remcos | 510dab7c88b5947a7c409630e76c54fa12470586dc79c9f69364d73f1bf30678

General

Target

software-update.exe
Size

14KB
MD5

828e5b964cc27a496bac981014125eef
SHA1

dcffba869a1cc82dc1a5aae275bb2e97b6a51e22
SHA256

510dab7c88b5947a7c409630e76c54fa12470586dc79c9f69364d73f1bf30678
SHA512

040321ca0b41615e18f253a46a7c2fb5ffde6791cdc0de4b687a674381d7e129999334352dcc580866156adae0c5f95679b923bce940547988539c6ef5e0bf17
SSDEEP

384:mVD2qHu5tBT1L+tyo0C+DGoYXVlSqKHb:mVyqHibJ+tyo0C+N6Vfa

Score

10^/10

remcos thorami persistence rat

Malware Config

Extracted

Family

remcos

Botnet

thorami

C2

thorami.duckdns.org:2404

80.76.51.46:2404

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
hrtranp.exe
delete_file
false
hide_file
true
hide_keylog_file
true
install_flag
false
install_path
%AppData%
keylog_crypt
false
keylog_file
hjpbvkl.dat
keylog_flag
false
keylog_path
%AppData%
mouse_option
false
mutex
hdgnoftngtha-KQESCC
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
djureko
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-1-5-21-2971393436-602173351-1645505021-1000\Control Panel\International\Geo\Nation	software-update.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-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\DriverHelp = "\"C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\DriverHelp.exe\""	software-update.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2028 set thread context of 3844	2028	software-update.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
3220	powershell.exe
3220	powershell.exe
1996	powershell.exe
1996	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2028	software-update.exe
Token: SeDebugPrivilege	3220	powershell.exe
Token: SeDebugPrivilege	1996	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3844	RegAsm.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2028 wrote to memory of 3220	2028	software-update.exe	87
PID 2028 wrote to memory of 3220	2028	software-update.exe	87
PID 2028 wrote to memory of 3220	2028	software-update.exe	87
PID 2028 wrote to memory of 4984	2028	software-update.exe	89
PID 2028 wrote to memory of 4984	2028	software-update.exe	89
PID 2028 wrote to memory of 4984	2028	software-update.exe	89
PID 4984 wrote to memory of 1996	4984	cmd.exe	91
PID 4984 wrote to memory of 1996	4984	cmd.exe	91
PID 4984 wrote to memory of 1996	4984	cmd.exe	91
PID 2028 wrote to memory of 3844	2028	software-update.exe	92
PID 2028 wrote to memory of 3844	2028	software-update.exe	92
PID 2028 wrote to memory of 3844	2028	software-update.exe	92
PID 2028 wrote to memory of 3844	2028	software-update.exe	92
PID 2028 wrote to memory of 3844	2028	software-update.exe	92
PID 2028 wrote to memory of 3844	2028	software-update.exe	92
PID 2028 wrote to memory of 3844	2028	software-update.exe	92
PID 2028 wrote to memory of 3844	2028	software-update.exe	92
PID 2028 wrote to memory of 3844	2028	software-update.exe	92
PID 2028 wrote to memory of 3844	2028	software-update.exe	92
PID 2028 wrote to memory of 3844	2028	software-update.exe	92
PID 2028 wrote to memory of 3844	2028	software-update.exe	92

C:\Users\Admin\AppData\Local\Temp\software-update.exe
"C:\Users\Admin\AppData\Local\Temp\software-update.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2028
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3220
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c powershell -ENC cwBlAHQALQBtAHAAcAByAGUAZgBlAHIAZQBuAGMAZQAgAC0AZQB4AGMAbAB1AHMAaQBvAG4AcABhAHQAaAAgAEMAOgBcAA==
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4984
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell -ENC cwBlAHQALQBtAHAAcAByAGUAZgBlAHIAZQBuAGMAZQAgAC0AZQB4AGMAbAB1AHMAaQBvAG4AcABhAHQAaAAgAEMAOgBcAA==
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1996
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  2⤵
  - Suspicious use of SetWindowsHookEx
  PID:3844

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

Filesize
1KB

MD5
6195a91754effb4df74dbc72cdf4f7a6

SHA1
aba262f5726c6d77659fe0d3195e36a85046b427

SHA256
3254495a5513b37a2686a876d0040275414699e7ce760e7b5ee05e41a54b96f5

SHA512
ed723d15de267390dc93263538428e2c881be3494c996a810616b470d6df7d5acfcc8725687d5c50319ebef45caef44f769bfc32e0dc3abd249dacff4a12cc89

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\ModuleAnalysisCache

Filesize
53KB

MD5
06ad34f9739c5159b4d92d702545bd49

SHA1
9152a0d4f153f3f40f7e606be75f81b582ee0c17

SHA256
474813b625f00710f29fa3b488235a6a22201851efb336bddf60d7d24a66bfba

SHA512
c272cd28ae164d465b779163ba9eca6a28261376414c6bbdfbd9f2128adb7f7ff1420e536b4d6000d0301ded2ec9036bc5c657588458bff41f176bdce8d74f92

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
16KB

MD5
c82ad9c6734f7b0d07c76376a6d4b363

SHA1
2c29fe6f44f517bfd2a5f48608b15d91434ba0a8

SHA256
d03b968312ce83ce2faa70e480bf062001c9803817c8d3c15f9e79cdc06d44f3

SHA512
8d82a7b7a7d018a24ced2781117dd1458eac92cb65887ddee85340adb82d727aacb147e2aad4470bce02704f02747eaee48b142c737f39f0ae56aea1c32f7337

Download Submit
memory/1996-157-0x0000000006E30000-0x0000000006E62000-memory.dmp

Filesize
200KB

Download
memory/1996-163-0x00000000066B0000-0x00000000066BE000-memory.dmp

Filesize
56KB

Download
memory/1996-165-0x0000000007D60000-0x0000000007D68000-memory.dmp

Filesize
32KB

Download
memory/1996-148-0x0000000000000000-mapping.dmp

Download
memory/1996-158-0x000000006FB50000-0x000000006FB9C000-memory.dmp

Filesize
304KB

Download
memory/1996-161-0x0000000007BE0000-0x0000000007BEA000-memory.dmp

Filesize
40KB

Download
memory/1996-160-0x0000000006E10000-0x0000000006E2E000-memory.dmp

Filesize
120KB

Download
memory/1996-164-0x0000000007D80000-0x0000000007D9A000-memory.dmp

Filesize
104KB

Download
memory/1996-162-0x0000000007E20000-0x0000000007EB6000-memory.dmp

Filesize
600KB

Download
memory/2028-133-0x0000000005300000-0x00000000058A4000-memory.dmp

Filesize
5.6MB

Download
memory/2028-136-0x00000000062D0000-0x0000000006320000-memory.dmp

Filesize
320KB

Download
memory/2028-132-0x0000000000450000-0x000000000045A000-memory.dmp

Filesize
40KB

Download
memory/2028-134-0x0000000004D50000-0x0000000004DE2000-memory.dmp

Filesize
584KB

Download
memory/2028-138-0x0000000006940000-0x0000000006962000-memory.dmp

Filesize
136KB

Download
memory/2028-137-0x0000000006530000-0x00000000065E2000-memory.dmp

Filesize
712KB

Download
memory/2028-135-0x0000000004CC0000-0x0000000004CCA000-memory.dmp

Filesize
40KB

Download
memory/3220-141-0x0000000005BB0000-0x00000000061D8000-memory.dmp

Filesize
6.2MB

Download
memory/3220-146-0x0000000006E30000-0x0000000006E4A000-memory.dmp

Filesize
104KB

Download
memory/3220-145-0x0000000008220000-0x000000000889A000-memory.dmp

Filesize
6.5MB

Download
memory/3220-144-0x0000000006980000-0x000000000699E000-memory.dmp

Filesize
120KB

Download
memory/3220-143-0x0000000006360000-0x00000000063C6000-memory.dmp

Filesize
408KB

Download
memory/3220-142-0x0000000006280000-0x00000000062E6000-memory.dmp

Filesize
408KB

Download
memory/3220-140-0x0000000003390000-0x00000000033C6000-memory.dmp

Filesize
216KB

Download
memory/3220-139-0x0000000000000000-mapping.dmp

Download
memory/3844-166-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3844-159-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3844-154-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3844-153-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3844-152-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3844-151-0x0000000000000000-mapping.dmp

Download
memory/4984-147-0x0000000000000000-mapping.dmp

Download

Analysis

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