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

Executes dropped EXE 2 IoCs

pid	Process
1900	wn2ra4ohzdr.exe
2012	wn2ra4ohzdr.exe

Loads dropped DLL 1 IoCs

pid	Process
1764	4026ddd4aa8ec497c63fdffdd444e526_JaffaCakes118.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-1-5-21-312935884-697965778-3955649944-1000\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 1900 set thread context of 2012	1900	wn2ra4ohzdr.exe	32

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
2012	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1764 wrote to memory of 1900	1764	4026ddd4aa8ec497c63fdffdd444e526_JaffaCakes118.exe	31
PID 1764 wrote to memory of 1900	1764	4026ddd4aa8ec497c63fdffdd444e526_JaffaCakes118.exe	31
PID 1764 wrote to memory of 1900	1764	4026ddd4aa8ec497c63fdffdd444e526_JaffaCakes118.exe	31
PID 1764 wrote to memory of 1900	1764	4026ddd4aa8ec497c63fdffdd444e526_JaffaCakes118.exe	31
PID 1900 wrote to memory of 2012	1900	wn2ra4ohzdr.exe	32
PID 1900 wrote to memory of 2012	1900	wn2ra4ohzdr.exe	32
PID 1900 wrote to memory of 2012	1900	wn2ra4ohzdr.exe	32
PID 1900 wrote to memory of 2012	1900	wn2ra4ohzdr.exe	32
PID 1900 wrote to memory of 2012	1900	wn2ra4ohzdr.exe	32
PID 1900 wrote to memory of 2012	1900	wn2ra4ohzdr.exe	32
PID 1900 wrote to memory of 2012	1900	wn2ra4ohzdr.exe	32
PID 1900 wrote to memory of 2012	1900	wn2ra4ohzdr.exe	32
PID 1900 wrote to memory of 2012	1900	wn2ra4ohzdr.exe	32
PID 1900 wrote to memory of 2012	1900	wn2ra4ohzdr.exe	32

C:\Users\Admin\AppData\Local\Temp\4026ddd4aa8ec497c63fdffdd444e526_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\4026ddd4aa8ec497c63fdffdd444e526_JaffaCakes118.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1764
- 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:1900
- - 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:2012

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 Information Discovery

1

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
e09b0c182b50b929ae764865dc866b3c

SHA1
e7ad3d2e6abbc086c5f285a594672933d70ff109

SHA256
2bb0ef5ae5c85b8d004939b08e0d9057bd50c393529d095912dbe5dc0379eb2c

SHA512
4bf2b253c3042b58d9f86715cdf33a36b3c9491324baf3d7d2e3da06900e8461ddf51ffab20eae56da97f06d1ab837d03b38f5cfe807739006f0d6db5ee7c0ab

Download Submit
memory/1764-1-0x0000000000D10000-0x0000000000D38000-memory.dmp

Filesize
160KB

Download
memory/1764-2-0x0000000074240000-0x000000007492E000-memory.dmp

Filesize
6.9MB

Download
memory/1764-3-0x0000000000A00000-0x0000000000A20000-memory.dmp

Filesize
128KB

Download
memory/1764-13-0x0000000074240000-0x000000007492E000-memory.dmp

Filesize
6.9MB

Download
memory/1764-0-0x000000007424E000-0x000000007424F000-memory.dmp

Filesize
4KB

Download
memory/1900-40-0x0000000074240000-0x000000007492E000-memory.dmp

Filesize
6.9MB

Download
memory/1900-12-0x0000000074240000-0x000000007492E000-memory.dmp

Filesize
6.9MB

Download
memory/1900-14-0x00000000011D0000-0x00000000011F8000-memory.dmp

Filesize
160KB

Download
memory/1900-15-0x0000000074240000-0x000000007492E000-memory.dmp

Filesize
6.9MB

Download
memory/1900-41-0x0000000074240000-0x000000007492E000-memory.dmp

Filesize
6.9MB

Download
memory/2012-30-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2012-23-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2012-20-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2012-18-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2012-16-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2012-35-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2012-37-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2012-39-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2012-29-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2012-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2012-44-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads