remcos | d2f787be13758751d4f892c5d06477ef18f3c63adb8fe5a7ac675c9cd9bd749a

General

Target

tmp.exe
Size

2.2MB
MD5

163a36cd5f528caff118561c41240852
SHA1

4ff998c1bc785941acb567cdd21d657069e2f271
SHA256

d2f787be13758751d4f892c5d06477ef18f3c63adb8fe5a7ac675c9cd9bd749a
SHA512

481fcaa6869b5edbccb964cd7134bbbd0426def51b64ef2115d0af11795f1d481deb438e007891dcb4cddde09c8b9617603daeb913f44daa8abbb27c445c3d18
SSDEEP

24576:h8RiqGGj95kr7Ad2gE7pbTFxCqeu6tHHe8tKaKFDjo5ppPK4os+jrGFLrFu/C6VE:I23Kqed+YkFDULr8qmmnosrD38CPL

Score

10^/10

remcos friday old host rat

Malware Config

Extracted

Family

remcos

Botnet

FRIDAY oLd Host

C2

aryexpcrt.ddns.net:3216

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-MP1M7K
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
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

Processes:

tmp.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation tmp.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

tmp.exe

description pid process target process

PID 1976 set thread context of 4344 1976 tmp.exe tmp.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

powershell.exe

pid process

3988 powershell.exe
3988 powershell.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

tmp.exepowershell.exe

description pid process

Token: SeDebugPrivilege 1976 tmp.exe
Token: SeDebugPrivilege 3988 powershell.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

tmp.exe

pid process

4344 tmp.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	tmp.exe

description	pid	process	target process
PID 1976 set thread context of 4344	1976	tmp.exe	tmp.exe

pid	process
3988	powershell.exe
3988	powershell.exe

description	pid	process
Token: SeDebugPrivilege	1976	tmp.exe
Token: SeDebugPrivilege	3988	powershell.exe

pid	process
4344	tmp.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

tmp.exe

description	pid	process	target process
PID 1976 wrote to memory of 3988	1976	tmp.exe	powershell.exe
PID 1976 wrote to memory of 3988	1976	tmp.exe	powershell.exe
PID 1976 wrote to memory of 3988	1976	tmp.exe	powershell.exe
PID 1976 wrote to memory of 4344	1976	tmp.exe	tmp.exe
PID 1976 wrote to memory of 4344	1976	tmp.exe	tmp.exe
PID 1976 wrote to memory of 4344	1976	tmp.exe	tmp.exe
PID 1976 wrote to memory of 4344	1976	tmp.exe	tmp.exe
PID 1976 wrote to memory of 4344	1976	tmp.exe	tmp.exe
PID 1976 wrote to memory of 4344	1976	tmp.exe	tmp.exe
PID 1976 wrote to memory of 4344	1976	tmp.exe	tmp.exe
PID 1976 wrote to memory of 4344	1976	tmp.exe	tmp.exe
PID 1976 wrote to memory of 4344	1976	tmp.exe	tmp.exe
PID 1976 wrote to memory of 4344	1976	tmp.exe	tmp.exe
PID 1976 wrote to memory of 4344	1976	tmp.exe	tmp.exe
PID 1976 wrote to memory of 4344	1976	tmp.exe	tmp.exe

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1976

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMwA1AA==
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3988

C:\Users\Admin\AppData\Local\Temp\tmp.exe
C:\Users\Admin\AppData\Local\Temp\tmp.exe
2⤵
- Suspicious use of SetWindowsHookEx
PID:4344

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/1976-132-0x0000000000960000-0x0000000000BA2000-memory.dmp

Filesize
2.3MB

Download
memory/1976-133-0x0000000005880000-0x00000000058A2000-memory.dmp

Filesize
136KB

Download
memory/3988-134-0x0000000000000000-mapping.dmp

Download
memory/3988-135-0x0000000004590000-0x00000000045C6000-memory.dmp

Filesize
216KB

Download
memory/3988-136-0x0000000004CE0000-0x0000000005308000-memory.dmp

Filesize
6.2MB

Download
memory/3988-137-0x00000000054B0000-0x0000000005516000-memory.dmp

Filesize
408KB

Download
memory/3988-138-0x0000000005520000-0x0000000005586000-memory.dmp

Filesize
408KB

Download
memory/3988-139-0x0000000005B60000-0x0000000005B7E000-memory.dmp

Filesize
120KB

Download
memory/3988-140-0x00000000071A0000-0x000000000781A000-memory.dmp

Filesize
6.5MB

Download
memory/3988-141-0x0000000006050000-0x000000000606A000-memory.dmp

Filesize
104KB

Download
memory/4344-142-0x0000000000000000-mapping.dmp

Download
memory/4344-143-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4344-144-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4344-145-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4344-146-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4344-147-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download

Analysis

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