remcos | a07bf67c7d1ee19cea84d7e54681b732471db08588e08eaa64e2c3d3e60a74ed

General

Target

a07bf67c7d1ee19cea84d7e54681b732471db08588e08eaa64e2c3d3e60a74ed.exe
Size

933KB
MD5

b6ac42cf48a2543935d5d40075f5fd14
SHA1

93bc000564f1c4eb583d75db7f15aab972458fc8
SHA256

a07bf67c7d1ee19cea84d7e54681b732471db08588e08eaa64e2c3d3e60a74ed
SHA512

665540a63ebbf407737cee76b0e74cdeb66aa7102036c51762b02c4e66575beff6df08bc58954572d672b76aa7da4e54ffa5761b30bda43fcfdcc8437f4e7f98
SSDEEP

12288:0p+rgRNyA55IxJ+feDOa9rZj5XqkJD0QrOod7XxlW91RRzwAY3A5:0pugRNJI1D39dlfGQrFUxwAeA5

Score

10^/10

remcos host discovery persistence rat spyware stealer

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

C2

213.183.58.19:4000

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
remcos.exe
copy_folder
remcos
delete_file
false
hide_file
false
hide_keylog_file
true
install_flag
false
install_path
%AppData%
keylog_crypt
true
keylog_file
read.dat
keylog_flag
false
keylog_folder
CastC
keylog_path
%AppData%
mouse_option
false
mutex
remcos_sccafsoidz
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screens
screenshot_path
%AppData%
screenshot_time
1
startup_value
remcos
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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1062200478-553497403-3857448183-1000\Control Panel\International\Geo\Nation	a07bf67c7d1ee19cea84d7e54681b732471db08588e08eaa64e2c3d3e60a74ed.exe

Executes dropped EXE 2 IoCs

pid	Process
4828	sbietrcl.exe
5604	sbietrcl.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

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-1-5-21-1062200478-553497403-3857448183-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Application = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Templates\\sbietrcl.exe"	a07bf67c7d1ee19cea84d7e54681b732471db08588e08eaa64e2c3d3e60a74ed.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4828 set thread context of 5604	4828	sbietrcl.exe	96

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 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	a07bf67c7d1ee19cea84d7e54681b732471db08588e08eaa64e2c3d3e60a74ed.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sbietrcl.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sbietrcl.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
320	a07bf67c7d1ee19cea84d7e54681b732471db08588e08eaa64e2c3d3e60a74ed.exe
320	a07bf67c7d1ee19cea84d7e54681b732471db08588e08eaa64e2c3d3e60a74ed.exe
320	a07bf67c7d1ee19cea84d7e54681b732471db08588e08eaa64e2c3d3e60a74ed.exe
320	a07bf67c7d1ee19cea84d7e54681b732471db08588e08eaa64e2c3d3e60a74ed.exe
320	a07bf67c7d1ee19cea84d7e54681b732471db08588e08eaa64e2c3d3e60a74ed.exe
320	a07bf67c7d1ee19cea84d7e54681b732471db08588e08eaa64e2c3d3e60a74ed.exe
4828	sbietrcl.exe
4828	sbietrcl.exe
4828	sbietrcl.exe
4828	sbietrcl.exe
4828	sbietrcl.exe
4828	sbietrcl.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	320	a07bf67c7d1ee19cea84d7e54681b732471db08588e08eaa64e2c3d3e60a74ed.exe
Token: SeDebugPrivilege	4828	sbietrcl.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5604	sbietrcl.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 320 wrote to memory of 4828	320	a07bf67c7d1ee19cea84d7e54681b732471db08588e08eaa64e2c3d3e60a74ed.exe	95
PID 320 wrote to memory of 4828	320	a07bf67c7d1ee19cea84d7e54681b732471db08588e08eaa64e2c3d3e60a74ed.exe	95
PID 320 wrote to memory of 4828	320	a07bf67c7d1ee19cea84d7e54681b732471db08588e08eaa64e2c3d3e60a74ed.exe	95
PID 4828 wrote to memory of 5604	4828	sbietrcl.exe	96
PID 4828 wrote to memory of 5604	4828	sbietrcl.exe	96
PID 4828 wrote to memory of 5604	4828	sbietrcl.exe	96
PID 4828 wrote to memory of 5604	4828	sbietrcl.exe	96
PID 4828 wrote to memory of 5604	4828	sbietrcl.exe	96
PID 4828 wrote to memory of 5604	4828	sbietrcl.exe	96
PID 4828 wrote to memory of 5604	4828	sbietrcl.exe	96
PID 4828 wrote to memory of 5604	4828	sbietrcl.exe	96
PID 4828 wrote to memory of 5604	4828	sbietrcl.exe	96

C:\Users\Admin\AppData\Local\Temp\a07bf67c7d1ee19cea84d7e54681b732471db08588e08eaa64e2c3d3e60a74ed.exe
"C:\Users\Admin\AppData\Local\Temp\a07bf67c7d1ee19cea84d7e54681b732471db08588e08eaa64e2c3d3e60a74ed.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:320
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4828
- - C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe
    "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:5604

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

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe

Filesize
942KB

MD5
91e3afd9253229801392273fcbd4cb99

SHA1
68a402abeb2dff5cc92ed89f808671bc9eb7f39d

SHA256
225e0907d9a12469ee821302963855e3880b0f81a0b988768c29f087de19870a

SHA512
88bb57242b7880e24ebec4fd4024a8833daea421d4292c6d5f916edd520b11ac091343da5ec07a02bc93548e917b7838d4e720cc9bd92c9dde694077874d3748

Download Submit
memory/320-0-0x0000000075402000-0x0000000075403000-memory.dmp

Filesize
4KB

Download
memory/320-1-0x0000000075400000-0x00000000759B1000-memory.dmp

Filesize
5.7MB

Download
memory/320-2-0x0000000075400000-0x00000000759B1000-memory.dmp

Filesize
5.7MB

Download
memory/320-5-0x0000000075400000-0x00000000759B1000-memory.dmp

Filesize
5.7MB

Download
memory/320-6-0x0000000075400000-0x00000000759B1000-memory.dmp

Filesize
5.7MB

Download
memory/320-18-0x0000000075400000-0x00000000759B1000-memory.dmp

Filesize
5.7MB

Download
memory/320-19-0x0000000075402000-0x0000000075403000-memory.dmp

Filesize
4KB

Download
memory/320-30-0x0000000075400000-0x00000000759B1000-memory.dmp

Filesize
5.7MB

Download
memory/4828-33-0x0000000075400000-0x00000000759B1000-memory.dmp

Filesize
5.7MB

Download
memory/4828-32-0x0000000075400000-0x00000000759B1000-memory.dmp

Filesize
5.7MB

Download
memory/4828-31-0x0000000075400000-0x00000000759B1000-memory.dmp

Filesize
5.7MB

Download
memory/4828-34-0x0000000075400000-0x00000000759B1000-memory.dmp

Filesize
5.7MB

Download
memory/4828-35-0x0000000075400000-0x00000000759B1000-memory.dmp

Filesize
5.7MB

Download
memory/4828-47-0x0000000075400000-0x00000000759B1000-memory.dmp

Filesize
5.7MB

Download
memory/5604-36-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/5604-39-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/5604-40-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/5604-44-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/5604-46-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/5604-50-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads