remcos | f296a419a0bd4198e698621ce4f8c09384bf9cfbb82ff337fafecbfaa0b5313f

General

Target

4026ddd4aa8ec497c63fdffdd444e526_JaffaCakes118.exe
Size

131KB
MD5

4026ddd4aa8ec497c63fdffdd444e526
SHA1

724178df6f04c3f21305e23a30a0f3116d6946ea
SHA256

f296a419a0bd4198e698621ce4f8c09384bf9cfbb82ff337fafecbfaa0b5313f
SHA512

1aa3f1cc77907b943926e3944542fe9221876f1f6633b087fc7d5d3221ffd15a85f0863b7101f3453e2157143e2c9b92bfc558653afddd5075e3320c6bebdc89
SSDEEP

1536:ITHiPBX4nDzMyRXGHrc9YRHqbTypgpmb5Q+ZReSdhk/J+YLgD3mrxb53cSuYQjKm:xPd4n/M+WLcilrpgGH/GwY87mVmIXW

Score

10^/10

remcos host discovery persistence rat

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

C2

systemcontrol.ddns.net:45000

systemcontrol2.ddns.net:45000

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
OfficeUpgrade.exe
copy_folder
OfficeUpgrade
delete_file
false
hide_file
true
hide_keylog_file
true
install_flag
false
install_path
%AppData%
keylog_crypt
true
keylog_file
Upgrader.dat
keylog_flag
false
keylog_folder
Upgrader
keylog_path
%AppData%
mouse_option
false
mutex
req_khauflaoyr
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screens
screenshot_path
%AppData%
screenshot_time
1
startup_value
OfficeUpgrade
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 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	4026ddd4aa8ec497c63fdffdd444e526_JaffaCakes118.exe

Executes dropped EXE 2 IoCs

pid	Process
3544	wn2ra4ohzdr.exe
4840	wn2ra4ohzdr.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-1-5-21-4089630652-1596403869-279772308-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	4026ddd4aa8ec497c63fdffdd444e526_JaffaCakes118.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3544 set thread context of 4840	3544	wn2ra4ohzdr.exe	87

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 3 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	4026ddd4aa8ec497c63fdffdd444e526_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wn2ra4ohzdr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wn2ra4ohzdr.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4840	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4652 wrote to memory of 3544	4652	4026ddd4aa8ec497c63fdffdd444e526_JaffaCakes118.exe	86
PID 4652 wrote to memory of 3544	4652	4026ddd4aa8ec497c63fdffdd444e526_JaffaCakes118.exe	86
PID 4652 wrote to memory of 3544	4652	4026ddd4aa8ec497c63fdffdd444e526_JaffaCakes118.exe	86
PID 3544 wrote to memory of 4840	3544	wn2ra4ohzdr.exe	87
PID 3544 wrote to memory of 4840	3544	wn2ra4ohzdr.exe	87
PID 3544 wrote to memory of 4840	3544	wn2ra4ohzdr.exe	87
PID 3544 wrote to memory of 4840	3544	wn2ra4ohzdr.exe	87
PID 3544 wrote to memory of 4840	3544	wn2ra4ohzdr.exe	87
PID 3544 wrote to memory of 4840	3544	wn2ra4ohzdr.exe	87
PID 3544 wrote to memory of 4840	3544	wn2ra4ohzdr.exe	87
PID 3544 wrote to memory of 4840	3544	wn2ra4ohzdr.exe	87
PID 3544 wrote to memory of 4840	3544	wn2ra4ohzdr.exe	87

C:\Users\Admin\AppData\Local\Temp\4026ddd4aa8ec497c63fdffdd444e526_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\4026ddd4aa8ec497c63fdffdd444e526_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4652
- C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe
  "C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3544
- - C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe
    "C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:4840

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

Query Registry

1

T1012

System Information Discovery

2

T1082

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:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe

Filesize
131KB

MD5
45bcf2044c99abe1ae14f93c825afddb

SHA1
3b40f81023f9597aac69c3324d3e9f37829663c8

SHA256
d742acbad67e97a547276e0a472a098d6ba4206c59525e1d2ab9afbb8acac07e

SHA512
3d3a42be869fcdd73673bbc25d013af1cf213cf278da506bf2d8f56b8531e9074309e0fdd6e580b275abd33ce5b0817b4058bd6918d6d2d4dbcb65dd5d18bcdf

Download Submit
memory/3544-37-0x0000000074D50000-0x0000000075500000-memory.dmp

Filesize
7.7MB

Download
memory/3544-33-0x0000000074D50000-0x0000000075500000-memory.dmp

Filesize
7.7MB

Download
memory/3544-22-0x0000000074D50000-0x0000000075500000-memory.dmp

Filesize
7.7MB

Download
memory/3544-21-0x0000000074D50000-0x0000000075500000-memory.dmp

Filesize
7.7MB

Download
memory/4652-20-0x0000000074D50000-0x0000000075500000-memory.dmp

Filesize
7.7MB

Download
memory/4652-2-0x00000000056F0000-0x0000000005C94000-memory.dmp

Filesize
5.6MB

Download
memory/4652-5-0x0000000074D50000-0x0000000075500000-memory.dmp

Filesize
7.7MB

Download
memory/4652-0-0x0000000074D5E000-0x0000000074D5F000-memory.dmp

Filesize
4KB

Download
memory/4652-4-0x00000000050F0000-0x00000000050FA000-memory.dmp

Filesize
40KB

Download
memory/4652-3-0x0000000005140000-0x00000000051D2000-memory.dmp

Filesize
584KB

Download
memory/4652-1-0x0000000000710000-0x0000000000738000-memory.dmp

Filesize
160KB

Download
memory/4652-6-0x0000000005440000-0x0000000005460000-memory.dmp

Filesize
128KB

Download
memory/4840-27-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4840-23-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4840-29-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4840-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4840-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4840-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads