guloader | 7e485dc6c635c50959ccc4b529a1e8b039eca2c9b1a505c782430c48e9ad16c4

General

Target

DHL AWB and INV.scr.exe
Size

712KB
MD5

e3e28e486e93c0b27fe0453b9e038cb9
SHA1

08335cf5d72c462460627f02dc20773605d09e54
SHA256

7e485dc6c635c50959ccc4b529a1e8b039eca2c9b1a505c782430c48e9ad16c4
SHA512

eb9bf2827836a97b7cd439e9ec834e7a53e56655027b94ebaa4e8ad4de639871e65061f01f9626df3cb936f80be2cd1b316706a1aa2b2625ead6c74036efd147
SSDEEP

12288:LR3BUI4nAZlVqi3Zd9WAp7LE5/Bs+jqP4ARxlXzd46l0xFXc3gIwEL:V3GI4kVfZdsAC/Fo11nl0Pg73L

Score

10^/10

guloader remcos host-2 discovery downloader rat

Malware Config

Extracted

Family

remcos

Botnet

Host-2

C2

176.65.142.14:6060

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-HM3EZ8
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 family
guloader
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
Remcos family
remcos

Loads dropped DLL 2 IoCs

pid	Process
2396	DHL AWB and INV.scr.exe
2396	DHL AWB and INV.scr.exe

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

Web Service

T1102

flow	ioc
33	drive.google.com
34	drive.google.com

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2144	DHL AWB and INV.scr.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2396	DHL AWB and INV.scr.exe
2144	DHL AWB and INV.scr.exe

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Common Files\crepe\satanerne.ini	DHL AWB and INV.scr.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	DHL AWB and INV.scr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	DHL AWB and INV.scr.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2396	DHL AWB and INV.scr.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2144	DHL AWB and INV.scr.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2144	DHL AWB and INV.scr.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2396 wrote to memory of 2144	2396	DHL AWB and INV.scr.exe	95
PID 2396 wrote to memory of 2144	2396	DHL AWB and INV.scr.exe	95
PID 2396 wrote to memory of 2144	2396	DHL AWB and INV.scr.exe	95
PID 2396 wrote to memory of 2144	2396	DHL AWB and INV.scr.exe	95

C:\Users\Admin\AppData\Local\Temp\DHL AWB and INV.scr.exe
"C:\Users\Admin\AppData\Local\Temp\DHL AWB and INV.scr.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2396
- C:\Users\Admin\AppData\Local\Temp\DHL AWB and INV.scr.exe
  "C:\Users\Admin\AppData\Local\Temp\DHL AWB and INV.scr.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:2144

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:\Users\Admin\AppData\Local\Temp\nsg563F.tmp\System.dll

Filesize
11KB

MD5
a436db0c473a087eb61ff5c53c34ba27

SHA1
65ea67e424e75f5065132b539c8b2eda88aa0506

SHA256
75ed40311875312617d6711baed0be29fcaee71031ca27a8d308a72b15a51e49

SHA512
908f46a855480af6eacb2fb64de0e60b1e04bbb10b23992e2cf38a4cbebdcd7d3928c4c022d7ad9f7479265a8f426b93eef580afec95570e654c360d62f5e08d

Download Submit
memory/2144-38-0x00000000016E0000-0x0000000006124000-memory.dmp

Filesize
74.3MB

Download
memory/2144-41-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/2144-20-0x00000000016E0000-0x0000000006124000-memory.dmp

Filesize
74.3MB

Download
memory/2144-21-0x0000000077991000-0x0000000077AB1000-memory.dmp

Filesize
1.1MB

Download
memory/2144-22-0x0000000077A18000-0x0000000077A19000-memory.dmp

Filesize
4KB

Download
memory/2144-23-0x0000000077A35000-0x0000000077A36000-memory.dmp

Filesize
4KB

Download
memory/2144-33-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/2144-39-0x0000000077991000-0x0000000077AB1000-memory.dmp

Filesize
1.1MB

Download
memory/2144-34-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/2144-42-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/2144-51-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/2144-40-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/2144-50-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/2144-43-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/2144-44-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/2144-45-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/2144-46-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/2144-47-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/2144-48-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/2144-49-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/2396-18-0x0000000077991000-0x0000000077AB1000-memory.dmp

Filesize
1.1MB

Download
memory/2396-19-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download

Analysis

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