remcos | 3b1b352f3c4d0fe235b45d9db418e1e4155ab31265ee368ed646ac38071a2eda

General

Target

DHL AWD 3374687886,pdf.exe
Size

902KB
MD5

1a5c59aeb8ec99b73bc89056e63805c0
SHA1

25602dcef8fb46b22e954f225483f3e3617a0261
SHA256

3b1b352f3c4d0fe235b45d9db418e1e4155ab31265ee368ed646ac38071a2eda
SHA512

a021ff6a08bf44ec06c8e884d2dca83eb161a86e8a8b638a19274e8900746a63a8219271f030c336eb3db61d8765da60a853a21785ef35ec4314f81bcd130a6c

Score

10^/10

remcos persistence rat

Malware Config

Extracted

Family

remcos

C2

favour2021.ddns.net:1990

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

1028 remcos.exe
1528 remcos.exe
Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

916 cmd.exe

pid	process
1028	remcos.exe
1528	remcos.exe

pid	process
916	cmd.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

DHL AWD 3374687886,pdf.exeremcos.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\	DHL AWD 3374687886,pdf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remcos\\remcos.exe\""	DHL AWD 3374687886,pdf.exe
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\	remcos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remcos\\remcos.exe\""	remcos.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

DHL AWD 3374687886,pdf.exeremcos.exe

description	pid	process	target process
PID 932 set thread context of 1692	932	DHL AWD 3374687886,pdf.exe	DHL AWD 3374687886,pdf.exe
PID 1028 set thread context of 1528	1028	remcos.exe	remcos.exe

Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exeschtasks.exe

pid process

1348 schtasks.exe
672 schtasks.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

remcos.exe

pid process

1028 remcos.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

remcos.exe

description pid process

Token: SeDebugPrivilege 1028 remcos.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

remcos.exe

pid process

1528 remcos.exe

pid	process
1348	schtasks.exe
672	schtasks.exe

pid	process
1028	remcos.exe

description	pid	process
Token: SeDebugPrivilege	1028	remcos.exe

pid	process
1528	remcos.exe

Suspicious use of WriteProcessMemory 42 IoCs

Processes:

DHL AWD 3374687886,pdf.exeDHL AWD 3374687886,pdf.exeWScript.execmd.exeremcos.exe

description	pid	process	target process
PID 932 wrote to memory of 1348	932	DHL AWD 3374687886,pdf.exe	schtasks.exe
PID 932 wrote to memory of 1348	932	DHL AWD 3374687886,pdf.exe	schtasks.exe
PID 932 wrote to memory of 1348	932	DHL AWD 3374687886,pdf.exe	schtasks.exe
PID 932 wrote to memory of 1348	932	DHL AWD 3374687886,pdf.exe	schtasks.exe
PID 932 wrote to memory of 1692	932	DHL AWD 3374687886,pdf.exe	DHL AWD 3374687886,pdf.exe
PID 932 wrote to memory of 1692	932	DHL AWD 3374687886,pdf.exe	DHL AWD 3374687886,pdf.exe
PID 932 wrote to memory of 1692	932	DHL AWD 3374687886,pdf.exe	DHL AWD 3374687886,pdf.exe
PID 932 wrote to memory of 1692	932	DHL AWD 3374687886,pdf.exe	DHL AWD 3374687886,pdf.exe
PID 932 wrote to memory of 1692	932	DHL AWD 3374687886,pdf.exe	DHL AWD 3374687886,pdf.exe
PID 932 wrote to memory of 1692	932	DHL AWD 3374687886,pdf.exe	DHL AWD 3374687886,pdf.exe
PID 932 wrote to memory of 1692	932	DHL AWD 3374687886,pdf.exe	DHL AWD 3374687886,pdf.exe
PID 932 wrote to memory of 1692	932	DHL AWD 3374687886,pdf.exe	DHL AWD 3374687886,pdf.exe
PID 932 wrote to memory of 1692	932	DHL AWD 3374687886,pdf.exe	DHL AWD 3374687886,pdf.exe
PID 932 wrote to memory of 1692	932	DHL AWD 3374687886,pdf.exe	DHL AWD 3374687886,pdf.exe
PID 932 wrote to memory of 1692	932	DHL AWD 3374687886,pdf.exe	DHL AWD 3374687886,pdf.exe
PID 1692 wrote to memory of 568	1692	DHL AWD 3374687886,pdf.exe	WScript.exe
PID 1692 wrote to memory of 568	1692	DHL AWD 3374687886,pdf.exe	WScript.exe
PID 1692 wrote to memory of 568	1692	DHL AWD 3374687886,pdf.exe	WScript.exe
PID 1692 wrote to memory of 568	1692	DHL AWD 3374687886,pdf.exe	WScript.exe
PID 568 wrote to memory of 916	568	WScript.exe	cmd.exe
PID 568 wrote to memory of 916	568	WScript.exe	cmd.exe
PID 568 wrote to memory of 916	568	WScript.exe	cmd.exe
PID 568 wrote to memory of 916	568	WScript.exe	cmd.exe
PID 916 wrote to memory of 1028	916	cmd.exe	remcos.exe
PID 916 wrote to memory of 1028	916	cmd.exe	remcos.exe
PID 916 wrote to memory of 1028	916	cmd.exe	remcos.exe
PID 916 wrote to memory of 1028	916	cmd.exe	remcos.exe
PID 1028 wrote to memory of 672	1028	remcos.exe	schtasks.exe
PID 1028 wrote to memory of 672	1028	remcos.exe	schtasks.exe
PID 1028 wrote to memory of 672	1028	remcos.exe	schtasks.exe
PID 1028 wrote to memory of 672	1028	remcos.exe	schtasks.exe
PID 1028 wrote to memory of 1528	1028	remcos.exe	remcos.exe
PID 1028 wrote to memory of 1528	1028	remcos.exe	remcos.exe
PID 1028 wrote to memory of 1528	1028	remcos.exe	remcos.exe
PID 1028 wrote to memory of 1528	1028	remcos.exe	remcos.exe
PID 1028 wrote to memory of 1528	1028	remcos.exe	remcos.exe
PID 1028 wrote to memory of 1528	1028	remcos.exe	remcos.exe
PID 1028 wrote to memory of 1528	1028	remcos.exe	remcos.exe
PID 1028 wrote to memory of 1528	1028	remcos.exe	remcos.exe
PID 1028 wrote to memory of 1528	1028	remcos.exe	remcos.exe
PID 1028 wrote to memory of 1528	1028	remcos.exe	remcos.exe
PID 1028 wrote to memory of 1528	1028	remcos.exe	remcos.exe

C:\Users\Admin\AppData\Local\Temp\DHL AWD 3374687886,pdf.exe
"C:\Users\Admin\AppData\Local\Temp\DHL AWD 3374687886,pdf.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:932

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\IdXhNheuy" /XML "C:\Users\Admin\AppData\Local\Temp\tmp1999.tmp"
2⤵
- Creates scheduled task(s)
PID:1348

C:\Users\Admin\AppData\Local\Temp\DHL AWD 3374687886,pdf.exe
"C:\Users\Admin\AppData\Local\Temp\DHL AWD 3374687886,pdf.exe"
2⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1692

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
3⤵
- Suspicious use of WriteProcessMemory
PID:568

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:916

C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1028

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\IdXhNheuy" /XML "C:\Users\Admin\AppData\Local\Temp\tmp17F4.tmp"
6⤵
- Creates scheduled task(s)
PID:672

C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
"C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe"
6⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetWindowsHookEx
PID:1528

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Registry Run Keys / Startup Folder

1

T1060

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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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\Local\Temp\tmp17F4.tmp
MD5
595132f2368335b6f4baeb58ffba6b30

SHA1
25c7ad6d3e6615c792de32f16fd26ea709aaec9e

SHA256
45097fd20bdaf2fb6f376af1333365cfa63cd7a79701abe85b8db43d4b674277

SHA512
58e9eecfb9b22e6d2e2507b3ed6370deda2f8c790b0a74869abdfaf2652f91fd4b8517a8ecc872c63ecd94338f914602e90df08dd7ecb1ee44eaad85571b36eb

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp1999.tmp
MD5
595132f2368335b6f4baeb58ffba6b30

SHA1
25c7ad6d3e6615c792de32f16fd26ea709aaec9e

SHA256
45097fd20bdaf2fb6f376af1333365cfa63cd7a79701abe85b8db43d4b674277

SHA512
58e9eecfb9b22e6d2e2507b3ed6370deda2f8c790b0a74869abdfaf2652f91fd4b8517a8ecc872c63ecd94338f914602e90df08dd7ecb1ee44eaad85571b36eb

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
1a5c59aeb8ec99b73bc89056e63805c0

SHA1
25602dcef8fb46b22e954f225483f3e3617a0261

SHA256
3b1b352f3c4d0fe235b45d9db418e1e4155ab31265ee368ed646ac38071a2eda

SHA512
a021ff6a08bf44ec06c8e884d2dca83eb161a86e8a8b638a19274e8900746a63a8219271f030c336eb3db61d8765da60a853a21785ef35ec4314f81bcd130a6c

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
1a5c59aeb8ec99b73bc89056e63805c0

SHA1
25602dcef8fb46b22e954f225483f3e3617a0261

SHA256
3b1b352f3c4d0fe235b45d9db418e1e4155ab31265ee368ed646ac38071a2eda

SHA512
a021ff6a08bf44ec06c8e884d2dca83eb161a86e8a8b638a19274e8900746a63a8219271f030c336eb3db61d8765da60a853a21785ef35ec4314f81bcd130a6c

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
1a5c59aeb8ec99b73bc89056e63805c0

SHA1
25602dcef8fb46b22e954f225483f3e3617a0261

SHA256
3b1b352f3c4d0fe235b45d9db418e1e4155ab31265ee368ed646ac38071a2eda

SHA512
a021ff6a08bf44ec06c8e884d2dca83eb161a86e8a8b638a19274e8900746a63a8219271f030c336eb3db61d8765da60a853a21785ef35ec4314f81bcd130a6c

Download Submit
\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
1a5c59aeb8ec99b73bc89056e63805c0

SHA1
25602dcef8fb46b22e954f225483f3e3617a0261

SHA256
3b1b352f3c4d0fe235b45d9db418e1e4155ab31265ee368ed646ac38071a2eda

SHA512
a021ff6a08bf44ec06c8e884d2dca83eb161a86e8a8b638a19274e8900746a63a8219271f030c336eb3db61d8765da60a853a21785ef35ec4314f81bcd130a6c

Download Submit
memory/568-12-0x0000000000000000-mapping.dmp

Download
memory/568-15-0x0000000002760000-0x0000000002764000-memory.dmp

Filesize
16KB

Download
memory/672-25-0x0000000000000000-mapping.dmp

Download
memory/916-14-0x0000000000000000-mapping.dmp

Download
memory/932-2-0x0000000074120000-0x000000007480E000-memory.dmp

Filesize
6.9MB

Download
memory/932-6-0x0000000004CD0000-0x0000000004D28000-memory.dmp

Filesize
352KB

Download
memory/932-5-0x00000000002A0000-0x00000000002B2000-memory.dmp

Filesize
72KB

Download
memory/932-3-0x0000000001360000-0x0000000001361000-memory.dmp

Filesize
4KB

Download
memory/1028-21-0x0000000000C70000-0x0000000000C71000-memory.dmp

Filesize
4KB

Download
memory/1028-18-0x0000000000000000-mapping.dmp

Download
memory/1028-20-0x00000000734A0000-0x0000000073B8E000-memory.dmp

Filesize
6.9MB

Download
memory/1348-7-0x0000000000000000-mapping.dmp

Download
memory/1528-30-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1528-28-0x0000000000413FA4-mapping.dmp

Download
memory/1692-11-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1692-10-0x0000000000413FA4-mapping.dmp

Download
memory/1692-9-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads