remcos | b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e

General

Target

REF 220-331.exe
Size

863KB
MD5

1c2a46d46812b1424ad44ac59b4c8d9a
SHA1

ad2822fc0804fad19c1d959f02c0011d80a7ab4c
SHA256

b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e
SHA512

0e3107208813adb9ca79720bea24dcc333bff9c7bc084b31a7abc92ecb1d09ed7deffe9014d0b85f4154aad6499d626eec85e0f43c570954afd437151219bc39
SSDEEP

24576:D1YaXjYr93cjbHRtEmWHs7FK5WQSDndP:D13MrhcjbHRWmh7c5MDdP

Score

10^/10

remcos 3456789 discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

3456789

C2

172.93.220.148:45682

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
false
install_flag
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
765-8M14I5
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
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

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2204	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2216 set thread context of 2668	2216	REF 220-331.exe	34

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 4 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	REF 220-331.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	REF 220-331.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2672	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2204	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2204	powershell.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2216 wrote to memory of 2204	2216	REF 220-331.exe	30
PID 2216 wrote to memory of 2204	2216	REF 220-331.exe	30
PID 2216 wrote to memory of 2204	2216	REF 220-331.exe	30
PID 2216 wrote to memory of 2204	2216	REF 220-331.exe	30
PID 2216 wrote to memory of 2672	2216	REF 220-331.exe	32
PID 2216 wrote to memory of 2672	2216	REF 220-331.exe	32
PID 2216 wrote to memory of 2672	2216	REF 220-331.exe	32
PID 2216 wrote to memory of 2672	2216	REF 220-331.exe	32
PID 2216 wrote to memory of 2668	2216	REF 220-331.exe	34
PID 2216 wrote to memory of 2668	2216	REF 220-331.exe	34
PID 2216 wrote to memory of 2668	2216	REF 220-331.exe	34
PID 2216 wrote to memory of 2668	2216	REF 220-331.exe	34
PID 2216 wrote to memory of 2668	2216	REF 220-331.exe	34
PID 2216 wrote to memory of 2668	2216	REF 220-331.exe	34
PID 2216 wrote to memory of 2668	2216	REF 220-331.exe	34
PID 2216 wrote to memory of 2668	2216	REF 220-331.exe	34
PID 2216 wrote to memory of 2668	2216	REF 220-331.exe	34
PID 2216 wrote to memory of 2668	2216	REF 220-331.exe	34
PID 2216 wrote to memory of 2668	2216	REF 220-331.exe	34
PID 2216 wrote to memory of 2668	2216	REF 220-331.exe	34
PID 2216 wrote to memory of 2668	2216	REF 220-331.exe	34

C:\Users\Admin\AppData\Local\Temp\REF 220-331.exe
"C:\Users\Admin\AppData\Local\Temp\REF 220-331.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2216
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\fBvNwiRO.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2204
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\fBvNwiRO" /XML "C:\Users\Admin\AppData\Local\Temp\tmpB4AF.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2672
- C:\Users\Admin\AppData\Local\Temp\REF 220-331.exe
  "C:\Users\Admin\AppData\Local\Temp\REF 220-331.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2668

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

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

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpB4AF.tmp

Filesize
1KB

MD5
84dee005f908c4614bd3794d8e1f330b

SHA1
9732dbf6a23d53284a419ac167a7ac9674c60e93

SHA256
c1897ab610fa22d861db8200bf618abbeb61f25c90dc4e89cb2417b1bfc7e6ec

SHA512
c5b0af9fc211714e7a99bb79a6d32ca46297c140933eac7d970d28d40d7c372ead83b5f1719d70854685de0ceae751d7554aa9b05ad74f114e29973cf96de91d

Download Submit
memory/2216-0-0x0000000073F1E000-0x0000000073F1F000-memory.dmp

Filesize
4KB

Download
memory/2216-1-0x00000000012F0000-0x00000000013CC000-memory.dmp

Filesize
880KB

Download
memory/2216-2-0x0000000073F10000-0x00000000745FE000-memory.dmp

Filesize
6.9MB

Download
memory/2216-3-0x0000000000480000-0x000000000048E000-memory.dmp

Filesize
56KB

Download
memory/2216-4-0x0000000073F1E000-0x0000000073F1F000-memory.dmp

Filesize
4KB

Download
memory/2216-5-0x0000000073F10000-0x00000000745FE000-memory.dmp

Filesize
6.9MB

Download
memory/2216-6-0x0000000005310000-0x00000000053CE000-memory.dmp

Filesize
760KB

Download
memory/2216-35-0x0000000073F10000-0x00000000745FE000-memory.dmp

Filesize
6.9MB

Download
memory/2668-26-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2668-36-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2668-33-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2668-32-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2668-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2668-30-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2668-28-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2668-14-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2668-24-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2668-20-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2668-18-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2668-16-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2668-22-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2668-34-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2668-37-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2668-38-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2668-40-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2668-41-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2668-42-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2668-43-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2668-44-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2668-45-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2668-46-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2668-47-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2668-48-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads