remcos | ad57def386afddee671b7259046c88da4e51150af32afae55433ca43b52d17d5

Analysis

max time kernel
149s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
24/10/2022, 18:25

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General

Target
IMG-02.exe
Size 6KB
Sample221024-w2ngwaaadr
SHA256 ad57def386afddee671b7259046c88da4e51150af32afae55433ca43b52d17d5
MD5 926d268a424718eab953e5ba1aef435e
SHA1 ecef286dad2339c124b45db8557e652f77a1942d
SHA512 0d6e67dec5041e36d2a2381a99ceca1bcd3a2f443c16d0ea33510813d104ddd2b3239c7ea8938521a0fd0799405cdc220a60dfdea4a13412942ece79dbc58a3d
SSDEEP 96:o1kpDfNm8DpI5/sxpxCvs4ajS5n0pwbFnU:o1kh1m8DpItsDQvs4a+mX
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos remote persistence rat

Malware Config

Extracted

Family

remcos

Botnet

Remote

79.110.62.46:50499

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
Remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
windowss
mouse_option
false
mutex
fg4wer4s5trgfqewdc-WR9LLO
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
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-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	IMG-02.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Bsbufwhcv = "\"C:\\Users\\Admin\\AppData\\Roaming\\Lqnbbcwo\\Bsbufwhcv.exe\""	IMG-02.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1944 set thread context of 1240	1944	IMG-02.exe	92

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 4 IoCs

pid	Process
5032	powershell.exe
5032	powershell.exe
1944	IMG-02.exe
1944	IMG-02.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1944	IMG-02.exe
Token: SeDebugPrivilege	5032	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1240	IMG-02.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 1944 wrote to memory of 5032	1944	IMG-02.exe	82
PID 1944 wrote to memory of 5032	1944	IMG-02.exe	82
PID 1944 wrote to memory of 5032	1944	IMG-02.exe	82
PID 1944 wrote to memory of 544	1944	IMG-02.exe	91
PID 1944 wrote to memory of 544	1944	IMG-02.exe	91
PID 1944 wrote to memory of 544	1944	IMG-02.exe	91
PID 1944 wrote to memory of 1240	1944	IMG-02.exe	92
PID 1944 wrote to memory of 1240	1944	IMG-02.exe	92
PID 1944 wrote to memory of 1240	1944	IMG-02.exe	92
PID 1944 wrote to memory of 1240	1944	IMG-02.exe	92
PID 1944 wrote to memory of 1240	1944	IMG-02.exe	92
PID 1944 wrote to memory of 1240	1944	IMG-02.exe	92
PID 1944 wrote to memory of 1240	1944	IMG-02.exe	92
PID 1944 wrote to memory of 1240	1944	IMG-02.exe	92
PID 1944 wrote to memory of 1240	1944	IMG-02.exe	92
PID 1944 wrote to memory of 1240	1944	IMG-02.exe	92
PID 1944 wrote to memory of 1240	1944	IMG-02.exe	92
PID 1944 wrote to memory of 1240	1944	IMG-02.exe	92

C:\Users\Admin\AppData\Local\Temp\IMG-02.exe
"C:\Users\Admin\AppData\Local\Temp\IMG-02.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1944
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAANQAwAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5032
- C:\Users\Admin\AppData\Local\Temp\IMG-02.exe
  C:\Users\Admin\AppData\Local\Temp\IMG-02.exe
  2⤵
  PID:544
- C:\Users\Admin\AppData\Local\Temp\IMG-02.exe
  C:\Users\Admin\AppData\Local\Temp\IMG-02.exe
  2⤵
  - Suspicious use of SetWindowsHookEx
  PID:1240

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

memory/1240-150-0x0000000000400000-0x000000000047F000-memory.dmp

Download

memory/1240-149-0x0000000000400000-0x000000000047F000-memory.dmp

Download

memory/1240-148-0x0000000000400000-0x000000000047F000-memory.dmp

Download

memory/1240-147-0x0000000000400000-0x000000000047F000-memory.dmp

Download

memory/1240-146-0x0000000000400000-0x000000000047F000-memory.dmp

Download

memory/1944-143-0x000000002A570000-0x000000002AB14000-memory.dmp

Download

memory/1944-133-0x00000000060B0000-0x00000000060D2000-memory.dmp

Download

memory/1944-132-0x0000000000990000-0x0000000000998000-memory.dmp

Download

memory/1944-142-0x00000000069B0000-0x0000000006A42000-memory.dmp

Download

memory/5032-136-0x0000000004C70000-0x0000000005298000-memory.dmp

Download

memory/5032-141-0x0000000005FD0000-0x0000000005FEA000-memory.dmp

Download

memory/5032-140-0x0000000007360000-0x00000000079DA000-memory.dmp

Download

memory/5032-139-0x0000000005AE0000-0x0000000005AFE000-memory.dmp

Download

memory/5032-138-0x0000000005490000-0x00000000054F6000-memory.dmp

Download

memory/5032-137-0x0000000005320000-0x0000000005386000-memory.dmp

Download

memory/5032-135-0x0000000002570000-0x00000000025A6000-memory.dmp

Download