MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a1ed46df50f5be3a6b3b291189d115bcccb9ea790a90f7c141a6e4169c0a0895. 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: 11


Intelligence 11 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a1ed46df50f5be3a6b3b291189d115bcccb9ea790a90f7c141a6e4169c0a0895
SHA3-384 hash: 52f7e09a3310e7383a69b040fe247026630e56849a86c2c17cc277caaac3eb3feba6b6814eab4d35c7f974afca0b2a06
SHA1 hash: 27ccdfe6a54a331d1499d477795fea73f19d49bf
MD5 hash: d34ee65fbff37415ead9401c76b7d145
humanhash: white-network-florida-california
File name:Hjortekalves.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:1'466'484 bytes
First seen:2023-11-03 07:33:48 UTC
Last seen:2023-11-03 09:19:39 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 671f2a1f8aee14d336bab98fea93d734 (182 x GuLoader, 4 x Formbook, 4 x RemcosRAT)
ssdeep 24576:eZmBzEHw+w3hlKlX233nFWKq8WucI+9vrc6NlrBe7pyIvR5V1e:6m3BB33ndcI+9vrcode1yWRP1e
TLSH T1556512D37E044DF7E8291130641B44A3AB356FBFE681193A3299FE2B4D7226B460E53D
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 70e4b2a9a9b2c071 (7 x GuLoader)
Reporter abuse_ch
Tags:exe GuLoader

Intelligence

File Origin
# of uploads :
2
# of downloads :
271
Origin country :
NL NL
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/457923/
Detection(s):
SecuriteInfo.com.Win32.Evo-gen.5245.16935.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a window
Creating a file in the %AppData% subdirectories
Creating a file in the %temp% subdirectories
Gathering data
Verdict:
Malicious
Threat level:
  10/10
Confidence:
89%
Tags:
control installer lolbin overlay packed shell32
Link:
https://www.filescan.io/uploads/6544a271b38131f117ad2f5d/reports/7960b9ee-e550-4e8b-9ae3-418515a5f536/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_70%
Link:
https://www.hybrid-analysis.com/sample/a1ed46df50f5be3a6b3b291189d115bcccb9ea790a90f7c141a6e4169c0a0895
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/a21129cb-5399-4af3-bf79-9bd71818ff5b
Result
Threat name:
GuLoader, FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1322152
Signature
Antivirus / Scanner detection for submitted sample
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Modifies the context of a thread in another process (thread injection)
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Yara detected FormBook
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1322152 Sample: Hjortekalves.exe Startdate: 09/10/2023 Architecture: WINDOWS Score: 100 42 googlehosted.l.googleusercontent.com 2->42 44 drive.google.com 2->44 46 2 other IPs or domains 2->46 54 Malicious sample detected (through community Yara rule) 2->54 56 Antivirus / Scanner detection for submitted sample 2->56 58 Multi AV Scanner detection for submitted file 2->58 60 2 other signatures 2->60 11 Hjortekalves.exe 54 2->11         started        signatures3 process4 file5 40 C:\Users\user\AppData\Local\...\System.dll, PE32 11->40 dropped 14 Hjortekalves.exe 6 11->14         started        process6 dnsIp7 48 drive.google.com 142.250.72.142, 443, 50031 GOOGLEUS United States 14->48 50 googlehosted.l.googleusercontent.com 172.217.12.129, 443, 50032 GOOGLEUS United States 14->50 66 Maps a DLL or memory area into another process 14->66 68 Queues an APC in another process (thread injection) 14->68 18 zAGagyyNYXdZcT.exe 14->18 injected signatures8 process9 signatures10 52 Sample uses process hollowing technique 18->52 21 systray.exe 18->21         started        process11 signatures12 62 Modifies the context of a thread in another process (thread injection) 21->62 64 Maps a DLL or memory area into another process 21->64 24 explorer.exe 124 21->24         started        26 explorer.exe 2 21->26 injected 28 zAGagyyNYXdZcT.exe 21->28 injected 30 2 other processes 21->30 process13 process14 32 WerFault.exe 24->32         started        34 WerFault.exe 21 26->34         started        36 WerFault.exe 28->36         started        38 WerFault.exe 30->38         started       
Score:
98%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/a1ed46df50f5be3a6b3b291189d115bcccb9ea790a90f7c141a6e4169c0a0895
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a1ed46df50f5be3a6b3b291189d115bcccb9ea790a90f7c141a6e4169c0a0895/
Threat name:
Win32.Trojan.GULoader
Create hunting rule
Status:
Malicious
First seen:
2023-10-09 10:59:48 UTC
File Type:
PE (Exe)
Extracted files:
17
AV detection:
17 of 38 (44.74%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=uhwunx2q6w7du2z3feiytuivxtglt2tzbkippqkbu3sbnhakbckq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Result
Malware family:
guloader
Create hunting rule
Score:
  10/10
Tags:
family:guloader downloader
Link:
https://tria.ge/reports/231103-jd4sqsfh98/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Legitimate hosting services abused for malware hosting/C2
Checks computer location settings
Loads dropped DLL
Guloader,Cloudeye
Unpacked files
SH256 hash:
7fb0f8d452fefaac789986b933df050f3d3e4feb8a8d9944ada995f572dcdca1
MD5 hash:
dd87a973e01c5d9f8e0fcc81a0af7c7a
SHA1 hash:
c9206ced48d1e5bc648b1d0f54cccc18bf643a14
Link:
https://www.unpac.me/results/663a7395-33d8-4acf-a80d-af0882bd59b8/
SH256 hash:
a1ed46df50f5be3a6b3b291189d115bcccb9ea790a90f7c141a6e4169c0a0895
MD5 hash:
d34ee65fbff37415ead9401c76b7d145
SHA1 hash:
27ccdfe6a54a331d1499d477795fea73f19d49bf
Link:
https://www.unpac.me/results/663a7395-33d8-4acf-a80d-af0882bd59b8/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.79
Link:
https://yomi.yoroi.company/submissions/a1ed46df50f5be3a6b3b291189d115bcccb9ea790a90f7c141a6e4169c0a0895

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:Ins_NSIS_Buer_Nov_2020_1
Create hunting rule
Author:Arkbird_SOLG
Description:Detect NSIS installer used for Buer loader
Rule name:shellcode
Create hunting rule
Author:nex
Description:Matched shellcode byte patterns

File information

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

Malspam

GuLoader

Executable exe a1ed46df50f5be3a6b3b291189d115bcccb9ea790a90f7c141a6e4169c0a0895

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/457923/

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