remcos | 2d98fa5fb5c49ffd4e707abaa28f5a4774ba6bd19f617e66bf837d649a75cc2d

General

Target
2afc294bfe44bfad3183cc2d66ac1cf1.exe
Size 469KB
Sample220913-xe8d7sgdc4
SHA256 2d98fa5fb5c49ffd4e707abaa28f5a4774ba6bd19f617e66bf837d649a75cc2d
MD5 2afc294bfe44bfad3183cc2d66ac1cf1
SHA1 ac6950adc0a75d2db19e5b69accff66d1d4bea39
SHA512 05356df90aaff7ef576204464844c6171c6aa28105ac874defc3a06d1472087a6bdf0c91d1574e3fb95b9283aa52237816724a7d1508746c899b3d1edede7fb1
SSDEEP 12288:Wmnk7iLJbpIpiRL6I2WhSKQ9ZsfZQSazn9:uiLJbpI7I2WhQqZ7E9
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos go_nreturn persistence rat

Malware Config

Extracted

Family

remcos

Botnet

Go_NReturn

C2

sallyfosterjones.com:5230

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
msword.exe
copy_folder
office
delete_file
false
hide_file
true
hide_keylog_file
true
install_flag
true
keylog_crypt
true
keylog_file
reader.dat
keylog_flag
false
keylog_folder
office365
mouse_option
false
mutex
dgx-SFYQB6
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
reader
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 1 IoCs

pid	Process
2624	msword.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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	2afc294bfe44bfad3183cc2d66ac1cf1.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	WScript.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows\CurrentVersion\Run\	2afc294bfe44bfad3183cc2d66ac1cf1.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\reader = "\"C:\\ProgramData\\office\\msword.exe\""	2afc294bfe44bfad3183cc2d66ac1cf1.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows\CurrentVersion\Run\	msword.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\reader = "\"C:\\ProgramData\\office\\msword.exe\""	msword.exe

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-1-5-21-2295526160-1155304984-640977766-1000_Classes\Local Settings	2afc294bfe44bfad3183cc2d66ac1cf1.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2624	msword.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3796 wrote to memory of 4576	3796	2afc294bfe44bfad3183cc2d66ac1cf1.exe	84
PID 3796 wrote to memory of 4576	3796	2afc294bfe44bfad3183cc2d66ac1cf1.exe	84
PID 3796 wrote to memory of 4576	3796	2afc294bfe44bfad3183cc2d66ac1cf1.exe	84
PID 4576 wrote to memory of 1448	4576	WScript.exe	85
PID 4576 wrote to memory of 1448	4576	WScript.exe	85
PID 4576 wrote to memory of 1448	4576	WScript.exe	85
PID 1448 wrote to memory of 2624	1448	cmd.exe	87
PID 1448 wrote to memory of 2624	1448	cmd.exe	87
PID 1448 wrote to memory of 2624	1448	cmd.exe	87

C:\Users\Admin\AppData\Local\Temp\2afc294bfe44bfad3183cc2d66ac1cf1.exe
"C:\Users\Admin\AppData\Local\Temp\2afc294bfe44bfad3183cc2d66ac1cf1.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:3796
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
  2⤵
  - Checks computer location settings
  - Suspicious use of WriteProcessMemory
  PID:4576
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c "C:\ProgramData\office\msword.exe"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1448
  - - C:\ProgramData\office\msword.exe
      C:\ProgramData\office\msword.exe
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Suspicious use of SetWindowsHookEx
      PID:2624

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

msword.exe

Path C:\ProgramData\office\msword.exe
Size 469KB
SHA256 2d98fa5fb5c49ffd4e707abaa28f5a4774ba6bd19f617e66bf837d649a75cc2d
MD5 2afc294bfe44bfad3183cc2d66ac1cf1
SHA1 ac6950adc0a75d2db19e5b69accff66d1d4bea39
SHA512 05356df90aaff7ef576204464844c6171c6aa28105ac874defc3a06d1472087a6bdf0c91d1574e3fb95b9283aa52237816724a7d1508746c899b3d1edede7fb1
SSDEEP 12288:Wmnk7iLJbpIpiRL6I2WhSKQ9ZsfZQSazn9:uiLJbpI7I2WhQqZ7E9
MD5 SHA1 SHA512 SSDEEP

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msword.exe

Path C:\ProgramData\office\msword.exe
Size 469KB
SHA256 2d98fa5fb5c49ffd4e707abaa28f5a4774ba6bd19f617e66bf837d649a75cc2d
MD5 2afc294bfe44bfad3183cc2d66ac1cf1
SHA1 ac6950adc0a75d2db19e5b69accff66d1d4bea39
SHA512 05356df90aaff7ef576204464844c6171c6aa28105ac874defc3a06d1472087a6bdf0c91d1574e3fb95b9283aa52237816724a7d1508746c899b3d1edede7fb1
SSDEEP 12288:Wmnk7iLJbpIpiRL6I2WhSKQ9ZsfZQSazn9:uiLJbpI7I2WhQqZ7E9
MD5 SHA1 SHA512 SSDEEP

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install.vbs

Path C:\Users\Admin\AppData\Local\Temp\install.vbs
Size 386B
SHA256 79ff74643766ed18a380a0f528f6796313a1b91f8b37f66fae6476981e7ffd8f
MD5 6497d9d4469444db4076ca156a1c589b
SHA1 ea524bee19742e3eb9fbba0dce8a4f6be928f3b1
SHA512 4aeefa6e15f98fed93071b76544e0b873b7dd863b5bcdfefd6d287485f9e8bae4ebe39312ac0e0ba32b905bd0d31e029ebf234144674fe69ce875b25ad41a119
MD5 SHA1 SHA512

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads