remcos | 20e4c5f39e170bbd15b198a648dff4efffa93ee65751965c86b32840aba9135a

General

Target

aae85c2cc2984b0ae5d0aaf40469ab10N.exe
Size

139KB
MD5

aae85c2cc2984b0ae5d0aaf40469ab10
SHA1

c5ce46932f96c4da1e0fa772dcf6f7aa22a14a2b
SHA256

20e4c5f39e170bbd15b198a648dff4efffa93ee65751965c86b32840aba9135a
SHA512

e98a1f235ff2a1bd2cf49984c7c0552b954c8d2e2a0a81b5ee243611f852a6c03d0d3e8ae4059a1432fa7f5d5addcc3b5f6bb7d9648551d38390be7ba3f3f0f5
SSDEEP

1536:ITHiPBX4nDzMyRXGHrc9YRHqbTypgpmb5Q+ZReSdhk/J+YLgD3mrxb53cSuYQjK7:xPd4n/M+WLcilrpgGH/GwY87mVmIXr

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	aae85c2cc2984b0ae5d0aaf40469ab10N.exe

Executes dropped EXE 2 IoCs

pid	Process
3680	wn2ra4ohzdr.exe
2040	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"	aae85c2cc2984b0ae5d0aaf40469ab10N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3680 set thread context of 2040	3680	wn2ra4ohzdr.exe	103

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	wn2ra4ohzdr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	aae85c2cc2984b0ae5d0aaf40469ab10N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wn2ra4ohzdr.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2040	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3296 wrote to memory of 3680	3296	aae85c2cc2984b0ae5d0aaf40469ab10N.exe	100
PID 3296 wrote to memory of 3680	3296	aae85c2cc2984b0ae5d0aaf40469ab10N.exe	100
PID 3296 wrote to memory of 3680	3296	aae85c2cc2984b0ae5d0aaf40469ab10N.exe	100
PID 3680 wrote to memory of 2040	3680	wn2ra4ohzdr.exe	103
PID 3680 wrote to memory of 2040	3680	wn2ra4ohzdr.exe	103
PID 3680 wrote to memory of 2040	3680	wn2ra4ohzdr.exe	103
PID 3680 wrote to memory of 2040	3680	wn2ra4ohzdr.exe	103
PID 3680 wrote to memory of 2040	3680	wn2ra4ohzdr.exe	103
PID 3680 wrote to memory of 2040	3680	wn2ra4ohzdr.exe	103
PID 3680 wrote to memory of 2040	3680	wn2ra4ohzdr.exe	103
PID 3680 wrote to memory of 2040	3680	wn2ra4ohzdr.exe	103
PID 3680 wrote to memory of 2040	3680	wn2ra4ohzdr.exe	103

C:\Users\Admin\AppData\Local\Temp\aae85c2cc2984b0ae5d0aaf40469ab10N.exe
"C:\Users\Admin\AppData\Local\Temp\aae85c2cc2984b0ae5d0aaf40469ab10N.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3296
- 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:3680
- - 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:2040

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=3960,i,15436195446242760253,4000484513008731869,262144 --variations-seed-version --mojo-platform-channel-handle=3484 /prefetch:8
1⤵
PID:4680

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
ca2b565994aa9a20811472a07c370c6c

SHA1
996984f9921b09aa100899434cf0c513425361ba

SHA256
c95816a4f7fa2dd082276829105dffc1f77636fce05d980c7f30327b045be0cd

SHA512
5e09387ca72fa89b00e9e96c30f748aee309d6aee0e137f6ffbc8729f56398033d881eb63dea4f6b6b60db1430af329071b84bc7256824647005036765d90894

Download Submit
memory/2040-31-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2040-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2040-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2040-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2040-27-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2040-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3296-5-0x0000000005060000-0x000000000506A000-memory.dmp

Filesize
40KB

Download
memory/3296-20-0x000000007441E000-0x000000007441F000-memory.dmp

Filesize
4KB

Download
memory/3296-22-0x0000000074410000-0x0000000074BC0000-memory.dmp

Filesize
7.7MB

Download
memory/3296-6-0x0000000005220000-0x0000000005240000-memory.dmp

Filesize
128KB

Download
memory/3296-0-0x000000007441E000-0x000000007441F000-memory.dmp

Filesize
4KB

Download
memory/3296-4-0x0000000074410000-0x0000000074BC0000-memory.dmp

Filesize
7.7MB

Download
memory/3296-3-0x0000000004F90000-0x0000000005022000-memory.dmp

Filesize
584KB

Download
memory/3296-2-0x00000000054A0000-0x0000000005A44000-memory.dmp

Filesize
5.6MB

Download
memory/3296-1-0x0000000000580000-0x00000000005A8000-memory.dmp

Filesize
160KB

Download
memory/3680-21-0x0000000074410000-0x0000000074BC0000-memory.dmp

Filesize
7.7MB

Download
memory/3680-23-0x0000000074410000-0x0000000074BC0000-memory.dmp

Filesize
7.7MB

Download
memory/3680-34-0x0000000074410000-0x0000000074BC0000-memory.dmp

Filesize
7.7MB

Download
memory/3680-36-0x0000000074410000-0x0000000074BC0000-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