MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 28331e2705bf58bd76a9f8ba0f0a431b762eaf6e4284dbf12f1453dd3fecf281. 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: 17

Intelligence 17 IOCs YARA 4 File information Comments

SHA256 hash:	28331e2705bf58bd76a9f8ba0f0a431b762eaf6e4284dbf12f1453dd3fecf281
SHA3-384 hash:	37cf55a3d94a245a21d3d1b15ff73990818afae6601601c1722e940ce568bd077c319b63c5438ba29f6ad97a2d8fbeb0
SHA1 hash:	558828c2ead68ea5883655299a3f0bfad1981ae5
MD5 hash:	6f0604f8a16b94b61d714dfec11d0358
humanhash:	louisiana-saturn-lake-beryllium
File name:	6f0604f8a16b94b61d714dfec11d0358.exe
Download:	download sample
Signature	RemcosRAT Create hunting rule
File size:	885'760 bytes
First seen:	2024-12-08 08:17:00 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	fc6683d30d9f25244a50fd5357825e79 (92 x Formbook, 52 x AgentTesla, 23 x SnakeKeylogger)
ssdeep	24576:drl6kD68JmlotQfAVnxag+/zxRlk4t4p5G5wJm1wr:Zl328U2yfAVnsgSWpg5km
Threatray	212 similar samples on MalwareBazaar
TLSH	T199152352CDC1D923C9FD6B348036CD5009A93471AEA6272EC719E64FFC31347A85BB99
TrID	31.3% (.EXE) UPX compressed Win32 Executable (27066/9/6) 30.7% (.EXE) Win32 EXE Yoda's Crypter (26569/9/4) 12.1% (.EXE) Win64 Executable (generic) (10522/11/4) 7.6% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 5.8% (.EXE) Win16 NE executable (generic) (5038/12/1)
Magika	pebin
File icon (PE):
dhash icon	aae2f3e38383b629 (2'034 x Formbook, 1'183 x CredentialFlusher, 666 x AgentTesla)
Reporter	abuse_ch
Tags:	exe RemcosRAT

Intelligence

File Origin

# of uploads :

# of downloads :

433

Origin country :

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

6f0604f8a16b94b61d714dfec11d0358.exe

Verdict:

Malicious activity

Analysis date:

2024-12-08 08:21:34 UTC

Tags:

n/a

Link:

https://app.any.run/tasks/199926a0-beb0-4463-b2c0-b0197934a7d2

Note:

ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample

Detection(s):

SecuriteInfo.com.Trojan.AutoIt.1547.1258.18865.UNOFFICIAL

Verdict:

Malicious

Score:

99.9%

Link:

https://cyber-fortress.com/docs/result/index.php?id=6755560dfca9c44c249740e0

Tags:

autorun autoit

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a window

Creating a file in the %temp% directory

Creating a file

Creating a process from a recently created file

Сreating synchronization primitives

Connection attempt

Enabling autorun by creating a file

Verdict:

Likely Malicious

Threat level:

7.5/10

Confidence:

100%

Tags:

autoit compiled-script evasive fingerprint lolbin microsoft_visual_cc msconfig overlay packed packed packed packer_detected upx

Link:

https://www.filescan.io/uploads/67555606013bbc0840c1324e/reports/f7f40207-7c75-4b25-9bbb-171a2d79628b/overview

Verdict:

Malicious

Labled as:

AIT:Trojan.Nymeria.6626;AIT:Trojan.Nymeria

Link:

https://www.hybrid-analysis.com/sample/28331e2705bf58bd76a9f8ba0f0a431b762eaf6e4284dbf12f1453dd3fecf281

Result

Verdict:

MALICIOUS

Details

Windows PE Executable

Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/56de25df-7c56-4f79-94f9-79afd58e131e

Result

Threat name:

Remcos

Detection:

malicious

Classification:

rans.troj.spyw.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1570884

Signature

AI detected suspicious sample

Binary is likely a compiled AutoIt script file

C2 URLs / IPs found in malware configuration

Contains functionality to bypass UAC (CMSTPLUA)

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

Detected Remcos RAT

Drops VBS files to the startup folder

Found malware configuration

Machine Learning detection for dropped file

Machine Learning detection for sample

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for dropped file

Multi AV Scanner detection for submitted file

Sigma detected: Drops script at startup location

Sigma detected: Remcos

Sigma detected: WScript or CScript Dropper

Suricata IDS alerts for network traffic

Windows Scripting host queries suspicious COM object (likely to drop second stage)

Yara detected Remcos RAT

Yara detected UAC Bypass using CMSTP

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/28331e2705bf58bd76a9f8ba0f0a431b762eaf6e4284dbf12f1453dd3fecf281

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/28331e2705bf58bd76a9f8ba0f0a431b762eaf6e4284dbf12f1453dd3fecf281/

Threat name:

Win32.Trojan.AutoitInject

Status:

Malicious

First seen:

2024-12-06 23:37:04 UTC

File Type:

PE (Exe)

Extracted files:

AV detection:

21 of 38 (55.26%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=fazr4jyfx5ml25vj7c5a6csddn3c5l3oikcnx4jpcrj52p7m6kaq._file

Verdict:

malicious

Label(s):

remcos

unknown_loader_036

RemcosRAT

958e5d7947f48f2047ac3c595ee724a916c9969430731091ac1b9fcfaaf65d70

RemcosRAT

a555cf98c5fd83b3c3ce5369a1d25679f4f28fb37bffc0a96231acde8d430fff

RemcosRAT

dec26f7cc646acdff30d90fae8837623c70870ed0cc9020930f95b53b6b730db

RemcosRAT

e51f50b3f520e3de0f0916e0291ad093aa0c50f6c81010001ce5aa2aee88f7b0

RemcosRAT

error

RemcosRAT

+ 202 additional samples on MalwareBazaar

Result

Malware family:

remcos

Score:

10/10

Tags:

family:remcos botnet:remotehost discovery rat upx

Link:

https://tria.ge/reports/241208-j6p52ssrak/

Behaviour

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

Suspicious use of WriteProcessMemory

System Location Discovery: System Language Discovery

AutoIT Executable

UPX packed file

Drops startup file

Executes dropped EXE

Loads dropped DLL

Remcos

Remcos family

Malware Config

C2 Extraction:

192.210.150.26:8787

Verdict:

Malicious

Tags:

trojan Remcos

YARA:

SUSP_Imphash_Mar23_3

Link:

https://app.threat.zone/submission/5fbe86d2-f513-4cb4-9f09-744672bcba10

Unpacked files

SH256 hash:

e733a8c2d141d0f72c79aaaad24e969d973d8cfd3f5420317ebca3b641b41a34

MD5 hash:

2410611283e235584b813733370f153c

SHA1 hash:

e16a5cfc0f3ced20fe80c974d300936120b1c4d0

Detections:

AutoIT_Compiled

Link:

https://www.unpac.me/results/6d3087e8-5c8c-459f-ba60-87fe997495ae/

SH256 hash:

665cecbb82e0047fbfce4f8f09bea69415715f87be95b6721ba09ad10b531fea

MD5 hash:

e524310a02dfe470f2f9ad81fa30fd57

SHA1 hash:

5442b037e5aa5c965bdefcf9f0d5381d72013c44

Detections:

Remcos

win_remcos_auto

win_remcos_w0

malware_windows_remcos_rat

INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM

win_remcos_rat_unpacked

Link:

https://www.unpac.me/results/6d3087e8-5c8c-459f-ba60-87fe997495ae/

Parent samples :

4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87
49e8a1f12fb5202470604efe01c0d60949d20d302a76aed85b2a049e91266366
e51f50b3f520e3de0f0916e0291ad093aa0c50f6c81010001ce5aa2aee88f7b0
28331e2705bf58bd76a9f8ba0f0a431b762eaf6e4284dbf12f1453dd3fecf281
8c5312bbccde4babcfbcb4d079b6063cf023777affca10a479891833925d4118
4108277feb47e70ea76dea706b8a8e7ed1dc94575c1ed200e78073b4d97185a2
9c1047801b38650382f68beedae4bcbd47bba142abad7405cac530f4e09f47ee
199ab84d301b4914a7eb23a40a575e2622928e58d3672da79e43c77e453c4a3d

SH256 hash:

28331e2705bf58bd76a9f8ba0f0a431b762eaf6e4284dbf12f1453dd3fecf281

MD5 hash:

6f0604f8a16b94b61d714dfec11d0358

SHA1 hash:

558828c2ead68ea5883655299a3f0bfad1981ae5

Link:

https://www.unpac.me/results/6d3087e8-5c8c-459f-ba60-87fe997495ae/

Malware family:

Remcos

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/28331e2705bf/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/28331e2705bf58bd76a9f8ba0f0a431b762eaf6e4284dbf12f1453dd3fecf281

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:	SUSP_Imphash_Mar23_3 Create hunting rule
Author:	Arnim Rupp (https://github.com/ruppde)
Description:	Detects imphash often found in malware samples (Maximum 0,25% hits with search for 'imphash:x p:0' on Virustotal) = 99,75% hits
Reference:	Internal Research

Rule name:	Sus_Obf_Enc_Spoof_Hide_PE Create hunting rule
Author:	XiAnzheng
Description:	Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP)

Rule name:	UPXV200V290MarkusOberhumerLaszloMolnarJohnReiser Create hunting rule
Author:	malware-lu

Rule name:	upx_largefile Create hunting rule
Author:	k3nr9

File information

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

Web download

RemcosRAT

exe 28331e2705bf58bd76a9f8ba0f0a431b762eaf6e4284dbf12f1453dd3fecf281

(this sample)

URLhaus

https://urlhaus.abuse.ch/url/3335204/

Delivery method

Distributed via web download

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

ID	Title	Severity
CHECK_AUTHENTICODE	Missing Authenticode	high
CHECK_DLL_CHARACTERISTICS	Missing dll Security Characteristics (HIGH_ENTROPY_VA)	high
CHECK_NX	Missing Non-Executable Memory Protection	critical

Reviews

ID	Capabilities	Evidence
AUTH_API	Manipulates User Authorization	ADVAPI32.dll::GetAce
MULTIMEDIA_API	Can Play Multimedia	WINMM.dll::timeGetTime
WIN_BASE_API	Uses Win Base API	KERNEL32.DLL::LoadLibraryA
WIN_NETWORK_API	Supports Windows Networking	MPR.dll::WNetUseConnectionW

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