remcos | 53fac46129abda3d4e515a3bec0980ca1e44ba57fd7aeec3d624bd9aa6680526

General

Target

a4d856eb0a221fa7ca6c020db37b0c25_JaffaCakes118.exe
Size

131KB
MD5

a4d856eb0a221fa7ca6c020db37b0c25
SHA1

c81ff23cc49a0b3e66451df743a001e0c7ffe65d
SHA256

53fac46129abda3d4e515a3bec0980ca1e44ba57fd7aeec3d624bd9aa6680526
SHA512

e784ed6e07875fd10fa1c0aeca21e84a60f64e2b15f127cbcd1bf847c99fab31eb2b211b2118de3b15dcf3a1176408ea4b8a217c683a4096ae273663dbb4bd49
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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	a4d856eb0a221fa7ca6c020db37b0c25_JaffaCakes118.exe

Executes dropped EXE 2 IoCs

pid	Process
3040	wn2ra4ohzdr.exe
1220	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"	a4d856eb0a221fa7ca6c020db37b0c25_JaffaCakes118.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3040 set thread context of 1220	3040	wn2ra4ohzdr.exe	96

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	a4d856eb0a221fa7ca6c020db37b0c25_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
1220	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2596 wrote to memory of 3040	2596	a4d856eb0a221fa7ca6c020db37b0c25_JaffaCakes118.exe	91
PID 2596 wrote to memory of 3040	2596	a4d856eb0a221fa7ca6c020db37b0c25_JaffaCakes118.exe	91
PID 2596 wrote to memory of 3040	2596	a4d856eb0a221fa7ca6c020db37b0c25_JaffaCakes118.exe	91
PID 3040 wrote to memory of 1220	3040	wn2ra4ohzdr.exe	96
PID 3040 wrote to memory of 1220	3040	wn2ra4ohzdr.exe	96
PID 3040 wrote to memory of 1220	3040	wn2ra4ohzdr.exe	96
PID 3040 wrote to memory of 1220	3040	wn2ra4ohzdr.exe	96
PID 3040 wrote to memory of 1220	3040	wn2ra4ohzdr.exe	96
PID 3040 wrote to memory of 1220	3040	wn2ra4ohzdr.exe	96
PID 3040 wrote to memory of 1220	3040	wn2ra4ohzdr.exe	96
PID 3040 wrote to memory of 1220	3040	wn2ra4ohzdr.exe	96
PID 3040 wrote to memory of 1220	3040	wn2ra4ohzdr.exe	96

C:\Users\Admin\AppData\Local\Temp\a4d856eb0a221fa7ca6c020db37b0c25_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\a4d856eb0a221fa7ca6c020db37b0c25_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2596
- 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:3040
- - 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:1220

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
93251b05ad0c641a99c41c443a37965c

SHA1
65259454fdb8c4aa3e057c8b3c27f5139c72eda0

SHA256
d594677aa94452c7eec73d61af5f865fe55461d8638d3ffa8756f55d0be1444b

SHA512
e407b5c69aad1892e125dfd1c7453dfebd2272c1ba030b7009e2db3e0e4699abfcc4b753791df87c1abab304ce0e2307f73d65b04df0ca9a1382fe36978f04ab

Download Submit
memory/1220-31-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1220-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1220-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1220-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1220-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1220-27-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2596-5-0x0000000074BD0000-0x0000000075380000-memory.dmp

Filesize
7.7MB

Download
memory/2596-16-0x0000000074BDE000-0x0000000074BDF000-memory.dmp

Filesize
4KB

Download
memory/2596-21-0x0000000074BD0000-0x0000000075380000-memory.dmp

Filesize
7.7MB

Download
memory/2596-6-0x0000000004C50000-0x0000000004C70000-memory.dmp

Filesize
128KB

Download
memory/2596-0-0x0000000074BDE000-0x0000000074BDF000-memory.dmp

Filesize
4KB

Download
memory/2596-4-0x0000000004AE0000-0x0000000004AEA000-memory.dmp

Filesize
40KB

Download
memory/2596-3-0x0000000004B20000-0x0000000004BB2000-memory.dmp

Filesize
584KB

Download
memory/2596-2-0x00000000050D0000-0x0000000005674000-memory.dmp

Filesize
5.6MB

Download
memory/2596-1-0x00000000000F0000-0x0000000000118000-memory.dmp

Filesize
160KB

Download
memory/3040-22-0x0000000074BD0000-0x0000000075380000-memory.dmp

Filesize
7.7MB

Download
memory/3040-23-0x0000000074BD0000-0x0000000075380000-memory.dmp

Filesize
7.7MB

Download
memory/3040-34-0x0000000074BD0000-0x0000000075380000-memory.dmp

Filesize
7.7MB

Download
memory/3040-36-0x0000000074BD0000-0x0000000075380000-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