remcos | b99c76fab8d884a5a2d666fd55ae4864dc7d3b8df41cb82b4cd86191fc29cd9c

General

Target

576a59ec53a793a1b7af08b3b98a70c0N.exe
Size

1.7MB
MD5

576a59ec53a793a1b7af08b3b98a70c0
SHA1

794bc51e8bec98659ea7640c8d6bb836fdfd4c5f
SHA256

b99c76fab8d884a5a2d666fd55ae4864dc7d3b8df41cb82b4cd86191fc29cd9c
SHA512

f73f006c0ba46c18121d9d1110418f8422622c377d14398cbd3ec765c9c670a358a87b6540400028e6489620735269bb543d2e89b368168762d691aa2b45885a
SSDEEP

24576:QD39v74lfGQrFUspugRNJI2DJ53J/J/L5dJPj8/j7v/:Qp7E+QrFUBgq2u

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
2676	sbietrcl.exe
2860	sbietrcl.exe

Loads dropped DLL 1 IoCs

pid	Process
2652	576a59ec53a793a1b7af08b3b98a70c0N.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-1-5-21-3434294380-2554721341-1919518612-1000\Software\Microsoft\Windows\CurrentVersion\Run\Application = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Templates\\sbietrcl.exe"	576a59ec53a793a1b7af08b3b98a70c0N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2676 set thread context of 2860	2676	sbietrcl.exe	32

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	sbietrcl.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	576a59ec53a793a1b7af08b3b98a70c0N.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
2652	576a59ec53a793a1b7af08b3b98a70c0N.exe
2652	576a59ec53a793a1b7af08b3b98a70c0N.exe
2652	576a59ec53a793a1b7af08b3b98a70c0N.exe
2652	576a59ec53a793a1b7af08b3b98a70c0N.exe
2652	576a59ec53a793a1b7af08b3b98a70c0N.exe
2652	576a59ec53a793a1b7af08b3b98a70c0N.exe
2676	sbietrcl.exe
2676	sbietrcl.exe
2676	sbietrcl.exe
2676	sbietrcl.exe
2676	sbietrcl.exe
2676	sbietrcl.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2652	576a59ec53a793a1b7af08b3b98a70c0N.exe
Token: SeDebugPrivilege	2676	sbietrcl.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2652 wrote to memory of 2676	2652	576a59ec53a793a1b7af08b3b98a70c0N.exe	31
PID 2652 wrote to memory of 2676	2652	576a59ec53a793a1b7af08b3b98a70c0N.exe	31
PID 2652 wrote to memory of 2676	2652	576a59ec53a793a1b7af08b3b98a70c0N.exe	31
PID 2652 wrote to memory of 2676	2652	576a59ec53a793a1b7af08b3b98a70c0N.exe	31
PID 2676 wrote to memory of 2860	2676	sbietrcl.exe	32
PID 2676 wrote to memory of 2860	2676	sbietrcl.exe	32
PID 2676 wrote to memory of 2860	2676	sbietrcl.exe	32
PID 2676 wrote to memory of 2860	2676	sbietrcl.exe	32
PID 2676 wrote to memory of 2860	2676	sbietrcl.exe	32
PID 2676 wrote to memory of 2860	2676	sbietrcl.exe	32
PID 2676 wrote to memory of 2860	2676	sbietrcl.exe	32
PID 2676 wrote to memory of 2860	2676	sbietrcl.exe	32
PID 2676 wrote to memory of 2860	2676	sbietrcl.exe	32
PID 2676 wrote to memory of 2860	2676	sbietrcl.exe	32

C:\Users\Admin\AppData\Local\Temp\576a59ec53a793a1b7af08b3b98a70c0N.exe
"C:\Users\Admin\AppData\Local\Temp\576a59ec53a793a1b7af08b3b98a70c0N.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:2652
- 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:2676
- - 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:2860

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\Local\Temp\CabF42E.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

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

Filesize
1.7MB

MD5
146b936cee509ae15e11ef0ad503797f

SHA1
ee58b832df67c91937d5a995dd9d6eeae3555049

SHA256
5b43d640e6bb9ff85e93e5934ac014c39f6b17476dcf0f16d7f15aee76486a27

SHA512
fc724a56fb0b426ded3af0f17fcf02361228b7898bf2db72f7f85187197672a25bf5e2a988bb51eee59940db26eb9a5cd10c708568ec6b90109c56cdfe0489d8

Download Submit
memory/2652-11-0x0000000074020000-0x00000000745CB000-memory.dmp

Filesize
5.7MB

Download
memory/2652-0-0x0000000074021000-0x0000000074022000-memory.dmp

Filesize
4KB

Download
memory/2652-2-0x0000000074020000-0x00000000745CB000-memory.dmp

Filesize
5.7MB

Download
memory/2652-29-0x0000000074020000-0x00000000745CB000-memory.dmp

Filesize
5.7MB

Download
memory/2652-1-0x0000000074020000-0x00000000745CB000-memory.dmp

Filesize
5.7MB

Download
memory/2652-10-0x0000000074020000-0x00000000745CB000-memory.dmp

Filesize
5.7MB

Download
memory/2676-54-0x0000000074020000-0x00000000745CB000-memory.dmp

Filesize
5.7MB

Download
memory/2676-30-0x0000000074020000-0x00000000745CB000-memory.dmp

Filesize
5.7MB

Download
memory/2676-38-0x0000000074020000-0x00000000745CB000-memory.dmp

Filesize
5.7MB

Download
memory/2676-39-0x0000000074020000-0x00000000745CB000-memory.dmp

Filesize
5.7MB

Download
memory/2860-45-0x0000000000080000-0x0000000000097000-memory.dmp

Filesize
92KB

Download
memory/2860-51-0x0000000000080000-0x0000000000097000-memory.dmp

Filesize
92KB

Download
memory/2860-47-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2860-46-0x0000000000080000-0x0000000000097000-memory.dmp

Filesize
92KB

Download
memory/2860-43-0x0000000000080000-0x0000000000097000-memory.dmp

Filesize
92KB

Download
memory/2860-42-0x0000000000080000-0x0000000000097000-memory.dmp

Filesize
92KB

Download
memory/2860-40-0x0000000000080000-0x0000000000097000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads