remcos | ffae3a0767f2b231876cfd87c418931e15dc5a675774d39a86ed0193322a2951

General

Target

ebf0465a5f3713ec6dde96f33bf91040N.exe
Size

2.0MB
MD5

ebf0465a5f3713ec6dde96f33bf91040
SHA1

1698cdcc8b0a4e32ae670bb5fa97864bd5c86266
SHA256

ffae3a0767f2b231876cfd87c418931e15dc5a675774d39a86ed0193322a2951
SHA512

bcdcb40224ecc7f3fa23081e01ca693a8dd2cd06234af245d2b3a047f372aefda0689b3010e5345a5d44ee3a6ee8e462a9263db719f10ae883fe86006b9fd152
SSDEEP

24576:YD39v74lfGQrFUspugRNJI2DJ53J/J/L56+JYJXBRvlceiJoR:Yp7E+QrFUBgq2Yco

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

Executes dropped EXE 2 IoCs

pid	Process
2156	sbietrcl.exe
2380	sbietrcl.exe

Loads dropped DLL 1 IoCs

pid	Process
3028	ebf0465a5f3713ec6dde96f33bf91040N.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-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Run\Application = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Templates\\sbietrcl.exe"	ebf0465a5f3713ec6dde96f33bf91040N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2156 set thread context of 2380	2156	sbietrcl.exe	31

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	ebf0465a5f3713ec6dde96f33bf91040N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sbietrcl.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
3028	ebf0465a5f3713ec6dde96f33bf91040N.exe
3028	ebf0465a5f3713ec6dde96f33bf91040N.exe
3028	ebf0465a5f3713ec6dde96f33bf91040N.exe
3028	ebf0465a5f3713ec6dde96f33bf91040N.exe
3028	ebf0465a5f3713ec6dde96f33bf91040N.exe
3028	ebf0465a5f3713ec6dde96f33bf91040N.exe
2156	sbietrcl.exe
2156	sbietrcl.exe
2156	sbietrcl.exe
2156	sbietrcl.exe
2156	sbietrcl.exe
2156	sbietrcl.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3028	ebf0465a5f3713ec6dde96f33bf91040N.exe
Token: SeDebugPrivilege	2156	sbietrcl.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 3028 wrote to memory of 2156	3028	ebf0465a5f3713ec6dde96f33bf91040N.exe	30
PID 3028 wrote to memory of 2156	3028	ebf0465a5f3713ec6dde96f33bf91040N.exe	30
PID 3028 wrote to memory of 2156	3028	ebf0465a5f3713ec6dde96f33bf91040N.exe	30
PID 3028 wrote to memory of 2156	3028	ebf0465a5f3713ec6dde96f33bf91040N.exe	30
PID 2156 wrote to memory of 2380	2156	sbietrcl.exe	31
PID 2156 wrote to memory of 2380	2156	sbietrcl.exe	31
PID 2156 wrote to memory of 2380	2156	sbietrcl.exe	31
PID 2156 wrote to memory of 2380	2156	sbietrcl.exe	31
PID 2156 wrote to memory of 2380	2156	sbietrcl.exe	31
PID 2156 wrote to memory of 2380	2156	sbietrcl.exe	31
PID 2156 wrote to memory of 2380	2156	sbietrcl.exe	31
PID 2156 wrote to memory of 2380	2156	sbietrcl.exe	31
PID 2156 wrote to memory of 2380	2156	sbietrcl.exe	31
PID 2156 wrote to memory of 2380	2156	sbietrcl.exe	31

C:\Users\Admin\AppData\Local\Temp\ebf0465a5f3713ec6dde96f33bf91040N.exe
"C:\Users\Admin\AppData\Local\Temp\ebf0465a5f3713ec6dde96f33bf91040N.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3028
- 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:2156
- - 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:2380

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

System Information Discovery

1

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\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

Filesize
342B

MD5
c9b75a6e47204e45c9a410e10f7b24ed

SHA1
52c2f43e67ffa91bad3fce1431e428560b7b5caa

SHA256
37a357e8a9088b6c35aa3c719ed178edbd23ab75fbd34a66a1c277346c68eba6

SHA512
d508589fd4d6706d1ef28b4b2a3144b187d093bb23d130ce5e2aafcc37126d8afa621da5c6a0126a5d5585e519f4c14a56362cd781d1565c9e238d500b0c403c

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

Filesize
342B

MD5
690239f49a408bc8266db50324514dc5

SHA1
bfe98ade547cf5f32a869711cccb5e0c66c5601d

SHA256
4e629196e4918be6deeee16a276bbb10dcc492242914e95e5bd1dcf3dff5ab6d

SHA512
49a407ba7e3d3b532b86fcbe53de65cd1c15438e0d04dccdc661c8f2466528150a987a0000a2eb909c122395227d41da0af90f7ec24395fda4728bfa1063d5d4

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cab26D4.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar2706.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe

Filesize
2.0MB

MD5
f5a40770d996ae1261abc059bb2f7140

SHA1
4a4caaad30e39034ffce5ae35645c92412142f86

SHA256
2d19914f79845c20aba29d85a120497d4519c27619a562700d34cd1f380a36a4

SHA512
43006318a923e1a1d242353fb867cb1ba3e751a2ac96fc9925ee5b2b55de84cc71ebb609189fb72dd60e8f25f5968049b556c40bdb3b1abc37e8348c509e53db

Download Submit
memory/2156-192-0x0000000074090000-0x000000007463B000-memory.dmp

Filesize
5.7MB

Download
memory/2156-211-0x0000000074090000-0x000000007463B000-memory.dmp

Filesize
5.7MB

Download
memory/2380-203-0x0000000000080000-0x0000000000097000-memory.dmp

Filesize
92KB

Download
memory/2380-208-0x0000000000080000-0x0000000000097000-memory.dmp

Filesize
92KB

Download
memory/2380-205-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2380-195-0x0000000000080000-0x0000000000097000-memory.dmp

Filesize
92KB

Download
memory/2380-201-0x0000000000080000-0x0000000000097000-memory.dmp

Filesize
92KB

Download
memory/2380-199-0x0000000000080000-0x0000000000097000-memory.dmp

Filesize
92KB

Download
memory/2380-197-0x0000000000080000-0x0000000000097000-memory.dmp

Filesize
92KB

Download
memory/3028-0-0x0000000074091000-0x0000000074092000-memory.dmp

Filesize
4KB

Download
memory/3028-165-0x0000000074090000-0x000000007463B000-memory.dmp

Filesize
5.7MB

Download
memory/3028-164-0x0000000074090000-0x000000007463B000-memory.dmp

Filesize
5.7MB

Download
memory/3028-1-0x0000000074090000-0x000000007463B000-memory.dmp

Filesize
5.7MB

Download
memory/3028-183-0x0000000074090000-0x000000007463B000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads