guloader | 68570e404a256774e77174fefe7dbec3fe0d49f38bb912ab9263ee579d259082

General

Target

Dryppets.exe
Size

1.1MB
MD5

411efb6f23470867166f3990dbec6dad
SHA1

e9bb0868d4507c7b55dd048ee9662884cf7657b6
SHA256

68570e404a256774e77174fefe7dbec3fe0d49f38bb912ab9263ee579d259082
SHA512

7be032a3c1e0c85e57ae30d5ee856fb428dd6ed52f74ec21b1dc311068e09747ca8de02209f2393f1e73f4ec0bf700beb179f8424ec5b9853b9e37eab88f6fc3
SSDEEP

24576:iV8oSs6OQjptmgUy/QEw6wbfqiPACOedfHYNXNHA6w:iV8Nsm3XQEw3/ACOdHAj

Score

10^/10

guloader vipkeylogger collection discovery downloader keylogger spyware stealer

Malware Config

Extracted

Family

vipkeylogger

C2

https://api.telegram.org/bot8172976107:AAH5CXqEBGFF-CK18VpImdWAW7U_9296FqY/sendMessage?chat_id=6885960134

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
3188	Dryppets.exe
3188	Dryppets.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-1-5-21-2508704002-2325818048-3575902788-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Dryppets.exe
Key opened	\REGISTRY\USER\S-1-5-21-2508704002-2325818048-3575902788-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Dryppets.exe
Key opened	\REGISTRY\USER\S-1-5-21-2508704002-2325818048-3575902788-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Dryppets.exe

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

Web Service

T1102

flow	ioc
7	drive.google.com
8	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
20	checkip.dyndns.org
23	reallyfreegeoip.org
24	reallyfreegeoip.org

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
4952	Dryppets.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
3188	Dryppets.exe
4952	Dryppets.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Peppercorns241\septobasidium.ini	Dryppets.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	Dryppets.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Dryppets.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4952	Dryppets.exe
4952	Dryppets.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
3188	Dryppets.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4952	Dryppets.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3188 wrote to memory of 4952	3188	Dryppets.exe	88
PID 3188 wrote to memory of 4952	3188	Dryppets.exe	88
PID 3188 wrote to memory of 4952	3188	Dryppets.exe	88
PID 3188 wrote to memory of 4952	3188	Dryppets.exe	88

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2508704002-2325818048-3575902788-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Dryppets.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2508704002-2325818048-3575902788-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Dryppets.exe

C:\Users\Admin\AppData\Local\Temp\Dryppets.exe
"C:\Users\Admin\AppData\Local\Temp\Dryppets.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3188
- C:\Users\Admin\AppData\Local\Temp\Dryppets.exe
  "C:\Users\Admin\AppData\Local\Temp\Dryppets.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:4952

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\nsyE85D.tmp\System.dll

Filesize
11KB

MD5
34442e1e0c2870341df55e1b7b3cccdc

SHA1
99b2fa21aead4b6ccd8ff2f6d3d3453a51d9c70c

SHA256
269d232712c86983336badb40b9e55e80052d8389ed095ebf9214964d43b6bb1

SHA512
4a8c57fb12997438b488b862f3fc9dc0f236e07bb47b2bce6053dcb03ac7ad171842f02ac749f02dda4719c681d186330524cd2953d33cb50854844e74b33d51

Download Submit
memory/3188-20-0x0000000077541000-0x0000000077661000-memory.dmp

Filesize
1.1MB

Download
memory/3188-21-0x0000000077541000-0x0000000077661000-memory.dmp

Filesize
1.1MB

Download
memory/3188-22-0x0000000074334000-0x0000000074335000-memory.dmp

Filesize
4KB

Download
memory/4952-23-0x00000000016F0000-0x00000000071A9000-memory.dmp

Filesize
90.7MB

Download
memory/4952-24-0x00000000775C8000-0x00000000775C9000-memory.dmp

Filesize
4KB

Download
memory/4952-25-0x00000000775E5000-0x00000000775E6000-memory.dmp

Filesize
4KB

Download
memory/4952-35-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/4952-41-0x0000000077541000-0x0000000077661000-memory.dmp

Filesize
1.1MB

Download
memory/4952-39-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/4952-42-0x0000000071D4E000-0x0000000071D4F000-memory.dmp

Filesize
4KB

Download
memory/4952-43-0x0000000000490000-0x00000000004DA000-memory.dmp

Filesize
296KB

Download
memory/4952-44-0x000000003A000000-0x000000003A5A4000-memory.dmp

Filesize
5.6MB

Download
memory/4952-45-0x000000003A5B0000-0x000000003A64C000-memory.dmp

Filesize
624KB

Download
memory/4952-40-0x00000000016F0000-0x00000000071A9000-memory.dmp

Filesize
90.7MB

Download
memory/4952-46-0x0000000077541000-0x0000000077661000-memory.dmp

Filesize
1.1MB

Download
memory/4952-47-0x0000000071D40000-0x00000000724F0000-memory.dmp

Filesize
7.7MB

Download
memory/4952-49-0x0000000071D4E000-0x0000000071D4F000-memory.dmp

Filesize
4KB

Download
memory/4952-50-0x0000000071D40000-0x00000000724F0000-memory.dmp

Filesize
7.7MB

Download
memory/4952-52-0x000000003AB90000-0x000000003AD52000-memory.dmp

Filesize
1.8MB

Download
memory/4952-53-0x000000003A7D0000-0x000000003A820000-memory.dmp

Filesize
320KB

Download
memory/4952-54-0x000000003ADD0000-0x000000003B2FC000-memory.dmp

Filesize
5.2MB

Download
memory/4952-56-0x0000000037830000-0x00000000378C2000-memory.dmp

Filesize
584KB

Download
memory/4952-57-0x00000000378F0000-0x00000000378FA000-memory.dmp

Filesize
40KB

Download

Analysis

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