MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 fdaad14f5c83320a913b69958e61343f9bf17f8b3a05baca81ae96da6abdedb5. 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
RemcosRAT
Vendor detections: 14
Maldoc score: 9
| SHA256 hash: | fdaad14f5c83320a913b69958e61343f9bf17f8b3a05baca81ae96da6abdedb5 |
|---|---|
| SHA3-384 hash: | 4b90478d0fb884ea0d406111b3fcd45d4367f1c4f02daaba959931d4a1410af16952e8c3e6901c755f15ad84253c3f53 |
| SHA1 hash: | 2385bdfd57c63662b5b6daa899a034f547ec4a4d |
| MD5 hash: | 30e95bfee5d8c17c5bb63f0d04981d22 |
| humanhash: | cup-potato-speaker-vermont |
| File name: | WF.Secure.Document.0000202112.xlsb |
| Download: | download sample |
| Signature | RemcosRAT |
| File size: | 157'388 bytes |
| First seen: | 2021-12-21 08:11:52 UTC |
| Last seen: | Never |
| File type: |  xlsx |
| MIME type: | application/vnd.openxmlformats-officedocument.spreadsheetml.sheet |
| ssdeep | 3072:wdZ3JMOb9YfDtPyPpZb8eKmgSHD8TKCxqRT/vy5671C9Bq:wdzMYYfRyVK4HDDF/7U9Bq |
| TLSH | T19EF3CF72501CCBA4DC35E3B492285F2117AF4CA5949283B3A53AA90C5DD368B3F96CDF |
| Reporter |  abuse_ch |
| Tags: | RemcosRAT 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: 9 |
OLE dump
MalwareBazaar was able to identify 11 sections in this file using oledump:
| Section ID | Section size | Section name |
|---|---|---|
| A1 | 426 bytes | PROJECT |
| A2 | 62 bytes | PROJECTwm |
| A3 | 991 bytes | VBA/Sheet1 |
| A4 | 2971 bytes | VBA/ThisWorkbook |
| A5 | 2578 bytes | VBA/_VBA_PROJECT |
| A6 | 1628 bytes | VBA/__SRP_0 |
| A7 | 226 bytes | VBA/__SRP_1 |
| A8 | 853 bytes | VBA/__SRP_2 |
| A9 | 244 bytes | VBA/__SRP_3 |
| A10 | 522 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 | CreateObject | May create an OLE object |
| Suspicious | CallByName | May attempt to obfuscate malicious function calls |
| 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 :
172
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
fdaad14f5c83320a913b69958e61343f9bf17f8b3a05baca81ae96da6abdedb5.xlsb
Verdict:
Malicious activity
Analysis date:
2021-12-20 18:07:38 UTC
Tags:
macros macros-on-open trojan rat remcos
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
File type:
application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
Has a screenshot:
False
Contains macros:
True
Detection:
Remcos
Result
Verdict:
Malware
Maliciousness:
Behaviour
Searching for the window
DNS request
Creating a window
Сreating synchronization primitives
Creating a process with a hidden window
Launching a process
Launching a process by exploiting the app vulnerability
Result
Verdict:
Malicious
File Type:
Excel File with Macro
Document image
Image:
Verdict:
Malicious
Threat level:
10/10
Confidence:
100%
Tags:
macros macros-on-open powershell wscript
Result
Verdict:
MALICIOUS
Link:
Details
CreateObject Obfuscation
Detected an attempt to invoke CreateObject() with an obfuscated string.
Macro with Startup Hook
Detected macro logic that will automatically execute on document open. Most malware contains some execution hook.
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:
Unknown
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Signature
Document contains an embedded VBA macro with suspicious strings
Document exploit detected (process start blacklist hit)
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: Microsoft Office Product Spawning Windows Shell
Sigma detected: Suspicious PowerShell Cmdline
Sigma detected: Suspicious Script Execution From Temp Folder
Sigma detected: WScript or CScript Dropper
Suspicious powershell command line found
System process connects to network (likely due to code injection or exploit)
Uses ping.exe to check the status of other devices and networks
Very long command line found
Writes or reads registry keys via WMI
Writes registry values via WMI
Wscript starts Powershell (via cmd or directly)
Behaviour
Behavior Graph:
Threat name:
Document-Office.Dropper.SDrop
Status:
Malicious
First seen:
2021-12-21 08:12:25 UTC
File Type:
Document
Extracted files:
28
AV detection:
17 of 43 (39.53%)
Threat level:
3/5
Detection(s):
Suspicious file
Result
Malware family:
remcos
Score:
10/10
Tags:
family:remcos botnet:note macro rat
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies Internet Explorer settings
Modifies registry class
Runs ping.exe
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
Suspicious use of SetThreadContext
Loads dropped DLL
Blocklisted process makes network request
Process spawned unexpected child process
Remcos
Malware Config
C2 Extraction:
trapboijiggy.dvrlists.com:54614
Malware family:
Remcos
Verdict:
Malicious
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
File information
The table below shows additional information about this malware sample such as delivery method and external references.
Malspam
Delivery method
Distributed via e-mail attachment
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