remcos | 3fa0a1d295887bbf530fdec6ba6ad140b8a185507a630fdb12bff7f0cdf355ae

Analysis

max time kernel
149s
max time network
149s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
14-02-2023 14:18

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General

Target

Revised Purchase Order.exe
Size

534KB
MD5

7a904d47ee91783b4ff379093ddb333b
SHA1

a2d467355cc2933b1986eba160420ac38997a5f6
SHA256

3fa0a1d295887bbf530fdec6ba6ad140b8a185507a630fdb12bff7f0cdf355ae
SHA512

e64483cf8a9e5940d9274ee1f580852f4b6c85d25395a81a5c8169d6a2326ece4f3f45bcd6a98c4c59658b8b6b8d9f495016c4b98049f35e9a27b75a85b3e5c5
SSDEEP

12288:X3D1eItkatK3CYLfTVJiqubs5X1SVE8kJ4Km1BQ1jcLP:5BlYSYLBJiPbsSRkJ4KmfwQP

Score

10^/10

remcos ramsuup persistence rat

Malware Config

Extracted

Family

remcos

Botnet

ramsuup

194.147.140.197:34574

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
ramsuup.exe
copy_folder
ramsuup
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
true
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-HFU2GV
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
ramsuup
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
652	ramsuup.exe
1156	ramsuup.exe

Loads dropped DLL 1 IoCs

pid	Process
1096	Revised Purchase Order.exe

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\	ramsuup.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\ramsuup = "\"C:\\Users\\Admin\\AppData\\Roaming\\ramsuup\\ramsuup.exe\""	ramsuup.exe
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\	ramsuup.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\ramsuup = "\"C:\\Users\\Admin\\AppData\\Roaming\\ramsuup\\ramsuup.exe\""	ramsuup.exe
Key created	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\	Revised Purchase Order.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\ramsuup = "\"C:\\Users\\Admin\\AppData\\Roaming\\ramsuup\\ramsuup.exe\""	Revised Purchase Order.exe
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\	Revised Purchase Order.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\ramsuup = "\"C:\\Users\\Admin\\AppData\\Roaming\\ramsuup\\ramsuup.exe\""	Revised Purchase Order.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1228 set thread context of 1096	1228	Revised Purchase Order.exe	28
PID 652 set thread context of 1156	652	ramsuup.exe	30

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1156	ramsuup.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1228 wrote to memory of 1096	1228	Revised Purchase Order.exe	28
PID 1228 wrote to memory of 1096	1228	Revised Purchase Order.exe	28
PID 1228 wrote to memory of 1096	1228	Revised Purchase Order.exe	28
PID 1228 wrote to memory of 1096	1228	Revised Purchase Order.exe	28
PID 1228 wrote to memory of 1096	1228	Revised Purchase Order.exe	28
PID 1228 wrote to memory of 1096	1228	Revised Purchase Order.exe	28
PID 1228 wrote to memory of 1096	1228	Revised Purchase Order.exe	28
PID 1228 wrote to memory of 1096	1228	Revised Purchase Order.exe	28
PID 1228 wrote to memory of 1096	1228	Revised Purchase Order.exe	28
PID 1228 wrote to memory of 1096	1228	Revised Purchase Order.exe	28
PID 1228 wrote to memory of 1096	1228	Revised Purchase Order.exe	28
PID 1228 wrote to memory of 1096	1228	Revised Purchase Order.exe	28
PID 1228 wrote to memory of 1096	1228	Revised Purchase Order.exe	28
PID 1096 wrote to memory of 652	1096	Revised Purchase Order.exe	29
PID 1096 wrote to memory of 652	1096	Revised Purchase Order.exe	29
PID 1096 wrote to memory of 652	1096	Revised Purchase Order.exe	29
PID 1096 wrote to memory of 652	1096	Revised Purchase Order.exe	29
PID 652 wrote to memory of 1156	652	ramsuup.exe	30
PID 652 wrote to memory of 1156	652	ramsuup.exe	30
PID 652 wrote to memory of 1156	652	ramsuup.exe	30
PID 652 wrote to memory of 1156	652	ramsuup.exe	30
PID 652 wrote to memory of 1156	652	ramsuup.exe	30
PID 652 wrote to memory of 1156	652	ramsuup.exe	30
PID 652 wrote to memory of 1156	652	ramsuup.exe	30
PID 652 wrote to memory of 1156	652	ramsuup.exe	30
PID 652 wrote to memory of 1156	652	ramsuup.exe	30
PID 652 wrote to memory of 1156	652	ramsuup.exe	30
PID 652 wrote to memory of 1156	652	ramsuup.exe	30
PID 652 wrote to memory of 1156	652	ramsuup.exe	30
PID 652 wrote to memory of 1156	652	ramsuup.exe	30

C:\Users\Admin\AppData\Local\Temp\Revised Purchase Order.exe
"C:\Users\Admin\AppData\Local\Temp\Revised Purchase Order.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1228
- C:\Users\Admin\AppData\Local\Temp\Revised Purchase Order.exe
  "C:\Users\Admin\AppData\Local\Temp\Revised Purchase Order.exe"
  2⤵
  - Loads dropped DLL
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:1096
- - C:\Users\Admin\AppData\Roaming\ramsuup\ramsuup.exe
    "C:\Users\Admin\AppData\Roaming\ramsuup\ramsuup.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:652
  - - C:\Users\Admin\AppData\Roaming\ramsuup\ramsuup.exe
      "C:\Users\Admin\AppData\Roaming\ramsuup\ramsuup.exe"
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Suspicious use of SetWindowsHookEx
      PID:1156

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\ramsuup\ramsuup.exe

Filesize
534KB

MD5
7a904d47ee91783b4ff379093ddb333b

SHA1
a2d467355cc2933b1986eba160420ac38997a5f6

SHA256
3fa0a1d295887bbf530fdec6ba6ad140b8a185507a630fdb12bff7f0cdf355ae

SHA512
e64483cf8a9e5940d9274ee1f580852f4b6c85d25395a81a5c8169d6a2326ece4f3f45bcd6a98c4c59658b8b6b8d9f495016c4b98049f35e9a27b75a85b3e5c5

Download Submit
C:\Users\Admin\AppData\Roaming\ramsuup\ramsuup.exe

Filesize
534KB

MD5
7a904d47ee91783b4ff379093ddb333b

SHA1
a2d467355cc2933b1986eba160420ac38997a5f6

SHA256
3fa0a1d295887bbf530fdec6ba6ad140b8a185507a630fdb12bff7f0cdf355ae

SHA512
e64483cf8a9e5940d9274ee1f580852f4b6c85d25395a81a5c8169d6a2326ece4f3f45bcd6a98c4c59658b8b6b8d9f495016c4b98049f35e9a27b75a85b3e5c5

Download Submit
C:\Users\Admin\AppData\Roaming\ramsuup\ramsuup.exe

Filesize
534KB

MD5
7a904d47ee91783b4ff379093ddb333b

SHA1
a2d467355cc2933b1986eba160420ac38997a5f6

SHA256
3fa0a1d295887bbf530fdec6ba6ad140b8a185507a630fdb12bff7f0cdf355ae

SHA512
e64483cf8a9e5940d9274ee1f580852f4b6c85d25395a81a5c8169d6a2326ece4f3f45bcd6a98c4c59658b8b6b8d9f495016c4b98049f35e9a27b75a85b3e5c5

Download Submit
\Users\Admin\AppData\Roaming\ramsuup\ramsuup.exe

Filesize
534KB

MD5
7a904d47ee91783b4ff379093ddb333b

SHA1
a2d467355cc2933b1986eba160420ac38997a5f6

SHA256
3fa0a1d295887bbf530fdec6ba6ad140b8a185507a630fdb12bff7f0cdf355ae

SHA512
e64483cf8a9e5940d9274ee1f580852f4b6c85d25395a81a5c8169d6a2326ece4f3f45bcd6a98c4c59658b8b6b8d9f495016c4b98049f35e9a27b75a85b3e5c5

Download Submit
memory/652-77-0x0000000000EE0000-0x0000000000F6C000-memory.dmp

Filesize
560KB

Download
memory/1096-61-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1096-60-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1096-65-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1096-67-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1096-70-0x0000000075531000-0x0000000075533000-memory.dmp

Filesize
8KB

Download
memory/1096-71-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1096-62-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1096-55-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1096-63-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1096-76-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1096-58-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1096-56-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1156-98-0x0000000000080000-0x0000000000100000-memory.dmp

Filesize
512KB

Download
memory/1156-104-0x0000000000080000-0x0000000000100000-memory.dmp

Filesize
512KB

Download
memory/1228-54-0x0000000000D20000-0x0000000000DAC000-memory.dmp

Filesize
560KB

Download