remcos | 88586521287a64331eb275b700110ff4fae5884e8a62655fe88cae71d59cb73c

General

Target

88586521287a64331eb275b700110ff4fae5884e8a62655fe88cae71d59cb73cN.exe
Size

140KB
MD5

26ef5428d0ca17146002a3cea5b96810
SHA1

c2e9289ff3932e602884ce4d1f03f0fde8c2e67a
SHA256

88586521287a64331eb275b700110ff4fae5884e8a62655fe88cae71d59cb73c
SHA512

795bdcb328f09ff8c1f5f2934fd104c8865f1ac744bac01d988def996ce7a521139d8a686bb7bd8f6ceda74891ab560c96b86d09f0fc62ca6f98d003b0758c77
SSDEEP

3072:xPd4n/M+WLcilrpgGH/GwY87mVmIXhIHVSJ:xP6/M+WLckOBhVmIYI

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
Remcos family
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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	88586521287a64331eb275b700110ff4fae5884e8a62655fe88cae71d59cb73cN.exe

Executes dropped EXE 2 IoCs

pid	Process
4476	wn2ra4ohzdr.exe
1716	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-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	88586521287a64331eb275b700110ff4fae5884e8a62655fe88cae71d59cb73cN.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4476 set thread context of 1716	4476	wn2ra4ohzdr.exe	96

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	88586521287a64331eb275b700110ff4fae5884e8a62655fe88cae71d59cb73cN.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
1716	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2372 wrote to memory of 4476	2372	88586521287a64331eb275b700110ff4fae5884e8a62655fe88cae71d59cb73cN.exe	86
PID 2372 wrote to memory of 4476	2372	88586521287a64331eb275b700110ff4fae5884e8a62655fe88cae71d59cb73cN.exe	86
PID 2372 wrote to memory of 4476	2372	88586521287a64331eb275b700110ff4fae5884e8a62655fe88cae71d59cb73cN.exe	86
PID 4476 wrote to memory of 1716	4476	wn2ra4ohzdr.exe	96
PID 4476 wrote to memory of 1716	4476	wn2ra4ohzdr.exe	96
PID 4476 wrote to memory of 1716	4476	wn2ra4ohzdr.exe	96
PID 4476 wrote to memory of 1716	4476	wn2ra4ohzdr.exe	96
PID 4476 wrote to memory of 1716	4476	wn2ra4ohzdr.exe	96
PID 4476 wrote to memory of 1716	4476	wn2ra4ohzdr.exe	96
PID 4476 wrote to memory of 1716	4476	wn2ra4ohzdr.exe	96
PID 4476 wrote to memory of 1716	4476	wn2ra4ohzdr.exe	96
PID 4476 wrote to memory of 1716	4476	wn2ra4ohzdr.exe	96

C:\Users\Admin\AppData\Local\Temp\88586521287a64331eb275b700110ff4fae5884e8a62655fe88cae71d59cb73cN.exe
"C:\Users\Admin\AppData\Local\Temp\88586521287a64331eb275b700110ff4fae5884e8a62655fe88cae71d59cb73cN.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2372
- 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:4476
- - 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:1716

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
140KB

MD5
47c7042d1220c258a5e66f62db86385f

SHA1
4b5a8a5c6eb043778f3dcdfe3e885a948e7be198

SHA256
6f7b2624465dc721ceb1b37d0c4da6da1d1706f2a4350d485cccf8bf9c2f9bfc

SHA512
8fb55fe9b9fd5f6bc04555fc9afc0d09ffceee4e80358873c360818515cdd162787f403e4af9712169737d46561822ecc0b5a9bb0232689dbdf90bb89cfd89f6

Download Submit
memory/1716-31-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1716-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1716-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1716-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1716-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1716-27-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2372-5-0x0000000074770000-0x0000000074F20000-memory.dmp

Filesize
7.7MB

Download
memory/2372-16-0x000000007477E000-0x000000007477F000-memory.dmp

Filesize
4KB

Download
memory/2372-21-0x0000000074770000-0x0000000074F20000-memory.dmp

Filesize
7.7MB

Download
memory/2372-6-0x0000000005B80000-0x0000000005BA0000-memory.dmp

Filesize
128KB

Download
memory/2372-0-0x000000007477E000-0x000000007477F000-memory.dmp

Filesize
4KB

Download
memory/2372-4-0x0000000005A10000-0x0000000005A1A000-memory.dmp

Filesize
40KB

Download
memory/2372-3-0x0000000005A50000-0x0000000005AE2000-memory.dmp

Filesize
584KB

Download
memory/2372-2-0x0000000006000000-0x00000000065A4000-memory.dmp

Filesize
5.6MB

Download
memory/2372-1-0x0000000000FE0000-0x0000000001008000-memory.dmp

Filesize
160KB

Download
memory/4476-22-0x0000000074770000-0x0000000074F20000-memory.dmp

Filesize
7.7MB

Download
memory/4476-23-0x0000000074770000-0x0000000074F20000-memory.dmp

Filesize
7.7MB

Download
memory/4476-34-0x0000000074770000-0x0000000074F20000-memory.dmp

Filesize
7.7MB

Download
memory/4476-36-0x0000000074770000-0x0000000074F20000-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