remcos | e3b98444fa75091950ae3e074aa7904e254152197164775f236a4277f53b2b5b

General

Target

e3b98444fa75091950ae3e074aa7904e254152197164775f236a4277f53b2b5bN.exe
Size

2.1MB
MD5

d365bdd9aae938e7e7f01e64539c55d0
SHA1

88fa077545b9d3470047a93b0a60733826c84ac8
SHA256

e3b98444fa75091950ae3e074aa7904e254152197164775f236a4277f53b2b5b
SHA512

27728711291d0a5bcffb8f66706efcc310caa504dbfa24f4cd8342c2ec05fbb27b22ed7c5b889908621ef1cd686a57657c57a88e36d2715f7d7afd99d6bba026
SSDEEP

24576:bD39v74lfGQrFUspugRNJI2DJ53J/J/L5dJPjYF4avnXJJjRH7:bp7E+QrFUBgq2SnJ7

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

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-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\International\Geo\Nation	e3b98444fa75091950ae3e074aa7904e254152197164775f236a4277f53b2b5bN.exe

Executes dropped EXE 2 IoCs

pid	Process
2256	sbietrcl.exe
4568	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-1-5-21-2718105630-359604950-2820636825-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Application = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Templates\\sbietrcl.exe"	e3b98444fa75091950ae3e074aa7904e254152197164775f236a4277f53b2b5bN.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2256 set thread context of 4568	2256	sbietrcl.exe	90

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	e3b98444fa75091950ae3e074aa7904e254152197164775f236a4277f53b2b5bN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sbietrcl.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
4296	e3b98444fa75091950ae3e074aa7904e254152197164775f236a4277f53b2b5bN.exe
4296	e3b98444fa75091950ae3e074aa7904e254152197164775f236a4277f53b2b5bN.exe
4296	e3b98444fa75091950ae3e074aa7904e254152197164775f236a4277f53b2b5bN.exe
4296	e3b98444fa75091950ae3e074aa7904e254152197164775f236a4277f53b2b5bN.exe
4296	e3b98444fa75091950ae3e074aa7904e254152197164775f236a4277f53b2b5bN.exe
4296	e3b98444fa75091950ae3e074aa7904e254152197164775f236a4277f53b2b5bN.exe
2256	sbietrcl.exe
2256	sbietrcl.exe
2256	sbietrcl.exe
2256	sbietrcl.exe
2256	sbietrcl.exe
2256	sbietrcl.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4296	e3b98444fa75091950ae3e074aa7904e254152197164775f236a4277f53b2b5bN.exe
Token: SeDebugPrivilege	2256	sbietrcl.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4296 wrote to memory of 2256	4296	e3b98444fa75091950ae3e074aa7904e254152197164775f236a4277f53b2b5bN.exe	87
PID 4296 wrote to memory of 2256	4296	e3b98444fa75091950ae3e074aa7904e254152197164775f236a4277f53b2b5bN.exe	87
PID 4296 wrote to memory of 2256	4296	e3b98444fa75091950ae3e074aa7904e254152197164775f236a4277f53b2b5bN.exe	87
PID 2256 wrote to memory of 4568	2256	sbietrcl.exe	90
PID 2256 wrote to memory of 4568	2256	sbietrcl.exe	90
PID 2256 wrote to memory of 4568	2256	sbietrcl.exe	90
PID 2256 wrote to memory of 4568	2256	sbietrcl.exe	90
PID 2256 wrote to memory of 4568	2256	sbietrcl.exe	90
PID 2256 wrote to memory of 4568	2256	sbietrcl.exe	90
PID 2256 wrote to memory of 4568	2256	sbietrcl.exe	90
PID 2256 wrote to memory of 4568	2256	sbietrcl.exe	90
PID 2256 wrote to memory of 4568	2256	sbietrcl.exe	90

C:\Users\Admin\AppData\Local\Temp\e3b98444fa75091950ae3e074aa7904e254152197164775f236a4277f53b2b5bN.exe
"C:\Users\Admin\AppData\Local\Temp\e3b98444fa75091950ae3e074aa7904e254152197164775f236a4277f53b2b5bN.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:4296
- 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:2256
- - 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:4568

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
2.2MB

MD5
d4d813202b3b8df80ee36b19fc647905

SHA1
06baf701001839757795e5b38fa32c8f76fb5fbc

SHA256
73e743d988c5e95cbbac76b54e19ff88ae920cdb77eb5afaae2be09c7912d9cf

SHA512
738922e93fbb7b487b8d5a019c814a6732b542fe8ead369a22b44efc42d37d768d7be520bb4013d2cb568bc92ae2dc93d40e99e95f4a392f7f2571fc15805b88

Download Submit
memory/2256-40-0x0000000074C00000-0x00000000751B1000-memory.dmp

Filesize
5.7MB

Download
memory/2256-34-0x0000000074C00000-0x00000000751B1000-memory.dmp

Filesize
5.7MB

Download
memory/2256-33-0x0000000074C00000-0x00000000751B1000-memory.dmp

Filesize
5.7MB

Download
memory/2256-32-0x0000000074C00000-0x00000000751B1000-memory.dmp

Filesize
5.7MB

Download
memory/2256-31-0x0000000074C00000-0x00000000751B1000-memory.dmp

Filesize
5.7MB

Download
memory/4296-19-0x0000000074C00000-0x00000000751B1000-memory.dmp

Filesize
5.7MB

Download
memory/4296-0-0x0000000074C02000-0x0000000074C03000-memory.dmp

Filesize
4KB

Download
memory/4296-18-0x0000000074C02000-0x0000000074C03000-memory.dmp

Filesize
4KB

Download
memory/4296-30-0x0000000074C00000-0x00000000751B1000-memory.dmp

Filesize
5.7MB

Download
memory/4296-6-0x0000000074C00000-0x00000000751B1000-memory.dmp

Filesize
5.7MB

Download
memory/4296-5-0x0000000074C00000-0x00000000751B1000-memory.dmp

Filesize
5.7MB

Download
memory/4296-2-0x0000000074C00000-0x00000000751B1000-memory.dmp

Filesize
5.7MB

Download
memory/4296-1-0x0000000074C00000-0x00000000751B1000-memory.dmp

Filesize
5.7MB

Download
memory/4568-36-0x00000000005A0000-0x00000000005B7000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads