remcos | 07cb866df6df9ad51ce01426b0a0466834619e72c2653ff7c25320cc3c0a3f9a

General

Target

unpaid.exe
Size

289KB
MD5

23195e221bd52fc2ff7bcecef0c6e9af
SHA1

efffd2231109a8103f1b85da879ee2cfd9e59ba8
SHA256

07cb866df6df9ad51ce01426b0a0466834619e72c2653ff7c25320cc3c0a3f9a
SHA512

8cbb1a709e198e7c905b81554000d83f88e2429c821d5990d45c8f182442e2409828de014750aa2ef23c97f033b0f098bdf281cc8bc7b5c1e7ff53ca7d2dd3c8

Score

10^/10

remcos persistence rat

Malware Config

Extracted

Family

remcos

C2

nkosarevaocs.duckdns.org:7266

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Executes dropped EXE 2 IoCs

Processes:

remcos.exeremcos.exe

pid process

3592 remcos.exe
1096 remcos.exe

pid	process
3592	remcos.exe
1096	remcos.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

remcos.exeunpaid.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\	remcos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remcos\\remcos.exe\""	remcos.exe
Key created	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\	unpaid.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remcos\\remcos.exe\""	unpaid.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

unpaid.exeremcos.exe

description	pid	process	target process
PID 1432 set thread context of 2076	1432	unpaid.exe	unpaid.exe
PID 3592 set thread context of 1096	3592	remcos.exe	remcos.exe

Modifies registry class 1 IoCs

Processes:

unpaid.exe

description ioc process

Key created \REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000_Classes\Local Settings unpaid.exe
Suspicious behavior: MapViewOfSection 3 IoCs

Processes:

unpaid.exeunpaid.exeremcos.exe

pid process

4000 unpaid.exe
1432 unpaid.exe
3592 remcos.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

remcos.exe

pid process

1096 remcos.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000_Classes\Local Settings	unpaid.exe

pid	process
4000	unpaid.exe
1432	unpaid.exe
3592	remcos.exe

pid	process
1096	remcos.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

unpaid.exeunpaid.exeunpaid.exeWScript.execmd.exeremcos.exe

description	pid	process	target process
PID 4000 wrote to memory of 1424	4000	unpaid.exe	unpaid.exe
PID 4000 wrote to memory of 1424	4000	unpaid.exe	unpaid.exe
PID 4000 wrote to memory of 1424	4000	unpaid.exe	unpaid.exe
PID 4000 wrote to memory of 1432	4000	unpaid.exe	unpaid.exe
PID 4000 wrote to memory of 1432	4000	unpaid.exe	unpaid.exe
PID 4000 wrote to memory of 1432	4000	unpaid.exe	unpaid.exe
PID 1432 wrote to memory of 2076	1432	unpaid.exe	unpaid.exe
PID 1432 wrote to memory of 2076	1432	unpaid.exe	unpaid.exe
PID 1432 wrote to memory of 2076	1432	unpaid.exe	unpaid.exe
PID 1432 wrote to memory of 2076	1432	unpaid.exe	unpaid.exe
PID 2076 wrote to memory of 2500	2076	unpaid.exe	WScript.exe
PID 2076 wrote to memory of 2500	2076	unpaid.exe	WScript.exe
PID 2076 wrote to memory of 2500	2076	unpaid.exe	WScript.exe
PID 2500 wrote to memory of 3684	2500	WScript.exe	cmd.exe
PID 2500 wrote to memory of 3684	2500	WScript.exe	cmd.exe
PID 2500 wrote to memory of 3684	2500	WScript.exe	cmd.exe
PID 3684 wrote to memory of 3592	3684	cmd.exe	remcos.exe
PID 3684 wrote to memory of 3592	3684	cmd.exe	remcos.exe
PID 3684 wrote to memory of 3592	3684	cmd.exe	remcos.exe
PID 3592 wrote to memory of 1096	3592	remcos.exe	remcos.exe
PID 3592 wrote to memory of 1096	3592	remcos.exe	remcos.exe
PID 3592 wrote to memory of 1096	3592	remcos.exe	remcos.exe
PID 3592 wrote to memory of 1096	3592	remcos.exe	remcos.exe

C:\Users\Admin\AppData\Local\Temp\unpaid.exe
"C:\Users\Admin\AppData\Local\Temp\unpaid.exe"
1⤵
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4000

C:\Users\Admin\AppData\Local\Temp\unpaid.exe
"C:\Users\Admin\AppData\Local\Temp\unpaid.exe"
2⤵
PID:1424

C:\Users\Admin\AppData\Local\Temp\unpaid.exe
"C:\Users\Admin\AppData\Local\Temp\unpaid.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1432

C:\Users\Admin\AppData\Local\Temp\unpaid.exe
"C:\Users\Admin\AppData\Local\Temp\unpaid.exe"
3⤵
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2076

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
4⤵
- Suspicious use of WriteProcessMemory
PID:2500

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe"
5⤵
- Suspicious use of WriteProcessMemory
PID:3684

C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
6⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3592

C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
7⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetWindowsHookEx
PID:1096

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

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
23195e221bd52fc2ff7bcecef0c6e9af

SHA1
efffd2231109a8103f1b85da879ee2cfd9e59ba8

SHA256
07cb866df6df9ad51ce01426b0a0466834619e72c2653ff7c25320cc3c0a3f9a

SHA512
8cbb1a709e198e7c905b81554000d83f88e2429c821d5990d45c8f182442e2409828de014750aa2ef23c97f033b0f098bdf281cc8bc7b5c1e7ff53ca7d2dd3c8

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
23195e221bd52fc2ff7bcecef0c6e9af

SHA1
efffd2231109a8103f1b85da879ee2cfd9e59ba8

SHA256
07cb866df6df9ad51ce01426b0a0466834619e72c2653ff7c25320cc3c0a3f9a

SHA512
8cbb1a709e198e7c905b81554000d83f88e2429c821d5990d45c8f182442e2409828de014750aa2ef23c97f033b0f098bdf281cc8bc7b5c1e7ff53ca7d2dd3c8

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
23195e221bd52fc2ff7bcecef0c6e9af

SHA1
efffd2231109a8103f1b85da879ee2cfd9e59ba8

SHA256
07cb866df6df9ad51ce01426b0a0466834619e72c2653ff7c25320cc3c0a3f9a

SHA512
8cbb1a709e198e7c905b81554000d83f88e2429c821d5990d45c8f182442e2409828de014750aa2ef23c97f033b0f098bdf281cc8bc7b5c1e7ff53ca7d2dd3c8

Download Submit
memory/1096-11-0x0000000000413FA4-mapping.dmp

Download
memory/1096-13-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1432-2-0x0000000000000000-mapping.dmp

Download
memory/2076-3-0x0000000000413FA4-mapping.dmp

Download
memory/2076-6-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2500-4-0x0000000000000000-mapping.dmp

Download
memory/3592-8-0x0000000000000000-mapping.dmp

Download
memory/3684-7-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads