remcos | b6939e8e61e85a961ffe02f0c9104e8b109e9a05746123a2c8d2df0755d91edc

General

Target

b6939e8e61e85a961ffe02f0c9104e8b109e9a05746123a2c8d2df0755d91edcN.exe
Size

2.2MB
MD5

a5772d2e4b88816004fd474cae1424e0
SHA1

1dca21ff19ce0b88347cb62bd8f6b3851fd47a62
SHA256

b6939e8e61e85a961ffe02f0c9104e8b109e9a05746123a2c8d2df0755d91edc
SHA512

e96769e11290a709a77f8eb183f16bb06f37c68bc255ef2bc2a5d56e63cde4aaf35918c1d41f87cc075e840650b3199cb49a3ba473aedadd218df6ae3211bf89
SSDEEP

24576:XD39v74lfGQrFUspugRNJI2DJ53J/J/L5dJPjYF4avnXJJJ7:Xp7E+QrFUBgq2Snx

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

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-1-5-21-1194130065-3471212556-1656947724-1000\Control Panel\International\Geo\Nation	b6939e8e61e85a961ffe02f0c9104e8b109e9a05746123a2c8d2df0755d91edcN.exe

Executes dropped EXE 2 IoCs

pid	Process
2096	sbietrcl.exe
4436	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-1-5-21-1194130065-3471212556-1656947724-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Application = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Templates\\sbietrcl.exe"	b6939e8e61e85a961ffe02f0c9104e8b109e9a05746123a2c8d2df0755d91edcN.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2096 set thread context of 4436	2096	sbietrcl.exe	87

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	b6939e8e61e85a961ffe02f0c9104e8b109e9a05746123a2c8d2df0755d91edcN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sbietrcl.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
3116	b6939e8e61e85a961ffe02f0c9104e8b109e9a05746123a2c8d2df0755d91edcN.exe
3116	b6939e8e61e85a961ffe02f0c9104e8b109e9a05746123a2c8d2df0755d91edcN.exe
3116	b6939e8e61e85a961ffe02f0c9104e8b109e9a05746123a2c8d2df0755d91edcN.exe
3116	b6939e8e61e85a961ffe02f0c9104e8b109e9a05746123a2c8d2df0755d91edcN.exe
3116	b6939e8e61e85a961ffe02f0c9104e8b109e9a05746123a2c8d2df0755d91edcN.exe
3116	b6939e8e61e85a961ffe02f0c9104e8b109e9a05746123a2c8d2df0755d91edcN.exe
2096	sbietrcl.exe
2096	sbietrcl.exe
2096	sbietrcl.exe
2096	sbietrcl.exe
2096	sbietrcl.exe
2096	sbietrcl.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3116	b6939e8e61e85a961ffe02f0c9104e8b109e9a05746123a2c8d2df0755d91edcN.exe
Token: SeDebugPrivilege	2096	sbietrcl.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3116 wrote to memory of 2096	3116	b6939e8e61e85a961ffe02f0c9104e8b109e9a05746123a2c8d2df0755d91edcN.exe	86
PID 3116 wrote to memory of 2096	3116	b6939e8e61e85a961ffe02f0c9104e8b109e9a05746123a2c8d2df0755d91edcN.exe	86
PID 3116 wrote to memory of 2096	3116	b6939e8e61e85a961ffe02f0c9104e8b109e9a05746123a2c8d2df0755d91edcN.exe	86
PID 2096 wrote to memory of 4436	2096	sbietrcl.exe	87
PID 2096 wrote to memory of 4436	2096	sbietrcl.exe	87
PID 2096 wrote to memory of 4436	2096	sbietrcl.exe	87
PID 2096 wrote to memory of 4436	2096	sbietrcl.exe	87
PID 2096 wrote to memory of 4436	2096	sbietrcl.exe	87
PID 2096 wrote to memory of 4436	2096	sbietrcl.exe	87
PID 2096 wrote to memory of 4436	2096	sbietrcl.exe	87
PID 2096 wrote to memory of 4436	2096	sbietrcl.exe	87
PID 2096 wrote to memory of 4436	2096	sbietrcl.exe	87

C:\Users\Admin\AppData\Local\Temp\b6939e8e61e85a961ffe02f0c9104e8b109e9a05746123a2c8d2df0755d91edcN.exe
"C:\Users\Admin\AppData\Local\Temp\b6939e8e61e85a961ffe02f0c9104e8b109e9a05746123a2c8d2df0755d91edcN.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:3116
- 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:2096
- - 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:4436

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
2.2MB

MD5
74e6a19c5beb7e6b067b8de49ff81c97

SHA1
b2fc987c9cde54ebbf8f1fd85f30955893886b34

SHA256
96f096060b4ed457905a0ffa914dbaa56a7ab635d45137197ab078053ad5f1fa

SHA512
527fd10547c65e6829a2e0a272fe40945169d821bbcdc39b5f86d6493de770d171e897fdf193c22942385c7c1124c71cc3ac8aa6a0641982de75c3783ea1bde2

Download Submit
memory/2096-31-0x00000000752C0000-0x0000000075871000-memory.dmp

Filesize
5.7MB

Download
memory/2096-30-0x00000000752C0000-0x0000000075871000-memory.dmp

Filesize
5.7MB

Download
memory/2096-32-0x00000000752C0000-0x0000000075871000-memory.dmp

Filesize
5.7MB

Download
memory/2096-33-0x00000000752C0000-0x0000000075871000-memory.dmp

Filesize
5.7MB

Download
memory/2096-39-0x00000000752C0000-0x0000000075871000-memory.dmp

Filesize
5.7MB

Download
memory/3116-2-0x00000000752C0000-0x0000000075871000-memory.dmp

Filesize
5.7MB

Download
memory/3116-5-0x00000000752C0000-0x0000000075871000-memory.dmp

Filesize
5.7MB

Download
memory/3116-17-0x00000000752C2000-0x00000000752C3000-memory.dmp

Filesize
4KB

Download
memory/3116-18-0x00000000752C0000-0x0000000075871000-memory.dmp

Filesize
5.7MB

Download
memory/3116-1-0x00000000752C0000-0x0000000075871000-memory.dmp

Filesize
5.7MB

Download
memory/3116-29-0x00000000752C0000-0x0000000075871000-memory.dmp

Filesize
5.7MB

Download
memory/3116-0-0x00000000752C2000-0x00000000752C3000-memory.dmp

Filesize
4KB

Download
memory/4436-35-0x00000000005A0000-0x00000000005B7000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads