remcos | 5f9e2a0a06642d138483f7f7c67b8efe635b57a1f9a6106b9e88bc3b78ea7449

General

Target

5f9e2a0a06642d138483f7f7c67b8efe635b57a1f9a6106b9e88bc3b78ea7449N.exe
Size

139KB
MD5

8e50d1e530bb5ca8f617b762971ded80
SHA1

d4bd64a4e5e4099f4e8528e43d577c2467deeb29
SHA256

5f9e2a0a06642d138483f7f7c67b8efe635b57a1f9a6106b9e88bc3b78ea7449
SHA512

2134a7104e70ac19964beeef8c4f74af245d72b51ffbf110ef0d7cdf185ff31f3a2ea3a46be11a5469415c93a5ff5f48d2286cbc90779323cfd4ff8c28705bb0
SSDEEP

3072:xPd4n/M+WLcilrpgGH/GwY87mVmIXhIHVA:xP6/M+WLckOBhVmIYA

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-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation	5f9e2a0a06642d138483f7f7c67b8efe635b57a1f9a6106b9e88bc3b78ea7449N.exe

Executes dropped EXE 2 IoCs

pid	Process
2748	wn2ra4ohzdr.exe
4904	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-1-5-21-1302416131-1437503476-2806442725-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	5f9e2a0a06642d138483f7f7c67b8efe635b57a1f9a6106b9e88bc3b78ea7449N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2748 set thread context of 4904	2748	wn2ra4ohzdr.exe	89

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	5f9e2a0a06642d138483f7f7c67b8efe635b57a1f9a6106b9e88bc3b78ea7449N.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
4904	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4548 wrote to memory of 2748	4548	5f9e2a0a06642d138483f7f7c67b8efe635b57a1f9a6106b9e88bc3b78ea7449N.exe	83
PID 4548 wrote to memory of 2748	4548	5f9e2a0a06642d138483f7f7c67b8efe635b57a1f9a6106b9e88bc3b78ea7449N.exe	83
PID 4548 wrote to memory of 2748	4548	5f9e2a0a06642d138483f7f7c67b8efe635b57a1f9a6106b9e88bc3b78ea7449N.exe	83
PID 2748 wrote to memory of 4904	2748	wn2ra4ohzdr.exe	89
PID 2748 wrote to memory of 4904	2748	wn2ra4ohzdr.exe	89
PID 2748 wrote to memory of 4904	2748	wn2ra4ohzdr.exe	89
PID 2748 wrote to memory of 4904	2748	wn2ra4ohzdr.exe	89
PID 2748 wrote to memory of 4904	2748	wn2ra4ohzdr.exe	89
PID 2748 wrote to memory of 4904	2748	wn2ra4ohzdr.exe	89
PID 2748 wrote to memory of 4904	2748	wn2ra4ohzdr.exe	89
PID 2748 wrote to memory of 4904	2748	wn2ra4ohzdr.exe	89
PID 2748 wrote to memory of 4904	2748	wn2ra4ohzdr.exe	89

C:\Users\Admin\AppData\Local\Temp\5f9e2a0a06642d138483f7f7c67b8efe635b57a1f9a6106b9e88bc3b78ea7449N.exe
"C:\Users\Admin\AppData\Local\Temp\5f9e2a0a06642d138483f7f7c67b8efe635b57a1f9a6106b9e88bc3b78ea7449N.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4548
- 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:2748
- - 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:4904

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
71229f75d0ceabb5ff81cd5a508f95d3

SHA1
7bbc0de239068a49865abf64c91a1c596ed23a77

SHA256
dfbe65142b475c1ea414d402e581a909add0a7c181380fcdff99e3e64fb2a799

SHA512
0fc2aa2ecb427712705bff3457759299d08238e77baff857b97e855fbac66dab398215f95be86871f549bd8b90e4b580ed67580e04b409ca21cf357219dfe554

Download Submit
memory/2748-37-0x0000000074C80000-0x0000000075430000-memory.dmp

Filesize
7.7MB

Download
memory/2748-33-0x0000000074C80000-0x0000000075430000-memory.dmp

Filesize
7.7MB

Download
memory/2748-22-0x0000000074C80000-0x0000000075430000-memory.dmp

Filesize
7.7MB

Download
memory/2748-21-0x0000000074C80000-0x0000000075430000-memory.dmp

Filesize
7.7MB

Download
memory/4548-4-0x0000000004C40000-0x0000000004C4A000-memory.dmp

Filesize
40KB

Download
memory/4548-2-0x0000000005220000-0x00000000057C4000-memory.dmp

Filesize
5.6MB

Download
memory/4548-5-0x0000000074C80000-0x0000000075430000-memory.dmp

Filesize
7.7MB

Download
memory/4548-0-0x0000000074C8E000-0x0000000074C8F000-memory.dmp

Filesize
4KB

Download
memory/4548-20-0x0000000074C80000-0x0000000075430000-memory.dmp

Filesize
7.7MB

Download
memory/4548-3-0x0000000004C70000-0x0000000004D02000-memory.dmp

Filesize
584KB

Download
memory/4548-1-0x0000000000210000-0x0000000000238000-memory.dmp

Filesize
160KB

Download
memory/4548-6-0x0000000004FE0000-0x0000000005000000-memory.dmp

Filesize
128KB

Download
memory/4904-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4904-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4904-29-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4904-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4904-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4904-23-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads