remcos | 223be7beb431729647ff189289ba407c3d96a4458c443d2293c559f96f5d5a1b

General

Target

223be7beb431729647ff189289ba407c3d96a4458c443d2293c559f96f5d5a1b.exe
Size

139KB
MD5

8fca0ed499ae62412e382b1a5c37b9d9
SHA1

99c35644e20ce4f56de398010650be2e98b914ca
SHA256

223be7beb431729647ff189289ba407c3d96a4458c443d2293c559f96f5d5a1b
SHA512

9495cb6225b8c578b35964325687255af964e373f71521724baed086f1ea8a5b9cd01be8cf481420c21a1f381ba25105c0477ec2a818fe4c5edf9b7a04c1cfef
SSDEEP

1536:ITHiPBX4nDzMyRXGHrc9YRHqbTypgpmb5Q+ZReSdhk/J+YLgD3mrxb53cSuYQjKM:xPd4n/M+WLcilrpgGH/GwY87mVmIX8

Score

10^/10

remcos host discovery persistence rat

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

C2

systemcontrol.ddns.net:45000

systemcontrol2.ddns.net:45000

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
OfficeUpgrade.exe
copy_folder
OfficeUpgrade
delete_file
false
hide_file
true
hide_keylog_file
true
install_flag
false
install_path
%AppData%
keylog_crypt
true
keylog_file
Upgrader.dat
keylog_flag
false
keylog_folder
Upgrader
keylog_path
%AppData%
mouse_option
false
mutex
req_khauflaoyr
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screens
screenshot_path
%AppData%
screenshot_time
1
startup_value
OfficeUpgrade
take_screenshot_option
false
take_screenshot_time
5

Signatures

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

Executes dropped EXE 2 IoCs

pid	Process
532	wn2ra4ohzdr.exe
2540	wn2ra4ohzdr.exe

Loads dropped DLL 1 IoCs

pid	Process
1868	223be7beb431729647ff189289ba407c3d96a4458c443d2293c559f96f5d5a1b.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3290804112-2823094203-3137964600-1000\Software\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	223be7beb431729647ff189289ba407c3d96a4458c443d2293c559f96f5d5a1b.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 532 set thread context of 2540	532	wn2ra4ohzdr.exe	31

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 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	223be7beb431729647ff189289ba407c3d96a4458c443d2293c559f96f5d5a1b.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wn2ra4ohzdr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wn2ra4ohzdr.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2540	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1868 wrote to memory of 532	1868	223be7beb431729647ff189289ba407c3d96a4458c443d2293c559f96f5d5a1b.exe	30
PID 1868 wrote to memory of 532	1868	223be7beb431729647ff189289ba407c3d96a4458c443d2293c559f96f5d5a1b.exe	30
PID 1868 wrote to memory of 532	1868	223be7beb431729647ff189289ba407c3d96a4458c443d2293c559f96f5d5a1b.exe	30
PID 1868 wrote to memory of 532	1868	223be7beb431729647ff189289ba407c3d96a4458c443d2293c559f96f5d5a1b.exe	30
PID 532 wrote to memory of 2540	532	wn2ra4ohzdr.exe	31
PID 532 wrote to memory of 2540	532	wn2ra4ohzdr.exe	31
PID 532 wrote to memory of 2540	532	wn2ra4ohzdr.exe	31
PID 532 wrote to memory of 2540	532	wn2ra4ohzdr.exe	31
PID 532 wrote to memory of 2540	532	wn2ra4ohzdr.exe	31
PID 532 wrote to memory of 2540	532	wn2ra4ohzdr.exe	31
PID 532 wrote to memory of 2540	532	wn2ra4ohzdr.exe	31
PID 532 wrote to memory of 2540	532	wn2ra4ohzdr.exe	31
PID 532 wrote to memory of 2540	532	wn2ra4ohzdr.exe	31
PID 532 wrote to memory of 2540	532	wn2ra4ohzdr.exe	31

C:\Users\Admin\AppData\Local\Temp\223be7beb431729647ff189289ba407c3d96a4458c443d2293c559f96f5d5a1b.exe
"C:\Users\Admin\AppData\Local\Temp\223be7beb431729647ff189289ba407c3d96a4458c443d2293c559f96f5d5a1b.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1868
- C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe
  "C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:532
- - C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe
    "C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:2540

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe

Filesize
139KB

MD5
9446ba44ad422ad17a5b2388a36955a8

SHA1
1f1c2054352b6eb59b9efbb9ae6ce34e363a214c

SHA256
2a5c573f7830ae40351cec9e06dcf6fdfeba7f951c21fb81405cf87a1c3ec83d

SHA512
45c2a444989777df47e7faf34c8a0b60b0c25fc965301273bdffec7f79e8ffc94613bc0ac1ea75163b540bcd6cc6bad46f24aeb16a4f9e4482e88bd2d7797596

Download Submit
memory/532-38-0x00000000746A0000-0x0000000074D8E000-memory.dmp

Filesize
6.9MB

Download
memory/532-14-0x00000000746A0000-0x0000000074D8E000-memory.dmp

Filesize
6.9MB

Download
memory/532-13-0x0000000000B10000-0x0000000000B38000-memory.dmp

Filesize
160KB

Download
memory/532-15-0x00000000746A0000-0x0000000074D8E000-memory.dmp

Filesize
6.9MB

Download
memory/532-39-0x00000000746A0000-0x0000000074D8E000-memory.dmp

Filesize
6.9MB

Download
memory/1868-1-0x0000000001120000-0x0000000001148000-memory.dmp

Filesize
160KB

Download
memory/1868-2-0x00000000746A0000-0x0000000074D8E000-memory.dmp

Filesize
6.9MB

Download
memory/1868-3-0x0000000000510000-0x0000000000530000-memory.dmp

Filesize
128KB

Download
memory/1868-12-0x00000000746A0000-0x0000000074D8E000-memory.dmp

Filesize
6.9MB

Download
memory/1868-0-0x00000000746AE000-0x00000000746AF000-memory.dmp

Filesize
4KB

Download
memory/2540-27-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2540-23-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2540-20-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2540-16-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2540-18-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2540-33-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2540-34-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2540-35-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2540-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2540-28-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2540-42-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads