remcos | e96aed97b899d7cfc37b229f045f6b87623f9abd97b15256fa6322685cb2c5f0

General

Target

Arrival notice.exe
Size

933KB
MD5

cd4bacd0528a0f7efdea9be27414c6e7
SHA1

fd92ca627cc15e4ed350478fa5aa575ef39adacf
SHA256

e96aed97b899d7cfc37b229f045f6b87623f9abd97b15256fa6322685cb2c5f0
SHA512

bd7c3e1a86bc2eeb21105a308ceaa94b9b930d9c179b255d1563491f6dfad010f3efcf3796d25a110769f54484aae9a8f0224f7d6788007a4651c7d70beef37a
SSDEEP

12288:I4stXCxGE7FyfV3RuK7EmImLu6krd2ks1v2bZ4OQN2EjWPPtiUQ+8+t5pX5PO9PD:IBtXkGEiVMcENmL1aeOQDoi+pX5eoHw

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:

Arrival notice.exeWScript.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4238149048-355649189-894321705-1000\Control Panel\International\Geo\Nation	Arrival notice.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4238149048-355649189-894321705-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 2 IoCs

Processes:

oos.exeoos.exe

pid process

3560 oos.exe
2552 oos.exe

pid	process
3560	oos.exe
2552	oos.exe

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

Arrival notice.exeoos.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	Arrival notice.exe
Key created	\REGISTRY\USER\S-1-5-21-4238149048-355649189-894321705-1000\Software\Microsoft\Windows\CurrentVersion\Run\	oos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4238149048-355649189-894321705-1000\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-1-5-21-4238149048-355649189-894321705-1000\Software\Microsoft\Windows\CurrentVersion\Run\	Arrival notice.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4238149048-355649189-894321705-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	Arrival notice.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	Arrival notice.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

Arrival notice.exeoos.exe

description	pid	process	target process
PID 3056 set thread context of 620	3056	Arrival notice.exe	Arrival notice.exe
PID 3560 set thread context of 2552	3560	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:

Arrival notice.exe

description ioc process

Key created \REGISTRY\USER\S-1-5-21-4238149048-355649189-894321705-1000_Classes\Local Settings Arrival notice.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

Arrival notice.exe

pid process

3056 Arrival notice.exe
3056 Arrival notice.exe
3056 Arrival notice.exe
3056 Arrival notice.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

Arrival notice.exe

description pid process

Token: SeDebugPrivilege 3056 Arrival notice.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

oos.exe

pid process

2552 oos.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-4238149048-355649189-894321705-1000_Classes\Local Settings	Arrival notice.exe

pid	process
3056	Arrival notice.exe
3056	Arrival notice.exe
3056	Arrival notice.exe
3056	Arrival notice.exe

description	pid	process
Token: SeDebugPrivilege	3056	Arrival notice.exe

pid	process
2552	oos.exe

Suspicious use of WriteProcessMemory 39 IoCs

Processes:

Arrival notice.exeArrival notice.exeWScript.execmd.exeoos.exe

description	pid	process	target process
PID 3056 wrote to memory of 2720	3056	Arrival notice.exe	Arrival notice.exe
PID 3056 wrote to memory of 2720	3056	Arrival notice.exe	Arrival notice.exe
PID 3056 wrote to memory of 2720	3056	Arrival notice.exe	Arrival notice.exe
PID 3056 wrote to memory of 2828	3056	Arrival notice.exe	Arrival notice.exe
PID 3056 wrote to memory of 2828	3056	Arrival notice.exe	Arrival notice.exe
PID 3056 wrote to memory of 2828	3056	Arrival notice.exe	Arrival notice.exe
PID 3056 wrote to memory of 620	3056	Arrival notice.exe	Arrival notice.exe
PID 3056 wrote to memory of 620	3056	Arrival notice.exe	Arrival notice.exe
PID 3056 wrote to memory of 620	3056	Arrival notice.exe	Arrival notice.exe
PID 3056 wrote to memory of 620	3056	Arrival notice.exe	Arrival notice.exe
PID 3056 wrote to memory of 620	3056	Arrival notice.exe	Arrival notice.exe
PID 3056 wrote to memory of 620	3056	Arrival notice.exe	Arrival notice.exe
PID 3056 wrote to memory of 620	3056	Arrival notice.exe	Arrival notice.exe
PID 3056 wrote to memory of 620	3056	Arrival notice.exe	Arrival notice.exe
PID 3056 wrote to memory of 620	3056	Arrival notice.exe	Arrival notice.exe
PID 3056 wrote to memory of 620	3056	Arrival notice.exe	Arrival notice.exe
PID 3056 wrote to memory of 620	3056	Arrival notice.exe	Arrival notice.exe
PID 3056 wrote to memory of 620	3056	Arrival notice.exe	Arrival notice.exe
PID 620 wrote to memory of 3736	620	Arrival notice.exe	WScript.exe
PID 620 wrote to memory of 3736	620	Arrival notice.exe	WScript.exe
PID 620 wrote to memory of 3736	620	Arrival notice.exe	WScript.exe
PID 3736 wrote to memory of 4432	3736	WScript.exe	cmd.exe
PID 3736 wrote to memory of 4432	3736	WScript.exe	cmd.exe
PID 3736 wrote to memory of 4432	3736	WScript.exe	cmd.exe
PID 4432 wrote to memory of 3560	4432	cmd.exe	oos.exe
PID 4432 wrote to memory of 3560	4432	cmd.exe	oos.exe
PID 4432 wrote to memory of 3560	4432	cmd.exe	oos.exe
PID 3560 wrote to memory of 2552	3560	oos.exe	oos.exe
PID 3560 wrote to memory of 2552	3560	oos.exe	oos.exe
PID 3560 wrote to memory of 2552	3560	oos.exe	oos.exe
PID 3560 wrote to memory of 2552	3560	oos.exe	oos.exe
PID 3560 wrote to memory of 2552	3560	oos.exe	oos.exe
PID 3560 wrote to memory of 2552	3560	oos.exe	oos.exe
PID 3560 wrote to memory of 2552	3560	oos.exe	oos.exe
PID 3560 wrote to memory of 2552	3560	oos.exe	oos.exe
PID 3560 wrote to memory of 2552	3560	oos.exe	oos.exe
PID 3560 wrote to memory of 2552	3560	oos.exe	oos.exe
PID 3560 wrote to memory of 2552	3560	oos.exe	oos.exe
PID 3560 wrote to memory of 2552	3560	oos.exe	oos.exe

C:\Users\Admin\AppData\Local\Temp\Arrival notice.exe
"C:\Users\Admin\AppData\Local\Temp\Arrival notice.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3056

C:\Users\Admin\AppData\Local\Temp\Arrival notice.exe
"C:\Users\Admin\AppData\Local\Temp\Arrival notice.exe"
2⤵
PID:2720

C:\Users\Admin\AppData\Local\Temp\Arrival notice.exe
"C:\Users\Admin\AppData\Local\Temp\Arrival notice.exe"
2⤵
PID:2828

C:\Users\Admin\AppData\Local\Temp\Arrival notice.exe
"C:\Users\Admin\AppData\Local\Temp\Arrival notice.exe"
2⤵
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:620

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:3736

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\oos.exe"
4⤵
- Suspicious use of WriteProcessMemory
PID:4432

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:3560

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:2552

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
8b8305f64572244a2c69e6b6e9a8e466

SHA1
7d9c4c58456da53f0cac25fe0edc2dbcbf288859

SHA256
af66d326c2d72b64116773c90ec9f55637ccd02d9924cde28b3d70ba8ba1610b

SHA512
937f4959754da8399c20e315d62b72e745249c7d0c51f99e3c99bb69f9e08192184edee9bb1abe290b4be6e13163b9b4c1f9d84a22bb3ece5148fc298055799a

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
933KB

MD5
cd4bacd0528a0f7efdea9be27414c6e7

SHA1
fd92ca627cc15e4ed350478fa5aa575ef39adacf

SHA256
e96aed97b899d7cfc37b229f045f6b87623f9abd97b15256fa6322685cb2c5f0

SHA512
bd7c3e1a86bc2eeb21105a308ceaa94b9b930d9c179b255d1563491f6dfad010f3efcf3796d25a110769f54484aae9a8f0224f7d6788007a4651c7d70beef37a

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
933KB

MD5
cd4bacd0528a0f7efdea9be27414c6e7

SHA1
fd92ca627cc15e4ed350478fa5aa575ef39adacf

SHA256
e96aed97b899d7cfc37b229f045f6b87623f9abd97b15256fa6322685cb2c5f0

SHA512
bd7c3e1a86bc2eeb21105a308ceaa94b9b930d9c179b255d1563491f6dfad010f3efcf3796d25a110769f54484aae9a8f0224f7d6788007a4651c7d70beef37a

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
933KB

MD5
cd4bacd0528a0f7efdea9be27414c6e7

SHA1
fd92ca627cc15e4ed350478fa5aa575ef39adacf

SHA256
e96aed97b899d7cfc37b229f045f6b87623f9abd97b15256fa6322685cb2c5f0

SHA512
bd7c3e1a86bc2eeb21105a308ceaa94b9b930d9c179b255d1563491f6dfad010f3efcf3796d25a110769f54484aae9a8f0224f7d6788007a4651c7d70beef37a

Download Submit
memory/620-144-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/620-151-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/620-148-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/620-141-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/620-142-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2552-167-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2552-169-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2552-185-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2552-184-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2552-177-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2552-176-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2552-171-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2552-170-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2552-168-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2552-165-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2552-164-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2552-162-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3056-135-0x0000000006080000-0x0000000006624000-memory.dmp

Filesize
5.6MB

Download
memory/3056-133-0x0000000000F40000-0x000000000102E000-memory.dmp

Filesize
952KB

Download
memory/3056-140-0x0000000009990000-0x0000000009A2C000-memory.dmp

Filesize
624KB

Download
memory/3056-136-0x0000000005BB0000-0x0000000005C42000-memory.dmp

Filesize
584KB

Download
memory/3056-137-0x0000000005940000-0x0000000005950000-memory.dmp

Filesize
64KB

Download
memory/3056-134-0x0000000005940000-0x0000000005950000-memory.dmp

Filesize
64KB

Download
memory/3056-138-0x0000000005940000-0x0000000005950000-memory.dmp

Filesize
64KB

Download
memory/3056-139-0x0000000005940000-0x0000000005950000-memory.dmp

Filesize
64KB

Download
memory/3560-159-0x0000000005320000-0x0000000005330000-memory.dmp

Filesize
64KB

Download
memory/3560-158-0x0000000005320000-0x0000000005330000-memory.dmp

Filesize
64KB

Download
memory/3560-157-0x0000000005320000-0x0000000005330000-memory.dmp

Filesize
64KB

Download
memory/3560-156-0x0000000005320000-0x0000000005330000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads