MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e. 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: 15


Intelligence 15 IOCs YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e
SHA3-384 hash: 547692b8bfb39120f588ab321ecadb361bb3d97ea94821acb16355c80c8641e836aa1f0ecc928223997bf479cc38b5a2
SHA1 hash: ad2822fc0804fad19c1d959f02c0011d80a7ab4c
MD5 hash: 1c2a46d46812b1424ad44ac59b4c8d9a
humanhash: social-one-eight-kilo
File name:REF 220-331.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:884'224 bytes
First seen:2024-09-15 10:21:23 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'661 x AgentTesla, 19'474 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 24576:D1YaXjYr93cjbHRtEmWHs7FK5WQSDndP:D13MrhcjbHRWmh7c5MDdP
Threatray 4'285 similar samples on MalwareBazaar
TLSH T1CD1512A831A19703E5DA2BBA0585C17003B5EDBFA622E76B9FD94CFF7D90B144C00667
TrID 71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.2% (.EXE) Win64 Executable (generic) (10523/12/4)
6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.3% (.EXE) Win32 Executable (generic) (4504/4/1)
2.0% (.ICL) Windows Icons Library (generic) (2059/9)
Magika pebin
File icon (PE):PE icon
dhash icon c412f1d0ccf010c8 (2 x Formbook, 2 x SnakeKeylogger, 1 x RemcosRAT)
Reporter threatcat_ch
Tags:exe RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
438
Origin country :
CH CH
Vendor Threat Intelligence
Detection(s):
SecuriteInfo.com.Win32.MalwareX-gen.29885.32014.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
99.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=66e6b54c2ebf76853bd5c93b
Tags:
Discovery Execution Infostealer Network Stealth Remcos
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
packed remcos
Link:
https://www.filescan.io/uploads/66e6b54b0883d6a903eb344d/reports/5239f888-064a-43fd-b060-18e1cd63f247/overview
Verdict:
Malicious
Labled as:
Malware
Link:
https://www.hybrid-analysis.com/sample/b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e
Result
Verdict:
UNKNOWN
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Malware family:
REMCOS
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/27c882ba-21ca-4d88-ad05-bef520687693
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
rans.troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1511420
Signature
.NET source code contains potential unpacker
Adds a directory exclusion to Windows Defender
AI detected suspicious sample
C2 URLs / IPs found in malware configuration
Contains functionality to register a low level keyboard hook
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Contains functionalty to change the wallpaper
Delayed program exit found
Found malware configuration
Loading BitLocker PowerShell Module
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Sigma detected: Scheduled temp file as task from temp location
Suricata IDS alerts for network traffic
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AntiVM3
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1511420 Sample: REF 220-331.exe Startdate: 15/09/2024 Architecture: WINDOWS Score: 100 42 geoplugin.net 2->42 50 Multi AV Scanner detection for domain / URL 2->50 52 Suricata IDS alerts for network traffic 2->52 54 Found malware configuration 2->54 56 12 other signatures 2->56 8 fBvNwiRO.exe 5 2->8         started        11 REF 220-331.exe 7 2->11         started        signatures3 process4 file5 58 Multi AV Scanner detection for dropped file 8->58 60 Contains functionalty to change the wallpaper 8->60 62 Machine Learning detection for dropped file 8->62 66 4 other signatures 8->66 14 schtasks.exe 1 8->14         started        16 fBvNwiRO.exe 8->16         started        34 C:\Users\user\AppData\Roaming\fBvNwiRO.exe, PE32 11->34 dropped 36 C:\Users\...\fBvNwiRO.exe:Zone.Identifier, ASCII 11->36 dropped 38 C:\Users\user\AppData\Local\...\tmp4DA0.tmp, XML 11->38 dropped 40 C:\Users\user\AppData\...\REF 220-331.exe.log, ASCII 11->40 dropped 64 Adds a directory exclusion to Windows Defender 11->64 18 powershell.exe 23 11->18         started        21 REF 220-331.exe 2 13 11->21         started        24 schtasks.exe 1 11->24         started        signatures6 process7 dnsIp8 26 conhost.exe 14->26         started        48 Loading BitLocker PowerShell Module 18->48 28 WmiPrvSE.exe 18->28         started        30 conhost.exe 18->30         started        44 172.93.220.148, 45682, 49733 XTOM-AS-JPxTomJP United States 21->44 46 geoplugin.net 178.237.33.50, 49734, 80 ATOM86-ASATOM86NL Netherlands 21->46 32 conhost.exe 24->32         started        signatures9 process10
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e/
Threat name:
ByteCode-MSIL.Spyware.Negasteal
Create hunting rule
Status:
Malicious
First seen:
2024-09-15 10:22:12 UTC
File Type:
PE (.Net Exe)
Extracted files:
9
AV detection:
19 of 24 (79.17%)
Threat level:
  2/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=wpaij6p5l7qyckmxrtgpnuwsvsls2xd5wottpa3si5xvgxgbnoha._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
3f2491926888db2c9d6c7b1a426ff41e1cd4a13bc922156a814b9fe3032ff809
RemcosRAT
4e1899294fcd9043ed50cb9f02a7085b4c243deb30e3c2d5bdaeac2569fe0e6e
RemcosRAT
6f19b81c0a43cadb5d5447e3dc0485c04fd400d4a0656ff4af092ab9faac7213
RemcosRAT
932f8408820168efa7e334cbd4c0222eff4296b326e8d25196d998c2168979a7
RemcosRAT
d1b50fc6ce79320a88defef33baf6a51e30845bd13ab2b52f7925ba0b8f527cd
RemcosRAT
+ 4'275 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:3456789 discovery execution rat
Link:
https://tria.ge/reports/240915-md8ngazbjn/
Behaviour
Scheduled Task/Job: Scheduled Task
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Checks computer location settings
Command and Scripting Interpreter: PowerShell
Remcos
Malware Config
C2 Extraction:
172.93.220.148:45682
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/60bbd839-2cd1-49a5-9b95-85de9cffd64b
Unpacked files
SH256 hash:
1b727719d548c93b677a6e55184ae74bc4a85e2e217289634f563516327e8c0d
MD5 hash:
f971f6bb7308654f0013bfc2622b5399
SHA1 hash:
ddca047095e2c0160bed312c9447f74b729bd111
Link:
https://www.unpac.me/results/9a30b0c0-699a-444e-944f-e60784c66954/
Parent samples :
67f4b6cba186520b5247fa0ec23e129dd20c51640662108c2b9db61cf968f17d
bc5ee788c33389a426c9b5b10405a41a83f6875864bf09b0de6df15ab88cfbda
3bd3c438394939146b7e081e05cd0973bcc7c7d01f624502f70ff7f7da986a41
SH256 hash:
0f279dfe9b01caa24ed7f48a45f50244d85badfa7b94d84cfcc4c4434b58f556
MD5 hash:
a0ccbf5c76c41e0a4a7e507fbc4c0164
SHA1 hash:
6299ece4d08b7d98f3273da8f7087d586a7a0e58
Detections:
SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24
Create hunting rule
SUSP_OBF_NET_Reactor_Indicators_Jan24
Create hunting rule
Link:
https://www.unpac.me/results/9a30b0c0-699a-444e-944f-e60784c66954/
SH256 hash:
8b57a0bf569967168f71c65a9a3fea76d712a114ed75bbf2b5fe50009cef7b1d
MD5 hash:
e14b56671ab9359a74544abff82db87e
SHA1 hash:
06f995c44f40d2655cb00f753a791421896e107e
Detections:
Remcos
Create hunting rule
win_remcos_auto
Create hunting rule
win_remcos_w0
Create hunting rule
malware_windows_remcos_rat
Create hunting rule
Link:
https://www.unpac.me/results/9a30b0c0-699a-444e-944f-e60784c66954/
Parent samples :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 hash:
b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e
MD5 hash:
1c2a46d46812b1424ad44ac59b4c8d9a
SHA1 hash:
ad2822fc0804fad19c1d959f02c0011d80a7ab4c
Link:
https://www.unpac.me/results/9a30b0c0-699a-444e-944f-e60784c66954/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b3c084f9fd5f/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e

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:NET
Create hunting rule
Author:malware-lu
Rule name:NETexecutableMicrosoft
Create hunting rule
Author:malware-lu
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Malspam

RemcosRAT

Executable exe b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e

(this sample)

  
Delivery method
Distributed via e-mail attachment

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings
IDTitleSeverity
CHECK_AUTHENTICODEMissing Authenticodehigh
CHECK_DLL_CHARACTERISTICSMissing dll Security Characteristics (HIGH_ENTROPY_VA)high

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