remcos | 6361315cefbde08b7a1dc646cbc9ee09c3f57de65a1f7e05d3d1b7b986b2e7fb

General

Target

tmp.exe
Size

1.2MB
MD5

d789b2e872b82af29170b174c3b9e97f
SHA1

4e3dff1e7dbff7a96012667d00fca66d0fe7fb15
SHA256

6361315cefbde08b7a1dc646cbc9ee09c3f57de65a1f7e05d3d1b7b986b2e7fb
SHA512

462b0dca74c3a4707d76866aaaea4755e4644b27f22870f04f90b62943a216b775f4a7524c9b05a5fad5ca293c83e61f3c8bd0c0e310395ae5d1e02cd83ee302
SSDEEP

24576:ERF0YvDgAgMI0csDuyNsdsTDD27bIclWWJ+rk9EWy4/kgwJ/Y4DmFusePSgzPkns:ERFl0Ag70csDumPnK7bIcgWQQ9Ly4pi

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:

tmp.exeWScript.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\Control Panel\International\Geo\Nation	tmp.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 2 IoCs

Processes:

oos.exeoos.exe

pid process

1428 oos.exe
3732 oos.exe

pid	process
1428	oos.exe
3732	oos.exe

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

oos.exetmp.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\Software\Microsoft\Windows\CurrentVersion\Run\	oos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\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-1-5-21-2805025096-2326403612-4231045514-1000\Software\Microsoft\Windows\CurrentVersion\Run\	tmp.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	tmp.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	tmp.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	tmp.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

tmp.exeoos.exe

description pid process target process

PID 2124 set thread context of 3980 2124 tmp.exe tmp.exe
PID 1428 set thread context of 3732 1428 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:

tmp.exe

description ioc process

Key created \REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000_Classes\Local Settings tmp.exe
Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

tmp.exeoos.exe

pid process

2124 tmp.exe
2124 tmp.exe
2124 tmp.exe
1428 oos.exe
1428 oos.exe
1428 oos.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

tmp.exeoos.exe

description pid process

Token: SeDebugPrivilege 2124 tmp.exe
Token: SeDebugPrivilege 1428 oos.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

oos.exe

pid process

3732 oos.exe

description	pid	process	target process
PID 2124 set thread context of 3980	2124	tmp.exe	tmp.exe
PID 1428 set thread context of 3732	1428	oos.exe	oos.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000_Classes\Local Settings	tmp.exe

pid	process
2124	tmp.exe
2124	tmp.exe
2124	tmp.exe
1428	oos.exe
1428	oos.exe
1428	oos.exe

description	pid	process
Token: SeDebugPrivilege	2124	tmp.exe
Token: SeDebugPrivilege	1428	oos.exe

pid	process
3732	oos.exe

Suspicious use of WriteProcessMemory 33 IoCs

Processes:

tmp.exetmp.exeWScript.execmd.exeoos.exe

description	pid	process	target process
PID 2124 wrote to memory of 3980	2124	tmp.exe	tmp.exe
PID 2124 wrote to memory of 3980	2124	tmp.exe	tmp.exe
PID 2124 wrote to memory of 3980	2124	tmp.exe	tmp.exe
PID 2124 wrote to memory of 3980	2124	tmp.exe	tmp.exe
PID 2124 wrote to memory of 3980	2124	tmp.exe	tmp.exe
PID 2124 wrote to memory of 3980	2124	tmp.exe	tmp.exe
PID 2124 wrote to memory of 3980	2124	tmp.exe	tmp.exe
PID 2124 wrote to memory of 3980	2124	tmp.exe	tmp.exe
PID 2124 wrote to memory of 3980	2124	tmp.exe	tmp.exe
PID 2124 wrote to memory of 3980	2124	tmp.exe	tmp.exe
PID 2124 wrote to memory of 3980	2124	tmp.exe	tmp.exe
PID 2124 wrote to memory of 3980	2124	tmp.exe	tmp.exe
PID 3980 wrote to memory of 3240	3980	tmp.exe	WScript.exe
PID 3980 wrote to memory of 3240	3980	tmp.exe	WScript.exe
PID 3980 wrote to memory of 3240	3980	tmp.exe	WScript.exe
PID 3240 wrote to memory of 4484	3240	WScript.exe	cmd.exe
PID 3240 wrote to memory of 4484	3240	WScript.exe	cmd.exe
PID 3240 wrote to memory of 4484	3240	WScript.exe	cmd.exe
PID 4484 wrote to memory of 1428	4484	cmd.exe	oos.exe
PID 4484 wrote to memory of 1428	4484	cmd.exe	oos.exe
PID 4484 wrote to memory of 1428	4484	cmd.exe	oos.exe
PID 1428 wrote to memory of 3732	1428	oos.exe	oos.exe
PID 1428 wrote to memory of 3732	1428	oos.exe	oos.exe
PID 1428 wrote to memory of 3732	1428	oos.exe	oos.exe
PID 1428 wrote to memory of 3732	1428	oos.exe	oos.exe
PID 1428 wrote to memory of 3732	1428	oos.exe	oos.exe
PID 1428 wrote to memory of 3732	1428	oos.exe	oos.exe
PID 1428 wrote to memory of 3732	1428	oos.exe	oos.exe
PID 1428 wrote to memory of 3732	1428	oos.exe	oos.exe
PID 1428 wrote to memory of 3732	1428	oos.exe	oos.exe
PID 1428 wrote to memory of 3732	1428	oos.exe	oos.exe
PID 1428 wrote to memory of 3732	1428	oos.exe	oos.exe
PID 1428 wrote to memory of 3732	1428	oos.exe	oos.exe

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2124

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
2⤵
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:3980

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:3240

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\oos.exe"
4⤵
- Suspicious use of WriteProcessMemory
PID:4484

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:1428

C:\Users\Admin\AppData\Roaming\oos.exe
"C:\Users\Admin\AppData\Roaming\oos.exe"
6⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetWindowsHookEx
PID:3732

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
2aa33bac4a79231a27386524f5f403c9

SHA1
ae2543994af135a1ee2ab02e26eecc58deb8ad1e

SHA256
af88bbcdbc62e7d9b53cd9c3936e238480771e483599df95e8328156b5ce8a41

SHA512
945d0182879bc0e7e564e2aa8b0a3dfcf32967bd29ea9b7ed7dd2ebeb16b9b8b9a8b6b65da590c7d2154f8c01a5e92ab568543dbcf96c7cb488e88c6f8577f31

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
1.2MB

MD5
d789b2e872b82af29170b174c3b9e97f

SHA1
4e3dff1e7dbff7a96012667d00fca66d0fe7fb15

SHA256
6361315cefbde08b7a1dc646cbc9ee09c3f57de65a1f7e05d3d1b7b986b2e7fb

SHA512
462b0dca74c3a4707d76866aaaea4755e4644b27f22870f04f90b62943a216b775f4a7524c9b05a5fad5ca293c83e61f3c8bd0c0e310395ae5d1e02cd83ee302

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
1.2MB

MD5
d789b2e872b82af29170b174c3b9e97f

SHA1
4e3dff1e7dbff7a96012667d00fca66d0fe7fb15

SHA256
6361315cefbde08b7a1dc646cbc9ee09c3f57de65a1f7e05d3d1b7b986b2e7fb

SHA512
462b0dca74c3a4707d76866aaaea4755e4644b27f22870f04f90b62943a216b775f4a7524c9b05a5fad5ca293c83e61f3c8bd0c0e310395ae5d1e02cd83ee302

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
1.2MB

MD5
d789b2e872b82af29170b174c3b9e97f

SHA1
4e3dff1e7dbff7a96012667d00fca66d0fe7fb15

SHA256
6361315cefbde08b7a1dc646cbc9ee09c3f57de65a1f7e05d3d1b7b986b2e7fb

SHA512
462b0dca74c3a4707d76866aaaea4755e4644b27f22870f04f90b62943a216b775f4a7524c9b05a5fad5ca293c83e61f3c8bd0c0e310395ae5d1e02cd83ee302

Download Submit
memory/1428-156-0x0000000004B10000-0x0000000004B20000-memory.dmp

Filesize
64KB

Download
memory/1428-157-0x0000000004B10000-0x0000000004B20000-memory.dmp

Filesize
64KB

Download
memory/2124-134-0x0000000005E50000-0x00000000063F4000-memory.dmp

Filesize
5.6MB

Download
memory/2124-136-0x0000000005C10000-0x0000000005C1A000-memory.dmp

Filesize
40KB

Download
memory/2124-137-0x0000000001830000-0x0000000001840000-memory.dmp

Filesize
64KB

Download
memory/2124-138-0x0000000008670000-0x0000000008816000-memory.dmp

Filesize
1.6MB

Download
memory/2124-139-0x0000000001830000-0x0000000001840000-memory.dmp

Filesize
64KB

Download
memory/2124-140-0x0000000008540000-0x00000000085DC000-memory.dmp

Filesize
624KB

Download
memory/2124-135-0x0000000005A80000-0x0000000005B12000-memory.dmp

Filesize
584KB

Download
memory/2124-133-0x0000000000BE0000-0x0000000000D24000-memory.dmp

Filesize
1.3MB

Download
memory/3732-179-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3732-189-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3732-165-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3732-166-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3732-167-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3732-168-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3732-169-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3732-172-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3732-173-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3732-174-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3732-175-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3732-177-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3732-178-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3732-162-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3732-181-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3732-182-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3732-183-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3732-160-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3732-185-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3732-186-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3732-187-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3732-163-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3732-190-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3732-191-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3732-192-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3732-194-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3732-195-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3732-196-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3732-198-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3732-199-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3732-200-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3732-202-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3732-203-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3732-204-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3732-206-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3732-207-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3980-141-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3980-143-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3980-144-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3980-150-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3980-151-0x0000000000400000-0x000000000047E000-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