remcos | 99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8

General

Target

99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe
Size

934KB
MD5

9bd821ba65b89710d2d81c7a7b98ab5d
SHA1

cbdc6446729b60601f7c288bc063cd9cc216f925
SHA256

99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8
SHA512

30ad861b9015a201cec5e6a88ce6cba3e03459f1c709ef50c89505de96e5760e7c1647dc8382751fffc3c9ed843b539114b52051e8d564c6fde7fad08436c5a4
SSDEEP

24576:xcCEmyVj6jI43L84UytM00todtTQxRjU/oe:xcCRI6jIepUy+ZtmdGR

Score

10^/10

remcos xp persistence rat

Malware Config

Extracted

Family

remcos

Botnet

XP

C2

xpremcuz300622.ddns.net:3542

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
oos.exe
delete_file
false
hide_file
true
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
Remcos-MMP2I7
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
kkl
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

Processes:

oos.exeoos.exe

pid process

2928 oos.exe
1864 oos.exe

pid	process
2928	oos.exe
1864	oos.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exeWScript.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	WScript.exe

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exeoos.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows\CurrentVersion\Run\	oos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	oos.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	oos.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	oos.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows\CurrentVersion\Run\	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exeoos.exe

description	pid	process	target process
PID 2196 set thread context of 3752	2196	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe
PID 2928 set thread context of 1864	2928	oos.exe	oos.exe

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

Processes:

99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000_Classes\Local Settings	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe

pid	process
2196	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe
2196	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe

description pid process

Token: SeDebugPrivilege 2196 99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

oos.exe

pid process

1864 oos.exe

description	pid	process
Token: SeDebugPrivilege	2196	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe

pid	process
1864	oos.exe

Suspicious use of WriteProcessMemory 36 IoCs

Processes:

99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exeWScript.execmd.exeoos.exe

description	pid	process	target process
PID 2196 wrote to memory of 2188	2196	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe
PID 2196 wrote to memory of 2188	2196	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe
PID 2196 wrote to memory of 2188	2196	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe
PID 2196 wrote to memory of 3752	2196	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe
PID 2196 wrote to memory of 3752	2196	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe
PID 2196 wrote to memory of 3752	2196	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe
PID 2196 wrote to memory of 3752	2196	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe
PID 2196 wrote to memory of 3752	2196	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe
PID 2196 wrote to memory of 3752	2196	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe
PID 2196 wrote to memory of 3752	2196	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe
PID 2196 wrote to memory of 3752	2196	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe
PID 2196 wrote to memory of 3752	2196	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe
PID 2196 wrote to memory of 3752	2196	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe
PID 2196 wrote to memory of 3752	2196	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe
PID 2196 wrote to memory of 3752	2196	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe
PID 3752 wrote to memory of 4380	3752	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe	WScript.exe
PID 3752 wrote to memory of 4380	3752	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe	WScript.exe
PID 3752 wrote to memory of 4380	3752	99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe	WScript.exe
PID 4380 wrote to memory of 5036	4380	WScript.exe	cmd.exe
PID 4380 wrote to memory of 5036	4380	WScript.exe	cmd.exe
PID 4380 wrote to memory of 5036	4380	WScript.exe	cmd.exe
PID 5036 wrote to memory of 2928	5036	cmd.exe	oos.exe
PID 5036 wrote to memory of 2928	5036	cmd.exe	oos.exe
PID 5036 wrote to memory of 2928	5036	cmd.exe	oos.exe
PID 2928 wrote to memory of 1864	2928	oos.exe	oos.exe
PID 2928 wrote to memory of 1864	2928	oos.exe	oos.exe
PID 2928 wrote to memory of 1864	2928	oos.exe	oos.exe
PID 2928 wrote to memory of 1864	2928	oos.exe	oos.exe
PID 2928 wrote to memory of 1864	2928	oos.exe	oos.exe
PID 2928 wrote to memory of 1864	2928	oos.exe	oos.exe
PID 2928 wrote to memory of 1864	2928	oos.exe	oos.exe
PID 2928 wrote to memory of 1864	2928	oos.exe	oos.exe
PID 2928 wrote to memory of 1864	2928	oos.exe	oos.exe
PID 2928 wrote to memory of 1864	2928	oos.exe	oos.exe
PID 2928 wrote to memory of 1864	2928	oos.exe	oos.exe
PID 2928 wrote to memory of 1864	2928	oos.exe	oos.exe

C:\Users\Admin\AppData\Local\Temp\99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe
"C:\Users\Admin\AppData\Local\Temp\99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2196

C:\Users\Admin\AppData\Local\Temp\99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe
"C:\Users\Admin\AppData\Local\Temp\99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe"
2⤵
PID:2188

C:\Users\Admin\AppData\Local\Temp\99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe
"C:\Users\Admin\AppData\Local\Temp\99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8.exe"
2⤵
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:3752

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
3⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4380

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\oos.exe"
4⤵
- Suspicious use of WriteProcessMemory
PID:5036

C:\Users\Admin\AppData\Roaming\oos.exe
C:\Users\Admin\AppData\Roaming\oos.exe
5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2928

C:\Users\Admin\AppData\Roaming\oos.exe
"C:\Users\Admin\AppData\Roaming\oos.exe"
6⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetWindowsHookEx
PID:1864

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\install.vbs
Filesize
398B

MD5
a5d3440f90cbfae712166e20870eaed7

SHA1
cc1e1a2945eb2ad475234344f7527ad9e9873647

SHA256
960a570da95b8d16809cbcc18e8ca4d81e16cb666354ddc1d572daf93f291f02

SHA512
d3136a280fbb326ccc5cb5ab1214aed8ccd6baa7f3f89ef9e0b5bf391a957dab2c121640bb056e6cbda0594f83133c4dbb4e1e2f0e290b44a401cd2cf8cfd4aa

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
934KB

MD5
9bd821ba65b89710d2d81c7a7b98ab5d

SHA1
cbdc6446729b60601f7c288bc063cd9cc216f925

SHA256
99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8

SHA512
30ad861b9015a201cec5e6a88ce6cba3e03459f1c709ef50c89505de96e5760e7c1647dc8382751fffc3c9ed843b539114b52051e8d564c6fde7fad08436c5a4

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
934KB

MD5
9bd821ba65b89710d2d81c7a7b98ab5d

SHA1
cbdc6446729b60601f7c288bc063cd9cc216f925

SHA256
99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8

SHA512
30ad861b9015a201cec5e6a88ce6cba3e03459f1c709ef50c89505de96e5760e7c1647dc8382751fffc3c9ed843b539114b52051e8d564c6fde7fad08436c5a4

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
934KB

MD5
9bd821ba65b89710d2d81c7a7b98ab5d

SHA1
cbdc6446729b60601f7c288bc063cd9cc216f925

SHA256
99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8

SHA512
30ad861b9015a201cec5e6a88ce6cba3e03459f1c709ef50c89505de96e5760e7c1647dc8382751fffc3c9ed843b539114b52051e8d564c6fde7fad08436c5a4

Download Submit
memory/1864-150-0x0000000000000000-mapping.dmp

Download
memory/1864-156-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1864-155-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1864-154-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1864-153-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2188-137-0x0000000000000000-mapping.dmp

Download
memory/2196-132-0x0000000000BE0000-0x0000000000CD0000-memory.dmp

Filesize
960KB

Download
memory/2196-136-0x0000000009300000-0x000000000939C000-memory.dmp

Filesize
624KB

Download
memory/2196-135-0x0000000005670000-0x000000000567A000-memory.dmp

Filesize
40KB

Download
memory/2196-134-0x00000000056C0000-0x0000000005752000-memory.dmp

Filesize
584KB

Download
memory/2196-133-0x0000000005C70000-0x0000000006214000-memory.dmp

Filesize
5.6MB

Download
memory/2928-147-0x0000000000000000-mapping.dmp

Download
memory/3752-138-0x0000000000000000-mapping.dmp

Download
memory/3752-144-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3752-142-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3752-141-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3752-140-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3752-139-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4380-143-0x0000000000000000-mapping.dmp

Download
memory/5036-146-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads