remcos | 4b42ed6bfed1bd64fbcc07e4ef108ae715802d54f2d7b1268aeab39d8a2966e8

General

Target

z000023947538734 FAC-ELECTRONICAPDF.exe
Size

7.5MB
MD5

d5a3c4222b087ecabf47ffa4b4b05ec1
SHA1

32aa6710e55e113c578904884ce9dafc47d907d8
SHA256

4b42ed6bfed1bd64fbcc07e4ef108ae715802d54f2d7b1268aeab39d8a2966e8
SHA512

c278b8c64238d3d313c2d76506c545981a891404a20595679c35f4e10f7de3eaf028967ea1b9ab0c64c7bd48f2a8b90cd070e7c51a142de7d7d37bd216742d45
SSDEEP

98304:z5djeXAhCy1HDJQv8kVH0WUjqqTnYRoeEgmn1NX+6fnUXSvPLOqq21R2ajvLjgdR:z5djUAhCy1dUVx3vinLVdXMakf

Score

10^/10

remcos 20???septiem��2024 discovery persistence rat

Malware Config

Extracted

Family

remcos

Botnet

20???Septiem��2024

C2

ufye28738bd3yv23d783.con-ip.com:5023

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-WM7NR4
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

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-355097885-2402257403-2971294179-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Express = "C:\\Users\\Admin\\Pictures\\MonaLisa\\HunterExpress.exe"	z000023947538734 FAC-ELECTRONICAPDF.exe

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	z000023947538734 FAC-ELECTRONICAPDF.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	z000023947538734 FAC-ELECTRONICAPDF.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1100	z000023947538734 FAC-ELECTRONICAPDF.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1100	z000023947538734 FAC-ELECTRONICAPDF.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3600 wrote to memory of 1100	3600	z000023947538734 FAC-ELECTRONICAPDF.exe	89
PID 3600 wrote to memory of 1100	3600	z000023947538734 FAC-ELECTRONICAPDF.exe	89
PID 3600 wrote to memory of 1100	3600	z000023947538734 FAC-ELECTRONICAPDF.exe	89
PID 3600 wrote to memory of 1100	3600	z000023947538734 FAC-ELECTRONICAPDF.exe	89
PID 3600 wrote to memory of 1100	3600	z000023947538734 FAC-ELECTRONICAPDF.exe	89

C:\Users\Admin\AppData\Local\Temp\z000023947538734 FAC-ELECTRONICAPDF.exe
"C:\Users\Admin\AppData\Local\Temp\z000023947538734 FAC-ELECTRONICAPDF.exe"
1⤵
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3600
- C:\Users\Admin\AppData\Local\Temp\z000023947538734 FAC-ELECTRONICAPDF.exe
  "C:\Users\Admin\AppData\Local\Temp\z000023947538734 FAC-ELECTRONICAPDF.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of SetWindowsHookEx
  PID:1100

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
89ebf115ac9d91ab2eb6320733d34dbe

SHA1
d9b0692a940acd4b642257e86ce9e450e3caca94

SHA256
1e4bfb61a3eec2375cab49d8a1c302d27baaa34af298b55eb32e15c5253c8e73

SHA512
484b88c846accc69cf52decd016ffc62081f39fd10b9abf5904d44027152bc0534b15feb1efd1b6957eba771d4986d7498324619533a78a1b0f7afe709550282

Download Submit
C:\ProgramData\remcos\logs.dat

Filesize
156B

MD5
9c59b02200627fa3cd4b7c5d39ce58ac

SHA1
91c622bf00a9be78c373c00ad51e7d68f7bba0d6

SHA256
157fd9c25e5b78c86202b2c2fb05c0ee84e76bf085733e8c7d30fd74a5efe327

SHA512
8535aa488a8d6cb6b957d2dfe1dbadb27be100723e0bb9c38881bb4cb4e65dda2c909fec8b4ba313ce96979c5d612774d87dfaeaf1d030cdb32eee854f8a0d4d

Download Submit
memory/1100-16-0x0000000000D90000-0x0000000000E12000-memory.dmp

Filesize
520KB

Download
memory/1100-25-0x0000000000D90000-0x0000000000E12000-memory.dmp

Filesize
520KB

Download
memory/1100-43-0x0000000000D90000-0x0000000000E12000-memory.dmp

Filesize
520KB

Download
memory/1100-10-0x0000000000D90000-0x0000000000E12000-memory.dmp

Filesize
520KB

Download
memory/1100-11-0x0000000000D90000-0x0000000000E12000-memory.dmp

Filesize
520KB

Download
memory/1100-6-0x0000000000D90000-0x0000000000E12000-memory.dmp

Filesize
520KB

Download
memory/1100-12-0x0000000000D90000-0x0000000000E12000-memory.dmp

Filesize
520KB

Download
memory/1100-19-0x0000000000D90000-0x0000000000E12000-memory.dmp

Filesize
520KB

Download
memory/1100-17-0x0000000000400000-0x0000000000D8C000-memory.dmp

Filesize
9.5MB

Download
memory/1100-42-0x0000000000D90000-0x0000000000E12000-memory.dmp

Filesize
520KB

Download
memory/1100-33-0x0000000000D90000-0x0000000000E12000-memory.dmp

Filesize
520KB

Download
memory/1100-26-0x0000000000D90000-0x0000000000E12000-memory.dmp

Filesize
520KB

Download
memory/1100-15-0x0000000000D90000-0x0000000000E12000-memory.dmp

Filesize
520KB

Download
memory/1100-18-0x0000000000D90000-0x0000000000E12000-memory.dmp

Filesize
520KB

Download
memory/1100-20-0x0000000000D90000-0x0000000000E12000-memory.dmp

Filesize
520KB

Download
memory/3600-23-0x0000000000457000-0x0000000000470000-memory.dmp

Filesize
100KB

Download
memory/3600-1-0x0000000000457000-0x0000000000470000-memory.dmp

Filesize
100KB

Download
memory/3600-5-0x0000000000400000-0x0000000000D8C000-memory.dmp

Filesize
9.5MB

Download
memory/3600-4-0x0000000000400000-0x0000000000D8C000-memory.dmp

Filesize
9.5MB

Download
memory/3600-8-0x0000000000400000-0x0000000000D8C000-memory.dmp

Filesize
9.5MB

Download
memory/3600-0-0x0000000000400000-0x0000000000D8C000-memory.dmp

Filesize
9.5MB

Download
memory/3600-9-0x0000000000400000-0x0000000000D8C000-memory.dmp

Filesize
9.5MB

Download
memory/3600-3-0x0000000000400000-0x0000000000D8C000-memory.dmp

Filesize
9.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads