remcos | f4085209b3190363b6f4cb1ac45ae0f2bfd2e062a065feedb2a82f055a0f1c27

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
submitted
27/06/2022, 16:17

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General

Target
6fe87911b3e829cc95f4d7eaa916ae27.exe
Size 739KB
Sample220627-trclhsccgr
SHA256 f4085209b3190363b6f4cb1ac45ae0f2bfd2e062a065feedb2a82f055a0f1c27
MD5 6fe87911b3e829cc95f4d7eaa916ae27
SHA1 c5eb02bc6ee09a85312519d7cf5f9e544d58f496
SHA512 999073d3551ad868c891e5a07ed820dcd8ed140280a03d73c90369294a0e4041e393919d8c2e20bd5d1d44812c30c4a937c7f2e5c27f997d6c37a4c7c7bb9972
MD5 SHA1 SHA512

Score

10^/10

remcos ip persistence rat

Malware Config

Extracted

Family

remcos

Botnet

imranmhemoodcheema.ddns.net:8903

Attributes

audio_folder
MicRecords
audio_path
%AppData%
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
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
Remcos-0ITHAO
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
take_screenshot_title

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-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	6fe87911b3e829cc95f4d7eaa916ae27.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-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Xpwdyded = "\"C:\\Users\\Admin\\AppData\\Roaming\\Nrxtmqz\\Xpwdyded.exe\""	6fe87911b3e829cc95f4d7eaa916ae27.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1752 set thread context of 4208	1752	6fe87911b3e829cc95f4d7eaa916ae27.exe	89

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
1352	powershell.exe
1352	powershell.exe
1752	6fe87911b3e829cc95f4d7eaa916ae27.exe
1752	6fe87911b3e829cc95f4d7eaa916ae27.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1352	powershell.exe
Token: SeDebugPrivilege	1752	6fe87911b3e829cc95f4d7eaa916ae27.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4208	InstallUtil.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1752 wrote to memory of 1352	1752	6fe87911b3e829cc95f4d7eaa916ae27.exe	81
PID 1752 wrote to memory of 1352	1752	6fe87911b3e829cc95f4d7eaa916ae27.exe	81
PID 1752 wrote to memory of 1352	1752	6fe87911b3e829cc95f4d7eaa916ae27.exe	81
PID 1752 wrote to memory of 4208	1752	6fe87911b3e829cc95f4d7eaa916ae27.exe	89
PID 1752 wrote to memory of 4208	1752	6fe87911b3e829cc95f4d7eaa916ae27.exe	89
PID 1752 wrote to memory of 4208	1752	6fe87911b3e829cc95f4d7eaa916ae27.exe	89
PID 1752 wrote to memory of 4208	1752	6fe87911b3e829cc95f4d7eaa916ae27.exe	89
PID 1752 wrote to memory of 4208	1752	6fe87911b3e829cc95f4d7eaa916ae27.exe	89
PID 1752 wrote to memory of 4208	1752	6fe87911b3e829cc95f4d7eaa916ae27.exe	89
PID 1752 wrote to memory of 4208	1752	6fe87911b3e829cc95f4d7eaa916ae27.exe	89
PID 1752 wrote to memory of 4208	1752	6fe87911b3e829cc95f4d7eaa916ae27.exe	89
PID 1752 wrote to memory of 4208	1752	6fe87911b3e829cc95f4d7eaa916ae27.exe	89
PID 1752 wrote to memory of 4208	1752	6fe87911b3e829cc95f4d7eaa916ae27.exe	89
PID 1752 wrote to memory of 4208	1752	6fe87911b3e829cc95f4d7eaa916ae27.exe	89
PID 1752 wrote to memory of 4208	1752	6fe87911b3e829cc95f4d7eaa916ae27.exe	89

C:\Users\Admin\AppData\Local\Temp\6fe87911b3e829cc95f4d7eaa916ae27.exe
"C:\Users\Admin\AppData\Local\Temp\6fe87911b3e829cc95f4d7eaa916ae27.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:1752
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAAMgAwAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1352
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  2⤵
  - Suspicious use of SetWindowsHookEx
  PID:4208

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

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Downloads

memory/1352-138-0x0000000004F80000-0x0000000004FE6000-memory.dmp

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memory/1352-140-0x0000000005DA0000-0x0000000005DBE000-memory.dmp

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memory/1352-142-0x00000000062B0000-0x00000000062CA000-memory.dmp

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memory/1352-139-0x0000000005750000-0x00000000057B6000-memory.dmp

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memory/1352-135-0x00000000027F0000-0x0000000002826000-memory.dmp

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memory/1352-136-0x0000000005030000-0x0000000005658000-memory.dmp

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memory/1352-137-0x0000000004EE0000-0x0000000004F02000-memory.dmp

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memory/1352-141-0x0000000007600000-0x0000000007C7A000-memory.dmp

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memory/1752-130-0x0000000000730000-0x00000000007EE000-memory.dmp

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memory/1752-133-0x0000000005040000-0x000000000504A000-memory.dmp

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memory/1752-131-0x0000000005690000-0x0000000005C34000-memory.dmp

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memory/1752-132-0x00000000050E0000-0x0000000005172000-memory.dmp

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memory/4208-144-0x0000000000400000-0x000000000047B000-memory.dmp

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memory/4208-145-0x0000000000400000-0x000000000047B000-memory.dmp

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memory/4208-146-0x0000000000400000-0x000000000047B000-memory.dmp

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memory/4208-147-0x0000000000400000-0x000000000047B000-memory.dmp

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memory/4208-148-0x0000000000400000-0x000000000047B000-memory.dmp

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