remcos | f7361813973bf5358dfe900784ab0c2cddd70ad3c1bfdeac1b1de494ffb2a3fa

General

Target

OUR REF NO. S03593.pdf.exe
Size

1.0MB
MD5

6ffcaa9d57ed36d74cac808ffc5fc9b6
SHA1

89c88ac7b1420300e2f63b5a7f863c7f672ba959
SHA256

f7361813973bf5358dfe900784ab0c2cddd70ad3c1bfdeac1b1de494ffb2a3fa
SHA512

49f0afba5127f6caef4a78c3c1450c362543fa88b6eb9921d3621760912914b21aa19e55c3e780c13b21693e645bd151eeb83d58e03746f26434decf8d434676
SSDEEP

24576:y/OFMbQyXyXhZVTR0z71BM2TRkB6huiR3BSpNoVf0LTsIBMNjnNNOhAe/S0:dHyXyXQHFTRkB6hulb80

Score

10^/10

remcos xp persistence rat

Malware Config

Extracted

Family

remcos

Botnet

XP

C2

xpremcuz300622.ddns.net:3542

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
oos.exe
delete_file
false
hide_file
true
hide_keylog_file
false
install_flag
true
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Remcos-MMP2I7
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
kkl
take_screenshot_option
false
take_screenshot_time
5

Signatures

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

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

OUR REF NO. S03593.pdf.exeWScript.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\International\Geo\Nation	OUR REF NO. S03593.pdf.exe
Key value queried	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 4 IoCs

Processes:

oos.exeoos.exeoos.exeoos.exe

pid process

2000 oos.exe
4328 oos.exe
4444 oos.exe
4356 oos.exe

pid	process
2000	oos.exe
4328	oos.exe
4444	oos.exe
4356	oos.exe

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

OUR REF NO. S03593.pdf.exeoos.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Windows\CurrentVersion\Run\	OUR REF NO. S03593.pdf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	OUR REF NO. S03593.pdf.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	OUR REF NO. S03593.pdf.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	OUR REF NO. S03593.pdf.exe
Key created	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Windows\CurrentVersion\Run\	oos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	oos.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	oos.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	oos.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

OUR REF NO. S03593.pdf.exeoos.exe

description	pid	process	target process
PID 2376 set thread context of 4124	2376	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 2000 set thread context of 4356	2000	oos.exe	oos.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Modifies registry class 1 IoCs

Processes:

OUR REF NO. S03593.pdf.exe

description ioc process

Key created \REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000_Classes\Local Settings OUR REF NO. S03593.pdf.exe
Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

OUR REF NO. S03593.pdf.exeoos.exe

pid process

2376 OUR REF NO. S03593.pdf.exe
2376 OUR REF NO. S03593.pdf.exe
2000 oos.exe
2000 oos.exe
2000 oos.exe
2000 oos.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000_Classes\Local Settings	OUR REF NO. S03593.pdf.exe

pid	process
2376	OUR REF NO. S03593.pdf.exe
2376	OUR REF NO. S03593.pdf.exe
2000	oos.exe
2000	oos.exe
2000	oos.exe
2000	oos.exe

Suspicious use of AdjustPrivilegeToken 12 IoCs

Processes:

OUR REF NO. S03593.pdf.exeoos.exe

description	pid	process
Token: SeBackupPrivilege	2376	OUR REF NO. S03593.pdf.exe
Token: SeSecurityPrivilege	2376	OUR REF NO. S03593.pdf.exe
Token: SeSecurityPrivilege	2376	OUR REF NO. S03593.pdf.exe
Token: SeBackupPrivilege	2376	OUR REF NO. S03593.pdf.exe
Token: SeSecurityPrivilege	2376	OUR REF NO. S03593.pdf.exe
Token: SeDebugPrivilege	2376	OUR REF NO. S03593.pdf.exe
Token: SeBackupPrivilege	2000	oos.exe
Token: SeSecurityPrivilege	2000	oos.exe
Token: SeSecurityPrivilege	2000	oos.exe
Token: SeBackupPrivilege	2000	oos.exe
Token: SeSecurityPrivilege	2000	oos.exe
Token: SeDebugPrivilege	2000	oos.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

oos.exe

pid process

4356 oos.exe

pid	process
4356	oos.exe

Suspicious use of WriteProcessMemory 42 IoCs

Processes:

OUR REF NO. S03593.pdf.exeOUR REF NO. S03593.pdf.exeWScript.execmd.exeoos.exe

description	pid	process	target process
PID 2376 wrote to memory of 2668	2376	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 2376 wrote to memory of 2668	2376	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 2376 wrote to memory of 2668	2376	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 2376 wrote to memory of 4124	2376	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 2376 wrote to memory of 4124	2376	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 2376 wrote to memory of 4124	2376	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 2376 wrote to memory of 4124	2376	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 2376 wrote to memory of 4124	2376	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 2376 wrote to memory of 4124	2376	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 2376 wrote to memory of 4124	2376	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 2376 wrote to memory of 4124	2376	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 2376 wrote to memory of 4124	2376	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 2376 wrote to memory of 4124	2376	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 2376 wrote to memory of 4124	2376	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 2376 wrote to memory of 4124	2376	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 4124 wrote to memory of 4592	4124	OUR REF NO. S03593.pdf.exe	WScript.exe
PID 4124 wrote to memory of 4592	4124	OUR REF NO. S03593.pdf.exe	WScript.exe
PID 4124 wrote to memory of 4592	4124	OUR REF NO. S03593.pdf.exe	WScript.exe
PID 4592 wrote to memory of 4432	4592	WScript.exe	cmd.exe
PID 4592 wrote to memory of 4432	4592	WScript.exe	cmd.exe
PID 4592 wrote to memory of 4432	4592	WScript.exe	cmd.exe
PID 4432 wrote to memory of 2000	4432	cmd.exe	oos.exe
PID 4432 wrote to memory of 2000	4432	cmd.exe	oos.exe
PID 4432 wrote to memory of 2000	4432	cmd.exe	oos.exe
PID 2000 wrote to memory of 4328	2000	oos.exe	oos.exe
PID 2000 wrote to memory of 4328	2000	oos.exe	oos.exe
PID 2000 wrote to memory of 4328	2000	oos.exe	oos.exe
PID 2000 wrote to memory of 4444	2000	oos.exe	oos.exe
PID 2000 wrote to memory of 4444	2000	oos.exe	oos.exe
PID 2000 wrote to memory of 4444	2000	oos.exe	oos.exe
PID 2000 wrote to memory of 4356	2000	oos.exe	oos.exe
PID 2000 wrote to memory of 4356	2000	oos.exe	oos.exe
PID 2000 wrote to memory of 4356	2000	oos.exe	oos.exe
PID 2000 wrote to memory of 4356	2000	oos.exe	oos.exe
PID 2000 wrote to memory of 4356	2000	oos.exe	oos.exe
PID 2000 wrote to memory of 4356	2000	oos.exe	oos.exe
PID 2000 wrote to memory of 4356	2000	oos.exe	oos.exe
PID 2000 wrote to memory of 4356	2000	oos.exe	oos.exe
PID 2000 wrote to memory of 4356	2000	oos.exe	oos.exe
PID 2000 wrote to memory of 4356	2000	oos.exe	oos.exe
PID 2000 wrote to memory of 4356	2000	oos.exe	oos.exe
PID 2000 wrote to memory of 4356	2000	oos.exe	oos.exe

C:\Users\Admin\AppData\Local\Temp\OUR REF NO. S03593.pdf.exe
"C:\Users\Admin\AppData\Local\Temp\OUR REF NO. S03593.pdf.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2376

C:\Users\Admin\AppData\Local\Temp\OUR REF NO. S03593.pdf.exe
"{path}"
2⤵
PID:2668

C:\Users\Admin\AppData\Local\Temp\OUR REF NO. S03593.pdf.exe
"{path}"
2⤵
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4124

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
3⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4592

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\oos.exe"
4⤵
- Suspicious use of WriteProcessMemory
PID:4432

C:\Users\Admin\AppData\Roaming\oos.exe
C:\Users\Admin\AppData\Roaming\oos.exe
5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2000

C:\Users\Admin\AppData\Roaming\oos.exe
"{path}"
6⤵
- Executes dropped EXE
PID:4328

C:\Users\Admin\AppData\Roaming\oos.exe
"{path}"
6⤵
- Executes dropped EXE
PID:4444

C:\Users\Admin\AppData\Roaming\oos.exe
"{path}"
6⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetWindowsHookEx
PID:4356

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\ProgramData\remcos\logs.dat
Filesize
144B

MD5
ac66e1b0a0819069c0f73e7bba0a7373

SHA1
b6c79084a8dbbcf265e09410c95feb696e13c826

SHA256
41ef16062abf3ef4cc10959610f23187bd24aedbe6bf5bf04da213d1186881d8

SHA512
78c64251ddb90f02e81e908420e1afe889b7014f611ecc717ecc382facf91dd33b18964a8fd7778142fb20c0f3246773d8406171ea0c1619d0742c828c5eaf3d

Download Submit
C:\Users\Admin\AppData\Local\Temp\install.vbs
Filesize
398B

MD5
a5d3440f90cbfae712166e20870eaed7

SHA1
cc1e1a2945eb2ad475234344f7527ad9e9873647

SHA256
960a570da95b8d16809cbcc18e8ca4d81e16cb666354ddc1d572daf93f291f02

SHA512
d3136a280fbb326ccc5cb5ab1214aed8ccd6baa7f3f89ef9e0b5bf391a957dab2c121640bb056e6cbda0594f83133c4dbb4e1e2f0e290b44a401cd2cf8cfd4aa

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
1.0MB

MD5
6ffcaa9d57ed36d74cac808ffc5fc9b6

SHA1
89c88ac7b1420300e2f63b5a7f863c7f672ba959

SHA256
f7361813973bf5358dfe900784ab0c2cddd70ad3c1bfdeac1b1de494ffb2a3fa

SHA512
49f0afba5127f6caef4a78c3c1450c362543fa88b6eb9921d3621760912914b21aa19e55c3e780c13b21693e645bd151eeb83d58e03746f26434decf8d434676

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
1.0MB

MD5
6ffcaa9d57ed36d74cac808ffc5fc9b6

SHA1
89c88ac7b1420300e2f63b5a7f863c7f672ba959

SHA256
f7361813973bf5358dfe900784ab0c2cddd70ad3c1bfdeac1b1de494ffb2a3fa

SHA512
49f0afba5127f6caef4a78c3c1450c362543fa88b6eb9921d3621760912914b21aa19e55c3e780c13b21693e645bd151eeb83d58e03746f26434decf8d434676

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
1.0MB

MD5
6ffcaa9d57ed36d74cac808ffc5fc9b6

SHA1
89c88ac7b1420300e2f63b5a7f863c7f672ba959

SHA256
f7361813973bf5358dfe900784ab0c2cddd70ad3c1bfdeac1b1de494ffb2a3fa

SHA512
49f0afba5127f6caef4a78c3c1450c362543fa88b6eb9921d3621760912914b21aa19e55c3e780c13b21693e645bd151eeb83d58e03746f26434decf8d434676

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
1.0MB

MD5
6ffcaa9d57ed36d74cac808ffc5fc9b6

SHA1
89c88ac7b1420300e2f63b5a7f863c7f672ba959

SHA256
f7361813973bf5358dfe900784ab0c2cddd70ad3c1bfdeac1b1de494ffb2a3fa

SHA512
49f0afba5127f6caef4a78c3c1450c362543fa88b6eb9921d3621760912914b21aa19e55c3e780c13b21693e645bd151eeb83d58e03746f26434decf8d434676

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
1.0MB

MD5
6ffcaa9d57ed36d74cac808ffc5fc9b6

SHA1
89c88ac7b1420300e2f63b5a7f863c7f672ba959

SHA256
f7361813973bf5358dfe900784ab0c2cddd70ad3c1bfdeac1b1de494ffb2a3fa

SHA512
49f0afba5127f6caef4a78c3c1450c362543fa88b6eb9921d3621760912914b21aa19e55c3e780c13b21693e645bd151eeb83d58e03746f26434decf8d434676

Download Submit
memory/2000-157-0x0000000004E20000-0x0000000004E30000-memory.dmp

Filesize
64KB

Download
memory/2000-156-0x0000000004E20000-0x0000000004E30000-memory.dmp

Filesize
64KB

Download
memory/2376-138-0x00000000051E0000-0x0000000005236000-memory.dmp

Filesize
344KB

Download
memory/2376-139-0x0000000004E80000-0x0000000004E90000-memory.dmp

Filesize
64KB

Download
memory/2376-140-0x0000000004E80000-0x0000000004E90000-memory.dmp

Filesize
64KB

Download
memory/2376-137-0x0000000004EA0000-0x0000000004EAA000-memory.dmp

Filesize
40KB

Download
memory/2376-133-0x0000000000530000-0x000000000063A000-memory.dmp

Filesize
1.0MB

Download
memory/2376-136-0x0000000004F90000-0x000000000502C000-memory.dmp

Filesize
624KB

Download
memory/2376-135-0x0000000004EF0000-0x0000000004F82000-memory.dmp

Filesize
584KB

Download
memory/2376-134-0x0000000005400000-0x00000000059A4000-memory.dmp

Filesize
5.6MB

Download
memory/4124-143-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4124-151-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4124-150-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4124-141-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4124-144-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4356-165-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4356-172-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4356-167-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4356-168-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4356-169-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4356-170-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4356-171-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4356-164-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4356-178-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4356-181-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4356-182-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4356-162-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4356-189-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4356-190-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4356-197-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4356-198-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

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Downloads