remcos | 55db5cb39270bc8eb34b2290eb245f51f93d0137d054d4e3644aaa73fe8bd71c

General

Target

b7c70536fe56665a8045252c54bbf96f.exe
Size

1.3MB
MD5

b7c70536fe56665a8045252c54bbf96f
SHA1

afe80b21d9c345f6172bdb22368981abeffb005e
SHA256

55db5cb39270bc8eb34b2290eb245f51f93d0137d054d4e3644aaa73fe8bd71c
SHA512

7cd30e1e0727b7ea06e2b6131988f496cd3fad92d6ddcdd12a9ba7a52740414410891b345ef51c1481612ea42ea91b7f3905c9c752be29b0cabda6e7d62d610f
SSDEEP

24576:qJDc5xH/C09yPTn1QpH1W6UdWW0odEJ6z/UUYk2QbCEOJSQQ5G2:qyHHK09yPTnGpH1EdWWndw6z/ok2QbnL

Score

10^/10

remcos graced rat rezer0 upx

Malware Config

Extracted

Family

remcos

Version

2.5.0 Pro

Botnet

GRACED

C2

thankyoulord.ddns.net:5050

Attributes

audio_folder
MicRecords
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
Remcos-0S5XD9
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
remcos
take_screenshot_option
false
take_screenshot_time
5
take_screenshot_title
wikipedia;solitaire;

Signatures

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

ReZer0 packer 1 IoCs

Detects ReZer0, a packer with multiple versions used in various campaigns.

rezer0

Processes:

resource	yara_rule
behavioral1/memory/2780-9-0x0000000004200000-0x000000000422C000-memory.dmp	rezer0

Executes dropped EXE 1 IoCs

Processes:

test.exe

pid process

2780 test.exe
Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

2252 cmd.exe

pid	process
2780	test.exe

pid	process
2252	cmd.exe

UPX packed file 3 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral1/memory/832-1-0x0000000000400000-0x00000000006F0000-memory.dmp	upx
behavioral1/memory/832-10-0x0000000000400000-0x00000000006F0000-memory.dmp	upx
behavioral1/memory/832-35-0x0000000000400000-0x00000000006F0000-memory.dmp	upx

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064
Suspicious use of SetThreadContext 1 IoCs

Processes:

test.exe

description pid process target process

PID 2780 set thread context of 2720 2780 test.exe vbc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exe

pid process

2636 schtasks.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

test.exe

pid process

2780 test.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

test.exe

description pid process

Token: SeDebugPrivilege 2780 test.exe

description	pid	process	target process
PID 2780 set thread context of 2720	2780	test.exe	vbc.exe

pid	process
2636	schtasks.exe

pid	process
2780	test.exe

description	pid	process
Token: SeDebugPrivilege	2780	test.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

b7c70536fe56665a8045252c54bbf96f.execmd.exetest.exe

description	pid	process	target process
PID 832 wrote to memory of 2252	832	b7c70536fe56665a8045252c54bbf96f.exe	cmd.exe
PID 832 wrote to memory of 2252	832	b7c70536fe56665a8045252c54bbf96f.exe	cmd.exe
PID 832 wrote to memory of 2252	832	b7c70536fe56665a8045252c54bbf96f.exe	cmd.exe
PID 832 wrote to memory of 2252	832	b7c70536fe56665a8045252c54bbf96f.exe	cmd.exe
PID 2252 wrote to memory of 2780	2252	cmd.exe	test.exe
PID 2252 wrote to memory of 2780	2252	cmd.exe	test.exe
PID 2252 wrote to memory of 2780	2252	cmd.exe	test.exe
PID 2252 wrote to memory of 2780	2252	cmd.exe	test.exe
PID 2780 wrote to memory of 2636	2780	test.exe	schtasks.exe
PID 2780 wrote to memory of 2636	2780	test.exe	schtasks.exe
PID 2780 wrote to memory of 2636	2780	test.exe	schtasks.exe
PID 2780 wrote to memory of 2636	2780	test.exe	schtasks.exe
PID 2780 wrote to memory of 2720	2780	test.exe	vbc.exe
PID 2780 wrote to memory of 2720	2780	test.exe	vbc.exe
PID 2780 wrote to memory of 2720	2780	test.exe	vbc.exe
PID 2780 wrote to memory of 2720	2780	test.exe	vbc.exe
PID 2780 wrote to memory of 2720	2780	test.exe	vbc.exe
PID 2780 wrote to memory of 2720	2780	test.exe	vbc.exe
PID 2780 wrote to memory of 2720	2780	test.exe	vbc.exe
PID 2780 wrote to memory of 2720	2780	test.exe	vbc.exe
PID 2780 wrote to memory of 2720	2780	test.exe	vbc.exe
PID 2780 wrote to memory of 2720	2780	test.exe	vbc.exe
PID 2780 wrote to memory of 2720	2780	test.exe	vbc.exe

C:\Users\Admin\AppData\Local\Temp\b7c70536fe56665a8045252c54bbf96f.exe
"C:\Users\Admin\AppData\Local\Temp\b7c70536fe56665a8045252c54bbf96f.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:832

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c test.exe
2⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2252

C:\Users\Admin\AppData\Local\Temp\test.exe
test.exe
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2780

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\vXAlJeWc" /XML "C:\Users\Admin\AppData\Local\Temp\tmp4837.tmp"
4⤵
- Creates scheduled task(s)
PID:2636

C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
"{path}"
4⤵
PID:2720

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scripting

1

T1064

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Scripting

1

T1064

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmp4837.tmp
Filesize
1KB

MD5
e898ba7ebcc596ba3a1a36b7cb407a7e

SHA1
69fc64a512fae6be641b77ead7e06bd1f3e8a80e

SHA256
a06ac6fa71b5ae7a4a163f4f8c246b42490fa11fdd76e483a3dce7e2bf908ac9

SHA512
7c26d6c25c59410940be7f265d123c54575a9c03718d97f3ed599d115c150ae65dd1705c461409c2084ce467123f7b914e03b15043c31ff1bc3229c92dfe304d

Download Submit
\Users\Admin\AppData\Local\Temp\test.exe
Filesize
330KB

MD5
261aa73f93c90dcec0c36a51cb9b5dee

SHA1
b0c41e06cd2ded81706820423db40bf8fea2c957

SHA256
ae160b749914bd56aecbcf43d56a59bde2069a145682b2911fe50c6adabe1b54

SHA512
7b90335b4a7db7b5056f6d60db642754038dc544bd2c1f82e68b1f8e339bf70227f0c08d157b4ca1004448fab7d109f0239196f242d0edeab978de9025a3c0ed

Download Submit
memory/832-10-0x0000000000400000-0x00000000006F0000-memory.dmp

Filesize
2.9MB

Download
memory/832-1-0x0000000000400000-0x00000000006F0000-memory.dmp

Filesize
2.9MB

Download
memory/832-35-0x0000000000400000-0x00000000006F0000-memory.dmp

Filesize
2.9MB

Download
memory/2720-43-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2720-55-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2720-59-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2720-57-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2720-26-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2720-24-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2720-22-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2720-28-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/2720-29-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2720-20-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2720-18-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2720-16-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2720-31-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2720-49-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2720-33-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2720-53-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2720-34-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2720-36-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2720-37-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2720-38-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2720-40-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2720-41-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2720-51-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2720-45-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2720-47-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2780-6-0x0000000073F90000-0x000000007467E000-memory.dmp

Filesize
6.9MB

Download
memory/2780-5-0x0000000000320000-0x0000000000378000-memory.dmp

Filesize
352KB

Download
memory/2780-9-0x0000000004200000-0x000000000422C000-memory.dmp

Filesize
176KB

Download
memory/2780-32-0x0000000073F90000-0x000000007467E000-memory.dmp

Filesize
6.9MB

Download
memory/2780-7-0x0000000004A60000-0x0000000004AA0000-memory.dmp

Filesize
256KB

Download
memory/2780-8-0x00000000003F0000-0x00000000003F8000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

Loading Replay Monitor...

Downloads