remcos | ed1416c90a49177106cbea5b7551756e06fee46d77fde4879b8735ec56dd54b4

Analysis

max time kernel
149s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
11/01/2025, 05:50

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General

Target

ed1416c90a49177106cbea5b7551756e06fee46d77fde4879b8735ec56dd54b4.exe
Size

448KB
MD5

73666f4d35944f20b34c150b8d9df538
SHA1

8548d775b3475704dfe36e30d3bf115d8964330c
SHA256

ed1416c90a49177106cbea5b7551756e06fee46d77fde4879b8735ec56dd54b4
SHA512

c39ffd67e6418b5fbdc8ae595bc041c3b250e38f7d6ccb132104d592a3fd8cfa7a301dd4531e16ddb48d367977637a8d004dc2712416744ec5cc9e5e24b22433
SSDEEP

12288:yg3o/PnH46JeFGv6m6cCRk6qdg52Kcaj:ytv4HsimURudg53

Score

10^/10

remcos yavakosa discovery persistence rat

Malware Config

Extracted

Family

remcos

Botnet

Yavakosa

198.23.227.212:32583

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
yavascript.exe
copy_folder
xenor
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
true
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-I7G983
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
Remcos family
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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	ed1416c90a49177106cbea5b7551756e06fee46d77fde4879b8735ec56dd54b4.exe

Executes dropped EXE 1 IoCs

pid	Process
4716	yavascript.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-1-5-21-4089630652-1596403869-279772308-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-I7G983 = "\"C:\\Users\\Admin\\AppData\\Roaming\\xenor\\yavascript.exe\""	ed1416c90a49177106cbea5b7551756e06fee46d77fde4879b8735ec56dd54b4.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-I7G983 = "\"C:\\Users\\Admin\\AppData\\Roaming\\xenor\\yavascript.exe\""	yavascript.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 30 IoCs

pid	pid_target	Process	procid_target
1556	3588	WerFault.exe	83
1416	3588	WerFault.exe	83
1852	3588	WerFault.exe	83
3432	3588	WerFault.exe	83
4124	3588	WerFault.exe	83
792	3588	WerFault.exe	83
3444	3588	WerFault.exe	83
2892	4716	WerFault.exe	97
3216	4716	WerFault.exe	97
2108	4716	WerFault.exe	97
936	4716	WerFault.exe	97
4132	4716	WerFault.exe	97
4728	4716	WerFault.exe	97
2976	4716	WerFault.exe	97
3424	4716	WerFault.exe	97
3856	4716	WerFault.exe	97
2796	4716	WerFault.exe	97
232	4716	WerFault.exe	97
3732	4716	WerFault.exe	97
3484	4716	WerFault.exe	97
532	4716	WerFault.exe	97
2016	4716	WerFault.exe	97
2344	4716	WerFault.exe	97
1424	4716	WerFault.exe	97
184	4716	WerFault.exe	97
2852	4716	WerFault.exe	97
576	4716	WerFault.exe	97
2072	4716	WerFault.exe	97
968	4716	WerFault.exe	97
1516	4716	WerFault.exe	97

System Location Discovery: System Language Discovery 1 TTPs 2 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	ed1416c90a49177106cbea5b7551756e06fee46d77fde4879b8735ec56dd54b4.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	yavascript.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3588 wrote to memory of 4716	3588	ed1416c90a49177106cbea5b7551756e06fee46d77fde4879b8735ec56dd54b4.exe	97
PID 3588 wrote to memory of 4716	3588	ed1416c90a49177106cbea5b7551756e06fee46d77fde4879b8735ec56dd54b4.exe	97
PID 3588 wrote to memory of 4716	3588	ed1416c90a49177106cbea5b7551756e06fee46d77fde4879b8735ec56dd54b4.exe	97

C:\Users\Admin\AppData\Local\Temp\ed1416c90a49177106cbea5b7551756e06fee46d77fde4879b8735ec56dd54b4.exe
"C:\Users\Admin\AppData\Local\Temp\ed1416c90a49177106cbea5b7551756e06fee46d77fde4879b8735ec56dd54b4.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3588
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3588 -s 948
  2⤵
  - Program crash
  PID:1556
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3588 -s 952
  2⤵
  - Program crash
  PID:1416
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3588 -s 1108
  2⤵
  - Program crash
  PID:1852
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3588 -s 952
  2⤵
  - Program crash
  PID:3432
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3588 -s 1140
  2⤵
  - Program crash
  PID:4124
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3588 -s 932
  2⤵
  - Program crash
  PID:792
- C:\Users\Admin\AppData\Roaming\xenor\yavascript.exe
  "C:\Users\Admin\AppData\Roaming\xenor\yavascript.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  PID:4716
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4716 -s 372
    3⤵
    - Program crash
    PID:2892
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4716 -s 680
    3⤵
    - Program crash
    PID:3216
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4716 -s 720
    3⤵
    - Program crash
    PID:2108
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4716 -s 756
    3⤵
    - Program crash
    PID:936
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4716 -s 728
    3⤵
    - Program crash
    PID:4132
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4716 -s 928
    3⤵
    - Program crash
    PID:4728
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4716 -s 968
    3⤵
    - Program crash
    PID:2976
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4716 -s 984
    3⤵
    - Program crash
    PID:3424
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4716 -s 992
    3⤵
    - Program crash
    PID:3856
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4716 -s 1064
    3⤵
    - Program crash
    PID:2796
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4716 -s 1292
    3⤵
    - Program crash
    PID:232
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4716 -s 736
    3⤵
    - Program crash
    PID:3732
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4716 -s 864
    3⤵
    - Program crash
    PID:3484
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4716 -s 1392
    3⤵
    - Program crash
    PID:532
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4716 -s 716
    3⤵
    - Program crash
    PID:2016
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4716 -s 1396
    3⤵
    - Program crash
    PID:2344
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4716 -s 864
    3⤵
    - Program crash
    PID:1424
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4716 -s 1404
    3⤵
    - Program crash
    PID:184
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4716 -s 1412
    3⤵
    - Program crash
    PID:2852
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4716 -s 1436
    3⤵
    - Program crash
    PID:576
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4716 -s 924
    3⤵
    - Program crash
    PID:2072
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4716 -s 932
    3⤵
    - Program crash
    PID:968
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4716 -s 1276
    3⤵
    - Program crash
    PID:1516
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3588 -s 960
  2⤵
  - Program crash
  PID:3444

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 3588 -ip 3588
1⤵
PID:1144

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 504 -p 3588 -ip 3588
1⤵
PID:4812

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 3588 -ip 3588
1⤵
PID:3888

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 548 -p 3588 -ip 3588
1⤵
PID:2916

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 508 -p 3588 -ip 3588
1⤵
PID:4368

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 3588 -ip 3588
1⤵
PID:1584

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 3588 -ip 3588
1⤵
PID:4424

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 4716 -ip 4716
1⤵
PID:1840

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 504 -p 4716 -ip 4716
1⤵
PID:2784

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 4716 -ip 4716
1⤵
PID:4688

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 4716 -ip 4716
1⤵
PID:4444

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 4716 -ip 4716
1⤵
PID:4528

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 4716 -ip 4716
1⤵
PID:2856

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 504 -p 4716 -ip 4716
1⤵
PID:1220

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 4716 -ip 4716
1⤵
PID:4916

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 360 -p 4716 -ip 4716
1⤵
PID:1692

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 360 -p 4716 -ip 4716
1⤵
PID:3680

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 4716 -ip 4716
1⤵
PID:1264

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 4716 -ip 4716
1⤵
PID:2400

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 4716 -ip 4716
1⤵
PID:3356

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 4716 -ip 4716
1⤵
PID:648

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 4716 -ip 4716
1⤵
PID:3384

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 4716 -ip 4716
1⤵
PID:1780

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 4716 -ip 4716
1⤵
PID:2020

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 4716 -ip 4716
1⤵
PID:3480

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 504 -p 4716 -ip 4716
1⤵
PID:2856

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 360 -p 4716 -ip 4716
1⤵
PID:1220

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 508 -p 4716 -ip 4716
1⤵
PID:1476

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 4716 -ip 4716
1⤵
PID:1096

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 4716 -ip 4716
1⤵
PID:3496

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

Query Registry

T1012

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\Roaming\xenor\yavascript.exe

Filesize
448KB

MD5
73666f4d35944f20b34c150b8d9df538

SHA1
8548d775b3475704dfe36e30d3bf115d8964330c

SHA256
ed1416c90a49177106cbea5b7551756e06fee46d77fde4879b8735ec56dd54b4

SHA512
c39ffd67e6418b5fbdc8ae595bc041c3b250e38f7d6ccb132104d592a3fd8cfa7a301dd4531e16ddb48d367977637a8d004dc2712416744ec5cc9e5e24b22433

Download Submit
memory/3588-1-0x0000000000900000-0x0000000000A00000-memory.dmp

Filesize
1024KB

Download
memory/3588-2-0x00000000024F0000-0x000000000256A000-memory.dmp

Filesize
488KB

Download
memory/3588-3-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3588-17-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3588-16-0x00000000024F0000-0x000000000256A000-memory.dmp

Filesize
488KB

Download
memory/3588-15-0x0000000000400000-0x0000000000847000-memory.dmp

Filesize
4.3MB

Download
memory/4716-25-0x0000000000400000-0x0000000000847000-memory.dmp

Filesize
4.3MB

Download
memory/4716-29-0x0000000000400000-0x0000000000847000-memory.dmp

Filesize
4.3MB

Download
memory/4716-22-0x0000000000400000-0x0000000000847000-memory.dmp

Filesize
4.3MB

Download
memory/4716-24-0x0000000000400000-0x0000000000847000-memory.dmp

Filesize
4.3MB

Download
memory/4716-23-0x0000000000400000-0x0000000000847000-memory.dmp

Filesize
4.3MB

Download
memory/4716-19-0x0000000000400000-0x0000000000847000-memory.dmp

Filesize
4.3MB

Download
memory/4716-26-0x0000000000400000-0x0000000000847000-memory.dmp

Filesize
4.3MB

Download
memory/4716-27-0x0000000000400000-0x0000000000847000-memory.dmp

Filesize
4.3MB

Download
memory/4716-28-0x0000000000400000-0x0000000000847000-memory.dmp

Filesize
4.3MB

Download
memory/4716-20-0x0000000000400000-0x0000000000847000-memory.dmp

Filesize
4.3MB

Download
memory/4716-30-0x0000000000400000-0x0000000000847000-memory.dmp

Filesize
4.3MB

Download
memory/4716-31-0x0000000000400000-0x0000000000847000-memory.dmp

Filesize
4.3MB

Download
memory/4716-32-0x0000000000400000-0x0000000000847000-memory.dmp

Filesize
4.3MB

Download
memory/4716-33-0x0000000000400000-0x0000000000847000-memory.dmp

Filesize
4.3MB

Download
memory/4716-34-0x0000000000400000-0x0000000000847000-memory.dmp

Filesize
4.3MB

Download
memory/4716-35-0x0000000000400000-0x0000000000847000-memory.dmp

Filesize
4.3MB

Download
memory/4716-36-0x0000000000400000-0x0000000000847000-memory.dmp

Filesize
4.3MB

Download
memory/4716-37-0x0000000000400000-0x0000000000847000-memory.dmp

Filesize
4.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads