remcos | c35b7a09b11fde91e3e665b53f63b1843b8e91bcd361614c7cc14e9be3cd31f2

General

Target

c35b7a09b11fde91e3e665b53f63b1843b8e91bcd361614c7cc14e9be3cd31f2.exe
Size

1.5MB
MD5

bb057a39731b995515ae1fb31aab8997
SHA1

c818a0e6f6d492c53956b56a0021b4e7ceeac969
SHA256

c35b7a09b11fde91e3e665b53f63b1843b8e91bcd361614c7cc14e9be3cd31f2
SHA512

d727bf1e6dd02b9779072444ebec0fa6b4f98251b09541431bc13710b1ec60764412d5ffd892a11adf82b2e62af302dfd05fc57d2b1e702b5d0fdebfc817ad66
SSDEEP

24576:6D39dlfGQrFUspugRNJI2DJnUw9W/j+BeKJlO/a:6F+QrFUBgq25eKX

Score

10^/10

remcos host discovery persistence rat

Malware Config

Extracted

Family

remcos

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-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	c35b7a09b11fde91e3e665b53f63b1843b8e91bcd361614c7cc14e9be3cd31f2.exe

Executes dropped EXE 2 IoCs

pid	Process
1008	sbietrcl.exe
5068	sbietrcl.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-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Application = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Templates\\sbietrcl.exe"	c35b7a09b11fde91e3e665b53f63b1843b8e91bcd361614c7cc14e9be3cd31f2.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1008 set thread context of 5068	1008	sbietrcl.exe	85

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	c35b7a09b11fde91e3e665b53f63b1843b8e91bcd361614c7cc14e9be3cd31f2.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sbietrcl.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
1436	c35b7a09b11fde91e3e665b53f63b1843b8e91bcd361614c7cc14e9be3cd31f2.exe
1436	c35b7a09b11fde91e3e665b53f63b1843b8e91bcd361614c7cc14e9be3cd31f2.exe
1436	c35b7a09b11fde91e3e665b53f63b1843b8e91bcd361614c7cc14e9be3cd31f2.exe
1436	c35b7a09b11fde91e3e665b53f63b1843b8e91bcd361614c7cc14e9be3cd31f2.exe
1436	c35b7a09b11fde91e3e665b53f63b1843b8e91bcd361614c7cc14e9be3cd31f2.exe
1436	c35b7a09b11fde91e3e665b53f63b1843b8e91bcd361614c7cc14e9be3cd31f2.exe
1008	sbietrcl.exe
1008	sbietrcl.exe
1008	sbietrcl.exe
1008	sbietrcl.exe
1008	sbietrcl.exe
1008	sbietrcl.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1436	c35b7a09b11fde91e3e665b53f63b1843b8e91bcd361614c7cc14e9be3cd31f2.exe
Token: SeDebugPrivilege	1008	sbietrcl.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1436 wrote to memory of 1008	1436	c35b7a09b11fde91e3e665b53f63b1843b8e91bcd361614c7cc14e9be3cd31f2.exe	82
PID 1436 wrote to memory of 1008	1436	c35b7a09b11fde91e3e665b53f63b1843b8e91bcd361614c7cc14e9be3cd31f2.exe	82
PID 1436 wrote to memory of 1008	1436	c35b7a09b11fde91e3e665b53f63b1843b8e91bcd361614c7cc14e9be3cd31f2.exe	82
PID 1008 wrote to memory of 5068	1008	sbietrcl.exe	85
PID 1008 wrote to memory of 5068	1008	sbietrcl.exe	85
PID 1008 wrote to memory of 5068	1008	sbietrcl.exe	85
PID 1008 wrote to memory of 5068	1008	sbietrcl.exe	85
PID 1008 wrote to memory of 5068	1008	sbietrcl.exe	85
PID 1008 wrote to memory of 5068	1008	sbietrcl.exe	85
PID 1008 wrote to memory of 5068	1008	sbietrcl.exe	85
PID 1008 wrote to memory of 5068	1008	sbietrcl.exe	85
PID 1008 wrote to memory of 5068	1008	sbietrcl.exe	85

C:\Users\Admin\AppData\Local\Temp\c35b7a09b11fde91e3e665b53f63b1843b8e91bcd361614c7cc14e9be3cd31f2.exe
"C:\Users\Admin\AppData\Local\Temp\c35b7a09b11fde91e3e665b53f63b1843b8e91bcd361614c7cc14e9be3cd31f2.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:1436
- 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:1008
- - C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe
    "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe"
    3⤵
    - Executes dropped EXE
    PID:5068

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

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
1.5MB

MD5
0a18ffc0fb0c1cbaa8e90f74276bc2d3

SHA1
77f870016f8bf88d34f4c472bfcd98fcb74a929e

SHA256
e92543adcf7b417c0f912edae8c1b1d02d5f8c11f82ff28e38e3e58c69f6bdf6

SHA512
b768fc56340b863f1f7a387d53675af5b721eb684b6fc9cb2d9cedf4858408e410ea8e8995a963b88dadc8d14519ffd12c13b3339a3a6b45181b688da560ae51

Download Submit
memory/1008-40-0x0000000074E90000-0x0000000075441000-memory.dmp

Filesize
5.7MB

Download
memory/1008-34-0x0000000074E90000-0x0000000075441000-memory.dmp

Filesize
5.7MB

Download
memory/1008-33-0x0000000074E90000-0x0000000075441000-memory.dmp

Filesize
5.7MB

Download
memory/1008-32-0x0000000074E90000-0x0000000075441000-memory.dmp

Filesize
5.7MB

Download
memory/1008-31-0x0000000074E90000-0x0000000075441000-memory.dmp

Filesize
5.7MB

Download
memory/1436-5-0x0000000074E90000-0x0000000075441000-memory.dmp

Filesize
5.7MB

Download
memory/1436-19-0x0000000074E90000-0x0000000075441000-memory.dmp

Filesize
5.7MB

Download
memory/1436-30-0x0000000074E90000-0x0000000075441000-memory.dmp

Filesize
5.7MB

Download
memory/1436-18-0x0000000074E92000-0x0000000074E93000-memory.dmp

Filesize
4KB

Download
memory/1436-6-0x0000000074E90000-0x0000000075441000-memory.dmp

Filesize
5.7MB

Download
memory/1436-0-0x0000000074E92000-0x0000000074E93000-memory.dmp

Filesize
4KB

Download
memory/1436-2-0x0000000074E90000-0x0000000075441000-memory.dmp

Filesize
5.7MB

Download
memory/1436-1-0x0000000074E90000-0x0000000075441000-memory.dmp

Filesize
5.7MB

Download
memory/5068-36-0x0000000000560000-0x0000000000577000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads