MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a1cd1ee683c8e33828cbad98b828a1d8048dfd10c3bba5f5f72abd64e7691d85. 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: 8


Intelligence 8 IOCs YARA 26 File information Comments
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SHA256 hash: a1cd1ee683c8e33828cbad98b828a1d8048dfd10c3bba5f5f72abd64e7691d85
SHA3-384 hash: f8fe4656f6eeb8b2af33c92f5e0cd990d06dac3c5e22adf51cab7aa1e323b5a0ede46cfd777c19da5bb156f14a098c7c
SHA1 hash: 0c5b86c31882b967dd11dbefd4d94d9f43208eaf
MD5 hash: 509397326dfd80033903ca2ff1be6de7
humanhash: alpha-enemy-four-batman
File name:Pemberitahuan_Transaksi.pdf.gz
Download: download sample
Signature RemcosRAT
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File size:921'159 bytes
First seen:2025-02-26 09:11:08 UTC
Last seen:Never
File type: gz
MIME type:application/gzip
ssdeep 24576:th4sIlrxZ8z6oVYRrVpuBsJGNrjjQw9mTzP2aqz0tyLsZO:XxIlVZ8z6oy3uBsJGRjjFgTD2wa
TLSH T1961533A03B71582B8BECAC0D14964E086FD456A21A8C21FA67EBCD1FB7D9FC7545C40D
Magika gzip
Reporter MAM
Tags:gz RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
91
Origin country :
ID ID
File Archive Information

This file archive contains 1 file(s), sorted by their relevance:

File name:Pemberitahuan_Transaksi.pdf.exe
File size:997'384 bytes
SHA256 hash: 1b8e6aed1e468008650e35a6442152c2a9a2aa6b75d4e93857e85642b0451368
MD5 hash: 0361173667a15dca6c63c12f74aa9228
MIME type:application/x-dosexec
Signature RemcosRAT
Vendor Threat Intelligence
Detection(s):
Sanesecurity.Malware.27281.GZipHeur.UNOFFICIAL
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Verdict:
Malicious
Score:
90.2%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67bedafda0fd713c335ceb2a
Tags:
underscore injection dropper micro
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
invalid-signature masquerade obfuscated obfuscated packed packed packer_detected signed vbnet
Link:
https://www.filescan.io/uploads/67bedabb3afc3763bec77268/reports/511d04f7-5872-4b10-88e1-a2c6dae24ec7/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/a1cd1ee683c8e33828cbad98b828a1d8048dfd10c3bba5f5f72abd64e7691d85
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.
Score:
94%
Verdict:
Malware
File Type:
ARCHIVE
Link:
https://malprob.io/report/a1cd1ee683c8e33828cbad98b828a1d8048dfd10c3bba5f5f72abd64e7691d85
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a1cd1ee683c8e33828cbad98b828a1d8048dfd10c3bba5f5f72abd64e7691d85/
Threat name:
ByteCode-MSIL.Backdoor.FormBook
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Status:
Malicious
First seen:
2025-02-26 09:11:16 UTC
File Type:
Binary (Archive)
Extracted files:
14
AV detection:
19 of 24 (79.17%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=uhgr5zudzdrtqkglvwmlqkfb3aci37iqyo52l5pxfk6wjz3jdwcq._file
Result
Malware family:
remcos
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Score:
  10/10
Tags:
family:remcos botnet:nom discovery rat
Link:
https://tria.ge/reports/250226-lawn3atrw4/
Behaviour
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Remcos
Remcos family
Malware Config
C2 Extraction:
meme.linkpc.net:3174
Please note that we are no longer able to provide a coverage score for Virus Total.

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:DebuggerCheck__API
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Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:golang_bin_JCorn_CSC846
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Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:iexplorer_remcos
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Author:iam-py-test
Description:Detect iexplorer being taken over by Remcos
Rule name:INDICATOR_KB_CERT_7c1118cbbadc95da3752c46e47a27438
Create hunting rule
Author:ditekSHen
Description:Detects executables signed with stolen, revoked or invalid certificates
Rule name:INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
Create hunting rule
Author:ditekSHen
Description:detects Windows exceutables potentially bypassing UAC using eventvwr.exe
Rule name:NET
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Author:malware-lu
Rule name:NETexecutableMicrosoft
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Author:malware-lu
Rule name:pe_detect_tls_callbacks
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Rule name:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:pe_imphash
Create hunting rule
Rule name:RANSOMWARE
Create hunting rule
Author:ToroGuitar
Rule name:Remcos
Create hunting rule
Author:kevoreilly
Description:Remcos Payload
Rule name:REMCOS_RAT_variants
Create hunting rule
Rule name:Skystars_Malware_Imphash
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Author:Skystars LightDefender
Description:imphash
Rule name:Sus_Obf_Enc_Spoof_Hide_PE
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Author:XiAnzheng
Description:Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP)
Rule name:ThreadControl__Context
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Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:Windows_Trojan_Remcos_b296e965
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Author:Elastic Security
Reference:https://www.elastic.co/security-labs/exploring-the-ref2731-intrusion-set
Rule name:win_remcos_auto
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Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.remcos.
Rule name:win_remcos_rat_unpacked
Create hunting rule
Author:Matthew @ Embee_Research
Description:Detects strings present in remcos rat Samples.
Rule name:win_remcos_w0
Create hunting rule
Author:Matthew @ Embee_Research
Description:Detects strings present in remcos rat Samples.
Rule name:yarahub_win_remcos_rat_unpacked_aug_2023
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Author:Matthew @ Embee_Research

File information

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

Malspam

RemcosRAT

gz a1cd1ee683c8e33828cbad98b828a1d8048dfd10c3bba5f5f72abd64e7691d85

(this sample)

RemcosRAT

Executable exe 1b8e6aed1e468008650e35a6442152c2a9a2aa6b75d4e93857e85642b0451368

  
Delivery method
Distributed via e-mail attachment
  
Dropping
SHA256 1b8e6aed1e468008650e35a6442152c2a9a2aa6b75d4e93857e85642b0451368
  
Dropping
MD5 0361173667a15dca6c63c12f74aa9228

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