guloader | 262d6420018c8000d4f95686b9b6862737b7bd46ca94916c0c23d4ae603a8e5f

Analysis

max time kernel
143s
max time network
145s
platform
windows10-2004_x64
resource
win10v2004-20250217-en
resource tags

arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system
submitted
19/02/2025, 19:10

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General

Target

Skery.exe
Size

673KB
MD5

23c5b9f638e095f67c6e0c038431f24b
SHA1

6b3366c3ff8aa8576c520adb20f6fdea2393ed7f
SHA256

380487150b51a339c3d8c34526c0109d9b5a904aee3e41abc62c04a63ec18dfb
SHA512

0dea689116a01ac15e11420cdbfc01bf70b010fc175f726e873f2f32356d2521dbaf9369b193ca8439a98f29950e5a51e98598e03af5a8995a561b3523b74d15
SSDEEP

12288:Xa/AcZ6qJ2s1+pBOijz3U1PbGf+883INo89u/r2XdgjPEmADNA0EpphZNG2q:X4Z6SQB5/3U5SWN3INFu/9jsmY0q

Score

10^/10

guloader vipkeylogger collection discovery downloader keylogger spyware stealer

Malware Config

Extracted

Family

vipkeylogger

https://api.telegram.org/bot7888169387:AAFhsoUaeWK9XqbrEJl452LFnH_AAaGbsWI/sendMessage?chat_id=6838630391

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
2992	Skery.exe
2992	Skery.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-1-5-21-1170604239-850860757-3112005715-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Skery.exe
Key opened	\REGISTRY\USER\S-1-5-21-1170604239-850860757-3112005715-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Skery.exe
Key opened	\REGISTRY\USER\S-1-5-21-1170604239-850860757-3112005715-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Skery.exe

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

Web Service

T1102

flow	ioc
24	drive.google.com
25	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
43	checkip.dyndns.org
50	reallyfreegeoip.org
51	reallyfreegeoip.org

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
4324	Skery.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2992	Skery.exe
4324	Skery.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	Skery.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Skery.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4324	Skery.exe
4324	Skery.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2992	Skery.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4324	Skery.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2992 wrote to memory of 4324	2992	Skery.exe	87
PID 2992 wrote to memory of 4324	2992	Skery.exe	87
PID 2992 wrote to memory of 4324	2992	Skery.exe	87
PID 2992 wrote to memory of 4324	2992	Skery.exe	87

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1170604239-850860757-3112005715-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Skery.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1170604239-850860757-3112005715-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Skery.exe

C:\Users\Admin\AppData\Local\Temp\Skery.exe
"C:\Users\Admin\AppData\Local\Temp\Skery.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2992
- C:\Users\Admin\AppData\Local\Temp\Skery.exe
  "C:\Users\Admin\AppData\Local\Temp\Skery.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:4324

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:\Users\Admin\AppData\Local\Temp\nsw8A7.tmp\System.dll

Filesize
12KB

MD5
0d7ad4f45dc6f5aa87f606d0331c6901

SHA1
48df0911f0484cbe2a8cdd5362140b63c41ee457

SHA256
3eb38ae99653a7dbc724132ee240f6e5c4af4bfe7c01d31d23faf373f9f2eaca

SHA512
c07de7308cb54205e8bd703001a7fe4fd7796c9ac1b4bb330c77c872bf712b093645f40b80ce7127531fe6746a5b66e18ea073ab6a644934abed9bb64126fea9

Download Submit
C:\Users\Admin\Music\timelanges.lnk

Filesize
860B

MD5
ef597fcc608ced0ecf4083b7d9587da1

SHA1
c9052b2fe35e85d1173e6a09d35016e7c79c2a64

SHA256
acdaa3db55b4f32391dde5567ac43635712f2f2e0aaa62f6ba66f54131e9e357

SHA512
ff2f00eb2bfb0bd1527d12584fc3397484f8d9439dac3ad480416ff8b749c800c2fc2846282e83f7c9895af706bd09a11c36a864449dba2785daf443c91ab145

Download Submit
memory/2992-307-0x0000000077281000-0x00000000773A1000-memory.dmp

Filesize
1.1MB

Download
memory/2992-308-0x0000000077281000-0x00000000773A1000-memory.dmp

Filesize
1.1MB

Download
memory/2992-309-0x0000000074725000-0x0000000074726000-memory.dmp

Filesize
4KB

Download
memory/4324-328-0x00000000016F0000-0x000000000554F000-memory.dmp

Filesize
62.4MB

Download
memory/4324-331-0x00000000383A0000-0x0000000038944000-memory.dmp

Filesize
5.6MB

Download
memory/4324-312-0x0000000077325000-0x0000000077326000-memory.dmp

Filesize
4KB

Download
memory/4324-316-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/4324-317-0x0000000077281000-0x00000000773A1000-memory.dmp

Filesize
1.1MB

Download
memory/4324-327-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/4324-329-0x000000007217E000-0x000000007217F000-memory.dmp

Filesize
4KB

Download
memory/4324-310-0x00000000016F0000-0x000000000554F000-memory.dmp

Filesize
62.4MB

Download
memory/4324-330-0x0000000000490000-0x00000000004DA000-memory.dmp

Filesize
296KB

Download
memory/4324-311-0x0000000077308000-0x0000000077309000-memory.dmp

Filesize
4KB

Download
memory/4324-332-0x0000000038950000-0x00000000389EC000-memory.dmp

Filesize
624KB

Download
memory/4324-333-0x0000000072170000-0x0000000072920000-memory.dmp

Filesize
7.7MB

Download
memory/4324-335-0x000000007217E000-0x000000007217F000-memory.dmp

Filesize
4KB

Download
memory/4324-336-0x0000000072170000-0x0000000072920000-memory.dmp

Filesize
7.7MB

Download
memory/4324-339-0x0000000038F00000-0x00000000390C2000-memory.dmp

Filesize
1.8MB

Download
memory/4324-340-0x0000000035BE0000-0x0000000035C30000-memory.dmp

Filesize
320KB

Download
memory/4324-341-0x00000000390D0000-0x00000000395FC000-memory.dmp

Filesize
5.2MB

Download
memory/4324-343-0x0000000039600000-0x0000000039692000-memory.dmp

Filesize
584KB

Download
memory/4324-344-0x00000000396A0000-0x00000000396AA000-memory.dmp

Filesize
40KB

Download