remcos | ac9b3940156f969f14c8fef3a5045a78a73b01688f26c4382b1a9d33d56b1d88

General

Target

ac9b3940156f969f14c8fef3a5045a78a73b01688f26c4382b1a9d33d56b1d88N.exe
Size

2.2MB
MD5

2ba978739de23b8c1502b939ee968f80
SHA1

02d2c80bb2ab4fe45e4a5740b8b6d648595d84d5
SHA256

ac9b3940156f969f14c8fef3a5045a78a73b01688f26c4382b1a9d33d56b1d88
SHA512

b3e6eca7351571838fe6ba46c73552836972b9fd1d9313164a79b5540db7bbdcd80345ae4f8e0ac341a2012240267e78d021f953c09c8840ffe01e1d7bfe8169
SSDEEP

24576:HD39v74lfGQrFUspugRNJI2DJ53J/J/L5dJPjYF4avnXJJjRHc:Hp7E+QrFUBgq2SnJc

Score

10^/10

remcos host discovery persistence rat spyware stealer

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

C2

213.183.58.19:4000

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
remcos.exe
copy_folder
remcos
delete_file
false
hide_file
false
hide_keylog_file
true
install_flag
false
install_path
%AppData%
keylog_crypt
true
keylog_file
read.dat
keylog_flag
false
keylog_folder
CastC
keylog_path
%AppData%
mouse_option
false
mutex
remcos_sccafsoidz
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screens
screenshot_path
%AppData%
screenshot_time
1
startup_value
remcos
take_screenshot_option
false
take_screenshot_time
5

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	ac9b3940156f969f14c8fef3a5045a78a73b01688f26c4382b1a9d33d56b1d88N.exe

Executes dropped EXE 2 IoCs

pid	Process
4084	sbietrcl.exe
868	sbietrcl.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Application = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Templates\\sbietrcl.exe"	ac9b3940156f969f14c8fef3a5045a78a73b01688f26c4382b1a9d33d56b1d88N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4084 set thread context of 868	4084	sbietrcl.exe	89

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ac9b3940156f969f14c8fef3a5045a78a73b01688f26c4382b1a9d33d56b1d88N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sbietrcl.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sbietrcl.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
5084	ac9b3940156f969f14c8fef3a5045a78a73b01688f26c4382b1a9d33d56b1d88N.exe
5084	ac9b3940156f969f14c8fef3a5045a78a73b01688f26c4382b1a9d33d56b1d88N.exe
5084	ac9b3940156f969f14c8fef3a5045a78a73b01688f26c4382b1a9d33d56b1d88N.exe
5084	ac9b3940156f969f14c8fef3a5045a78a73b01688f26c4382b1a9d33d56b1d88N.exe
5084	ac9b3940156f969f14c8fef3a5045a78a73b01688f26c4382b1a9d33d56b1d88N.exe
5084	ac9b3940156f969f14c8fef3a5045a78a73b01688f26c4382b1a9d33d56b1d88N.exe
4084	sbietrcl.exe
4084	sbietrcl.exe
4084	sbietrcl.exe
4084	sbietrcl.exe
4084	sbietrcl.exe
4084	sbietrcl.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5084	ac9b3940156f969f14c8fef3a5045a78a73b01688f26c4382b1a9d33d56b1d88N.exe
Token: SeDebugPrivilege	4084	sbietrcl.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
868	sbietrcl.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 5084 wrote to memory of 4084	5084	ac9b3940156f969f14c8fef3a5045a78a73b01688f26c4382b1a9d33d56b1d88N.exe	88
PID 5084 wrote to memory of 4084	5084	ac9b3940156f969f14c8fef3a5045a78a73b01688f26c4382b1a9d33d56b1d88N.exe	88
PID 5084 wrote to memory of 4084	5084	ac9b3940156f969f14c8fef3a5045a78a73b01688f26c4382b1a9d33d56b1d88N.exe	88
PID 4084 wrote to memory of 868	4084	sbietrcl.exe	89
PID 4084 wrote to memory of 868	4084	sbietrcl.exe	89
PID 4084 wrote to memory of 868	4084	sbietrcl.exe	89
PID 4084 wrote to memory of 868	4084	sbietrcl.exe	89
PID 4084 wrote to memory of 868	4084	sbietrcl.exe	89
PID 4084 wrote to memory of 868	4084	sbietrcl.exe	89
PID 4084 wrote to memory of 868	4084	sbietrcl.exe	89
PID 4084 wrote to memory of 868	4084	sbietrcl.exe	89
PID 4084 wrote to memory of 868	4084	sbietrcl.exe	89

C:\Users\Admin\AppData\Local\Temp\ac9b3940156f969f14c8fef3a5045a78a73b01688f26c4382b1a9d33d56b1d88N.exe
"C:\Users\Admin\AppData\Local\Temp\ac9b3940156f969f14c8fef3a5045a78a73b01688f26c4382b1a9d33d56b1d88N.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5084
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4084
- - C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe
    "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:868

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe

Filesize
2.2MB

MD5
a7edc0938a75eda7d920d3f01353582e

SHA1
73316fa8f8af8bed4ac152c84489345053cf279f

SHA256
b9530b497d65daac72d105017999b7f361175766cbfcf7a2ca80857568388963

SHA512
b07052f6e6dea51a9b67bba965618892e4e84a035938628a42facf17ee397201d4e1d7295b95a534166688d4531d8e98cf6b3621916077de23b83e5c8d827801

Download Submit
memory/868-35-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/868-49-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/868-45-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/868-40-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/868-44-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/868-43-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/868-38-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4084-32-0x0000000074C60000-0x0000000075211000-memory.dmp

Filesize
5.7MB

Download
memory/4084-31-0x0000000074C60000-0x0000000075211000-memory.dmp

Filesize
5.7MB

Download
memory/4084-33-0x0000000074C60000-0x0000000075211000-memory.dmp

Filesize
5.7MB

Download
memory/4084-34-0x0000000074C60000-0x0000000075211000-memory.dmp

Filesize
5.7MB

Download
memory/4084-46-0x0000000074C60000-0x0000000075211000-memory.dmp

Filesize
5.7MB

Download
memory/5084-0-0x0000000074C62000-0x0000000074C63000-memory.dmp

Filesize
4KB

Download
memory/5084-30-0x0000000074C60000-0x0000000075211000-memory.dmp

Filesize
5.7MB

Download
memory/5084-19-0x0000000074C60000-0x0000000075211000-memory.dmp

Filesize
5.7MB

Download
memory/5084-18-0x0000000074C62000-0x0000000074C63000-memory.dmp

Filesize
4KB

Download
memory/5084-6-0x0000000074C60000-0x0000000075211000-memory.dmp

Filesize
5.7MB

Download
memory/5084-5-0x0000000074C60000-0x0000000075211000-memory.dmp

Filesize
5.7MB

Download
memory/5084-2-0x0000000074C60000-0x0000000075211000-memory.dmp

Filesize
5.7MB

Download
memory/5084-1-0x0000000074C60000-0x0000000075211000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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