MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4590b8d9933fdb27ee938f2a74b173e7bb923398648d7adbd73991b84b8e69bf. 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 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4590b8d9933fdb27ee938f2a74b173e7bb923398648d7adbd73991b84b8e69bf
SHA3-384 hash: f56620f15a326a1420bbb3e5e73f8ad02b4dcaf2aed246a5432116acbf66dcd8c9307c45107d5ef86cc3604e6706dc73
SHA1 hash: aad8dcd4fc174b5d6d3f5332a28365eb8823b139
MD5 hash: de26cfa3b8284bcc180da445870afbb2
humanhash: two-michigan-skylark-steak
File name:Purchase Order -27 0652022 February 2023,pdf.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:506'360 bytes
First seen:2023-05-01 11:34:31 UTC
Last seen:2023-05-13 22:55:47 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 56a78d55f3f7af51443e58e0ce2fb5f6 (720 x GuLoader, 451 x Formbook, 295 x Loki)
ssdeep 12288:Nbbth9ePnK9DgJhi/Q650LrRDrrhCJgkcQ8KYMV:Nb5h9ePK9+cSrVygDM
Threatray 765 similar samples on MalwareBazaar
TLSH T101B42320EA20D936E767D17218361DAF4ECEB720A594274B03402F697D35792CE7732B
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 6c20ac23146b639c (4 x GuLoader)
Reporter Anonymous
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:
Issuer:
Algorithm:sha256WithRSAEncryption
Valid from:2022-12-03T02:28:11Z
Valid to:2025-12-02T02:28:11Z
Serial number: 79d222cc57a5d50f937c80c6cebf0b60d8396e4b
Thumbprint Algorithm:SHA256
Thumbprint: 7e02cf9e69a2e90ff1132aba2315ead0ed0f6e1c8e21ebda9812480a70a0fb21
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
2
# of downloads :
238
Origin country :
CH CH
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Purchase Order -27 0652022 February 2023,pdf.exe
Verdict:
Malicious activity
Analysis date:
2023-05-01 11:36:26 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/0d57c0af-efc2-42af-bfe0-548f3555ec40

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/385810/
Detection(s):
SecuriteInfo.com.Trojan.GenericKD.66681583.14376.19812.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a window
Creating a file
Creating a process from a recently created file
Sending a custom TCP request
Searching for the window
Launching a process
Result
Malware family:
n/a
Score:
  5/10
Tags:
n/a
Link:
https://dragonfly.certego.net/analysis/82093/overview
Behaviour
MalwareBazaar
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
guloader icedid overlay packed shell32.dll
Link:
https://www.filescan.io/uploads/644fa3e7edfde86c79815664/reports/7b0d437c-3616-40f7-b4eb-b9e886aa6666/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_90%
Link:
https://www.hybrid-analysis.com/sample/4590b8d9933fdb27ee938f2a74b173e7bb923398648d7adbd73991b84b8e69bf
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/92e92ac1-de1b-4b28-bb1c-dd1c260e7cd8
Result
Threat name:
GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1223980
Signature
Antivirus / Scanner detection for submitted sample
Initial sample is a PE file and has a suspicious name
Multi AV Scanner detection for submitted file
Snort IDS alert for network traffic
Tries to detect Any.run
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Very long command line found
Writes to foreign memory regions
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 856933 Sample: Purchase_Order_-27_0652022_... Startdate: 01/05/2023 Architecture: WINDOWS Score: 100 27 Snort IDS alert for network traffic 2->27 29 Antivirus / Scanner detection for submitted sample 2->29 31 Multi AV Scanner detection for submitted file 2->31 33 3 other signatures 2->33 8 Purchase_Order_-27_0652022_February_2023,pdf.exe 17 2->8         started        process3 file4 23 C:\Users\user\...\Signature Explorer.exe, PE32 8->23 dropped 11 powershell.exe 12 8->11         started        process5 signatures6 37 Very long command line found 11->37 14 powershell.exe 13 11->14         started        17 conhost.exe 11->17         started        process7 signatures8 39 Writes to foreign memory regions 14->39 41 Tries to detect Any.run 14->41 19 ieinstal.exe 12 14->19         started        process9 dnsIp10 25 185.254.37.66, 49835, 80 NETERRA-ASBG Germany 19->25 35 Tries to detect Any.run 19->35 signatures11
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4590b8d9933fdb27ee938f2a74b173e7bb923398648d7adbd73991b84b8e69bf/
Threat name:
Win32.Trojan.InjectorX
Create hunting rule
Status:
Malicious
First seen:
2023-04-27 01:05:22 UTC
File Type:
PE (Exe)
Extracted files:
43
AV detection:
14 of 37 (37.84%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=iwilrwmth7nsp3utr4vhjmlt465zem4ymsgxvw6xhgi3qs4ong7q._file
Verdict:
malicious
Similar samples:
07fa172e1404c76738226cefc6e5d45559430c9946e419ed089d9ae5690783f9
GuLoader
18b1abba90cf4a74b7216b91f02febb1c8694113f5ddc3507fd35b66253bcb83
GuLoader
3f6b1b62fd63112b0626567e8cd6a9179499109f1aee6fe0627d9b429add64d1
GuLoader
494d5735144af171cc15708b37b491b74be1522494958e605ac348dd4897dcf9
GuLoader
601068d38fe3988fac053f5be6fcd8f364ac199fcd278ebe10cd7ee74e9b2726
GuLoader
b534709b0de0c4392af03fea261580b08915ae1e5a55496f85dc21500c6a8338
GuLoader
d989ab685c59463a2ae115503881d520032409525de9846d458583e4ad75fc15
GuLoader
f13b318caba7938d24d18b32e16a1f111ec694b313590a4023f5e277d70ef7db
GuLoader
+ 755 additional samples on MalwareBazaar
Result
Malware family:
guloader
Create hunting rule
Score:
  10/10
Tags:
family:guloader downloader
Link:
https://tria.ge/reports/230501-npz15sfc98/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Checks QEMU agent file
Guloader,Cloudeye
Unpacked files
SH256 hash:
4590b8d9933fdb27ee938f2a74b173e7bb923398648d7adbd73991b84b8e69bf
MD5 hash:
de26cfa3b8284bcc180da445870afbb2
SHA1 hash:
aad8dcd4fc174b5d6d3f5332a28365eb8823b139
Link:
https://www.unpac.me/results/5aa28adc-ee4b-4605-8ce1-43a5c2df5bbc/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.59
Link:
https://yomi.yoroi.company/submissions/4590b8d9933fdb27ee938f2a74b173e7bb923398648d7adbd73991b84b8e69bf

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
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 4590b8d9933fdb27ee938f2a74b173e7bb923398648d7adbd73991b84b8e69bf

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/385810/

Comments