remcos | d4e2d35182ab1f55d6a0dee8ecdf3ba1b1df2bd0fda384f25335feb42ae31cfa

General

Target

QUOTATION.exe
Size

181KB
MD5

40361eb24f8fb52b2a653a55afec7952
SHA1

d8bc9d3adac423aee35fc65a224c820eae9ec063
SHA256

a134e9815c6d82b5dd7589b78c3d3ac93f7fbc9ee24072748bd53cdf63164d1c
SHA512

b79fab70b89781b951bbdc5048aca34001d403a3cde4800c7ef94fdb3d3370439920606142579e51800bad681443c16970049535fd24a81897d723a83992e8d8
SSDEEP

3072:4BkfJpRXATwMdFCcob0Z5EcwGXBPWsJzSSFteC7rJpQyjdRjAz+eFXerwxHHYMKy:4qjIQCE3GXBPWLSFteC7rT93jDAXeqH9

Score

10^/10

remcos remotehost discovery persistence rat

Malware Config

Extracted

Family

remcos

Version

2.7.2 Pro

Botnet

RemoteHost

C2

nikkihutsltd.duckdns.org:19139

Attributes

audio_folder
MicRecords
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
chrome
copy_folder
chrome
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
chrome
keylog_path
%AppData%
mouse_option
false
mutex
chrome-T2ENBJ
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
chrome
take_screenshot_option
false
take_screenshot_time
5
take_screenshot_title
wikipedia;solitaire;

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

Loads dropped DLL 2 IoCs

pid	Process
2780	QUOTATION.exe
2780	QUOTATION.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-1-5-21-1385883288-3042840365-2734249351-1000\Software\Microsoft\Windows\CurrentVersion\Run\name = "C:\\Users\\Admin\\AppData\\Roaming\\folder\\file.exe"	QUOTATION.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2780 set thread context of 2828	2780	QUOTATION.exe	30

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 2 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	QUOTATION.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	QUOTATION.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2780	QUOTATION.exe
2780	QUOTATION.exe
2780	QUOTATION.exe
2780	QUOTATION.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2780	QUOTATION.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2828	QUOTATION.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2780 wrote to memory of 2828	2780	QUOTATION.exe	30
PID 2780 wrote to memory of 2828	2780	QUOTATION.exe	30
PID 2780 wrote to memory of 2828	2780	QUOTATION.exe	30
PID 2780 wrote to memory of 2828	2780	QUOTATION.exe	30
PID 2780 wrote to memory of 2828	2780	QUOTATION.exe	30

C:\Users\Admin\AppData\Local\Temp\QUOTATION.exe
"C:\Users\Admin\AppData\Local\Temp\QUOTATION.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2780
- C:\Users\Admin\AppData\Local\Temp\QUOTATION.exe
  "C:\Users\Admin\AppData\Local\Temp\QUOTATION.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:2828

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\Local\Temp\k08cwjcrlzilk8t.dll

Filesize
13KB

MD5
05ad6c2690084ff9cc4ff14b455b781e

SHA1
9b0ff8da652e83aa675bfc5fd7d5c9173d134509

SHA256
97de472526c14080264663f4b729df51c4208a1e37d190a0412076a682f0aa7b

SHA512
e48f4b3ac853d6669f5e9f2dd7516eb268941f50189e6f99a7d5f4ef9bab88709bc6c9c02267e6f61659dba50c67163481376c3cb6d4e5bc7a6641f15b9e309e

Download Submit
C:\Users\Admin\AppData\Roaming\chrome\logs.dat

Filesize
74B

MD5
4ea42f525ae7616245ada74e0edfef06

SHA1
0eb1cc6e54c7f474185f97e0287dd93faa0b7bff

SHA256
03d983a93e92303643e74d8e40aa9cee8f059d95c9a8d1de9660dc1b9b271cd0

SHA512
722fc5135d6931fcdc7d58acffe4728af611e79358928b919e502614d9f8e4f74c0ac60ea36b5d7fd80e00d90203536a0f7bcd0bd1593accdf94ed6f3e8a76e8

Download Submit
\Users\Admin\AppData\Local\Temp\nsd5590.tmp\System.dll

Filesize
11KB

MD5
fccff8cb7a1067e23fd2e2b63971a8e1

SHA1
30e2a9e137c1223a78a0f7b0bf96a1c361976d91

SHA256
6fcea34c8666b06368379c6c402b5321202c11b00889401c743fb96c516c679e

SHA512
f4335e84e6f8d70e462a22f1c93d2998673a7616c868177cac3e8784a3be1d7d0bb96f2583fa0ed82f4f2b6b8f5d9b33521c279a42e055d80a94b4f3f1791e0c

Download Submit
memory/2780-16-0x0000000074450000-0x0000000074458000-memory.dmp

Filesize
32KB

Download
memory/2780-12-0x0000000074450000-0x0000000074458000-memory.dmp

Filesize
32KB

Download
memory/2828-25-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2828-18-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2828-19-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2828-22-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2828-24-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2828-14-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2828-29-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2828-17-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2828-33-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2828-36-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2828-41-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2828-47-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2828-51-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads