remcos | 77f41b2f785bd720e1461e1a1ab968ffe620d683d448457c22f4620b890732e7

General

Target

springlock.exe
Size

1.3MB
MD5

6cf41ecfa205a9b8e3eca92fe2a0017d
SHA1

d92c17c9045f0ec9557dd896e238737d51d12dab
SHA256

77f41b2f785bd720e1461e1a1ab968ffe620d683d448457c22f4620b890732e7
SHA512

5eebfdc122493d78ea7e3e11798c3ec2aa0eaf57e77d786e1c5740a1fb7ca7d1b4c849ecf105ec0a0b1bd7f539acf8c40f3ef2940c819c481ea32995985509f5
SSDEEP

24576:Ru6J33O0c+JY5UZ+XC0kGso6FaSNvEFhDgSHthSQ98DcjceDvWY:Du0c++OCvkGs9FaSN2Vg+tQXLY

Score

10^/10

remcos remotehost discovery rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

103.83.87.190:5817

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-E1OC2H
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
false
take_screenshot_time
5

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Remcos family
remcos

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\springlock.vbs	springlock.exe

Executes dropped EXE 1 IoCs

pid	Process
4756	springlock.exe

AutoIT Executable 2 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/memory/5248-6-0x00000000013E0000-0x00000000017E0000-memory.dmp	autoit_exe
behavioral1/files/0x0007000000022ecf-9.dat	autoit_exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4756 set thread context of 4676	4756	springlock.exe	91

System Location Discovery: System Language Discovery 1 TTPs 3 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	springlock.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	springlock.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
4756	springlock.exe

Suspicious use of FindShellTrayWindow 5 IoCs

pid	Process
5248	springlock.exe
5248	springlock.exe
4756	springlock.exe
4756	springlock.exe
4676	svchost.exe

Suspicious use of SendNotifyMessage 5 IoCs

pid	Process
5248	springlock.exe
5248	springlock.exe
4756	springlock.exe
4756	springlock.exe
4676	svchost.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 5248 wrote to memory of 4756	5248	springlock.exe	90
PID 5248 wrote to memory of 4756	5248	springlock.exe	90
PID 5248 wrote to memory of 4756	5248	springlock.exe	90
PID 4756 wrote to memory of 4676	4756	springlock.exe	91
PID 4756 wrote to memory of 4676	4756	springlock.exe	91
PID 4756 wrote to memory of 4676	4756	springlock.exe	91
PID 4756 wrote to memory of 4676	4756	springlock.exe	91

C:\Users\Admin\AppData\Local\Temp\springlock.exe
"C:\Users\Admin\AppData\Local\Temp\springlock.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:5248
- C:\Users\Admin\AppData\Local\avenses\springlock.exe
  "C:\Users\Admin\AppData\Local\Temp\springlock.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:4756
- - C:\Windows\SysWOW64\svchost.exe
    "C:\Users\Admin\AppData\Local\Temp\springlock.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of FindShellTrayWindow
    - Suspicious use of SendNotifyMessage
    PID:4676

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

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:\Users\Admin\AppData\Local\avenses\springlock.exe

Filesize
1.3MB

MD5
6cf41ecfa205a9b8e3eca92fe2a0017d

SHA1
d92c17c9045f0ec9557dd896e238737d51d12dab

SHA256
77f41b2f785bd720e1461e1a1ab968ffe620d683d448457c22f4620b890732e7

SHA512
5eebfdc122493d78ea7e3e11798c3ec2aa0eaf57e77d786e1c5740a1fb7ca7d1b4c849ecf105ec0a0b1bd7f539acf8c40f3ef2940c819c481ea32995985509f5

Download Submit
memory/4676-28-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4676-29-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4676-20-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4676-21-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4676-22-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4676-23-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4676-24-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4676-25-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4676-26-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4676-30-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4676-39-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4676-38-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4676-27-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4676-31-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4676-32-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4676-33-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4676-34-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4676-35-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4676-36-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4676-37-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4756-18-0x00000000012E0000-0x00000000016E0000-memory.dmp

Filesize
4.0MB

Download
memory/5248-6-0x00000000013E0000-0x00000000017E0000-memory.dmp

Filesize
4.0MB

Download

Analysis

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