remcos | bf5a377899f6233ee48281997d6c23ae42f78319f6368e946ffa78de01fa307d

Analysis

max time kernel
92s
max time network
49s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
01-11-2022 09:37

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General

Target

tmp.exe
Size

935KB
MD5

24a3d9e65e52ca7808b8b54f4fd49293
SHA1

ba8ba4083f5f9e2f638f972c077c7358dd4db546
SHA256

bf5a377899f6233ee48281997d6c23ae42f78319f6368e946ffa78de01fa307d
SHA512

9d88d1455ad1760a60fca2951209bfed16ee9b7b171d7a7e1f7460325aa16b32dfbd0a3e3c943b77d5820ce52e769672d7bb4109e01687064428e330e670cd2d
SSDEEP

24576:3X1fONoAqzW2tYD6yzNyMZq08dHr17VsYu8v8G68Eg:n1mNoRzyD6oyjHrtXu3X8E

Score

10^/10

remcos xp persistence rat

Malware Config

Extracted

Family

remcos

Botnet

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 6 IoCs

Processes:

oos.exeoos.exeoos.exeoos.exeoos.exeoos.exe

pid process

1416 oos.exe
836 oos.exe
2000 oos.exe
1980 oos.exe
1952 oos.exe
1988 oos.exe
Loads dropped DLL 2 IoCs

Processes:

cmd.exe

pid process

360 cmd.exe
360 cmd.exe

pid	process
1416	oos.exe
836	oos.exe
2000	oos.exe
1980	oos.exe
1952	oos.exe
1988	oos.exe

pid	process
360	cmd.exe
360	cmd.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

tmp.exe

description	ioc	process
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
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 1 IoCs

Processes:

tmp.exe

description pid process target process

PID 1284 set thread context of 268 1284 tmp.exe tmp.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 5 IoCs

Processes:

oos.exe

pid process

1416 oos.exe
1416 oos.exe
1416 oos.exe
1416 oos.exe
1416 oos.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

oos.exe

description pid process

Token: SeDebugPrivilege 1416 oos.exe

description	pid	process	target process
PID 1284 set thread context of 268	1284	tmp.exe	tmp.exe

pid	process
1416	oos.exe
1416	oos.exe
1416	oos.exe
1416	oos.exe
1416	oos.exe

description	pid	process
Token: SeDebugPrivilege	1416	oos.exe

Suspicious use of WriteProcessMemory 45 IoCs

Processes:

tmp.exetmp.exeWScript.execmd.exeoos.exe

description	pid	process	target process
PID 1284 wrote to memory of 268	1284	tmp.exe	tmp.exe
PID 1284 wrote to memory of 268	1284	tmp.exe	tmp.exe
PID 1284 wrote to memory of 268	1284	tmp.exe	tmp.exe
PID 1284 wrote to memory of 268	1284	tmp.exe	tmp.exe
PID 1284 wrote to memory of 268	1284	tmp.exe	tmp.exe
PID 1284 wrote to memory of 268	1284	tmp.exe	tmp.exe
PID 1284 wrote to memory of 268	1284	tmp.exe	tmp.exe
PID 1284 wrote to memory of 268	1284	tmp.exe	tmp.exe
PID 1284 wrote to memory of 268	1284	tmp.exe	tmp.exe
PID 1284 wrote to memory of 268	1284	tmp.exe	tmp.exe
PID 1284 wrote to memory of 268	1284	tmp.exe	tmp.exe
PID 1284 wrote to memory of 268	1284	tmp.exe	tmp.exe
PID 1284 wrote to memory of 268	1284	tmp.exe	tmp.exe
PID 268 wrote to memory of 1212	268	tmp.exe	WScript.exe
PID 268 wrote to memory of 1212	268	tmp.exe	WScript.exe
PID 268 wrote to memory of 1212	268	tmp.exe	WScript.exe
PID 268 wrote to memory of 1212	268	tmp.exe	WScript.exe
PID 1212 wrote to memory of 360	1212	WScript.exe	cmd.exe
PID 1212 wrote to memory of 360	1212	WScript.exe	cmd.exe
PID 1212 wrote to memory of 360	1212	WScript.exe	cmd.exe
PID 1212 wrote to memory of 360	1212	WScript.exe	cmd.exe
PID 360 wrote to memory of 1416	360	cmd.exe	oos.exe
PID 360 wrote to memory of 1416	360	cmd.exe	oos.exe
PID 360 wrote to memory of 1416	360	cmd.exe	oos.exe
PID 360 wrote to memory of 1416	360	cmd.exe	oos.exe
PID 1416 wrote to memory of 836	1416	oos.exe	oos.exe
PID 1416 wrote to memory of 836	1416	oos.exe	oos.exe
PID 1416 wrote to memory of 836	1416	oos.exe	oos.exe
PID 1416 wrote to memory of 836	1416	oos.exe	oos.exe
PID 1416 wrote to memory of 2000	1416	oos.exe	oos.exe
PID 1416 wrote to memory of 2000	1416	oos.exe	oos.exe
PID 1416 wrote to memory of 2000	1416	oos.exe	oos.exe
PID 1416 wrote to memory of 2000	1416	oos.exe	oos.exe
PID 1416 wrote to memory of 1980	1416	oos.exe	oos.exe
PID 1416 wrote to memory of 1980	1416	oos.exe	oos.exe
PID 1416 wrote to memory of 1980	1416	oos.exe	oos.exe
PID 1416 wrote to memory of 1980	1416	oos.exe	oos.exe
PID 1416 wrote to memory of 1952	1416	oos.exe	oos.exe
PID 1416 wrote to memory of 1952	1416	oos.exe	oos.exe
PID 1416 wrote to memory of 1952	1416	oos.exe	oos.exe
PID 1416 wrote to memory of 1952	1416	oos.exe	oos.exe
PID 1416 wrote to memory of 1988	1416	oos.exe	oos.exe
PID 1416 wrote to memory of 1988	1416	oos.exe	oos.exe
PID 1416 wrote to memory of 1988	1416	oos.exe	oos.exe
PID 1416 wrote to memory of 1988	1416	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:1284

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:268

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
3⤵
- Suspicious use of WriteProcessMemory
PID:1212

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:360

C:\Users\Admin\AppData\Roaming\oos.exe
C:\Users\Admin\AppData\Roaming\oos.exe
5⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1416

C:\Users\Admin\AppData\Roaming\oos.exe
"C:\Users\Admin\AppData\Roaming\oos.exe"
6⤵
- Executes dropped EXE
PID:836

C:\Users\Admin\AppData\Roaming\oos.exe
"C:\Users\Admin\AppData\Roaming\oos.exe"
6⤵
- Executes dropped EXE
PID:2000

C:\Users\Admin\AppData\Roaming\oos.exe
"C:\Users\Admin\AppData\Roaming\oos.exe"
6⤵
- Executes dropped EXE
PID:1980

C:\Users\Admin\AppData\Roaming\oos.exe
"C:\Users\Admin\AppData\Roaming\oos.exe"
6⤵
- Executes dropped EXE
PID:1952

C:\Users\Admin\AppData\Roaming\oos.exe
"C:\Users\Admin\AppData\Roaming\oos.exe"
6⤵
- Executes dropped EXE
PID:1988

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

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
935KB

MD5
24a3d9e65e52ca7808b8b54f4fd49293

SHA1
ba8ba4083f5f9e2f638f972c077c7358dd4db546

SHA256
bf5a377899f6233ee48281997d6c23ae42f78319f6368e946ffa78de01fa307d

SHA512
9d88d1455ad1760a60fca2951209bfed16ee9b7b171d7a7e1f7460325aa16b32dfbd0a3e3c943b77d5820ce52e769672d7bb4109e01687064428e330e670cd2d

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
935KB

MD5
24a3d9e65e52ca7808b8b54f4fd49293

SHA1
ba8ba4083f5f9e2f638f972c077c7358dd4db546

SHA256
bf5a377899f6233ee48281997d6c23ae42f78319f6368e946ffa78de01fa307d

SHA512
9d88d1455ad1760a60fca2951209bfed16ee9b7b171d7a7e1f7460325aa16b32dfbd0a3e3c943b77d5820ce52e769672d7bb4109e01687064428e330e670cd2d

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
935KB

MD5
24a3d9e65e52ca7808b8b54f4fd49293

SHA1
ba8ba4083f5f9e2f638f972c077c7358dd4db546

SHA256
bf5a377899f6233ee48281997d6c23ae42f78319f6368e946ffa78de01fa307d

SHA512
9d88d1455ad1760a60fca2951209bfed16ee9b7b171d7a7e1f7460325aa16b32dfbd0a3e3c943b77d5820ce52e769672d7bb4109e01687064428e330e670cd2d

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
935KB

MD5
24a3d9e65e52ca7808b8b54f4fd49293

SHA1
ba8ba4083f5f9e2f638f972c077c7358dd4db546

SHA256
bf5a377899f6233ee48281997d6c23ae42f78319f6368e946ffa78de01fa307d

SHA512
9d88d1455ad1760a60fca2951209bfed16ee9b7b171d7a7e1f7460325aa16b32dfbd0a3e3c943b77d5820ce52e769672d7bb4109e01687064428e330e670cd2d

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
935KB

MD5
24a3d9e65e52ca7808b8b54f4fd49293

SHA1
ba8ba4083f5f9e2f638f972c077c7358dd4db546

SHA256
bf5a377899f6233ee48281997d6c23ae42f78319f6368e946ffa78de01fa307d

SHA512
9d88d1455ad1760a60fca2951209bfed16ee9b7b171d7a7e1f7460325aa16b32dfbd0a3e3c943b77d5820ce52e769672d7bb4109e01687064428e330e670cd2d

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
935KB

MD5
24a3d9e65e52ca7808b8b54f4fd49293

SHA1
ba8ba4083f5f9e2f638f972c077c7358dd4db546

SHA256
bf5a377899f6233ee48281997d6c23ae42f78319f6368e946ffa78de01fa307d

SHA512
9d88d1455ad1760a60fca2951209bfed16ee9b7b171d7a7e1f7460325aa16b32dfbd0a3e3c943b77d5820ce52e769672d7bb4109e01687064428e330e670cd2d

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
935KB

MD5
24a3d9e65e52ca7808b8b54f4fd49293

SHA1
ba8ba4083f5f9e2f638f972c077c7358dd4db546

SHA256
bf5a377899f6233ee48281997d6c23ae42f78319f6368e946ffa78de01fa307d

SHA512
9d88d1455ad1760a60fca2951209bfed16ee9b7b171d7a7e1f7460325aa16b32dfbd0a3e3c943b77d5820ce52e769672d7bb4109e01687064428e330e670cd2d

Download Submit
\Users\Admin\AppData\Roaming\oos.exe
Filesize
935KB

MD5
24a3d9e65e52ca7808b8b54f4fd49293

SHA1
ba8ba4083f5f9e2f638f972c077c7358dd4db546

SHA256
bf5a377899f6233ee48281997d6c23ae42f78319f6368e946ffa78de01fa307d

SHA512
9d88d1455ad1760a60fca2951209bfed16ee9b7b171d7a7e1f7460325aa16b32dfbd0a3e3c943b77d5820ce52e769672d7bb4109e01687064428e330e670cd2d

Download Submit
\Users\Admin\AppData\Roaming\oos.exe
Filesize
935KB

MD5
24a3d9e65e52ca7808b8b54f4fd49293

SHA1
ba8ba4083f5f9e2f638f972c077c7358dd4db546

SHA256
bf5a377899f6233ee48281997d6c23ae42f78319f6368e946ffa78de01fa307d

SHA512
9d88d1455ad1760a60fca2951209bfed16ee9b7b171d7a7e1f7460325aa16b32dfbd0a3e3c943b77d5820ce52e769672d7bb4109e01687064428e330e670cd2d

Download Submit
memory/268-76-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/268-63-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/268-68-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/268-70-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/268-72-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/268-73-0x000000000043168C-mapping.dmp

Download
memory/268-67-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/268-61-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/268-78-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/268-66-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/268-60-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/268-65-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/360-81-0x0000000000000000-mapping.dmp

Download
memory/1212-77-0x0000000000000000-mapping.dmp

Download
memory/1284-54-0x0000000000B40000-0x0000000000C30000-memory.dmp

Filesize
960KB

Download
memory/1284-59-0x0000000004AF0000-0x0000000004B6A000-memory.dmp

Filesize
488KB

Download
memory/1284-58-0x0000000008100000-0x00000000081B0000-memory.dmp

Filesize
704KB

Download
memory/1284-57-0x00000000004E0000-0x00000000004F6000-memory.dmp

Filesize
88KB

Download
memory/1284-56-0x0000000005110000-0x00000000051F4000-memory.dmp

Filesize
912KB

Download
memory/1284-55-0x00000000762E1000-0x00000000762E3000-memory.dmp

Filesize
8KB

Download
memory/1416-85-0x0000000000000000-mapping.dmp

Download
memory/1416-87-0x0000000000380000-0x0000000000470000-memory.dmp

Filesize
960KB

Download