remcos | b26eb6fc92a2fc26739a203efd160fadbfb52c74d67eae4938e8d3d821e280c6

General

Target

DOCS.exe
Size

2.4MB
MD5

072ae884ff0b7f872b2d096c6f56cd8f
SHA1

ed6fe1c2cf2ade73266d7110bcc24d9b26651aa0
SHA256

060c14947ec75ce9817f7be911534e3e15a797dc17680acc2f05d8afbffdc1c1
SHA512

d8949a16c6b2b305345d73652ccdbe125eb4eb0a14a2811b0618f91717436fd61bfa5475846c7e4af93dc638c309bfea3c5ef6ecbcfe08aeaef5d98da16133b5
SSDEEP

24576:F3HAfWxfLwk0u2QynLyw//0gLTi+hxAL0CD2iFGo1V8nJp5bN+Zr3GiK3CvbRNOU:VjwR0nLkiRYr+Zr2iK3CvbRNO/j

Score

10^/10

remcos remotehost persistence rat

Malware Config

Extracted

Family

remcos

Version

2.7.1 Pro

Botnet

RemoteHost

C2

march4great.ddns.net:2409

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-PV9ZM8
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
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:

DOCS.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Control Panel\International\Geo\Nation DOCS.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Control Panel\International\Geo\Nation	DOCS.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

DOCS.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Holzupo = "\"C:\\Users\\Admin\\AppData\\Roaming\\Jipaxzr\\Holzupo.exe\""	DOCS.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

DOCS.exe

description pid process target process

PID 4748 set thread context of 2452 4748 DOCS.exe DOCS.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:

powershell.exeDOCS.exe

pid process

4632 powershell.exe
4632 powershell.exe
4748 DOCS.exe
4748 DOCS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exeDOCS.exe

description pid process

Token: SeDebugPrivilege 4632 powershell.exe
Token: SeDebugPrivilege 4748 DOCS.exe

description	pid	process	target process
PID 4748 set thread context of 2452	4748	DOCS.exe	DOCS.exe

pid	process
4632	powershell.exe
4632	powershell.exe
4748	DOCS.exe
4748	DOCS.exe

description	pid	process
Token: SeDebugPrivilege	4632	powershell.exe
Token: SeDebugPrivilege	4748	DOCS.exe

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

DOCS.exe

description	pid	process	target process
PID 4748 wrote to memory of 4632	4748	DOCS.exe	powershell.exe
PID 4748 wrote to memory of 4632	4748	DOCS.exe	powershell.exe
PID 4748 wrote to memory of 4632	4748	DOCS.exe	powershell.exe
PID 4748 wrote to memory of 2052	4748	DOCS.exe	DOCS.exe
PID 4748 wrote to memory of 2052	4748	DOCS.exe	DOCS.exe
PID 4748 wrote to memory of 2052	4748	DOCS.exe	DOCS.exe
PID 4748 wrote to memory of 2452	4748	DOCS.exe	DOCS.exe
PID 4748 wrote to memory of 2452	4748	DOCS.exe	DOCS.exe
PID 4748 wrote to memory of 2452	4748	DOCS.exe	DOCS.exe
PID 4748 wrote to memory of 2452	4748	DOCS.exe	DOCS.exe
PID 4748 wrote to memory of 2452	4748	DOCS.exe	DOCS.exe
PID 4748 wrote to memory of 2452	4748	DOCS.exe	DOCS.exe
PID 4748 wrote to memory of 2452	4748	DOCS.exe	DOCS.exe
PID 4748 wrote to memory of 2452	4748	DOCS.exe	DOCS.exe
PID 4748 wrote to memory of 2452	4748	DOCS.exe	DOCS.exe
PID 4748 wrote to memory of 2452	4748	DOCS.exe	DOCS.exe

C:\Users\Admin\AppData\Local\Temp\DOCS.exe
"C:\Users\Admin\AppData\Local\Temp\DOCS.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4748

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4632

C:\Users\Admin\AppData\Local\Temp\DOCS.exe
C:\Users\Admin\AppData\Local\Temp\DOCS.exe
2⤵
PID:2052

C:\Users\Admin\AppData\Local\Temp\DOCS.exe
C:\Users\Admin\AppData\Local\Temp\DOCS.exe
2⤵
PID:2452

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:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_kiv2chpg.jai.psm1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2452-163-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2452-169-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2452-168-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2452-167-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2452-166-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4632-151-0x0000000006210000-0x000000000622E000-memory.dmp

Filesize
120KB

Download
memory/4632-156-0x0000000004C30000-0x0000000004C40000-memory.dmp

Filesize
64KB

Download
memory/4632-145-0x0000000004C30000-0x0000000004C40000-memory.dmp

Filesize
64KB

Download
memory/4632-146-0x0000000004C30000-0x0000000004C40000-memory.dmp

Filesize
64KB

Download
memory/4632-136-0x0000000004B70000-0x0000000004BA6000-memory.dmp

Filesize
216KB

Download
memory/4632-152-0x0000000004C30000-0x0000000004C40000-memory.dmp

Filesize
64KB

Download
memory/4632-153-0x0000000007A60000-0x00000000080DA000-memory.dmp

Filesize
6.5MB

Download
memory/4632-154-0x00000000066B0000-0x00000000066CA000-memory.dmp

Filesize
104KB

Download
memory/4632-137-0x0000000005270000-0x0000000005898000-memory.dmp

Filesize
6.2MB

Download
memory/4632-144-0x0000000005AE0000-0x0000000005B46000-memory.dmp

Filesize
408KB

Download
memory/4632-157-0x0000000004C30000-0x0000000004C40000-memory.dmp

Filesize
64KB

Download
memory/4632-158-0x0000000004C30000-0x0000000004C40000-memory.dmp

Filesize
64KB

Download
memory/4632-138-0x0000000005A00000-0x0000000005A66000-memory.dmp

Filesize
408KB

Download
memory/4748-155-0x0000000004EB0000-0x0000000004EC0000-memory.dmp

Filesize
64KB

Download
memory/4748-133-0x0000000000300000-0x000000000056C000-memory.dmp

Filesize
2.4MB

Download
memory/4748-135-0x0000000005270000-0x0000000005292000-memory.dmp

Filesize
136KB

Download
memory/4748-134-0x0000000004EB0000-0x0000000004EC0000-memory.dmp

Filesize
64KB

Download

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