MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c37494daa1a9c3b20e3f19414e25907b598b45be7ae5486d144b28a98ade3aa3. 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


BlankGrabber


Vendor detections: 11


Intelligence 11 IOCs YARA 16 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: c37494daa1a9c3b20e3f19414e25907b598b45be7ae5486d144b28a98ade3aa3
SHA3-384 hash: c018562ede78656936c8fe19a938b42508149a0dbb54ea0c25598c765edc1fa025effc3b5e4dab095429ed2ff51420e2
SHA1 hash: 80eef1747c513e890d74a66efbc4422d1e254ca4
MD5 hash: d2204d06ef5e671818eff7e5f33bcaf0
humanhash: magnesium-utah-moon-beer
File name:efsui.exe
Download: download sample
Signature BlankGrabber
Create hunting rule
File size:8'178'186 bytes
First seen:2023-09-02 19:13:12 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 0b5552dccd9d0a834cea55c0c8fc05be (16 x LunaLogger, 16 x BlankGrabber, 8 x CrealStealer)
ssdeep 98304:1ezHqdVfB2R6yuT/9vUIdD9C+z3zO917vOTh+ezsNhCSpXq45S2zh/hQqDmlwvmX:1+QsMbT/9bvLz3S1bA32CSEeOqCZYPdu
Threatray 377 similar samples on MalwareBazaar
TLSH T1128633D9A2C10AF5E477C53EC2C28905CEB1752707B8CA8B07B4A2B51F1BAD48D7B752
TrID 90.1% (.CPL) Windows Control Panel Item (generic) (197083/11/60)
4.8% (.EXE) Win64 Executable (generic) (10523/12/4)
2.3% (.EXE) Win16 NE executable (generic) (5038/12/1)
0.9% (.EXE) OS/2 Executable (generic) (2029/13)
0.9% (.EXE) Generic Win/DOS Executable (2002/3)
Reporter smica83
Tags:BlankGrabber exe HUN

Intelligence

File Origin
# of uploads :
1
# of downloads :
340
Origin country :
HU HU
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
efsui.exe
Verdict:
Suspicious activity
Analysis date:
2023-09-02 19:14:27 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/dc6a009e-e032-4975-bbe3-5d7a48a16fd9

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/445742/
Detection(s):
SecuriteInfo.com.Win64.Evo-gen.15201.21252.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file in the %temp% subdirectories
Restart of the analyzed sample
Сreating synchronization primitives
Running batch commands
Creating a process with a hidden window
Creating a file
DNS request
Launching a process
Creating a process from a recently created file
Using the Windows Management Instrumentation requests
Searching for the window
Searching for synchronization primitives
Sending an HTTP GET request
Sending a custom TCP request
Reading critical registry keys
Creating a window
Launching the process to change network settings
Stealing user critical data
Adding an exclusion to Microsoft Defender
Gathering data
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
control expand greyware lolbin overlay packed
Link:
https://www.filescan.io/uploads/64f3897cb7dd6394f70ff742/reports/b186c1d6-fdbc-4147-86b8-dfae7a4a396f/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/c37494daa1a9c3b20e3f19414e25907b598b45be7ae5486d144b28a98ade3aa3
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:
Suspicious
Link:
https://analyze.intezer.com/analyses/a9d6845d-ec3d-40c3-ad5c-bf45138af27b
Result
Threat name:
Blank Grabber
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1302162
Signature
Adds a directory exclusion to Windows Defender
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
DLL reload attack detected
DLL side loading technique detected
Found malware configuration
Found many strings related to Crypto-Wallets (likely being stolen)
May check the online IP address of the machine
Modifies Windows Defender protection settings
Removes signatures from Windows Defender
Yara detected Blank Grabber
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1302162 Sample: efsui.exe Startdate: 02/09/2023 Architecture: WINDOWS Score: 100 81 Found malware configuration 2->81 83 Antivirus detection for URL or domain 2->83 85 Antivirus / Scanner detection for submitted sample 2->85 87 Yara detected Blank Grabber 2->87 10 efsui.exe 62 2->10         started        process3 file4 59 C:\Users\user\AppData\...\VCRUNTIME140.dll, PE32+ 10->59 dropped 61 C:\Users\user\AppData\Local\...\rarreg.key, ASCII 10->61 dropped 63 C:\Users\user\AppData\...\unicodedata.pyd, PE32+ 10->63 dropped 65 55 other files (none is malicious) 10->65 dropped 97 DLL reload attack detected 10->97 99 May check the online IP address of the machine 10->99 101 Modifies Windows Defender protection settings 10->101 103 2 other signatures 10->103 14 efsui.exe 1 10->14         started        signatures5 process6 dnsIp7 69 ip-api.com 208.95.112.1, 49728, 80 TUT-ASUS United States 14->69 71 blank-icrdy.in 14->71 67 C:\Users\user\AppData\Local\Temp\bound.exe, PE32+ 14->67 dropped 73 Found many strings related to Crypto-Wallets (likely being stolen) 14->73 75 Modifies Windows Defender protection settings 14->75 77 Adds a directory exclusion to Windows Defender 14->77 79 Removes signatures from Windows Defender 14->79 19 cmd.exe 1 14->19         started        22 cmd.exe 1 14->22         started        24 cmd.exe 1 14->24         started        26 3 other processes 14->26 file8 signatures9 process10 signatures11 89 Modifies Windows Defender protection settings 19->89 91 Adds a directory exclusion to Windows Defender 19->91 93 Removes signatures from Windows Defender 19->93 28 powershell.exe 18 19->28         started        30 conhost.exe 19->30         started        32 bound.exe 1 22->32         started        34 conhost.exe 22->34         started        36 powershell.exe 19 24->36         started        43 2 other processes 24->43 38 WMIC.exe 26->38         started        41 powershell.exe 19 26->41         started        45 4 other processes 26->45 process12 signatures13 47 cmd.exe 32->47         started        49 cmd.exe 32->49         started        51 conhost.exe 32->51         started        53 36 other processes 32->53 95 DLL side loading technique detected 38->95 process14 process15 55 taskkill.exe 47->55         started        57 taskkill.exe 49->57         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/c37494daa1a9c3b20e3f19414e25907b598b45be7ae5486d144b28a98ade3aa3/
Threat name:
Win64.Trojan.Generic
Create hunting rule
Status:
Suspicious
First seen:
2023-09-02 19:11:36 UTC
File Type:
PE+ (Exe)
Extracted files:
424
AV detection:
11 of 38 (28.95%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=yn2jjwvbvhb3edr7dfau4jmqpnmywrn6plsuq3iujmuktcw6hkrq._file
Verdict:
malicious
Similar samples:
1ccc641022b3e95b4eaa3339f8d980bf1b606ca8d4f529c98f8d7d2762515b85
BlankGrabber
2aecab4d8aabdedc75c03cfc858047dea40c2022430a282dac70b0b6a1d67947
BlankGrabber
3fae6735a44f901db80b039a624ec9658ef680e3606d14867b94b56bc1b0a9f6
BlankGrabber
5c3d5ec117294e5289b639dc5849a9a2f4eda9df688c324ec120eaae6e95415b
BlankGrabber
7efdd86bde8ebe7882d0de3f1a06444be741b9e7b748c2b1a6a2193d97bf431a
BlankGrabber
91c4fc7399536afef7e77c46cf58ab032bf47bae62c5a156631ec04a8d269bd8
BlankGrabber
9d0fbad002a0d52d8a7725ec88a93d3b2a85d7c919b5ab751085532436181edc
BlankGrabber
d4139f98ba668f982b8004ee094718a2e0451a4616b01f977ff883c6191c19f2
BlankGrabber
+ 367 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  7/10
Tags:
upx
Link:
https://tria.ge/reports/230902-xxmv8afb2w/
Behaviour
Enumerates processes with tasklist
Kills process with taskkill
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Executes dropped EXE
Loads dropped DLL
UPX packed file
Unpacked files
SH256 hash:
c37494daa1a9c3b20e3f19414e25907b598b45be7ae5486d144b28a98ade3aa3
MD5 hash:
d2204d06ef5e671818eff7e5f33bcaf0
SHA1 hash:
80eef1747c513e890d74a66efbc4422d1e254ca4
Link:
https://www.unpac.me/results/1355eae1-1af1-46d5-88cd-d8d09f972e3d/
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/c37494daa1a9c3b20e3f19414e25907b598b45be7ae5486d144b28a98ade3aa3

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:BLOWFISH_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for Blowfish constants
Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerException__ConsoleCtrl
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerException__SetConsoleCtrl
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:ldpreload
Create hunting rule
Author:xorseed
Reference:https://stuff.rop.io/
Rule name:MD5_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:PE_Potentially_Signed_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:reverse_http
Create hunting rule
Author:CD_R0M_
Description:Identify strings with http reversed (ptth)
Rule name:RIPEMD160_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:SEH__vectored
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:SHA1_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA1 constants
Rule name:SHA512_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA384/SHA512 constants
Rule name:upxHook
Create hunting rule
Author:@r3dbU7z
Description:Detect artifacts from 'upxHook' - modification of UPX packer
Reference:https://bazaar.abuse.ch/sample/6352be8aa5d8063673aa428c3807228c40505004320232a23d99ebd9ef48478a/
Rule name:vmdetect
Create hunting rule
Author:nex
Description:Possibly employs anti-virtualization techniques
Rule name:WHIRLPOOL_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for WhirlPool constants

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/445742/

Comments