remcos | e3fceaabe401036d5b259a767747f86c6563db8d122c87e70506ce84ad622638

Analysis

max time kernel
149s
max time network
152s
platform
windows7_x64
resource
win7v20201028
submitted
19-01-2021 13:09

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General

Target

PO.exe
Size

167KB
MD5

b83b2773148e40f003ffd62920a88ab1
SHA1

c738d07984d406be0aa87d36eae86e7fa81f68b7
SHA256

e3fceaabe401036d5b259a767747f86c6563db8d122c87e70506ce84ad622638
SHA512

eb2b4286611d6515b72cafdef2c7f73626f86b73060d424862df6e9a5ff5fe29159ea6bb39e501a943e500d8404aecedaf5be07fe40aa49e5952e931895efa2e

Score

10^/10

remcos persistence rat spyware

Malware Config

Extracted

Family

remcos

eileenwmsscm.duckdns.org:2558

Signatures

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

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

Processes:

resource	yara_rule
behavioral1/memory/1740-36-0x0000000000455238-mapping.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

Processes:

resource	yara_rule
behavioral1/memory/672-29-0x0000000000476274-mapping.dmp	WebBrowserPassView

Nirsoft 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/672-29-0x0000000000476274-mapping.dmp	Nirsoft
behavioral1/memory/1568-33-0x0000000000422206-mapping.dmp	Nirsoft
behavioral1/memory/1740-36-0x0000000000455238-mapping.dmp	Nirsoft

Executes dropped EXE 7 IoCs

Processes:

remcos.exeremcos.exeremcos.exeremcos.exeremcos.exeremcos.exeremcos.exe

pid process

564 remcos.exe
908 remcos.exe
1364 remcos.exe
924 remcos.exe
672 remcos.exe
1568 remcos.exe
1740 remcos.exe
Loads dropped DLL 2 IoCs

Processes:

cmd.exe

pid process

1596 cmd.exe
1596 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
564	remcos.exe
908	remcos.exe
1364	remcos.exe
924	remcos.exe
672	remcos.exe
1568	remcos.exe
1740	remcos.exe

pid	process
1596	cmd.exe
1596	cmd.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

PO.exeremcos.exe

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

Processes:

PO.exeremcos.exeremcos.exe

description	pid	process	target process
PID 1684 set thread context of 1984	1684	PO.exe	PO.exe
PID 1364 set thread context of 924	1364	remcos.exe	remcos.exe
PID 924 set thread context of 672	924	remcos.exe	remcos.exe
PID 924 set thread context of 1568	924	remcos.exe	remcos.exe
PID 924 set thread context of 1740	924	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

1940 schtasks.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

remcos.exe

pid process

672 remcos.exe
Suspicious behavior: MapViewOfSection 3 IoCs

Processes:

PO.exeremcos.exeremcos.exe

pid process

1684 PO.exe
564 remcos.exe
1364 remcos.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

remcos.exe

description pid process

Token: SeDebugPrivilege 1568 remcos.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

remcos.exe

pid process

924 remcos.exe

pid	process
1940	schtasks.exe

pid	process
672	remcos.exe

pid	process
1684	PO.exe
564	remcos.exe
1364	remcos.exe

description	pid	process
Token: SeDebugPrivilege	1568	remcos.exe

pid	process
924	remcos.exe

Suspicious use of WriteProcessMemory 65 IoCs

Processes:

PO.execmd.exePO.exeWScript.execmd.exeremcos.exeremcos.exeremcos.exe

description	pid	process	target process
PID 1684 wrote to memory of 1952	1684	PO.exe	cmd.exe
PID 1684 wrote to memory of 1952	1684	PO.exe	cmd.exe
PID 1684 wrote to memory of 1952	1684	PO.exe	cmd.exe
PID 1684 wrote to memory of 1952	1684	PO.exe	cmd.exe
PID 1684 wrote to memory of 1984	1684	PO.exe	PO.exe
PID 1684 wrote to memory of 1984	1684	PO.exe	PO.exe
PID 1684 wrote to memory of 1984	1684	PO.exe	PO.exe
PID 1684 wrote to memory of 1984	1684	PO.exe	PO.exe
PID 1684 wrote to memory of 1984	1684	PO.exe	PO.exe
PID 1952 wrote to memory of 1940	1952	cmd.exe	schtasks.exe
PID 1952 wrote to memory of 1940	1952	cmd.exe	schtasks.exe
PID 1952 wrote to memory of 1940	1952	cmd.exe	schtasks.exe
PID 1952 wrote to memory of 1940	1952	cmd.exe	schtasks.exe
PID 1984 wrote to memory of 1900	1984	PO.exe	WScript.exe
PID 1984 wrote to memory of 1900	1984	PO.exe	WScript.exe
PID 1984 wrote to memory of 1900	1984	PO.exe	WScript.exe
PID 1984 wrote to memory of 1900	1984	PO.exe	WScript.exe
PID 1900 wrote to memory of 1596	1900	WScript.exe	cmd.exe
PID 1900 wrote to memory of 1596	1900	WScript.exe	cmd.exe
PID 1900 wrote to memory of 1596	1900	WScript.exe	cmd.exe
PID 1900 wrote to memory of 1596	1900	WScript.exe	cmd.exe
PID 1596 wrote to memory of 564	1596	cmd.exe	remcos.exe
PID 1596 wrote to memory of 564	1596	cmd.exe	remcos.exe
PID 1596 wrote to memory of 564	1596	cmd.exe	remcos.exe
PID 1596 wrote to memory of 564	1596	cmd.exe	remcos.exe
PID 564 wrote to memory of 908	564	remcos.exe	remcos.exe
PID 564 wrote to memory of 908	564	remcos.exe	remcos.exe
PID 564 wrote to memory of 908	564	remcos.exe	remcos.exe
PID 564 wrote to memory of 908	564	remcos.exe	remcos.exe
PID 564 wrote to memory of 1364	564	remcos.exe	remcos.exe
PID 564 wrote to memory of 1364	564	remcos.exe	remcos.exe
PID 564 wrote to memory of 1364	564	remcos.exe	remcos.exe
PID 564 wrote to memory of 1364	564	remcos.exe	remcos.exe
PID 1364 wrote to memory of 924	1364	remcos.exe	remcos.exe
PID 1364 wrote to memory of 924	1364	remcos.exe	remcos.exe
PID 1364 wrote to memory of 924	1364	remcos.exe	remcos.exe
PID 1364 wrote to memory of 924	1364	remcos.exe	remcos.exe
PID 1364 wrote to memory of 924	1364	remcos.exe	remcos.exe
PID 924 wrote to memory of 672	924	remcos.exe	remcos.exe
PID 924 wrote to memory of 672	924	remcos.exe	remcos.exe
PID 924 wrote to memory of 672	924	remcos.exe	remcos.exe
PID 924 wrote to memory of 672	924	remcos.exe	remcos.exe
PID 924 wrote to memory of 672	924	remcos.exe	remcos.exe
PID 924 wrote to memory of 672	924	remcos.exe	remcos.exe
PID 924 wrote to memory of 672	924	remcos.exe	remcos.exe
PID 924 wrote to memory of 672	924	remcos.exe	remcos.exe
PID 924 wrote to memory of 672	924	remcos.exe	remcos.exe
PID 924 wrote to memory of 1568	924	remcos.exe	remcos.exe
PID 924 wrote to memory of 1568	924	remcos.exe	remcos.exe
PID 924 wrote to memory of 1568	924	remcos.exe	remcos.exe
PID 924 wrote to memory of 1568	924	remcos.exe	remcos.exe
PID 924 wrote to memory of 1568	924	remcos.exe	remcos.exe
PID 924 wrote to memory of 1568	924	remcos.exe	remcos.exe
PID 924 wrote to memory of 1568	924	remcos.exe	remcos.exe
PID 924 wrote to memory of 1568	924	remcos.exe	remcos.exe
PID 924 wrote to memory of 1568	924	remcos.exe	remcos.exe
PID 924 wrote to memory of 1740	924	remcos.exe	remcos.exe
PID 924 wrote to memory of 1740	924	remcos.exe	remcos.exe
PID 924 wrote to memory of 1740	924	remcos.exe	remcos.exe
PID 924 wrote to memory of 1740	924	remcos.exe	remcos.exe
PID 924 wrote to memory of 1740	924	remcos.exe	remcos.exe
PID 924 wrote to memory of 1740	924	remcos.exe	remcos.exe
PID 924 wrote to memory of 1740	924	remcos.exe	remcos.exe
PID 924 wrote to memory of 1740	924	remcos.exe	remcos.exe

C:\Users\Admin\AppData\Local\Temp\PO.exe
"C:\Users\Admin\AppData\Local\Temp\PO.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1684

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /Create /TN name /XML "C:\Users\Admin\AppData\Local\Temp\631efcfa33984133a4d53cafd1db6808.xml"
2⤵
- Suspicious use of WriteProcessMemory
PID:1952

C:\Windows\SysWOW64\schtasks.exe
schtasks /Create /TN name /XML "C:\Users\Admin\AppData\Local\Temp\631efcfa33984133a4d53cafd1db6808.xml"
3⤵
- Creates scheduled task(s)
PID:1940

C:\Users\Admin\AppData\Local\Temp\PO.exe
"C:\Users\Admin\AppData\Local\Temp\PO.exe"
2⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1984

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
3⤵
- Suspicious use of WriteProcessMemory
PID:1900

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:1596

C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
5⤵
- Executes dropped EXE
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:564

C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
6⤵
- Executes dropped EXE
PID:908

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:1364

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 SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:924

C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\ufzkpdrdsbajiahbu"
8⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:672

C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\ezfdqwbegjsntgdfdyttm"
8⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1568

C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\hbkwqouyurkavurrujnnpvyv"
8⤵
- Executes dropped EXE
PID:1740

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\631efcfa33984133a4d53cafd1db6808.xml
MD5
a035055e1c80bc652520df45650c690f

SHA1
37b8364ad46e17199eb5a7ee89bb506bba384adb

SHA256
2b9948d34674d0fc0f9cb290da8298441b56205f6e341e3cfa1954df42c2b655

SHA512
678279d1bfc8a71c27a5a2c3afa5fd266882a62610863a3e4ebc2489f17827ed4c680c89e6b8b52621320500294d2df9888259ccdc5d38def43e739c1f325fc1

Download Submit
C:\Users\Admin\AppData\Local\Temp\install.vbs
MD5
b92d64fe5b1d1f59df4b738262aea8df

SHA1
c8fb1981759c2d9bb2ec91b705985fba5fc7af63

SHA256
fa20e9aab03dc8e9f1910aaf0cf42662379fa16ae3a22642084fb97fa3d4f83a

SHA512
2566248b93c0cfb0414f033b8dd18bbd4f88180093eac2861107289bcb4ee160f9593706ff1f7d1f2e4ecea430d67a5a2897551a4f9ebd82b707243e300520e2

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

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
b83b2773148e40f003ffd62920a88ab1

SHA1
c738d07984d406be0aa87d36eae86e7fa81f68b7

SHA256
e3fceaabe401036d5b259a767747f86c6563db8d122c87e70506ce84ad622638

SHA512
eb2b4286611d6515b72cafdef2c7f73626f86b73060d424862df6e9a5ff5fe29159ea6bb39e501a943e500d8404aecedaf5be07fe40aa49e5952e931895efa2e

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
b83b2773148e40f003ffd62920a88ab1

SHA1
c738d07984d406be0aa87d36eae86e7fa81f68b7

SHA256
e3fceaabe401036d5b259a767747f86c6563db8d122c87e70506ce84ad622638

SHA512
eb2b4286611d6515b72cafdef2c7f73626f86b73060d424862df6e9a5ff5fe29159ea6bb39e501a943e500d8404aecedaf5be07fe40aa49e5952e931895efa2e

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
b83b2773148e40f003ffd62920a88ab1

SHA1
c738d07984d406be0aa87d36eae86e7fa81f68b7

SHA256
e3fceaabe401036d5b259a767747f86c6563db8d122c87e70506ce84ad622638

SHA512
eb2b4286611d6515b72cafdef2c7f73626f86b73060d424862df6e9a5ff5fe29159ea6bb39e501a943e500d8404aecedaf5be07fe40aa49e5952e931895efa2e

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
b83b2773148e40f003ffd62920a88ab1

SHA1
c738d07984d406be0aa87d36eae86e7fa81f68b7

SHA256
e3fceaabe401036d5b259a767747f86c6563db8d122c87e70506ce84ad622638

SHA512
eb2b4286611d6515b72cafdef2c7f73626f86b73060d424862df6e9a5ff5fe29159ea6bb39e501a943e500d8404aecedaf5be07fe40aa49e5952e931895efa2e

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
b83b2773148e40f003ffd62920a88ab1

SHA1
c738d07984d406be0aa87d36eae86e7fa81f68b7

SHA256
e3fceaabe401036d5b259a767747f86c6563db8d122c87e70506ce84ad622638

SHA512
eb2b4286611d6515b72cafdef2c7f73626f86b73060d424862df6e9a5ff5fe29159ea6bb39e501a943e500d8404aecedaf5be07fe40aa49e5952e931895efa2e

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
b83b2773148e40f003ffd62920a88ab1

SHA1
c738d07984d406be0aa87d36eae86e7fa81f68b7

SHA256
e3fceaabe401036d5b259a767747f86c6563db8d122c87e70506ce84ad622638

SHA512
eb2b4286611d6515b72cafdef2c7f73626f86b73060d424862df6e9a5ff5fe29159ea6bb39e501a943e500d8404aecedaf5be07fe40aa49e5952e931895efa2e

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
b83b2773148e40f003ffd62920a88ab1

SHA1
c738d07984d406be0aa87d36eae86e7fa81f68b7

SHA256
e3fceaabe401036d5b259a767747f86c6563db8d122c87e70506ce84ad622638

SHA512
eb2b4286611d6515b72cafdef2c7f73626f86b73060d424862df6e9a5ff5fe29159ea6bb39e501a943e500d8404aecedaf5be07fe40aa49e5952e931895efa2e

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
b83b2773148e40f003ffd62920a88ab1

SHA1
c738d07984d406be0aa87d36eae86e7fa81f68b7

SHA256
e3fceaabe401036d5b259a767747f86c6563db8d122c87e70506ce84ad622638

SHA512
eb2b4286611d6515b72cafdef2c7f73626f86b73060d424862df6e9a5ff5fe29159ea6bb39e501a943e500d8404aecedaf5be07fe40aa49e5952e931895efa2e

Download Submit
\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
b83b2773148e40f003ffd62920a88ab1

SHA1
c738d07984d406be0aa87d36eae86e7fa81f68b7

SHA256
e3fceaabe401036d5b259a767747f86c6563db8d122c87e70506ce84ad622638

SHA512
eb2b4286611d6515b72cafdef2c7f73626f86b73060d424862df6e9a5ff5fe29159ea6bb39e501a943e500d8404aecedaf5be07fe40aa49e5952e931895efa2e

Download Submit
\Users\Admin\AppData\Roaming\Remcos\remcos.exe
MD5
b83b2773148e40f003ffd62920a88ab1

SHA1
c738d07984d406be0aa87d36eae86e7fa81f68b7

SHA256
e3fceaabe401036d5b259a767747f86c6563db8d122c87e70506ce84ad622638

SHA512
eb2b4286611d6515b72cafdef2c7f73626f86b73060d424862df6e9a5ff5fe29159ea6bb39e501a943e500d8404aecedaf5be07fe40aa49e5952e931895efa2e

Download Submit
memory/564-17-0x0000000000000000-mapping.dmp

Download
memory/672-29-0x0000000000476274-mapping.dmp

Download
memory/672-28-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/672-40-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/924-27-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/924-24-0x0000000000413FA4-mapping.dmp

Download
memory/1364-21-0x0000000000000000-mapping.dmp

Download
memory/1568-31-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1568-33-0x0000000000422206-mapping.dmp

Download
memory/1568-41-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1596-12-0x0000000000000000-mapping.dmp

Download
memory/1684-2-0x00000000756A1000-0x00000000756A3000-memory.dmp

Filesize
8KB

Download
memory/1740-36-0x0000000000455238-mapping.dmp

Download
memory/1740-42-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/1740-35-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/1900-8-0x0000000000000000-mapping.dmp

Download
memory/1900-13-0x0000000002600000-0x0000000002604000-memory.dmp

Filesize
16KB

Download
memory/1928-43-0x000007FEF7C10000-0x000007FEF7E8A000-memory.dmp

Filesize
2.5MB

Download
memory/1940-6-0x0000000000000000-mapping.dmp

Download
memory/1952-3-0x0000000000000000-mapping.dmp

Download
memory/1984-4-0x0000000000413FA4-mapping.dmp

Download
memory/1984-11-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download