guloader | b9420f4408d03c46b98a379a226ae92367d7af7053309821097d9988742defe3

General

Target

Minty.exe
Size

1.1MB
MD5

0655e0d2ba0e2e1c6dff3fc641df6e51
SHA1

a59607c3c85aefe38a9b1120f62cd9068eb40a57
SHA256

86f314ed376d8d0f2b6d6a99cbd54a05d536d13fb76d163243198253b12e5f54
SHA512

b9e9a1d2db29b756d0fa85b01e4af65c53069715ee45d4f83b29f85c06deb946dd00020591d370ac6d6689f6f1f1d5fcb5b524f59f9ef6ad9f4d5a3da85ea7b9
SSDEEP

24576:yjl8n94KG/k6Jw4odKq3ry+HNU7OIdzkLa:mKnex/kIteKgHNUlV8a

Score

10^/10

guloader vipkeylogger collection discovery downloader keylogger spyware stealer

Malware Config

Extracted

Family

vipkeylogger

C2

https://api.telegram.org/bot7745751910:AAGY46QDCTWO_Pw9iDqZhkNij-i4uwbMgzE/sendMessage?chat_id=7695061973

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
4068	Minty.exe
4068	Minty.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-1-5-21-2278412438-3475196406-3686434223-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Minty.exe
Key opened	\REGISTRY\USER\S-1-5-21-2278412438-3475196406-3686434223-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Minty.exe
Key opened	\REGISTRY\USER\S-1-5-21-2278412438-3475196406-3686434223-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Minty.exe

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

Web Service

T1102

flow	ioc
37	drive.google.com
38	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
62	checkip.dyndns.org
65	reallyfreegeoip.org
66	reallyfreegeoip.org

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
4984	Minty.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4068	Minty.exe
4984	Minty.exe

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\styrbordets.Vet	Minty.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	Minty.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Minty.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4984	Minty.exe
4984	Minty.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
4068	Minty.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4984	Minty.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4068 wrote to memory of 4984	4068	Minty.exe	94
PID 4068 wrote to memory of 4984	4068	Minty.exe	94
PID 4068 wrote to memory of 4984	4068	Minty.exe	94
PID 4068 wrote to memory of 4984	4068	Minty.exe	94

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2278412438-3475196406-3686434223-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Minty.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2278412438-3475196406-3686434223-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Minty.exe

C:\Users\Admin\AppData\Local\Temp\Minty.exe
"C:\Users\Admin\AppData\Local\Temp\Minty.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4068
- C:\Users\Admin\AppData\Local\Temp\Minty.exe
  "C:\Users\Admin\AppData\Local\Temp\Minty.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:4984

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

2

T1552

Credentials In Files

2

T1552.001

Discovery

Browser Information Discovery

1

T1217

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsqB9EB.tmp\System.dll

Filesize
11KB

MD5
c61501f07cf09bcfcdfe4cc8a1ebbbe3

SHA1
e8581b4359651b857646ae727efaaef372daa0fc

SHA256
7e75f148920db6300dad5a1c12fd5d6eecc95698a310a01311181bc98a704d55

SHA512
9837abe7ec3fa0f1f5193968d12b7ca1893e34eddf628db1f7ab6715b4de339231f0ec1b5f0f86c767f5a30c40da5c4a95e99deedd22eece93cb0d00539aad24

Download Submit
memory/4068-14-0x00000000772B1000-0x00000000773D1000-memory.dmp

Filesize
1.1MB

Download
memory/4068-15-0x00000000772B1000-0x00000000773D1000-memory.dmp

Filesize
1.1MB

Download
memory/4068-16-0x0000000074755000-0x0000000074756000-memory.dmp

Filesize
4KB

Download
memory/4984-17-0x0000000001700000-0x0000000006FDE000-memory.dmp

Filesize
88.9MB

Download
memory/4984-18-0x0000000077338000-0x0000000077339000-memory.dmp

Filesize
4KB

Download
memory/4984-19-0x0000000077355000-0x0000000077356000-memory.dmp

Filesize
4KB

Download
memory/4984-32-0x00000000004A0000-0x00000000016F4000-memory.dmp

Filesize
18.3MB

Download
memory/4984-34-0x00000000772B1000-0x00000000773D1000-memory.dmp

Filesize
1.1MB

Download
memory/4984-33-0x00000000004A0000-0x00000000016F4000-memory.dmp

Filesize
18.3MB

Download
memory/4984-36-0x00000000721AE000-0x00000000721AF000-memory.dmp

Filesize
4KB

Download
memory/4984-37-0x00000000004A0000-0x00000000004EA000-memory.dmp

Filesize
296KB

Download
memory/4984-38-0x0000000039D80000-0x000000003A324000-memory.dmp

Filesize
5.6MB

Download
memory/4984-39-0x0000000039CB0000-0x0000000039D4C000-memory.dmp

Filesize
624KB

Download
memory/4984-35-0x0000000001700000-0x0000000006FDE000-memory.dmp

Filesize
88.9MB

Download
memory/4984-40-0x00000000721A0000-0x0000000072950000-memory.dmp

Filesize
7.7MB

Download
memory/4984-42-0x00000000721AE000-0x00000000721AF000-memory.dmp

Filesize
4KB

Download
memory/4984-43-0x00000000721A0000-0x0000000072950000-memory.dmp

Filesize
7.7MB

Download
memory/4984-44-0x000000003A830000-0x000000003A9F2000-memory.dmp

Filesize
1.8MB

Download
memory/4984-45-0x000000003AA00000-0x000000003AA50000-memory.dmp

Filesize
320KB

Download
memory/4984-46-0x000000003AAC0000-0x000000003AFEC000-memory.dmp

Filesize
5.2MB

Download
memory/4984-48-0x000000003B040000-0x000000003B0D2000-memory.dmp

Filesize
584KB

Download
memory/4984-49-0x000000003B130000-0x000000003B13A000-memory.dmp

Filesize
40KB

Download

Analysis

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