remcos | 778ad2e8d477b0fc3ba8cbb0e3de025a6f101257c67efeb60f2bc5627996e028

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
10/01/2023, 19:05

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General

Target
2d9b808a09cc50bf8cf027b71bb20d1e.exe
Size 1.0MB
Sample230110-xrjavada21
SHA256 778ad2e8d477b0fc3ba8cbb0e3de025a6f101257c67efeb60f2bc5627996e028
MD5 2d9b808a09cc50bf8cf027b71bb20d1e
SHA1 9a167bfba1a74041f7dd0728b32205a4552e1b5c
SHA512 ae6f618c80d4558098494c787dd85617c24a58c7389d33aa00314b82c35643d3ebf819d3cad1ac055d3f5cc33ac37c9ec7e6eb34dbacd9f6855c6cd240138ccc
SSDEEP 24576:HIO/padyi/u8dCLF0XA82KwJEO7yeJqNuilb7qEZV/NWCsgfzG:Bpa/td9Xp2KwJEOwNtqEZVugf
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos mekino-remotehost persistence rat

Malware Config

Extracted

Family

remcos

Botnet

Mekino-RemoteHost

nadiac7806.hopto.org:2397

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
los.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
keylog_path
%AppData%
mouse_option
false
mutex
Rmc-XBQXEL
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
trn
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
4132	los.exe
3216	los.exe

Checks computer location settings 2 TTPs 2 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	2d9b808a09cc50bf8cf027b71bb20d1e.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	WScript.exe

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\trn = "\"C:\\Users\\Admin\\AppData\\Roaming\\los.exe\""	los.exe
Key created	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Windows\CurrentVersion\Run\	2d9b808a09cc50bf8cf027b71bb20d1e.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\trn = "\"C:\\Users\\Admin\\AppData\\Roaming\\los.exe\""	2d9b808a09cc50bf8cf027b71bb20d1e.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	2d9b808a09cc50bf8cf027b71bb20d1e.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\trn = "\"C:\\Users\\Admin\\AppData\\Roaming\\los.exe\""	2d9b808a09cc50bf8cf027b71bb20d1e.exe
Key created	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Windows\CurrentVersion\Run\	los.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\trn = "\"C:\\Users\\Admin\\AppData\\Roaming\\los.exe\""	los.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	los.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4844 set thread context of 1976	4844	2d9b808a09cc50bf8cf027b71bb20d1e.exe	91
PID 4132 set thread context of 3216	4132	los.exe	96

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000_Classes\Local Settings	2d9b808a09cc50bf8cf027b71bb20d1e.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3216	los.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 4844 wrote to memory of 1976	4844	2d9b808a09cc50bf8cf027b71bb20d1e.exe	91
PID 4844 wrote to memory of 1976	4844	2d9b808a09cc50bf8cf027b71bb20d1e.exe	91
PID 4844 wrote to memory of 1976	4844	2d9b808a09cc50bf8cf027b71bb20d1e.exe	91
PID 4844 wrote to memory of 1976	4844	2d9b808a09cc50bf8cf027b71bb20d1e.exe	91
PID 4844 wrote to memory of 1976	4844	2d9b808a09cc50bf8cf027b71bb20d1e.exe	91
PID 4844 wrote to memory of 1976	4844	2d9b808a09cc50bf8cf027b71bb20d1e.exe	91
PID 4844 wrote to memory of 1976	4844	2d9b808a09cc50bf8cf027b71bb20d1e.exe	91
PID 4844 wrote to memory of 1976	4844	2d9b808a09cc50bf8cf027b71bb20d1e.exe	91
PID 4844 wrote to memory of 1976	4844	2d9b808a09cc50bf8cf027b71bb20d1e.exe	91
PID 4844 wrote to memory of 1976	4844	2d9b808a09cc50bf8cf027b71bb20d1e.exe	91
PID 4844 wrote to memory of 1976	4844	2d9b808a09cc50bf8cf027b71bb20d1e.exe	91
PID 4844 wrote to memory of 1976	4844	2d9b808a09cc50bf8cf027b71bb20d1e.exe	91
PID 1976 wrote to memory of 4688	1976	2d9b808a09cc50bf8cf027b71bb20d1e.exe	92
PID 1976 wrote to memory of 4688	1976	2d9b808a09cc50bf8cf027b71bb20d1e.exe	92
PID 1976 wrote to memory of 4688	1976	2d9b808a09cc50bf8cf027b71bb20d1e.exe	92
PID 4688 wrote to memory of 1864	4688	WScript.exe	93
PID 4688 wrote to memory of 1864	4688	WScript.exe	93
PID 4688 wrote to memory of 1864	4688	WScript.exe	93
PID 1864 wrote to memory of 4132	1864	cmd.exe	95
PID 1864 wrote to memory of 4132	1864	cmd.exe	95
PID 1864 wrote to memory of 4132	1864	cmd.exe	95
PID 4132 wrote to memory of 3216	4132	los.exe	96
PID 4132 wrote to memory of 3216	4132	los.exe	96
PID 4132 wrote to memory of 3216	4132	los.exe	96
PID 4132 wrote to memory of 3216	4132	los.exe	96
PID 4132 wrote to memory of 3216	4132	los.exe	96
PID 4132 wrote to memory of 3216	4132	los.exe	96
PID 4132 wrote to memory of 3216	4132	los.exe	96
PID 4132 wrote to memory of 3216	4132	los.exe	96
PID 4132 wrote to memory of 3216	4132	los.exe	96
PID 4132 wrote to memory of 3216	4132	los.exe	96
PID 4132 wrote to memory of 3216	4132	los.exe	96
PID 4132 wrote to memory of 3216	4132	los.exe	96

C:\Users\Admin\AppData\Local\Temp\2d9b808a09cc50bf8cf027b71bb20d1e.exe
"C:\Users\Admin\AppData\Local\Temp\2d9b808a09cc50bf8cf027b71bb20d1e.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4844
- C:\Users\Admin\AppData\Local\Temp\2d9b808a09cc50bf8cf027b71bb20d1e.exe
  "C:\Users\Admin\AppData\Local\Temp\2d9b808a09cc50bf8cf027b71bb20d1e.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:1976
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\uvhluebptrsohqhzdoecilrpyqqdzzmws.vbs"
    3⤵
    - Checks computer location settings
    - Suspicious use of WriteProcessMemory
    PID:4688
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\los.exe"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1864
    - - C:\Users\Admin\AppData\Roaming\los.exe
        
        C:\Users\Admin\AppData\Roaming\los.exe
        5⤵
        Executes dropped EXE
        Suspicious use of SetThreadContext
        Suspicious use of WriteProcessMemory
        
        PID:4132
      - C:\Users\Admin\AppData\Roaming\los.exe
        
        "C:\Users\Admin\AppData\Roaming\los.exe"
        6⤵
        Executes dropped EXE
        Adds Run key to start application
        Suspicious use of SetWindowsHookEx
        
        PID:3216

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

uvhluebptrsohqhzdoecilrpyqqdzzmws.vbs

Path C:\Users\Admin\AppData\Local\Temp\uvhluebptrsohqhzdoecilrpyqqdzzmws.vbs
Size 398B
SHA256 65c976c1e229ea7bc352c40862a0b71208b0b6bbe94a74d2ecb14b1fb70fcd3f
MD5 cf758ec06c989323030d19d47fc4dd16
SHA1 3e9f66e79d7c8964e0446f76b163198384bebb24
SHA512 7d4e37e7e8d73a554fff47cf1557cc6c89e816b567fac40019805ac67b11db6f2f635134a30f7dbac11b9733af2caec9e2137fa1e03d588e3adea64adbfa09ea
MD5 SHA1 SHA512

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los.exe

Path C:\Users\Admin\AppData\Roaming\los.exe
Size 1.0MB
SHA256 778ad2e8d477b0fc3ba8cbb0e3de025a6f101257c67efeb60f2bc5627996e028
MD5 2d9b808a09cc50bf8cf027b71bb20d1e
SHA1 9a167bfba1a74041f7dd0728b32205a4552e1b5c
SHA512 ae6f618c80d4558098494c787dd85617c24a58c7389d33aa00314b82c35643d3ebf819d3cad1ac055d3f5cc33ac37c9ec7e6eb34dbacd9f6855c6cd240138ccc
SSDEEP 24576:HIO/padyi/u8dCLF0XA82KwJEO7yeJqNuilb7qEZV/NWCsgfzG:Bpa/td9Xp2KwJEOwNtqEZVugf
MD5 SHA1 SHA512 SSDEEP

Submit Download

los.exe

Path C:\Users\Admin\AppData\Roaming\los.exe
Size 1.0MB
SHA256 778ad2e8d477b0fc3ba8cbb0e3de025a6f101257c67efeb60f2bc5627996e028
MD5 2d9b808a09cc50bf8cf027b71bb20d1e
SHA1 9a167bfba1a74041f7dd0728b32205a4552e1b5c
SHA512 ae6f618c80d4558098494c787dd85617c24a58c7389d33aa00314b82c35643d3ebf819d3cad1ac055d3f5cc33ac37c9ec7e6eb34dbacd9f6855c6cd240138ccc
SSDEEP 24576:HIO/padyi/u8dCLF0XA82KwJEO7yeJqNuilb7qEZV/NWCsgfzG:Bpa/td9Xp2KwJEOwNtqEZVugf
MD5 SHA1 SHA512 SSDEEP

Submit Download

los.exe

Path C:\Users\Admin\AppData\Roaming\los.exe
Size 1.0MB
SHA256 778ad2e8d477b0fc3ba8cbb0e3de025a6f101257c67efeb60f2bc5627996e028
MD5 2d9b808a09cc50bf8cf027b71bb20d1e
SHA1 9a167bfba1a74041f7dd0728b32205a4552e1b5c
SHA512 ae6f618c80d4558098494c787dd85617c24a58c7389d33aa00314b82c35643d3ebf819d3cad1ac055d3f5cc33ac37c9ec7e6eb34dbacd9f6855c6cd240138ccc
SSDEEP 24576:HIO/padyi/u8dCLF0XA82KwJEO7yeJqNuilb7qEZV/NWCsgfzG:Bpa/td9Xp2KwJEOwNtqEZVugf
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1976-142-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/1976-139-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/1976-140-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/1976-138-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/3216-151-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/3216-152-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/3216-153-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/3216-154-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/4844-132-0x00000000005C0000-0x00000000006C6000-memory.dmp

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memory/4844-136-0x0000000007860000-0x00000000078FC000-memory.dmp

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memory/4844-135-0x0000000005080000-0x000000000508A000-memory.dmp

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memory/4844-134-0x0000000005110000-0x00000000051A2000-memory.dmp

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memory/4844-133-0x0000000005620000-0x0000000005BC4000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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