remcos | 4dfffce31d368963e112b158421d46c3f93205c4f7f3795b6ebf9e861b347ffd

General

Target

d985c9d9edff5a8b4863332257b44162_JaffaCakes118.exe
Size

131KB
MD5

d985c9d9edff5a8b4863332257b44162
SHA1

1955de2df2fbaa36bc7274a41e348b7d74b1feaf
SHA256

4dfffce31d368963e112b158421d46c3f93205c4f7f3795b6ebf9e861b347ffd
SHA512

35f3a0a7cdbfb6669127edaa882b8a26df789eb4c235ebda86239dc5b19c5181d5ad022420e83b186048ad05c27564aee24a87fafa9f65cfb4b28fc2f0921eb1
SSDEEP

1536:ITHiPBX4nDzMyRXGHrc9YRHqbTypgpmb5Q+ZReSdhk/J+YLgD3mrxb53cSuYQjKt:xPd4n/M+WLcilrpgGH/GwY87mVmIX9

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
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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	d985c9d9edff5a8b4863332257b44162_JaffaCakes118.exe

Executes dropped EXE 2 IoCs

pid	Process
1292	wn2ra4ohzdr.exe
1720	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-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	d985c9d9edff5a8b4863332257b44162_JaffaCakes118.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1292 set thread context of 1720	1292	wn2ra4ohzdr.exe	91

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	d985c9d9edff5a8b4863332257b44162_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
1720	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4060 wrote to memory of 1292	4060	d985c9d9edff5a8b4863332257b44162_JaffaCakes118.exe	84
PID 4060 wrote to memory of 1292	4060	d985c9d9edff5a8b4863332257b44162_JaffaCakes118.exe	84
PID 4060 wrote to memory of 1292	4060	d985c9d9edff5a8b4863332257b44162_JaffaCakes118.exe	84
PID 1292 wrote to memory of 1720	1292	wn2ra4ohzdr.exe	91
PID 1292 wrote to memory of 1720	1292	wn2ra4ohzdr.exe	91
PID 1292 wrote to memory of 1720	1292	wn2ra4ohzdr.exe	91
PID 1292 wrote to memory of 1720	1292	wn2ra4ohzdr.exe	91
PID 1292 wrote to memory of 1720	1292	wn2ra4ohzdr.exe	91
PID 1292 wrote to memory of 1720	1292	wn2ra4ohzdr.exe	91
PID 1292 wrote to memory of 1720	1292	wn2ra4ohzdr.exe	91
PID 1292 wrote to memory of 1720	1292	wn2ra4ohzdr.exe	91
PID 1292 wrote to memory of 1720	1292	wn2ra4ohzdr.exe	91

C:\Users\Admin\AppData\Local\Temp\d985c9d9edff5a8b4863332257b44162_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\d985c9d9edff5a8b4863332257b44162_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4060
- 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:1292
- - 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:1720

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
35ac81e9823a277ce7e37730d296e19b

SHA1
292218c80a4597e8b8609ddf6d20b5bf688b43ca

SHA256
e7b894817a38c55451488127766e59a4302a64353a9873ba8513e1001f81a80e

SHA512
533dced4175a737b42f1fbaa5c8463f4d610b04263c0c81514eaa311a61818c92f6dfa4362e937d3073c5114e80e1eef3800d74dfa05815d3bc00d4a6b21f561

Download Submit
memory/1292-36-0x0000000074800000-0x0000000074FB0000-memory.dmp

Filesize
7.7MB

Download
memory/1292-34-0x0000000074800000-0x0000000074FB0000-memory.dmp

Filesize
7.7MB

Download
memory/1292-23-0x0000000074800000-0x0000000074FB0000-memory.dmp

Filesize
7.7MB

Download
memory/1292-22-0x0000000074800000-0x0000000074FB0000-memory.dmp

Filesize
7.7MB

Download
memory/1720-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1720-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1720-31-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1720-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1720-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1720-27-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4060-21-0x0000000074800000-0x0000000074FB0000-memory.dmp

Filesize
7.7MB

Download
memory/4060-3-0x0000000004DB0000-0x0000000004E42000-memory.dmp

Filesize
584KB

Download
memory/4060-4-0x0000000004E50000-0x0000000004E5A000-memory.dmp

Filesize
40KB

Download
memory/4060-6-0x0000000004FF0000-0x0000000005010000-memory.dmp

Filesize
128KB

Download
memory/4060-0-0x000000007480E000-0x000000007480F000-memory.dmp

Filesize
4KB

Download
memory/4060-5-0x0000000074800000-0x0000000074FB0000-memory.dmp

Filesize
7.7MB

Download
memory/4060-10-0x000000007480E000-0x000000007480F000-memory.dmp

Filesize
4KB

Download
memory/4060-2-0x00000000052C0000-0x0000000005864000-memory.dmp

Filesize
5.6MB

Download
memory/4060-1-0x00000000003C0000-0x00000000003E8000-memory.dmp

Filesize
160KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads