MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b434e54b1f162ec9a1f9e943e8829069c8e91ff4998acdb6f0e5aa34ceee1cc4. 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


GuLoader


Vendor detections: 9


Intelligence 9 IOCs YARA File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b434e54b1f162ec9a1f9e943e8829069c8e91ff4998acdb6f0e5aa34ceee1cc4
SHA3-384 hash: a8f2702802368466ca68b5ed7070ce49d315b31eb9dfa432e4ccee24d930d84c48f507c35e7eb9930f4a355eb0f2d1a8
SHA1 hash: b208e1d04afe1e4dd9d13f2015eef83a91813fe3
MD5 hash: a7f4ebce0c80d8d84d34b2b5b616c00c
humanhash: saturn-idaho-ohio-kitten
File name:creditnote.xll
Download: download sample
Signature GuLoader
Create hunting rule
File size:987'648 bytes
First seen:2022-02-15 19:20:06 UTC
Last seen:Never
File type:Excel file xll
MIME type:application/x-dosexec
imphash 53e0abb1d2d83c9124293d124a46bccf (1 x GuLoader)
ssdeep 24576:wn35pPX1DBY4ZyrE7K3yt8PeVooA/lB2DePExV2wFEFueeOEibqy7r6rJ:oV2MNzNyqJ
Threatray 15 similar samples on MalwareBazaar
TLSH T1B625E0EB77CA7FA0E2BEC2B6C2F9892D56B370B35561A78A654041CD69113538D30B0F
Reporter ffforward
Tags:GuLoader remcos xll

Intelligence

File Origin
# of uploads :
1
# of downloads :
322
Origin country :
n/a
Vendor Threat Intelligence
Detection(s):
SecuriteInfo.com.Trojan.GenericKD.38980910.20523.25284.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malicious
File Type:
Office Add-Ins - Suspicious
Link:
https://app.docguard.net/b434e54b1f162ec9a1f9e943e8829069c8e91ff4998acdb6f0e5aa34ceee1cc4/results/dashboard
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
packed
Link:
https://www.filescan.io/uploads/620bfceaa2660f3bb9dd9cbe/reports/ad10d54b-919d-441f-9147-a2dc74fa88d1/overview
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.
Result
Threat name:
GuLoader Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/940303
Signature
C2 URLs / IPs found in malware configuration
Creates autostart registry keys with suspicious values (likely registry only malware)
Document exploit detected (creates forbidden files)
Document exploit detected (drops PE files)
Document exploit detected (process start blacklist hit)
Found malware configuration
Hides threads from debuggers
Multi AV Scanner detection for submitted file
Office process drops PE file
Performs DNS queries to domains with low reputation
Sigma detected: MS Office Product Spawning Exe in User Dir
Sigma detected: New RUN Key Pointing to Suspicious Folder
Tries to detect Any.run
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Yara detected GuLoader
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 572781 Sample: creditnote.xll Startdate: 15/02/2022 Architecture: WINDOWS Score: 100 48 top.nobullshyt1.xyz 2->48 50 oliveiraadvogadoscatanduva.adv.br 2->50 56 Found malware configuration 2->56 58 Multi AV Scanner detection for submitted file 2->58 60 Document exploit detected (drops PE files) 2->60 62 9 other signatures 2->62 9 cmd.exe 4 2 2->9         started        11 wscript.exe 2->11         started        signatures3 process4 process5 13 EXCEL.EXE 203 65 9->13         started        17 conhost.exe 9->17         started        19 stttevokals.exe 18 11->19         started        file6 44 C:\Users\user\...\AudioAppKEMCQKVIQY.exe, PE32 13->44 dropped 74 Document exploit detected (creates forbidden files) 13->74 21 AudioAppKEMCQKVIQY.exe 1 23 13->21         started        46 C:\Users\user\AppData\Local\...\System.dll, PE32 19->46 dropped 76 Tries to detect Any.run 19->76 78 Hides threads from debuggers 19->78 25 stttevokals.exe 7 19->25         started        signatures7 process8 file9 32 C:\Users\user\AppData\Local\Temp\zlib1.dll, PE32+ 21->32 dropped 34 C:\Users\user\AppData\Local\...\uninstall.exe, PE32 21->34 dropped 36 C:\Users\user\AppData\Local\...\System.dll, PE32 21->36 dropped 38 2 other files (none is malicious) 21->38 dropped 64 Creates autostart registry keys with suspicious values (likely registry only malware) 21->64 66 Tries to detect Any.run 21->66 68 Hides threads from debuggers 21->68 27 AudioAppKEMCQKVIQY.exe 2 9 21->27         started        signatures10 process11 dnsIp12 52 top.nobullshyt1.xyz 185.228.19.147, 10050, 49811 DEDIPATH-LLCUS Germany 27->52 54 oliveiraadvogadoscatanduva.adv.br 209.126.0.98, 443, 49810, 49816 CONTABOUS United States 27->54 40 C:\Users\user\AppData\...\stttevokals.exe, PE32 27->40 dropped 42 C:\Users\user\AppData\...\stttevokals.vbs, ASCII 27->42 dropped 70 Tries to detect Any.run 27->70 72 Hides threads from debuggers 27->72 file13 signatures14
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b434e54b1f162ec9a1f9e943e8829069c8e91ff4998acdb6f0e5aa34ceee1cc4/
Threat name:
Win64.Trojan.Generic
Create hunting rule
Status:
Suspicious
First seen:
2022-02-15 04:15:06 UTC
File Type:
PE+ (Dll)
Extracted files:
2
AV detection:
17 of 43 (39.53%)
Threat level:
  5/5
Verdict:
malicious
Similar samples:
1c7e66126306537a453d7a792978464aa8ad5ac2f34bd1fccfffe7e0b9c6d85c
GuLoader
1cbc8581430d4a524a0805f30ce5368340fc943635c76de083527446508027b1
GuLoader
30980176792fc176767dfd338ef7fd0b73f04b66cd63e1e3b0bbf485bc064ed4
GuLoader
882312787d62f8bbebd46a7ce54207ec7eced13335de9ce6ae75a0a1e52dcb09
GuLoader
bac03f9b60b043b72ae8548b8915dd6058c71b6beae23652389b0cb9310af91d
GuLoader
ce5c54ac577153e15fb793c022b54fb473752b876525111d6aac97369e72e85e
GuLoader
e01271da5d003c2c0c47314e9bf83fc66e2329c27e7febd768db1a4ecc45aedb
GuLoader
e8ec7dcf12edf07c6099157c32557f41ebd74ddee6b125d1e34dcc4259dc10a7
GuLoader
f62a1c42d31a2665f1fe2ecec1895645750529f6eb9ce4a3421439bd1bff3171
GuLoader
fc80f7f615d4130160c30ec1c8e4cd885a7f42978ead2509cfdd350ad3547882
GuLoader
+ 5 additional samples on MalwareBazaar
Result
Malware family:
guloader
Create hunting rule
Score:
  10/10
Tags:
family:guloader downloader persistence
Link:
https://tria.ge/reports/220215-x149nsaffk/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies Internet Explorer settings
Modifies data under HKEY_USERS
Modifies registry class
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Drops file in Windows directory
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Adds Run key to start application
Checks QEMU agent file
Loads dropped DLL
Executes dropped EXE
Guloader,Cloudeye
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/b434e54b1f162ec9a1f9e943e8829069c8e91ff4998acdb6f0e5aa34ceee1cc4

File information

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

  
URLhaus
https://urlhaus.abuse.ch/url/2044541/
  
Delivery method
Distributed via e-mail link

Comments