MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c4a1a8af4c1336e8e69e1914959cbf3bc4bfe5221639a163244d19fd60e8af19. 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: 12


Intelligence 12 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: c4a1a8af4c1336e8e69e1914959cbf3bc4bfe5221639a163244d19fd60e8af19
SHA3-384 hash: ff33482281848972951acc16e7e7f52d68ad833fae9a809aaa314a6b8a0cfe5b21bc926727c033e4e77dddd294ef4d6d
SHA1 hash: 20b172d83dcdb9974b8e222f14ea1e48eeccbfbe
MD5 hash: 12f1f8b544a44c9e417a7265a4c02a4c
humanhash: twenty-wisconsin-fruit-princess
File name:OFFER REQUEST.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:356'880 bytes
First seen:2023-06-08 07:15:31 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 1f23f452093b5c1ff091a2f9fb4fa3e9 (276 x GuLoader, 37 x RemcosRAT, 23 x AgentTesla)
ssdeep 6144:tIw3EwpCED/b1Myi5LQyUXme7HkSv7QFkMaTfKSzRm9C42+krMwUuDP:Aob1MyaQLmesdhgRmIdgyz
Threatray 894 similar samples on MalwareBazaar
TLSH T11474125875A5C22BEB6B4F704A66E73A3DB0DF82185051072B31FB2EBD727D0851F285
TrID 47.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
15.9% (.EXE) Win64 Executable (generic) (10523/12/4)
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) (4505/5/1)
File icon (PE):PE icon
dhash icon d801f098e4609944 (3 x GuLoader, 1 x RemcosRAT)
Reporter malwarelabnet
Tags:exe GuLoader remcos RemcosRAT signed

Code Signing Certificate

Organisation:
Issuer:
Algorithm:sha256WithRSAEncryption
Valid from:2023-04-03T03:39:08Z
Valid to:2026-04-02T03:39:08Z
Serial number: 228d2bd7c6f50b997b4030bc0b00790f472eda7d
Thumbprint Algorithm:SHA256
Thumbprint: c1fbd9c62df535e95b1c25834b6a6cd3fef8bc12c96f1a41cf557b24a81a438d
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
1
# of downloads :
292
Origin country :
CA CA
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
OFFER REQUEST.exe
Verdict:
Malicious activity
Analysis date:
2023-06-08 07:17:27 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/50532af2-0e5e-4012-8faf-e85750ff7c1e

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/396810/
Detection(s):
SecuriteInfo.com.Trojan.GenericKD.67410514.18094.31152.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a file in the %temp% directory
Creating a window
Creating a file in the %AppData% subdirectories
Searching for the window
Creating a file
Sending a custom TCP request
Delayed reading of the file
Result
Malware family:
n/a
Score:
  5/10
Tags:
n/a
Link:
https://dragonfly.certego.net/analysis/89912/overview
Behaviour
MalwareBazaar
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
lolbin overlay packed shell32.dll
Link:
https://www.filescan.io/uploads/648180368237763a9bd67579/reports/c44ab3c5-cffb-4ae7-96e7-934fee07ae39/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/c4a1a8af4c1336e8e69e1914959cbf3bc4bfe5221639a163244d19fd60e8af19
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:
Unknown
Link:
https://analyze.intezer.com/analyses/9cba5e5e-4614-4cdf-9232-754311959386
Result
Threat name:
GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
80 / 100
Link:
https://www.joesandbox.com/analysis/1250942
Signature
Creates autostart registry keys with suspicious names
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sample is not signed and drops a device driver
Tries to detect Any.run
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 883958 Sample: OFFER_REQUEST.exe Startdate: 08/06/2023 Architecture: WINDOWS Score: 80 36 googlehosted.l.googleusercontent.com 2->36 38 drive.google.com 2->38 40 doc-14-8k-docs.googleusercontent.com 2->40 46 Multi AV Scanner detection for submitted file 2->46 48 Yara detected GuLoader 2->48 50 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 2->50 8 OFFER_REQUEST.exe 3 39 2->8         started        12 ssc.exe 23 2->12         started        14 ssc.exe 14 2->14         started        16 ssc.exe 14 2->16         started        signatures3 process4 file5 32 C:\Users\user\AppData\Local\...\System.dll, PE32 8->32 dropped 56 Tries to detect Any.run 8->56 58 Sample is not signed and drops a device driver 8->58 18 OFFER_REQUEST.exe 2 9 8->18         started        34 C:\Users\user\AppData\Local\...\System.dll, PE32 12->34 dropped 23 WerFault.exe 21 12->23         started        25 WerFault.exe 21 12->25         started        signatures6 process7 dnsIp8 42 drive.google.com 142.250.186.142, 443, 50128 GOOGLEUS United States 18->42 44 googlehosted.l.googleusercontent.com 142.250.186.97, 443, 50129 GOOGLEUS United States 18->44 30 C:\Users\user\AppData\Roaming\ssc.exe, PE32 18->30 dropped 52 Creates autostart registry keys with suspicious names 18->52 54 Tries to detect Any.run 18->54 27 ssc.exe 14 18->27         started        file9 signatures10 process11 signatures12 60 Multi AV Scanner detection for dropped file 27->60
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/c4a1a8af4c1336e8e69e1914959cbf3bc4bfe5221639a163244d19fd60e8af19/
Threat name:
Win32.Trojan.Guloader
Create hunting rule
Status:
Malicious
First seen:
2023-06-06 14:50:09 UTC
File Type:
PE (Exe)
Extracted files:
6
AV detection:
15 of 37 (40.54%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ysq2rl2mcm3orzu6dekjlhf7hpcl7zjccy42cyzejum72yhiv4mq._file
Verdict:
unknown
Similar samples:
07079c49949ed4619204d3b640c590e102156526e9796c4966ead639b992385d
RemcosRAT
153fb690a1f464ba3a1c37d1d8d103010a54a00bd10eb86ead709e275dc5d302
RemcosRAT
18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83
RemcosRAT
2b1f9072d11a6ac9170cb1ef608dfd7369f63639cb78296f7643fce2b4192a7a
RemcosRAT
53cd75c785b440cbc32ded5c23144e59ec2d910618f3733dff686cefb699310c
RemcosRAT
6ab1444d305f5a3ffafd05cadd42ac71f058ad19257f67b0210d847848b8a06e
RemcosRAT
ab1f192fb8f916dcd581face8064290632cc84049382de572156f4538cdec085
RemcosRAT
dfd5aecc6088baf366549e3a7a163c0a7dec356ff6efaab012408cdb42eb2a94
RemcosRAT
+ 884 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:guloader family:remcos botnet:babynwahost discovery downloader persistence rat
Link:
https://tria.ge/reports/230608-h3sw4adf4s/
Behaviour
Suspicious behavior: MapViewOfSection
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Adds Run key to start application
Checks installed software on the system
Legitimate hosting services abused for malware hosting/C2
Checks QEMU agent file
Checks computer location settings
Executes dropped EXE
Loads dropped DLL
Guloader,Cloudeye
Remcos
Malware Config
C2 Extraction:
callito2024.sytes.net:2097
Unpacked files
SH256 hash:
f004c568d305cd95edbd704166fcd2849d395b595dff814bcc2012693527ac37
MD5 hash:
8b3830b9dbf87f84ddd3b26645fed3a0
SHA1 hash:
223bef1f19e644a610a0877d01eadc9e28299509
Link:
https://www.unpac.me/results/2478cca6-2832-46ad-81d1-2775cea5ef4a/
SH256 hash:
c4a1a8af4c1336e8e69e1914959cbf3bc4bfe5221639a163244d19fd60e8af19
MD5 hash:
12f1f8b544a44c9e417a7265a4c02a4c
SHA1 hash:
20b172d83dcdb9974b8e222f14ea1e48eeccbfbe
Link:
https://www.unpac.me/results/2478cca6-2832-46ad-81d1-2775cea5ef4a/
Malware family:
GuLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/c4a1a8af4c13/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
GuLoader
Score:
0.90
Link:
https://yomi.yoroi.company/submissions/c4a1a8af4c1336e8e69e1914959cbf3bc4bfe5221639a163244d19fd60e8af19

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:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:PE_Potentially_Signed_Digital_Certificate
Create hunting rule
Author:albertzsigovits

File information

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

Cape
Cape
https://www.capesandbox.com/analysis/396810/

Comments