remcos | 5e586f9a00dbb0c1a83e309dc03851ec8b44d79c1503a09f704cceed436aa568

General

Target

aed15864de8fa3038422fd6aea3439a0_JaffaCakes118.exe
Size

131KB
MD5

aed15864de8fa3038422fd6aea3439a0
SHA1

389b1ac75d0f3506437299532e120a89950b2845
SHA256

5e586f9a00dbb0c1a83e309dc03851ec8b44d79c1503a09f704cceed436aa568
SHA512

1cb3471d71b2a40e4143e0eafeccf9f13f71084510a7cc4804d236c86db7ce12a72852c217dd9e70c445f6873183d8786eaea98fc83a9f99544e799d6b263c0d
SSDEEP

1536:ITHiPBX4nDzMyRXGHrc9YRHqbTypgpmb5Q+ZReSdhk/J+YLgD3mrxb53cSuYQjKP:xPd4n/M+WLcilrpgGH/GwY87mVmIXf

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-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	aed15864de8fa3038422fd6aea3439a0_JaffaCakes118.exe

Executes dropped EXE 2 IoCs

pid	Process
4744	wn2ra4ohzdr.exe
3680	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-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	aed15864de8fa3038422fd6aea3439a0_JaffaCakes118.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4744 set thread context of 3680	4744	wn2ra4ohzdr.exe	90

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	aed15864de8fa3038422fd6aea3439a0_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
3680	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3888 wrote to memory of 4744	3888	aed15864de8fa3038422fd6aea3439a0_JaffaCakes118.exe	89
PID 3888 wrote to memory of 4744	3888	aed15864de8fa3038422fd6aea3439a0_JaffaCakes118.exe	89
PID 3888 wrote to memory of 4744	3888	aed15864de8fa3038422fd6aea3439a0_JaffaCakes118.exe	89
PID 4744 wrote to memory of 3680	4744	wn2ra4ohzdr.exe	90
PID 4744 wrote to memory of 3680	4744	wn2ra4ohzdr.exe	90
PID 4744 wrote to memory of 3680	4744	wn2ra4ohzdr.exe	90
PID 4744 wrote to memory of 3680	4744	wn2ra4ohzdr.exe	90
PID 4744 wrote to memory of 3680	4744	wn2ra4ohzdr.exe	90
PID 4744 wrote to memory of 3680	4744	wn2ra4ohzdr.exe	90
PID 4744 wrote to memory of 3680	4744	wn2ra4ohzdr.exe	90
PID 4744 wrote to memory of 3680	4744	wn2ra4ohzdr.exe	90
PID 4744 wrote to memory of 3680	4744	wn2ra4ohzdr.exe	90

C:\Users\Admin\AppData\Local\Temp\aed15864de8fa3038422fd6aea3439a0_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\aed15864de8fa3038422fd6aea3439a0_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3888
- 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:4744
- - 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:3680

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
e8eb9dd36f4c8c0c006c83c77c2d9262

SHA1
bbed1891b6630a20f9c920f133dec0a62bf29385

SHA256
8913e91dbebd61948f80b009d2610df73cbe0e9d51a9812f9a79de03a02da054

SHA512
0d8e59adfefb4b475cccb611769cbe8c9c34bf80ddadcdc0186130aac0aa4c007e83266210a743c1f65f71c0ca6ec08d7565e2c509e53e4629f348b1ebcdeae4

Download Submit
memory/3680-32-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3680-31-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3680-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3680-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3680-28-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3680-27-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3888-5-0x0000000074C50000-0x0000000075400000-memory.dmp

Filesize
7.7MB

Download
memory/3888-2-0x00000000055C0000-0x0000000005B64000-memory.dmp

Filesize
5.6MB

Download
memory/3888-21-0x0000000074C50000-0x0000000075400000-memory.dmp

Filesize
7.7MB

Download
memory/3888-1-0x00000000006F0000-0x0000000000718000-memory.dmp

Filesize
160KB

Download
memory/3888-9-0x0000000074C5E000-0x0000000074C5F000-memory.dmp

Filesize
4KB

Download
memory/3888-3-0x0000000005010000-0x00000000050A2000-memory.dmp

Filesize
584KB

Download
memory/3888-6-0x0000000005200000-0x0000000005220000-memory.dmp

Filesize
128KB

Download
memory/3888-0-0x0000000074C5E000-0x0000000074C5F000-memory.dmp

Filesize
4KB

Download
memory/3888-4-0x0000000004FA0000-0x0000000004FAA000-memory.dmp

Filesize
40KB

Download
memory/4744-24-0x0000000074C50000-0x0000000075400000-memory.dmp

Filesize
7.7MB

Download
memory/4744-23-0x0000000074C50000-0x0000000075400000-memory.dmp

Filesize
7.7MB

Download
memory/4744-22-0x0000000074C50000-0x0000000075400000-memory.dmp

Filesize
7.7MB

Download
memory/4744-35-0x0000000074C50000-0x0000000075400000-memory.dmp

Filesize
7.7MB

Download
memory/4744-37-0x0000000074C50000-0x0000000075400000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads