remcos | a9fc803f335632186421fa99723dcf6025f6dc29c1bc6f2a36ee2d120920a842

General

Target

$PLUGINSDIR/c163.dll
Size

149KB
MD5

ff92e869d01daa3746d2cec2646ad093
SHA1

8550d250841652780bc92379fadf5a39244bc64e
SHA256

af33fde8b5a9f218f92278d6c1c17e91624242262fa65e9a770fb81b14b42bb4
SHA512

9899011426347267a98ca13c5dda0f20a3d9976e33c0be4aa21d4bfc656d094088403bf9cfb6f443efb4b24748b207a6af0f723bebfc7209baff334cdba16cdb
SSDEEP

3072:+xH0psiSorXyEpuxm/RyCcVAO91YaU5UM7eOFB8MrzItMyq/SB59Hnlf:5pHSmpuxm/RyCcVAOsa87/B8agMySArx

Score

10^/10

remcos new discovery rat

Malware Config

Extracted

Family

remcos

Version

2.7.2 Pro

Botnet

NEW

C2

insidelife1.ddns.net:2123

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
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-FXFW4N
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
wikipedia;solitaire;

Signatures

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

Blocklisted process makes network request 14 IoCs

flow	pid	Process
3	1552	rundll32.exe
4	1552	rundll32.exe
5	1552	rundll32.exe
6	1552	rundll32.exe
7	1552	rundll32.exe
8	1552	rundll32.exe
9	1552	rundll32.exe
10	1552	rundll32.exe
11	1552	rundll32.exe
12	1552	rundll32.exe
13	1552	rundll32.exe
14	1552	rundll32.exe
15	1552	rundll32.exe
16	1552	rundll32.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2280 set thread context of 1552	2280	rundll32.exe	32

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	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2280	rundll32.exe
2280	rundll32.exe
2280	rundll32.exe
2280	rundll32.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2280	rundll32.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2256 wrote to memory of 2280	2256	rundll32.exe	31
PID 2256 wrote to memory of 2280	2256	rundll32.exe	31
PID 2256 wrote to memory of 2280	2256	rundll32.exe	31
PID 2256 wrote to memory of 2280	2256	rundll32.exe	31
PID 2256 wrote to memory of 2280	2256	rundll32.exe	31
PID 2256 wrote to memory of 2280	2256	rundll32.exe	31
PID 2256 wrote to memory of 2280	2256	rundll32.exe	31
PID 2280 wrote to memory of 1552	2280	rundll32.exe	32
PID 2280 wrote to memory of 1552	2280	rundll32.exe	32
PID 2280 wrote to memory of 1552	2280	rundll32.exe	32
PID 2280 wrote to memory of 1552	2280	rundll32.exe	32
PID 2280 wrote to memory of 1552	2280	rundll32.exe	32
PID 2280 wrote to memory of 1552	2280	rundll32.exe	32
PID 2280 wrote to memory of 1552	2280	rundll32.exe	32
PID 2280 wrote to memory of 1552	2280	rundll32.exe	32

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\c163.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2256
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\c163.dll,#1
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:2280
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\c163.dll,#1
    3⤵
    - Blocklisted process makes network request
    - System Location Discovery: System Language Discovery
    PID:1552

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1552-12-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1552-24-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1552-14-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1552-8-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1552-4-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1552-9-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1552-34-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1552-32-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1552-10-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1552-16-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1552-2-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1552-36-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1552-11-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1552-18-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1552-20-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1552-22-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1552-30-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1552-26-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1552-28-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2280-0-0x0000000074BE0000-0x0000000074BEB000-memory.dmp

Filesize
44KB

Download
memory/2280-5-0x0000000074BE0000-0x0000000074BEB000-memory.dmp

Filesize
44KB

Download
memory/2280-6-0x0000000074BD0000-0x0000000074BDB000-memory.dmp

Filesize
44KB

Download
memory/2280-1-0x0000000074BD0000-0x0000000074BDB000-memory.dmp

Filesize
44KB

Download

Analysis

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