guloader | da762d136b75581e1502e9bea3406880c6a1cf138d3c09885cc8977aac96ade9

Analysis

max time kernel
146s
max time network
136s
platform
windows10-2004_x64
resource
win10v2004-20250217-en
resource tags

arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system
submitted
21-02-2025 07:27

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General

Target

Overmelts.exe
Size

990KB
MD5

4a1f527399836a20e0c648007bd75c4f
SHA1

2155f638fc81a0ff83da6dbd57375ff7bb22d09e
SHA256

151e5e6525dafef00671528a54c639918f7598b0d0b36fa2de0bc92db585e7b1
SHA512

73170e38024e8658cf20a99106eef0bf2052d27c97fa871dfdac744e51f24f06cf9d2ad1cfe3ef7888128be552b72e429ab77b766109fe9c855856f830a7f39e
SSDEEP

24576:pG9BmJnN9a01Y2EiqFjIVkUINdOko/vrP:mBmJN9a0y3iqFEVHIN3oHrP

Score

10^/10

guloader vipkeylogger collection discovery downloader keylogger spyware stealer

Malware Config

Extracted

Family

vipkeylogger

https://api.telegram.org/bot7868872251:AAGgFQ9Bkl4sqj91n2vPKSuoyNLVzJTqODY/sendMessage?chat_id=8173633564

Signatures

Guloader family
guloader
Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader
VIPKeylogger
VIPKeylogger is a keylogger and infostealer written in C# and it resembles SnakeKeylogger that was found in 2020.
stealer keylogger vipkeylogger
Vipkeylogger family
vipkeylogger

Loads dropped DLL 2 IoCs

pid	Process
1880	Overmelts.exe
1880	Overmelts.exe

Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-100612193-3312047696-905266872-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Overmelts.exe
Key opened	\REGISTRY\USER\S-1-5-21-100612193-3312047696-905266872-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Overmelts.exe
Key opened	\REGISTRY\USER\S-1-5-21-100612193-3312047696-905266872-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Overmelts.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
9	drive.google.com
10	drive.google.com

Looks up external IP address via web service 3 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
22	checkip.dyndns.org
24	reallyfreegeoip.org
25	reallyfreegeoip.org

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\revyviserne\Tilbed.ini	Overmelts.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
4260	Overmelts.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1880	Overmelts.exe
4260	Overmelts.exe

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\delarbejderne.nar	Overmelts.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\fremmder\ifaldne.lev	Overmelts.exe

Browser Information Discovery 1 TTPs
Enumerate browser information.
discovery

Browser Information Discovery
T1217
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Overmelts.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Overmelts.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4260	Overmelts.exe
4260	Overmelts.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1880	Overmelts.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4260	Overmelts.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1880 wrote to memory of 4260	1880	Overmelts.exe	89
PID 1880 wrote to memory of 4260	1880	Overmelts.exe	89
PID 1880 wrote to memory of 4260	1880	Overmelts.exe	89
PID 1880 wrote to memory of 4260	1880	Overmelts.exe	89

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-100612193-3312047696-905266872-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Overmelts.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-100612193-3312047696-905266872-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Overmelts.exe

C:\Users\Admin\AppData\Local\Temp\Overmelts.exe
"C:\Users\Admin\AppData\Local\Temp\Overmelts.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Program Files directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1880
- C:\Users\Admin\AppData\Local\Temp\Overmelts.exe
  "C:\Users\Admin\AppData\Local\Temp\Overmelts.exe"
  2⤵
  - Accesses Microsoft Outlook profiles
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:4260

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Browser Information Discovery

T1217

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

C:\ProgramData\Microsoft\Windows\Templates\dinosaurusserne.lnk

Filesize
1KB

MD5
bd93bb2a921ea4d1d7a8d42b93ce6b99

SHA1
9f0a7baf50125227e6a2d24957f31dc08c126048

SHA256
93ecef790590d837ab52ea89755bc9a7e2d5417ae17360f4f2e7f73ef29c9544

SHA512
609dda714cc10c35a0f794416c2d4262d03574c44c96c18fc10c0fae98e1bbed4bd14811ab3765fa58f6991933c2a5c03311709dada513ca6a670877c68a4324

Download Submit
C:\Users\Admin\AppData\Local\Temp\nslD469.tmp\System.dll

Filesize
11KB

MD5
b853d5d2361ade731e33e882707efc34

SHA1
c58b1aeabdf1cbb8334ef8797e7aceaa7a1cb6be

SHA256
f0cd96e0b6e40f92ad1aa0efacde833bae807b92fca19bf062c1cf8acf29484b

SHA512
8ea31d82ffa6f58dab5632fe72690d3a6db0be65aec85fc8a1f71626773c0974dcebefae17bcf67c4c56ef442545e985eea0b348ff6e4fc36740640092b08d69

Download Submit
memory/1880-312-0x00007FFFF5B90000-0x00007FFFF5D85000-memory.dmp

Filesize
2.0MB

Download
memory/4260-313-0x00000000016E0000-0x00000000054A5000-memory.dmp

Filesize
61.8MB

Download
memory/4260-314-0x00007FFFF5B90000-0x00007FFFF5D85000-memory.dmp

Filesize
2.0MB

Download
memory/4260-315-0x00007FFFF5B90000-0x00007FFFF5D85000-memory.dmp

Filesize
2.0MB

Download
memory/4260-330-0x00007FFFF5B90000-0x00007FFFF5D85000-memory.dmp

Filesize
2.0MB

Download
memory/4260-328-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/4260-329-0x00000000016E0000-0x00000000054A5000-memory.dmp

Filesize
61.8MB

Download
memory/4260-332-0x00007FFFF5B90000-0x00007FFFF5D85000-memory.dmp

Filesize
2.0MB

Download
memory/4260-333-0x0000000000480000-0x00000000004CA000-memory.dmp

Filesize
296KB

Download
memory/4260-334-0x0000000038360000-0x0000000038904000-memory.dmp

Filesize
5.6MB

Download
memory/4260-335-0x00000000381B0000-0x000000003824C000-memory.dmp

Filesize
624KB

Download
memory/4260-336-0x00007FFFF5B90000-0x00007FFFF5D85000-memory.dmp

Filesize
2.0MB

Download
memory/4260-337-0x0000000038E30000-0x0000000038FF2000-memory.dmp

Filesize
1.8MB

Download
memory/4260-338-0x0000000039000000-0x0000000039050000-memory.dmp

Filesize
320KB

Download
memory/4260-339-0x00000000390D0000-0x00000000395FC000-memory.dmp

Filesize
5.2MB

Download
memory/4260-341-0x0000000039650000-0x00000000396E2000-memory.dmp

Filesize
584KB

Download
memory/4260-342-0x0000000039740000-0x000000003974A000-memory.dmp

Filesize
40KB

Download