remcos | 596479cd77e25e5d6dbf0b421afff049390813cc254ae90f86af00a10bdf6f90

Analysis

max time kernel
148s
max time network
151s
platform
windows10_x64
resource
win10v20201028
submitted
12-01-2021 07:23

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General

Target

i5TiYkAYkWJy1O8.exe
Size

772KB
MD5

e17a0488de5ca3c73672541143ee6927
SHA1

8a4c59f81c17710e665fb3e055dc1cbd28bc8ce6
SHA256

596479cd77e25e5d6dbf0b421afff049390813cc254ae90f86af00a10bdf6f90
SHA512

6766459cca6b6a25902973ca210e274241841e7acd2684ccb3f362040e3dbd568f1b430d305e773e50e0ec1e5e7cd879d8f3aff7d4cc30ce0a786be58555537d

Score

10^/10

remcos persistence rat spyware

Malware Config

Extracted

Family

remcos

185.244.26.208:29100

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Executes dropped EXE 5 IoCs

Processes:

remcos.exeremcos.exeremcos.exeremcos.exeremcos.exe

pid process

1748 remcos.exe
2892 remcos.exe
4088 remcos.exe
4064 remcos.exe
3336 remcos.exe
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware

Data from Local System
T1005

Credentials in Files
T1081

pid	process
1748	remcos.exe
2892	remcos.exe
4088	remcos.exe
4064	remcos.exe
3336	remcos.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

i5TiYkAYkWJy1O8.exeremcos.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\	i5TiYkAYkWJy1O8.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\""	i5TiYkAYkWJy1O8.exe
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

Suspicious use of SetThreadContext 5 IoCs

Processes:

i5TiYkAYkWJy1O8.exeremcos.exeremcos.exe

description	pid	process	target process
PID 4760 set thread context of 908	4760	i5TiYkAYkWJy1O8.exe	i5TiYkAYkWJy1O8.exe
PID 1748 set thread context of 2892	1748	remcos.exe	remcos.exe
PID 2892 set thread context of 4088	2892	remcos.exe	remcos.exe
PID 2892 set thread context of 4064	2892	remcos.exe	remcos.exe
PID 2892 set thread context of 3336	2892	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

2388 schtasks.exe
508 schtasks.exe
Modifies registry class 1 IoCs

Processes:

i5TiYkAYkWJy1O8.exe

description ioc process

Key created \REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000_Classes\Local Settings i5TiYkAYkWJy1O8.exe
Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

i5TiYkAYkWJy1O8.exeremcos.exeremcos.exeremcos.exe

pid process

4760 i5TiYkAYkWJy1O8.exe
1748 remcos.exe
4088 remcos.exe
4088 remcos.exe
4064 remcos.exe
4064 remcos.exe
4088 remcos.exe
4088 remcos.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

i5TiYkAYkWJy1O8.exeremcos.exeremcos.exe

description pid process

Token: SeDebugPrivilege 4760 i5TiYkAYkWJy1O8.exe
Token: SeDebugPrivilege 1748 remcos.exe
Token: SeDebugPrivilege 4064 remcos.exe

pid	process
2388	schtasks.exe
508	schtasks.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000_Classes\Local Settings	i5TiYkAYkWJy1O8.exe

pid	process
4760	i5TiYkAYkWJy1O8.exe
1748	remcos.exe
4088	remcos.exe
4088	remcos.exe
4064	remcos.exe
4064	remcos.exe
4088	remcos.exe
4088	remcos.exe

description	pid	process
Token: SeDebugPrivilege	4760	i5TiYkAYkWJy1O8.exe
Token: SeDebugPrivilege	1748	remcos.exe
Token: SeDebugPrivilege	4064	remcos.exe

Suspicious use of WriteProcessMemory 59 IoCs

Processes:

i5TiYkAYkWJy1O8.exei5TiYkAYkWJy1O8.exeWScript.execmd.exeremcos.exeremcos.exe

description	pid	process	target process
PID 4760 wrote to memory of 508	4760	i5TiYkAYkWJy1O8.exe	schtasks.exe
PID 4760 wrote to memory of 508	4760	i5TiYkAYkWJy1O8.exe	schtasks.exe
PID 4760 wrote to memory of 508	4760	i5TiYkAYkWJy1O8.exe	schtasks.exe
PID 4760 wrote to memory of 908	4760	i5TiYkAYkWJy1O8.exe	i5TiYkAYkWJy1O8.exe
PID 4760 wrote to memory of 908	4760	i5TiYkAYkWJy1O8.exe	i5TiYkAYkWJy1O8.exe
PID 4760 wrote to memory of 908	4760	i5TiYkAYkWJy1O8.exe	i5TiYkAYkWJy1O8.exe
PID 4760 wrote to memory of 908	4760	i5TiYkAYkWJy1O8.exe	i5TiYkAYkWJy1O8.exe
PID 4760 wrote to memory of 908	4760	i5TiYkAYkWJy1O8.exe	i5TiYkAYkWJy1O8.exe
PID 4760 wrote to memory of 908	4760	i5TiYkAYkWJy1O8.exe	i5TiYkAYkWJy1O8.exe
PID 4760 wrote to memory of 908	4760	i5TiYkAYkWJy1O8.exe	i5TiYkAYkWJy1O8.exe
PID 4760 wrote to memory of 908	4760	i5TiYkAYkWJy1O8.exe	i5TiYkAYkWJy1O8.exe
PID 4760 wrote to memory of 908	4760	i5TiYkAYkWJy1O8.exe	i5TiYkAYkWJy1O8.exe
PID 4760 wrote to memory of 908	4760	i5TiYkAYkWJy1O8.exe	i5TiYkAYkWJy1O8.exe
PID 908 wrote to memory of 1168	908	i5TiYkAYkWJy1O8.exe	WScript.exe
PID 908 wrote to memory of 1168	908	i5TiYkAYkWJy1O8.exe	WScript.exe
PID 908 wrote to memory of 1168	908	i5TiYkAYkWJy1O8.exe	WScript.exe
PID 1168 wrote to memory of 1468	1168	WScript.exe	cmd.exe
PID 1168 wrote to memory of 1468	1168	WScript.exe	cmd.exe
PID 1168 wrote to memory of 1468	1168	WScript.exe	cmd.exe
PID 1468 wrote to memory of 1748	1468	cmd.exe	remcos.exe
PID 1468 wrote to memory of 1748	1468	cmd.exe	remcos.exe
PID 1468 wrote to memory of 1748	1468	cmd.exe	remcos.exe
PID 1748 wrote to memory of 2388	1748	remcos.exe	schtasks.exe
PID 1748 wrote to memory of 2388	1748	remcos.exe	schtasks.exe
PID 1748 wrote to memory of 2388	1748	remcos.exe	schtasks.exe
PID 1748 wrote to memory of 2892	1748	remcos.exe	remcos.exe
PID 1748 wrote to memory of 2892	1748	remcos.exe	remcos.exe
PID 1748 wrote to memory of 2892	1748	remcos.exe	remcos.exe
PID 1748 wrote to memory of 2892	1748	remcos.exe	remcos.exe
PID 1748 wrote to memory of 2892	1748	remcos.exe	remcos.exe
PID 1748 wrote to memory of 2892	1748	remcos.exe	remcos.exe
PID 1748 wrote to memory of 2892	1748	remcos.exe	remcos.exe
PID 1748 wrote to memory of 2892	1748	remcos.exe	remcos.exe
PID 1748 wrote to memory of 2892	1748	remcos.exe	remcos.exe
PID 1748 wrote to memory of 2892	1748	remcos.exe	remcos.exe
PID 2892 wrote to memory of 4088	2892	remcos.exe	remcos.exe
PID 2892 wrote to memory of 4088	2892	remcos.exe	remcos.exe
PID 2892 wrote to memory of 4088	2892	remcos.exe	remcos.exe
PID 2892 wrote to memory of 4088	2892	remcos.exe	remcos.exe
PID 2892 wrote to memory of 4088	2892	remcos.exe	remcos.exe
PID 2892 wrote to memory of 4088	2892	remcos.exe	remcos.exe
PID 2892 wrote to memory of 4088	2892	remcos.exe	remcos.exe
PID 2892 wrote to memory of 4088	2892	remcos.exe	remcos.exe
PID 2892 wrote to memory of 4064	2892	remcos.exe	remcos.exe
PID 2892 wrote to memory of 4064	2892	remcos.exe	remcos.exe
PID 2892 wrote to memory of 4064	2892	remcos.exe	remcos.exe
PID 2892 wrote to memory of 4064	2892	remcos.exe	remcos.exe
PID 2892 wrote to memory of 4064	2892	remcos.exe	remcos.exe
PID 2892 wrote to memory of 4064	2892	remcos.exe	remcos.exe
PID 2892 wrote to memory of 4064	2892	remcos.exe	remcos.exe
PID 2892 wrote to memory of 4064	2892	remcos.exe	remcos.exe
PID 2892 wrote to memory of 3336	2892	remcos.exe	remcos.exe
PID 2892 wrote to memory of 3336	2892	remcos.exe	remcos.exe
PID 2892 wrote to memory of 3336	2892	remcos.exe	remcos.exe
PID 2892 wrote to memory of 3336	2892	remcos.exe	remcos.exe
PID 2892 wrote to memory of 3336	2892	remcos.exe	remcos.exe
PID 2892 wrote to memory of 3336	2892	remcos.exe	remcos.exe
PID 2892 wrote to memory of 3336	2892	remcos.exe	remcos.exe
PID 2892 wrote to memory of 3336	2892	remcos.exe	remcos.exe

C:\Users\Admin\AppData\Local\Temp\i5TiYkAYkWJy1O8.exe
"C:\Users\Admin\AppData\Local\Temp\i5TiYkAYkWJy1O8.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4760

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\LChCpmvhHgIatd" /XML "C:\Users\Admin\AppData\Local\Temp\tmp3D19.tmp"
2⤵
- Creates scheduled task(s)
PID:508

C:\Users\Admin\AppData\Local\Temp\i5TiYkAYkWJy1O8.exe
"C:\Users\Admin\AppData\Local\Temp\i5TiYkAYkWJy1O8.exe"
2⤵
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:908

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
3⤵
- Suspicious use of WriteProcessMemory
PID:1168

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:1468

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:1748

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\LChCpmvhHgIatd" /XML "C:\Users\Admin\AppData\Local\Temp\tmp1180.tmp"
6⤵
- Creates scheduled task(s)
PID:2388

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 SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2892

C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\urfwampmozgnjgdmhfydn"
7⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:4088

C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\xlkobfaobhysmurqqqlfyezt"
7⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4064

C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\hfpzcxlhppqxwanuasyybjtcjqn"
7⤵
- Executes dropped EXE
PID:3336

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Lateral Movement

Collection

Data from Local System

T1005

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\Local\Temp\tmp1180.tmp
MD5
93d196cf8fb190a168daa534c7ec1260

SHA1
94b808aadb78297ee4cde62fadf10889a2f8d36e

SHA256
5e1405be4760de4b0982f1ecbaea1bce3a6ee1ecbd66dcfa1e639714805016d2

SHA512
2a03acf4706d761b708279191533b60beebb3a02a867e79932afe7daa20c8d8e9049365a8c9165f32ca02e21a3158508f17e98ab2dc2e7503f3f9cd9fabad42e

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp3D19.tmp
MD5
93d196cf8fb190a168daa534c7ec1260

SHA1
94b808aadb78297ee4cde62fadf10889a2f8d36e

SHA256
5e1405be4760de4b0982f1ecbaea1bce3a6ee1ecbd66dcfa1e639714805016d2

SHA512
2a03acf4706d761b708279191533b60beebb3a02a867e79932afe7daa20c8d8e9049365a8c9165f32ca02e21a3158508f17e98ab2dc2e7503f3f9cd9fabad42e

Download Submit
C:\Users\Admin\AppData\Local\Temp\urfwampmozgnjgdmhfydn
MD5
1e69b6d630e694119f4f8c448a430b60

SHA1
b118feca7d85ec706b54279a1dafc71673fe6e54

SHA256
2f7eedbe9e3b0a3aa08df4fa2dc27de189484a8da8925cc6056513d744b7c00e

SHA512
19924161f75cbbcf7bdf122f3aecb43d813186a6693413ccc15bb2945d48401c8f058edf034cc641cedc97ae5e328d88fabfab1b5f324014b83671b3ebd78822

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
e17a0488de5ca3c73672541143ee6927

SHA1
8a4c59f81c17710e665fb3e055dc1cbd28bc8ce6

SHA256
596479cd77e25e5d6dbf0b421afff049390813cc254ae90f86af00a10bdf6f90

SHA512
6766459cca6b6a25902973ca210e274241841e7acd2684ccb3f362040e3dbd568f1b430d305e773e50e0ec1e5e7cd879d8f3aff7d4cc30ce0a786be58555537d

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
e17a0488de5ca3c73672541143ee6927

SHA1
8a4c59f81c17710e665fb3e055dc1cbd28bc8ce6

SHA256
596479cd77e25e5d6dbf0b421afff049390813cc254ae90f86af00a10bdf6f90

SHA512
6766459cca6b6a25902973ca210e274241841e7acd2684ccb3f362040e3dbd568f1b430d305e773e50e0ec1e5e7cd879d8f3aff7d4cc30ce0a786be58555537d

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
e17a0488de5ca3c73672541143ee6927

SHA1
8a4c59f81c17710e665fb3e055dc1cbd28bc8ce6

SHA256
596479cd77e25e5d6dbf0b421afff049390813cc254ae90f86af00a10bdf6f90

SHA512
6766459cca6b6a25902973ca210e274241841e7acd2684ccb3f362040e3dbd568f1b430d305e773e50e0ec1e5e7cd879d8f3aff7d4cc30ce0a786be58555537d

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
e17a0488de5ca3c73672541143ee6927

SHA1
8a4c59f81c17710e665fb3e055dc1cbd28bc8ce6

SHA256
596479cd77e25e5d6dbf0b421afff049390813cc254ae90f86af00a10bdf6f90

SHA512
6766459cca6b6a25902973ca210e274241841e7acd2684ccb3f362040e3dbd568f1b430d305e773e50e0ec1e5e7cd879d8f3aff7d4cc30ce0a786be58555537d

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
e17a0488de5ca3c73672541143ee6927

SHA1
8a4c59f81c17710e665fb3e055dc1cbd28bc8ce6

SHA256
596479cd77e25e5d6dbf0b421afff049390813cc254ae90f86af00a10bdf6f90

SHA512
6766459cca6b6a25902973ca210e274241841e7acd2684ccb3f362040e3dbd568f1b430d305e773e50e0ec1e5e7cd879d8f3aff7d4cc30ce0a786be58555537d

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
e17a0488de5ca3c73672541143ee6927

SHA1
8a4c59f81c17710e665fb3e055dc1cbd28bc8ce6

SHA256
596479cd77e25e5d6dbf0b421afff049390813cc254ae90f86af00a10bdf6f90

SHA512
6766459cca6b6a25902973ca210e274241841e7acd2684ccb3f362040e3dbd568f1b430d305e773e50e0ec1e5e7cd879d8f3aff7d4cc30ce0a786be58555537d

Download Submit
memory/508-12-0x0000000000000000-mapping.dmp

Download
memory/908-14-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/908-15-0x0000000000413FA4-mapping.dmp

Download
memory/908-16-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1168-17-0x0000000000000000-mapping.dmp

Download
memory/1468-19-0x0000000000000000-mapping.dmp

Download
memory/1748-23-0x00000000732D0000-0x00000000739BE000-memory.dmp

Filesize
6.9MB

Download
memory/1748-20-0x0000000000000000-mapping.dmp

Download
memory/2388-33-0x0000000000000000-mapping.dmp

Download
memory/2892-38-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2892-36-0x0000000000413FA4-mapping.dmp

Download
memory/3336-52-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/3336-53-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/3336-49-0x0000000000455238-mapping.dmp

Download
memory/3336-48-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/4064-44-0x0000000000422206-mapping.dmp

Download
memory/4064-50-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4064-42-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4064-47-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4088-39-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4088-40-0x0000000000476274-mapping.dmp

Download
memory/4088-43-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4088-45-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4760-6-0x0000000004FB0000-0x0000000004FB1000-memory.dmp

Filesize
4KB

Download
memory/4760-8-0x00000000049A0000-0x00000000049A1000-memory.dmp

Filesize
4KB

Download
memory/4760-9-0x0000000004C70000-0x0000000004C71000-memory.dmp

Filesize
4KB

Download
memory/4760-7-0x0000000004AB0000-0x0000000004AB1000-memory.dmp

Filesize
4KB

Download
memory/4760-2-0x00000000732D0000-0x00000000739BE000-memory.dmp

Filesize
6.9MB

Download
memory/4760-5-0x0000000004A10000-0x0000000004A11000-memory.dmp

Filesize
4KB

Download
memory/4760-10-0x00000000049F0000-0x0000000004A02000-memory.dmp

Filesize
72KB

Download
memory/4760-11-0x0000000005810000-0x000000000586F000-memory.dmp

Filesize
380KB

Download
memory/4760-3-0x00000000000C0000-0x00000000000C1000-memory.dmp

Filesize
4KB

Download