remcos | ed5391fd4d979f93106992c27ae240ddd1cdff407c11bcbb5def272901978065

General

Target

ed5391fd4d979f93106992c27ae240ddd1cdff407c11bcbb5def272901978065.exe
Size

139KB
MD5

59fe5df73a4e6530b74b9c6905057b68
SHA1

1a70fd94ac0f65e9c0a022931cdba47fd49e8060
SHA256

ed5391fd4d979f93106992c27ae240ddd1cdff407c11bcbb5def272901978065
SHA512

c39bcb9359345bffc8df3f400cd4965ee90f67d6fbe1bd4dcc4f17685c21d3758a19e46ab9527a5003f83e2bd7dcd2826eb08d98c21cafb0176c73b7b9f70534
SSDEEP

1536:ITHiPBX4nDzMyRXGHrc9YRHqbTypgpmb5Q+ZReSdhk/J+YLgD3mrxb53cSuYQjKt:xPd4n/M+WLcilrpgGH/GwY87mVmIXd

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

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-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\International\Geo\Nation	ed5391fd4d979f93106992c27ae240ddd1cdff407c11bcbb5def272901978065.exe

Executes dropped EXE 2 IoCs

pid	Process
4012	wn2ra4ohzdr.exe
820	wn2ra4ohzdr.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-1-5-21-2170637797-568393320-3232933035-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	ed5391fd4d979f93106992c27ae240ddd1cdff407c11bcbb5def272901978065.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4012 set thread context of 820	4012	wn2ra4ohzdr.exe	104

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	ed5391fd4d979f93106992c27ae240ddd1cdff407c11bcbb5def272901978065.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
820	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2200 wrote to memory of 4012	2200	ed5391fd4d979f93106992c27ae240ddd1cdff407c11bcbb5def272901978065.exe	100
PID 2200 wrote to memory of 4012	2200	ed5391fd4d979f93106992c27ae240ddd1cdff407c11bcbb5def272901978065.exe	100
PID 2200 wrote to memory of 4012	2200	ed5391fd4d979f93106992c27ae240ddd1cdff407c11bcbb5def272901978065.exe	100
PID 4012 wrote to memory of 820	4012	wn2ra4ohzdr.exe	104
PID 4012 wrote to memory of 820	4012	wn2ra4ohzdr.exe	104
PID 4012 wrote to memory of 820	4012	wn2ra4ohzdr.exe	104
PID 4012 wrote to memory of 820	4012	wn2ra4ohzdr.exe	104
PID 4012 wrote to memory of 820	4012	wn2ra4ohzdr.exe	104
PID 4012 wrote to memory of 820	4012	wn2ra4ohzdr.exe	104
PID 4012 wrote to memory of 820	4012	wn2ra4ohzdr.exe	104
PID 4012 wrote to memory of 820	4012	wn2ra4ohzdr.exe	104
PID 4012 wrote to memory of 820	4012	wn2ra4ohzdr.exe	104

C:\Users\Admin\AppData\Local\Temp\ed5391fd4d979f93106992c27ae240ddd1cdff407c11bcbb5def272901978065.exe
"C:\Users\Admin\AppData\Local\Temp\ed5391fd4d979f93106992c27ae240ddd1cdff407c11bcbb5def272901978065.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2200
- 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:4012
- - 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:820

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4180,i,3210801877307184477,8078594481454001567,262144 --variations-seed-version --mojo-platform-channel-handle=2184 /prefetch:8
1⤵
PID:4968

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

Query Registry

1

T1012

System Information Discovery

2

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

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

Filesize
139KB

MD5
e9bba68b08135ded3de8326f8b0a8b39

SHA1
2d5394bf275553a24179ec2045127377b1a3d449

SHA256
ede24dab5913e45f3c40e8eaef3711409ee58d03569f0bdc6cdc6645de4e0a58

SHA512
b5b6012ec98ec8a07974842ac835ec00a94f4cd5da88541e7e069de02e05587bb1309c820dbbec184d20d8671a91837549b5ff96826f526c4d6b8ec271fd6e25

Download Submit
memory/820-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/820-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/820-29-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/820-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/820-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/820-23-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2200-4-0x00000000745E0000-0x0000000074D90000-memory.dmp

Filesize
7.7MB

Download
memory/2200-21-0x00000000745E0000-0x0000000074D90000-memory.dmp

Filesize
7.7MB

Download
memory/2200-6-0x0000000005430000-0x0000000005450000-memory.dmp

Filesize
128KB

Download
memory/2200-5-0x0000000005390000-0x000000000539A000-memory.dmp

Filesize
40KB

Download
memory/2200-0-0x00000000745EE000-0x00000000745EF000-memory.dmp

Filesize
4KB

Download
memory/2200-3-0x00000000052F0000-0x0000000005382000-memory.dmp

Filesize
584KB

Download
memory/2200-2-0x0000000005980000-0x0000000005F24000-memory.dmp

Filesize
5.6MB

Download
memory/2200-1-0x00000000008C0000-0x00000000008E8000-memory.dmp

Filesize
160KB

Download
memory/4012-20-0x00000000745E0000-0x0000000074D90000-memory.dmp

Filesize
7.7MB

Download
memory/4012-22-0x00000000745E0000-0x0000000074D90000-memory.dmp

Filesize
7.7MB

Download
memory/4012-33-0x00000000745E0000-0x0000000074D90000-memory.dmp

Filesize
7.7MB

Download
memory/4012-37-0x00000000745E0000-0x0000000074D90000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads