remcos | ec189bab39fc97ddc3282ccca5e6d4bc623b0bc82d263efb95445676d67d9b71

General

Target

9c1f32395776c5598e1b6ea9d971ddf2.exe
Size

1.4MB
MD5

9c1f32395776c5598e1b6ea9d971ddf2
SHA1

c2609853716705901b3ee63e87a67c519c7f1d13
SHA256

ec189bab39fc97ddc3282ccca5e6d4bc623b0bc82d263efb95445676d67d9b71
SHA512

394d7faf19eab2904b96c3547cd091e05ae493930a6135fd66569f6023866b3d76f17e65f9cbe720044d127b626710c788344c8176e2d4d817ef3563b156e528
SSDEEP

24576:y6yJMY9UFoRDhkeYM1jJR97zUbia9JVe0hs5WfBiERJchVML1bT6ES:1Y9UORVOM1jJHzaiape0hsABFRJch6Lm

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/3768-12-0x0000000005C80000-0x0000000005CAC000-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-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation test.exe
Executes dropped EXE 1 IoCs

Processes:

test.exe

pid process

3768 test.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation	test.exe

pid	process
3768	test.exe

UPX packed file 3 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/1996-0-0x0000000000400000-0x00000000006F1000-memory.dmp	upx
behavioral2/memory/1996-14-0x0000000000400000-0x00000000006F1000-memory.dmp	upx
behavioral2/memory/1996-26-0x0000000000400000-0x00000000006F1000-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 3768 set thread context of 4108 3768 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

3884 schtasks.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

test.exe

pid process

3768 test.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

test.exe

description pid process

Token: SeDebugPrivilege 3768 test.exe

description	pid	process	target process
PID 3768 set thread context of 4108	3768	test.exe	vbc.exe

pid	process
3884	schtasks.exe

pid	process
3768	test.exe

description	pid	process
Token: SeDebugPrivilege	3768	test.exe

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

9c1f32395776c5598e1b6ea9d971ddf2.execmd.exetest.exe

description	pid	process	target process
PID 1996 wrote to memory of 872	1996	9c1f32395776c5598e1b6ea9d971ddf2.exe	cmd.exe
PID 1996 wrote to memory of 872	1996	9c1f32395776c5598e1b6ea9d971ddf2.exe	cmd.exe
PID 1996 wrote to memory of 872	1996	9c1f32395776c5598e1b6ea9d971ddf2.exe	cmd.exe
PID 872 wrote to memory of 3768	872	cmd.exe	test.exe
PID 872 wrote to memory of 3768	872	cmd.exe	test.exe
PID 872 wrote to memory of 3768	872	cmd.exe	test.exe
PID 3768 wrote to memory of 3884	3768	test.exe	schtasks.exe
PID 3768 wrote to memory of 3884	3768	test.exe	schtasks.exe
PID 3768 wrote to memory of 3884	3768	test.exe	schtasks.exe
PID 3768 wrote to memory of 4108	3768	test.exe	vbc.exe
PID 3768 wrote to memory of 4108	3768	test.exe	vbc.exe
PID 3768 wrote to memory of 4108	3768	test.exe	vbc.exe
PID 3768 wrote to memory of 4108	3768	test.exe	vbc.exe
PID 3768 wrote to memory of 4108	3768	test.exe	vbc.exe
PID 3768 wrote to memory of 4108	3768	test.exe	vbc.exe
PID 3768 wrote to memory of 4108	3768	test.exe	vbc.exe
PID 3768 wrote to memory of 4108	3768	test.exe	vbc.exe
PID 3768 wrote to memory of 4108	3768	test.exe	vbc.exe
PID 3768 wrote to memory of 4108	3768	test.exe	vbc.exe

C:\Users\Admin\AppData\Local\Temp\9c1f32395776c5598e1b6ea9d971ddf2.exe
"C:\Users\Admin\AppData\Local\Temp\9c1f32395776c5598e1b6ea9d971ddf2.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1996

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c test.exe
2⤵
- Suspicious use of WriteProcessMemory
PID:872

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:3768

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\vXAlJeWc" /XML "C:\Users\Admin\AppData\Local\Temp\tmp85BA.tmp"
4⤵
- Creates scheduled task(s)
PID:3884

C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
"{path}"
4⤵
PID:4108

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

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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\tmp85BA.tmp
Filesize
1KB

MD5
2312fee8efad283cbb21c632a6b6ca9d

SHA1
ba82deaee09f5047757f541f88b9df5bbcd0e6dd

SHA256
373b29b4c2d651f5a9d6842862b00bb9fef31756f758b5e8f7f90bb69faf1ee9

SHA512
e3f0e559a0bf258b88b3e80003831ed7abba7d58f06cea287ee428b3d898a7469592ebf4897f5861a452e60734bfdedd66e144ee2482d94f02cf8531c046a4c2

Download Submit
memory/1996-26-0x0000000000400000-0x00000000006F1000-memory.dmp

Filesize
2.9MB

Download
memory/1996-14-0x0000000000400000-0x00000000006F1000-memory.dmp

Filesize
2.9MB

Download
memory/1996-0-0x0000000000400000-0x00000000006F1000-memory.dmp

Filesize
2.9MB

Download
memory/3768-11-0x0000000005760000-0x0000000005768000-memory.dmp

Filesize
32KB

Download
memory/3768-24-0x0000000074F30000-0x00000000756E0000-memory.dmp

Filesize
7.7MB

Download
memory/3768-10-0x0000000005770000-0x000000000577A000-memory.dmp

Filesize
40KB

Download
memory/3768-6-0x0000000074F30000-0x00000000756E0000-memory.dmp

Filesize
7.7MB

Download
memory/3768-12-0x0000000005C80000-0x0000000005CAC000-memory.dmp

Filesize
176KB

Download
memory/3768-13-0x0000000006340000-0x00000000063DC000-memory.dmp

Filesize
624KB

Download
memory/3768-8-0x00000000056B0000-0x0000000005742000-memory.dmp

Filesize
584KB

Download
memory/3768-5-0x0000000000DC0000-0x0000000000E18000-memory.dmp

Filesize
352KB

Download
memory/3768-7-0x0000000005D90000-0x0000000006334000-memory.dmp

Filesize
5.6MB

Download
memory/3768-9-0x00000000058F0000-0x0000000005900000-memory.dmp

Filesize
64KB

Download
memory/4108-23-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4108-25-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4108-27-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4108-37-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4108-28-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4108-29-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4108-30-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4108-33-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4108-20-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4108-41-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4108-51-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads