guloader | 7755d0a9b88810b70be854e9dc58789c6d9379816834943c17ca10c71da9c8d5

General

Target

7755d0a9b88810b70be854e9dc58789c6d9379816834943c17ca10c71da9c8d5N.exe
Size

419KB
MD5

bbe69e2be2ecac52b7343471c5c8a3c0
SHA1

f51496e485649fb1741fc15917ae2c3ffa94de58
SHA256

7755d0a9b88810b70be854e9dc58789c6d9379816834943c17ca10c71da9c8d5
SHA512

de6cfd71d69873ce08b6c296a762f960daa8eae000f94115ed0e0589e63075e17862dfa55e285a6476b7ef04897dfd0f9ccc38af42becbf0b7c3047ad23a0540
SSDEEP

6144:jgORaSlHS/1FH9KK0CegbSaOfA3vNXGP00yYKv6TnJRWgzN:jgGlyn9KKd7bSlY3vNXGP/Kib+gzN

Score

10^/10

guloader remcos special discovery downloader persistence rat

Malware Config

Extracted

Family

remcos

Botnet

Special

C2

deadyh2849ijest.duckdns.org:8347

deadyh2849ijest.duckdns.org:37830

highestlotto.duckdns.org:37830

highestlotto.duckdns.org:8347

highest1lotto1.duckdns.org:8347

highest1lotto1.duckdns.org:37830

Attributes

audio_folder
MicRecords
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
true
install_flag
false
keylog_crypt
false
keylog_file
owqpboup.dat
keylog_flag
false
keylog_path
%AppData%
mouse_option
false
mutex
hlerpreits-R46NCA
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
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
3560	7755d0a9b88810b70be854e9dc58789c6d9379816834943c17ca10c71da9c8d5N.exe
3560	7755d0a9b88810b70be854e9dc58789c6d9379816834943c17ca10c71da9c8d5N.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Geotectology = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Approksimer\\vense.exe"	7755d0a9b88810b70be854e9dc58789c6d9379816834943c17ca10c71da9c8d5N.exe

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

Web Service

T1102

flow	ioc
19	drive.google.com
20	drive.google.com

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\leiotrichine.cra	7755d0a9b88810b70be854e9dc58789c6d9379816834943c17ca10c71da9c8d5N.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
1908	7755d0a9b88810b70be854e9dc58789c6d9379816834943c17ca10c71da9c8d5N.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
3560	7755d0a9b88810b70be854e9dc58789c6d9379816834943c17ca10c71da9c8d5N.exe
1908	7755d0a9b88810b70be854e9dc58789c6d9379816834943c17ca10c71da9c8d5N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3560 set thread context of 1908	3560	7755d0a9b88810b70be854e9dc58789c6d9379816834943c17ca10c71da9c8d5N.exe	89

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\unneutralize.Exe	7755d0a9b88810b70be854e9dc58789c6d9379816834943c17ca10c71da9c8d5N.exe
File opened for modification	C:\Program Files (x86)\Common Files\Indhak.non	7755d0a9b88810b70be854e9dc58789c6d9379816834943c17ca10c71da9c8d5N.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\0409\inspicalr\casimeres.ini	7755d0a9b88810b70be854e9dc58789c6d9379816834943c17ca10c71da9c8d5N.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	7755d0a9b88810b70be854e9dc58789c6d9379816834943c17ca10c71da9c8d5N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	7755d0a9b88810b70be854e9dc58789c6d9379816834943c17ca10c71da9c8d5N.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
3560	7755d0a9b88810b70be854e9dc58789c6d9379816834943c17ca10c71da9c8d5N.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1908	7755d0a9b88810b70be854e9dc58789c6d9379816834943c17ca10c71da9c8d5N.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3560 wrote to memory of 1908	3560	7755d0a9b88810b70be854e9dc58789c6d9379816834943c17ca10c71da9c8d5N.exe	89
PID 3560 wrote to memory of 1908	3560	7755d0a9b88810b70be854e9dc58789c6d9379816834943c17ca10c71da9c8d5N.exe	89
PID 3560 wrote to memory of 1908	3560	7755d0a9b88810b70be854e9dc58789c6d9379816834943c17ca10c71da9c8d5N.exe	89
PID 3560 wrote to memory of 1908	3560	7755d0a9b88810b70be854e9dc58789c6d9379816834943c17ca10c71da9c8d5N.exe	89
PID 3560 wrote to memory of 1908	3560	7755d0a9b88810b70be854e9dc58789c6d9379816834943c17ca10c71da9c8d5N.exe	89

C:\Users\Admin\AppData\Local\Temp\7755d0a9b88810b70be854e9dc58789c6d9379816834943c17ca10c71da9c8d5N.exe
"C:\Users\Admin\AppData\Local\Temp\7755d0a9b88810b70be854e9dc58789c6d9379816834943c17ca10c71da9c8d5N.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- 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:3560
- C:\Users\Admin\AppData\Local\Temp\7755d0a9b88810b70be854e9dc58789c6d9379816834943c17ca10c71da9c8d5N.exe
  "C:\Users\Admin\AppData\Local\Temp\7755d0a9b88810b70be854e9dc58789c6d9379816834943c17ca10c71da9c8d5N.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:1908

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsn9A6D.tmp\System.dll

Filesize
12KB

MD5
564bb0373067e1785cba7e4c24aab4bf

SHA1
7c9416a01d821b10b2eef97b80899d24014d6fc1

SHA256
7a9ddee34562cd3703f1502b5c70e99cd5bba15de2b6845a3555033d7f6cb2a5

SHA512
22c61a323cb9293d7ec5c7e7e60674d0e2f7b29d55be25eb3c128ea2cd7440a1400cee17c43896b996278007c0d247f331a9b8964e3a40a0eb1404a9596c4472

Download Submit
memory/1908-34-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/1908-21-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/1908-51-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/1908-17-0x00000000016F0000-0x0000000005C90000-memory.dmp

Filesize
69.6MB

Download
memory/1908-38-0x0000000077171000-0x0000000077291000-memory.dmp

Filesize
1.1MB

Download
memory/1908-19-0x0000000077171000-0x0000000077291000-memory.dmp

Filesize
1.1MB

Download
memory/1908-50-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/1908-46-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/1908-18-0x00000000771F8000-0x00000000771F9000-memory.dmp

Filesize
4KB

Download
memory/1908-40-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/1908-43-0x0000000077171000-0x0000000077291000-memory.dmp

Filesize
1.1MB

Download
memory/1908-44-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/1908-45-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/3560-14-0x0000000077171000-0x0000000077291000-memory.dmp

Filesize
1.1MB

Download
memory/3560-16-0x0000000073DC5000-0x0000000073DC6000-memory.dmp

Filesize
4KB

Download
memory/3560-15-0x0000000077171000-0x0000000077291000-memory.dmp

Filesize
1.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads