guloader | 034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a

General

Target

Belialist.exe
Size

511KB
MD5

24d65daddfed0602d8c90b5dfa47b7bb
SHA1

c46f000d10a66687cefd4a8fee1c8b3e84afd4b9
SHA256

034d0ad83a1a41c3fb2be5110d68a545b2426a337006a7f34a2050a0c7a18b9a
SHA512

09e16a15e18eb08f45f964fa271365e688507d561fc8567ce9417a54283dfb0785ef5a379456bb44cea187d7a5951521347a3e6f139560327460dfd449a6fe33
SSDEEP

12288:OjkqENMhypm0dvksi4P60gnkwNpRp9gS1S:yEmh8rRkvc61k4s

Score

10^/10

guloader remcos remotehost discovery downloader rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

212.162.149.195:2404

Attributes

audio_folder
MicRecords
audio_path
ApplicationPath
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
Remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-9EP276
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
false
take_screenshot_time
5

Signatures

Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader
Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

Loads dropped DLL 2 IoCs

pid	Process
2280	Belialist.exe
2280	Belialist.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2780	Belialist.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2280	Belialist.exe
2780	Belialist.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2280 set thread context of 2780	2280	Belialist.exe	31

Drops file in Windows directory 1 IoCs

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

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2280	Belialist.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2780	Belialist.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2280 wrote to memory of 2780	2280	Belialist.exe	31
PID 2280 wrote to memory of 2780	2280	Belialist.exe	31
PID 2280 wrote to memory of 2780	2280	Belialist.exe	31
PID 2280 wrote to memory of 2780	2280	Belialist.exe	31
PID 2280 wrote to memory of 2780	2280	Belialist.exe	31
PID 2280 wrote to memory of 2780	2280	Belialist.exe	31

C:\Users\Admin\AppData\Local\Temp\Belialist.exe
"C:\Users\Admin\AppData\Local\Temp\Belialist.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2280
- C:\Users\Admin\AppData\Local\Temp\Belialist.exe
  "C:\Users\Admin\AppData\Local\Temp\Belialist.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:2780

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

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
0c6b44fad7d223e1283cca0abcec808f

SHA1
d3514863a419153da4b21382f2b1f32bca397c33

SHA256
2a3f16fb6380b7adef88bb4acf9baf43d27b9e81326d49a72deadf0144caff3d

SHA512
7a726d4ca84bce1704f5578b5e04e4d4555b6f08d2fedf9707ea1b17572e05d4f491d62b70b4cc6eb0811292afa6a73cfb1b453e929f8c5cd6f0b4fee28a6ded

Download Submit
\Users\Admin\AppData\Local\Temp\nseFA67.tmp\System.dll

Filesize
11KB

MD5
960a5c48e25cf2bca332e74e11d825c9

SHA1
da35c6816ace5daf4c6c1d57b93b09a82ecdc876

SHA256
484f8e9f194ed9016274ef3672b2c52ed5f574fb71d3884edf3c222b758a75a2

SHA512
cc450179e2d0d56aee2ccf8163d3882978c4e9c1aa3d3a95875fe9ba9831e07ddfd377111dc67f801fa53b6f468a418f086f1de7c71e0a5b634e1ae2a67cd3da

Download Submit
memory/2280-25-0x0000000003250000-0x0000000005AAE000-memory.dmp

Filesize
40.4MB

Download
memory/2280-22-0x0000000077271000-0x0000000077372000-memory.dmp

Filesize
1.0MB

Download
memory/2280-23-0x0000000077270000-0x0000000077419000-memory.dmp

Filesize
1.7MB

Download
memory/2280-21-0x0000000003250000-0x0000000005AAE000-memory.dmp

Filesize
40.4MB

Download
memory/2280-20-0x0000000003250000-0x0000000005AAE000-memory.dmp

Filesize
40.4MB

Download
memory/2780-24-0x0000000077270000-0x0000000077419000-memory.dmp

Filesize
1.7MB

Download
memory/2780-26-0x0000000000470000-0x00000000014D2000-memory.dmp

Filesize
16.4MB

Download
memory/2780-32-0x0000000000470000-0x00000000014D2000-memory.dmp

Filesize
16.4MB

Download
memory/2780-36-0x0000000000470000-0x00000000014D2000-memory.dmp

Filesize
16.4MB

Download
memory/2780-37-0x0000000000470000-0x00000000014D2000-memory.dmp

Filesize
16.4MB

Download
memory/2780-41-0x0000000000470000-0x00000000014D2000-memory.dmp

Filesize
16.4MB

Download
memory/2780-44-0x0000000000470000-0x00000000014D2000-memory.dmp

Filesize
16.4MB

Download
memory/2780-47-0x0000000000470000-0x00000000014D2000-memory.dmp

Filesize
16.4MB

Download

Analysis

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