remcos | 643f9422296cd5930a4e82dbaca18973f7819740377878ee40dc12db89f45edf

Resubmissions

19-04-2024 17:50

240419-wel1jabb47 10

19-04-2024 17:46

240419-wcgb9sbh2y 10

Analysis

max time kernel
26s
max time network
30s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
19-04-2024 17:46

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General

Target

g2m.dll
Size

6.6MB
MD5

267eb3b01b4f63299425f5a7a9516e80
SHA1

f8788fc20b9487042006c7af99849652bfe0dac9
SHA256

3dee4573911345d6b845257b391a90861bb3c345e2f5b445cdd5edbffb58b75a
SHA512

d505e240d7b831a453c802b855235cc37d64cd0f64c0ca19a673a85c23cdf749963f8bfbeb0d4f745419fbfcb23725704f4c1034b7c9a15cc07537499b2a7e4e
SSDEEP

98304:qqHQXidDnBW0hcthSDnqDO5rzRQfaxcxVwdqaBAN:qXi9gDmyhmMN

Score

10^/10

remcos remotehost persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

martinsplexis.duckdns.org:4047

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-RH6SHP
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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

reg.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1687926120-3022217735-1146543763-1000\Software\Microsoft\Windows\CurrentVersion\Run\*Chrome = "rundll32.exe C:\\Users\\Admin\\AppData\\Roaming\\HEARTB.dll,EntryPoint"	reg.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

Processes:

regsvr32.exe

pid process

4280 regsvr32.exe

pid	process
4280	regsvr32.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

regsvr32.exeregsvr32.execmd.exe

description	pid	process	target process
PID 4192 wrote to memory of 4280	4192	regsvr32.exe	regsvr32.exe
PID 4192 wrote to memory of 4280	4192	regsvr32.exe	regsvr32.exe
PID 4192 wrote to memory of 4280	4192	regsvr32.exe	regsvr32.exe
PID 4280 wrote to memory of 2680	4280	regsvr32.exe	regsvr32.exe
PID 4280 wrote to memory of 2680	4280	regsvr32.exe	regsvr32.exe
PID 4280 wrote to memory of 2680	4280	regsvr32.exe	regsvr32.exe
PID 4280 wrote to memory of 2680	4280	regsvr32.exe	regsvr32.exe
PID 4280 wrote to memory of 2680	4280	regsvr32.exe	regsvr32.exe
PID 4280 wrote to memory of 2680	4280	regsvr32.exe	regsvr32.exe
PID 4280 wrote to memory of 3612	4280	regsvr32.exe	cmd.exe
PID 4280 wrote to memory of 3612	4280	regsvr32.exe	cmd.exe
PID 4280 wrote to memory of 3612	4280	regsvr32.exe	cmd.exe
PID 3612 wrote to memory of 3620	3612	cmd.exe	reg.exe
PID 3612 wrote to memory of 3620	3612	cmd.exe	reg.exe
PID 3612 wrote to memory of 3620	3612	cmd.exe	reg.exe

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\g2m.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:4192

C:\Windows\SysWOW64\regsvr32.exe
/s C:\Users\Admin\AppData\Local\Temp\g2m.dll
2⤵
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of WriteProcessMemory
PID:4280

C:\Windows\SysWOW64\regsvr32.exe
"C:\Windows\SysWOW64\regsvr32.exe"
3⤵
PID:2680

C:\Windows\SysWOW64\cmd.exe
cmd.exe /C reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*Chrome" /t REG_SZ /d "rundll32.exe C:\Users\Admin\AppData\Roaming\HEARTB.dll",EntryPoint /f & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:3612

C:\Windows\SysWOW64\reg.exe
reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*Chrome" /t REG_SZ /d "rundll32.exe C:\Users\Admin\AppData\Roaming\HEARTB.dll",EntryPoint /f
4⤵
- Adds Run key to start application
PID:3620

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

memory/2680-13-0x0000000002370000-0x00000000023F2000-memory.dmp

Filesize
520KB

Download
memory/2680-14-0x0000000002370000-0x00000000023F2000-memory.dmp

Filesize
520KB

Download
memory/2680-20-0x0000000002370000-0x00000000023F2000-memory.dmp

Filesize
520KB

Download
memory/2680-19-0x0000000002370000-0x00000000023F2000-memory.dmp

Filesize
520KB

Download
memory/2680-16-0x0000000002370000-0x00000000023F2000-memory.dmp

Filesize
520KB

Download
memory/2680-8-0x0000000002370000-0x00000000023F2000-memory.dmp

Filesize
520KB

Download
memory/2680-1-0x0000000002600000-0x0000000002601000-memory.dmp

Filesize
4KB

Download
memory/2680-12-0x0000000002370000-0x00000000023F2000-memory.dmp

Filesize
520KB

Download
memory/2680-9-0x0000000002370000-0x00000000023F2000-memory.dmp

Filesize
520KB

Download
memory/2680-15-0x0000000002370000-0x00000000023F2000-memory.dmp

Filesize
520KB

Download
memory/2680-11-0x0000000002370000-0x00000000023F2000-memory.dmp

Filesize
520KB

Download
memory/4280-0-0x00000000679E0000-0x0000000068086000-memory.dmp

Filesize
6.6MB

Download
memory/4280-5-0x00000000679E0000-0x0000000068086000-memory.dmp

Filesize
6.6MB

Download
memory/4280-4-0x00000000679E0000-0x0000000068086000-memory.dmp

Filesize
6.6MB

Download
memory/4280-2-0x00000000679E0000-0x0000000068086000-memory.dmp

Filesize
6.6MB

Download