remcos | cd53007fc79e7078155fef915142ca15d695c3a1ba6494d3027365cf24157f5a

General

Target

tmp.exe
Size

1011KB
MD5

0e167d008251242527393eeebbad5542
SHA1

0520dd52fb34374ddcbd738ac327a4737b226a62
SHA256

cd53007fc79e7078155fef915142ca15d695c3a1ba6494d3027365cf24157f5a
SHA512

42f5366a42b7bdf0dd88363903048a93e124772176f292393296e3d498835972154ff656d60035633668ea2fe225dec7f381b08d4533206316f4ee634f3e14bf
SSDEEP

24576:jzl6Tw725gBZ6oaoyI7MTgGxQLJluWccesdF:jM07yo6pEoTgyWnuCesdF

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-1-5-21-1529757233-3489015626-3409890339-1000\Control Panel\International\Geo\Nation	tmp.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 2 IoCs

Processes:

oos.exeoos.exe

pid process

3840 oos.exe
1708 oos.exe

pid	process
3840	oos.exe
1708	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-1-5-21-1529757233-3489015626-3409890339-1000\Software\Microsoft\Windows\CurrentVersion\Run\	oos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\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-1-5-21-1529757233-3489015626-3409890339-1000\Software\Microsoft\Windows\CurrentVersion\Run\	tmp.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\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 4016 set thread context of 4172 4016 tmp.exe tmp.exe
PID 3840 set thread context of 1708 3840 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-1-5-21-1529757233-3489015626-3409890339-1000_Classes\Local Settings tmp.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

tmp.exe

pid process

4016 tmp.exe
4016 tmp.exe
4016 tmp.exe
4016 tmp.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

tmp.exe

description pid process

Token: SeDebugPrivilege 4016 tmp.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

oos.exe

pid process

1708 oos.exe

description	pid	process	target process
PID 4016 set thread context of 4172	4016	tmp.exe	tmp.exe
PID 3840 set thread context of 1708	3840	oos.exe	oos.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000_Classes\Local Settings	tmp.exe

pid	process
4016	tmp.exe
4016	tmp.exe
4016	tmp.exe
4016	tmp.exe

description	pid	process
Token: SeDebugPrivilege	4016	tmp.exe

pid	process
1708	oos.exe

Suspicious use of WriteProcessMemory 39 IoCs

Processes:

tmp.exetmp.exeWScript.execmd.exeoos.exe

description	pid	process	target process
PID 4016 wrote to memory of 1560	4016	tmp.exe	tmp.exe
PID 4016 wrote to memory of 1560	4016	tmp.exe	tmp.exe
PID 4016 wrote to memory of 1560	4016	tmp.exe	tmp.exe
PID 4016 wrote to memory of 3448	4016	tmp.exe	tmp.exe
PID 4016 wrote to memory of 3448	4016	tmp.exe	tmp.exe
PID 4016 wrote to memory of 3448	4016	tmp.exe	tmp.exe
PID 4016 wrote to memory of 4172	4016	tmp.exe	tmp.exe
PID 4016 wrote to memory of 4172	4016	tmp.exe	tmp.exe
PID 4016 wrote to memory of 4172	4016	tmp.exe	tmp.exe
PID 4016 wrote to memory of 4172	4016	tmp.exe	tmp.exe
PID 4016 wrote to memory of 4172	4016	tmp.exe	tmp.exe
PID 4016 wrote to memory of 4172	4016	tmp.exe	tmp.exe
PID 4016 wrote to memory of 4172	4016	tmp.exe	tmp.exe
PID 4016 wrote to memory of 4172	4016	tmp.exe	tmp.exe
PID 4016 wrote to memory of 4172	4016	tmp.exe	tmp.exe
PID 4016 wrote to memory of 4172	4016	tmp.exe	tmp.exe
PID 4016 wrote to memory of 4172	4016	tmp.exe	tmp.exe
PID 4016 wrote to memory of 4172	4016	tmp.exe	tmp.exe
PID 4172 wrote to memory of 2184	4172	tmp.exe	WScript.exe
PID 4172 wrote to memory of 2184	4172	tmp.exe	WScript.exe
PID 4172 wrote to memory of 2184	4172	tmp.exe	WScript.exe
PID 2184 wrote to memory of 4020	2184	WScript.exe	cmd.exe
PID 2184 wrote to memory of 4020	2184	WScript.exe	cmd.exe
PID 2184 wrote to memory of 4020	2184	WScript.exe	cmd.exe
PID 4020 wrote to memory of 3840	4020	cmd.exe	oos.exe
PID 4020 wrote to memory of 3840	4020	cmd.exe	oos.exe
PID 4020 wrote to memory of 3840	4020	cmd.exe	oos.exe
PID 3840 wrote to memory of 1708	3840	oos.exe	oos.exe
PID 3840 wrote to memory of 1708	3840	oos.exe	oos.exe
PID 3840 wrote to memory of 1708	3840	oos.exe	oos.exe
PID 3840 wrote to memory of 1708	3840	oos.exe	oos.exe
PID 3840 wrote to memory of 1708	3840	oos.exe	oos.exe
PID 3840 wrote to memory of 1708	3840	oos.exe	oos.exe
PID 3840 wrote to memory of 1708	3840	oos.exe	oos.exe
PID 3840 wrote to memory of 1708	3840	oos.exe	oos.exe
PID 3840 wrote to memory of 1708	3840	oos.exe	oos.exe
PID 3840 wrote to memory of 1708	3840	oos.exe	oos.exe
PID 3840 wrote to memory of 1708	3840	oos.exe	oos.exe
PID 3840 wrote to memory of 1708	3840	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:4016

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
2⤵
PID:1560

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
2⤵
PID:3448

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:4172

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:2184

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\oos.exe"
4⤵
- Suspicious use of WriteProcessMemory
PID:4020

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 WriteProcessMemory
PID:3840

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:1708

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
64af6508cf9f6ac136a631b584378409

SHA1
56c52eb0cc8e02975a81e323e70ea6b4b6ebc922

SHA256
d12bb0d20061a01d051163b3f4f58a159c7e5c0ef44bbd10bf59386c9197397e

SHA512
1546cf9e81a0cacd76fbeaa4f2e014c5c578c7350075554e4138a3c915b20424478db73b5f55370f99aa2515377c3f8cd98ec0190d405d31a2ad9278c782d9d2

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
1011KB

MD5
0e167d008251242527393eeebbad5542

SHA1
0520dd52fb34374ddcbd738ac327a4737b226a62

SHA256
cd53007fc79e7078155fef915142ca15d695c3a1ba6494d3027365cf24157f5a

SHA512
42f5366a42b7bdf0dd88363903048a93e124772176f292393296e3d498835972154ff656d60035633668ea2fe225dec7f381b08d4533206316f4ee634f3e14bf

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
1011KB

MD5
0e167d008251242527393eeebbad5542

SHA1
0520dd52fb34374ddcbd738ac327a4737b226a62

SHA256
cd53007fc79e7078155fef915142ca15d695c3a1ba6494d3027365cf24157f5a

SHA512
42f5366a42b7bdf0dd88363903048a93e124772176f292393296e3d498835972154ff656d60035633668ea2fe225dec7f381b08d4533206316f4ee634f3e14bf

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
1011KB

MD5
0e167d008251242527393eeebbad5542

SHA1
0520dd52fb34374ddcbd738ac327a4737b226a62

SHA256
cd53007fc79e7078155fef915142ca15d695c3a1ba6494d3027365cf24157f5a

SHA512
42f5366a42b7bdf0dd88363903048a93e124772176f292393296e3d498835972154ff656d60035633668ea2fe225dec7f381b08d4533206316f4ee634f3e14bf

Download Submit
memory/1708-178-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1708-166-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1708-171-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1708-170-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1708-169-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1708-168-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1708-167-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1708-176-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1708-162-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1708-179-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1708-186-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1708-165-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1708-163-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1708-187-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1708-160-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/3840-156-0x0000000005090000-0x00000000050A0000-memory.dmp

Filesize
64KB

Download
memory/3840-157-0x0000000005090000-0x00000000050A0000-memory.dmp

Filesize
64KB

Download
memory/4016-138-0x0000000007960000-0x0000000007B06000-memory.dmp

Filesize
1.6MB

Download
memory/4016-133-0x0000000000280000-0x0000000000382000-memory.dmp

Filesize
1.0MB

Download
memory/4016-134-0x00000000051F0000-0x0000000005794000-memory.dmp

Filesize
5.6MB

Download
memory/4016-135-0x0000000004D40000-0x0000000004DD2000-memory.dmp

Filesize
584KB

Download
memory/4016-136-0x0000000004DE0000-0x0000000004DEA000-memory.dmp

Filesize
40KB

Download
memory/4016-137-0x0000000004E80000-0x0000000004E90000-memory.dmp

Filesize
64KB

Download
memory/4016-140-0x0000000007810000-0x00000000078AC000-memory.dmp

Filesize
624KB

Download
memory/4016-139-0x0000000004E80000-0x0000000004E90000-memory.dmp

Filesize
64KB

Download
memory/4172-150-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4172-141-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4172-143-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4172-144-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/4172-151-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads