MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 12aac5d4158e47940eefe3ccea78ba7390872b2afedae626a9783b2ae2a76632. 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: 8


Intelligence 8 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 12aac5d4158e47940eefe3ccea78ba7390872b2afedae626a9783b2ae2a76632
SHA3-384 hash: 08261f479000e6b18b2ec0dc44cd8315adbbbc53b2c77c6f8541a288fa110345daafb16cfc9ef760ef0c19cf2a842250
SHA1 hash: d585de42fb8fc003041e9a8755240f6e991535d9
MD5 hash: bf59baaca04f43551735c34c1e512c01
humanhash: triple-muppet-west-speaker
File name:12aac5d4158e47940eefe3ccea78ba7390872b2afedae626a9783b2ae2a76632
Download: download sample
Signature GuLoader
Create hunting rule
File size:311'883 bytes
First seen:2022-12-06 11:44:03 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 3abe302b6d9a1256e6a915429af4ffd2 (271 x GuLoader, 38 x Formbook, 25 x Loki)
ssdeep 6144:LwH0/Od3kifytGAcguN76HboL307N3jf/soWCJ2ygR:d/SHDCuN7MU30pyCJ7u
TLSH T145641221B392DCA2E5854171CFF21BF4E1A1AC40F25564478B803F35FE7DB86C63A692
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)
Reporter adrian__luca
Tags:exe GuLoader

Intelligence

File Origin
# of uploads :
1
# of downloads :
168
Origin country :
HU HU
Vendor Threat Intelligence
Malware family:
guloader
Create hunting rule
ID:
1
File name:
12aac5d4158e47940eefe3ccea78ba7390872b2afedae626a9783b2ae2a76632
Verdict:
Malicious activity
Analysis date:
2022-12-06 11:43:51 UTC
Tags:
guloader
Link:
https://app.any.run/tasks/d36e9156-26bd-4687-a6fa-5f47ed030070

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/343385/
Detection(s):
SecuriteInfo.com.Adware.Downware.19579.26308.2454.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a window
Creating a file
Searching for the window
Creating a file in the %AppData% subdirectories
Creating a file in the %temp% subdirectories
Sending a custom TCP request
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
buer guloader overlay packed shell32.dll
Link:
https://www.filescan.io/uploads/638f2b419a505ad9423da258/reports/eeaf3ef4-c0a3-452c-a6dc-8ef02b9982d9/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.
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/e60a82cd-3b79-40fa-9a30-0c345d283edd
Result
Threat name:
GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
72 / 100
Link:
https://www.joesandbox.com/analysis/1128872
Signature
Multi AV Scanner detection for submitted file
Opens the same file many times (likely Sandbox evasion)
Tries to detect virtualization through RDTSC time measurements
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/12aac5d4158e47940eefe3ccea78ba7390872b2afedae626a9783b2ae2a76632/
Threat name:
Win32.Trojan.Guloader
Create hunting rule
Status:
Malicious
First seen:
2022-11-21 05:14:15 UTC
File Type:
PE (Exe)
Extracted files:
4
AV detection:
17 of 26 (65.38%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ckvmlvavrzdzidxp4pgou6f2ooiiokzk73nomjvjpa5svyvhmyza._file
Result
Malware family:
n/a
Score:
  7/10
Tags:
discovery
Link:
https://tria.ge/reports/221206-nv7ceaeb94/
Behaviour
Suspicious behavior: MapViewOfSection
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Drops file in Program Files directory
Drops file in Windows directory
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Checks installed software on the system
Legitimate hosting services abused for malware hosting/C2
Checks QEMU agent file
Loads dropped DLL
Unpacked files
SH256 hash:
a1390a78533c47e55cc364e97af431117126d04a7faed49390210ea3e89dd0e1
MD5 hash:
fbe295e5a1acfbd0a6271898f885fe6a
SHA1 hash:
d6d205922e61635472efb13c2bb92c9ac6cb96da
Link:
https://www.unpac.me/results/92346b74-bafd-4014-beac-3381766a36c0/
SH256 hash:
12aac5d4158e47940eefe3ccea78ba7390872b2afedae626a9783b2ae2a76632
MD5 hash:
bf59baaca04f43551735c34c1e512c01
SHA1 hash:
d585de42fb8fc003041e9a8755240f6e991535d9
Link:
https://www.unpac.me/results/92346b74-bafd-4014-beac-3381766a36c0/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Legit
Score:
0.23
Link:
https://yomi.yoroi.company/submissions/12aac5d4158e47940eefe3ccea78ba7390872b2afedae626a9783b2ae2a76632

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

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/343385/

Comments