remcos | 92b3df4aa0370571672ad69ff4a87619f50acf9c0ebefc6be71ac194f3819e3a

Analysis

max time kernel
148s
max time network
140s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
18-04-2023 07:28

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

tmp.exe
Size

980KB
MD5

7acb95dc474f93e22d0fb06305c0ac7c
SHA1

6647e2383328d7acb254542f1b6a994b31591162
SHA256

92b3df4aa0370571672ad69ff4a87619f50acf9c0ebefc6be71ac194f3819e3a
SHA512

f1820e3ccbb275238b771e4337d3fef1b7ba7d4c15cc5fcfeea71078e36660bf0d91c34f90239f2e32da86d008dd8ce24fcbc0fca900b95b54cc63ecda2eff3e
SSDEEP

24576:jqfcSBgBCL8g2Duwmie2dQS3CHbDMZTWD0VB+hzQQL7x/bb0kt1:OcSBged2Du/XixCvu6of++k

Score

10^/10

remcos 2023 gee host persistence rat

Malware Config

Extracted

Family

remcos

Botnet

2023 gee Host

davidwong4ghost.ddnsking.com:2030

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
wuauclt.exe
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
true
install_path
%AppData%
keylog_crypt
true
keylog_file
logs.dat
keylog_flag
false
keylog_path
%AppData%
mouse_option
false
mutex
Rmc-LLGVGS
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
chrome
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-1-5-21-2275444769-3691835758-4097679484-1000\Control Panel\International\Geo\Nation	tmp.exe

Executes dropped EXE 2 IoCs

pid	Process
3908	wuauclt.exe
2692	wuauclt.exe

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	wuauclt.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\chrome = "\"C:\\Users\\Admin\\AppData\\Roaming\\wuauclt.exe\""	wuauclt.exe
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Windows\CurrentVersion\Run\	tmp.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\chrome = "\"C:\\Users\\Admin\\AppData\\Roaming\\wuauclt.exe\""	tmp.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	tmp.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\chrome = "\"C:\\Users\\Admin\\AppData\\Roaming\\wuauclt.exe\""	tmp.exe
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Windows\CurrentVersion\Run\	wuauclt.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\chrome = "\"C:\\Users\\Admin\\AppData\\Roaming\\wuauclt.exe\""	wuauclt.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 5056 set thread context of 4580	5056	tmp.exe	93
PID 3908 set thread context of 2692	3908	wuauclt.exe	95

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 2 IoCs

pid	Process
5056	tmp.exe
5056	tmp.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5056	tmp.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2692	wuauclt.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 5056 wrote to memory of 4236	5056	tmp.exe	92
PID 5056 wrote to memory of 4236	5056	tmp.exe	92
PID 5056 wrote to memory of 4236	5056	tmp.exe	92
PID 5056 wrote to memory of 4580	5056	tmp.exe	93
PID 5056 wrote to memory of 4580	5056	tmp.exe	93
PID 5056 wrote to memory of 4580	5056	tmp.exe	93
PID 5056 wrote to memory of 4580	5056	tmp.exe	93
PID 5056 wrote to memory of 4580	5056	tmp.exe	93
PID 5056 wrote to memory of 4580	5056	tmp.exe	93
PID 5056 wrote to memory of 4580	5056	tmp.exe	93
PID 5056 wrote to memory of 4580	5056	tmp.exe	93
PID 5056 wrote to memory of 4580	5056	tmp.exe	93
PID 5056 wrote to memory of 4580	5056	tmp.exe	93
PID 5056 wrote to memory of 4580	5056	tmp.exe	93
PID 5056 wrote to memory of 4580	5056	tmp.exe	93
PID 4580 wrote to memory of 3908	4580	tmp.exe	94
PID 4580 wrote to memory of 3908	4580	tmp.exe	94
PID 4580 wrote to memory of 3908	4580	tmp.exe	94
PID 3908 wrote to memory of 2692	3908	wuauclt.exe	95
PID 3908 wrote to memory of 2692	3908	wuauclt.exe	95
PID 3908 wrote to memory of 2692	3908	wuauclt.exe	95
PID 3908 wrote to memory of 2692	3908	wuauclt.exe	95
PID 3908 wrote to memory of 2692	3908	wuauclt.exe	95
PID 3908 wrote to memory of 2692	3908	wuauclt.exe	95
PID 3908 wrote to memory of 2692	3908	wuauclt.exe	95
PID 3908 wrote to memory of 2692	3908	wuauclt.exe	95
PID 3908 wrote to memory of 2692	3908	wuauclt.exe	95
PID 3908 wrote to memory of 2692	3908	wuauclt.exe	95
PID 3908 wrote to memory of 2692	3908	wuauclt.exe	95
PID 3908 wrote to memory of 2692	3908	wuauclt.exe	95

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5056
- C:\Users\Admin\AppData\Local\Temp\tmp.exe
  "C:\Users\Admin\AppData\Local\Temp\tmp.exe"
  2⤵
  PID:4236
- C:\Users\Admin\AppData\Local\Temp\tmp.exe
  "C:\Users\Admin\AppData\Local\Temp\tmp.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:4580
- - C:\Users\Admin\AppData\Roaming\wuauclt.exe
    "C:\Users\Admin\AppData\Roaming\wuauclt.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3908
  - - C:\Users\Admin\AppData\Roaming\wuauclt.exe
      "C:\Users\Admin\AppData\Roaming\wuauclt.exe"
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Suspicious use of SetWindowsHookEx
      PID:2692

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

Loading Replay Monitor...

Downloads

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

Filesize
980KB

MD5
7acb95dc474f93e22d0fb06305c0ac7c

SHA1
6647e2383328d7acb254542f1b6a994b31591162

SHA256
92b3df4aa0370571672ad69ff4a87619f50acf9c0ebefc6be71ac194f3819e3a

SHA512
f1820e3ccbb275238b771e4337d3fef1b7ba7d4c15cc5fcfeea71078e36660bf0d91c34f90239f2e32da86d008dd8ce24fcbc0fca900b95b54cc63ecda2eff3e

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

Filesize
980KB

MD5
7acb95dc474f93e22d0fb06305c0ac7c

SHA1
6647e2383328d7acb254542f1b6a994b31591162

SHA256
92b3df4aa0370571672ad69ff4a87619f50acf9c0ebefc6be71ac194f3819e3a

SHA512
f1820e3ccbb275238b771e4337d3fef1b7ba7d4c15cc5fcfeea71078e36660bf0d91c34f90239f2e32da86d008dd8ce24fcbc0fca900b95b54cc63ecda2eff3e

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

Filesize
980KB

MD5
7acb95dc474f93e22d0fb06305c0ac7c

SHA1
6647e2383328d7acb254542f1b6a994b31591162

SHA256
92b3df4aa0370571672ad69ff4a87619f50acf9c0ebefc6be71ac194f3819e3a

SHA512
f1820e3ccbb275238b771e4337d3fef1b7ba7d4c15cc5fcfeea71078e36660bf0d91c34f90239f2e32da86d008dd8ce24fcbc0fca900b95b54cc63ecda2eff3e

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

Filesize
980KB

MD5
7acb95dc474f93e22d0fb06305c0ac7c

SHA1
6647e2383328d7acb254542f1b6a994b31591162

SHA256
92b3df4aa0370571672ad69ff4a87619f50acf9c0ebefc6be71ac194f3819e3a

SHA512
f1820e3ccbb275238b771e4337d3fef1b7ba7d4c15cc5fcfeea71078e36660bf0d91c34f90239f2e32da86d008dd8ce24fcbc0fca900b95b54cc63ecda2eff3e

Download Submit
memory/2692-177-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2692-163-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2692-171-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2692-172-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2692-170-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2692-169-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2692-168-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2692-176-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2692-178-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2692-179-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2692-167-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2692-166-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2692-164-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2692-180-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2692-161-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/3908-158-0x0000000005B40000-0x0000000005B50000-memory.dmp

Filesize
64KB

Download
memory/3908-157-0x0000000005B40000-0x0000000005B50000-memory.dmp

Filesize
64KB

Download
memory/4580-140-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/4580-156-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/4580-145-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/4580-143-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/4580-142-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/5056-133-0x0000000000690000-0x000000000078C000-memory.dmp

Filesize
1008KB

Download
memory/5056-139-0x0000000006460000-0x00000000064FC000-memory.dmp

Filesize
624KB

Download
memory/5056-138-0x0000000005330000-0x0000000005340000-memory.dmp

Filesize
64KB

Download
memory/5056-137-0x0000000005330000-0x0000000005340000-memory.dmp

Filesize
64KB

Download
memory/5056-136-0x0000000005140000-0x000000000514A000-memory.dmp

Filesize
40KB

Download
memory/5056-135-0x0000000005160000-0x00000000051F2000-memory.dmp

Filesize
584KB

Download
memory/5056-134-0x0000000005710000-0x0000000005CB4000-memory.dmp

Filesize
5.6MB

Download