remcos | 1cf5af136725445c7b1b36e50aa10aeaa0226204b986da39cd79cd6f71c97528

General

Target

4ee75d926b3161e73eab9cfd1f6ffe60N.exe
Size

139KB
MD5

4ee75d926b3161e73eab9cfd1f6ffe60
SHA1

52e6e90fbdc6170575b4e988293deb35b155ceaf
SHA256

1cf5af136725445c7b1b36e50aa10aeaa0226204b986da39cd79cd6f71c97528
SHA512

41e88bd551cee3e4569adcbcdc492f1bff71ce6bce3c23ef3e5345742323daf3f4deecc19fc771c5a88d787210eea762402f6ebff3bcb4c344f5a13884253646
SSDEEP

1536:ITHiPBX4nDzMyRXGHrc9YRHqbTypgpmb5Q+ZReSdhk/J+YLgD3mrxb53cSuYQjKp:xPd4n/M+WLcilrpgGH/GwY87mVmIX5

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
2908	wn2ra4ohzdr.exe
2708	wn2ra4ohzdr.exe

Loads dropped DLL 1 IoCs

pid	Process
2624	4ee75d926b3161e73eab9cfd1f6ffe60N.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-1-5-21-457978338-2990298471-2379561640-1000\Software\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	4ee75d926b3161e73eab9cfd1f6ffe60N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2908 set thread context of 2708	2908	wn2ra4ohzdr.exe	30

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	4ee75d926b3161e73eab9cfd1f6ffe60N.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
2708	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2624 wrote to memory of 2908	2624	4ee75d926b3161e73eab9cfd1f6ffe60N.exe	29
PID 2624 wrote to memory of 2908	2624	4ee75d926b3161e73eab9cfd1f6ffe60N.exe	29
PID 2624 wrote to memory of 2908	2624	4ee75d926b3161e73eab9cfd1f6ffe60N.exe	29
PID 2624 wrote to memory of 2908	2624	4ee75d926b3161e73eab9cfd1f6ffe60N.exe	29
PID 2908 wrote to memory of 2708	2908	wn2ra4ohzdr.exe	30
PID 2908 wrote to memory of 2708	2908	wn2ra4ohzdr.exe	30
PID 2908 wrote to memory of 2708	2908	wn2ra4ohzdr.exe	30
PID 2908 wrote to memory of 2708	2908	wn2ra4ohzdr.exe	30
PID 2908 wrote to memory of 2708	2908	wn2ra4ohzdr.exe	30
PID 2908 wrote to memory of 2708	2908	wn2ra4ohzdr.exe	30
PID 2908 wrote to memory of 2708	2908	wn2ra4ohzdr.exe	30
PID 2908 wrote to memory of 2708	2908	wn2ra4ohzdr.exe	30
PID 2908 wrote to memory of 2708	2908	wn2ra4ohzdr.exe	30
PID 2908 wrote to memory of 2708	2908	wn2ra4ohzdr.exe	30

C:\Users\Admin\AppData\Local\Temp\4ee75d926b3161e73eab9cfd1f6ffe60N.exe
"C:\Users\Admin\AppData\Local\Temp\4ee75d926b3161e73eab9cfd1f6ffe60N.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2624
- 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:2908
- - 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:2708

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
91368dad8444bcd8b788fce3fc1f0b44

SHA1
65ec44c47f6e55c698252d8ca85d9a07fc6bb98b

SHA256
aa9b0b4ebb5aa9f829b1f604e36a4e8a22bcbe791c796ab48d8048e9c35a2d32

SHA512
d62399f4d2a204f2792570e2a0f779dafbe1d9b1cb01570d6c289e4aff324b9c3c1f6ab2b6bd068e64370a3651f9f52ca93312db2ce608b2631f87a1f6bd2df5

Download Submit
memory/2624-0-0x0000000073C0E000-0x0000000073C0F000-memory.dmp

Filesize
4KB

Download
memory/2624-1-0x0000000000C00000-0x0000000000C28000-memory.dmp

Filesize
160KB

Download
memory/2624-2-0x0000000073C00000-0x00000000742EE000-memory.dmp

Filesize
6.9MB

Download
memory/2624-3-0x00000000005D0000-0x00000000005F0000-memory.dmp

Filesize
128KB

Download
memory/2624-6-0x0000000073C0E000-0x0000000073C0F000-memory.dmp

Filesize
4KB

Download
memory/2624-14-0x0000000073C00000-0x00000000742EE000-memory.dmp

Filesize
6.9MB

Download
memory/2708-17-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2708-27-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2708-44-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2708-36-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2708-30-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2708-35-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2708-29-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2708-39-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2708-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2708-21-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2708-19-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2908-13-0x0000000000BC0000-0x0000000000BE8000-memory.dmp

Filesize
160KB

Download
memory/2908-16-0x0000000073C00000-0x00000000742EE000-memory.dmp

Filesize
6.9MB

Download
memory/2908-40-0x0000000073C00000-0x00000000742EE000-memory.dmp

Filesize
6.9MB

Download
memory/2908-41-0x0000000073C00000-0x00000000742EE000-memory.dmp

Filesize
6.9MB

Download
memory/2908-15-0x0000000073C00000-0x00000000742EE000-memory.dmp

Filesize
6.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads