guloader | 94b9481e10fa8c73e2d9210307b9fc801789c90e7d019b52aa350fb2874211d5

General

Target

diploidic.exe
Size

965KB
MD5

719dbfa5b2d54de14124bee416c8ced5
SHA1

6d7cf9b197b48385746515c41aaa5f6763ab058c
SHA256

3321c56f762ab7b56b78cdc7c4a0f1675f5b72b85f9328a62ab00169c44ce816
SHA512

a92387e5f6852818a0bedaa1c1970ba92016cb373937ce95ee94ecc2fa1bb17cbc8379c466d66346088a4f0eac39097c398a8aa93ce7db06cbc7298144ac32c5
SSDEEP

24576:DfYzitFHRyl1Ts+SRAZimn34BNIEOlyGmsYu8g7++072+W7g:rYywuAQO4BNIEpG8u8gswg

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
2724	diploidic.exe
2724	diploidic.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-1-5-21-925314154-1797147466-1467878628-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	diploidic.exe
Key opened	\REGISTRY\USER\S-1-5-21-925314154-1797147466-1467878628-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	diploidic.exe
Key opened	\REGISTRY\USER\S-1-5-21-925314154-1797147466-1467878628-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	diploidic.exe

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

Web Service

T1102

flow	ioc
30	drive.google.com
31	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
45	reallyfreegeoip.org
46	reallyfreegeoip.org

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
3604	diploidic.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2724	diploidic.exe
3604	diploidic.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\0409\Concubitus.ini	diploidic.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	diploidic.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	diploidic.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3604	diploidic.exe
3604	diploidic.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2724	diploidic.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3604	diploidic.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2724 wrote to memory of 3604	2724	diploidic.exe	93
PID 2724 wrote to memory of 3604	2724	diploidic.exe	93
PID 2724 wrote to memory of 3604	2724	diploidic.exe	93
PID 2724 wrote to memory of 3604	2724	diploidic.exe	93

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-925314154-1797147466-1467878628-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	diploidic.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-925314154-1797147466-1467878628-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	diploidic.exe

C:\Users\Admin\AppData\Local\Temp\diploidic.exe
"C:\Users\Admin\AppData\Local\Temp\diploidic.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:2724
- C:\Users\Admin\AppData\Local\Temp\diploidic.exe
  "C:\Users\Admin\AppData\Local\Temp\diploidic.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:3604

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\nseC351.tmp\System.dll

Filesize
12KB

MD5
192639861e3dc2dc5c08bb8f8c7260d5

SHA1
58d30e460609e22fa0098bc27d928b689ef9af78

SHA256
23d618a0293c78ce00f7c6e6dd8b8923621da7dd1f63a070163ef4c0ec3033d6

SHA512
6e573d8b2ef6ed719e271fd0b2fd9cd451f61fc9a9459330108d6d7a65a0f64016303318cad787aa1d5334ba670d8f1c7c13074e1be550b4a316963ecc465cdc

Download Submit
memory/2724-27-0x00000000028A0000-0x0000000005336000-memory.dmp

Filesize
42.6MB

Download
memory/2724-28-0x00000000028A0000-0x0000000005336000-memory.dmp

Filesize
42.6MB

Download
memory/2724-31-0x0000000074C20000-0x0000000074C27000-memory.dmp

Filesize
28KB

Download
memory/2724-30-0x0000000074C25000-0x0000000074C26000-memory.dmp

Filesize
4KB

Download
memory/2724-29-0x0000000077901000-0x0000000077A21000-memory.dmp

Filesize
1.1MB

Download
memory/3604-32-0x0000000001700000-0x0000000004196000-memory.dmp

Filesize
42.6MB

Download
memory/3604-33-0x0000000001700000-0x0000000004196000-memory.dmp

Filesize
42.6MB

Download
memory/3604-46-0x00000000004A0000-0x00000000016F4000-memory.dmp

Filesize
18.3MB

Download
memory/3604-48-0x0000000001700000-0x0000000004196000-memory.dmp

Filesize
42.6MB

Download
memory/3604-47-0x00000000004A0000-0x00000000016F4000-memory.dmp

Filesize
18.3MB

Download
memory/3604-49-0x0000000001700000-0x0000000004196000-memory.dmp

Filesize
42.6MB

Download
memory/3604-50-0x00000000004A0000-0x00000000004EA000-memory.dmp

Filesize
296KB

Download
memory/3604-51-0x0000000036E60000-0x0000000037404000-memory.dmp

Filesize
5.6MB

Download
memory/3604-52-0x0000000037410000-0x00000000374AC000-memory.dmp

Filesize
624KB

Download
memory/3604-54-0x00000000379B0000-0x0000000037B72000-memory.dmp

Filesize
1.8MB

Download
memory/3604-55-0x0000000037BA0000-0x0000000037BF0000-memory.dmp

Filesize
320KB

Download
memory/3604-56-0x0000000037C80000-0x00000000381AC000-memory.dmp

Filesize
5.2MB

Download
memory/3604-58-0x0000000038200000-0x0000000038292000-memory.dmp

Filesize
584KB

Download
memory/3604-59-0x00000000382F0000-0x00000000382FA000-memory.dmp

Filesize
40KB

Download

Analysis

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