remcos | 9d0382b562197eae6d94c939b20facd7614b097cb8ad53bf135818d6b854a785

Analysis

max time kernel
150s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
23-03-2023 09:06

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General

Target

NER.exe
Size

1.3MB
MD5

15932ff2fd4d25d706112766560db0be
SHA1

58f23f95ab0b98c90cc532479c584d3e920490b0
SHA256

9d0382b562197eae6d94c939b20facd7614b097cb8ad53bf135818d6b854a785
SHA512

cc00da25f8b0980a5721b7d7b9c1cdfa7c203fe52a43587c3ff54e5d836fd54ec13a41aa28b4655724c56b8b20c60248ee96572a3a65c899256a7ff996942bdd
SSDEEP

24576:sHF0bvDMniKoyitZ2OGBhm9et9pBtV7eSgO5v0jMYuyDwVEXjByQdURaA3T:qFKAnzoyI+h4ugW/YuyDSEzORfT

Score

10^/10

remcos maly 2023-host persistence rat

Malware Config

Extracted

Family

remcos

Botnet

Maly 2023-Host

maly22333.ddnsking.com:3091

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
cos.exe
delete_file
false
hide_file
false
hide_keylog_file
true
install_flag
true
install_path
%AppData%
keylog_crypt
true
keylog_file
logs.dat
keylog_flag
false
mouse_option
false
mutex
Rmc-GY5GD6
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
nsa
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

Processes:

NER.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\International\Geo\Nation NER.exe
Executes dropped EXE 2 IoCs

Processes:

cos.execos.exe

pid process

4404 cos.exe
2548 cos.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\International\Geo\Nation	NER.exe

pid	process
4404	cos.exe
2548	cos.exe

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

cos.exeNER.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\nsa = "\"C:\\Users\\Admin\\AppData\\Roaming\\cos.exe\""	cos.exe
Key created	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Windows\CurrentVersion\Run\	NER.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nsa = "\"C:\\Users\\Admin\\AppData\\Roaming\\cos.exe\""	NER.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	NER.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\nsa = "\"C:\\Users\\Admin\\AppData\\Roaming\\cos.exe\""	NER.exe
Key created	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Windows\CurrentVersion\Run\	cos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nsa = "\"C:\\Users\\Admin\\AppData\\Roaming\\cos.exe\""	cos.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	cos.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

NER.execos.exe

description pid process target process

PID 2464 set thread context of 3984 2464 NER.exe NER.exe
PID 4404 set thread context of 2548 4404 cos.exe cos.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 5 IoCs

Processes:

NER.execos.exe

pid process

2464 NER.exe
2464 NER.exe
2464 NER.exe
4404 cos.exe
4404 cos.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

NER.execos.exe

description pid process

Token: SeDebugPrivilege 2464 NER.exe
Token: SeDebugPrivilege 4404 cos.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

cos.exe

pid process

2548 cos.exe

description	pid	process	target process
PID 2464 set thread context of 3984	2464	NER.exe	NER.exe
PID 4404 set thread context of 2548	4404	cos.exe	cos.exe

pid	process
2464	NER.exe
2464	NER.exe
2464	NER.exe
4404	cos.exe
4404	cos.exe

description	pid	process
Token: SeDebugPrivilege	2464	NER.exe
Token: SeDebugPrivilege	4404	cos.exe

pid	process
2548	cos.exe

Suspicious use of WriteProcessMemory 27 IoCs

Processes:

NER.exeNER.execos.exe

description	pid	process	target process
PID 2464 wrote to memory of 3984	2464	NER.exe	NER.exe
PID 2464 wrote to memory of 3984	2464	NER.exe	NER.exe
PID 2464 wrote to memory of 3984	2464	NER.exe	NER.exe
PID 2464 wrote to memory of 3984	2464	NER.exe	NER.exe
PID 2464 wrote to memory of 3984	2464	NER.exe	NER.exe
PID 2464 wrote to memory of 3984	2464	NER.exe	NER.exe
PID 2464 wrote to memory of 3984	2464	NER.exe	NER.exe
PID 2464 wrote to memory of 3984	2464	NER.exe	NER.exe
PID 2464 wrote to memory of 3984	2464	NER.exe	NER.exe
PID 2464 wrote to memory of 3984	2464	NER.exe	NER.exe
PID 2464 wrote to memory of 3984	2464	NER.exe	NER.exe
PID 2464 wrote to memory of 3984	2464	NER.exe	NER.exe
PID 3984 wrote to memory of 4404	3984	NER.exe	cos.exe
PID 3984 wrote to memory of 4404	3984	NER.exe	cos.exe
PID 3984 wrote to memory of 4404	3984	NER.exe	cos.exe
PID 4404 wrote to memory of 2548	4404	cos.exe	cos.exe
PID 4404 wrote to memory of 2548	4404	cos.exe	cos.exe
PID 4404 wrote to memory of 2548	4404	cos.exe	cos.exe
PID 4404 wrote to memory of 2548	4404	cos.exe	cos.exe
PID 4404 wrote to memory of 2548	4404	cos.exe	cos.exe
PID 4404 wrote to memory of 2548	4404	cos.exe	cos.exe
PID 4404 wrote to memory of 2548	4404	cos.exe	cos.exe
PID 4404 wrote to memory of 2548	4404	cos.exe	cos.exe
PID 4404 wrote to memory of 2548	4404	cos.exe	cos.exe
PID 4404 wrote to memory of 2548	4404	cos.exe	cos.exe
PID 4404 wrote to memory of 2548	4404	cos.exe	cos.exe
PID 4404 wrote to memory of 2548	4404	cos.exe	cos.exe

C:\Users\Admin\AppData\Local\Temp\NER.exe
"C:\Users\Admin\AppData\Local\Temp\NER.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2464
- C:\Users\Admin\AppData\Local\Temp\NER.exe
  "C:\Users\Admin\AppData\Local\Temp\NER.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:3984
- - C:\Users\Admin\AppData\Roaming\cos.exe
    "C:\Users\Admin\AppData\Roaming\cos.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:4404
  - - C:\Users\Admin\AppData\Roaming\cos.exe
      "C:\Users\Admin\AppData\Roaming\cos.exe"
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Suspicious use of SetWindowsHookEx
      PID:2548

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\cos.exe

Filesize
1.3MB

MD5
15932ff2fd4d25d706112766560db0be

SHA1
58f23f95ab0b98c90cc532479c584d3e920490b0

SHA256
9d0382b562197eae6d94c939b20facd7614b097cb8ad53bf135818d6b854a785

SHA512
cc00da25f8b0980a5721b7d7b9c1cdfa7c203fe52a43587c3ff54e5d836fd54ec13a41aa28b4655724c56b8b20c60248ee96572a3a65c899256a7ff996942bdd

Download Submit
C:\Users\Admin\AppData\Roaming\cos.exe

Filesize
1.3MB

MD5
15932ff2fd4d25d706112766560db0be

SHA1
58f23f95ab0b98c90cc532479c584d3e920490b0

SHA256
9d0382b562197eae6d94c939b20facd7614b097cb8ad53bf135818d6b854a785

SHA512
cc00da25f8b0980a5721b7d7b9c1cdfa7c203fe52a43587c3ff54e5d836fd54ec13a41aa28b4655724c56b8b20c60248ee96572a3a65c899256a7ff996942bdd

Download Submit
C:\Users\Admin\AppData\Roaming\cos.exe

Filesize
1.3MB

MD5
15932ff2fd4d25d706112766560db0be

SHA1
58f23f95ab0b98c90cc532479c584d3e920490b0

SHA256
9d0382b562197eae6d94c939b20facd7614b097cb8ad53bf135818d6b854a785

SHA512
cc00da25f8b0980a5721b7d7b9c1cdfa7c203fe52a43587c3ff54e5d836fd54ec13a41aa28b4655724c56b8b20c60248ee96572a3a65c899256a7ff996942bdd

Download Submit
C:\Users\Admin\AppData\Roaming\cos.exe

Filesize
1.3MB

MD5
15932ff2fd4d25d706112766560db0be

SHA1
58f23f95ab0b98c90cc532479c584d3e920490b0

SHA256
9d0382b562197eae6d94c939b20facd7614b097cb8ad53bf135818d6b854a785

SHA512
cc00da25f8b0980a5721b7d7b9c1cdfa7c203fe52a43587c3ff54e5d836fd54ec13a41aa28b4655724c56b8b20c60248ee96572a3a65c899256a7ff996942bdd

Download Submit
memory/2464-134-0x0000000005660000-0x0000000005C04000-memory.dmp

Filesize
5.6MB

Download
memory/2464-135-0x0000000005190000-0x0000000005222000-memory.dmp

Filesize
584KB

Download
memory/2464-136-0x0000000004F30000-0x0000000004F40000-memory.dmp

Filesize
64KB

Download
memory/2464-137-0x0000000005180000-0x000000000518A000-memory.dmp

Filesize
40KB

Download
memory/2464-138-0x0000000008060000-0x0000000008206000-memory.dmp

Filesize
1.6MB

Download
memory/2464-139-0x0000000004F30000-0x0000000004F40000-memory.dmp

Filesize
64KB

Download
memory/2464-140-0x0000000006AC0000-0x0000000006B5C000-memory.dmp

Filesize
624KB

Download
memory/2464-133-0x0000000000410000-0x000000000055A000-memory.dmp

Filesize
1.3MB

Download
memory/2548-192-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-184-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-209-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-208-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-207-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-206-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-205-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-162-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-164-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-165-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-167-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-168-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-169-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-170-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-171-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-174-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-175-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-176-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-177-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-178-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-179-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-180-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-181-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-182-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-183-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-204-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-185-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-186-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-187-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-188-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-189-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-190-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-191-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-203-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-193-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-194-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-195-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-196-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-197-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-198-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-199-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-200-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-201-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2548-202-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/3984-141-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/3984-146-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/3984-143-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/3984-157-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/3984-144-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/4404-159-0x00000000048C0000-0x00000000048D0000-memory.dmp

Filesize
64KB

Download
memory/4404-158-0x00000000048C0000-0x00000000048D0000-memory.dmp

Filesize
64KB

Download