remcos | e76a41afa56e1f181a5f870938a96080a15600c63735335b58df3cd021c163d4

General

Target

a3720759f7a642fd6a6693df27c30296_JaffaCakes118.exe
Size

131KB
MD5

a3720759f7a642fd6a6693df27c30296
SHA1

02f94dc2f13852e980f9623814e187722bc908ef
SHA256

e76a41afa56e1f181a5f870938a96080a15600c63735335b58df3cd021c163d4
SHA512

766f2def12916fc1a8231f9f67e6efbf035c5dd7342c2f87d691a9f2ff9bacb1013ebd798d2f3054ba014070aec9897b931faed4103207297dbafee0aa28d0ca
SSDEEP

1536:ITHiPBX4nDzMyRXGHrc9YRHqbTypgpmb5Q+ZReSdhk/J+YLgD3mrxb53cSuYQjKp:xPd4n/M+WLcilrpgGH/GwY87mVmIXZ

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-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	a3720759f7a642fd6a6693df27c30296_JaffaCakes118.exe

Executes dropped EXE 2 IoCs

pid	Process
4512	wn2ra4ohzdr.exe
1168	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-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	a3720759f7a642fd6a6693df27c30296_JaffaCakes118.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4512 set thread context of 1168	4512	wn2ra4ohzdr.exe	97

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	a3720759f7a642fd6a6693df27c30296_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
1168	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4636 wrote to memory of 4512	4636	a3720759f7a642fd6a6693df27c30296_JaffaCakes118.exe	93
PID 4636 wrote to memory of 4512	4636	a3720759f7a642fd6a6693df27c30296_JaffaCakes118.exe	93
PID 4636 wrote to memory of 4512	4636	a3720759f7a642fd6a6693df27c30296_JaffaCakes118.exe	93
PID 4512 wrote to memory of 1168	4512	wn2ra4ohzdr.exe	97
PID 4512 wrote to memory of 1168	4512	wn2ra4ohzdr.exe	97
PID 4512 wrote to memory of 1168	4512	wn2ra4ohzdr.exe	97
PID 4512 wrote to memory of 1168	4512	wn2ra4ohzdr.exe	97
PID 4512 wrote to memory of 1168	4512	wn2ra4ohzdr.exe	97
PID 4512 wrote to memory of 1168	4512	wn2ra4ohzdr.exe	97
PID 4512 wrote to memory of 1168	4512	wn2ra4ohzdr.exe	97
PID 4512 wrote to memory of 1168	4512	wn2ra4ohzdr.exe	97
PID 4512 wrote to memory of 1168	4512	wn2ra4ohzdr.exe	97

C:\Users\Admin\AppData\Local\Temp\a3720759f7a642fd6a6693df27c30296_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\a3720759f7a642fd6a6693df27c30296_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4636
- 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:4512
- - 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:1168

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe

Filesize
131KB

MD5
898afed22517fed942a66debad38d3b1

SHA1
349ea01a3fd2bf7397c5d7b2e6e78f75c86923f4

SHA256
4ca8a0767e413a04b8fcbdf227f833564770a0ba132f09a59431dd7eb24597fd

SHA512
542815035707892027a1c7e1c85cdf1f7930e7ea82ffa91aae9aaa518e17564463121abf4fc5ad14039bb4d6a0b93a403ee147c22a8e3c51029696c5e55ef2df

Download Submit
memory/1168-31-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1168-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1168-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1168-27-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1168-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1168-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4512-22-0x0000000075020000-0x00000000757D0000-memory.dmp

Filesize
7.7MB

Download
memory/4512-23-0x0000000075020000-0x00000000757D0000-memory.dmp

Filesize
7.7MB

Download
memory/4512-34-0x0000000075020000-0x00000000757D0000-memory.dmp

Filesize
7.7MB

Download
memory/4512-36-0x0000000075020000-0x00000000757D0000-memory.dmp

Filesize
7.7MB

Download
memory/4636-16-0x000000007502E000-0x000000007502F000-memory.dmp

Filesize
4KB

Download
memory/4636-21-0x0000000075020000-0x00000000757D0000-memory.dmp

Filesize
7.7MB

Download
memory/4636-0-0x000000007502E000-0x000000007502F000-memory.dmp

Filesize
4KB

Download
memory/4636-6-0x00000000055D0000-0x00000000055F0000-memory.dmp

Filesize
128KB

Download
memory/4636-5-0x0000000075020000-0x00000000757D0000-memory.dmp

Filesize
7.7MB

Download
memory/4636-4-0x0000000005250000-0x000000000525A000-memory.dmp

Filesize
40KB

Download
memory/4636-3-0x0000000005310000-0x00000000053A2000-memory.dmp

Filesize
584KB

Download
memory/4636-2-0x00000000058C0000-0x0000000005E64000-memory.dmp

Filesize
5.6MB

Download
memory/4636-1-0x00000000009A0000-0x00000000009C8000-memory.dmp

Filesize
160KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads