remcos | 1c804518ea4c220b90493ad676e48a70265a7fc20af5fb8cf75c36b425f096c8

General

Target

tmp.exe
Size

1.2MB
MD5

196478f75582efb6b95a9b30a6b0afc1
SHA1

d0aee5668cd9d8aedca5aedf1350924fb47ca939
SHA256

1c804518ea4c220b90493ad676e48a70265a7fc20af5fb8cf75c36b425f096c8
SHA512

4fdfaadf14d2c81bcbb373db3c4864bf415e0765c32cd3b57640e5aa5da6a83986e4f031523641d361670dbf685dd518983eae401c4a7eae503fd7a1acd89631

Score

10^/10

remcos remotehost persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

skygroupt6.zapto.org:2080

Attributes

audio_folder
MicRecords
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
ios.exe
copy_folder
delete_file
false
hide_file
true
hide_keylog_file
true
install_flag
true
install_path
%AppData%
keylog_crypt
true
keylog_file
logs.dat
keylog_flag
false
keylog_folder
keylog_path
%AppData%
mouse_option
false
mutex
Remcos-FL7CBT
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Re
take_screenshot_option
false
take_screenshot_time
5
take_screenshot_title

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Executes dropped EXE 1 IoCs

Processes:

ios.exe

pid process

976 ios.exe
Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

656 cmd.exe

pid	process
976	ios.exe

pid	process
656	cmd.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

tmp.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows\CurrentVersion\Run\	tmp.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows\CurrentVersion\Run\Re = "\"C:\\Users\\Admin\\AppData\\Roaming\\ios.exe\""	tmp.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

tmp.exe

description pid process target process

PID 1092 set thread context of 1068 1092 tmp.exe tmp.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 4 IoCs

Processes:

tmp.exeios.exe

pid process

1092 tmp.exe
1092 tmp.exe
976 ios.exe
976 ios.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

tmp.exeios.exe

description pid process

Token: SeDebugPrivilege 1092 tmp.exe
Token: SeDebugPrivilege 976 ios.exe

description	pid	process	target process
PID 1092 set thread context of 1068	1092	tmp.exe	tmp.exe

pid	process
1092	tmp.exe
1092	tmp.exe
976	ios.exe
976	ios.exe

description	pid	process
Token: SeDebugPrivilege	1092	tmp.exe
Token: SeDebugPrivilege	976	ios.exe

Suspicious use of WriteProcessMemory 25 IoCs

Processes:

tmp.exetmp.exeWScript.execmd.exe

description	pid	process	target process
PID 1092 wrote to memory of 1068	1092	tmp.exe	tmp.exe
PID 1092 wrote to memory of 1068	1092	tmp.exe	tmp.exe
PID 1092 wrote to memory of 1068	1092	tmp.exe	tmp.exe
PID 1092 wrote to memory of 1068	1092	tmp.exe	tmp.exe
PID 1092 wrote to memory of 1068	1092	tmp.exe	tmp.exe
PID 1092 wrote to memory of 1068	1092	tmp.exe	tmp.exe
PID 1092 wrote to memory of 1068	1092	tmp.exe	tmp.exe
PID 1092 wrote to memory of 1068	1092	tmp.exe	tmp.exe
PID 1092 wrote to memory of 1068	1092	tmp.exe	tmp.exe
PID 1092 wrote to memory of 1068	1092	tmp.exe	tmp.exe
PID 1092 wrote to memory of 1068	1092	tmp.exe	tmp.exe
PID 1092 wrote to memory of 1068	1092	tmp.exe	tmp.exe
PID 1092 wrote to memory of 1068	1092	tmp.exe	tmp.exe
PID 1068 wrote to memory of 1684	1068	tmp.exe	WScript.exe
PID 1068 wrote to memory of 1684	1068	tmp.exe	WScript.exe
PID 1068 wrote to memory of 1684	1068	tmp.exe	WScript.exe
PID 1068 wrote to memory of 1684	1068	tmp.exe	WScript.exe
PID 1684 wrote to memory of 656	1684	WScript.exe	cmd.exe
PID 1684 wrote to memory of 656	1684	WScript.exe	cmd.exe
PID 1684 wrote to memory of 656	1684	WScript.exe	cmd.exe
PID 1684 wrote to memory of 656	1684	WScript.exe	cmd.exe
PID 656 wrote to memory of 976	656	cmd.exe	ios.exe
PID 656 wrote to memory of 976	656	cmd.exe	ios.exe
PID 656 wrote to memory of 976	656	cmd.exe	ios.exe
PID 656 wrote to memory of 976	656	cmd.exe	ios.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:1092

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
2⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1068

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
3⤵
- Suspicious use of WriteProcessMemory
PID:1684

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\ios.exe"
4⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:656

C:\Users\Admin\AppData\Roaming\ios.exe
C:\Users\Admin\AppData\Roaming\ios.exe
5⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:976

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

MD5
bba8d44c990bd0bb75d50716749cb6c0

SHA1
12ba25b7f6f7b6225fe5cd1ddcba07839a90cc00

SHA256
d90d18f6929159680ab3b424e1edf0e3a43f312f4291fc9f80fb78460d2e04f6

SHA512
994701552561b7bf48cdb36ee1430e13a193c6283e3a7c00e096938f5efad58bb35dcc7607634973a9d42485c69ca8eaa68a7ff9093513be0b7d6c3afd942de2

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

MD5
196478f75582efb6b95a9b30a6b0afc1

SHA1
d0aee5668cd9d8aedca5aedf1350924fb47ca939

SHA256
1c804518ea4c220b90493ad676e48a70265a7fc20af5fb8cf75c36b425f096c8

SHA512
4fdfaadf14d2c81bcbb373db3c4864bf415e0765c32cd3b57640e5aa5da6a83986e4f031523641d361670dbf685dd518983eae401c4a7eae503fd7a1acd89631

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

MD5
196478f75582efb6b95a9b30a6b0afc1

SHA1
d0aee5668cd9d8aedca5aedf1350924fb47ca939

SHA256
1c804518ea4c220b90493ad676e48a70265a7fc20af5fb8cf75c36b425f096c8

SHA512
4fdfaadf14d2c81bcbb373db3c4864bf415e0765c32cd3b57640e5aa5da6a83986e4f031523641d361670dbf685dd518983eae401c4a7eae503fd7a1acd89631

Download Submit
\Users\Admin\AppData\Roaming\ios.exe
Filesize
1.2MB

MD5
196478f75582efb6b95a9b30a6b0afc1

SHA1
d0aee5668cd9d8aedca5aedf1350924fb47ca939

SHA256
1c804518ea4c220b90493ad676e48a70265a7fc20af5fb8cf75c36b425f096c8

SHA512
4fdfaadf14d2c81bcbb373db3c4864bf415e0765c32cd3b57640e5aa5da6a83986e4f031523641d361670dbf685dd518983eae401c4a7eae503fd7a1acd89631

Download Submit
memory/656-80-0x0000000000000000-mapping.dmp

Download
memory/976-85-0x0000000000340000-0x000000000047A000-memory.dmp

Filesize
1.2MB

Download
memory/976-83-0x0000000000000000-mapping.dmp

Download
memory/1068-60-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/1068-77-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/1068-65-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/1068-66-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/1068-67-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/1068-69-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/1068-71-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/1068-72-0x0000000000431302-mapping.dmp

Download
memory/1068-75-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/1068-64-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/1068-59-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/1068-62-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/1092-54-0x0000000000EC0000-0x0000000000FFA000-memory.dmp

Filesize
1.2MB

Download
memory/1092-58-0x0000000005950000-0x00000000059CA000-memory.dmp

Filesize
488KB

Download
memory/1092-57-0x0000000008520000-0x00000000085E8000-memory.dmp

Filesize
800KB

Download
memory/1092-56-0x0000000000950000-0x0000000000968000-memory.dmp

Filesize
96KB

Download
memory/1092-55-0x0000000076571000-0x0000000076573000-memory.dmp

Filesize
8KB

Download
memory/1684-76-0x0000000000000000-mapping.dmp

Download

Analysis

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