remcos | a0689d1813455bd0dac6fd38c1c937c282c5e50082613fd2efb572f371909665

General

Target

a0689d1813455bd0dac6fd38c1c937c282c5e50082613fd2efb572f371909665N.exe
Size

2.1MB
MD5

16e210feb0e8e06172d167f9b6fa56d0
SHA1

8abfac6dd663323c6e1b86a00d7c61ef9e6e4206
SHA256

a0689d1813455bd0dac6fd38c1c937c282c5e50082613fd2efb572f371909665
SHA512

6aaa8cba97c779a940cdcc275e5bb774424cceb9a4e644bd713f7722dd604f17427379597670a971ed52f71fbcfc83e7267c3c53f7783728393dfc81edd019db
SSDEEP

24576:+D39v74lfGQrFUspugRNJI2DJ53J/J/L5dJPj8/j73AneLKJJb:+p7E+QrFUBgq21

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
2756	sbietrcl.exe
2520	sbietrcl.exe

Loads dropped DLL 1 IoCs

pid	Process
3000	a0689d1813455bd0dac6fd38c1c937c282c5e50082613fd2efb572f371909665N.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-1-5-21-457978338-2990298471-2379561640-1000\Software\Microsoft\Windows\CurrentVersion\Run\Application = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Templates\\sbietrcl.exe"	a0689d1813455bd0dac6fd38c1c937c282c5e50082613fd2efb572f371909665N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2756 set thread context of 2520	2756	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	a0689d1813455bd0dac6fd38c1c937c282c5e50082613fd2efb572f371909665N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sbietrcl.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
3000	a0689d1813455bd0dac6fd38c1c937c282c5e50082613fd2efb572f371909665N.exe
3000	a0689d1813455bd0dac6fd38c1c937c282c5e50082613fd2efb572f371909665N.exe
3000	a0689d1813455bd0dac6fd38c1c937c282c5e50082613fd2efb572f371909665N.exe
3000	a0689d1813455bd0dac6fd38c1c937c282c5e50082613fd2efb572f371909665N.exe
3000	a0689d1813455bd0dac6fd38c1c937c282c5e50082613fd2efb572f371909665N.exe
3000	a0689d1813455bd0dac6fd38c1c937c282c5e50082613fd2efb572f371909665N.exe
2756	sbietrcl.exe
2756	sbietrcl.exe
2756	sbietrcl.exe
2756	sbietrcl.exe
2756	sbietrcl.exe
2756	sbietrcl.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3000	a0689d1813455bd0dac6fd38c1c937c282c5e50082613fd2efb572f371909665N.exe
Token: SeDebugPrivilege	2756	sbietrcl.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 3000 wrote to memory of 2756	3000	a0689d1813455bd0dac6fd38c1c937c282c5e50082613fd2efb572f371909665N.exe	30
PID 3000 wrote to memory of 2756	3000	a0689d1813455bd0dac6fd38c1c937c282c5e50082613fd2efb572f371909665N.exe	30
PID 3000 wrote to memory of 2756	3000	a0689d1813455bd0dac6fd38c1c937c282c5e50082613fd2efb572f371909665N.exe	30
PID 3000 wrote to memory of 2756	3000	a0689d1813455bd0dac6fd38c1c937c282c5e50082613fd2efb572f371909665N.exe	30
PID 2756 wrote to memory of 2520	2756	sbietrcl.exe	31
PID 2756 wrote to memory of 2520	2756	sbietrcl.exe	31
PID 2756 wrote to memory of 2520	2756	sbietrcl.exe	31
PID 2756 wrote to memory of 2520	2756	sbietrcl.exe	31
PID 2756 wrote to memory of 2520	2756	sbietrcl.exe	31
PID 2756 wrote to memory of 2520	2756	sbietrcl.exe	31
PID 2756 wrote to memory of 2520	2756	sbietrcl.exe	31
PID 2756 wrote to memory of 2520	2756	sbietrcl.exe	31
PID 2756 wrote to memory of 2520	2756	sbietrcl.exe	31
PID 2756 wrote to memory of 2520	2756	sbietrcl.exe	31

C:\Users\Admin\AppData\Local\Temp\a0689d1813455bd0dac6fd38c1c937c282c5e50082613fd2efb572f371909665N.exe
"C:\Users\Admin\AppData\Local\Temp\a0689d1813455bd0dac6fd38c1c937c282c5e50082613fd2efb572f371909665N.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:3000
- 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:2756
- - 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:2520

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
244a8f3d66fcc1f78bacd0f0690e2d31

SHA1
e8f2e5890a14dfb9b50610cdba437b375decb09a

SHA256
c7f96b65430e2a6538deeef6f01655211b53f730abb5178c5ce353878a562fed

SHA512
aee9841f6fa1cfcacc59a7f2fae10f1c323aacf8af8ec11407f039bdc015d108a916d38a8bb3337bb6f89aae707e2577069b17111cec24938c2a1cc51eef8805

Download Submit
C:\Users\Admin\AppData\Local\Temp\CabA229.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

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

Filesize
2.1MB

MD5
3d882da1c8775b4f04275ea29df24e24

SHA1
d99e42bdaeb1f43c0b01f09289ef792456961c2b

SHA256
2e5709bdb2ee72e2d998a1225fc00d9515d511906c1fd0759188eb4527874c5b

SHA512
ead80ae7816286e0c575a139bd36f52cf196745a0b60c9c78ce227dd7319d67dbe88c96e1a81882d8ce8efad715f0ef3f0dfa14ecc500cb5d59fc394cbc607bd

Download Submit
memory/2520-50-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2520-44-0x0000000000080000-0x0000000000097000-memory.dmp

Filesize
92KB

Download
memory/2520-46-0x0000000000080000-0x0000000000097000-memory.dmp

Filesize
92KB

Download
memory/2520-47-0x0000000000080000-0x0000000000097000-memory.dmp

Filesize
92KB

Download
memory/2520-48-0x0000000000080000-0x0000000000097000-memory.dmp

Filesize
92KB

Download
memory/2520-49-0x0000000000080000-0x0000000000097000-memory.dmp

Filesize
92KB

Download
memory/2520-54-0x0000000000080000-0x0000000000097000-memory.dmp

Filesize
92KB

Download
memory/2756-32-0x0000000074AF0000-0x000000007509B000-memory.dmp

Filesize
5.7MB

Download
memory/2756-42-0x0000000074AF0000-0x000000007509B000-memory.dmp

Filesize
5.7MB

Download
memory/2756-43-0x0000000074AF0000-0x000000007509B000-memory.dmp

Filesize
5.7MB

Download
memory/2756-33-0x0000000074AF0000-0x000000007509B000-memory.dmp

Filesize
5.7MB

Download
memory/2756-57-0x0000000074AF0000-0x000000007509B000-memory.dmp

Filesize
5.7MB

Download
memory/3000-1-0x0000000074AF0000-0x000000007509B000-memory.dmp

Filesize
5.7MB

Download
memory/3000-11-0x0000000074AF0000-0x000000007509B000-memory.dmp

Filesize
5.7MB

Download
memory/3000-12-0x0000000074AF0000-0x000000007509B000-memory.dmp

Filesize
5.7MB

Download
memory/3000-31-0x0000000074AF0000-0x000000007509B000-memory.dmp

Filesize
5.7MB

Download
memory/3000-0-0x0000000074AF1000-0x0000000074AF2000-memory.dmp

Filesize
4KB

Download
memory/3000-24-0x0000000074AF0000-0x000000007509B000-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