remcos | 03fe92bf84effb45dfb4c47da5704f0b35c3ca3b562ac2f46c1da51a8829eb5e

General

Target

03fe92bf84effb45dfb4c47da5704f0b35c3ca3b562ac2f46c1da51a8829eb5e.exe
Size

506KB
MD5

dd935b0e91e2e551b21296d8fa186d11
SHA1

9638372c80f866bdc1b73af7971918e8ba7ab9e7
SHA256

03fe92bf84effb45dfb4c47da5704f0b35c3ca3b562ac2f46c1da51a8829eb5e
SHA512

fdf1ffbeb25f7e0b691c6f0127c297c804d1ecc71579fef69e7d27429902988ee84b34ce2826c49b213f96b1a47d32868ddbcd23d4954d5d80535373fb40d109
SSDEEP

12288:B7MTFoKqS6k0jRWhI/L366W5Fd3IYXCNoSZFDHBa7Pqh:B7MTFoZS6kURFL66seoS3Dha7ih

Score

10^/10

remcos remotehost discovery persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

newkezfill.site:2404

Attributes

audio_folder
MicRecords
audio_path
ApplicationPath
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
Remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-B0AIE8
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
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

Loads dropped DLL 2 IoCs

pid	Process
2872	03fe92bf84effb45dfb4c47da5704f0b35c3ca3b562ac2f46c1da51a8829eb5e.exe
2872	03fe92bf84effb45dfb4c47da5704f0b35c3ca3b562ac2f46c1da51a8829eb5e.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\RunOnce\hulske = "C:\\Users\\Admin\\AppData\\Local\\Temp\\avaliable\\Plderer180.scr"	03fe92bf84effb45dfb4c47da5704f0b35c3ca3b562ac2f46c1da51a8829eb5e.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2240	03fe92bf84effb45dfb4c47da5704f0b35c3ca3b562ac2f46c1da51a8829eb5e.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2872	03fe92bf84effb45dfb4c47da5704f0b35c3ca3b562ac2f46c1da51a8829eb5e.exe
2240	03fe92bf84effb45dfb4c47da5704f0b35c3ca3b562ac2f46c1da51a8829eb5e.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2872 set thread context of 2240	2872	03fe92bf84effb45dfb4c47da5704f0b35c3ca3b562ac2f46c1da51a8829eb5e.exe	83

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	03fe92bf84effb45dfb4c47da5704f0b35c3ca3b562ac2f46c1da51a8829eb5e.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	03fe92bf84effb45dfb4c47da5704f0b35c3ca3b562ac2f46c1da51a8829eb5e.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2872	03fe92bf84effb45dfb4c47da5704f0b35c3ca3b562ac2f46c1da51a8829eb5e.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2872 wrote to memory of 2240	2872	03fe92bf84effb45dfb4c47da5704f0b35c3ca3b562ac2f46c1da51a8829eb5e.exe	83
PID 2872 wrote to memory of 2240	2872	03fe92bf84effb45dfb4c47da5704f0b35c3ca3b562ac2f46c1da51a8829eb5e.exe	83
PID 2872 wrote to memory of 2240	2872	03fe92bf84effb45dfb4c47da5704f0b35c3ca3b562ac2f46c1da51a8829eb5e.exe	83
PID 2872 wrote to memory of 2240	2872	03fe92bf84effb45dfb4c47da5704f0b35c3ca3b562ac2f46c1da51a8829eb5e.exe	83
PID 2872 wrote to memory of 2240	2872	03fe92bf84effb45dfb4c47da5704f0b35c3ca3b562ac2f46c1da51a8829eb5e.exe	83

C:\Users\Admin\AppData\Local\Temp\03fe92bf84effb45dfb4c47da5704f0b35c3ca3b562ac2f46c1da51a8829eb5e.exe
"C:\Users\Admin\AppData\Local\Temp\03fe92bf84effb45dfb4c47da5704f0b35c3ca3b562ac2f46c1da51a8829eb5e.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2872
- C:\Users\Admin\AppData\Local\Temp\03fe92bf84effb45dfb4c47da5704f0b35c3ca3b562ac2f46c1da51a8829eb5e.exe
  "C:\Users\Admin\AppData\Local\Temp\03fe92bf84effb45dfb4c47da5704f0b35c3ca3b562ac2f46c1da51a8829eb5e.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:2240

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\nsc7F92.tmp\System.dll

Filesize
12KB

MD5
0d7ad4f45dc6f5aa87f606d0331c6901

SHA1
48df0911f0484cbe2a8cdd5362140b63c41ee457

SHA256
3eb38ae99653a7dbc724132ee240f6e5c4af4bfe7c01d31d23faf373f9f2eaca

SHA512
c07de7308cb54205e8bd703001a7fe4fd7796c9ac1b4bb330c77c872bf712b093645f40b80ce7127531fe6746a5b66e18ea073ab6a644934abed9bb64126fea9

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\skovmandshilsnerne.lnk

Filesize
846B

MD5
5ecded37fa31c9226e71f8f6f32b92ef

SHA1
be4532c4db6460e27f43f0cd6babb2be8b28ced5

SHA256
3b6dc1692d614cbcb1f1b5326421975794199c1a8973d1a3e7fd5530d9781ded

SHA512
160f9665c210bac46b39fff511f60ea5fae31725a1a7b0b50ed88c0daab9fb352f432351c8c9584f8f359f71dbb953440d7fd3495082fc12398a74fb21534814

Download Submit
memory/2240-49-0x0000000077961000-0x0000000077A81000-memory.dmp

Filesize
1.1MB

Download
memory/2240-52-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/2240-36-0x0000000077961000-0x0000000077A81000-memory.dmp

Filesize
1.1MB

Download
memory/2240-37-0x00000000779E8000-0x00000000779E9000-memory.dmp

Filesize
4KB

Download
memory/2240-38-0x0000000077961000-0x0000000077A81000-memory.dmp

Filesize
1.1MB

Download
memory/2240-40-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/2240-44-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/2240-48-0x0000000077961000-0x0000000077A81000-memory.dmp

Filesize
1.1MB

Download
memory/2240-61-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/2240-50-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/2240-51-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/2240-60-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/2240-53-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/2240-54-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/2240-55-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/2240-56-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/2240-57-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/2240-58-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/2240-59-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/2872-35-0x00000000745B5000-0x00000000745B6000-memory.dmp

Filesize
4KB

Download
memory/2872-34-0x0000000077961000-0x0000000077A81000-memory.dmp

Filesize
1.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads