guloader | fc46d2f1ee0c658db2aa99663d211fbd04bfd5bffae328243065b42bbb1f2629

General

Target

Bronchoscopes.exe
Size

993KB
MD5

e8f5efe2bd32d94f83c8201f0e75de1f
SHA1

fef6badc7eb0acacbce22768468b6aea1cd59ca0
SHA256

1ef06d43a4c7f3a59f0829b20d820e0eae0da9bfd55eaa4269022d0228735d31
SHA512

1b28b718c995383420e67fde4a7aafdbfcc1f10a0614bf3b6ca4648617cbbc28a97598be478923cdb664084f725a711ba4160d3b4d322b13584f197e0d6e4d99
SSDEEP

24576:BGHfInLKDkeGPzR3MUzzUqi9Z7cuzNLrCP:4faLKEPN3MUXUqiT7Lk

Score

10^/10

guloader vipkeylogger discovery downloader keylogger 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
296	Bronchoscopes.exe
296	Bronchoscopes.exe

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

Web Service

T1102

flow	ioc
3	drive.google.com
5	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	Bronchoscopes.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2376	Bronchoscopes.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
296	Bronchoscopes.exe
2376	Bronchoscopes.exe

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\delarbejderne.nar	Bronchoscopes.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\fremmder\ifaldne.lev	Bronchoscopes.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	Bronchoscopes.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Bronchoscopes.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2376	Bronchoscopes.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
296	Bronchoscopes.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2376	Bronchoscopes.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 296 wrote to memory of 2376	296	Bronchoscopes.exe	30
PID 296 wrote to memory of 2376	296	Bronchoscopes.exe	30
PID 296 wrote to memory of 2376	296	Bronchoscopes.exe	30
PID 296 wrote to memory of 2376	296	Bronchoscopes.exe	30
PID 296 wrote to memory of 2376	296	Bronchoscopes.exe	30

C:\Users\Admin\AppData\Local\Temp\Bronchoscopes.exe
"C:\Users\Admin\AppData\Local\Temp\Bronchoscopes.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:296
- C:\Users\Admin\AppData\Local\Temp\Bronchoscopes.exe
  "C:\Users\Admin\AppData\Local\Temp\Bronchoscopes.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2376

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
edc7ad0cd42a967fb5a9745c20ad277c

SHA1
9e6fc41f2042b1797da059704fa6855d54e40959

SHA256
efdd13b9a1180da1d297916588b246881d9e9c4c1e8768db75f272c5a987435a

SHA512
d5bcaff714e2441f21e5dbb3253cf8250a039a528fdc435ad8adace7ec06261aee8e1fd2910d15959b0356f0053f69b2bf1bca4b647ea8ab954c8542bf47d77e

Download Submit
\Users\Admin\AppData\Local\Temp\nso206E.tmp\System.dll

Filesize
11KB

MD5
b853d5d2361ade731e33e882707efc34

SHA1
c58b1aeabdf1cbb8334ef8797e7aceaa7a1cb6be

SHA256
f0cd96e0b6e40f92ad1aa0efacde833bae807b92fca19bf062c1cf8acf29484b

SHA512
8ea31d82ffa6f58dab5632fe72690d3a6db0be65aec85fc8a1f71626773c0974dcebefae17bcf67c4c56ef442545e985eea0b348ff6e4fc36740640092b08d69

Download Submit
memory/296-312-0x0000000003690000-0x0000000004B02000-memory.dmp

Filesize
20.4MB

Download
memory/296-313-0x0000000076F41000-0x0000000077042000-memory.dmp

Filesize
1.0MB

Download
memory/296-314-0x0000000076F40000-0x00000000770E9000-memory.dmp

Filesize
1.7MB

Download
memory/296-316-0x0000000003690000-0x0000000004B02000-memory.dmp

Filesize
20.4MB

Download
memory/2376-315-0x00000000014F0000-0x0000000002962000-memory.dmp

Filesize
20.4MB

Download
memory/2376-317-0x0000000076F40000-0x00000000770E9000-memory.dmp

Filesize
1.7MB

Download
memory/2376-336-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/2376-340-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/2376-341-0x00000000014F0000-0x0000000002962000-memory.dmp

Filesize
20.4MB

Download
memory/2376-342-0x0000000000480000-0x00000000004CA000-memory.dmp

Filesize
296KB

Download

Analysis

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