guloader | da762d136b75581e1502e9bea3406880c6a1cf138d3c09885cc8977aac96ade9

General

Target

Overmelts.exe
Size

990KB
MD5

4a1f527399836a20e0c648007bd75c4f
SHA1

2155f638fc81a0ff83da6dbd57375ff7bb22d09e
SHA256

151e5e6525dafef00671528a54c639918f7598b0d0b36fa2de0bc92db585e7b1
SHA512

73170e38024e8658cf20a99106eef0bf2052d27c97fa871dfdac744e51f24f06cf9d2ad1cfe3ef7888128be552b72e429ab77b766109fe9c855856f830a7f39e
SSDEEP

24576:pG9BmJnN9a01Y2EiqFjIVkUINdOko/vrP:mBmJN9a0y3iqFEVHIN3oHrP

Score

10^/10

guloader vipkeylogger discovery downloader keylogger stealer

Malware Config

Extracted

Family

vipkeylogger

C2

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
804	Overmelts.exe
804	Overmelts.exe

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

Web Service

T1102

flow	ioc
5	drive.google.com
4	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
14	checkip.dyndns.org
16	reallyfreegeoip.org
17	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
2452	Overmelts.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
804	Overmelts.exe
2452	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

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 1 IoCs

pid	Process
2452	Overmelts.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
804	Overmelts.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2452	Overmelts.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 804 wrote to memory of 2452	804	Overmelts.exe	31
PID 804 wrote to memory of 2452	804	Overmelts.exe	31
PID 804 wrote to memory of 2452	804	Overmelts.exe	31
PID 804 wrote to memory of 2452	804	Overmelts.exe	31
PID 804 wrote to memory of 2452	804	Overmelts.exe	31

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:804
- C:\Users\Admin\AppData\Local\Temp\Overmelts.exe
  "C:\Users\Admin\AppData\Local\Temp\Overmelts.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2452

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
1KB

MD5
d14da59217c7aefb1b6271a6d654a18b

SHA1
7bf474c0b2f273b282dbf7878395dd700fcfacf4

SHA256
7125524ef588c3716af1f3a3a5c000d79a03b5dae7fc3ca5cc83e89b971e4f04

SHA512
72842dbcc3ac804fbb8c1ff3f2c6ed3d9db7759a13ebb452e8c775daaea412b44b85a4d6de4036f9d9790f4a210c141642527281388b2696eb911c409f9b3053

Download Submit
\Users\Admin\AppData\Local\Temp\nstE3EB.tmp\System.dll

Filesize
11KB

MD5
b853d5d2361ade731e33e882707efc34

SHA1
c58b1aeabdf1cbb8334ef8797e7aceaa7a1cb6be

SHA256
f0cd96e0b6e40f92ad1aa0efacde833bae807b92fca19bf062c1cf8acf29484b

SHA512
8ea31d82ffa6f58dab5632fe72690d3a6db0be65aec85fc8a1f71626773c0974dcebefae17bcf67c4c56ef442545e985eea0b348ff6e4fc36740640092b08d69

Download Submit
memory/804-312-0x0000000077271000-0x0000000077372000-memory.dmp

Filesize
1.0MB

Download
memory/804-313-0x0000000077270000-0x0000000077419000-memory.dmp

Filesize
1.7MB

Download
memory/2452-314-0x00000000014F0000-0x00000000052B5000-memory.dmp

Filesize
61.8MB

Download
memory/2452-315-0x0000000077270000-0x0000000077419000-memory.dmp

Filesize
1.7MB

Download
memory/2452-336-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/2452-338-0x0000000000480000-0x00000000004CA000-memory.dmp

Filesize
296KB

Download
memory/2452-337-0x00000000014F0000-0x00000000052B5000-memory.dmp

Filesize
61.8MB

Download

Analysis

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