remcos | afa179e0ec215f3c6d914719310cba0351c5a016c9c51453eea0fe4fe1c87de4

General

Target

b9b4c8a0b58f24eae6f327eb323aecc1.exe
Size

1.4MB
MD5

b9b4c8a0b58f24eae6f327eb323aecc1
SHA1

0d15ed0818508c8b8c502cd283a0833d763a0f79
SHA256

afa179e0ec215f3c6d914719310cba0351c5a016c9c51453eea0fe4fe1c87de4
SHA512

4c8d2dc7105725882646377b3a1ceba4b938d546a5dda7350b546f27a3873f77d769d5d8fcb0e344de6b3d1227e4f086df28990d54abe18aaf380f190c58b31c
SSDEEP

24576:W6yJMY9UFoRDhkeYM1jJR97zUbia9JVe0hs5WfBiERJchVML1bT6ES:BY9UORVOM1jJHzaiape0hsABFRJch6Lm

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
behavioral2/memory/2556-12-0x0000000005E60000-0x0000000005E8C000-memory.dmp	rezer0

Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.

Query Registry
T1012

System Information Discovery
T1082

Processes:

test.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\Control Panel\International\Geo\Nation test.exe
Executes dropped EXE 1 IoCs

Processes:

test.exe

pid process

2556 test.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\Control Panel\International\Geo\Nation	test.exe

pid	process
2556	test.exe

UPX packed file 3 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4968-0-0x0000000000400000-0x00000000006F1000-memory.dmp	upx
behavioral2/memory/4968-14-0x0000000000400000-0x00000000006F1000-memory.dmp	upx
behavioral2/memory/4968-26-0x0000000000400000-0x00000000006F1000-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 2556 set thread context of 3648 2556 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

4632 schtasks.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

test.exe

pid process

2556 test.exe
2556 test.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

test.exe

description pid process

Token: SeDebugPrivilege 2556 test.exe

description	pid	process	target process
PID 2556 set thread context of 3648	2556	test.exe	vbc.exe

pid	process
4632	schtasks.exe

pid	process
2556	test.exe
2556	test.exe

description	pid	process
Token: SeDebugPrivilege	2556	test.exe

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

b9b4c8a0b58f24eae6f327eb323aecc1.execmd.exetest.exe

description	pid	process	target process
PID 4968 wrote to memory of 2768	4968	b9b4c8a0b58f24eae6f327eb323aecc1.exe	cmd.exe
PID 4968 wrote to memory of 2768	4968	b9b4c8a0b58f24eae6f327eb323aecc1.exe	cmd.exe
PID 4968 wrote to memory of 2768	4968	b9b4c8a0b58f24eae6f327eb323aecc1.exe	cmd.exe
PID 2768 wrote to memory of 2556	2768	cmd.exe	test.exe
PID 2768 wrote to memory of 2556	2768	cmd.exe	test.exe
PID 2768 wrote to memory of 2556	2768	cmd.exe	test.exe
PID 2556 wrote to memory of 4632	2556	test.exe	schtasks.exe
PID 2556 wrote to memory of 4632	2556	test.exe	schtasks.exe
PID 2556 wrote to memory of 4632	2556	test.exe	schtasks.exe
PID 2556 wrote to memory of 3648	2556	test.exe	vbc.exe
PID 2556 wrote to memory of 3648	2556	test.exe	vbc.exe
PID 2556 wrote to memory of 3648	2556	test.exe	vbc.exe
PID 2556 wrote to memory of 3648	2556	test.exe	vbc.exe
PID 2556 wrote to memory of 3648	2556	test.exe	vbc.exe
PID 2556 wrote to memory of 3648	2556	test.exe	vbc.exe
PID 2556 wrote to memory of 3648	2556	test.exe	vbc.exe
PID 2556 wrote to memory of 3648	2556	test.exe	vbc.exe
PID 2556 wrote to memory of 3648	2556	test.exe	vbc.exe
PID 2556 wrote to memory of 3648	2556	test.exe	vbc.exe

C:\Users\Admin\AppData\Local\Temp\b9b4c8a0b58f24eae6f327eb323aecc1.exe
"C:\Users\Admin\AppData\Local\Temp\b9b4c8a0b58f24eae6f327eb323aecc1.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4968

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c test.exe
2⤵
- Suspicious use of WriteProcessMemory
PID:2768

C:\Users\Admin\AppData\Local\Temp\test.exe
test.exe
3⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2556

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\vXAlJeWc" /XML "C:\Users\Admin\AppData\Local\Temp\tmp9877.tmp"
4⤵
- Creates scheduled task(s)
PID:4632

C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
"{path}"
4⤵
PID:3648

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

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\test.exe
Filesize
330KB

MD5
261aa73f93c90dcec0c36a51cb9b5dee

SHA1
b0c41e06cd2ded81706820423db40bf8fea2c957

SHA256
ae160b749914bd56aecbcf43d56a59bde2069a145682b2911fe50c6adabe1b54

SHA512
7b90335b4a7db7b5056f6d60db642754038dc544bd2c1f82e68b1f8e339bf70227f0c08d157b4ca1004448fab7d109f0239196f242d0edeab978de9025a3c0ed

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp9877.tmp
Filesize
1KB

MD5
23c88c68c088ccfbad0f3e19698125f2

SHA1
26a7a9bf03694cbe2e945d0b59952d9df3108a66

SHA256
672081973cd0feffe42bdfdc8b32d89d8b6d5af108726e21ba08bb7949da2aba

SHA512
76009888b6f25ac71d1f95984db5bd308df4dc74a4e7384c14eaee138979f43fd3790f6c375315b6e0142fe3111ed53a9e4c378a021f8f0aca0ffd826c337c74

Download Submit
memory/2556-9-0x0000000005B70000-0x0000000005B80000-memory.dmp

Filesize
64KB

Download
memory/2556-6-0x0000000075330000-0x0000000075AE0000-memory.dmp

Filesize
7.7MB

Download
memory/2556-5-0x0000000000E80000-0x0000000000ED8000-memory.dmp

Filesize
352KB

Download
memory/2556-8-0x0000000005900000-0x0000000005992000-memory.dmp

Filesize
584KB

Download
memory/2556-12-0x0000000005E60000-0x0000000005E8C000-memory.dmp

Filesize
176KB

Download
memory/2556-10-0x00000000058D0000-0x00000000058DA000-memory.dmp

Filesize
40KB

Download
memory/2556-11-0x00000000058C0000-0x00000000058C8000-memory.dmp

Filesize
32KB

Download
memory/2556-25-0x0000000075330000-0x0000000075AE0000-memory.dmp

Filesize
7.7MB

Download
memory/2556-13-0x0000000006500000-0x000000000659C000-memory.dmp

Filesize
624KB

Download
memory/2556-7-0x0000000005EB0000-0x0000000006454000-memory.dmp

Filesize
5.6MB

Download
memory/3648-31-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3648-28-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3648-44-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3648-42-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3648-24-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3648-40-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3648-27-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3648-20-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3648-29-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3648-23-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3648-32-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3648-36-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4968-26-0x0000000000400000-0x00000000006F1000-memory.dmp

Filesize
2.9MB

Download
memory/4968-0-0x0000000000400000-0x00000000006F1000-memory.dmp

Filesize
2.9MB

Download
memory/4968-14-0x0000000000400000-0x00000000006F1000-memory.dmp

Filesize
2.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

Loading Replay Monitor...

Downloads