remcos | d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e

General

Target

tmp.exe
Size

934KB
MD5

706ac294f54bfd2a28d03f1c79165f9b
SHA1

3d1dfcfe35776eb04ecd773f1d2038f74dbcb4f0
SHA256

d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e
SHA512

aeb77106f3ac27c05a0178ad56b8d959d3120e883575732e2e656ffc596e23b81e6673ea03fd54598028c1c45a2155c83f8a1f4d3a981a7777e459cb3e7b68c0
SSDEEP

24576:hYjlN8ydjXnTVJQU/i35XN8JxiNGIJui/+:hYjlN9jXnTQUi59+xiNA1

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 3 IoCs

Processes:

oos.exeoos.exeoos.exe

pid process

1688 oos.exe
2040 oos.exe
2020 oos.exe
Loads dropped DLL 2 IoCs

Processes:

cmd.exe

pid process

364 cmd.exe
364 cmd.exe

pid	process
1688	oos.exe
2040	oos.exe
2020	oos.exe

pid	process
364	cmd.exe
364	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
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-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\	oos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\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-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\	tmp.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\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 1064 set thread context of 460 1064 tmp.exe tmp.exe
PID 1688 set thread context of 2020 1688 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 behavior: EnumeratesProcesses 2 IoCs

Processes:

tmp.exeoos.exe

pid process

1064 tmp.exe
1688 oos.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

tmp.exeoos.exe

description pid process

Token: SeDebugPrivilege 1064 tmp.exe
Token: SeDebugPrivilege 1688 oos.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

oos.exe

pid process

2020 oos.exe

description	pid	process	target process
PID 1064 set thread context of 460	1064	tmp.exe	tmp.exe
PID 1688 set thread context of 2020	1688	oos.exe	oos.exe

pid	process
1064	tmp.exe
1688	oos.exe

description	pid	process
Token: SeDebugPrivilege	1064	tmp.exe
Token: SeDebugPrivilege	1688	oos.exe

pid	process
2020	oos.exe

Suspicious use of WriteProcessMemory 46 IoCs

Processes:

tmp.exetmp.exeWScript.execmd.exeoos.exe

description	pid	process	target process
PID 1064 wrote to memory of 1008	1064	tmp.exe	tmp.exe
PID 1064 wrote to memory of 1008	1064	tmp.exe	tmp.exe
PID 1064 wrote to memory of 1008	1064	tmp.exe	tmp.exe
PID 1064 wrote to memory of 1008	1064	tmp.exe	tmp.exe
PID 1064 wrote to memory of 460	1064	tmp.exe	tmp.exe
PID 1064 wrote to memory of 460	1064	tmp.exe	tmp.exe
PID 1064 wrote to memory of 460	1064	tmp.exe	tmp.exe
PID 1064 wrote to memory of 460	1064	tmp.exe	tmp.exe
PID 1064 wrote to memory of 460	1064	tmp.exe	tmp.exe
PID 1064 wrote to memory of 460	1064	tmp.exe	tmp.exe
PID 1064 wrote to memory of 460	1064	tmp.exe	tmp.exe
PID 1064 wrote to memory of 460	1064	tmp.exe	tmp.exe
PID 1064 wrote to memory of 460	1064	tmp.exe	tmp.exe
PID 1064 wrote to memory of 460	1064	tmp.exe	tmp.exe
PID 1064 wrote to memory of 460	1064	tmp.exe	tmp.exe
PID 1064 wrote to memory of 460	1064	tmp.exe	tmp.exe
PID 1064 wrote to memory of 460	1064	tmp.exe	tmp.exe
PID 460 wrote to memory of 612	460	tmp.exe	WScript.exe
PID 460 wrote to memory of 612	460	tmp.exe	WScript.exe
PID 460 wrote to memory of 612	460	tmp.exe	WScript.exe
PID 460 wrote to memory of 612	460	tmp.exe	WScript.exe
PID 612 wrote to memory of 364	612	WScript.exe	cmd.exe
PID 612 wrote to memory of 364	612	WScript.exe	cmd.exe
PID 612 wrote to memory of 364	612	WScript.exe	cmd.exe
PID 612 wrote to memory of 364	612	WScript.exe	cmd.exe
PID 364 wrote to memory of 1688	364	cmd.exe	oos.exe
PID 364 wrote to memory of 1688	364	cmd.exe	oos.exe
PID 364 wrote to memory of 1688	364	cmd.exe	oos.exe
PID 364 wrote to memory of 1688	364	cmd.exe	oos.exe
PID 1688 wrote to memory of 2040	1688	oos.exe	oos.exe
PID 1688 wrote to memory of 2040	1688	oos.exe	oos.exe
PID 1688 wrote to memory of 2040	1688	oos.exe	oos.exe
PID 1688 wrote to memory of 2040	1688	oos.exe	oos.exe
PID 1688 wrote to memory of 2020	1688	oos.exe	oos.exe
PID 1688 wrote to memory of 2020	1688	oos.exe	oos.exe
PID 1688 wrote to memory of 2020	1688	oos.exe	oos.exe
PID 1688 wrote to memory of 2020	1688	oos.exe	oos.exe
PID 1688 wrote to memory of 2020	1688	oos.exe	oos.exe
PID 1688 wrote to memory of 2020	1688	oos.exe	oos.exe
PID 1688 wrote to memory of 2020	1688	oos.exe	oos.exe
PID 1688 wrote to memory of 2020	1688	oos.exe	oos.exe
PID 1688 wrote to memory of 2020	1688	oos.exe	oos.exe
PID 1688 wrote to memory of 2020	1688	oos.exe	oos.exe
PID 1688 wrote to memory of 2020	1688	oos.exe	oos.exe
PID 1688 wrote to memory of 2020	1688	oos.exe	oos.exe
PID 1688 wrote to memory of 2020	1688	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 behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1064

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
2⤵
PID:1008

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:460

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
3⤵
- Suspicious use of WriteProcessMemory
PID:612

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:364

C:\Users\Admin\AppData\Roaming\oos.exe
C:\Users\Admin\AppData\Roaming\oos.exe
5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1688

C:\Users\Admin\AppData\Roaming\oos.exe
"C:\Users\Admin\AppData\Roaming\oos.exe"
6⤵
- Executes dropped EXE
PID:2040

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:2020

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:\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
706ac294f54bfd2a28d03f1c79165f9b

SHA1
3d1dfcfe35776eb04ecd773f1d2038f74dbcb4f0

SHA256
d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e

SHA512
aeb77106f3ac27c05a0178ad56b8d959d3120e883575732e2e656ffc596e23b81e6673ea03fd54598028c1c45a2155c83f8a1f4d3a981a7777e459cb3e7b68c0

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

MD5
706ac294f54bfd2a28d03f1c79165f9b

SHA1
3d1dfcfe35776eb04ecd773f1d2038f74dbcb4f0

SHA256
d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e

SHA512
aeb77106f3ac27c05a0178ad56b8d959d3120e883575732e2e656ffc596e23b81e6673ea03fd54598028c1c45a2155c83f8a1f4d3a981a7777e459cb3e7b68c0

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

MD5
706ac294f54bfd2a28d03f1c79165f9b

SHA1
3d1dfcfe35776eb04ecd773f1d2038f74dbcb4f0

SHA256
d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e

SHA512
aeb77106f3ac27c05a0178ad56b8d959d3120e883575732e2e656ffc596e23b81e6673ea03fd54598028c1c45a2155c83f8a1f4d3a981a7777e459cb3e7b68c0

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

MD5
706ac294f54bfd2a28d03f1c79165f9b

SHA1
3d1dfcfe35776eb04ecd773f1d2038f74dbcb4f0

SHA256
d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e

SHA512
aeb77106f3ac27c05a0178ad56b8d959d3120e883575732e2e656ffc596e23b81e6673ea03fd54598028c1c45a2155c83f8a1f4d3a981a7777e459cb3e7b68c0

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

MD5
706ac294f54bfd2a28d03f1c79165f9b

SHA1
3d1dfcfe35776eb04ecd773f1d2038f74dbcb4f0

SHA256
d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e

SHA512
aeb77106f3ac27c05a0178ad56b8d959d3120e883575732e2e656ffc596e23b81e6673ea03fd54598028c1c45a2155c83f8a1f4d3a981a7777e459cb3e7b68c0

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

MD5
706ac294f54bfd2a28d03f1c79165f9b

SHA1
3d1dfcfe35776eb04ecd773f1d2038f74dbcb4f0

SHA256
d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e

SHA512
aeb77106f3ac27c05a0178ad56b8d959d3120e883575732e2e656ffc596e23b81e6673ea03fd54598028c1c45a2155c83f8a1f4d3a981a7777e459cb3e7b68c0

Download Submit
memory/364-81-0x0000000000000000-mapping.dmp

Download
memory/460-63-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/460-60-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/460-66-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/460-67-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/460-68-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/460-70-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/460-72-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/460-73-0x000000000043168C-mapping.dmp

Download
memory/460-76-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/460-65-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/460-78-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/460-61-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/612-77-0x0000000000000000-mapping.dmp

Download
memory/1064-56-0x0000000004EC0000-0x0000000004FA4000-memory.dmp

Filesize
912KB

Download
memory/1064-59-0x0000000005E60000-0x0000000005EDA000-memory.dmp

Filesize
488KB

Download
memory/1064-54-0x0000000000920000-0x0000000000A10000-memory.dmp

Filesize
960KB

Download
memory/1064-58-0x0000000007F80000-0x0000000008030000-memory.dmp

Filesize
704KB

Download
memory/1064-57-0x0000000000900000-0x0000000000916000-memory.dmp

Filesize
88KB

Download
memory/1064-55-0x0000000075BB1000-0x0000000075BB3000-memory.dmp

Filesize
8KB

Download
memory/1688-85-0x0000000000000000-mapping.dmp

Download
memory/1688-87-0x0000000000DB0000-0x0000000000EA0000-memory.dmp

Filesize
960KB

Download
memory/2020-103-0x000000000043168C-mapping.dmp

Download
memory/2020-107-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2020-108-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2020-109-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download

Analysis

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