remcos | b3fa7c61b863e682a33b8f9059dd567a189f339ea94bf5aa96aeb3ab99e0bd5b

General

Target

b3fa7c61b863e682a33b8f9059dd567a189f339ea94bf5aa96aeb3ab99e0bd5bN.exe
Size

1.0MB
MD5

4dde298c36c37c3f07c7bf65213c2f50
SHA1

c7655d68e8437df0638c8af818830fb767e05872
SHA256

b3fa7c61b863e682a33b8f9059dd567a189f339ea94bf5aa96aeb3ab99e0bd5b
SHA512

6f416bb005ad5df0cdce3125aa2f0eca01e88b8909c0c1695cb369b1b8a3eefeaf3f7c3895b4c1a211e5856bd317e6a9419c10e6f5cb2ffe2869d9ce8e47d170
SSDEEP

12288:SfeDOa9rDeYSorINpj5XqkJD0QrOod7XxlW91RRep+rgRNyA55IxJ2DJW//oK1:xD39v74lfGQrFUspugRNJI2DJW//oe

Score

10^/10

remcos host discovery persistence rat

Malware Config

Extracted

Family

remcos

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
Remcos family
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	b3fa7c61b863e682a33b8f9059dd567a189f339ea94bf5aa96aeb3ab99e0bd5bN.exe

Executes dropped EXE 2 IoCs

pid	Process
3684	sbietrcl.exe
3700	sbietrcl.exe

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"	b3fa7c61b863e682a33b8f9059dd567a189f339ea94bf5aa96aeb3ab99e0bd5bN.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3684 set thread context of 3700	3684	sbietrcl.exe	83

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 2 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	b3fa7c61b863e682a33b8f9059dd567a189f339ea94bf5aa96aeb3ab99e0bd5bN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sbietrcl.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
688	b3fa7c61b863e682a33b8f9059dd567a189f339ea94bf5aa96aeb3ab99e0bd5bN.exe
688	b3fa7c61b863e682a33b8f9059dd567a189f339ea94bf5aa96aeb3ab99e0bd5bN.exe
688	b3fa7c61b863e682a33b8f9059dd567a189f339ea94bf5aa96aeb3ab99e0bd5bN.exe
688	b3fa7c61b863e682a33b8f9059dd567a189f339ea94bf5aa96aeb3ab99e0bd5bN.exe
688	b3fa7c61b863e682a33b8f9059dd567a189f339ea94bf5aa96aeb3ab99e0bd5bN.exe
688	b3fa7c61b863e682a33b8f9059dd567a189f339ea94bf5aa96aeb3ab99e0bd5bN.exe
3684	sbietrcl.exe
3684	sbietrcl.exe
3684	sbietrcl.exe
3684	sbietrcl.exe
3684	sbietrcl.exe
3684	sbietrcl.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	688	b3fa7c61b863e682a33b8f9059dd567a189f339ea94bf5aa96aeb3ab99e0bd5bN.exe
Token: SeDebugPrivilege	3684	sbietrcl.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 688 wrote to memory of 3684	688	b3fa7c61b863e682a33b8f9059dd567a189f339ea94bf5aa96aeb3ab99e0bd5bN.exe	82
PID 688 wrote to memory of 3684	688	b3fa7c61b863e682a33b8f9059dd567a189f339ea94bf5aa96aeb3ab99e0bd5bN.exe	82
PID 688 wrote to memory of 3684	688	b3fa7c61b863e682a33b8f9059dd567a189f339ea94bf5aa96aeb3ab99e0bd5bN.exe	82
PID 3684 wrote to memory of 3700	3684	sbietrcl.exe	83
PID 3684 wrote to memory of 3700	3684	sbietrcl.exe	83
PID 3684 wrote to memory of 3700	3684	sbietrcl.exe	83
PID 3684 wrote to memory of 3700	3684	sbietrcl.exe	83
PID 3684 wrote to memory of 3700	3684	sbietrcl.exe	83
PID 3684 wrote to memory of 3700	3684	sbietrcl.exe	83
PID 3684 wrote to memory of 3700	3684	sbietrcl.exe	83
PID 3684 wrote to memory of 3700	3684	sbietrcl.exe	83
PID 3684 wrote to memory of 3700	3684	sbietrcl.exe	83

C:\Users\Admin\AppData\Local\Temp\b3fa7c61b863e682a33b8f9059dd567a189f339ea94bf5aa96aeb3ab99e0bd5bN.exe
"C:\Users\Admin\AppData\Local\Temp\b3fa7c61b863e682a33b8f9059dd567a189f339ea94bf5aa96aeb3ab99e0bd5bN.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:688
- 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:3684
- - C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe
    "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe"
    3⤵
    - Executes dropped EXE
    PID:3700

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

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
1.0MB

MD5
22070d573f8582044457ac802e4cd693

SHA1
cdaa2fc1560f1fde6a42b9619de8ec543b579761

SHA256
568967c6a4f131dd90db4778e4c6a81f43c15c36a06fb88b70e36f4759b2ab66

SHA512
4a25f9e6a43822f8370a4152eaaf2a3848250f10f9d633a48fca2fe66ee9bdd6026bdba0752d378d4256e15195c9d5a4ce3053f3cea92c59265fe9f8f090ea1b

Download Submit
memory/688-19-0x0000000075330000-0x00000000758E1000-memory.dmp

Filesize
5.7MB

Download
memory/688-30-0x0000000075330000-0x00000000758E1000-memory.dmp

Filesize
5.7MB

Download
memory/688-5-0x0000000075330000-0x00000000758E1000-memory.dmp

Filesize
5.7MB

Download
memory/688-6-0x0000000075330000-0x00000000758E1000-memory.dmp

Filesize
5.7MB

Download
memory/688-18-0x0000000075332000-0x0000000075333000-memory.dmp

Filesize
4KB

Download
memory/688-0-0x0000000075332000-0x0000000075333000-memory.dmp

Filesize
4KB

Download
memory/688-1-0x0000000075330000-0x00000000758E1000-memory.dmp

Filesize
5.7MB

Download
memory/688-2-0x0000000075330000-0x00000000758E1000-memory.dmp

Filesize
5.7MB

Download
memory/3684-32-0x0000000075330000-0x00000000758E1000-memory.dmp

Filesize
5.7MB

Download
memory/3684-31-0x0000000075330000-0x00000000758E1000-memory.dmp

Filesize
5.7MB

Download
memory/3684-33-0x0000000075330000-0x00000000758E1000-memory.dmp

Filesize
5.7MB

Download
memory/3684-34-0x0000000075330000-0x00000000758E1000-memory.dmp

Filesize
5.7MB

Download
memory/3684-41-0x0000000075330000-0x00000000758E1000-memory.dmp

Filesize
5.7MB

Download
memory/3700-37-0x00000000007A0000-0x00000000007B7000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads