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
Executes dropped EXE 2 IoCs

Processes:

oos.exeoos.exe

pid process

876 oos.exe
1224 oos.exe
Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

1716 cmd.exe

pid	process
876	oos.exe
1224	oos.exe

pid	process
1716	cmd.exe

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

oos.exeOUR REF NO. S03593.pdf.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3499517378-2376672570-1134980332-1000\Software\Microsoft\Windows\CurrentVersion\Run\	oos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3499517378-2376672570-1134980332-1000\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
Key created	\REGISTRY\USER\S-1-5-21-3499517378-2376672570-1134980332-1000\Software\Microsoft\Windows\CurrentVersion\Run\	OUR REF NO. S03593.pdf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3499517378-2376672570-1134980332-1000\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

Suspicious use of SetThreadContext 2 IoCs

Processes:

OUR REF NO. S03593.pdf.exeoos.exe

description	pid	process	target process
PID 1996 set thread context of 520	1996	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 876 set thread context of 1224	876	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
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

OUR REF NO. S03593.pdf.exe

pid process

1996 OUR REF NO. S03593.pdf.exe
1996 OUR REF NO. S03593.pdf.exe

pid	process
1996	OUR REF NO. S03593.pdf.exe
1996	OUR REF NO. S03593.pdf.exe

Suspicious use of AdjustPrivilegeToken 11 IoCs

Processes:

OUR REF NO. S03593.pdf.exeoos.exe

description	pid	process
Token: SeBackupPrivilege	1996	OUR REF NO. S03593.pdf.exe
Token: SeSecurityPrivilege	1996	OUR REF NO. S03593.pdf.exe
Token: SeSecurityPrivilege	1996	OUR REF NO. S03593.pdf.exe
Token: SeBackupPrivilege	1996	OUR REF NO. S03593.pdf.exe
Token: SeSecurityPrivilege	1996	OUR REF NO. S03593.pdf.exe
Token: SeDebugPrivilege	1996	OUR REF NO. S03593.pdf.exe
Token: SeBackupPrivilege	876	oos.exe
Token: SeSecurityPrivilege	876	oos.exe
Token: SeSecurityPrivilege	876	oos.exe
Token: SeBackupPrivilege	876	oos.exe
Token: SeSecurityPrivilege	876	oos.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

oos.exe

pid process

1224 oos.exe

pid	process
1224	oos.exe

Suspicious use of WriteProcessMemory 46 IoCs

Processes:

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

description	pid	process	target process
PID 1996 wrote to memory of 2040	1996	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 1996 wrote to memory of 2040	1996	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 1996 wrote to memory of 2040	1996	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 1996 wrote to memory of 2040	1996	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 1996 wrote to memory of 1172	1996	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 1996 wrote to memory of 1172	1996	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 1996 wrote to memory of 1172	1996	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 1996 wrote to memory of 1172	1996	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 1996 wrote to memory of 520	1996	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 1996 wrote to memory of 520	1996	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 1996 wrote to memory of 520	1996	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 1996 wrote to memory of 520	1996	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 1996 wrote to memory of 520	1996	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 1996 wrote to memory of 520	1996	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 1996 wrote to memory of 520	1996	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 1996 wrote to memory of 520	1996	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 1996 wrote to memory of 520	1996	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 1996 wrote to memory of 520	1996	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 1996 wrote to memory of 520	1996	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 1996 wrote to memory of 520	1996	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 1996 wrote to memory of 520	1996	OUR REF NO. S03593.pdf.exe	OUR REF NO. S03593.pdf.exe
PID 520 wrote to memory of 1360	520	OUR REF NO. S03593.pdf.exe	WScript.exe
PID 520 wrote to memory of 1360	520	OUR REF NO. S03593.pdf.exe	WScript.exe
PID 520 wrote to memory of 1360	520	OUR REF NO. S03593.pdf.exe	WScript.exe
PID 520 wrote to memory of 1360	520	OUR REF NO. S03593.pdf.exe	WScript.exe
PID 1360 wrote to memory of 1716	1360	WScript.exe	cmd.exe
PID 1360 wrote to memory of 1716	1360	WScript.exe	cmd.exe
PID 1360 wrote to memory of 1716	1360	WScript.exe	cmd.exe
PID 1360 wrote to memory of 1716	1360	WScript.exe	cmd.exe
PID 1716 wrote to memory of 876	1716	cmd.exe	oos.exe
PID 1716 wrote to memory of 876	1716	cmd.exe	oos.exe
PID 1716 wrote to memory of 876	1716	cmd.exe	oos.exe
PID 1716 wrote to memory of 876	1716	cmd.exe	oos.exe
PID 876 wrote to memory of 1224	876	oos.exe	oos.exe
PID 876 wrote to memory of 1224	876	oos.exe	oos.exe
PID 876 wrote to memory of 1224	876	oos.exe	oos.exe
PID 876 wrote to memory of 1224	876	oos.exe	oos.exe
PID 876 wrote to memory of 1224	876	oos.exe	oos.exe
PID 876 wrote to memory of 1224	876	oos.exe	oos.exe
PID 876 wrote to memory of 1224	876	oos.exe	oos.exe
PID 876 wrote to memory of 1224	876	oos.exe	oos.exe
PID 876 wrote to memory of 1224	876	oos.exe	oos.exe
PID 876 wrote to memory of 1224	876	oos.exe	oos.exe
PID 876 wrote to memory of 1224	876	oos.exe	oos.exe
PID 876 wrote to memory of 1224	876	oos.exe	oos.exe
PID 876 wrote to memory of 1224	876	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:1996

C:\Users\Admin\AppData\Local\Temp\OUR REF NO. S03593.pdf.exe
"{path}"
2⤵
PID:2040

C:\Users\Admin\AppData\Local\Temp\OUR REF NO. S03593.pdf.exe
"{path}"
2⤵
PID:1172

C:\Users\Admin\AppData\Local\Temp\OUR REF NO. S03593.pdf.exe
"{path}"
2⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:520

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
3⤵
- Suspicious use of WriteProcessMemory
PID:1360

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\oos.exe"
4⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1716

C:\Users\Admin\AppData\Roaming\oos.exe
C:\Users\Admin\AppData\Roaming\oos.exe
5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:876

C:\Users\Admin\AppData\Roaming\oos.exe
"{path}"
6⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetWindowsHookEx
PID:1224

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

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

MD5
9acdf6d4778b9a6e2c2cb368dd05b12a

SHA1
7277d420445e378f3304fa2c94f1070efafb1f35

SHA256
fbe3330353bc3017fcaf6e9ccc695f93eed9f5a447de3ef2a90cb6c0efb39094

SHA512
f9e2e90c47023f8c18432af2422cfb50b10e61e56bd5f6a6c22a157f5570474bc8491e8af720c12efd01ab825e083031674651dcf284dd2aca4614002ced7150

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
\Users\Admin\AppData\Roaming\oos.exe
Filesize
1.0MB

MD5
6ffcaa9d57ed36d74cac808ffc5fc9b6

SHA1
89c88ac7b1420300e2f63b5a7f863c7f672ba959

SHA256
f7361813973bf5358dfe900784ab0c2cddd70ad3c1bfdeac1b1de494ffb2a3fa

SHA512
49f0afba5127f6caef4a78c3c1450c362543fa88b6eb9921d3621760912914b21aa19e55c3e780c13b21693e645bd151eeb83d58e03746f26434decf8d434676

Download Submit
memory/520-65-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/520-79-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/520-62-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/520-63-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/520-64-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/520-61-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/520-66-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/520-67-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/520-68-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/520-69-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/520-70-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/520-72-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/520-78-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/876-85-0x00000000049B0000-0x00000000049F0000-memory.dmp

Filesize
256KB

Download
memory/876-84-0x00000000002B0000-0x00000000003BA000-memory.dmp

Filesize
1.0MB

Download
memory/876-86-0x00000000049B0000-0x00000000049F0000-memory.dmp

Filesize
256KB

Download
memory/1224-103-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1224-123-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1224-129-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1224-104-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1224-122-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1224-115-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1224-95-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1224-99-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1224-100-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1224-102-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1224-130-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1224-114-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1224-107-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1224-106-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1224-105-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1224-109-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1224-113-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1996-57-0x0000000004C60000-0x0000000004D30000-memory.dmp

Filesize
832KB

Download
memory/1996-56-0x00000000004A0000-0x00000000004AE000-memory.dmp

Filesize
56KB

Download
memory/1996-55-0x0000000001EC0000-0x0000000001F00000-memory.dmp

Filesize
256KB

Download
memory/1996-59-0x0000000005E30000-0x0000000005EEE000-memory.dmp

Filesize
760KB

Download
memory/1996-54-0x00000000001E0000-0x00000000002EA000-memory.dmp

Filesize
1.0MB

Download
memory/1996-58-0x0000000001EC0000-0x0000000001F00000-memory.dmp

Filesize
256KB

Download
memory/1996-60-0x0000000007CF0000-0x0000000007D6A000-memory.dmp

Filesize
488KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

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Downloads