remcos | bca0f84530687df0192d79ce7bc1f1359c5ffccbbba864006d525697a964bfca

Analysis

max time kernel
150s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
19/05/2024, 18:10

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
5ab7ab87a1164876f8515a82ec11a51d_JaffaCakes118.exe
Size 299KB
Sample240519-wr9blaah8x
SHA256 bca0f84530687df0192d79ce7bc1f1359c5ffccbbba864006d525697a964bfca
MD5 5ab7ab87a1164876f8515a82ec11a51d
SHA1 4268a9c421a1c37695acc67435334269ac8622ec
SHA512 686348f82ecac03181776e153c9f8b6219ce3e5e057f1e6ba42182e0fa075832f5284a36a05d5e90a96dfef7fd8b6f7b905d69ce97d68a6e8553fbb2bc55a8b8
SSDEEP 6144:yYyF0obZta3EvmYd86ouD8XDoqHBnnvlvHZIjRFq0WLaL:y5F0ofoe86ow8XDo2BnnvpHY8a
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos remcos20 persistence rat

Malware Config

Extracted

Family

remcos

Version

2.0.0 Pro

Botnet

REMCOS20

casillas.hicam.net:2404
casillasmx.chickenkiller.com:2404
casillas45.hopto.org:2404
casillas.libfoobar.so:2404
du4alr0ute.sendsmtp.com:2404
settings.wifizone.org:2404

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
remcos.exe
copy_folder
REM20
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
jwthoir
keylog_path
%AppData%
mouse_option
false
mutex
REM20-HT0OGO
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
1
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 2 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-1-5-21-711569230-3659488422-571408806-1000\Control Panel\International\Geo\Nation	5ab7ab87a1164876f8515a82ec11a51d_JaffaCakes118.exe
Key value queried	\REGISTRY\USER\S-1-5-21-711569230-3659488422-571408806-1000\Control Panel\International\Geo\Nation	appert8u5e5e7yhg45e.exe

Executes dropped EXE 3 IoCs

pid	Process
336	appert8u5e5e7yhg45e.exe
4512	appert8u5e5e7yhg45e.exe
3008	appert8u5e5e7yhg45e.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-711569230-3659488422-571408806-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Applicationtinjtbertsnrimrjtbrdyth = "C:\\Users\\Admin\\AppData\\Roaming\\appert8u5e5e7yhg45e.exe -boot"	appert8u5e5e7yhg45e.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 336 set thread context of 3008	336	appert8u5e5e7yhg45e.exe	111

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\security.config.cch.new	5ab7ab87a1164876f8515a82ec11a51d_JaffaCakes118.exe
File created	C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\enterprisesec.config.cch.new	5ab7ab87a1164876f8515a82ec11a51d_JaffaCakes118.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2720	5ab7ab87a1164876f8515a82ec11a51d_JaffaCakes118.exe
336	appert8u5e5e7yhg45e.exe
4512	appert8u5e5e7yhg45e.exe
336	appert8u5e5e7yhg45e.exe
336	appert8u5e5e7yhg45e.exe
336	appert8u5e5e7yhg45e.exe
336	appert8u5e5e7yhg45e.exe
336	appert8u5e5e7yhg45e.exe
336	appert8u5e5e7yhg45e.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2720	5ab7ab87a1164876f8515a82ec11a51d_JaffaCakes118.exe
Token: SeDebugPrivilege	336	appert8u5e5e7yhg45e.exe
Token: SeDebugPrivilege	4512	appert8u5e5e7yhg45e.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3008	appert8u5e5e7yhg45e.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2720 wrote to memory of 2988	2720	5ab7ab87a1164876f8515a82ec11a51d_JaffaCakes118.exe	99
PID 2720 wrote to memory of 2988	2720	5ab7ab87a1164876f8515a82ec11a51d_JaffaCakes118.exe	99
PID 2720 wrote to memory of 2988	2720	5ab7ab87a1164876f8515a82ec11a51d_JaffaCakes118.exe	99
PID 4632 wrote to memory of 336	4632	explorer.exe	101
PID 4632 wrote to memory of 336	4632	explorer.exe	101
PID 4632 wrote to memory of 336	4632	explorer.exe	101
PID 336 wrote to memory of 4512	336	appert8u5e5e7yhg45e.exe	104
PID 336 wrote to memory of 4512	336	appert8u5e5e7yhg45e.exe	104
PID 336 wrote to memory of 4512	336	appert8u5e5e7yhg45e.exe	104
PID 336 wrote to memory of 3008	336	appert8u5e5e7yhg45e.exe	111
PID 336 wrote to memory of 3008	336	appert8u5e5e7yhg45e.exe	111
PID 336 wrote to memory of 3008	336	appert8u5e5e7yhg45e.exe	111
PID 336 wrote to memory of 3008	336	appert8u5e5e7yhg45e.exe	111
PID 336 wrote to memory of 3008	336	appert8u5e5e7yhg45e.exe	111
PID 336 wrote to memory of 3008	336	appert8u5e5e7yhg45e.exe	111
PID 336 wrote to memory of 3008	336	appert8u5e5e7yhg45e.exe	111
PID 336 wrote to memory of 3008	336	appert8u5e5e7yhg45e.exe	111
PID 336 wrote to memory of 3008	336	appert8u5e5e7yhg45e.exe	111

C:\Users\Admin\AppData\Local\Temp\5ab7ab87a1164876f8515a82ec11a51d_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\5ab7ab87a1164876f8515a82ec11a51d_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2720
- C:\Windows\SysWOW64\explorer.exe
  "C:\Windows\System32\explorer.exe" /c select, C:\Users\Admin\AppData\Roaming\appert8u5e5e7yhg45e.exe
  2⤵
  PID:2988

C:\Windows\explorer.exe
C:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding
1⤵
- Suspicious use of WriteProcessMemory
PID:4632
- C:\Users\Admin\AppData\Roaming\appert8u5e5e7yhg45e.exe
  "C:\Users\Admin\AppData\Roaming\appert8u5e5e7yhg45e.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:336
- - C:\Users\Admin\AppData\Roaming\appert8u5e5e7yhg45e.exe
    "C:\Users\Admin\AppData\Roaming\appert8u5e5e7yhg45e.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4512
- - C:\Users\Admin\AppData\Roaming\appert8u5e5e7yhg45e.exe
    "C:\Users\Admin\AppData\Roaming\appert8u5e5e7yhg45e.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetWindowsHookEx
    PID:3008

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

appert8u5e5e7yhg45e.exe

Path C:\Users\Admin\AppData\Roaming\appert8u5e5e7yhg45e.exe
Size 299KB
SHA256 bca0f84530687df0192d79ce7bc1f1359c5ffccbbba864006d525697a964bfca
MD5 5ab7ab87a1164876f8515a82ec11a51d
SHA1 4268a9c421a1c37695acc67435334269ac8622ec
SHA512 686348f82ecac03181776e153c9f8b6219ce3e5e057f1e6ba42182e0fa075832f5284a36a05d5e90a96dfef7fd8b6f7b905d69ce97d68a6e8553fbb2bc55a8b8
SSDEEP 6144:yYyF0obZta3EvmYd86ouD8XDoqHBnnvlvHZIjRFq0WLaL:y5F0ofoe86ow8XDo2BnnvpHY8a
MD5 SHA1 SHA512 SSDEEP

Submit Download

enterprisesec.config.cch

Path C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\enterprisesec.config.cch
Size 478B
SHA256 5df0a1c86b2edefe26537322eea9a8807d0468fa54464c2eba1f3c10fab5919e
MD5 459aaa4ef6cb96ca6c2d826a2ee7517f
SHA1 b371e0e5d621816f87f1b027813289e45085681d
SHA512 b31ccdfb6ef8299abfbfddb8f20450f08ef1187e9f138845df2f619325f436fa30152b3e96e3bef6b47ed6fa9595bec7584e96cf8b1708038f0027bbd0179b27
MD5 SHA1 SHA512

Submit Download

memory/2720-12-0x0000000074E40000-0x00000000753F1000-memory.dmp

Download

memory/2720-3-0x0000000074E40000-0x00000000753F1000-memory.dmp

Download

memory/2720-4-0x0000000074E40000-0x00000000753F1000-memory.dmp

Download

memory/2720-5-0x0000000074E42000-0x0000000074E43000-memory.dmp

Download

memory/2720-0-0x0000000074E42000-0x0000000074E43000-memory.dmp

Download

memory/2720-2-0x0000000074E40000-0x00000000753F1000-memory.dmp

Download

memory/2720-1-0x0000000074E40000-0x00000000753F1000-memory.dmp

Download

memory/3008-18-0x0000000000400000-0x000000000041C000-memory.dmp

Download

memory/3008-23-0x0000000000400000-0x000000000041C000-memory.dmp

Download

memory/3008-22-0x0000000000400000-0x000000000041C000-memory.dmp

Download

memory/3008-20-0x0000000000400000-0x000000000041C000-memory.dmp

Download