remcos | 91baa78314206a19bf1224b895488a6241b06f856e8d98113458c17842e78540

General

Target

fc640a0cb5f5f15da905fd63b6971fe0N.exe
Size

139KB
MD5

fc640a0cb5f5f15da905fd63b6971fe0
SHA1

a86aed0b14fa70106045cb6ead2ac55821ec86a9
SHA256

91baa78314206a19bf1224b895488a6241b06f856e8d98113458c17842e78540
SHA512

10e49658858aad38aef0479530096b855de50c67baa7db1c05e2c402a67d5b3af836319b3bdac1b325154e722943f3266aa620168c05f6e326f6fbe38d92c8a9
SSDEEP

1536:ITHiPBX4nDzMyRXGHrc9YRHqbTypgpmb5Q+ZReSdhk/J+YLgD3mrxb53cSuYQjKB:xPd4n/M+WLcilrpgGH/GwY87mVmIXx

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
2776	wn2ra4ohzdr.exe
2640	wn2ra4ohzdr.exe

Loads dropped DLL 1 IoCs

pid	Process
2072	fc640a0cb5f5f15da905fd63b6971fe0N.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-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	fc640a0cb5f5f15da905fd63b6971fe0N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2776 set thread context of 2640	2776	wn2ra4ohzdr.exe	31

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	fc640a0cb5f5f15da905fd63b6971fe0N.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
2640	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2072 wrote to memory of 2776	2072	fc640a0cb5f5f15da905fd63b6971fe0N.exe	30
PID 2072 wrote to memory of 2776	2072	fc640a0cb5f5f15da905fd63b6971fe0N.exe	30
PID 2072 wrote to memory of 2776	2072	fc640a0cb5f5f15da905fd63b6971fe0N.exe	30
PID 2072 wrote to memory of 2776	2072	fc640a0cb5f5f15da905fd63b6971fe0N.exe	30
PID 2776 wrote to memory of 2640	2776	wn2ra4ohzdr.exe	31
PID 2776 wrote to memory of 2640	2776	wn2ra4ohzdr.exe	31
PID 2776 wrote to memory of 2640	2776	wn2ra4ohzdr.exe	31
PID 2776 wrote to memory of 2640	2776	wn2ra4ohzdr.exe	31
PID 2776 wrote to memory of 2640	2776	wn2ra4ohzdr.exe	31
PID 2776 wrote to memory of 2640	2776	wn2ra4ohzdr.exe	31
PID 2776 wrote to memory of 2640	2776	wn2ra4ohzdr.exe	31
PID 2776 wrote to memory of 2640	2776	wn2ra4ohzdr.exe	31
PID 2776 wrote to memory of 2640	2776	wn2ra4ohzdr.exe	31
PID 2776 wrote to memory of 2640	2776	wn2ra4ohzdr.exe	31

C:\Users\Admin\AppData\Local\Temp\fc640a0cb5f5f15da905fd63b6971fe0N.exe
"C:\Users\Admin\AppData\Local\Temp\fc640a0cb5f5f15da905fd63b6971fe0N.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2072
- 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:2776
- - 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:2640

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
139KB

MD5
bb6e785ae3a19783b2afa8c888705625

SHA1
157283d2673ffee40f6032241bd664eb2d2f8210

SHA256
a93e6a54c77d5aeeebc7d548ccfe0cb9f6fdcec28694ce9a8dbc25e1af2651b4

SHA512
a4f0e5fa1af39febc54d139a3ebb3ef424a17b404c62e5e3f72c37fe26f0f51943b4c501466b0ba4ca59e5e8530dfb56494c906478dc13467c4647fda4a8069c

Download Submit
memory/2072-14-0x0000000074350000-0x0000000074A3E000-memory.dmp

Filesize
6.9MB

Download
memory/2072-1-0x0000000000D60000-0x0000000000D88000-memory.dmp

Filesize
160KB

Download
memory/2072-2-0x0000000074350000-0x0000000074A3E000-memory.dmp

Filesize
6.9MB

Download
memory/2072-3-0x00000000003E0000-0x0000000000400000-memory.dmp

Filesize
128KB

Download
memory/2072-6-0x000000007435E000-0x000000007435F000-memory.dmp

Filesize
4KB

Download
memory/2072-0-0x000000007435E000-0x000000007435F000-memory.dmp

Filesize
4KB

Download
memory/2640-19-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2640-28-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2640-43-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2640-36-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2640-21-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2640-17-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2640-29-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2640-35-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2640-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2640-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2640-34-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2776-15-0x0000000074350000-0x0000000074A3E000-memory.dmp

Filesize
6.9MB

Download
memory/2776-13-0x0000000000FE0000-0x0000000001008000-memory.dmp

Filesize
160KB

Download
memory/2776-39-0x0000000074350000-0x0000000074A3E000-memory.dmp

Filesize
6.9MB

Download
memory/2776-40-0x0000000074350000-0x0000000074A3E000-memory.dmp

Filesize
6.9MB

Download
memory/2776-16-0x0000000074350000-0x0000000074A3E000-memory.dmp

Filesize
6.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads