remcos | 8f7bceb931af0b38ce7d930de3876f12e8fa36ea1a1ec36fda85bd8cebc89e47

General

Target

JaffaCakes118_7cd1dc5b787dbebc6a5c5e32715f68dd.exe
Size

131KB
MD5

7cd1dc5b787dbebc6a5c5e32715f68dd
SHA1

742c892c6544888ffc40c9c9f74df8ca7a90c6c0
SHA256

8f7bceb931af0b38ce7d930de3876f12e8fa36ea1a1ec36fda85bd8cebc89e47
SHA512

c66635a39262f12c1ac855c2883284dd32ce700950e1cd12a07b3a438fd88167ebff583a2ccec611061c3a89cc701587c4edfef2c86984c2c08eabecde7371f3
SSDEEP

1536:ITHiPBX4nDzMyRXGHrc9YRHqbTypgpmb5Q+ZReSdhk/J+YLgD3mrxb53cSuYQjKg: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
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-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	JaffaCakes118_7cd1dc5b787dbebc6a5c5e32715f68dd.exe

Executes dropped EXE 2 IoCs

pid	Process
3892	wn2ra4ohzdr.exe
3428	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-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	JaffaCakes118_7cd1dc5b787dbebc6a5c5e32715f68dd.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3892 set thread context of 3428	3892	wn2ra4ohzdr.exe	90

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	JaffaCakes118_7cd1dc5b787dbebc6a5c5e32715f68dd.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
3428	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2588 wrote to memory of 3892	2588	JaffaCakes118_7cd1dc5b787dbebc6a5c5e32715f68dd.exe	85
PID 2588 wrote to memory of 3892	2588	JaffaCakes118_7cd1dc5b787dbebc6a5c5e32715f68dd.exe	85
PID 2588 wrote to memory of 3892	2588	JaffaCakes118_7cd1dc5b787dbebc6a5c5e32715f68dd.exe	85
PID 3892 wrote to memory of 3428	3892	wn2ra4ohzdr.exe	90
PID 3892 wrote to memory of 3428	3892	wn2ra4ohzdr.exe	90
PID 3892 wrote to memory of 3428	3892	wn2ra4ohzdr.exe	90
PID 3892 wrote to memory of 3428	3892	wn2ra4ohzdr.exe	90
PID 3892 wrote to memory of 3428	3892	wn2ra4ohzdr.exe	90
PID 3892 wrote to memory of 3428	3892	wn2ra4ohzdr.exe	90
PID 3892 wrote to memory of 3428	3892	wn2ra4ohzdr.exe	90
PID 3892 wrote to memory of 3428	3892	wn2ra4ohzdr.exe	90
PID 3892 wrote to memory of 3428	3892	wn2ra4ohzdr.exe	90

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7cd1dc5b787dbebc6a5c5e32715f68dd.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7cd1dc5b787dbebc6a5c5e32715f68dd.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2588
- 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:3892
- - 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:3428

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
132KB

MD5
13cdf318e778bbe59c93cd46e2438a5f

SHA1
8b67f6dc1fb7b17a6fdc00441689604c9e7782ee

SHA256
b73af8cb847be5ad0d9cecaf033713b9f4053bfdaf6252e8856c9e0c250e2bf9

SHA512
6eebad28bb31a88097ba29bc851e13ed64c0aa1f689215d22ee3b523bf1ea5aab82630e4d403b90ab96571985bcd35e459d3af138e18b70a49cbc1587a154db2

Download Submit
memory/2588-20-0x0000000074500000-0x0000000074CB0000-memory.dmp

Filesize
7.7MB

Download
memory/2588-3-0x0000000004AB0000-0x0000000004B42000-memory.dmp

Filesize
584KB

Download
memory/2588-4-0x0000000004B70000-0x0000000004B7A000-memory.dmp

Filesize
40KB

Download
memory/2588-2-0x0000000005160000-0x0000000005704000-memory.dmp

Filesize
5.6MB

Download
memory/2588-5-0x0000000074500000-0x0000000074CB0000-memory.dmp

Filesize
7.7MB

Download
memory/2588-6-0x0000000004C30000-0x0000000004C50000-memory.dmp

Filesize
128KB

Download
memory/2588-1-0x00000000000F0000-0x0000000000118000-memory.dmp

Filesize
160KB

Download
memory/2588-0-0x000000007450E000-0x000000007450F000-memory.dmp

Filesize
4KB

Download
memory/3428-23-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3428-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3428-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3428-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3428-29-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3428-31-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3892-35-0x0000000074500000-0x0000000074CB0000-memory.dmp

Filesize
7.7MB

Download
memory/3892-22-0x0000000074500000-0x0000000074CB0000-memory.dmp

Filesize
7.7MB

Download
memory/3892-33-0x0000000074500000-0x0000000074CB0000-memory.dmp

Filesize
7.7MB

Download
memory/3892-21-0x0000000074500000-0x0000000074CB0000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads