remcos | aefc8dd2e95e88d5553864818b68c0ba5426b6ba0234da56d64cbfee030297a0

Analysis

max time kernel
149s
max time network
119s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
30-12-2024 23:16

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General

Target

b766e6f83882eeb863ead8d6da23f8725771efc97b974240eaff856f8365c041.exe
Size

1.3MB
MD5

201ae8144aced76058811bcf23070290
SHA1

f0949cd0a1b002d70385e3ee147df20b64a8542e
SHA256

b766e6f83882eeb863ead8d6da23f8725771efc97b974240eaff856f8365c041
SHA512

8dd789fff082f4e872bf4e592ff4fab749d38cad26f543b9399d39125b8019a1f4fc957d8dc297c88fe7dd1b41eea07cadfe7492a04400c15a82a959a0ee7930
SSDEEP

24576:FyiWFOB4sNYg2yWQCsMMKSfVrgEEAhmeKKYwOIscs+mXjr6:pB4zgWQ+MFfVrg8hmxKNPs7pf

Score

10^/10

remcos grace_2021 discovery persistence rat

Malware Config

Extracted

Family

remcos

Version

3.2.1 Pro

Botnet

Grace_2021

jamaru1444.myftp.biz:2019

Attributes

audio_folder
MicRecords
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
win32.exe
delete_file
false
hide_file
true
hide_keylog_file
true
install_flag
true
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_path
%AppData%
mouse_option
false
mutex
Remcos-NLZOMN
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
win
take_screenshot_option
false
take_screenshot_time
5
take_screenshot_title
wikipedia;solitaire;

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Remcos family
remcos

Executes dropped EXE 2 IoCs

pid	Process
2580	win32.exe
2404	win32.exe

Loads dropped DLL 1 IoCs

pid	Process
2680	cmd.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Windows\CurrentVersion\Run\win = "\"C:\\Users\\Admin\\AppData\\Roaming\\win32.exe\""	b766e6f83882eeb863ead8d6da23f8725771efc97b974240eaff856f8365c041.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Windows\CurrentVersion\Run\win = "\"C:\\Users\\Admin\\AppData\\Roaming\\win32.exe\""	win32.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2324 set thread context of 2236	2324	b766e6f83882eeb863ead8d6da23f8725771efc97b974240eaff856f8365c041.exe	31
PID 2580 set thread context of 2404	2580	win32.exe	37

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 6 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	b766e6f83882eeb863ead8d6da23f8725771efc97b974240eaff856f8365c041.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b766e6f83882eeb863ead8d6da23f8725771efc97b974240eaff856f8365c041.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	win32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	win32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2404	win32.exe

Suspicious use of WriteProcessMemory 38 IoCs

description	pid	Process	procid_target
PID 2324 wrote to memory of 2236	2324	b766e6f83882eeb863ead8d6da23f8725771efc97b974240eaff856f8365c041.exe	31
PID 2324 wrote to memory of 2236	2324	b766e6f83882eeb863ead8d6da23f8725771efc97b974240eaff856f8365c041.exe	31
PID 2324 wrote to memory of 2236	2324	b766e6f83882eeb863ead8d6da23f8725771efc97b974240eaff856f8365c041.exe	31
PID 2324 wrote to memory of 2236	2324	b766e6f83882eeb863ead8d6da23f8725771efc97b974240eaff856f8365c041.exe	31
PID 2324 wrote to memory of 2236	2324	b766e6f83882eeb863ead8d6da23f8725771efc97b974240eaff856f8365c041.exe	31
PID 2324 wrote to memory of 2236	2324	b766e6f83882eeb863ead8d6da23f8725771efc97b974240eaff856f8365c041.exe	31
PID 2324 wrote to memory of 2236	2324	b766e6f83882eeb863ead8d6da23f8725771efc97b974240eaff856f8365c041.exe	31
PID 2324 wrote to memory of 2236	2324	b766e6f83882eeb863ead8d6da23f8725771efc97b974240eaff856f8365c041.exe	31
PID 2324 wrote to memory of 2236	2324	b766e6f83882eeb863ead8d6da23f8725771efc97b974240eaff856f8365c041.exe	31
PID 2324 wrote to memory of 2236	2324	b766e6f83882eeb863ead8d6da23f8725771efc97b974240eaff856f8365c041.exe	31
PID 2324 wrote to memory of 2236	2324	b766e6f83882eeb863ead8d6da23f8725771efc97b974240eaff856f8365c041.exe	31
PID 2324 wrote to memory of 2236	2324	b766e6f83882eeb863ead8d6da23f8725771efc97b974240eaff856f8365c041.exe	31
PID 2324 wrote to memory of 2236	2324	b766e6f83882eeb863ead8d6da23f8725771efc97b974240eaff856f8365c041.exe	31
PID 2236 wrote to memory of 2728	2236	b766e6f83882eeb863ead8d6da23f8725771efc97b974240eaff856f8365c041.exe	32
PID 2236 wrote to memory of 2728	2236	b766e6f83882eeb863ead8d6da23f8725771efc97b974240eaff856f8365c041.exe	32
PID 2236 wrote to memory of 2728	2236	b766e6f83882eeb863ead8d6da23f8725771efc97b974240eaff856f8365c041.exe	32
PID 2236 wrote to memory of 2728	2236	b766e6f83882eeb863ead8d6da23f8725771efc97b974240eaff856f8365c041.exe	32
PID 2728 wrote to memory of 2680	2728	WScript.exe	33
PID 2728 wrote to memory of 2680	2728	WScript.exe	33
PID 2728 wrote to memory of 2680	2728	WScript.exe	33
PID 2728 wrote to memory of 2680	2728	WScript.exe	33
PID 2680 wrote to memory of 2580	2680	cmd.exe	35
PID 2680 wrote to memory of 2580	2680	cmd.exe	35
PID 2680 wrote to memory of 2580	2680	cmd.exe	35
PID 2680 wrote to memory of 2580	2680	cmd.exe	35
PID 2580 wrote to memory of 2404	2580	win32.exe	37
PID 2580 wrote to memory of 2404	2580	win32.exe	37
PID 2580 wrote to memory of 2404	2580	win32.exe	37
PID 2580 wrote to memory of 2404	2580	win32.exe	37
PID 2580 wrote to memory of 2404	2580	win32.exe	37
PID 2580 wrote to memory of 2404	2580	win32.exe	37
PID 2580 wrote to memory of 2404	2580	win32.exe	37
PID 2580 wrote to memory of 2404	2580	win32.exe	37
PID 2580 wrote to memory of 2404	2580	win32.exe	37
PID 2580 wrote to memory of 2404	2580	win32.exe	37
PID 2580 wrote to memory of 2404	2580	win32.exe	37
PID 2580 wrote to memory of 2404	2580	win32.exe	37
PID 2580 wrote to memory of 2404	2580	win32.exe	37

C:\Users\Admin\AppData\Local\Temp\b766e6f83882eeb863ead8d6da23f8725771efc97b974240eaff856f8365c041.exe
"C:\Users\Admin\AppData\Local\Temp\b766e6f83882eeb863ead8d6da23f8725771efc97b974240eaff856f8365c041.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2324
- C:\Users\Admin\AppData\Local\Temp\b766e6f83882eeb863ead8d6da23f8725771efc97b974240eaff856f8365c041.exe
  "C:\Users\Admin\AppData\Local\Temp\b766e6f83882eeb863ead8d6da23f8725771efc97b974240eaff856f8365c041.exe"
  2⤵
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2236
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2728
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\win32.exe"
      4⤵
      Loads dropped DLL
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:2680
    - - C:\Users\Admin\AppData\Roaming\win32.exe
        
        C:\Users\Admin\AppData\Roaming\win32.exe
        5⤵
        Executes dropped EXE
        Suspicious use of SetThreadContext
        System Location Discovery: System Language Discovery
        Suspicious use of WriteProcessMemory
        
        PID:2580
      - C:\Users\Admin\AppData\Roaming\win32.exe
        
        "C:\Users\Admin\AppData\Roaming\win32.exe"
        6⤵
        Executes dropped EXE
        Adds Run key to start application
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        
        PID:2404

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\install.vbs

Filesize
402B

MD5
0023c43bc14320440f81eb67a28e9e99

SHA1
49ac6fcc2550105a92c6ba7a1194e09bafc00ca3

SHA256
5403135310d071b0f43b3b153a3aa636d29d3cf7ccfc2a66550f18e10aa6da21

SHA512
5781f081ca10e112af8402de496c87978f06295620a0331f9226bf6f0637da0aacaf952fe1a3e7d1c9dbcfc0a5a578c22267533b7e5fa4a3ba0b6cc5dc3492bf

Download Submit
C:\Users\Admin\AppData\Roaming\logs.dat

Filesize
148B

MD5
7d0f0f70105dbe0739502edf92732e29

SHA1
fd433a94ca9606e94233782c6fbcb7cb6b6877c0

SHA256
ef6cc2fe39125e76d2df5c2e59a570356eb7e50889343f49e2d56823f7cc0790

SHA512
b1aff6717c8ed6d6a91bd4c37a8c0d4477748546b9630ecbf754a65e92d35e9b4debcc6a4a5a97cc10cf3bc62c341aa192c8af9af0901f6c1ca8b72023f50bf5

Download Submit
C:\Users\Admin\AppData\Roaming\win32.exe

Filesize
1.3MB

MD5
201ae8144aced76058811bcf23070290

SHA1
f0949cd0a1b002d70385e3ee147df20b64a8542e

SHA256
b766e6f83882eeb863ead8d6da23f8725771efc97b974240eaff856f8365c041

SHA512
8dd789fff082f4e872bf4e592ff4fab749d38cad26f543b9399d39125b8019a1f4fc957d8dc297c88fe7dd1b41eea07cadfe7492a04400c15a82a959a0ee7930

Download Submit
memory/2236-15-0x0000000000400000-0x0000000000479000-memory.dmp

Filesize
484KB

Download
memory/2236-19-0x0000000000400000-0x0000000000479000-memory.dmp

Filesize
484KB

Download
memory/2236-8-0x0000000000400000-0x0000000000479000-memory.dmp

Filesize
484KB

Download
memory/2236-10-0x0000000000400000-0x0000000000479000-memory.dmp

Filesize
484KB

Download
memory/2236-30-0x0000000000400000-0x0000000000479000-memory.dmp

Filesize
484KB

Download
memory/2236-11-0x0000000000400000-0x0000000000479000-memory.dmp

Filesize
484KB

Download
memory/2236-34-0x0000000000400000-0x0000000000479000-memory.dmp

Filesize
484KB

Download
memory/2236-13-0x0000000000400000-0x0000000000479000-memory.dmp

Filesize
484KB

Download
memory/2236-26-0x0000000000400000-0x0000000000479000-memory.dmp

Filesize
484KB

Download
memory/2236-25-0x0000000000400000-0x0000000000479000-memory.dmp

Filesize
484KB

Download
memory/2236-21-0x0000000000400000-0x0000000000479000-memory.dmp

Filesize
484KB

Download
memory/2236-17-0x0000000000400000-0x0000000000479000-memory.dmp

Filesize
484KB

Download
memory/2236-22-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2324-33-0x0000000074610000-0x0000000074CFE000-memory.dmp

Filesize
6.9MB

Download
memory/2324-0-0x000000007461E000-0x000000007461F000-memory.dmp

Filesize
4KB

Download
memory/2324-4-0x000000007461E000-0x000000007461F000-memory.dmp

Filesize
4KB

Download
memory/2324-3-0x0000000000470000-0x000000000047A000-memory.dmp

Filesize
40KB

Download
memory/2324-6-0x0000000007D50000-0x0000000007E68000-memory.dmp

Filesize
1.1MB

Download
memory/2324-5-0x0000000074610000-0x0000000074CFE000-memory.dmp

Filesize
6.9MB

Download
memory/2324-2-0x0000000074610000-0x0000000074CFE000-memory.dmp

Filesize
6.9MB

Download
memory/2324-1-0x00000000011B0000-0x000000000130C000-memory.dmp

Filesize
1.4MB

Download
memory/2404-56-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2404-61-0x0000000000400000-0x0000000000479000-memory.dmp

Filesize
484KB

Download
memory/2404-59-0x0000000000400000-0x0000000000479000-memory.dmp

Filesize
484KB

Download
memory/2404-63-0x0000000000400000-0x0000000000479000-memory.dmp

Filesize
484KB

Download
memory/2580-39-0x0000000001210000-0x000000000136C000-memory.dmp

Filesize
1.4MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads