MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 758eb853faa1eac3b6c524e03d23f816f0d10155dee4090b8fba05c5e8dc5713. 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: 12
| SHA256 hash: | 758eb853faa1eac3b6c524e03d23f816f0d10155dee4090b8fba05c5e8dc5713 |
|---|---|
| SHA3-384 hash: | 16be6dad12ba963947212a2d3ec6cb2e9367917103f6110b634938a0c148495327d6486065ec99963b15daa5e053704c |
| SHA1 hash: | 6a1d042abe07796c6f7b861d31bab3a3b491c8c6 |
| MD5 hash: | 4e8209cf66bd6682ad34310ff637faa7 |
| humanhash: | illinois-five-fourteen-maryland |
| File name: | IRS-eservice.exe |
| Download: | download sample |
| Signature | RemcosRAT |
| File size: | 804'115 bytes |
| First seen: | 2021-01-29 16:36:58 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | ea4e67a31ace1a72683a99b80cf37830 (70 x Formbook, 63 x GuLoader, 54 x Loki) |
| ssdeep | 12288:pYFy5AaLUvoFfMVo8Ie/9Tt6UWU65ffjOcw5RWgrlGiNu6v7l/0IeB:pY3XosXtc51NLOcw50Aldu6vxcHB |
| Threatray | 1'503 similar samples on MalwareBazaar |
| TLSH | E8050103EAF2DDB7C6F436FB015A35215E6D5E910CE13202BAACB588FEB3C52C955182 |
| Reporter |  abuse_ch |
| Tags: | exe IRS nVpn RAT RemcosRAT |
abuse_ch
Malspam distributing RemcosRAT:HELO: biz-dealer.info
Sending IP: 117.50.16.14
From: IRS <e-service@irs.com>
Subject: E-file Provider Services
Attachment: IRS-eservice.pdf.z (contains "IRS-eservice.exe")
RemcosRAT C2s:
ms60tzel1.ddns.net (194.5.97.232)
ms60tzel1.hopto.org (194.5.97.232)
Hosted on nVpn:
% Information related to '194.5.97.0 - 194.5.97.255'
% Abuse contact for '194.5.97.0 - 194.5.97.255' is 'abuse@privacyfirst.sh'
inetnum: 194.5.97.0 - 194.5.97.255
remarks: This prefix is assigned to The PRIVACYFIRST Project, which
remarks: operates infrastructure jointly used by various VPN service
remarks: providers. We have a very strong focus on privacy and freedom.
remarks: In case of abuse, we encourage all international law enforcement
remarks: agencies to get in touch with our abuse contact. Due to the fact
remarks: that we keep no logs of user activities and only share data when
remarks: it is legally required under our jurisdiction, it is very unlikely
remarks: for a demand of user information to be successful. Still, that
remarks: should not deter you from reaching out.
netname: PRIVACYFIRST-UK5
country: GB
admin-c: TPP15-RIPE
tech-c: TPP15-RIPE
org: ORG-TPP6-RIPE
mnt-by: PRIVACYFIRST-MNT
status: SUB-ALLOCATED PA
created: 2018-07-23T09:31:45Z
last-modified: 2020-08-26T17:48:55Z
source: RIPE
Intelligence
File Origin
# of uploads :
1
# of downloads :
215
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
IRS-eservice.exe
Verdict:
Malicious activity
Analysis date:
2021-01-29 15:06:14 UTC
Tags:
autoit rat remcos keylogger
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Remcos
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a file in the %temp% directory
Creating a window
Creating a process from a recently created file
DNS request
Connection attempt
Creating a file in the %AppData% subdirectories
Sending a UDP request
Unauthorized injection to a recently created process
Unauthorized injection to a recently created process by context flags manipulation
Setting a global event handler for the keyboard
Result
Threat name:
Remcos
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Signature
Contains functionality to capture and log keystrokes
Contains functionality to inject code into remote processes
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Detected Remcos RAT
Detected unpacking (overwrites its own PE header)
Found stalling execution ending in API Sleep call
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sample uses process hollowing technique
Sigma detected: Remcos
Uses dynamic DNS services
Writes to foreign memory regions
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Detection:
remcos
Threat name:
Win32.Trojan.Nymeria
Status:
Malicious
First seen:
2021-01-29 07:31:00 UTC
AV detection:
19 of 46 (41.30%)
Threat level:
5/5
Detection(s):
Malicious file
Verdict:
malicious
Label(s):
remcos
Similar samples:
+ 1'493 additional samples on MalwareBazaar
Result
Malware family:
remcos
Score:
10/10
Tags:
family:remcos ransomware rat
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Loads dropped DLL
Executes dropped EXE
Remcos
Malware Config
C2 Extraction:
ms60tzel1.hopto.org:24006
ms60tzel1.ddns.net:24006
ms60tzel1.ddns.net:24006
Unpacked files
SH256 hash:
1f19fafb005334841a353948f795f6c3e5097c634d44b7f21f796cad2908d838
MD5 hash:
02038f1dba34c3a409b8cb27a058a97e
SHA1 hash:
2be3ad1de02689d2504a455e95e09fd95d1d0bb3
Detections:
win_remcos_g0
win_remcos_auto
SH256 hash:
8cf5cf0efb072fac79a80001ad1fcaefc548ff159b57534e9f0331c8b1cdb3e2
MD5 hash:
5da5ad17cc53039f55fe216f897ef97f
SHA1 hash:
f563f00d68660dc1b5bcb62987c646be46c06c07
SH256 hash:
758eb853faa1eac3b6c524e03d23f816f0d10155dee4090b8fba05c5e8dc5713
MD5 hash:
4e8209cf66bd6682ad34310ff637faa7
SHA1 hash:
6a1d042abe07796c6f7b861d31bab3a3b491c8c6
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: | ach_RemcosRAT |
|---|---|
| Author: | abuse.ch |
| Rule name: | Chrome_stealer_bin_mem |
|---|---|
| Author: | James_inthe_box |
| Description: | Chrome in files like avemaria |
| Rule name: | INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer |
|---|---|
| Author: | ditekSHen |
| Description: | detects Windows exceutables potentially bypassing UAC using eventvwr.exe |
| Rule name: | Keylog_bin_mem |
|---|---|
| Author: | James_inthe_box |
| Description: | Contains Keylog |
| Rule name: | Parallax |
|---|---|
| Author: | @bartblaze |
| Description: | Identifies Parallax RAT. |
| Rule name: | Remcos |
|---|---|
| Author: | JPCERT/CC Incident Response Group |
| Description: | detect Remcos in memory |
| Rule name: | remcos_rat |
|---|---|
| Author: | jeFF0Falltrades |
| Rule name: | REMCOS_RAT_variants |
|---|
| Rule name: | win_remcos_auto |
|---|---|
| Author: | Felix Bilstein - yara-signator at cocacoding dot com |
| Description: | autogenerated rule brought to you by yara-signator |
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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