remcos | caf08c94a95672212ab753293db7e6ca97cec7ddc28ece68d978f3008a5a6668

Analysis

max time kernel
147s
max time network
123s
platform
windows10_x64
resource
win10-en-20211208
submitted
26-01-2022 09:17

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

2436 mssrce.exe
972 AddInProcess32.exe
1952 mssrCE.exe
2824 mssrCE.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

mssrce.exe

description pid process target process

PID 2436 set thread context of 972 2436 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
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

2324 972 WerFault.exe AddInProcess32.exe
Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery
T1018

Processes:

PING.EXEPING.EXEPING.EXE

pid process

1696 PING.EXE
1536 PING.EXE
3596 PING.EXE

pid	process
2436	mssrce.exe
972	AddInProcess32.exe
1952	mssrCE.exe
2824	mssrCE.exe

description	pid	process	target process
PID 2436 set thread context of 972	2436	mssrce.exe	AddInProcess32.exe

pid	pid_target	process	target process
2324	972	WerFault.exe	AddInProcess32.exe

pid	process
1696	PING.EXE
1536	PING.EXE
3596	PING.EXE

Suspicious behavior: EnumeratesProcesses 37 IoCs

Processes:

Rfq_products order.exemssrce.exeWerFault.exemssrCE.exemssrCE.exe

pid	process
2700	Rfq_products order.exe
2700	Rfq_products order.exe
2700	Rfq_products order.exe
2700	Rfq_products order.exe
2700	Rfq_products order.exe
2700	Rfq_products order.exe
2700	Rfq_products order.exe
2700	Rfq_products order.exe
2700	Rfq_products order.exe
2700	Rfq_products order.exe
2700	Rfq_products order.exe
2700	Rfq_products order.exe
2700	Rfq_products order.exe
2700	Rfq_products order.exe
2700	Rfq_products order.exe
2436	mssrce.exe
2436	mssrce.exe
2436	mssrce.exe
2324	WerFault.exe
2324	WerFault.exe
2324	WerFault.exe
2324	WerFault.exe
2324	WerFault.exe
2324	WerFault.exe
2324	WerFault.exe
2324	WerFault.exe
2324	WerFault.exe
2324	WerFault.exe
2324	WerFault.exe
2324	WerFault.exe
2324	WerFault.exe
1952	mssrCE.exe
2824	mssrCE.exe
2824	mssrCE.exe
2824	mssrCE.exe
2436	mssrce.exe
2436	mssrce.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

Processes:

Rfq_products order.exemssrce.exeWerFault.exemssrCE.exemssrCE.exe

description	pid	process
Token: SeDebugPrivilege	2700	Rfq_products order.exe
Token: SeDebugPrivilege	2436	mssrce.exe
Token: SeRestorePrivilege	2324	WerFault.exe
Token: SeBackupPrivilege	2324	WerFault.exe
Token: SeDebugPrivilege	2324	WerFault.exe
Token: SeDebugPrivilege	1952	mssrCE.exe
Token: SeDebugPrivilege	2824	mssrCE.exe

Suspicious use of WriteProcessMemory 39 IoCs

Processes:

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

description	pid	process	target process
PID 2700 wrote to memory of 1184	2700	Rfq_products order.exe	cmd.exe
PID 2700 wrote to memory of 1184	2700	Rfq_products order.exe	cmd.exe
PID 2700 wrote to memory of 1184	2700	Rfq_products order.exe	cmd.exe
PID 1184 wrote to memory of 1696	1184	cmd.exe	PING.EXE
PID 1184 wrote to memory of 1696	1184	cmd.exe	PING.EXE
PID 1184 wrote to memory of 1696	1184	cmd.exe	PING.EXE
PID 2700 wrote to memory of 3284	2700	Rfq_products order.exe	cmd.exe
PID 2700 wrote to memory of 3284	2700	Rfq_products order.exe	cmd.exe
PID 2700 wrote to memory of 3284	2700	Rfq_products order.exe	cmd.exe
PID 3284 wrote to memory of 1536	3284	cmd.exe	PING.EXE
PID 3284 wrote to memory of 1536	3284	cmd.exe	PING.EXE
PID 3284 wrote to memory of 1536	3284	cmd.exe	PING.EXE
PID 3284 wrote to memory of 3596	3284	cmd.exe	PING.EXE
PID 3284 wrote to memory of 3596	3284	cmd.exe	PING.EXE
PID 3284 wrote to memory of 3596	3284	cmd.exe	PING.EXE
PID 1184 wrote to memory of 1336	1184	cmd.exe	reg.exe
PID 1184 wrote to memory of 1336	1184	cmd.exe	reg.exe
PID 1184 wrote to memory of 1336	1184	cmd.exe	reg.exe
PID 3284 wrote to memory of 2436	3284	cmd.exe	mssrce.exe
PID 3284 wrote to memory of 2436	3284	cmd.exe	mssrce.exe
PID 3284 wrote to memory of 2436	3284	cmd.exe	mssrce.exe
PID 2436 wrote to memory of 972	2436	mssrce.exe	AddInProcess32.exe
PID 2436 wrote to memory of 972	2436	mssrce.exe	AddInProcess32.exe
PID 2436 wrote to memory of 972	2436	mssrce.exe	AddInProcess32.exe
PID 2436 wrote to memory of 972	2436	mssrce.exe	AddInProcess32.exe
PID 2436 wrote to memory of 972	2436	mssrce.exe	AddInProcess32.exe
PID 2436 wrote to memory of 972	2436	mssrce.exe	AddInProcess32.exe
PID 2436 wrote to memory of 972	2436	mssrce.exe	AddInProcess32.exe
PID 2436 wrote to memory of 972	2436	mssrce.exe	AddInProcess32.exe
PID 2436 wrote to memory of 972	2436	mssrce.exe	AddInProcess32.exe
PID 2436 wrote to memory of 972	2436	mssrce.exe	AddInProcess32.exe
PID 2436 wrote to memory of 972	2436	mssrce.exe	AddInProcess32.exe
PID 2436 wrote to memory of 972	2436	mssrce.exe	AddInProcess32.exe
PID 2436 wrote to memory of 1952	2436	mssrce.exe	mssrCE.exe
PID 2436 wrote to memory of 1952	2436	mssrce.exe	mssrCE.exe
PID 2436 wrote to memory of 1952	2436	mssrce.exe	mssrCE.exe
PID 1952 wrote to memory of 2824	1952	mssrCE.exe	mssrCE.exe
PID 1952 wrote to memory of 2824	1952	mssrCE.exe	mssrCE.exe
PID 1952 wrote to memory of 2824	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:2700

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:1184

C:\Windows\SysWOW64\PING.EXE
ping 127.0.0.1 -n 10
3⤵
- Runs ping.exe
PID:1696

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:1336

C:\Windows\SysWOW64\cmd.exe
"cmd" /c ping 127.0.0.1 -n 8 > 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 8 > nul && "C:\Users\Admin\AppData\Roaming\mssrce.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:3284

C:\Windows\SysWOW64\PING.EXE
ping 127.0.0.1 -n 8
3⤵
- Runs ping.exe
PID:1536

C:\Windows\SysWOW64\PING.EXE
ping 127.0.0.1 -n 8
3⤵
- Runs ping.exe
PID:3596

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:2436

C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe
"C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe"
4⤵
- Executes dropped EXE
PID:972

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 972 -s 532
5⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2324

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: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:2824

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\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\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
d5695f2d37e5738eb84255ab02341545

SHA1
76086bc1b2c4b84d1f389cb434a24c88e3beddb9

SHA256
922946ab5d5719813b102219a9e983af837d9061ecc829a7ca987e07d8930111

SHA512
bb4c67a01721c8ba5f3cc8dd2cee549c1fbffa8c49ee029f894758628751f8d9b120be2e8928bf66d427444a900b6eacaba57c48a42a01bf8e9bcf35c9941040

Download Submit
C:\Users\Admin\AppData\Local\Temp\mssrCE.txt
MD5
7279a2b67eefb3e0389119ee52ec9a45

SHA1
f69f4e4d1af07d7658e942bf471c90e654b1c120

SHA256
4da15b6ac4079edfe9f120bdedf774352727b5375ca8d78b75a5a7778424458b

SHA512
bb1bd7f3b282ca237aba43a4a8053ef30f984b7a575029acec3d615087e543ce8068ffbce7fd4c9bb931bb664835dba960be5661ca58b8cd1c212aafadee4fa2

Download Submit
C:\Users\Admin\AppData\Local\Temp\mssrCE.txt
MD5
7279a2b67eefb3e0389119ee52ec9a45

SHA1
f69f4e4d1af07d7658e942bf471c90e654b1c120

SHA256
4da15b6ac4079edfe9f120bdedf774352727b5375ca8d78b75a5a7778424458b

SHA512
bb1bd7f3b282ca237aba43a4a8053ef30f984b7a575029acec3d615087e543ce8068ffbce7fd4c9bb931bb664835dba960be5661ca58b8cd1c212aafadee4fa2

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/972-143-0x0000000000500000-0x0000000000579000-memory.dmp

Filesize
484KB

Download
memory/972-138-0x0000000000500000-0x0000000000579000-memory.dmp

Filesize
484KB

Download
memory/1952-147-0x0000000000B10000-0x0000000000B2A000-memory.dmp

Filesize
104KB

Download
memory/2436-132-0x00000000060C1000-0x00000000060C2000-memory.dmp

Filesize
4KB

Download
memory/2436-130-0x00000000056E0000-0x0000000005A30000-memory.dmp

Filesize
3.3MB

Download
memory/2436-134-0x0000000004F60000-0x0000000004F66000-memory.dmp

Filesize
24KB

Download
memory/2436-135-0x00000000086A0000-0x00000000086C2000-memory.dmp

Filesize
136KB

Download
memory/2436-133-0x0000000004F40000-0x0000000004F5A000-memory.dmp

Filesize
104KB

Download
memory/2436-131-0x00000000060C0000-0x00000000060C1000-memory.dmp

Filesize
4KB

Download
memory/2700-124-0x0000000004EA0000-0x000000000539E000-memory.dmp

Filesize
5.0MB

Download
memory/2700-115-0x00000000003B0000-0x000000000053C000-memory.dmp

Filesize
1.5MB

Download
memory/2700-123-0x000000000B490000-0x000000000B49A000-memory.dmp

Filesize
40KB

Download
memory/2700-122-0x0000000004E70000-0x0000000004E86000-memory.dmp

Filesize
88KB

Download
memory/2700-121-0x0000000004E30000-0x0000000004E62000-memory.dmp

Filesize
200KB

Download
memory/2700-120-0x0000000004EA0000-0x000000000539E000-memory.dmp

Filesize
5.0MB

Download
memory/2700-119-0x00000000058A0000-0x000000000593C000-memory.dmp

Filesize
624KB

Download
memory/2700-118-0x0000000004EA0000-0x00000000051F0000-memory.dmp

Filesize
3.3MB

Download
memory/2700-117-0x0000000004D80000-0x0000000004E12000-memory.dmp

Filesize
584KB

Download
memory/2700-116-0x00000000053A0000-0x000000000589E000-memory.dmp

Filesize
5.0MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads