remcos | a1098873c94184cf24edd24c3883f4be52224575da34f0469ad4a525c852ef28

General

Target

rc.exe
Size

985KB
MD5

0e5c23d14dc6448fff9ee7fe356cee81
SHA1

fae0a0acbf6e174b22d3fe0ff6cfe332a462b33b
SHA256

a1098873c94184cf24edd24c3883f4be52224575da34f0469ad4a525c852ef28
SHA512

6363c36750aa00e9f521d402f10f37745bd0f8a4ab2cfddbf342bce7743b8a853016e2afc58982f719d316d73fe255841276966a508eb3ccb7ce83733ff12b03

Score

10^/10

remcos 06192022 persistence rat

Malware Config

Extracted

Family

remcos

Botnet

06192022

C2

nikahuve.ac.ug:6968

kalskala.ac.ug:6968

tuekisaa.ac.ug:6968

parthaha.ac.ug:6968

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
true
install_flag
false
install_path
%AppData%
keylog_crypt
true
keylog_file
scxs.dat
keylog_flag
false
keylog_folder
forbas
keylog_path
%AppData%
mouse_option
false
mutex
cvxyttydfsgbghfgfhtd-RXTSAM
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
notepad;solitaire;

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

Processes:

rc.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Control Panel\International\Geo\Nation rc.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Control Panel\International\Geo\Nation	rc.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

rc.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows\CurrentVersion\Run\winost = "\"C:\\Users\\Admin\\AppData\\Roaming\\winost.exe\""	rc.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

rc.exe

description pid process target process

PID 1800 set thread context of 776 1800 rc.exe MSBuild.exe
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

Processes:

powershell.exerc.exe

pid process

1516 powershell.exe
1800 rc.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

rc.exepowershell.exe

description pid process

Token: SeDebugPrivilege 1800 rc.exe
Token: SeDebugPrivilege 1516 powershell.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

MSBuild.exe

pid process

776 MSBuild.exe

description	pid	process	target process
PID 1800 set thread context of 776	1800	rc.exe	MSBuild.exe

pid	process
1516	powershell.exe
1800	rc.exe

description	pid	process
Token: SeDebugPrivilege	1800	rc.exe
Token: SeDebugPrivilege	1516	powershell.exe

pid	process
776	MSBuild.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

rc.exe

description	pid	process	target process
PID 1800 wrote to memory of 1516	1800	rc.exe	powershell.exe
PID 1800 wrote to memory of 1516	1800	rc.exe	powershell.exe
PID 1800 wrote to memory of 1516	1800	rc.exe	powershell.exe
PID 1800 wrote to memory of 1516	1800	rc.exe	powershell.exe
PID 1800 wrote to memory of 776	1800	rc.exe	MSBuild.exe
PID 1800 wrote to memory of 776	1800	rc.exe	MSBuild.exe
PID 1800 wrote to memory of 776	1800	rc.exe	MSBuild.exe
PID 1800 wrote to memory of 776	1800	rc.exe	MSBuild.exe
PID 1800 wrote to memory of 776	1800	rc.exe	MSBuild.exe
PID 1800 wrote to memory of 776	1800	rc.exe	MSBuild.exe
PID 1800 wrote to memory of 776	1800	rc.exe	MSBuild.exe
PID 1800 wrote to memory of 776	1800	rc.exe	MSBuild.exe
PID 1800 wrote to memory of 776	1800	rc.exe	MSBuild.exe
PID 1800 wrote to memory of 776	1800	rc.exe	MSBuild.exe
PID 1800 wrote to memory of 776	1800	rc.exe	MSBuild.exe
PID 1800 wrote to memory of 776	1800	rc.exe	MSBuild.exe
PID 1800 wrote to memory of 776	1800	rc.exe	MSBuild.exe

C:\Users\Admin\AppData\Local\Temp\rc.exe
"C:\Users\Admin\AppData\Local\Temp\rc.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:1800

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAAMQAwADsAIABTAGUAdAAtAE0AcABQAHIAZQBmAGUAcgBlAG4AYwBlACAALQBFAHgAYwBsAHUAcwBpAG8AbgBQAGEAdABoACAAJwBDADoAXAAnAA==
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1516

C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
2⤵
- Suspicious use of SetWindowsHookEx
PID:776

Network

MITRE ATT&CK Matrix ATT&CK 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

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/776-73-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/776-69-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/776-62-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/776-78-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/776-64-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/776-74-0x000000000043133D-mapping.dmp

Download
memory/776-71-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/776-66-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/776-79-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/776-77-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/776-61-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/776-67-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/776-68-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/1516-60-0x000000006FCB0000-0x000000007025B000-memory.dmp

Filesize
5.7MB

Download
memory/1516-59-0x000000006FCB0000-0x000000007025B000-memory.dmp

Filesize
5.7MB

Download
memory/1516-58-0x0000000074E91000-0x0000000074E93000-memory.dmp

Filesize
8KB

Download
memory/1516-57-0x0000000000000000-mapping.dmp

Download
memory/1800-55-0x0000000004E60000-0x0000000004F58000-memory.dmp

Filesize
992KB

Download
memory/1800-54-0x0000000000A00000-0x0000000000AFC000-memory.dmp

Filesize
1008KB

Download
memory/1800-56-0x0000000000C90000-0x0000000000CDC000-memory.dmp

Filesize
304KB

Download

Analysis

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