remcos | c6dc1f147e3592d6acd628c21f3dbef8cba6e6acbcfa7dd25a3bb8fc7f003a00

General

Target

TNT invoice 10.1.2024 .exe
Size

961KB
MD5

feee11842c3c5952aebf70fe162925e8
SHA1

13c393292e000ff9f543f4817034b33f9446c958
SHA256

15ef2164b480e330416ccfdc4a3265d61c7864990e65e9bb8078919a790eabee
SHA512

1dbfd469c79b86ecc3796c8cc5604964ddb8459720ab628f09bd294467d218bde6744a9fbdac3ec5ea64f3982687b0f0f6d6ce095b4e30523282ea58d5a4f5ea
SSDEEP

12288:sDVilInHpgfqAzSnyW6B8OH/csub28UtmlOUqIvgFau1Rjq+9AhdlNcEZu5B:BQH6fqAz7/esp+OUqIklHGzdfu5B

Score

10^/10

remcos irnserv1 discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

IRNSERV1

C2

irnserv1.ddns.net:4424

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
Rmc-20UF0Z
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

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
2940	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2536 set thread context of 2904	2536	TNT invoice 10.1.2024 .exe	35

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	TNT invoice 10.1.2024 .exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	TNT invoice 10.1.2024 .exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.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
2112	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2940	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2940	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2904	TNT invoice 10.1.2024 .exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2536 wrote to memory of 2940	2536	TNT invoice 10.1.2024 .exe	31
PID 2536 wrote to memory of 2940	2536	TNT invoice 10.1.2024 .exe	31
PID 2536 wrote to memory of 2940	2536	TNT invoice 10.1.2024 .exe	31
PID 2536 wrote to memory of 2940	2536	TNT invoice 10.1.2024 .exe	31
PID 2536 wrote to memory of 2112	2536	TNT invoice 10.1.2024 .exe	33
PID 2536 wrote to memory of 2112	2536	TNT invoice 10.1.2024 .exe	33
PID 2536 wrote to memory of 2112	2536	TNT invoice 10.1.2024 .exe	33
PID 2536 wrote to memory of 2112	2536	TNT invoice 10.1.2024 .exe	33
PID 2536 wrote to memory of 2904	2536	TNT invoice 10.1.2024 .exe	35
PID 2536 wrote to memory of 2904	2536	TNT invoice 10.1.2024 .exe	35
PID 2536 wrote to memory of 2904	2536	TNT invoice 10.1.2024 .exe	35
PID 2536 wrote to memory of 2904	2536	TNT invoice 10.1.2024 .exe	35
PID 2536 wrote to memory of 2904	2536	TNT invoice 10.1.2024 .exe	35
PID 2536 wrote to memory of 2904	2536	TNT invoice 10.1.2024 .exe	35
PID 2536 wrote to memory of 2904	2536	TNT invoice 10.1.2024 .exe	35
PID 2536 wrote to memory of 2904	2536	TNT invoice 10.1.2024 .exe	35
PID 2536 wrote to memory of 2904	2536	TNT invoice 10.1.2024 .exe	35
PID 2536 wrote to memory of 2904	2536	TNT invoice 10.1.2024 .exe	35
PID 2536 wrote to memory of 2904	2536	TNT invoice 10.1.2024 .exe	35
PID 2536 wrote to memory of 2904	2536	TNT invoice 10.1.2024 .exe	35
PID 2536 wrote to memory of 2904	2536	TNT invoice 10.1.2024 .exe	35

C:\Users\Admin\AppData\Local\Temp\TNT invoice 10.1.2024 .exe
"C:\Users\Admin\AppData\Local\Temp\TNT invoice 10.1.2024 .exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2536
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\PmjBkYpYKiwAz.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2940
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\PmjBkYpYKiwAz" /XML "C:\Users\Admin\AppData\Local\Temp\tmpE60B.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2112
- C:\Users\Admin\AppData\Local\Temp\TNT invoice 10.1.2024 .exe
  "C:\Users\Admin\AppData\Local\Temp\TNT invoice 10.1.2024 .exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:2904

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:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
104c9882092aaef8f45205ee27be138f

SHA1
89cc78435f4aa2d9ed0945ddd9d87d63d0a9b61a

SHA256
74e03f0f52026a77c64ae31373b4b877611294936c6f2140267f63377c9fa3c6

SHA512
fb7f67656665edb0e006bb9322f314a329e58b1ac9a5db88e4ff122dfb51e50f3da9393f718c7514e827367b4755426b8ae18a4f83501b1b18efcabcfc8928b1

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpE60B.tmp

Filesize
1KB

MD5
4cf8864821482bed2d0f32e67ed64295

SHA1
d8ded1bc6758ee19130d9a85303b5066b4e400dc

SHA256
43f6fce5df2ee391e16848dba372b0634c1055b8798c09721c053060f1dfa67f

SHA512
9c4b49e4ea959cf142ad4f93da1dc2732795f213e6f7e639c7ec1ff9de495cc8cb62006f61290c0864daba32a4a1217391c5098c41565d31d65e75d8f83e03a0

Download Submit
memory/2536-0-0x00000000740BE000-0x00000000740BF000-memory.dmp

Filesize
4KB

Download
memory/2536-1-0x0000000001240000-0x0000000001336000-memory.dmp

Filesize
984KB

Download
memory/2536-2-0x00000000740B0000-0x000000007479E000-memory.dmp

Filesize
6.9MB

Download
memory/2536-3-0x0000000000850000-0x000000000086E000-memory.dmp

Filesize
120KB

Download
memory/2536-4-0x00000000740BE000-0x00000000740BF000-memory.dmp

Filesize
4KB

Download
memory/2536-5-0x00000000740B0000-0x000000007479E000-memory.dmp

Filesize
6.9MB

Download
memory/2536-6-0x00000000051D0000-0x0000000005290000-memory.dmp

Filesize
768KB

Download
memory/2536-37-0x00000000740B0000-0x000000007479E000-memory.dmp

Filesize
6.9MB

Download
memory/2904-33-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2904-28-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2904-16-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2904-36-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2904-20-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2904-23-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2904-32-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2904-31-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2904-30-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2904-18-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2904-26-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2904-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2904-38-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2904-12-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2904-51-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2904-52-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2904-65-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2904-66-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads