remcos | bcbf068fe06e92046d33d2cc7cae956dd13525ab85f5c6849a2767df94f943a8

General

Target

9211d1a933cefc5779859ac65263e576_JaffaCakes118.exe
Size

131KB
MD5

9211d1a933cefc5779859ac65263e576
SHA1

873f5863fde77fd3d125af63150ca68300a83a0f
SHA256

bcbf068fe06e92046d33d2cc7cae956dd13525ab85f5c6849a2767df94f943a8
SHA512

33bbdbb503bcaf970f37c7187b979094144aa7b822195d7894e82493ad4f7063e639f8ad0563c4881208a6ebd0ac6ea2474d81351a8a25e31537fb8dd612e4d4
SSDEEP

1536:ITHiPBX4nDzMyRXGHrc9YRHqbTypgpmb5Q+ZReSdhk/J+YLgD3mrxb53cSuYQjKd:xPd4n/M+WLcilrpgGH/GwY87mVmIXt

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	9211d1a933cefc5779859ac65263e576_JaffaCakes118.exe

Executes dropped EXE 2 IoCs

pid	Process
2464	wn2ra4ohzdr.exe
3668	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"	9211d1a933cefc5779859ac65263e576_JaffaCakes118.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2464 set thread context of 3668	2464	wn2ra4ohzdr.exe	98

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	9211d1a933cefc5779859ac65263e576_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
3668	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3680 wrote to memory of 2464	3680	9211d1a933cefc5779859ac65263e576_JaffaCakes118.exe	94
PID 3680 wrote to memory of 2464	3680	9211d1a933cefc5779859ac65263e576_JaffaCakes118.exe	94
PID 3680 wrote to memory of 2464	3680	9211d1a933cefc5779859ac65263e576_JaffaCakes118.exe	94
PID 2464 wrote to memory of 3668	2464	wn2ra4ohzdr.exe	98
PID 2464 wrote to memory of 3668	2464	wn2ra4ohzdr.exe	98
PID 2464 wrote to memory of 3668	2464	wn2ra4ohzdr.exe	98
PID 2464 wrote to memory of 3668	2464	wn2ra4ohzdr.exe	98
PID 2464 wrote to memory of 3668	2464	wn2ra4ohzdr.exe	98
PID 2464 wrote to memory of 3668	2464	wn2ra4ohzdr.exe	98
PID 2464 wrote to memory of 3668	2464	wn2ra4ohzdr.exe	98
PID 2464 wrote to memory of 3668	2464	wn2ra4ohzdr.exe	98
PID 2464 wrote to memory of 3668	2464	wn2ra4ohzdr.exe	98

C:\Users\Admin\AppData\Local\Temp\9211d1a933cefc5779859ac65263e576_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\9211d1a933cefc5779859ac65263e576_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3680
- 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:2464
- - 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:3668

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
85d9fa60834afd5d5d25ac74f7bd215e

SHA1
b945c5c72ca896cae442365440ff1e077471bc19

SHA256
4ca00cf5236d3ec9126212f9b692aa0be3ed136a1648b6332b286e1aa46602ca

SHA512
a63f9826d5121a2d7e588d64c8e5441d8a51ad7f060ff1fd256352432ce4885c9c1142e2e17e72e0d522f98d32bba9001eb73e6a8d453fc9a899dafee6f24935

Download Submit
memory/2464-36-0x00000000751A0000-0x0000000075950000-memory.dmp

Filesize
7.7MB

Download
memory/2464-34-0x00000000751A0000-0x0000000075950000-memory.dmp

Filesize
7.7MB

Download
memory/2464-23-0x00000000751A0000-0x0000000075950000-memory.dmp

Filesize
7.7MB

Download
memory/2464-22-0x00000000751A0000-0x0000000075950000-memory.dmp

Filesize
7.7MB

Download
memory/3668-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3668-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3668-31-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3668-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3668-27-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3668-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3680-21-0x00000000751A0000-0x0000000075950000-memory.dmp

Filesize
7.7MB

Download
memory/3680-3-0x0000000005280000-0x0000000005312000-memory.dmp

Filesize
584KB

Download
memory/3680-4-0x0000000005350000-0x000000000535A000-memory.dmp

Filesize
40KB

Download
memory/3680-6-0x00000000053B0000-0x00000000053D0000-memory.dmp

Filesize
128KB

Download
memory/3680-0-0x00000000751AE000-0x00000000751AF000-memory.dmp

Filesize
4KB

Download
memory/3680-20-0x00000000751AE000-0x00000000751AF000-memory.dmp

Filesize
4KB

Download
memory/3680-5-0x00000000751A0000-0x0000000075950000-memory.dmp

Filesize
7.7MB

Download
memory/3680-2-0x00000000058E0000-0x0000000005E84000-memory.dmp

Filesize
5.6MB

Download
memory/3680-1-0x00000000008C0000-0x00000000008E8000-memory.dmp

Filesize
160KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads