294BB6EAC793708A22754 |
| Reporter |  abuse_ch |
| Tags: | AsyncRAT doc RAT |
Indicators Of Compromise (IOCs)
Below is a list of indicators of compromise (IOCs) associated with this malware samples.
| IOC | ThreatFox Reference |
|---|---|
| 185.136.169.24:8808 | https://threatfox.abuse.ch/ioc/36196/ |
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: 19 |
| Application name is Microsoft Office Word |
| Office document is in OLE format |
| Office document contains VBA Macros |
OLE dump
MalwareBazaar was able to identify 11 sections in this file using oledump:
| Section ID | Section size | Section name |
|---|---|---|
| 1 | 114 bytes | CompObj |
| 2 | 4096 bytes | DocumentSummaryInformation |
| 3 | 4096 bytes | SummaryInformation |
| 4 | 7081 bytes | 1Table |
| 5 | 418 bytes | Macros/PROJECT |
| 6 | 71 bytes | Macros/PROJECTwm |
| 7 | 7579 bytes | Macros/VBA/NewMacros |
| 8 | 938 bytes | Macros/VBA/ThisDocument |
| 9 | 4093 bytes | Macros/VBA/_VBA_PROJECT |
| 10 | 571 bytes | Macros/VBA/dir |
| 11 | 4096 bytes | WordDocument |
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 |
| 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 | SaveToFile | May create a text file |
| Suspicious | Shell | May run an executable file or a system command |
| Suspicious | CreateObject | May create an OLE object |
| Suspicious | Microsoft.XMLHTTP | May download files from the Internet |
| Suspicious | Chr | May attempt to obfuscate specific strings (use option --deobf to deobfuscate) |
| Suspicious | Base64 Strings | Base64-encoded strings were detected, may be used to obfuscate strings (option --decode to see all) |
Intelligence
File Origin
# of uploads :
3
# of downloads :
123
Origin country :
n/a
Vendor Threat Intelligence
Verdict:
Malicious
File type:
application/msword
Has a screenshot:
False
Contains macros:
True
Detection(s):
MiscreantPunch.EvilMacro.DL.170224.UNOFFICIAL
TwinWave.EvilDoc.UrlDownloaderCROSingingMonyMony.20200526.UNOFFICIAL
TwinWave.EvilDoc.CROKissFromARose.M2.20201210.UNOFFICIAL
TwinWave.EvilDoc.UnderWorldCowGirlVar2Far.20201229.UNOFFICIAL
TwinWave.EvilDoc.WhatItSoundsLikeWhenEncodersCry.20210216.UNOFFICIAL
Sanesecurity.Badmacro.doc_shellao.UNOFFICIAL
TwinWave.EvilDoc.UrlDownloaderCROSingingMonyMony.20200526.UNOFFICIAL
TwinWave.EvilDoc.CROKissFromARose.M2.20201210.UNOFFICIAL
TwinWave.EvilDoc.UnderWorldCowGirlVar2Far.20201229.UNOFFICIAL
TwinWave.EvilDoc.WhatItSoundsLikeWhenEncodersCry.20210216.UNOFFICIAL
Sanesecurity.Badmacro.doc_shellao.UNOFFICIAL
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a window
DNS request
Creating a file in the %temp% directory
Creating a process with a hidden window
Creating a file in the %AppData% directory
Launching a process
Deleting a recently created file
Sending a custom TCP request
Sending an HTTP GET request
Unauthorized injection to a recently created process by context flags manipulation
Creating a process from a recently created file
Enabling autorun by creating a file
Result
Verdict:
Malicious
File Type:
Legacy Word File with Macro
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.
Document With Few Pages
Document contains between one and three pages of content. Most malicious documents are sparse in page count.
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:
AsyncRAT
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Signature
.NET source code contains potential unpacker
Antivirus / Scanner detection for submitted sample
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 HTTP operations
Document contains an embedded VBA with many randomly named variables
Document exploit detected (creates forbidden files)
Document exploit detected (drops PE files)
Document exploit detected (process start blacklist hit)
Found malware configuration
Injects a PE file into a foreign processes
Machine Learning detection for sample
Office process drops PE file
Sigma detected: MS Office Product Spawning Exe in User Dir
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to harvest and steal browser information (history, passwords, etc)
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AntiVM3
Yara detected AsyncRAT
Yara detected Costura Assembly Loader
Behaviour
Behavior Graph:
Detection:
asyncrat
Threat name:
Script-Macro.Downloader.SLoad
Status:
Malicious
First seen:
2021-05-12 13:01:10 UTC
AV detection:
20 of 47 (42.55%)
Threat level:
3/5
Detection(s):
Suspicious file
Result
Malware family:
asyncrat
Score:
10/10
Tags:
family:asyncrat macro macro_on_action rat spyware stealer xlm
Behaviour
Checks processor information in registry
Creates scheduled task(s)
Enumerates system info in registry
Modifies Internet Explorer settings
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
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
Drops file in Windows directory
Suspicious use of SetThreadContext
Loads dropped DLL
Reads user/profile data of web browsers
Downloads MZ/PE file
Executes dropped EXE
Async RAT payload
AsyncRat
Malware Config
C2 Extraction:
185.136.169.24:6606
185.136.169.24:7707
185.136.169.24:8808
185.136.169.24:7707
185.136.169.24:8808
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: | Office_AutoOpen_Macro |
|---|---|
| Author: | Florian Roth |
| Description: | Detects an Microsoft Office file that contains the AutoOpen Macro function |
| 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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