remcos | cd53007fc79e7078155fef915142ca15d695c3a1ba6494d3027365cf24157f5a

General

Target

tmp.exe
Size

1011KB
MD5

0e167d008251242527393eeebbad5542
SHA1

0520dd52fb34374ddcbd738ac327a4737b226a62
SHA256

cd53007fc79e7078155fef915142ca15d695c3a1ba6494d3027365cf24157f5a
SHA512

42f5366a42b7bdf0dd88363903048a93e124772176f292393296e3d498835972154ff656d60035633668ea2fe225dec7f381b08d4533206316f4ee634f3e14bf
SSDEEP

24576:jzl6Tw725gBZ6oaoyI7MTgGxQLJluWccesdF:jM07yo6pEoTgyWnuCesdF

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

384 oos.exe
1632 oos.exe
Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

316 cmd.exe

pid	process
384	oos.exe
1632	oos.exe

pid	process
316	cmd.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
Set value (str)	\REGISTRY\USER\S-1-5-21-3499517378-2376672570-1134980332-1000\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-1-5-21-3499517378-2376672570-1134980332-1000\Software\Microsoft\Windows\CurrentVersion\Run\	tmp.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3499517378-2376672570-1134980332-1000\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-1-5-21-3499517378-2376672570-1134980332-1000\Software\Microsoft\Windows\CurrentVersion\Run\	oos.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

tmp.exeoos.exe

description pid process target process

PID 1604 set thread context of 1164 1604 tmp.exe tmp.exe
PID 384 set thread context of 1632 384 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

1632 oos.exe

description	pid	process	target process
PID 1604 set thread context of 1164	1604	tmp.exe	tmp.exe
PID 384 set thread context of 1632	384	oos.exe	oos.exe

pid	process
1632	oos.exe

Suspicious use of WriteProcessMemory 38 IoCs

Processes:

tmp.exetmp.exeWScript.execmd.exeoos.exe

description	pid	process	target process
PID 1604 wrote to memory of 1164	1604	tmp.exe	tmp.exe
PID 1604 wrote to memory of 1164	1604	tmp.exe	tmp.exe
PID 1604 wrote to memory of 1164	1604	tmp.exe	tmp.exe
PID 1604 wrote to memory of 1164	1604	tmp.exe	tmp.exe
PID 1604 wrote to memory of 1164	1604	tmp.exe	tmp.exe
PID 1604 wrote to memory of 1164	1604	tmp.exe	tmp.exe
PID 1604 wrote to memory of 1164	1604	tmp.exe	tmp.exe
PID 1604 wrote to memory of 1164	1604	tmp.exe	tmp.exe
PID 1604 wrote to memory of 1164	1604	tmp.exe	tmp.exe
PID 1604 wrote to memory of 1164	1604	tmp.exe	tmp.exe
PID 1604 wrote to memory of 1164	1604	tmp.exe	tmp.exe
PID 1604 wrote to memory of 1164	1604	tmp.exe	tmp.exe
PID 1604 wrote to memory of 1164	1604	tmp.exe	tmp.exe
PID 1164 wrote to memory of 2000	1164	tmp.exe	WScript.exe
PID 1164 wrote to memory of 2000	1164	tmp.exe	WScript.exe
PID 1164 wrote to memory of 2000	1164	tmp.exe	WScript.exe
PID 1164 wrote to memory of 2000	1164	tmp.exe	WScript.exe
PID 2000 wrote to memory of 316	2000	WScript.exe	cmd.exe
PID 2000 wrote to memory of 316	2000	WScript.exe	cmd.exe
PID 2000 wrote to memory of 316	2000	WScript.exe	cmd.exe
PID 2000 wrote to memory of 316	2000	WScript.exe	cmd.exe
PID 316 wrote to memory of 384	316	cmd.exe	oos.exe
PID 316 wrote to memory of 384	316	cmd.exe	oos.exe
PID 316 wrote to memory of 384	316	cmd.exe	oos.exe
PID 316 wrote to memory of 384	316	cmd.exe	oos.exe
PID 384 wrote to memory of 1632	384	oos.exe	oos.exe
PID 384 wrote to memory of 1632	384	oos.exe	oos.exe
PID 384 wrote to memory of 1632	384	oos.exe	oos.exe
PID 384 wrote to memory of 1632	384	oos.exe	oos.exe
PID 384 wrote to memory of 1632	384	oos.exe	oos.exe
PID 384 wrote to memory of 1632	384	oos.exe	oos.exe
PID 384 wrote to memory of 1632	384	oos.exe	oos.exe
PID 384 wrote to memory of 1632	384	oos.exe	oos.exe
PID 384 wrote to memory of 1632	384	oos.exe	oos.exe
PID 384 wrote to memory of 1632	384	oos.exe	oos.exe
PID 384 wrote to memory of 1632	384	oos.exe	oos.exe
PID 384 wrote to memory of 1632	384	oos.exe	oos.exe
PID 384 wrote to memory of 1632	384	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:1604

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:1164

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
3⤵
- Suspicious use of WriteProcessMemory
PID:2000

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:316

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:384

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:1632

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
1491b7dfb365d1a53c3c5e5c02ba9722

SHA1
437e073dd69462c6fc31c0f9d265833382f65646

SHA256
360bcaad8d317d22f5a3ffcf108d403f9896c24b4887cd7604587d61f68ae95a

SHA512
70062f975d68d37822d19608838b16ad9588b2dee12197bd646be8044d05fd9d402f0742f95ea0cf74e4d54f0bc5a2db497b51357a5bcde1e2b72aeab81a1cb3

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
1011KB

MD5
0e167d008251242527393eeebbad5542

SHA1
0520dd52fb34374ddcbd738ac327a4737b226a62

SHA256
cd53007fc79e7078155fef915142ca15d695c3a1ba6494d3027365cf24157f5a

SHA512
42f5366a42b7bdf0dd88363903048a93e124772176f292393296e3d498835972154ff656d60035633668ea2fe225dec7f381b08d4533206316f4ee634f3e14bf

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
1011KB

MD5
0e167d008251242527393eeebbad5542

SHA1
0520dd52fb34374ddcbd738ac327a4737b226a62

SHA256
cd53007fc79e7078155fef915142ca15d695c3a1ba6494d3027365cf24157f5a

SHA512
42f5366a42b7bdf0dd88363903048a93e124772176f292393296e3d498835972154ff656d60035633668ea2fe225dec7f381b08d4533206316f4ee634f3e14bf

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
1011KB

MD5
0e167d008251242527393eeebbad5542

SHA1
0520dd52fb34374ddcbd738ac327a4737b226a62

SHA256
cd53007fc79e7078155fef915142ca15d695c3a1ba6494d3027365cf24157f5a

SHA512
42f5366a42b7bdf0dd88363903048a93e124772176f292393296e3d498835972154ff656d60035633668ea2fe225dec7f381b08d4533206316f4ee634f3e14bf

Download Submit
\Users\Admin\AppData\Roaming\oos.exe
Filesize
1011KB

MD5
0e167d008251242527393eeebbad5542

SHA1
0520dd52fb34374ddcbd738ac327a4737b226a62

SHA256
cd53007fc79e7078155fef915142ca15d695c3a1ba6494d3027365cf24157f5a

SHA512
42f5366a42b7bdf0dd88363903048a93e124772176f292393296e3d498835972154ff656d60035633668ea2fe225dec7f381b08d4533206316f4ee634f3e14bf

Download Submit
memory/384-84-0x0000000004C90000-0x0000000004CD0000-memory.dmp

Filesize
256KB

Download
memory/384-83-0x0000000004C90000-0x0000000004CD0000-memory.dmp

Filesize
256KB

Download
memory/384-82-0x0000000000080000-0x0000000000182000-memory.dmp

Filesize
1.0MB

Download
memory/1164-64-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1164-60-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1164-65-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1164-66-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1164-68-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1164-67-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1164-69-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1164-71-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1164-77-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1164-63-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1164-62-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1164-61-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1604-56-0x00000000005F0000-0x0000000000608000-memory.dmp

Filesize
96KB

Download
memory/1604-59-0x0000000005CA0000-0x0000000005D1E000-memory.dmp

Filesize
504KB

Download
memory/1604-58-0x0000000005E30000-0x0000000005F20000-memory.dmp

Filesize
960KB

Download
memory/1604-57-0x0000000000530000-0x0000000000570000-memory.dmp

Filesize
256KB

Download
memory/1604-55-0x0000000000530000-0x0000000000570000-memory.dmp

Filesize
256KB

Download
memory/1604-54-0x0000000001340000-0x0000000001442000-memory.dmp

Filesize
1.0MB

Download
memory/1632-103-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1632-105-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1632-100-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1632-101-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1632-102-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1632-97-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1632-104-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1632-98-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1632-108-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1632-111-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1632-112-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1632-113-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1632-93-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1632-119-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1632-120-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download

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