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
Executes dropped EXE 2 IoCs

Processes:

oos.exeoos.exe

pid process

1300 oos.exe
688 oos.exe
Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

1328 cmd.exe

pid	process
1300	oos.exe
688	oos.exe

pid	process
1328	cmd.exe

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

tmp.exeoos.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000\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
Key created	\REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000\Software\Microsoft\Windows\CurrentVersion\Run\	oos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000\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-1-5-21-2647223082-2067913677-935928954-1000\Software\Microsoft\Windows\CurrentVersion\Run\	tmp.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

tmp.exeoos.exe

description pid process target process

PID 2040 set thread context of 1644 2040 tmp.exe tmp.exe
PID 1300 set thread context of 688 1300 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
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

oos.exe

pid process

688 oos.exe

description	pid	process	target process
PID 2040 set thread context of 1644	2040	tmp.exe	tmp.exe
PID 1300 set thread context of 688	1300	oos.exe	oos.exe

pid	process
688	oos.exe

Suspicious use of WriteProcessMemory 38 IoCs

Processes:

tmp.exetmp.exeWScript.execmd.exeoos.exe

description	pid	process	target process
PID 2040 wrote to memory of 1644	2040	tmp.exe	tmp.exe
PID 2040 wrote to memory of 1644	2040	tmp.exe	tmp.exe
PID 2040 wrote to memory of 1644	2040	tmp.exe	tmp.exe
PID 2040 wrote to memory of 1644	2040	tmp.exe	tmp.exe
PID 2040 wrote to memory of 1644	2040	tmp.exe	tmp.exe
PID 2040 wrote to memory of 1644	2040	tmp.exe	tmp.exe
PID 2040 wrote to memory of 1644	2040	tmp.exe	tmp.exe
PID 2040 wrote to memory of 1644	2040	tmp.exe	tmp.exe
PID 2040 wrote to memory of 1644	2040	tmp.exe	tmp.exe
PID 2040 wrote to memory of 1644	2040	tmp.exe	tmp.exe
PID 2040 wrote to memory of 1644	2040	tmp.exe	tmp.exe
PID 2040 wrote to memory of 1644	2040	tmp.exe	tmp.exe
PID 2040 wrote to memory of 1644	2040	tmp.exe	tmp.exe
PID 1644 wrote to memory of 1340	1644	tmp.exe	WScript.exe
PID 1644 wrote to memory of 1340	1644	tmp.exe	WScript.exe
PID 1644 wrote to memory of 1340	1644	tmp.exe	WScript.exe
PID 1644 wrote to memory of 1340	1644	tmp.exe	WScript.exe
PID 1340 wrote to memory of 1328	1340	WScript.exe	cmd.exe
PID 1340 wrote to memory of 1328	1340	WScript.exe	cmd.exe
PID 1340 wrote to memory of 1328	1340	WScript.exe	cmd.exe
PID 1340 wrote to memory of 1328	1340	WScript.exe	cmd.exe
PID 1328 wrote to memory of 1300	1328	cmd.exe	oos.exe
PID 1328 wrote to memory of 1300	1328	cmd.exe	oos.exe
PID 1328 wrote to memory of 1300	1328	cmd.exe	oos.exe
PID 1328 wrote to memory of 1300	1328	cmd.exe	oos.exe
PID 1300 wrote to memory of 688	1300	oos.exe	oos.exe
PID 1300 wrote to memory of 688	1300	oos.exe	oos.exe
PID 1300 wrote to memory of 688	1300	oos.exe	oos.exe
PID 1300 wrote to memory of 688	1300	oos.exe	oos.exe
PID 1300 wrote to memory of 688	1300	oos.exe	oos.exe
PID 1300 wrote to memory of 688	1300	oos.exe	oos.exe
PID 1300 wrote to memory of 688	1300	oos.exe	oos.exe
PID 1300 wrote to memory of 688	1300	oos.exe	oos.exe
PID 1300 wrote to memory of 688	1300	oos.exe	oos.exe
PID 1300 wrote to memory of 688	1300	oos.exe	oos.exe
PID 1300 wrote to memory of 688	1300	oos.exe	oos.exe
PID 1300 wrote to memory of 688	1300	oos.exe	oos.exe
PID 1300 wrote to memory of 688	1300	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:2040

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
2⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1644

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
3⤵
- Suspicious use of WriteProcessMemory
PID:1340

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\oos.exe"
4⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1328

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:1300

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:688

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

System Information Discovery

1

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
\Users\Admin\AppData\Roaming\oos.exe
Filesize
1002KB

MD5
f46d06135ec1f3705b556f830f1de372

SHA1
a1d4c48f24a72ce044faf64ebabfc94c3ac5999b

SHA256
3962ae9db78b08a86e6907b321a399ca5a83abf3032ef68c16637f840e8992a8

SHA512
c1e1a5e6f3bc6b0f704eb715ccb8e0f6afea94c04c7ac1bf634b336142d05db3fb30ca9d9c7da15fa853c89ce698981f49e9bd54ea7d81fc101e53f7ff788939

Download Submit
memory/688-100-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/688-93-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/688-119-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/688-118-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/688-114-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/688-111-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/688-110-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/688-106-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/688-105-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/688-104-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/688-103-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/688-102-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/688-101-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/688-98-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/688-97-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1300-83-0x0000000004C20000-0x0000000004C60000-memory.dmp

Filesize
256KB

Download
memory/1300-84-0x0000000004C20000-0x0000000004C60000-memory.dmp

Filesize
256KB

Download
memory/1300-82-0x0000000000E20000-0x0000000000F20000-memory.dmp

Filesize
1024KB

Download
memory/1644-65-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1644-69-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1644-62-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1644-63-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1644-64-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1644-60-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1644-61-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1644-77-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1644-71-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1644-66-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1644-68-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1644-67-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2040-57-0x0000000000EA0000-0x0000000000EE0000-memory.dmp

Filesize
256KB

Download
memory/2040-54-0x00000000011E0000-0x00000000012E0000-memory.dmp

Filesize
1024KB

Download
memory/2040-59-0x0000000005C30000-0x0000000005CAE000-memory.dmp

Filesize
504KB

Download
memory/2040-55-0x0000000000EA0000-0x0000000000EE0000-memory.dmp

Filesize
256KB

Download
memory/2040-58-0x0000000007DB0000-0x0000000007EA0000-memory.dmp

Filesize
960KB

Download
memory/2040-56-0x0000000000650000-0x0000000000668000-memory.dmp

Filesize
96KB

Download

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