remcos | 30552657a06df54de322d5d689ca77d2cacbf8e85136ca915843c9a99e4f26c0

General

Target

m1WOP5oC15Xaepo.exe
Size

784KB
MD5

3441e57f22d51b7bc539595450ee1dd6
SHA1

cd77031b1df0ec4e2d10fe4077674783270d6c4e
SHA256

30552657a06df54de322d5d689ca77d2cacbf8e85136ca915843c9a99e4f26c0
SHA512

b05c84cb74ab5cdd17e8778712febb9c193ff29d38b461463f6000723f90040ad531a6274a660c00798c3cf6c31f1b71b4f9f8166be3620c6f569e19f78c066c

Score

10^/10

remcos persistence rat

Malware Config

Extracted

Family

remcos

C2

217.138.212.58:52667

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Executes dropped EXE 1 IoCs

Processes:

remcos.exe

pid process

1844 remcos.exe
Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

592 cmd.exe

pid	process
1844	remcos.exe

pid	process
592	cmd.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

m1WOP5oC15Xaepo.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Windows\CurrentVersion\Run\	m1WOP5oC15Xaepo.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remcos\\remcos.exe\""	m1WOP5oC15Xaepo.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

m1WOP5oC15Xaepo.exe

description pid process target process

PID 1100 set thread context of 1744 1100 m1WOP5oC15Xaepo.exe m1WOP5oC15Xaepo.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:

m1WOP5oC15Xaepo.exepowershell.exe

pid process

1100 m1WOP5oC15Xaepo.exe
1100 m1WOP5oC15Xaepo.exe
1100 m1WOP5oC15Xaepo.exe
568 powershell.exe
568 powershell.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

m1WOP5oC15Xaepo.exepowershell.exe

description pid process

Token: SeDebugPrivilege 1100 m1WOP5oC15Xaepo.exe
Token: SeDebugPrivilege 568 powershell.exe

description	pid	process	target process
PID 1100 set thread context of 1744	1100	m1WOP5oC15Xaepo.exe	m1WOP5oC15Xaepo.exe

pid	process
1100	m1WOP5oC15Xaepo.exe
1100	m1WOP5oC15Xaepo.exe
1100	m1WOP5oC15Xaepo.exe
568	powershell.exe
568	powershell.exe

description	pid	process
Token: SeDebugPrivilege	1100	m1WOP5oC15Xaepo.exe
Token: SeDebugPrivilege	568	powershell.exe

Suspicious use of WriteProcessMemory 29 IoCs

Processes:

m1WOP5oC15Xaepo.exem1WOP5oC15Xaepo.exeWScript.execmd.exe

description	pid	process	target process
PID 1100 wrote to memory of 568	1100	m1WOP5oC15Xaepo.exe	powershell.exe
PID 1100 wrote to memory of 568	1100	m1WOP5oC15Xaepo.exe	powershell.exe
PID 1100 wrote to memory of 568	1100	m1WOP5oC15Xaepo.exe	powershell.exe
PID 1100 wrote to memory of 568	1100	m1WOP5oC15Xaepo.exe	powershell.exe
PID 1100 wrote to memory of 1744	1100	m1WOP5oC15Xaepo.exe	m1WOP5oC15Xaepo.exe
PID 1100 wrote to memory of 1744	1100	m1WOP5oC15Xaepo.exe	m1WOP5oC15Xaepo.exe
PID 1100 wrote to memory of 1744	1100	m1WOP5oC15Xaepo.exe	m1WOP5oC15Xaepo.exe
PID 1100 wrote to memory of 1744	1100	m1WOP5oC15Xaepo.exe	m1WOP5oC15Xaepo.exe
PID 1100 wrote to memory of 1744	1100	m1WOP5oC15Xaepo.exe	m1WOP5oC15Xaepo.exe
PID 1100 wrote to memory of 1744	1100	m1WOP5oC15Xaepo.exe	m1WOP5oC15Xaepo.exe
PID 1100 wrote to memory of 1744	1100	m1WOP5oC15Xaepo.exe	m1WOP5oC15Xaepo.exe
PID 1100 wrote to memory of 1744	1100	m1WOP5oC15Xaepo.exe	m1WOP5oC15Xaepo.exe
PID 1100 wrote to memory of 1744	1100	m1WOP5oC15Xaepo.exe	m1WOP5oC15Xaepo.exe
PID 1100 wrote to memory of 1744	1100	m1WOP5oC15Xaepo.exe	m1WOP5oC15Xaepo.exe
PID 1100 wrote to memory of 1744	1100	m1WOP5oC15Xaepo.exe	m1WOP5oC15Xaepo.exe
PID 1100 wrote to memory of 1744	1100	m1WOP5oC15Xaepo.exe	m1WOP5oC15Xaepo.exe
PID 1100 wrote to memory of 1744	1100	m1WOP5oC15Xaepo.exe	m1WOP5oC15Xaepo.exe
PID 1744 wrote to memory of 1232	1744	m1WOP5oC15Xaepo.exe	WScript.exe
PID 1744 wrote to memory of 1232	1744	m1WOP5oC15Xaepo.exe	WScript.exe
PID 1744 wrote to memory of 1232	1744	m1WOP5oC15Xaepo.exe	WScript.exe
PID 1744 wrote to memory of 1232	1744	m1WOP5oC15Xaepo.exe	WScript.exe
PID 1232 wrote to memory of 592	1232	WScript.exe	cmd.exe
PID 1232 wrote to memory of 592	1232	WScript.exe	cmd.exe
PID 1232 wrote to memory of 592	1232	WScript.exe	cmd.exe
PID 1232 wrote to memory of 592	1232	WScript.exe	cmd.exe
PID 592 wrote to memory of 1844	592	cmd.exe	remcos.exe
PID 592 wrote to memory of 1844	592	cmd.exe	remcos.exe
PID 592 wrote to memory of 1844	592	cmd.exe	remcos.exe
PID 592 wrote to memory of 1844	592	cmd.exe	remcos.exe

C:\Users\Admin\AppData\Local\Temp\m1WOP5oC15Xaepo.exe
"C:\Users\Admin\AppData\Local\Temp\m1WOP5oC15Xaepo.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1100

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\m1WOP5oC15Xaepo.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:568

C:\Users\Admin\AppData\Local\Temp\m1WOP5oC15Xaepo.exe
"C:\Users\Admin\AppData\Local\Temp\m1WOP5oC15Xaepo.exe"
2⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1744

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
3⤵
- Suspicious use of WriteProcessMemory
PID:1232

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe"
4⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:592

C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
5⤵
- Executes dropped EXE
PID:1844

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
MD5
b92d64fe5b1d1f59df4b738262aea8df

SHA1
c8fb1981759c2d9bb2ec91b705985fba5fc7af63

SHA256
fa20e9aab03dc8e9f1910aaf0cf42662379fa16ae3a22642084fb97fa3d4f83a

SHA512
2566248b93c0cfb0414f033b8dd18bbd4f88180093eac2861107289bcb4ee160f9593706ff1f7d1f2e4ecea430d67a5a2897551a4f9ebd82b707243e300520e2

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
3441e57f22d51b7bc539595450ee1dd6

SHA1
cd77031b1df0ec4e2d10fe4077674783270d6c4e

SHA256
30552657a06df54de322d5d689ca77d2cacbf8e85136ca915843c9a99e4f26c0

SHA512
b05c84cb74ab5cdd17e8778712febb9c193ff29d38b461463f6000723f90040ad531a6274a660c00798c3cf6c31f1b71b4f9f8166be3620c6f569e19f78c066c

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
3441e57f22d51b7bc539595450ee1dd6

SHA1
cd77031b1df0ec4e2d10fe4077674783270d6c4e

SHA256
30552657a06df54de322d5d689ca77d2cacbf8e85136ca915843c9a99e4f26c0

SHA512
b05c84cb74ab5cdd17e8778712febb9c193ff29d38b461463f6000723f90040ad531a6274a660c00798c3cf6c31f1b71b4f9f8166be3620c6f569e19f78c066c

Download Submit
\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
3441e57f22d51b7bc539595450ee1dd6

SHA1
cd77031b1df0ec4e2d10fe4077674783270d6c4e

SHA256
30552657a06df54de322d5d689ca77d2cacbf8e85136ca915843c9a99e4f26c0

SHA512
b05c84cb74ab5cdd17e8778712febb9c193ff29d38b461463f6000723f90040ad531a6274a660c00798c3cf6c31f1b71b4f9f8166be3620c6f569e19f78c066c

Download Submit
memory/568-79-0x00000000024D0000-0x00000000024D1000-memory.dmp

Filesize
4KB

Download
memory/568-97-0x00000000060C0000-0x00000000060C1000-memory.dmp

Filesize
4KB

Download
memory/568-122-0x0000000006310000-0x0000000006311000-memory.dmp

Filesize
4KB

Download
memory/568-121-0x0000000006300000-0x0000000006301000-memory.dmp

Filesize
4KB

Download
memory/568-69-0x0000000075DA1000-0x0000000075DA3000-memory.dmp

Filesize
8KB

Download
memory/568-107-0x0000000006220000-0x0000000006221000-memory.dmp

Filesize
4KB

Download
memory/568-106-0x0000000006280000-0x0000000006281000-memory.dmp

Filesize
4KB

Download
memory/568-99-0x0000000006180000-0x0000000006181000-memory.dmp

Filesize
4KB

Download
memory/568-75-0x0000000000E80000-0x0000000000E81000-memory.dmp

Filesize
4KB

Download
memory/568-76-0x0000000004870000-0x0000000004871000-memory.dmp

Filesize
4KB

Download
memory/568-77-0x0000000004830000-0x0000000004831000-memory.dmp

Filesize
4KB

Download
memory/568-78-0x0000000004832000-0x0000000004833000-memory.dmp

Filesize
4KB

Download
memory/568-98-0x000000007EF30000-0x000000007EF31000-memory.dmp

Filesize
4KB

Download
memory/568-66-0x0000000000000000-mapping.dmp

Download
memory/568-92-0x0000000006040000-0x0000000006041000-memory.dmp

Filesize
4KB

Download
memory/568-89-0x0000000005240000-0x0000000005241000-memory.dmp

Filesize
4KB

Download
memory/592-80-0x0000000000000000-mapping.dmp

Download
memory/1100-62-0x0000000000430000-0x000000000043D000-memory.dmp

Filesize
52KB

Download
memory/1100-63-0x0000000000720000-0x0000000000721000-memory.dmp

Filesize
4KB

Download
memory/1100-65-0x00000000076D0000-0x0000000007757000-memory.dmp

Filesize
540KB

Download
memory/1100-60-0x0000000000910000-0x0000000000911000-memory.dmp

Filesize
4KB

Download
memory/1100-64-0x0000000005110000-0x00000000051CD000-memory.dmp

Filesize
756KB

Download
memory/1232-72-0x0000000000000000-mapping.dmp

Download
memory/1744-71-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1744-68-0x000000000042EEEF-mapping.dmp

Download
memory/1744-67-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1844-83-0x0000000000000000-mapping.dmp

Download
memory/1844-88-0x0000000000D30000-0x0000000000D31000-memory.dmp

Filesize
4KB

Download
memory/1844-85-0x00000000012E0000-0x00000000012E1000-memory.dmp

Filesize
4KB

Download

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