remcos | 78d52705c5cff9aab7bee41c74a1fbdb6ba8987f0792b9d4502e432e359aa43b

General

Target

78d52705c5cff9aab7bee41c74a1fbdb6ba8987f0792b9d4502e432e359aa43b.exe
Size

140KB
MD5

01d1968019e98d917566aa2d3630ccfd
SHA1

a0afbccec6370e4f27cf94d14410c7228453065d
SHA256

78d52705c5cff9aab7bee41c74a1fbdb6ba8987f0792b9d4502e432e359aa43b
SHA512

bacc26d1d0fe294c5d12c30062bf952b6ad1b898c483ab125fbdda5d6e42bda5a849682619a9ad1bb980dd3eb42160b4d421390ee482b92bfdc801d2ac6fcc74
SSDEEP

3072:xPd4n/M+WLcilrpgGH/GwY87mVmIXhIHVSp:xP6/M+WLckOBhVmIYu

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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	78d52705c5cff9aab7bee41c74a1fbdb6ba8987f0792b9d4502e432e359aa43b.exe

Executes dropped EXE 2 IoCs

pid	Process
736	wn2ra4ohzdr.exe
4776	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-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	78d52705c5cff9aab7bee41c74a1fbdb6ba8987f0792b9d4502e432e359aa43b.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 736 set thread context of 4776	736	wn2ra4ohzdr.exe	97

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	wn2ra4ohzdr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	78d52705c5cff9aab7bee41c74a1fbdb6ba8987f0792b9d4502e432e359aa43b.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wn2ra4ohzdr.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4776	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3716 wrote to memory of 736	3716	78d52705c5cff9aab7bee41c74a1fbdb6ba8987f0792b9d4502e432e359aa43b.exe	90
PID 3716 wrote to memory of 736	3716	78d52705c5cff9aab7bee41c74a1fbdb6ba8987f0792b9d4502e432e359aa43b.exe	90
PID 3716 wrote to memory of 736	3716	78d52705c5cff9aab7bee41c74a1fbdb6ba8987f0792b9d4502e432e359aa43b.exe	90
PID 736 wrote to memory of 4776	736	wn2ra4ohzdr.exe	97
PID 736 wrote to memory of 4776	736	wn2ra4ohzdr.exe	97
PID 736 wrote to memory of 4776	736	wn2ra4ohzdr.exe	97
PID 736 wrote to memory of 4776	736	wn2ra4ohzdr.exe	97
PID 736 wrote to memory of 4776	736	wn2ra4ohzdr.exe	97
PID 736 wrote to memory of 4776	736	wn2ra4ohzdr.exe	97
PID 736 wrote to memory of 4776	736	wn2ra4ohzdr.exe	97
PID 736 wrote to memory of 4776	736	wn2ra4ohzdr.exe	97
PID 736 wrote to memory of 4776	736	wn2ra4ohzdr.exe	97

C:\Users\Admin\AppData\Local\Temp\78d52705c5cff9aab7bee41c74a1fbdb6ba8987f0792b9d4502e432e359aa43b.exe
"C:\Users\Admin\AppData\Local\Temp\78d52705c5cff9aab7bee41c74a1fbdb6ba8987f0792b9d4502e432e359aa43b.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3716
- 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:736
- - 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:4776

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

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Downloads

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

Filesize
140KB

MD5
bacde1588d79635b5ab81e861fb43d64

SHA1
7f10e1ab908a708f5d0fd8c7d1578c16283dbd2d

SHA256
cdd5e3c16d59bdf31ea9d4923fcb87d0025fe64db469407102d680572aba1b02

SHA512
b6d3dc5bb238b9202ef96beed8893d9cf58e5f0b07cdf1695d85f0c652f8c6311962d49ad530f515b4ee0321d02fb32ea6b423c2060d77633044495fbbf5dc60

Download Submit
memory/736-35-0x0000000074560000-0x0000000074D10000-memory.dmp

Filesize
7.7MB

Download
memory/736-33-0x0000000074560000-0x0000000074D10000-memory.dmp

Filesize
7.7MB

Download
memory/736-22-0x0000000074560000-0x0000000074D10000-memory.dmp

Filesize
7.7MB

Download
memory/736-21-0x0000000074560000-0x0000000074D10000-memory.dmp

Filesize
7.7MB

Download
memory/3716-4-0x0000000074560000-0x0000000074D10000-memory.dmp

Filesize
7.7MB

Download
memory/3716-2-0x0000000005B90000-0x0000000006134000-memory.dmp

Filesize
5.6MB

Download
memory/3716-5-0x00000000055E0000-0x00000000055EA000-memory.dmp

Filesize
40KB

Download
memory/3716-0-0x000000007456E000-0x000000007456F000-memory.dmp

Filesize
4KB

Download
memory/3716-20-0x0000000074560000-0x0000000074D10000-memory.dmp

Filesize
7.7MB

Download
memory/3716-3-0x0000000005510000-0x00000000055A2000-memory.dmp

Filesize
584KB

Download
memory/3716-1-0x0000000000B10000-0x0000000000B38000-memory.dmp

Filesize
160KB

Download
memory/3716-6-0x0000000005670000-0x0000000005690000-memory.dmp

Filesize
128KB

Download
memory/4776-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4776-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4776-29-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4776-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4776-23-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4776-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads