MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b99cae7c7881a8462eb92f859f83a6e8ce45c97855dd5bba2acc1a6cdd73e140. 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 8 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b99cae7c7881a8462eb92f859f83a6e8ce45c97855dd5bba2acc1a6cdd73e140
SHA3-384 hash: 9bab04e3a2e14a0915fa46f44973836e76eb3ad801df24fb78c720caa6133ef2e8e6dffde63e49befdb4bd0deeb2eec9
SHA1 hash: 8216ba2969d2ca365fc4ab3d2b5e6ef3d321a89d
MD5 hash: 5663e68ff72b1162fa97c0c3ecd23a82
humanhash: timing-kansas-georgia-november
File name:b99cae7c7881a8462eb92f859f83a6e8ce45c97855dd5bba2acc1a6cdd73e140
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:1'469'952 bytes
First seen:2025-02-07 14:06:34 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 21371b611d91188d602926b15db6bd48 (70 x Formbook, 37 x AgentTesla, 20 x RemcosRAT)
ssdeep 24576:xiUmSB/o5d1ubcvPFjgEOt4HyayDtx7SnHop2RlrVgfhrn4KIKouOnAj:x/mU/ohubcvPeEadMHopOrmZr4FA
Threatray 324 similar samples on MalwareBazaar
TLSH T1DC652393BED0D859E276037DC0799CE06AD24A71CBA83F3A9350F76AB8353599007F19
TrID 39.1% (.EXE) UPX compressed Win32 Executable (27066/9/6)
38.3% (.EXE) Win32 EXE Yoda's Crypter (26569/9/4)
7.2% (.EXE) Win16 NE executable (generic) (5038/12/1)
6.5% (.EXE) Win32 Executable (generic) (4504/4/1)
2.9% (.EXE) OS/2 Executable (generic) (2029/13)
Magika pebin
File icon (PE):PE icon
dhash icon aae2f3e38383b629 (2'034 x Formbook, 1'183 x CredentialFlusher, 666 x AgentTesla)
Reporter adrian__luca
Tags:exe RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
330
Origin country :
HU HU
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
b99cae7c7881a8462eb92f859f83a6e8ce45c97855dd5bba2acc1a6cdd73e140
Verdict:
Malicious activity
Analysis date:
2025-02-07 13:50:56 UTC
Tags:
remcos rat
Link:
https://app.any.run/tasks/0259d5cb-1823-4a1a-b59c-4197d3a414c4

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Trojan.Win32.AgentTesla.13683.23123.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
96.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67a61669ab8a2d1c6bcd7e52
Tags:
nymeria 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:
Malicious
Labled as:
AIT:Trojan.Nymeria.6776;AIT:Trojan.Nymeria
Link:
https://www.hybrid-analysis.com/sample/b99cae7c7881a8462eb92f859f83a6e8ce45c97855dd5bba2acc1a6cdd73e140
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/debb9d39-d812-4fe1-ad1a-adadebad2a7b
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1609320
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Binary is likely a compiled AutoIt script file
C2 URLs / IPs found in malware configuration
Drops VBS files to the startup folder
Found API chain indicative of sandbox detection
Found malware configuration
Joe Sandbox ML detected suspicious sample
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: WScript or CScript Dropper
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
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1609320 Sample: ZvaFSwdT9E.exe Startdate: 07/02/2025 Architecture: WINDOWS Score: 100 69 192.210.150.26 AS-COLOCROSSINGUS United States 2->69 79 Found malware configuration 2->79 81 Malicious sample detected (through community Yara rule) 2->81 83 Antivirus / Scanner detection for submitted sample 2->83 85 9 other signatures 2->85 15 ZvaFSwdT9E.exe 3 2->15         started        19 wscript.exe 1 2->19         started        signatures3 process4 file5 67 C:\Users\user\AppData\Local\...\lecheries.exe, PE32 15->67 dropped 71 Binary is likely a compiled AutoIt script file 15->71 73 Found API chain indicative of sandbox detection 15->73 21 lecheries.exe 1 15->21         started        75 Windows Scripting host queries suspicious COM object (likely to drop second stage) 19->75 25 lecheries.exe 19->25         started        signatures6 process7 file8 65 C:\Users\user\AppData\...\lecheries.vbs, data 21->65 dropped 91 Antivirus detection for dropped file 21->91 93 Multi AV Scanner detection for dropped file 21->93 95 Binary is likely a compiled AutoIt script file 21->95 97 3 other signatures 21->97 27 lecheries.exe 21->27         started        30 lecheries.exe 25->30         started        signatures9 process10 signatures11 103 Binary is likely a compiled AutoIt script file 27->103 32 lecheries.exe 27->32         started        35 lecheries.exe 30->35         started        process12 signatures13 77 Binary is likely a compiled AutoIt script file 32->77 37 lecheries.exe 32->37         started        40 lecheries.exe 35->40         started        process14 signatures15 89 Binary is likely a compiled AutoIt script file 37->89 42 lecheries.exe 37->42         started        45 lecheries.exe 40->45         started        process16 signatures17 101 Binary is likely a compiled AutoIt script file 42->101 47 lecheries.exe 42->47         started        50 lecheries.exe 45->50         started        process18 signatures19 107 Binary is likely a compiled AutoIt script file 47->107 52 lecheries.exe 47->52         started        55 lecheries.exe 50->55         started        process20 signatures21 87 Binary is likely a compiled AutoIt script file 52->87 57 lecheries.exe 52->57         started        60 lecheries.exe 55->60         started        process22 signatures23 99 Binary is likely a compiled AutoIt script file 57->99 62 lecheries.exe 57->62         started        process24 signatures25 105 Binary is likely a compiled AutoIt script file 62->105
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/b99cae7c7881a8462eb92f859f83a6e8ce45c97855dd5bba2acc1a6cdd73e140
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b99cae7c7881a8462eb92f859f83a6e8ce45c97855dd5bba2acc1a6cdd73e140/
Threat name:
Win32.Trojan.AutoitInject
Create hunting rule
Status:
Malicious
First seen:
2025-01-16 13:15:09 UTC
File Type:
PE (Exe)
Extracted files:
50
AV detection:
20 of 24 (83.33%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=xgok47dyqguemlvzf6cz7a5g5dhelslykxovxorkzqngzxlt4faa._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
unknown_loader_036
Create hunting rule
Similar samples:
08636b2005b38ded72accd100f22051c9ab9e5e072a003af09982affca769771
RemcosRAT
0d9239013e7f6fab8aab618ce46b5225d0283da9f81d937cae7a3988a127f879
RemcosRAT
11a7a04235fb2d756e8c3211f65c19d889029b863cda3a31fa4e9b281eec83ce
RemcosRAT
3aa746d45a8db14fb49d2fddd2141a8c41919fd262ef07140f2bb73e77e53147
RemcosRAT
43a538ef95d4f931704d6309fa0a292f38abaeae48836f39115c0d3f4418fdec
RemcosRAT
6455edf671362bff99424c329856d1c28b02ed39c45dad8cfa2fda18e9ae236c
RemcosRAT
780eb8a7854cce92caadc3f3fd7532a87f91825a393fdc147762a968a06c4e6d
RemcosRAT
9fb29a4b049bf0752b4c116c4efa91625507e13ca3bc0a8eb68ee9d2347e487b
RemcosRAT
error
RemcosRAT
f0dd72c45946626cebbce21d47e79ba0cd8f15cf57cb5ae61d6ebdcb0b272ade
RemcosRAT
+ 314 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  7/10
Tags:
discovery upx
Link:
https://tria.ge/reports/250207-rfqmwstmas/
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
Verdict:
Informative
Tags:
remcos
YARA:
n/a
Link:
https://app.threat.zone/submission/27bc4a10-2c68-44be-8999-0f44d3589d3b
Unpacked files
SH256 hash:
b99cae7c7881a8462eb92f859f83a6e8ce45c97855dd5bba2acc1a6cdd73e140
MD5 hash:
5663e68ff72b1162fa97c0c3ecd23a82
SHA1 hash:
8216ba2969d2ca365fc4ab3d2b5e6ef3d321a89d
Link:
https://www.unpac.me/results/7a8d72dd-6a0a-4b0f-948d-9f8253de2283/
SH256 hash:
09747d62842a8185ec5a1d3866acebbca777d357176f7c8a5d03c79b9f00b2e3
MD5 hash:
81d3fab1ed56e364b67c2893e4a5e78e
SHA1 hash:
41489b6ee35363011e3ac655f7f78d7bd4f307bd
Detections:
win_remcos_w0
Create hunting rule
win_remcos_auto
Create hunting rule
Remcos
Create hunting rule
malware_windows_remcos_rat
Create hunting rule
win_remcos_rat_unpacked
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
Create hunting rule
Link:
https://www.unpac.me/results/7a8d72dd-6a0a-4b0f-948d-9f8253de2283/
Parent samples :
17a545082a45c4c219bd09093349cb12cafef84e37a8dd989b6382a434b89544
b99cae7c7881a8462eb92f859f83a6e8ce45c97855dd5bba2acc1a6cdd73e140
11a7a04235fb2d756e8c3211f65c19d889029b863cda3a31fa4e9b281eec83ce
SH256 hash:
07c51abd9bcc02b2a277334e8c469aa28fc8b811dc862bd6017bbdeb732d8474
MD5 hash:
5506138842ef31f84896cd96cdd1dbd8
SHA1 hash:
982946fa8aaba8b86e79e502107c593c17cc7d35
Detections:
AutoIT_Compiled
Create hunting rule
Link:
https://www.unpac.me/results/7a8d72dd-6a0a-4b0f-948d-9f8253de2283/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b99cae7c7881/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.84
Link:
https://yomi.yoroi.company/submissions/b99cae7c7881a8462eb92f859f83a6e8ce45c97855dd5bba2acc1a6cdd73e140

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:AutoIT_Compiled
Create hunting rule
Author:@bartblaze
Description:Identifies compiled AutoIT script (as EXE). This rule by itself does NOT necessarily mean the detected file is malicious.
Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:pe_detect_tls_callbacks
Create hunting rule
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.

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
CHECK_NXMissing Non-Executable Memory Protectioncritical
Reviews
IDCapabilitiesEvidence
AUTH_APIManipulates User AuthorizationADVAPI32.dll::GetAce
MULTIMEDIA_APICan Play MultimediaWINMM.dll::timeGetTime
WIN_BASE_APIUses Win Base APIKERNEL32.DLL::LoadLibraryA

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