remcos | caf08c94a95672212ab753293db7e6ca97cec7ddc28ece68d978f3008a5a6668

Analysis

max time kernel
150s
max time network
153s
platform
windows7_x64
resource
win7-en-20211208
submitted
26-01-2022 15:00

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General

Target

Rfq_products order.exe
Size

1.5MB
MD5

99b649db223cbef960a8423dd7d50381
SHA1

e4912bb05d068e6edbe5576a9a929d14590efbe3
SHA256

caf08c94a95672212ab753293db7e6ca97cec7ddc28ece68d978f3008a5a6668
SHA512

74b267dba2fd39d04165d4b80c2ca8a7fc04d2894c014c6bf059006874cb3f5ae937fbb12f26ddff81a5a8c8c7e8959c8a35cdd8b970f8affb4404df9041bfa0

Score

10^/10

remcos remotehost persistence rat

Malware Config

Extracted

Family

remcos

Version

3.2.1 Pro

Botnet

RemoteHost

janeilla.myddns.me:9711

Attributes

audio_folder
MicRecords
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
Remcos
delete_file
false
hide_file
false
hide_keylog_file
true
install_flag
false
install_path
%AppData%
keylog_crypt
true
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
Remcos-SLEDDG
screenshot_crypt
false
screenshot_flag
true
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Remcos
take_screenshot_option
false
take_screenshot_time
5
take_screenshot_title
notepad;solitaire;

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

Processes:

reg.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,C:\\Users\\Admin\\AppData\\Roaming\\mssrce.exe,"	reg.exe

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Executes dropped EXE 4 IoCs

Processes:

mssrce.exeAddInProcess32.exemssrCE.exemssrCE.exe

pid process

660 mssrce.exe
1872 AddInProcess32.exe
1952 mssrCE.exe
1612 mssrCE.exe
Loads dropped DLL 4 IoCs

Processes:

cmd.exemssrce.exemssrCE.exe

pid process

812 cmd.exe
660 mssrce.exe
660 mssrce.exe
1952 mssrCE.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

mssrce.exe

description pid process target process

PID 660 set thread context of 1872 660 mssrce.exe AddInProcess32.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery
T1018

Processes:

PING.EXEPING.EXEPING.EXE

pid process

1540 PING.EXE
1836 PING.EXE
1852 PING.EXE

pid	process
660	mssrce.exe
1872	AddInProcess32.exe
1952	mssrCE.exe
1612	mssrCE.exe

pid	process
812	cmd.exe
660	mssrce.exe
660	mssrce.exe
1952	mssrCE.exe

description	pid	process	target process
PID 660 set thread context of 1872	660	mssrce.exe	AddInProcess32.exe

pid	process
1540	PING.EXE
1836	PING.EXE
1852	PING.EXE

Suspicious behavior: EnumeratesProcesses 14 IoCs

Processes:

Rfq_products order.exemssrce.exemssrCE.exemssrCE.exe

pid	process
944	Rfq_products order.exe
944	Rfq_products order.exe
944	Rfq_products order.exe
944	Rfq_products order.exe
944	Rfq_products order.exe
660	mssrce.exe
660	mssrce.exe
660	mssrce.exe
1952	mssrCE.exe
1612	mssrCE.exe
1612	mssrCE.exe
1612	mssrCE.exe
660	mssrce.exe
660	mssrce.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

Rfq_products order.exemssrce.exemssrCE.exemssrCE.exe

description	pid	process
Token: SeDebugPrivilege	944	Rfq_products order.exe
Token: SeDebugPrivilege	660	mssrce.exe
Token: SeDebugPrivilege	1952	mssrCE.exe
Token: SeDebugPrivilege	1612	mssrCE.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

AddInProcess32.exe

pid process

1872 AddInProcess32.exe

pid	process
1872	AddInProcess32.exe

Suspicious use of WriteProcessMemory 49 IoCs

Processes:

Rfq_products order.execmd.execmd.exemssrce.exemssrCE.exe

description	pid	process	target process
PID 944 wrote to memory of 720	944	Rfq_products order.exe	cmd.exe
PID 944 wrote to memory of 720	944	Rfq_products order.exe	cmd.exe
PID 944 wrote to memory of 720	944	Rfq_products order.exe	cmd.exe
PID 944 wrote to memory of 720	944	Rfq_products order.exe	cmd.exe
PID 720 wrote to memory of 1540	720	cmd.exe	PING.EXE
PID 720 wrote to memory of 1540	720	cmd.exe	PING.EXE
PID 720 wrote to memory of 1540	720	cmd.exe	PING.EXE
PID 720 wrote to memory of 1540	720	cmd.exe	PING.EXE
PID 944 wrote to memory of 812	944	Rfq_products order.exe	cmd.exe
PID 944 wrote to memory of 812	944	Rfq_products order.exe	cmd.exe
PID 944 wrote to memory of 812	944	Rfq_products order.exe	cmd.exe
PID 944 wrote to memory of 812	944	Rfq_products order.exe	cmd.exe
PID 812 wrote to memory of 1836	812	cmd.exe	PING.EXE
PID 812 wrote to memory of 1836	812	cmd.exe	PING.EXE
PID 812 wrote to memory of 1836	812	cmd.exe	PING.EXE
PID 812 wrote to memory of 1836	812	cmd.exe	PING.EXE
PID 720 wrote to memory of 1932	720	cmd.exe	reg.exe
PID 720 wrote to memory of 1932	720	cmd.exe	reg.exe
PID 720 wrote to memory of 1932	720	cmd.exe	reg.exe
PID 720 wrote to memory of 1932	720	cmd.exe	reg.exe
PID 812 wrote to memory of 1852	812	cmd.exe	PING.EXE
PID 812 wrote to memory of 1852	812	cmd.exe	PING.EXE
PID 812 wrote to memory of 1852	812	cmd.exe	PING.EXE
PID 812 wrote to memory of 1852	812	cmd.exe	PING.EXE
PID 812 wrote to memory of 660	812	cmd.exe	mssrce.exe
PID 812 wrote to memory of 660	812	cmd.exe	mssrce.exe
PID 812 wrote to memory of 660	812	cmd.exe	mssrce.exe
PID 812 wrote to memory of 660	812	cmd.exe	mssrce.exe
PID 660 wrote to memory of 1872	660	mssrce.exe	AddInProcess32.exe
PID 660 wrote to memory of 1872	660	mssrce.exe	AddInProcess32.exe
PID 660 wrote to memory of 1872	660	mssrce.exe	AddInProcess32.exe
PID 660 wrote to memory of 1872	660	mssrce.exe	AddInProcess32.exe
PID 660 wrote to memory of 1872	660	mssrce.exe	AddInProcess32.exe
PID 660 wrote to memory of 1872	660	mssrce.exe	AddInProcess32.exe
PID 660 wrote to memory of 1872	660	mssrce.exe	AddInProcess32.exe
PID 660 wrote to memory of 1872	660	mssrce.exe	AddInProcess32.exe
PID 660 wrote to memory of 1872	660	mssrce.exe	AddInProcess32.exe
PID 660 wrote to memory of 1872	660	mssrce.exe	AddInProcess32.exe
PID 660 wrote to memory of 1872	660	mssrce.exe	AddInProcess32.exe
PID 660 wrote to memory of 1872	660	mssrce.exe	AddInProcess32.exe
PID 660 wrote to memory of 1872	660	mssrce.exe	AddInProcess32.exe
PID 660 wrote to memory of 1952	660	mssrce.exe	mssrCE.exe
PID 660 wrote to memory of 1952	660	mssrce.exe	mssrCE.exe
PID 660 wrote to memory of 1952	660	mssrce.exe	mssrCE.exe
PID 660 wrote to memory of 1952	660	mssrce.exe	mssrCE.exe
PID 1952 wrote to memory of 1612	1952	mssrCE.exe	mssrCE.exe
PID 1952 wrote to memory of 1612	1952	mssrCE.exe	mssrCE.exe
PID 1952 wrote to memory of 1612	1952	mssrCE.exe	mssrCE.exe
PID 1952 wrote to memory of 1612	1952	mssrCE.exe	mssrCE.exe

