remcos | ab1863097df61e6f421971762e3dbc8773fc3cf6dc62e120ce4e105270fd5d3c

General

Target

f106558563ef13a879cc15f3625fbfe0N.exe
Size

140KB
MD5

f106558563ef13a879cc15f3625fbfe0
SHA1

e45a0531db955a1dd1befcf0a9f849c82704bdbe
SHA256

ab1863097df61e6f421971762e3dbc8773fc3cf6dc62e120ce4e105270fd5d3c
SHA512

1c67e65078e237b61b4ef720d28c2227849b469d849670b1f10f03d49b28c0c9f5734a3adba498a54efc22e11811075af5b6577a1f2770901d1ba8ad05dce114
SSDEEP

3072:xPd4n/M+WLcilrpgGH/GwY87mVmIXhIHb+a:xP6/M+WLckOBhVmI0+a

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

Executes dropped EXE 2 IoCs

pid	Process
1012	wn2ra4ohzdr.exe
2160	wn2ra4ohzdr.exe

Loads dropped DLL 1 IoCs

pid	Process
1908	f106558563ef13a879cc15f3625fbfe0N.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-1-5-21-2172136094-3310281978-782691160-1000\Software\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	f106558563ef13a879cc15f3625fbfe0N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1012 set thread context of 2160	1012	wn2ra4ohzdr.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 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	f106558563ef13a879cc15f3625fbfe0N.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
2160	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1908 wrote to memory of 1012	1908	f106558563ef13a879cc15f3625fbfe0N.exe	29
PID 1908 wrote to memory of 1012	1908	f106558563ef13a879cc15f3625fbfe0N.exe	29
PID 1908 wrote to memory of 1012	1908	f106558563ef13a879cc15f3625fbfe0N.exe	29
PID 1908 wrote to memory of 1012	1908	f106558563ef13a879cc15f3625fbfe0N.exe	29
PID 1012 wrote to memory of 2160	1012	wn2ra4ohzdr.exe	30
PID 1012 wrote to memory of 2160	1012	wn2ra4ohzdr.exe	30
PID 1012 wrote to memory of 2160	1012	wn2ra4ohzdr.exe	30
PID 1012 wrote to memory of 2160	1012	wn2ra4ohzdr.exe	30
PID 1012 wrote to memory of 2160	1012	wn2ra4ohzdr.exe	30
PID 1012 wrote to memory of 2160	1012	wn2ra4ohzdr.exe	30
PID 1012 wrote to memory of 2160	1012	wn2ra4ohzdr.exe	30
PID 1012 wrote to memory of 2160	1012	wn2ra4ohzdr.exe	30
PID 1012 wrote to memory of 2160	1012	wn2ra4ohzdr.exe	30
PID 1012 wrote to memory of 2160	1012	wn2ra4ohzdr.exe	30

C:\Users\Admin\AppData\Local\Temp\f106558563ef13a879cc15f3625fbfe0N.exe
"C:\Users\Admin\AppData\Local\Temp\f106558563ef13a879cc15f3625fbfe0N.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1908
- 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:1012
- - 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:2160

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

\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe

Filesize
140KB

MD5
5de5c07dce4c7ba6e789ca61a5330473

SHA1
ecae5c177a651b5b65bd9240cdff58638ab9b43d

SHA256
a2f613a2c5a6f79e4ea18cd60d98de3d13d64503e0868f4248d6682320435bf9

SHA512
fb907e637cfbcd7ec0326dee557988376a92f7a328945a92a7e4dfd72d45e0e9c4dba9a86ffd7479f38354a125b7a2cfac9c0cf8abaf7c062a5407ab3c2f36b4

Download Submit
memory/1012-34-0x00000000748A0000-0x0000000074F8E000-memory.dmp

Filesize
6.9MB

Download
memory/1012-13-0x00000000748A0000-0x0000000074F8E000-memory.dmp

Filesize
6.9MB

Download
memory/1012-15-0x00000000001D0000-0x00000000001F8000-memory.dmp

Filesize
160KB

Download
memory/1012-16-0x00000000748A0000-0x0000000074F8E000-memory.dmp

Filesize
6.9MB

Download
memory/1012-35-0x00000000748A0000-0x0000000074F8E000-memory.dmp

Filesize
6.9MB

Download
memory/1908-1-0x00000000009C0000-0x00000000009E8000-memory.dmp

Filesize
160KB

Download
memory/1908-2-0x00000000748A0000-0x0000000074F8E000-memory.dmp

Filesize
6.9MB

Download
memory/1908-3-0x0000000000650000-0x0000000000670000-memory.dmp

Filesize
128KB

Download
memory/1908-12-0x00000000748AE000-0x00000000748AF000-memory.dmp

Filesize
4KB

Download
memory/1908-14-0x00000000748A0000-0x0000000074F8E000-memory.dmp

Filesize
6.9MB

Download
memory/1908-0-0x00000000748AE000-0x00000000748AF000-memory.dmp

Filesize
4KB

Download
memory/2160-19-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2160-23-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2160-21-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2160-18-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2160-17-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2160-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2160-31-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2160-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2160-26-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads