remcos | 889e674614c4135997d1af3657a6093fdc036e78ce03b93a42cd8f8e47a5a946

General

Target

ef77ba9ee6a9e2800860724eb9baba03_JaffaCakes118.exe
Size

131KB
MD5

ef77ba9ee6a9e2800860724eb9baba03
SHA1

8fb2d3bfe841a17d2071515aa2b74cb3564b347d
SHA256

889e674614c4135997d1af3657a6093fdc036e78ce03b93a42cd8f8e47a5a946
SHA512

3c32bfd23fe0eb271fa0c551e3677e28606012436d07b1a65fdaa363bc44fc5f6ce1b485e7059c35b08f37d7f64c8ef13e470353f7172ae820f8e704340916fa
SSDEEP

1536:ITHiPBX4nDzMyRXGHrc9YRHqbTypgpmb5Q+ZReSdhk/J+YLgD3mrxb53cSuYQjKV:xPd4n/M+WLcilrpgGH/GwY87mVmIXl

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-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	ef77ba9ee6a9e2800860724eb9baba03_JaffaCakes118.exe

Executes dropped EXE 2 IoCs

pid	Process
2920	wn2ra4ohzdr.exe
3152	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-1-5-21-3350944739-639801879-157714471-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	ef77ba9ee6a9e2800860724eb9baba03_JaffaCakes118.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2920 set thread context of 3152	2920	wn2ra4ohzdr.exe	95

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	ef77ba9ee6a9e2800860724eb9baba03_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
3152	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1208 wrote to memory of 2920	1208	ef77ba9ee6a9e2800860724eb9baba03_JaffaCakes118.exe	87
PID 1208 wrote to memory of 2920	1208	ef77ba9ee6a9e2800860724eb9baba03_JaffaCakes118.exe	87
PID 1208 wrote to memory of 2920	1208	ef77ba9ee6a9e2800860724eb9baba03_JaffaCakes118.exe	87
PID 2920 wrote to memory of 3152	2920	wn2ra4ohzdr.exe	95
PID 2920 wrote to memory of 3152	2920	wn2ra4ohzdr.exe	95
PID 2920 wrote to memory of 3152	2920	wn2ra4ohzdr.exe	95
PID 2920 wrote to memory of 3152	2920	wn2ra4ohzdr.exe	95
PID 2920 wrote to memory of 3152	2920	wn2ra4ohzdr.exe	95
PID 2920 wrote to memory of 3152	2920	wn2ra4ohzdr.exe	95
PID 2920 wrote to memory of 3152	2920	wn2ra4ohzdr.exe	95
PID 2920 wrote to memory of 3152	2920	wn2ra4ohzdr.exe	95
PID 2920 wrote to memory of 3152	2920	wn2ra4ohzdr.exe	95

C:\Users\Admin\AppData\Local\Temp\ef77ba9ee6a9e2800860724eb9baba03_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\ef77ba9ee6a9e2800860724eb9baba03_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1208
- 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:2920
- - 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:3152

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
eef8fb3368bb979aee36e9957425dbf3

SHA1
1ebd270427b2da98cf5a4ca3a0067c1e827e36b3

SHA256
8c21c911af602a3a39214b7f36236c17eb334fb57ddd51ea3744b1564d1e5061

SHA512
dcc5a6473bc5dec73bddc4b0c5fe56087ad9c3bddf08166bd5896755c56f7d170b54cf1bb0f5666725a038f535b73567439a9676c9d6c465b2667e3bebd50791

Download Submit
memory/1208-20-0x0000000074F10000-0x00000000756C0000-memory.dmp

Filesize
7.7MB

Download
memory/1208-3-0x00000000053A0000-0x0000000005432000-memory.dmp

Filesize
584KB

Download
memory/1208-4-0x0000000074F10000-0x00000000756C0000-memory.dmp

Filesize
7.7MB

Download
memory/1208-2-0x0000000005950000-0x0000000005EF4000-memory.dmp

Filesize
5.6MB

Download
memory/1208-5-0x0000000005450000-0x000000000545A000-memory.dmp

Filesize
40KB

Download
memory/1208-6-0x0000000005730000-0x0000000005750000-memory.dmp

Filesize
128KB

Download
memory/1208-1-0x00000000009C0000-0x00000000009E8000-memory.dmp

Filesize
160KB

Download
memory/1208-0-0x0000000074F1E000-0x0000000074F1F000-memory.dmp

Filesize
4KB

Download
memory/2920-35-0x0000000074F10000-0x00000000756C0000-memory.dmp

Filesize
7.7MB

Download
memory/2920-22-0x0000000074F10000-0x00000000756C0000-memory.dmp

Filesize
7.7MB

Download
memory/2920-33-0x0000000074F10000-0x00000000756C0000-memory.dmp

Filesize
7.7MB

Download
memory/2920-21-0x0000000074F10000-0x00000000756C0000-memory.dmp

Filesize
7.7MB

Download
memory/3152-23-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3152-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3152-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3152-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3152-29-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3152-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads