MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a2562e99d8118fcd1d9cd40b1811900664bb3bdd6de0caa5c1dfabd595091b66. 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: 12


Intelligence 12 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a2562e99d8118fcd1d9cd40b1811900664bb3bdd6de0caa5c1dfabd595091b66
SHA3-384 hash: 0bd2a7990b9d51355ba4889ad1422a26e7a8beea7e30c637ce1f5c0a8d2115945b9c5cdf4358e9ab4abe7d791f8eb835
SHA1 hash: 1e08473eddc5f998e9ac98e9edcb381e9a5b471b
MD5 hash: c55e2d1a636396d2c6e6ec01d339ae54
humanhash: six-september-tennessee-maine
File name:SWF310130709H10170_doc.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:417'704 bytes
First seen:2023-07-12 06:27:37 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash d4b94e8ee3f620a89d114b9da4b31873 (90 x GuLoader, 18 x njrat, 9 x RemcosRAT)
ssdeep 6144:0qaFH+9DAYmH76d3LCC2QMbg6RFKqSMBlFGObd6SN/hnanHy1FZiSGQsBzM:85lYe7euC2ZbXFKZmc86SRhnanHUX7
Threatray 1'720 similar samples on MalwareBazaar
TLSH T15594C0D3F400BA96F82EE63554F91EAE035F7D769869260E3A04FA621CF3503652790F
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 94bc3cbc3c1c98aa (1 x GuLoader, 1 x NanoCore)
Reporter abuse_ch
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:
Issuer:
Algorithm:sha256WithRSAEncryption
Valid from:2023-01-17T00:18:43Z
Valid to:2026-01-16T00:18:43Z
Serial number: 19e7d9662e5f703779c8acf291eb2fed149db191
Thumbprint Algorithm:SHA256
Thumbprint: d41d877b16fb9459497efae0806e34c998c22d9f4bc6a5a60bb0ed4667b34bf8
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
1
# of downloads :
260
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
SWF310130709H10170_doc.exe
Verdict:
Malicious activity
Analysis date:
2023-07-12 06:35:59 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/c4e3731c-c864-4421-8feb-4941ef107b45

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/416346/
Detection(s):
SecuriteInfo.com.Gen.Variant.Nemesis.25219.1650.24247.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Searching for the window
Creating a window
Creating a file in the %temp% subdirectories
Сreating synchronization primitives
Creating a file
Creating a file in the Windows subdirectories
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/97229/overview
Behaviour
MalwareBazaar
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
control lolbin masquerade overlay packed shell32
Link:
https://www.filescan.io/uploads/64ae47fa6e9f7019de9f7981/reports/9325a6e3-8704-4acf-8f15-2d083f0d50fe/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_90%
Link:
https://www.hybrid-analysis.com/sample/a2562e99d8118fcd1d9cd40b1811900664bb3bdd6de0caa5c1dfabd595091b66
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/0c456368-994a-423c-9dc8-36ed53a5827c
Result
Threat name:
GuLoader, FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1271578
Signature
C2 URLs / IPs found in malware configuration
Found malware configuration
Initial sample is a PE file and has a suspicious name
Machine Learning detection for 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)
Modifies the prolog of user mode functions (user mode inline hooks)
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Snort IDS alert for network traffic
System process connects to network (likely due to code injection or exploit)
Tries to detect Any.run
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Yara detected FormBook
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1271578 Sample: SWF310130709H10170_doc.exe Startdate: 12/07/2023 Architecture: WINDOWS Score: 100 32 www.xn--brstungsgelnder-blb21b.com 2->32 34 www.twytt.com 2->34 36 24 other IPs or domains 2->36 56 Snort IDS alert for network traffic 2->56 58 Found malware configuration 2->58 60 Malicious sample detected (through community Yara rule) 2->60 62 8 other signatures 2->62 11 SWF310130709H10170_doc.exe 8 45 2->11         started        signatures3 process4 file5 30 C:\Users\user\AppData\Local\...\System.dll, PE32 11->30 dropped 70 Tries to detect Any.run 11->70 15 SWF310130709H10170_doc.exe 6 11->15         started        signatures6 process7 dnsIp8 44 drive.google.com 142.250.185.78, 443, 49957 GOOGLEUS United States 15->44 46 googlehosted.l.googleusercontent.com 142.250.74.193, 443, 49958 GOOGLEUS United States 15->46 48 Modifies the context of a thread in another process (thread injection) 15->48 50 Tries to detect Any.run 15->50 52 Maps a DLL or memory area into another process 15->52 54 2 other signatures 15->54 19 explorer.exe 7 1 15->19 injected signatures9 process10 dnsIp11 38 theknowgame.com 15.197.142.173, 49968, 80 TANDEMUS United States 19->38 40 www.xn--brstungsgelnder-blb21b.com 217.160.0.100, 49963, 49974, 80 ONEANDONE-ASBrauerstrasse48DE Germany 19->40 42 9 other IPs or domains 19->42 64 System process connects to network (likely due to code injection or exploit) 19->64 23 colorcpl.exe 19->23         started        signatures12 process13 signatures14 66 Modifies the context of a thread in another process (thread injection) 23->66 68 Maps a DLL or memory area into another process 23->68 26 cmd.exe 1 23->26         started        process15 process16 28 conhost.exe 26->28         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a2562e99d8118fcd1d9cd40b1811900664bb3bdd6de0caa5c1dfabd595091b66/
Threat name:
Win32.Trojan.Guloader
Create hunting rule
Status:
Malicious
First seen:
2023-07-10 16:15:50 UTC
File Type:
PE (Exe)
Extracted files:
5
AV detection:
15 of 38 (39.47%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ujlc5goycgh42hm42qfrqemqazslwo65nxqmvjob36v5lfijdnta._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
cloudeye
Create hunting rule
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80fd67b02253b03398a151f7c5392adfb32ad43a619a18c3dd8e2e8a876e9139
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909735e8a902e299207563464959d2b7a8d3821e74cdb1aade9a17162c599e23
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bb5df98c2c7bc29973d2f2eeb67ce8b7a2f9da4166fabe5dfd70e5117e404991
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c1e64e86dd89a5820bbb518ead2176741f91d3bf5c579e154533d44e816c1f76
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f7bb2d35300a95c164089832c13410023d2293390130109ae3693fd0d05a3df8
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fef348f0a51720ef524010b7225f6d338e10654e4fc13f4a6b89b07deafd35f7
GuLoader
+ 1'710 additional samples on MalwareBazaar
Result
Malware family:
guloader
Create hunting rule
Score:
  10/10
Tags:
family:formbook family:guloader campaign:b04a discovery downloader rat spyware stealer trojan
Link:
https://tria.ge/reports/230712-g8cxdscb98/
Behaviour
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Drops file in Program Files directory
Drops file in Windows directory
Suspicious use of NtCreateThreadExHideFromDebugger
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
Deletes itself
Loads dropped DLL
Formbook payload
Formbook
Guloader,Cloudeye
Unpacked files
SH256 hash:
e94a1f7bcd7e0d532b660d0af468eb3321536c3efdca265e61f9ec174b1aef27
MD5 hash:
ee260c45e97b62a5e42f17460d406068
SHA1 hash:
df35f6300a03c4d3d3bd69752574426296b78695
Link:
https://www.unpac.me/results/5b2ff686-b79b-4d5c-ad97-87fe7596449c/
SH256 hash:
a2562e99d8118fcd1d9cd40b1811900664bb3bdd6de0caa5c1dfabd595091b66
MD5 hash:
c55e2d1a636396d2c6e6ec01d339ae54
SHA1 hash:
1e08473eddc5f998e9ac98e9edcb381e9a5b471b
Link:
https://www.unpac.me/results/5b2ff686-b79b-4d5c-ad97-87fe7596449c/
Malware family:
GuLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/a2562e99d811/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.

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

File information

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

Malspam

GuLoader

Executable exe a2562e99d8118fcd1d9cd40b1811900664bb3bdd6de0caa5c1dfabd595091b66

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/416346/

Comments