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

2108 remcos.exe
2468 remcos.exe

pid	process
2108	remcos.exe
2468	remcos.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

remcos.exeDHL AWD 3374687886,pdf.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remcos\\remcos.exe\""	remcos.exe
Key created	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\	DHL AWD 3374687886,pdf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remcos\\remcos.exe\""	DHL AWD 3374687886,pdf.exe
Key created	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\	remcos.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

DHL AWD 3374687886,pdf.exeremcos.exe

description	pid	process	target process
PID 4048 set thread context of 3172	4048	DHL AWD 3374687886,pdf.exe	DHL AWD 3374687886,pdf.exe
PID 2108 set thread context of 2468	2108	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

3096 schtasks.exe
1328 schtasks.exe
Modifies registry class 1 IoCs

Processes:

DHL AWD 3374687886,pdf.exe

description ioc process

Key created \REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000_Classes\Local Settings DHL AWD 3374687886,pdf.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

DHL AWD 3374687886,pdf.exeremcos.exe

pid process

4048 DHL AWD 3374687886,pdf.exe
2108 remcos.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

DHL AWD 3374687886,pdf.exeremcos.exe

description pid process

Token: SeDebugPrivilege 4048 DHL AWD 3374687886,pdf.exe
Token: SeDebugPrivilege 2108 remcos.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

remcos.exe

pid process

2468 remcos.exe

pid	process
3096	schtasks.exe
1328	schtasks.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000_Classes\Local Settings	DHL AWD 3374687886,pdf.exe

pid	process
4048	DHL AWD 3374687886,pdf.exe
2108	remcos.exe

description	pid	process
Token: SeDebugPrivilege	4048	DHL AWD 3374687886,pdf.exe
Token: SeDebugPrivilege	2108	remcos.exe

pid	process
2468	remcos.exe

Suspicious use of WriteProcessMemory 35 IoCs

Processes:

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

description	pid	process	target process
PID 4048 wrote to memory of 3096	4048	DHL AWD 3374687886,pdf.exe	schtasks.exe
PID 4048 wrote to memory of 3096	4048	DHL AWD 3374687886,pdf.exe	schtasks.exe
PID 4048 wrote to memory of 3096	4048	DHL AWD 3374687886,pdf.exe	schtasks.exe
PID 4048 wrote to memory of 3172	4048	DHL AWD 3374687886,pdf.exe	DHL AWD 3374687886,pdf.exe
PID 4048 wrote to memory of 3172	4048	DHL AWD 3374687886,pdf.exe	DHL AWD 3374687886,pdf.exe
PID 4048 wrote to memory of 3172	4048	DHL AWD 3374687886,pdf.exe	DHL AWD 3374687886,pdf.exe
PID 4048 wrote to memory of 3172	4048	DHL AWD 3374687886,pdf.exe	DHL AWD 3374687886,pdf.exe
PID 4048 wrote to memory of 3172	4048	DHL AWD 3374687886,pdf.exe	DHL AWD 3374687886,pdf.exe
PID 4048 wrote to memory of 3172	4048	DHL AWD 3374687886,pdf.exe	DHL AWD 3374687886,pdf.exe
PID 4048 wrote to memory of 3172	4048	DHL AWD 3374687886,pdf.exe	DHL AWD 3374687886,pdf.exe
PID 4048 wrote to memory of 3172	4048	DHL AWD 3374687886,pdf.exe	DHL AWD 3374687886,pdf.exe
PID 4048 wrote to memory of 3172	4048	DHL AWD 3374687886,pdf.exe	DHL AWD 3374687886,pdf.exe
PID 4048 wrote to memory of 3172	4048	DHL AWD 3374687886,pdf.exe	DHL AWD 3374687886,pdf.exe
PID 3172 wrote to memory of 3132	3172	DHL AWD 3374687886,pdf.exe	WScript.exe
PID 3172 wrote to memory of 3132	3172	DHL AWD 3374687886,pdf.exe	WScript.exe
PID 3172 wrote to memory of 3132	3172	DHL AWD 3374687886,pdf.exe	WScript.exe
PID 3132 wrote to memory of 1388	3132	WScript.exe	cmd.exe
PID 3132 wrote to memory of 1388	3132	WScript.exe	cmd.exe
PID 3132 wrote to memory of 1388	3132	WScript.exe	cmd.exe
PID 1388 wrote to memory of 2108	1388	cmd.exe	remcos.exe
PID 1388 wrote to memory of 2108	1388	cmd.exe	remcos.exe
PID 1388 wrote to memory of 2108	1388	cmd.exe	remcos.exe
PID 2108 wrote to memory of 1328	2108	remcos.exe	schtasks.exe
PID 2108 wrote to memory of 1328	2108	remcos.exe	schtasks.exe
PID 2108 wrote to memory of 1328	2108	remcos.exe	schtasks.exe
PID 2108 wrote to memory of 2468	2108	remcos.exe	remcos.exe
PID 2108 wrote to memory of 2468	2108	remcos.exe	remcos.exe
PID 2108 wrote to memory of 2468	2108	remcos.exe	remcos.exe
PID 2108 wrote to memory of 2468	2108	remcos.exe	remcos.exe
PID 2108 wrote to memory of 2468	2108	remcos.exe	remcos.exe
PID 2108 wrote to memory of 2468	2108	remcos.exe	remcos.exe
PID 2108 wrote to memory of 2468	2108	remcos.exe	remcos.exe
PID 2108 wrote to memory of 2468	2108	remcos.exe	remcos.exe
PID 2108 wrote to memory of 2468	2108	remcos.exe	remcos.exe
PID 2108 wrote to memory of 2468	2108	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 behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4048

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\IdXhNheuy" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2B37.tmp"
2⤵
- Creates scheduled task(s)
PID:3096

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
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:3172

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
3⤵
- Suspicious use of WriteProcessMemory
PID:3132

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe"
4⤵
- Suspicious use of WriteProcessMemory
PID:1388

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:2108

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\IdXhNheuy" /XML "C:\Users\Admin\AppData\Local\Temp\tmp3B6F.tmp"
6⤵
- Creates scheduled task(s)
PID:1328

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:2468

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\tmp2B37.tmp
MD5
2c0cfda07993c3dc90465605d216a807

SHA1
439e58800a886267d46a64b7d6c78691ea8f79b8

SHA256
f7eee675c343733b757ba7f6a1e0998ad9fa105e55c8c23eb1160ec9b5b15111

SHA512
917396facb0386e6537152684db9b85dff8df545ac4c684e3a8d4e25c4351ea2efd2f1ca8c0023b749c968f15f5bd8f95f8043424000fd6c1077839a9b3f2f37

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp3B6F.tmp
MD5
2c0cfda07993c3dc90465605d216a807

SHA1
439e58800a886267d46a64b7d6c78691ea8f79b8

SHA256
f7eee675c343733b757ba7f6a1e0998ad9fa105e55c8c23eb1160ec9b5b15111

SHA512
917396facb0386e6537152684db9b85dff8df545ac4c684e3a8d4e25c4351ea2efd2f1ca8c0023b749c968f15f5bd8f95f8043424000fd6c1077839a9b3f2f37

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
memory/1328-33-0x0000000000000000-mapping.dmp

Download
memory/1388-19-0x0000000000000000-mapping.dmp

Download
memory/2108-23-0x0000000073820000-0x0000000073F0E000-memory.dmp

Filesize
6.9MB

Download
memory/2108-20-0x0000000000000000-mapping.dmp

Download
memory/2468-36-0x0000000000413FA4-mapping.dmp

Download
memory/2468-38-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/3096-12-0x0000000000000000-mapping.dmp

Download
memory/3132-17-0x0000000000000000-mapping.dmp

Download
memory/3172-14-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/3172-16-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/3172-15-0x0000000000413FA4-mapping.dmp

Download
memory/4048-2-0x0000000073820000-0x0000000073F0E000-memory.dmp

Filesize
6.9MB

Download
memory/4048-11-0x0000000005E40000-0x0000000005E98000-memory.dmp

Filesize
352KB

Download
memory/4048-10-0x00000000050A0000-0x00000000050B2000-memory.dmp

Filesize
72KB

Download
memory/4048-9-0x0000000005350000-0x0000000005351000-memory.dmp

Filesize
4KB

Download
memory/4048-8-0x0000000005070000-0x0000000005071000-memory.dmp

Filesize
4KB

Download
memory/4048-7-0x0000000005180000-0x0000000005181000-memory.dmp

Filesize
4KB

Download
memory/4048-6-0x0000000005680000-0x0000000005681000-memory.dmp

Filesize
4KB

Download
memory/4048-5-0x00000000050E0000-0x00000000050E1000-memory.dmp

Filesize
4KB

Download
memory/4048-3-0x0000000000640000-0x0000000000641000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads