remcos | af0249150bee4fec74c124f89019cd260c9aacd7b7a7715192b5097f1948eb82

Analysis

max time kernel
79s
max time network
18s
platform
windows7_x64
resource
win7v20210408
submitted
24-04-2021 07:39

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General

Target

53d1fe3209497d194e38201deb835924.exe
Size

2.1MB
MD5

53d1fe3209497d194e38201deb835924
SHA1

43f4315a82d7cd359aec38eac9fa37602d8baac6
SHA256

af0249150bee4fec74c124f89019cd260c9aacd7b7a7715192b5097f1948eb82
SHA512

a706c677811bc7b5b0368c840c00499b45c3f30e3b52350373e4475bfe90c8bfceee57100d28dece8ec3006382a0be5a8ae780e1c1d71acf43208301200128a2

Score

10^/10

remcos persistence rat

Malware Config

Extracted

Family

remcos

fieldsdegreenf.duckdns.org:6553

aaeeerbbbeee.duckdns.org:6553

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Executes dropped EXE 6 IoCs

Processes:

remcos.exeremcos.exeremcos.exeremcos.exeremcos.exeremcos.exe

pid process

112 remcos.exe
1932 remcos.exe
900 remcos.exe
1752 remcos.exe
1344 remcos.exe
1544 remcos.exe
Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

544 cmd.exe

pid	process
112	remcos.exe
1932	remcos.exe
900	remcos.exe
1752	remcos.exe
1344	remcos.exe
1544	remcos.exe

pid	process
544	cmd.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

53d1fe3209497d194e38201deb835924.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Windows\CurrentVersion\Run\	53d1fe3209497d194e38201deb835924.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\""	53d1fe3209497d194e38201deb835924.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

53d1fe3209497d194e38201deb835924.exe

description pid process target process

PID 1632 set thread context of 592 1632 53d1fe3209497d194e38201deb835924.exe 53d1fe3209497d194e38201deb835924.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 6 IoCs

Processes:

remcos.exe

pid process

112 remcos.exe
112 remcos.exe
112 remcos.exe
112 remcos.exe
112 remcos.exe
112 remcos.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

remcos.exe

description pid process

Token: SeDebugPrivilege 112 remcos.exe

description	pid	process	target process
PID 1632 set thread context of 592	1632	53d1fe3209497d194e38201deb835924.exe	53d1fe3209497d194e38201deb835924.exe

pid	process
112	remcos.exe
112	remcos.exe
112	remcos.exe
112	remcos.exe
112	remcos.exe
112	remcos.exe

description	pid	process
Token: SeDebugPrivilege	112	remcos.exe

Suspicious use of WriteProcessMemory 45 IoCs

Processes:

53d1fe3209497d194e38201deb835924.exe53d1fe3209497d194e38201deb835924.exeWScript.execmd.exeremcos.exe

description	pid	process	target process
PID 1632 wrote to memory of 592	1632	53d1fe3209497d194e38201deb835924.exe	53d1fe3209497d194e38201deb835924.exe
PID 1632 wrote to memory of 592	1632	53d1fe3209497d194e38201deb835924.exe	53d1fe3209497d194e38201deb835924.exe
PID 1632 wrote to memory of 592	1632	53d1fe3209497d194e38201deb835924.exe	53d1fe3209497d194e38201deb835924.exe
PID 1632 wrote to memory of 592	1632	53d1fe3209497d194e38201deb835924.exe	53d1fe3209497d194e38201deb835924.exe
PID 1632 wrote to memory of 592	1632	53d1fe3209497d194e38201deb835924.exe	53d1fe3209497d194e38201deb835924.exe
PID 1632 wrote to memory of 592	1632	53d1fe3209497d194e38201deb835924.exe	53d1fe3209497d194e38201deb835924.exe
PID 1632 wrote to memory of 592	1632	53d1fe3209497d194e38201deb835924.exe	53d1fe3209497d194e38201deb835924.exe
PID 1632 wrote to memory of 592	1632	53d1fe3209497d194e38201deb835924.exe	53d1fe3209497d194e38201deb835924.exe
PID 1632 wrote to memory of 592	1632	53d1fe3209497d194e38201deb835924.exe	53d1fe3209497d194e38201deb835924.exe
PID 1632 wrote to memory of 592	1632	53d1fe3209497d194e38201deb835924.exe	53d1fe3209497d194e38201deb835924.exe
PID 1632 wrote to memory of 592	1632	53d1fe3209497d194e38201deb835924.exe	53d1fe3209497d194e38201deb835924.exe
PID 1632 wrote to memory of 592	1632	53d1fe3209497d194e38201deb835924.exe	53d1fe3209497d194e38201deb835924.exe
PID 1632 wrote to memory of 592	1632	53d1fe3209497d194e38201deb835924.exe	53d1fe3209497d194e38201deb835924.exe
PID 592 wrote to memory of 1732	592	53d1fe3209497d194e38201deb835924.exe	WScript.exe
PID 592 wrote to memory of 1732	592	53d1fe3209497d194e38201deb835924.exe	WScript.exe
PID 592 wrote to memory of 1732	592	53d1fe3209497d194e38201deb835924.exe	WScript.exe
PID 592 wrote to memory of 1732	592	53d1fe3209497d194e38201deb835924.exe	WScript.exe
PID 1732 wrote to memory of 544	1732	WScript.exe	cmd.exe
PID 1732 wrote to memory of 544	1732	WScript.exe	cmd.exe
PID 1732 wrote to memory of 544	1732	WScript.exe	cmd.exe
PID 1732 wrote to memory of 544	1732	WScript.exe	cmd.exe
PID 544 wrote to memory of 112	544	cmd.exe	remcos.exe
PID 544 wrote to memory of 112	544	cmd.exe	remcos.exe
PID 544 wrote to memory of 112	544	cmd.exe	remcos.exe
PID 544 wrote to memory of 112	544	cmd.exe	remcos.exe
PID 112 wrote to memory of 1932	112	remcos.exe	remcos.exe
PID 112 wrote to memory of 1932	112	remcos.exe	remcos.exe
PID 112 wrote to memory of 1932	112	remcos.exe	remcos.exe
PID 112 wrote to memory of 1932	112	remcos.exe	remcos.exe
PID 112 wrote to memory of 900	112	remcos.exe	remcos.exe
PID 112 wrote to memory of 900	112	remcos.exe	remcos.exe
PID 112 wrote to memory of 900	112	remcos.exe	remcos.exe
PID 112 wrote to memory of 900	112	remcos.exe	remcos.exe
PID 112 wrote to memory of 1752	112	remcos.exe	remcos.exe
PID 112 wrote to memory of 1752	112	remcos.exe	remcos.exe
PID 112 wrote to memory of 1752	112	remcos.exe	remcos.exe
PID 112 wrote to memory of 1752	112	remcos.exe	remcos.exe
PID 112 wrote to memory of 1344	112	remcos.exe	remcos.exe
PID 112 wrote to memory of 1344	112	remcos.exe	remcos.exe
PID 112 wrote to memory of 1344	112	remcos.exe	remcos.exe
PID 112 wrote to memory of 1344	112	remcos.exe	remcos.exe
PID 112 wrote to memory of 1544	112	remcos.exe	remcos.exe
PID 112 wrote to memory of 1544	112	remcos.exe	remcos.exe
PID 112 wrote to memory of 1544	112	remcos.exe	remcos.exe
PID 112 wrote to memory of 1544	112	remcos.exe	remcos.exe

C:\Users\Admin\AppData\Local\Temp\53d1fe3209497d194e38201deb835924.exe
"C:\Users\Admin\AppData\Local\Temp\53d1fe3209497d194e38201deb835924.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1632

C:\Users\Admin\AppData\Local\Temp\53d1fe3209497d194e38201deb835924.exe
"{path}"
2⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:592

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
3⤵
- Suspicious use of WriteProcessMemory
PID:1732

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:544

C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
5⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:112

C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
"{path}"
6⤵
- Executes dropped EXE
PID:1932

C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
"{path}"
6⤵
- Executes dropped EXE
PID:1544

C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
"{path}"
6⤵
- Executes dropped EXE
PID:1344

C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
"{path}"
6⤵
- Executes dropped EXE
PID:1752

C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
"{path}"
6⤵
- Executes dropped EXE
PID:900

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
MD5
b92d64fe5b1d1f59df4b738262aea8df

SHA1
c8fb1981759c2d9bb2ec91b705985fba5fc7af63

SHA256
fa20e9aab03dc8e9f1910aaf0cf42662379fa16ae3a22642084fb97fa3d4f83a

SHA512
2566248b93c0cfb0414f033b8dd18bbd4f88180093eac2861107289bcb4ee160f9593706ff1f7d1f2e4ecea430d67a5a2897551a4f9ebd82b707243e300520e2

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
53d1fe3209497d194e38201deb835924

SHA1
43f4315a82d7cd359aec38eac9fa37602d8baac6

SHA256
af0249150bee4fec74c124f89019cd260c9aacd7b7a7715192b5097f1948eb82

SHA512
a706c677811bc7b5b0368c840c00499b45c3f30e3b52350373e4475bfe90c8bfceee57100d28dece8ec3006382a0be5a8ae780e1c1d71acf43208301200128a2

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
53d1fe3209497d194e38201deb835924

SHA1
43f4315a82d7cd359aec38eac9fa37602d8baac6

SHA256
af0249150bee4fec74c124f89019cd260c9aacd7b7a7715192b5097f1948eb82

SHA512
a706c677811bc7b5b0368c840c00499b45c3f30e3b52350373e4475bfe90c8bfceee57100d28dece8ec3006382a0be5a8ae780e1c1d71acf43208301200128a2

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
53d1fe3209497d194e38201deb835924

SHA1
43f4315a82d7cd359aec38eac9fa37602d8baac6

SHA256
af0249150bee4fec74c124f89019cd260c9aacd7b7a7715192b5097f1948eb82

SHA512
a706c677811bc7b5b0368c840c00499b45c3f30e3b52350373e4475bfe90c8bfceee57100d28dece8ec3006382a0be5a8ae780e1c1d71acf43208301200128a2

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
53d1fe3209497d194e38201deb835924

SHA1
43f4315a82d7cd359aec38eac9fa37602d8baac6

SHA256
af0249150bee4fec74c124f89019cd260c9aacd7b7a7715192b5097f1948eb82

SHA512
a706c677811bc7b5b0368c840c00499b45c3f30e3b52350373e4475bfe90c8bfceee57100d28dece8ec3006382a0be5a8ae780e1c1d71acf43208301200128a2

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
53d1fe3209497d194e38201deb835924

SHA1
43f4315a82d7cd359aec38eac9fa37602d8baac6

SHA256
af0249150bee4fec74c124f89019cd260c9aacd7b7a7715192b5097f1948eb82

SHA512
a706c677811bc7b5b0368c840c00499b45c3f30e3b52350373e4475bfe90c8bfceee57100d28dece8ec3006382a0be5a8ae780e1c1d71acf43208301200128a2

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
53d1fe3209497d194e38201deb835924

SHA1
43f4315a82d7cd359aec38eac9fa37602d8baac6

SHA256
af0249150bee4fec74c124f89019cd260c9aacd7b7a7715192b5097f1948eb82

SHA512
a706c677811bc7b5b0368c840c00499b45c3f30e3b52350373e4475bfe90c8bfceee57100d28dece8ec3006382a0be5a8ae780e1c1d71acf43208301200128a2

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
53d1fe3209497d194e38201deb835924

SHA1
43f4315a82d7cd359aec38eac9fa37602d8baac6

SHA256
af0249150bee4fec74c124f89019cd260c9aacd7b7a7715192b5097f1948eb82

SHA512
a706c677811bc7b5b0368c840c00499b45c3f30e3b52350373e4475bfe90c8bfceee57100d28dece8ec3006382a0be5a8ae780e1c1d71acf43208301200128a2

Download Submit
\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
53d1fe3209497d194e38201deb835924

SHA1
43f4315a82d7cd359aec38eac9fa37602d8baac6

SHA256
af0249150bee4fec74c124f89019cd260c9aacd7b7a7715192b5097f1948eb82

SHA512
a706c677811bc7b5b0368c840c00499b45c3f30e3b52350373e4475bfe90c8bfceee57100d28dece8ec3006382a0be5a8ae780e1c1d71acf43208301200128a2

Download Submit
memory/112-80-0x00000000049C0000-0x00000000049C1000-memory.dmp

Filesize
4KB

Download
memory/112-78-0x0000000000240000-0x0000000000241000-memory.dmp

Filesize
4KB

Download
memory/112-76-0x0000000000000000-mapping.dmp

Download
memory/544-73-0x0000000000000000-mapping.dmp

Download
memory/592-66-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/592-72-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/592-68-0x0000000075551000-0x0000000075553000-memory.dmp

Filesize
8KB

Download
memory/592-67-0x000000000042EEEF-mapping.dmp

Download
memory/1632-60-0x0000000000EA0000-0x0000000000EA1000-memory.dmp

Filesize
4KB

Download
memory/1632-65-0x0000000006310000-0x0000000006384000-memory.dmp

Filesize
464KB

Download
memory/1632-64-0x00000000094D0000-0x000000000957B000-memory.dmp

Filesize
684KB

Download
memory/1632-63-0x00000000009A0000-0x00000000009AE000-memory.dmp

Filesize
56KB

Download
memory/1632-62-0x0000000004E10000-0x0000000004E11000-memory.dmp

Filesize
4KB

Download
memory/1732-69-0x0000000000000000-mapping.dmp

Download