remcos | 4e31114ffd1000c0242b7537d6329641dc0457dcd6590c57659326a1785ce2f7

General

Target

4e31114ffd1000c0242b7537d6329641dc0457dcd6590c57659326a1785ce2f7.exe
Size

1.3MB
MD5

3b921ff1f40f6c6182e84a476152aaf3
SHA1

19db03733444cca5868939074c002de3d4b10948
SHA256

4e31114ffd1000c0242b7537d6329641dc0457dcd6590c57659326a1785ce2f7
SHA512

2546f5d93d5e9a87416d880cad06a95275a9c441aef6481f5fd74cba8ecfe45d29c4486f2593f9567d5aa3e3d88eeaaf89b15f26da31f91cf869cfdb303c7ccc
SSDEEP

24576:V5ZWs+OZVEWry8AFaxtFyar0HteJyUt/1T7fQlbNW6AVDnSwRC4envs:jZB1G8YYFyaQW/1v4QnSwRC4Uvs

Score

10^/10

remcos ��s�÷d discovery persistence rat

Malware Config

Extracted

Family

remcos

Botnet

��s�÷d

C2

190.6.65.2:25158

microsoft.bnctechnology.space:36546

microsoft.bnctechnology.space:541

Attributes

audio_folder
?§J?°Û¤ù
audio_record_time
5
connect_delay
60
connect_interval
60
copy_file
Virtual.exe
copy_folder
Oracle
delete_file
true
hide_file
true
hide_keylog_file
true
install_flag
true
install_path
%Temp%
keylog_crypt
true
keylog_file
Microsofts.dat
keylog_flag
false
keylog_folder
Microsoft
mouse_option
false
mutex
juyrkrgj-UGC846
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
ºI?
screenshot_path
%AppData%
screenshot_time
10
startup_value
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

Adds policy Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	Lin.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\juyrkrgj-UGC846 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Oracle\\Virtual.exe\""	Lin.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	Virtual.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\juyrkrgj-UGC846 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Oracle\\Virtual.exe\""	Virtual.exe

Checks computer location settings 2 TTPs 2 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	Lin.exe
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	4e31114ffd1000c0242b7537d6329641dc0457dcd6590c57659326a1785ce2f7.exe

Executes dropped EXE 3 IoCs

pid	Process
3272	login.exe
2572	Lin.exe
4496	Virtual.exe

Adds Run key to start application 2 TTPs 4 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\juyrkrgj-UGC846 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Oracle\\Virtual.exe\""	Lin.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\juyrkrgj-UGC846 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Oracle\\Virtual.exe\""	Lin.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\juyrkrgj-UGC846 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Oracle\\Virtual.exe\""	Virtual.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\juyrkrgj-UGC846 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Oracle\\Virtual.exe\""	Virtual.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4496 set thread context of 2996	4496	Virtual.exe	89

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	login.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Virtual.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Lin.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	Lin.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
4496	Virtual.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3272	login.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
3272	login.exe
3272	login.exe
3272	login.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 2512 wrote to memory of 3272	2512	4e31114ffd1000c0242b7537d6329641dc0457dcd6590c57659326a1785ce2f7.exe	85
PID 2512 wrote to memory of 3272	2512	4e31114ffd1000c0242b7537d6329641dc0457dcd6590c57659326a1785ce2f7.exe	85
PID 2512 wrote to memory of 3272	2512	4e31114ffd1000c0242b7537d6329641dc0457dcd6590c57659326a1785ce2f7.exe	85
PID 2512 wrote to memory of 2572	2512	4e31114ffd1000c0242b7537d6329641dc0457dcd6590c57659326a1785ce2f7.exe	87
PID 2512 wrote to memory of 2572	2512	4e31114ffd1000c0242b7537d6329641dc0457dcd6590c57659326a1785ce2f7.exe	87
PID 2512 wrote to memory of 2572	2512	4e31114ffd1000c0242b7537d6329641dc0457dcd6590c57659326a1785ce2f7.exe	87
PID 2572 wrote to memory of 4496	2572	Lin.exe	88
PID 2572 wrote to memory of 4496	2572	Lin.exe	88
PID 2572 wrote to memory of 4496	2572	Lin.exe	88
PID 4496 wrote to memory of 2996	4496	Virtual.exe	89
PID 4496 wrote to memory of 2996	4496	Virtual.exe	89
PID 4496 wrote to memory of 2996	4496	Virtual.exe	89
PID 4496 wrote to memory of 2996	4496	Virtual.exe	89

C:\Users\Admin\AppData\Local\Temp\4e31114ffd1000c0242b7537d6329641dc0457dcd6590c57659326a1785ce2f7.exe
"C:\Users\Admin\AppData\Local\Temp\4e31114ffd1000c0242b7537d6329641dc0457dcd6590c57659326a1785ce2f7.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2512
- C:\Users\Admin\AppData\Local\Temp\login.exe
  "C:\Users\Admin\AppData\Local\Temp\login.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:3272
- C:\Users\Admin\AppData\Local\Temp\Lin.exe
  "C:\Users\Admin\AppData\Local\Temp\Lin.exe"
  2⤵
  - Adds policy Run key to start application
  - Checks computer location settings
  - Executes dropped EXE
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2572
- - C:\Users\Admin\AppData\Local\Temp\Oracle\Virtual.exe
    "C:\Users\Admin\AppData\Local\Temp\Oracle\Virtual.exe"
    3⤵
    - Adds policy Run key to start application
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of WriteProcessMemory
    PID:4496
  - - C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      4⤵
      PID:2996

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

2

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

2

T1547.001

Defense Evasion

Modify Registry

2

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\Local\Temp\Lin.exe

Filesize
464KB

MD5
87ba961523f14b4cd25dfc6a96c1fa8c

SHA1
88b195f9d4934b170c9ccaa912b3efb362e7cb18

SHA256
2b3b023ebdc553863c84edb66c969da68fb5e505a203224ac72855d7359aae30

SHA512
be7e65d25525dcea8a871db7a2bc08a45723cd69bf6b292ceb5f751079d64a0e3b19f657f6963f0e8d80ae9a13e981693130699f43b045c4d2da15a86dfa3b17

Download Submit
C:\Users\Admin\AppData\Local\Temp\list_1737420149.txt

Filesize
246B

MD5
082d28cdce942516e1963ca567e6a3df

SHA1
7d7ade0680de6d8c0fcec3f8d24884744047667a

SHA256
8bd3c2a4d886b093b425cf9cecf87b11cca89258939e806c6dbd2e36cb679082

SHA512
c46994a59568d9d056360358e70423874bc21bee6d86b4a0851a468889e21e56b765759266ba63f183490ded53b6a6499468ece22f3465c3a74ea742bed0aa6a

Download Submit
C:\Users\Admin\AppData\Local\Temp\login.exe

Filesize
968KB

MD5
2921d9fd9cb1b5fd59534d0a6423bb07

SHA1
80c39f75e6385d49162302e8bd78d91acefda14f

SHA256
2494294241bafe261e88d3ac7345ebe4fc985968ef3294b41f0cfc5855b89df3

SHA512
5e49de0ad5315c3489e5c8c8523b378d00be8f74c94ff9e7d73392a480fa4deaa2c75b65749506b1640e555afc666405e5da07f27e94cde3fe64ff230c2d673c

Download Submit
memory/2572-21-0x0000000000400000-0x000000000047C000-memory.dmp

Filesize
496KB

Download
memory/2996-56-0x0000000000400000-0x000000000047C000-memory.dmp

Filesize
496KB

Download
memory/2996-57-0x0000000000400000-0x000000000047C000-memory.dmp

Filesize
496KB

Download
memory/4496-55-0x0000000000400000-0x000000000047C000-memory.dmp

Filesize
496KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads