remcos | af31df0399c0a4656499be1101463a7c87761dd26dda053503feed9218e47e59

Analysis

max time kernel
149s
max time network
153s
platform
windows7_x64
resource
win7v20201028
submitted
19-01-2021 07:33

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General

Target

PO - 2021-000511.exe
Size

330KB
MD5

1fe68462ce21c1dfa5bbc9501d636330
SHA1

800830eae62749ea1a30b70a94f51f644913212d
SHA256

af31df0399c0a4656499be1101463a7c87761dd26dda053503feed9218e47e59
SHA512

9dec8399b5d3dd4c39af35d54a71df27bf550e5ad05ff8c38adc2a0351c775cb376e84249d6cd84a7a648fbc10a7e7563551fef1e278bd97601585f948cea40d

Score

10^/10

remcos persistence rat spyware

Malware Config

Extracted

Family

remcos

nkosarevaocs.duckdns.org:7266

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

Processes:

resource	yara_rule
behavioral1/memory/1172-24-0x0000000000476274-mapping.dmp	WebBrowserPassView

Nirsoft 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1172-24-0x0000000000476274-mapping.dmp	Nirsoft

Executes dropped EXE 5 IoCs

Processes:

remcos.exeremcos.exeremcos.exeremcos.exeremcos.exe

pid process

420 remcos.exe
800 remcos.exe
1172 remcos.exe
568 remcos.exe
1228 remcos.exe
Loads dropped DLL 2 IoCs

Processes:

cmd.exe

pid process

916 cmd.exe
916 cmd.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
420	remcos.exe
800	remcos.exe
1172	remcos.exe
568	remcos.exe
1228	remcos.exe

pid	process
916	cmd.exe
916	cmd.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

remcos.exePO - 2021-000511.exe

description	ioc	process
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
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\	PO - 2021-000511.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\""	PO - 2021-000511.exe
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\	remcos.exe

Suspicious use of SetThreadContext 5 IoCs

Processes:

PO - 2021-000511.exeremcos.exeremcos.exe

description	pid	process	target process
PID 1100 set thread context of 1220	1100	PO - 2021-000511.exe	PO - 2021-000511.exe
PID 420 set thread context of 800	420	remcos.exe	remcos.exe
PID 800 set thread context of 1172	800	remcos.exe	remcos.exe
PID 800 set thread context of 568	800	remcos.exe	remcos.exe
PID 800 set thread context of 1228	800	remcos.exe	remcos.exe

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

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

1956 schtasks.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

remcos.exe

pid process

1172 remcos.exe
Suspicious behavior: MapViewOfSection 2 IoCs

Processes:

PO - 2021-000511.exeremcos.exe

pid process

1100 PO - 2021-000511.exe
420 remcos.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

remcos.exe

description pid process

Token: SeDebugPrivilege 568 remcos.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

remcos.exe

pid process

800 remcos.exe

pid	process
1956	schtasks.exe

pid	process
1172	remcos.exe

pid	process
1100	PO - 2021-000511.exe
420	remcos.exe

description	pid	process
Token: SeDebugPrivilege	568	remcos.exe

pid	process
800	remcos.exe

Suspicious use of WriteProcessMemory 57 IoCs

Processes:

PO - 2021-000511.execmd.exePO - 2021-000511.exeWScript.execmd.exeremcos.exeremcos.exe

description	pid	process	target process
PID 1100 wrote to memory of 1436	1100	PO - 2021-000511.exe	cmd.exe
PID 1100 wrote to memory of 1436	1100	PO - 2021-000511.exe	cmd.exe
PID 1100 wrote to memory of 1436	1100	PO - 2021-000511.exe	cmd.exe
PID 1100 wrote to memory of 1436	1100	PO - 2021-000511.exe	cmd.exe
PID 1100 wrote to memory of 1220	1100	PO - 2021-000511.exe	PO - 2021-000511.exe
PID 1100 wrote to memory of 1220	1100	PO - 2021-000511.exe	PO - 2021-000511.exe
PID 1100 wrote to memory of 1220	1100	PO - 2021-000511.exe	PO - 2021-000511.exe
PID 1100 wrote to memory of 1220	1100	PO - 2021-000511.exe	PO - 2021-000511.exe
PID 1100 wrote to memory of 1220	1100	PO - 2021-000511.exe	PO - 2021-000511.exe
PID 1436 wrote to memory of 1956	1436	cmd.exe	schtasks.exe
PID 1436 wrote to memory of 1956	1436	cmd.exe	schtasks.exe
PID 1436 wrote to memory of 1956	1436	cmd.exe	schtasks.exe
PID 1436 wrote to memory of 1956	1436	cmd.exe	schtasks.exe
PID 1220 wrote to memory of 1724	1220	PO - 2021-000511.exe	WScript.exe
PID 1220 wrote to memory of 1724	1220	PO - 2021-000511.exe	WScript.exe
PID 1220 wrote to memory of 1724	1220	PO - 2021-000511.exe	WScript.exe
PID 1220 wrote to memory of 1724	1220	PO - 2021-000511.exe	WScript.exe
PID 1724 wrote to memory of 916	1724	WScript.exe	cmd.exe
PID 1724 wrote to memory of 916	1724	WScript.exe	cmd.exe
PID 1724 wrote to memory of 916	1724	WScript.exe	cmd.exe
PID 1724 wrote to memory of 916	1724	WScript.exe	cmd.exe
PID 916 wrote to memory of 420	916	cmd.exe	remcos.exe
PID 916 wrote to memory of 420	916	cmd.exe	remcos.exe
PID 916 wrote to memory of 420	916	cmd.exe	remcos.exe
PID 916 wrote to memory of 420	916	cmd.exe	remcos.exe
PID 420 wrote to memory of 800	420	remcos.exe	remcos.exe
PID 420 wrote to memory of 800	420	remcos.exe	remcos.exe
PID 420 wrote to memory of 800	420	remcos.exe	remcos.exe
PID 420 wrote to memory of 800	420	remcos.exe	remcos.exe
PID 420 wrote to memory of 800	420	remcos.exe	remcos.exe
PID 800 wrote to memory of 1172	800	remcos.exe	remcos.exe
PID 800 wrote to memory of 1172	800	remcos.exe	remcos.exe
PID 800 wrote to memory of 1172	800	remcos.exe	remcos.exe
PID 800 wrote to memory of 1172	800	remcos.exe	remcos.exe
PID 800 wrote to memory of 1172	800	remcos.exe	remcos.exe
PID 800 wrote to memory of 1172	800	remcos.exe	remcos.exe
PID 800 wrote to memory of 1172	800	remcos.exe	remcos.exe
PID 800 wrote to memory of 1172	800	remcos.exe	remcos.exe
PID 800 wrote to memory of 1172	800	remcos.exe	remcos.exe
PID 800 wrote to memory of 568	800	remcos.exe	remcos.exe
PID 800 wrote to memory of 568	800	remcos.exe	remcos.exe
PID 800 wrote to memory of 568	800	remcos.exe	remcos.exe
PID 800 wrote to memory of 568	800	remcos.exe	remcos.exe
PID 800 wrote to memory of 568	800	remcos.exe	remcos.exe
PID 800 wrote to memory of 568	800	remcos.exe	remcos.exe
PID 800 wrote to memory of 568	800	remcos.exe	remcos.exe
PID 800 wrote to memory of 568	800	remcos.exe	remcos.exe
PID 800 wrote to memory of 568	800	remcos.exe	remcos.exe
PID 800 wrote to memory of 1228	800	remcos.exe	remcos.exe
PID 800 wrote to memory of 1228	800	remcos.exe	remcos.exe
PID 800 wrote to memory of 1228	800	remcos.exe	remcos.exe
PID 800 wrote to memory of 1228	800	remcos.exe	remcos.exe
PID 800 wrote to memory of 1228	800	remcos.exe	remcos.exe
PID 800 wrote to memory of 1228	800	remcos.exe	remcos.exe
PID 800 wrote to memory of 1228	800	remcos.exe	remcos.exe
PID 800 wrote to memory of 1228	800	remcos.exe	remcos.exe
PID 800 wrote to memory of 1228	800	remcos.exe	remcos.exe

C:\Users\Admin\AppData\Local\Temp\PO - 2021-000511.exe
"C:\Users\Admin\AppData\Local\Temp\PO - 2021-000511.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1100

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /Create /TN name /XML "C:\Users\Admin\AppData\Local\Temp\46259bbd81d449c087c91b64fdbc15ad.xml"
2⤵
- Suspicious use of WriteProcessMemory
PID:1436

C:\Windows\SysWOW64\schtasks.exe
schtasks /Create /TN name /XML "C:\Users\Admin\AppData\Local\Temp\46259bbd81d449c087c91b64fdbc15ad.xml"
3⤵
- Creates scheduled task(s)
PID:1956

C:\Users\Admin\AppData\Local\Temp\PO - 2021-000511.exe
"C:\Users\Admin\AppData\Local\Temp\PO - 2021-000511.exe"
2⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1220

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
3⤵
- Suspicious use of WriteProcessMemory
PID:1724

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: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:420

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 SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:800

C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\fgpiabavhxnixjagchqoigvjqc"
7⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:1172

C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\pavsbtkwvgfvzqostsdptlqsyjlwo"
7⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:568

C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\sciltmvqroxajekwccyrwyljzxdxhqgsb"
7⤵
- Executes dropped EXE
PID:1228

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\46259bbd81d449c087c91b64fdbc15ad.xml
MD5
a035055e1c80bc652520df45650c690f

SHA1
37b8364ad46e17199eb5a7ee89bb506bba384adb

SHA256
2b9948d34674d0fc0f9cb290da8298441b56205f6e341e3cfa1954df42c2b655

SHA512
678279d1bfc8a71c27a5a2c3afa5fd266882a62610863a3e4ebc2489f17827ed4c680c89e6b8b52621320500294d2df9888259ccdc5d38def43e739c1f325fc1

Download Submit
C:\Users\Admin\AppData\Local\Temp\fgpiabavhxnixjagchqoigvjqc
MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
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
1fe68462ce21c1dfa5bbc9501d636330

SHA1
800830eae62749ea1a30b70a94f51f644913212d

SHA256
af31df0399c0a4656499be1101463a7c87761dd26dda053503feed9218e47e59

SHA512
9dec8399b5d3dd4c39af35d54a71df27bf550e5ad05ff8c38adc2a0351c775cb376e84249d6cd84a7a648fbc10a7e7563551fef1e278bd97601585f948cea40d

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
1fe68462ce21c1dfa5bbc9501d636330

SHA1
800830eae62749ea1a30b70a94f51f644913212d

SHA256
af31df0399c0a4656499be1101463a7c87761dd26dda053503feed9218e47e59

SHA512
9dec8399b5d3dd4c39af35d54a71df27bf550e5ad05ff8c38adc2a0351c775cb376e84249d6cd84a7a648fbc10a7e7563551fef1e278bd97601585f948cea40d

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
1fe68462ce21c1dfa5bbc9501d636330

SHA1
800830eae62749ea1a30b70a94f51f644913212d

SHA256
af31df0399c0a4656499be1101463a7c87761dd26dda053503feed9218e47e59

SHA512
9dec8399b5d3dd4c39af35d54a71df27bf550e5ad05ff8c38adc2a0351c775cb376e84249d6cd84a7a648fbc10a7e7563551fef1e278bd97601585f948cea40d

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
1fe68462ce21c1dfa5bbc9501d636330

SHA1
800830eae62749ea1a30b70a94f51f644913212d

SHA256
af31df0399c0a4656499be1101463a7c87761dd26dda053503feed9218e47e59

SHA512
9dec8399b5d3dd4c39af35d54a71df27bf550e5ad05ff8c38adc2a0351c775cb376e84249d6cd84a7a648fbc10a7e7563551fef1e278bd97601585f948cea40d

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
1fe68462ce21c1dfa5bbc9501d636330

SHA1
800830eae62749ea1a30b70a94f51f644913212d

SHA256
af31df0399c0a4656499be1101463a7c87761dd26dda053503feed9218e47e59

SHA512
9dec8399b5d3dd4c39af35d54a71df27bf550e5ad05ff8c38adc2a0351c775cb376e84249d6cd84a7a648fbc10a7e7563551fef1e278bd97601585f948cea40d

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
1fe68462ce21c1dfa5bbc9501d636330

SHA1
800830eae62749ea1a30b70a94f51f644913212d

SHA256
af31df0399c0a4656499be1101463a7c87761dd26dda053503feed9218e47e59

SHA512
9dec8399b5d3dd4c39af35d54a71df27bf550e5ad05ff8c38adc2a0351c775cb376e84249d6cd84a7a648fbc10a7e7563551fef1e278bd97601585f948cea40d

Download Submit
\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
1fe68462ce21c1dfa5bbc9501d636330

SHA1
800830eae62749ea1a30b70a94f51f644913212d

SHA256
af31df0399c0a4656499be1101463a7c87761dd26dda053503feed9218e47e59

SHA512
9dec8399b5d3dd4c39af35d54a71df27bf550e5ad05ff8c38adc2a0351c775cb376e84249d6cd84a7a648fbc10a7e7563551fef1e278bd97601585f948cea40d

Download Submit
\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
1fe68462ce21c1dfa5bbc9501d636330

SHA1
800830eae62749ea1a30b70a94f51f644913212d

SHA256
af31df0399c0a4656499be1101463a7c87761dd26dda053503feed9218e47e59

SHA512
9dec8399b5d3dd4c39af35d54a71df27bf550e5ad05ff8c38adc2a0351c775cb376e84249d6cd84a7a648fbc10a7e7563551fef1e278bd97601585f948cea40d

Download Submit
memory/420-17-0x0000000000000000-mapping.dmp

Download
memory/568-26-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/568-28-0x0000000000422206-mapping.dmp

Download
memory/568-38-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/800-19-0x0000000000413FA4-mapping.dmp

Download
memory/800-22-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/916-12-0x0000000000000000-mapping.dmp

Download
memory/1100-2-0x00000000765E1000-0x00000000765E3000-memory.dmp

Filesize
8KB

Download
memory/1172-23-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1172-24-0x0000000000476274-mapping.dmp

Download
memory/1172-37-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1220-4-0x0000000000413FA4-mapping.dmp

Download
memory/1220-9-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1228-31-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/1228-32-0x0000000000455238-mapping.dmp

Download
memory/1228-39-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/1436-3-0x0000000000000000-mapping.dmp

Download
memory/1724-8-0x0000000000000000-mapping.dmp

Download
memory/1724-13-0x00000000027E0000-0x00000000027E4000-memory.dmp

Filesize
16KB

Download
memory/1844-35-0x000007FEF6350000-0x000007FEF65CA000-memory.dmp

Filesize
2.5MB

Download
memory/1956-6-0x0000000000000000-mapping.dmp

Download