C:\Users\Admin\AppData\Local\Temp\Rfq_products order.exe
"C:\Users\Admin\AppData\Local\Temp\Rfq_products order.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:944

C:\Windows\SysWOW64\cmd.exe
"cmd" /c ping 127.0.0.1 -n 10 > nul && REG ADD "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /f /v "Shell" /t REG_SZ /d "explorer.exe,C:\Users\Admin\AppData\Roaming\mssrce.exe,"
2⤵
- Suspicious use of WriteProcessMemory
PID:720

C:\Windows\SysWOW64\PING.EXE
ping 127.0.0.1 -n 10
3⤵
- Runs ping.exe
PID:1540

C:\Windows\SysWOW64\reg.exe
REG ADD "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /f /v "Shell" /t REG_SZ /d "explorer.exe,C:\Users\Admin\AppData\Roaming\mssrce.exe,"
3⤵
- Modifies WinLogon for persistence
PID:1932

C:\Windows\SysWOW64\cmd.exe
"cmd" /c ping 127.0.0.1 -n 13 > nul && copy "C:\Users\Admin\AppData\Local\Temp\Rfq_products order.exe" "C:\Users\Admin\AppData\Roaming\mssrce.exe" && ping 127.0.0.1 -n 13 > nul && "C:\Users\Admin\AppData\Roaming\mssrce.exe"
2⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:812

C:\Windows\SysWOW64\PING.EXE
ping 127.0.0.1 -n 13
3⤵
- Runs ping.exe
PID:1836

C:\Windows\SysWOW64\PING.EXE
ping 127.0.0.1 -n 13
3⤵
- Runs ping.exe
PID:1852

C:\Users\Admin\AppData\Roaming\mssrce.exe
"C:\Users\Admin\AppData\Roaming\mssrce.exe"
3⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:660

C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe
"C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe"
4⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
PID:1872

C:\Users\Admin\AppData\Local\Temp\mssrCE.exe
"C:\Users\Admin\AppData\Local\Temp\mssrCE.exe"
4⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1952

C:\Users\Admin\AppData\Local\Temp\mssrCE.exe
"C:\Users\Admin\AppData\Local\Temp\mssrCE.exe"
5⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1612

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Remote System Discovery

T1018

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe
MD5
6a673bfc3b67ae9782cb31af2f234c68

SHA1
7544e89566d91e84e3cd437b9a073e5f6b56566e

SHA256
978a4093058aa2ebf05dc353897d90d950324389879b57741b64160825b5ec0e

SHA512
72c302372ce87ceda2a3c70a6005d3f9c112f1641bc7fe6824c718971233e66c07e2996d2785fa358566c38714c25ea812c05c7cfd2f588284849d495fd24f39

Download Submit
C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe
MD5
6a673bfc3b67ae9782cb31af2f234c68

SHA1
7544e89566d91e84e3cd437b9a073e5f6b56566e

SHA256
978a4093058aa2ebf05dc353897d90d950324389879b57741b64160825b5ec0e

SHA512
72c302372ce87ceda2a3c70a6005d3f9c112f1641bc7fe6824c718971233e66c07e2996d2785fa358566c38714c25ea812c05c7cfd2f588284849d495fd24f39

Download Submit
C:\Users\Admin\AppData\Local\Temp\mssrCE.exe
MD5
0e362e7005823d0bec3719b902ed6d62

SHA1
590d860b909804349e0cdc2f1662b37bd62f7463

SHA256
2d0dc6216f613ac7551a7e70a798c22aee8eb9819428b1357e2b8c73bef905ad

SHA512
518991b68496b3f8545e418cf9b345e0791e09cc20d177b8aa47e0aba447aa55383c64f5bdaca39f2b061a5d08c16f2ad484af8a9f238ca23ab081618fba3ad3

Download Submit
C:\Users\Admin\AppData\Local\Temp\mssrCE.exe
MD5
0e362e7005823d0bec3719b902ed6d62

SHA1
590d860b909804349e0cdc2f1662b37bd62f7463

SHA256
2d0dc6216f613ac7551a7e70a798c22aee8eb9819428b1357e2b8c73bef905ad

SHA512
518991b68496b3f8545e418cf9b345e0791e09cc20d177b8aa47e0aba447aa55383c64f5bdaca39f2b061a5d08c16f2ad484af8a9f238ca23ab081618fba3ad3

Download Submit
C:\Users\Admin\AppData\Local\Temp\mssrCE.exe
MD5
0e362e7005823d0bec3719b902ed6d62

SHA1
590d860b909804349e0cdc2f1662b37bd62f7463

SHA256
2d0dc6216f613ac7551a7e70a798c22aee8eb9819428b1357e2b8c73bef905ad

SHA512
518991b68496b3f8545e418cf9b345e0791e09cc20d177b8aa47e0aba447aa55383c64f5bdaca39f2b061a5d08c16f2ad484af8a9f238ca23ab081618fba3ad3

Download Submit
C:\Users\Admin\AppData\Local\Temp\mssrCE.txt
MD5
ec62fab1a887151e0323e7ef7b2f6184

SHA1
6f3130347c9f3f073d013e85d35954f41de3dfd9

SHA256
f24ec17eb95126f7959ab20da105a17d522e7fcf234c8efe7123e69eb21aefaa

SHA512
7850f7ce28368253e070fcdcd013aaeda2b74cd039980a418c13a6c871044409f4bddd15571f945d85152c2d17292a5d4a833b18220b94149df751cea45035ea

Download Submit
C:\Users\Admin\AppData\Local\Temp\mssrCE.txt
MD5
4c24e8ec81dbe79174773f526d80928e

SHA1
2e1236013933b3ce9826d9564da10fbeeb24aa42

SHA256
b8cb42557c88c9bf37bd696688a004331d4c3759a27a67163e6cac0c9954301e

SHA512
45330d729b51c6adf034fd676f67616b2b7a7e6347146a796592a54571ce15465a8ce50cbac0eaedd2651a9119936cc30619845b483e5573e7176cefbab2680d

Download Submit
C:\Users\Admin\AppData\Local\Temp\mssrCE.txt
MD5
4c24e8ec81dbe79174773f526d80928e

SHA1
2e1236013933b3ce9826d9564da10fbeeb24aa42

SHA256
b8cb42557c88c9bf37bd696688a004331d4c3759a27a67163e6cac0c9954301e

SHA512
45330d729b51c6adf034fd676f67616b2b7a7e6347146a796592a54571ce15465a8ce50cbac0eaedd2651a9119936cc30619845b483e5573e7176cefbab2680d

Download Submit
C:\Users\Admin\AppData\Roaming\mssrce.exe
MD5
99b649db223cbef960a8423dd7d50381

SHA1
e4912bb05d068e6edbe5576a9a929d14590efbe3

SHA256
caf08c94a95672212ab753293db7e6ca97cec7ddc28ece68d978f3008a5a6668

SHA512
74b267dba2fd39d04165d4b80c2ca8a7fc04d2894c014c6bf059006874cb3f5ae937fbb12f26ddff81a5a8c8c7e8959c8a35cdd8b970f8affb4404df9041bfa0

Download Submit
C:\Users\Admin\AppData\Roaming\mssrce.exe
MD5
99b649db223cbef960a8423dd7d50381

SHA1
e4912bb05d068e6edbe5576a9a929d14590efbe3

SHA256
caf08c94a95672212ab753293db7e6ca97cec7ddc28ece68d978f3008a5a6668

SHA512
74b267dba2fd39d04165d4b80c2ca8a7fc04d2894c014c6bf059006874cb3f5ae937fbb12f26ddff81a5a8c8c7e8959c8a35cdd8b970f8affb4404df9041bfa0

Download Submit
\Users\Admin\AppData\Local\Temp\AddInProcess32.exe
MD5
6a673bfc3b67ae9782cb31af2f234c68

SHA1
7544e89566d91e84e3cd437b9a073e5f6b56566e

SHA256
978a4093058aa2ebf05dc353897d90d950324389879b57741b64160825b5ec0e

SHA512
72c302372ce87ceda2a3c70a6005d3f9c112f1641bc7fe6824c718971233e66c07e2996d2785fa358566c38714c25ea812c05c7cfd2f588284849d495fd24f39

Download Submit
\Users\Admin\AppData\Local\Temp\mssrCE.exe
MD5
0e362e7005823d0bec3719b902ed6d62

SHA1
590d860b909804349e0cdc2f1662b37bd62f7463

SHA256
2d0dc6216f613ac7551a7e70a798c22aee8eb9819428b1357e2b8c73bef905ad

SHA512
518991b68496b3f8545e418cf9b345e0791e09cc20d177b8aa47e0aba447aa55383c64f5bdaca39f2b061a5d08c16f2ad484af8a9f238ca23ab081618fba3ad3

Download Submit
\Users\Admin\AppData\Local\Temp\mssrCE.exe
MD5
0e362e7005823d0bec3719b902ed6d62

SHA1
590d860b909804349e0cdc2f1662b37bd62f7463

SHA256
2d0dc6216f613ac7551a7e70a798c22aee8eb9819428b1357e2b8c73bef905ad

SHA512
518991b68496b3f8545e418cf9b345e0791e09cc20d177b8aa47e0aba447aa55383c64f5bdaca39f2b061a5d08c16f2ad484af8a9f238ca23ab081618fba3ad3

Download Submit
\Users\Admin\AppData\Roaming\mssrce.exe
MD5
99b649db223cbef960a8423dd7d50381

SHA1
e4912bb05d068e6edbe5576a9a929d14590efbe3

SHA256
caf08c94a95672212ab753293db7e6ca97cec7ddc28ece68d978f3008a5a6668

SHA512
74b267dba2fd39d04165d4b80c2ca8a7fc04d2894c014c6bf059006874cb3f5ae937fbb12f26ddff81a5a8c8c7e8959c8a35cdd8b970f8affb4404df9041bfa0

Download Submit
memory/660-70-0x0000000004CE1000-0x0000000004CE2000-memory.dmp

Filesize
4KB

Download
memory/660-63-0x00000000009C0000-0x00000000009DA000-memory.dmp

Filesize
104KB

Download
memory/660-62-0x0000000004CE0000-0x0000000004CE1000-memory.dmp

Filesize
4KB

Download
memory/660-61-0x0000000000B80000-0x0000000000D0C000-memory.dmp

Filesize
1.5MB

Download
memory/660-64-0x0000000000B10000-0x0000000000B16000-memory.dmp

Filesize
24KB

Download
memory/944-54-0x00000000012C0000-0x000000000144C000-memory.dmp

Filesize
1.5MB

Download
memory/944-55-0x0000000000420000-0x0000000000452000-memory.dmp

Filesize
200KB

Download
memory/944-56-0x00000000004A0000-0x00000000004B6000-memory.dmp

Filesize
88KB

Download
memory/944-57-0x0000000004AF0000-0x0000000004AF1000-memory.dmp

Filesize
4KB

Download
memory/1872-71-0x0000000000400000-0x0000000000479000-memory.dmp

Filesize
484KB

Download
memory/1872-78-0x0000000076151000-0x0000000076153000-memory.dmp

Filesize
8KB

Download
memory/1872-79-0x0000000000400000-0x0000000000479000-memory.dmp

Filesize
484KB

Download
memory/1872-76-0x0000000000400000-0x0000000000479000-memory.dmp

Filesize
484KB

Download
memory/1872-73-0x0000000000400000-0x0000000000479000-memory.dmp

Filesize
484KB

Download
memory/1872-75-0x0000000000400000-0x0000000000479000-memory.dmp

Filesize
484KB

Download
memory/1872-74-0x0000000000400000-0x0000000000479000-memory.dmp

Filesize
484KB

Download
memory/1872-72-0x0000000000400000-0x0000000000479000-memory.dmp

Filesize
484KB

Download
memory/1872-68-0x0000000000400000-0x0000000000479000-memory.dmp

Filesize
484KB

Download
memory/1872-69-0x0000000000400000-0x0000000000479000-memory.dmp

Filesize
484KB

Download
memory/1872-67-0x0000000000400000-0x0000000000479000-memory.dmp

Filesize
484KB

Download
memory/1952-83-0x0000000000E30000-0x0000000000E4A000-memory.dmp

Filesize
104KB

Download