remcos | caf08c94a95672212ab753293db7e6ca97cec7ddc28ece68d978f3008a5a6668

Analysis

max time kernel
153s
max time network
159s
platform
windows10_x64
resource
win10-en-20211208
submitted
26-01-2022 15:00

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

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-1-5-21-369956170-74428499-1628131376-1000\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

4504 mssrce.exe
700 AddInProcess32.exe
1428 mssrCE.exe
1844 mssrCE.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

mssrce.exe

description pid process target process

PID 4504 set thread context of 700 4504 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

4148 PING.EXE
3192 PING.EXE
2792 PING.EXE

pid	process
4504	mssrce.exe
700	AddInProcess32.exe
1428	mssrCE.exe
1844	mssrCE.exe

description	pid	process	target process
PID 4504 set thread context of 700	4504	mssrce.exe	AddInProcess32.exe

pid	process
4148	PING.EXE
3192	PING.EXE
2792	PING.EXE

Suspicious behavior: EnumeratesProcesses 24 IoCs

Processes:

Rfq_products order.exemssrce.exemssrCE.exemssrCE.exe

pid	process
3376	Rfq_products order.exe
3376	Rfq_products order.exe
3376	Rfq_products order.exe
3376	Rfq_products order.exe
3376	Rfq_products order.exe
3376	Rfq_products order.exe
3376	Rfq_products order.exe
3376	Rfq_products order.exe
3376	Rfq_products order.exe
3376	Rfq_products order.exe
3376	Rfq_products order.exe
3376	Rfq_products order.exe
3376	Rfq_products order.exe
3376	Rfq_products order.exe
3376	Rfq_products order.exe
4504	mssrce.exe
4504	mssrce.exe
4504	mssrce.exe
1428	mssrCE.exe
1844	mssrCE.exe
1844	mssrCE.exe
1844	mssrCE.exe
4504	mssrce.exe
4504	mssrce.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

Rfq_products order.exemssrce.exemssrCE.exemssrCE.exe

description	pid	process
Token: SeDebugPrivilege	3376	Rfq_products order.exe
Token: SeDebugPrivilege	4504	mssrce.exe
Token: SeDebugPrivilege	1428	mssrCE.exe
Token: SeDebugPrivilege	1844	mssrCE.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

AddInProcess32.exe

pid process

700 AddInProcess32.exe

pid	process
700	AddInProcess32.exe

Suspicious use of WriteProcessMemory 39 IoCs

Processes:

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

description	pid	process	target process
PID 3376 wrote to memory of 2812	3376	Rfq_products order.exe	cmd.exe
PID 3376 wrote to memory of 2812	3376	Rfq_products order.exe	cmd.exe
PID 3376 wrote to memory of 2812	3376	Rfq_products order.exe	cmd.exe
PID 2812 wrote to memory of 4148	2812	cmd.exe	PING.EXE
PID 2812 wrote to memory of 4148	2812	cmd.exe	PING.EXE
PID 2812 wrote to memory of 4148	2812	cmd.exe	PING.EXE
PID 3376 wrote to memory of 4056	3376	Rfq_products order.exe	cmd.exe
PID 3376 wrote to memory of 4056	3376	Rfq_products order.exe	cmd.exe
PID 3376 wrote to memory of 4056	3376	Rfq_products order.exe	cmd.exe
PID 4056 wrote to memory of 3192	4056	cmd.exe	PING.EXE
PID 4056 wrote to memory of 3192	4056	cmd.exe	PING.EXE
PID 4056 wrote to memory of 3192	4056	cmd.exe	PING.EXE
PID 2812 wrote to memory of 4188	2812	cmd.exe	reg.exe
PID 2812 wrote to memory of 4188	2812	cmd.exe	reg.exe
PID 2812 wrote to memory of 4188	2812	cmd.exe	reg.exe
PID 4056 wrote to memory of 2792	4056	cmd.exe	PING.EXE
PID 4056 wrote to memory of 2792	4056	cmd.exe	PING.EXE
PID 4056 wrote to memory of 2792	4056	cmd.exe	PING.EXE
PID 4056 wrote to memory of 4504	4056	cmd.exe	mssrce.exe
PID 4056 wrote to memory of 4504	4056	cmd.exe	mssrce.exe
PID 4056 wrote to memory of 4504	4056	cmd.exe	mssrce.exe
PID 4504 wrote to memory of 700	4504	mssrce.exe	AddInProcess32.exe
PID 4504 wrote to memory of 700	4504	mssrce.exe	AddInProcess32.exe
PID 4504 wrote to memory of 700	4504	mssrce.exe	AddInProcess32.exe
PID 4504 wrote to memory of 700	4504	mssrce.exe	AddInProcess32.exe
PID 4504 wrote to memory of 700	4504	mssrce.exe	AddInProcess32.exe
PID 4504 wrote to memory of 700	4504	mssrce.exe	AddInProcess32.exe
PID 4504 wrote to memory of 700	4504	mssrce.exe	AddInProcess32.exe
PID 4504 wrote to memory of 700	4504	mssrce.exe	AddInProcess32.exe
PID 4504 wrote to memory of 700	4504	mssrce.exe	AddInProcess32.exe
PID 4504 wrote to memory of 700	4504	mssrce.exe	AddInProcess32.exe
PID 4504 wrote to memory of 700	4504	mssrce.exe	AddInProcess32.exe
PID 4504 wrote to memory of 700	4504	mssrce.exe	AddInProcess32.exe
PID 4504 wrote to memory of 1428	4504	mssrce.exe	mssrCE.exe
PID 4504 wrote to memory of 1428	4504	mssrce.exe	mssrCE.exe
PID 4504 wrote to memory of 1428	4504	mssrce.exe	mssrCE.exe
PID 1428 wrote to memory of 1844	1428	mssrCE.exe	mssrCE.exe
PID 1428 wrote to memory of 1844	1428	mssrCE.exe	mssrCE.exe
PID 1428 wrote to memory of 1844	1428	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:3376

C:\Windows\SysWOW64\cmd.exe
"cmd" /c ping 127.0.0.1 -n 9 > 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:2812

C:\Windows\SysWOW64\PING.EXE
ping 127.0.0.1 -n 9
3⤵
- Runs ping.exe
PID:4148

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:4188

C:\Windows\SysWOW64\cmd.exe
"cmd" /c ping 127.0.0.1 -n 18 > 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 18 > nul && "C:\Users\Admin\AppData\Roaming\mssrce.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:4056

C:\Windows\SysWOW64\PING.EXE
ping 127.0.0.1 -n 18
3⤵
- Runs ping.exe
PID:3192

C:\Windows\SysWOW64\PING.EXE
ping 127.0.0.1 -n 18
3⤵
- Runs ping.exe
PID:2792

C:\Users\Admin\AppData\Roaming\mssrce.exe
"C:\Users\Admin\AppData\Roaming\mssrce.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4504

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:700

C:\Users\Admin\AppData\Local\Temp\mssrCE.exe
"C:\Users\Admin\AppData\Local\Temp\mssrCE.exe"
4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1428

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:1844

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\mssrCE.exe.log
MD5
e555c48cb712a9597ecb55a60135d1f8

SHA1
2081c72d30c34ec3f61f9944545ecdaae11521f7

SHA256
815c80df060afa8acf7640ca011735ef77c66666d03901e04a8767827d5da4e9

SHA512
32129b5be15217e5400f1e7536270a703d62db60ebb06396b9d74703e6a0dcd2e78f7f42b2019093be1508a9310912f305b88de274a295c9135a4086cd8c8427

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
b8f630a67d764f3f17b8e8a529464403

SHA1
9089b0f40507e005510e12417229c6db177422aa

SHA256
ae0ba81265ab54873d36d5b5ef0a8550161baaaa81bb0ef892b824b32e54aa04

SHA512
f333f88d4941a498cf9070951539001e0c923fd473d9100396c68d8feb8c5f005d100fd4e7ab567760b465aa0c428a252453a359851d8a05add4dec94f64960a

Download Submit
C:\Users\Admin\AppData\Local\Temp\mssrCE.txt
MD5
d23c01ebc5cb1015e65ff08d128b5fa2

SHA1
f562a255bc833a834632f13101a869543ced9e94

SHA256
01704fd0732206b670186352f8f42f57e152cd1d5edb5bdff67dcd70044a89fb

SHA512
f28fee996c3ba155b1db5c0001cc3e483b8fa66edc2748eb154fa939c41ec0f6a1f7336ef35067ce212237628597b03184178a0411921c853ff8595d0a0f6798

Download Submit
C:\Users\Admin\AppData\Local\Temp\mssrCE.txt
MD5
d23c01ebc5cb1015e65ff08d128b5fa2

SHA1
f562a255bc833a834632f13101a869543ced9e94

SHA256
01704fd0732206b670186352f8f42f57e152cd1d5edb5bdff67dcd70044a89fb

SHA512
f28fee996c3ba155b1db5c0001cc3e483b8fa66edc2748eb154fa939c41ec0f6a1f7336ef35067ce212237628597b03184178a0411921c853ff8595d0a0f6798

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
memory/700-144-0x0000000000400000-0x0000000000479000-memory.dmp

Filesize
484KB

Download
memory/700-133-0x0000000000400000-0x0000000000479000-memory.dmp

Filesize
484KB

Download
memory/1428-147-0x0000000000690000-0x00000000006AA000-memory.dmp

Filesize
104KB

Download
memory/3376-122-0x0000000005960000-0x0000000005E5E000-memory.dmp

Filesize
5.0MB

Download
memory/3376-121-0x0000000005E40000-0x0000000005E56000-memory.dmp

Filesize
88KB

Download
memory/3376-116-0x0000000005E60000-0x000000000635E000-memory.dmp

Filesize
5.0MB

Download
memory/3376-117-0x0000000005A00000-0x0000000005A92000-memory.dmp

Filesize
584KB

Download
memory/3376-118-0x0000000005AA0000-0x0000000005DF0000-memory.dmp

Filesize
3.3MB

Download
memory/3376-119-0x0000000006400000-0x000000000649C000-memory.dmp

Filesize
624KB

Download
memory/3376-120-0x0000000005E00000-0x0000000005E32000-memory.dmp

Filesize
200KB

Download
memory/3376-124-0x0000000005960000-0x0000000005E5E000-memory.dmp

Filesize
5.0MB

Download
memory/3376-123-0x000000000C060000-0x000000000C06A000-memory.dmp

Filesize
40KB

Download
memory/3376-115-0x0000000000ED0000-0x000000000105C000-memory.dmp

Filesize
1.5MB

Download
memory/4504-129-0x0000000001B20000-0x0000000001BB2000-memory.dmp

Filesize
584KB

Download
memory/4504-127-0x0000000005BF0000-0x0000000005F40000-memory.dmp

Filesize
3.3MB

Download
memory/4504-128-0x0000000001B20000-0x0000000001BB2000-memory.dmp

Filesize
584KB

Download
memory/4504-132-0x0000000008B20000-0x0000000008B42000-memory.dmp

Filesize
136KB

Download
memory/4504-131-0x0000000001A60000-0x0000000001A66000-memory.dmp

Filesize
24KB

Download
memory/4504-130-0x0000000001A40000-0x0000000001A5A000-memory.dmp

Filesize
104KB

Download