remcos | 3962ae9db78b08a86e6907b321a399ca5a83abf3032ef68c16637f840e8992a8

General

Target

tmp.exe
Size

1002KB
MD5

f46d06135ec1f3705b556f830f1de372
SHA1

a1d4c48f24a72ce044faf64ebabfc94c3ac5999b
SHA256

3962ae9db78b08a86e6907b321a399ca5a83abf3032ef68c16637f840e8992a8
SHA512

c1e1a5e6f3bc6b0f704eb715ccb8e0f6afea94c04c7ac1bf634b336142d05db3fb30ca9d9c7da15fa853c89ce698981f49e9bd54ea7d81fc101e53f7ff788939
SSDEEP

24576:bzl6TpeiKfQZiErxfQ92nZyvsW6kScfH2/ABRVb+2eVV:bM1vhxc2wvF6kvf2/kjBeVV

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

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:

tmp.exeWScript.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\Control Panel\International\Geo\Nation	tmp.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 2 IoCs

Processes:

oos.exeoos.exe

pid process

1568 oos.exe
4524 oos.exe

pid	process
1568	oos.exe
4524	oos.exe

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

oos.exetmp.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\Software\Microsoft\Windows\CurrentVersion\Run\	oos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\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-1-5-21-2805025096-2326403612-4231045514-1000\Software\Microsoft\Windows\CurrentVersion\Run\	tmp.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	tmp.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	tmp.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	tmp.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

tmp.exeoos.exe

description pid process target process

PID 1996 set thread context of 3000 1996 tmp.exe tmp.exe
PID 1568 set thread context of 4524 1568 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:

tmp.exe

description ioc process

Key created \REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000_Classes\Local Settings tmp.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

oos.exe

pid process

4524 oos.exe

description	pid	process	target process
PID 1996 set thread context of 3000	1996	tmp.exe	tmp.exe
PID 1568 set thread context of 4524	1568	oos.exe	oos.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000_Classes\Local Settings	tmp.exe

pid	process
4524	oos.exe

Suspicious use of WriteProcessMemory 33 IoCs

Processes:

tmp.exetmp.exeWScript.execmd.exeoos.exe

description	pid	process	target process
PID 1996 wrote to memory of 3000	1996	tmp.exe	tmp.exe
PID 1996 wrote to memory of 3000	1996	tmp.exe	tmp.exe
PID 1996 wrote to memory of 3000	1996	tmp.exe	tmp.exe
PID 1996 wrote to memory of 3000	1996	tmp.exe	tmp.exe
PID 1996 wrote to memory of 3000	1996	tmp.exe	tmp.exe
PID 1996 wrote to memory of 3000	1996	tmp.exe	tmp.exe
PID 1996 wrote to memory of 3000	1996	tmp.exe	tmp.exe
PID 1996 wrote to memory of 3000	1996	tmp.exe	tmp.exe
PID 1996 wrote to memory of 3000	1996	tmp.exe	tmp.exe
PID 1996 wrote to memory of 3000	1996	tmp.exe	tmp.exe
PID 1996 wrote to memory of 3000	1996	tmp.exe	tmp.exe
PID 1996 wrote to memory of 3000	1996	tmp.exe	tmp.exe
PID 3000 wrote to memory of 5008	3000	tmp.exe	WScript.exe
PID 3000 wrote to memory of 5008	3000	tmp.exe	WScript.exe
PID 3000 wrote to memory of 5008	3000	tmp.exe	WScript.exe
PID 5008 wrote to memory of 4988	5008	WScript.exe	cmd.exe
PID 5008 wrote to memory of 4988	5008	WScript.exe	cmd.exe
PID 5008 wrote to memory of 4988	5008	WScript.exe	cmd.exe
PID 4988 wrote to memory of 1568	4988	cmd.exe	oos.exe
PID 4988 wrote to memory of 1568	4988	cmd.exe	oos.exe
PID 4988 wrote to memory of 1568	4988	cmd.exe	oos.exe
PID 1568 wrote to memory of 4524	1568	oos.exe	oos.exe
PID 1568 wrote to memory of 4524	1568	oos.exe	oos.exe
PID 1568 wrote to memory of 4524	1568	oos.exe	oos.exe
PID 1568 wrote to memory of 4524	1568	oos.exe	oos.exe
PID 1568 wrote to memory of 4524	1568	oos.exe	oos.exe
PID 1568 wrote to memory of 4524	1568	oos.exe	oos.exe
PID 1568 wrote to memory of 4524	1568	oos.exe	oos.exe
PID 1568 wrote to memory of 4524	1568	oos.exe	oos.exe
PID 1568 wrote to memory of 4524	1568	oos.exe	oos.exe
PID 1568 wrote to memory of 4524	1568	oos.exe	oos.exe
PID 1568 wrote to memory of 4524	1568	oos.exe	oos.exe
PID 1568 wrote to memory of 4524	1568	oos.exe	oos.exe

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1996

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
2⤵
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:3000

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:5008

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\oos.exe"
4⤵
- Suspicious use of WriteProcessMemory
PID:4988

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:1568

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:4524

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:\ProgramData\remcos\logs.dat
Filesize
144B

MD5
56934af976b31836147cf73caa978032

SHA1
9106ca309c4fc41b61a813412490d234e09d89bf

SHA256
54119c2e7fedf070bc15025428ee4a549be22217759916354995166b2bd9b51f

SHA512
898e5ad5eb5580f0239c9de68309b460403c879b02eb8b520019d8d0901fc627cbe1d8303bb9703d0dcdeffd1bd7bcb315a6bee6ccbc1ab4f0531a9f512c4cf4

Download Submit
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
1002KB

MD5
f46d06135ec1f3705b556f830f1de372

SHA1
a1d4c48f24a72ce044faf64ebabfc94c3ac5999b

SHA256
3962ae9db78b08a86e6907b321a399ca5a83abf3032ef68c16637f840e8992a8

SHA512
c1e1a5e6f3bc6b0f704eb715ccb8e0f6afea94c04c7ac1bf634b336142d05db3fb30ca9d9c7da15fa853c89ce698981f49e9bd54ea7d81fc101e53f7ff788939

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
1002KB

MD5
f46d06135ec1f3705b556f830f1de372

SHA1
a1d4c48f24a72ce044faf64ebabfc94c3ac5999b

SHA256
3962ae9db78b08a86e6907b321a399ca5a83abf3032ef68c16637f840e8992a8

SHA512
c1e1a5e6f3bc6b0f704eb715ccb8e0f6afea94c04c7ac1bf634b336142d05db3fb30ca9d9c7da15fa853c89ce698981f49e9bd54ea7d81fc101e53f7ff788939

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
1002KB

MD5
f46d06135ec1f3705b556f830f1de372

SHA1
a1d4c48f24a72ce044faf64ebabfc94c3ac5999b

SHA256
3962ae9db78b08a86e6907b321a399ca5a83abf3032ef68c16637f840e8992a8

SHA512
c1e1a5e6f3bc6b0f704eb715ccb8e0f6afea94c04c7ac1bf634b336142d05db3fb30ca9d9c7da15fa853c89ce698981f49e9bd54ea7d81fc101e53f7ff788939

Download Submit
memory/1568-156-0x0000000005940000-0x0000000005950000-memory.dmp

Filesize
64KB

Download
memory/1568-157-0x0000000005940000-0x0000000005950000-memory.dmp

Filesize
64KB

Download
memory/1996-136-0x0000000004AC0000-0x0000000004AD0000-memory.dmp

Filesize
64KB

Download
memory/1996-133-0x0000000000030000-0x0000000000130000-memory.dmp

Filesize
1024KB

Download
memory/1996-140-0x0000000007740000-0x00000000077DC000-memory.dmp

Filesize
624KB

Download
memory/1996-139-0x0000000004AC0000-0x0000000004AD0000-memory.dmp

Filesize
64KB

Download
memory/1996-138-0x0000000005E50000-0x0000000005FF6000-memory.dmp

Filesize
1.6MB

Download
memory/1996-137-0x0000000004AF0000-0x0000000004AFA000-memory.dmp

Filesize
40KB

Download
memory/1996-135-0x0000000004B20000-0x0000000004BB2000-memory.dmp

Filesize
584KB

Download
memory/1996-134-0x0000000004FF0000-0x0000000005594000-memory.dmp

Filesize
5.6MB

Download
memory/3000-141-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3000-151-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3000-148-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3000-142-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3000-144-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4524-167-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4524-170-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4524-165-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4524-166-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4524-162-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4524-168-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4524-169-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4524-163-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4524-174-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4524-175-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4524-177-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4524-161-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4524-183-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4524-184-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads