MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 43753d7fe1487c758cfebd575c0818b13ef5c3c278a0fa9539e04fe1a86553eb. 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: 16


Intelligence 16 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 43753d7fe1487c758cfebd575c0818b13ef5c3c278a0fa9539e04fe1a86553eb
SHA3-384 hash: 7e409a701c8e1e82ce3ef86103fe1cbb384e330431328a502a283633d9b847d05973dce7d698b193ba11adb6c3c10d70
SHA1 hash: ec792154e1d3ae828ae35e964a8f8f6306e47fb6
MD5 hash: b3a4f534d879266608a6e0d370344fb5
humanhash: steak-ink-louisiana-alanine
File name:RFQ NO. SEST-13405.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:686'161 bytes
First seen:2025-03-13 12:05:25 UTC
Last seen:2025-03-13 13:36:24 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 1f23f452093b5c1ff091a2f9fb4fa3e9 (274 x GuLoader, 36 x RemcosRAT, 23 x AgentTesla)
ssdeep 12288:Acpp+js+MnU4IIMZ2JjbQ9CdTCriV0Rc7ym+dPNAMLK:Acpp+YVbjMvCdGeV+cGm+bbLK
Threatray 1'288 similar samples on MalwareBazaar
TLSH T18BE401153B35F507E214A1749B51E6B82B78AE29182B8B0BF7E13FDF7A287439C19314
TrID 47.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
15.9% (.EXE) Win64 Executable (generic) (10522/11/4)
9.9% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
7.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
6.8% (.EXE) Win32 Executable (generic) (4504/4/1)
Magika pebin
dhash icon 64fcfefefcf8f872 (3 x RemcosRAT)
Reporter lowmal3
Tags:exe RemcosRAT

Intelligence

File Origin
# of uploads :
4
# of downloads :
421
Origin country :
DE DE
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
RFQ NO. SEST-13405.exe
Verdict:
Malicious activity
Analysis date:
2025-03-13 12:08:14 UTC
Tags:
rat remcos remote
Link:
https://app.any.run/tasks/d3e48bcc-1317-4be0-8a16-84f70670cda6

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Clean
Score:
89.3%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67d2d2593962f1a6f470ce61
Tags:
n/a
Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a file in the %temp% directory
Creating a window
Creating a file in the %AppData% subdirectories
Creating a file
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
blackhole installer microsoft_visual_cc overlay packed packer_detected
Link:
https://www.filescan.io/uploads/67d2ca39f8726576332fdc1f/reports/3f99bf2a-aa70-4cb3-bf0c-84597f4a9e0a/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/43753d7fe1487c758cfebd575c0818b13ef5c3c278a0fa9539e04fe1a86553eb
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.
Malware family:
Unlabeled
Create hunting rule
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/9c5342ac-0aa9-4364-b331-ebc3ae73373b
Result
Threat name:
Remcos, GuLoader
Create hunting rule
Detection:
malicious
Classification:
phis.troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1637260
Signature
Antivirus / Scanner detection for submitted sample
Detected Remcos RAT
Initial sample is a PE file and has a suspicious name
Installs a global keyboard hook
Joe Sandbox ML detected suspicious sample
Maps a DLL or memory area into another process
Multi AV Scanner detection for submitted file
Sample uses process hollowing technique
Sigma detected: Remcos
Suricata IDS alerts for network traffic
Switches to a custom stack to bypass stack traces
Tries to detect virtualization through RDTSC time measurements
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Instant Messenger accounts or passwords
Tries to steal Mail credentials (via file / registry access)
Tries to steal Mail credentials (via file registry)
Writes to foreign memory regions
Yara detected GuLoader
Yara detected Remcos RAT
Yara detected WebBrowserPassView password recovery tool
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1637260 Sample: RFQ NO. SEST-13405.exe Startdate: 13/03/2025 Architecture: WINDOWS Score: 100 29 geoplugin.net 2->29 45 Suricata IDS alerts for network traffic 2->45 47 Antivirus / Scanner detection for submitted sample 2->47 49 Multi AV Scanner detection for submitted file 2->49 51 8 other signatures 2->51 8 RFQ NO. SEST-13405.exe 34 2->8         started        signatures3 process4 file5 25 C:\Users\user\AppData\Local\...\System.dll, PE32 8->25 dropped 11 RFQ NO. SEST-13405.exe 4 15 8->11         started        process6 dnsIp7 31 204.10.160.190, 2404, 49692, 49693 UNREAL-SERVERSUS Canada 11->31 33 204.10.160.192, 49691, 80 UNREAL-SERVERSUS Canada 11->33 35 geoplugin.net 178.237.33.50, 49694, 80 ATOM86-ASATOM86NL Netherlands 11->35 27 C:\ProgramData\remcos\logs.dat, data 11->27 dropped 53 Detected Remcos RAT 11->53 55 Writes to foreign memory regions 11->55 57 Maps a DLL or memory area into another process 11->57 59 2 other signatures 11->59 16 recover.exe 2 11->16         started        19 recover.exe 1 11->19         started        21 recover.exe 1 11->21         started        23 recover.exe 11->23         started        file8 signatures9 process10 signatures11 37 Tries to steal Mail credentials (via file registry) 16->37 39 Tries to harvest and steal browser information (history, passwords, etc) 16->39 41 Tries to steal Instant Messenger accounts or passwords 19->41 43 Tries to steal Mail credentials (via file / registry access) 21->43
Score:
96%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/43753d7fe1487c758cfebd575c0818b13ef5c3c278a0fa9539e04fe1a86553eb
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/43753d7fe1487c758cfebd575c0818b13ef5c3c278a0fa9539e04fe1a86553eb/
Threat name:
Win32.Backdoor.Remcos
Create hunting rule
Status:
Malicious
First seen:
2025-03-13 08:55:49 UTC
File Type:
PE (Exe)
Extracted files:
12
AV detection:
19 of 38 (50.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=in2t277bjb6hldh6xvlvycaywe7plq6cpcqpvfjz4bh6dkdfkpvq._file
Verdict:
malicious
Label(s):
cloudeye
Create hunting rule
Similar samples:
006bf1bbcce9975a267a47c57b2418d136c87dcc0ad30a604e8fa8f99f74d568
RemcosRAT
66ba58b6f376d364df901fa40b8e78afa872dbcfbe079f3aa09829180a04ded2
RemcosRAT
7a55e4b3f800275bc0f7c00cd337d0dd83379ef845fce3fa55b86d68092c1b9c
RemcosRAT
b0af5e4fbe413f7f7f5d814e5f4c62815cf9df31316e3fa63a8a842245dec524
RemcosRAT
b1d80d80dfb9794c72e6c3a71aacf04fb353ba48c244488f4712f5cc20d5f831
RemcosRAT
bf10226e9ddcf64215ca45ede48c6a2d61fbfe2cb3e1cea7f0ebee38e6a3c707
RemcosRAT
cbad9ba64b1f3db537ea7d230e8d791a7d43308fb68b73989100517b157bf6b2
RemcosRAT
cf1bc0e51ec2afbec5cffa1cf38e5ddcb6f9ce3aec8b737a55c8700600aa8caa
RemcosRAT
error
RemcosRAT
+ 1'278 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:guloader family:remcos botnet:remotehost collection discovery downloader rat
Link:
https://tria.ge/reports/250313-n9r62astbs/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Accesses Microsoft Outlook accounts
Loads dropped DLL
Detected Nirsoft tools
NirSoft MailPassView
NirSoft WebBrowserPassView
Guloader family
Guloader,Cloudeye
Remcos
Remcos family
Malware Config
C2 Extraction:
204.10.160.190:2404
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/048dc54c-3958-439b-bd48-503095eaabb2
Unpacked files
SH256 hash:
a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7
MD5 hash:
75ed96254fbf894e42058062b4b4f0d1
SHA1 hash:
996503f1383b49021eb3427bc28d13b5bbd11977
Link:
https://www.unpac.me/results/3cbe4dce-ecfa-4af5-a599-56917759a539/
SH256 hash:
43753d7fe1487c758cfebd575c0818b13ef5c3c278a0fa9539e04fe1a86553eb
MD5 hash:
b3a4f534d879266608a6e0d370344fb5
SHA1 hash:
ec792154e1d3ae828ae35e964a8f8f6306e47fb6
Link:
https://www.unpac.me/results/3cbe4dce-ecfa-4af5-a599-56917759a539/
Malware family:
GuLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/43753d7fe148/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Remcos
Score:
0.90
Link:
https://yomi.yoroi.company/submissions/43753d7fe1487c758cfebd575c0818b13ef5c3c278a0fa9539e04fe1a86553eb

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: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)

File information

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

Malspam

RemcosRAT

Executable exe 43753d7fe1487c758cfebd575c0818b13ef5c3c278a0fa9539e04fe1a86553eb

(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
Reviews
IDCapabilitiesEvidence
COM_BASE_APICan Download & Execute componentsole32.dll::CoCreateInstance
SECURITY_BASE_APIUses Security Base APIADVAPI32.dll::AdjustTokenPrivileges
ADVAPI32.dll::SetFileSecurityW
SHELL_APIManipulates System ShellSHELL32.dll::ShellExecuteExW
SHELL32.dll::SHFileOperationW
SHELL32.dll::SHGetFileInfoW
WIN32_PROCESS_APICan Create Process and ThreadsKERNEL32.dll::CreateProcessW
ADVAPI32.dll::OpenProcessToken
KERNEL32.dll::CloseHandle
KERNEL32.dll::CreateThread
WIN_BASE_APIUses Win Base APIKERNEL32.dll::LoadLibraryExW
KERNEL32.dll::GetDiskFreeSpaceW
KERNEL32.dll::GetCommandLineW
WIN_BASE_IO_APICan Create FilesKERNEL32.dll::CopyFileW
KERNEL32.dll::CreateDirectoryW
KERNEL32.dll::CreateFileW
KERNEL32.dll::DeleteFileW
KERNEL32.dll::MoveFileExW
KERNEL32.dll::MoveFileW
WIN_BASE_USER_APIRetrieves Account InformationADVAPI32.dll::LookupPrivilegeValueW
WIN_REG_APICan Manipulate Windows RegistryADVAPI32.dll::RegCreateKeyExW
ADVAPI32.dll::RegDeleteKeyW
ADVAPI32.dll::RegOpenKeyExW
ADVAPI32.dll::RegQueryValueExW
ADVAPI32.dll::RegSetValueExW
WIN_USER_APIPerforms GUI ActionsUSER32.dll::AppendMenuW
USER32.dll::EmptyClipboard
USER32.dll::FindWindowExW
USER32.dll::OpenClipboard
USER32.dll::PeekMessageW
USER32.dll::CreateWindowExW

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