remcos | f21a4babef71b5a6e686d59ce063703582c891ac7eca80add3624ce62d82ba4a

General

Target

PAYMENT COPY.js
Size

4KB
MD5

c8aa969d7b3ce381561a1809ddfea06e
SHA1

bb0975b82214658c963413587e38ca1fdbea8c9c
SHA256

ca21396df7eba831ea17c98d2fdd4321a8b529bb1a103f9f5f0249f3f69d7494
SHA512

2fa60b56ebacdd0bdcf3116dbeac968dca52140e4d2605eb0ccdb5f35aae1298394452a341d56afa5afb1652704aefaac29049dca75f111d567c831a5f1ac053
SSDEEP

96:KIYh3+AD6+IqaOiL5zCHdDjcmAPF1+h6kbWgn7towcGtoK4DZfI9SjXpfRhUnjE7:VCITOiLsdmtw0Mn7GwcGtoK49fI9SDNN

Score

10^/10

remcos remotehost rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

51.75.209.245:2404

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-CMFPLR
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

Blocklisted process makes network request 2 IoCs

flow	pid	Process
5	2972	wscript.exe
11	2972	wscript.exe

Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
3040	NMXCJKHKDFDF.exe

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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	wscript.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Sysgsdgdssgtem.exe	Powershell.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Sysgsdgdssgtem.exe	Powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3040 set thread context of 4468	3040	NMXCJKHKDFDF.exe	93

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

pid	Process
176	Powershell.exe
176	Powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3040	NMXCJKHKDFDF.exe
Token: SeDebugPrivilege	176	Powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4468	RegSvcs.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2972 wrote to memory of 3040	2972	wscript.exe	84
PID 2972 wrote to memory of 3040	2972	wscript.exe	84
PID 2972 wrote to memory of 3040	2972	wscript.exe	84
PID 3040 wrote to memory of 176	3040	NMXCJKHKDFDF.exe	91
PID 3040 wrote to memory of 176	3040	NMXCJKHKDFDF.exe	91
PID 3040 wrote to memory of 176	3040	NMXCJKHKDFDF.exe	91
PID 3040 wrote to memory of 4468	3040	NMXCJKHKDFDF.exe	93
PID 3040 wrote to memory of 4468	3040	NMXCJKHKDFDF.exe	93
PID 3040 wrote to memory of 4468	3040	NMXCJKHKDFDF.exe	93
PID 3040 wrote to memory of 4468	3040	NMXCJKHKDFDF.exe	93
PID 3040 wrote to memory of 4468	3040	NMXCJKHKDFDF.exe	93
PID 3040 wrote to memory of 4468	3040	NMXCJKHKDFDF.exe	93
PID 3040 wrote to memory of 4468	3040	NMXCJKHKDFDF.exe	93
PID 3040 wrote to memory of 4468	3040	NMXCJKHKDFDF.exe	93
PID 3040 wrote to memory of 4468	3040	NMXCJKHKDFDF.exe	93
PID 3040 wrote to memory of 4468	3040	NMXCJKHKDFDF.exe	93
PID 3040 wrote to memory of 4468	3040	NMXCJKHKDFDF.exe	93
PID 3040 wrote to memory of 4468	3040	NMXCJKHKDFDF.exe	93

C:\Windows\system32\wscript.exe
wscript.exe "C:\Users\Admin\AppData\Local\Temp\PAYMENT COPY.js"
1⤵
- Blocklisted process makes network request
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2972
- C:\Users\Admin\AppData\Local\Temp\NMXCJKHKDFDF.exe
  "C:\Users\Admin\AppData\Local\Temp\NMXCJKHKDFDF.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3040
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe
    "Powershell" Copy-Item 'C:\Users\Admin\AppData\Local\Temp\NMXCJKHKDFDF.exe' 'C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Sysgsdgdssgtem.exe'
    3⤵
    - Drops startup file
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:176
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
    3⤵
    - Suspicious use of SetWindowsHookEx
    PID:4468

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\NMXCJKHKDFDF.exe

Filesize
616KB

MD5
12eb96cc98bb2088519e0e38316e8c8f

SHA1
58449464843683d970264fe57f8dc13886e02449

SHA256
8f6954e1834b49a24b8e937ff093f1e534f89691ce805ce2f14553315a18e651

SHA512
9c7de33049a5d6da7d99d5e78d44d9b1fd15e0c79359a8e5e3e468f565bbc4bfa6054f79a810506b72f033e97dd80dbf1871e3b122c8950f621496c40866f501

Download Submit
C:\Users\Admin\AppData\Local\Temp\NMXCJKHKDFDF.exe

Filesize
616KB

MD5
12eb96cc98bb2088519e0e38316e8c8f

SHA1
58449464843683d970264fe57f8dc13886e02449

SHA256
8f6954e1834b49a24b8e937ff093f1e534f89691ce805ce2f14553315a18e651

SHA512
9c7de33049a5d6da7d99d5e78d44d9b1fd15e0c79359a8e5e3e468f565bbc4bfa6054f79a810506b72f033e97dd80dbf1871e3b122c8950f621496c40866f501

Download Submit
memory/176-145-0x0000000005060000-0x0000000005082000-memory.dmp

Filesize
136KB

Download
memory/176-152-0x0000000006670000-0x0000000006692000-memory.dmp

Filesize
136KB

Download
memory/176-151-0x00000000065F0000-0x000000000660A000-memory.dmp

Filesize
104KB

Download
memory/176-150-0x0000000007190000-0x0000000007226000-memory.dmp

Filesize
600KB

Download
memory/176-139-0x0000000004BA0000-0x0000000004BD6000-memory.dmp

Filesize
216KB

Download
memory/176-148-0x0000000006120000-0x000000000613E000-memory.dmp

Filesize
120KB

Download
memory/176-142-0x0000000005210000-0x0000000005838000-memory.dmp

Filesize
6.2MB

Download
memory/176-147-0x0000000005AA0000-0x0000000005B06000-memory.dmp

Filesize
408KB

Download
memory/176-146-0x0000000005A30000-0x0000000005A96000-memory.dmp

Filesize
408KB

Download
memory/3040-137-0x00000000052D0000-0x000000000536C000-memory.dmp

Filesize
624KB

Download
memory/3040-136-0x0000000005970000-0x0000000005F14000-memory.dmp

Filesize
5.6MB

Download
memory/3040-135-0x0000000000890000-0x0000000000930000-memory.dmp

Filesize
640KB

Download
memory/4468-144-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4468-143-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4468-141-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4468-149-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4468-153-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download

Analysis

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