remcos | d9ffd67ad75d4b6da3019385c5808015b3acffb17ebde0e93ac5b61d73e8f7ea

Analysis

max time kernel
148s
max time network
150s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
08-09-2024 17:35

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General

Target

d4e5cc4d674e1b44445132f27baa30b2_JaffaCakes118.exe
Size

1.4MB
MD5

d4e5cc4d674e1b44445132f27baa30b2
SHA1

819ad204fb8679ec076392bfb78458440e465239
SHA256

d9ffd67ad75d4b6da3019385c5808015b3acffb17ebde0e93ac5b61d73e8f7ea
SHA512

803752e00d6e9e72f321a7370cb01c4819516fe7629512d1f03ae818f5481392ecc3078cedb034c059ddc9c04fe91b47a0812323eff839607e3f3f8fdab518f5
SSDEEP

24576:ACdxte/80jYLT3U1jfsWavDf9YisNzHgrXXClonevENkEpdQ:pw80cTsjkWav79zMLgrXSlo6E0

Score

10^/10

remcos remotehost discovery rat upx

Malware Config

Extracted

Family

remcos

Version

2.0.7 Pro

Botnet

RemoteHost

162.241.190.159:1256

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
remcos.exe
copy_folder
remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
Remcos-2L8FEE
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

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/2328-2-0x0000000000400000-0x0000000000424000-memory.dmp	upx
behavioral1/memory/2328-10-0x0000000000400000-0x0000000000424000-memory.dmp	upx
behavioral1/memory/2328-9-0x0000000000400000-0x0000000000424000-memory.dmp	upx
behavioral1/memory/2328-11-0x0000000000400000-0x0000000000424000-memory.dmp	upx

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2488 set thread context of 2328	2488	d4e5cc4d674e1b44445132f27baa30b2_JaffaCakes118.exe	31

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d4e5cc4d674e1b44445132f27baa30b2_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2488 wrote to memory of 2328	2488	d4e5cc4d674e1b44445132f27baa30b2_JaffaCakes118.exe	31
PID 2488 wrote to memory of 2328	2488	d4e5cc4d674e1b44445132f27baa30b2_JaffaCakes118.exe	31
PID 2488 wrote to memory of 2328	2488	d4e5cc4d674e1b44445132f27baa30b2_JaffaCakes118.exe	31
PID 2488 wrote to memory of 2328	2488	d4e5cc4d674e1b44445132f27baa30b2_JaffaCakes118.exe	31
PID 2488 wrote to memory of 2328	2488	d4e5cc4d674e1b44445132f27baa30b2_JaffaCakes118.exe	31
PID 2488 wrote to memory of 2328	2488	d4e5cc4d674e1b44445132f27baa30b2_JaffaCakes118.exe	31

C:\Users\Admin\AppData\Local\Temp\d4e5cc4d674e1b44445132f27baa30b2_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\d4e5cc4d674e1b44445132f27baa30b2_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2488
- C:\Windows\SysWOW64\svchost.exe
  "C:\Windows\System32\svchost.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2328

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2328-6-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2328-2-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2328-1-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2328-10-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2328-9-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2328-11-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2488-0-0x0000000000140000-0x0000000000141000-memory.dmp

Filesize
4KB

Download