remcos | c9fab624be92feff5e6666dc84c8b1a1fa23d4535f0960806defa8b30817e133

General

Target

c9fab624be92feff5e6666dc84c8b1a1fa23d4535f0960806defa8b30817e133.exe
Size

140KB
MD5

34842ed9c54bd4205d1aa40ebc118310
SHA1

4cf7b739e561beb0f661fccd25ccc2c28a988410
SHA256

c9fab624be92feff5e6666dc84c8b1a1fa23d4535f0960806defa8b30817e133
SHA512

8baafb898697206325f1ae05bda968b2566cfce4366cba51831e55a2f01465bf26aa710e7d4242794e3a52e3e86b47389c78a3e0473086a0571f6323f4896b31
SSDEEP

3072:xPd4n/M+WLcilrpgGH/GwY87mVmIXhIHVSdC:xP6/M+WLckOBhVmIYmC

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

Boot or Logon Autostart Execution: Active Setup 2 TTPs 1 IoCs

Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

persistence

Active Setup

T1547.014

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2872745919-2748461613-2989606286-1000\Software\Microsoft\Active Setup\Installed Components	explorer.exe

Executes dropped EXE 2 IoCs

pid	Process
2664	wn2ra4ohzdr.exe
2824	wn2ra4ohzdr.exe

Loads dropped DLL 1 IoCs

pid	Process
2536	c9fab624be92feff5e6666dc84c8b1a1fa23d4535f0960806defa8b30817e133.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-1-5-21-2872745919-2748461613-2989606286-1000\Software\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	c9fab624be92feff5e6666dc84c8b1a1fa23d4535f0960806defa8b30817e133.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2664 set thread context of 2824	2664	wn2ra4ohzdr.exe	33

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	c9fab624be92feff5e6666dc84c8b1a1fa23d4535f0960806defa8b30817e133.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wn2ra4ohzdr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wn2ra4ohzdr.exe

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2872745919-2748461613-2989606286-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2872745919-2748461613-2989606286-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2872745919-2748461613-2989606286-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2872745919-2748461613-2989606286-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2872745919-2748461613-2989606286-1000_Classes\Local Settings	explorer.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2116	explorer.exe

Suspicious use of AdjustPrivilegeToken 12 IoCs

description	pid	Process
Token: SeShutdownPrivilege	2116	explorer.exe
Token: SeShutdownPrivilege	2116	explorer.exe
Token: SeShutdownPrivilege	2116	explorer.exe
Token: SeShutdownPrivilege	2116	explorer.exe
Token: SeShutdownPrivilege	2116	explorer.exe
Token: SeShutdownPrivilege	2116	explorer.exe
Token: SeShutdownPrivilege	2116	explorer.exe
Token: SeShutdownPrivilege	2116	explorer.exe
Token: SeShutdownPrivilege	2116	explorer.exe
Token: SeShutdownPrivilege	2116	explorer.exe
Token: SeShutdownPrivilege	2116	explorer.exe
Token: SeShutdownPrivilege	2116	explorer.exe

Suspicious use of FindShellTrayWindow 24 IoCs

pid	Process
2116	explorer.exe
2116	explorer.exe
2116	explorer.exe
2116	explorer.exe
2116	explorer.exe
2116	explorer.exe
2116	explorer.exe
2116	explorer.exe
2116	explorer.exe
2116	explorer.exe
2116	explorer.exe
2116	explorer.exe
2116	explorer.exe
2116	explorer.exe
2116	explorer.exe
2116	explorer.exe
2116	explorer.exe
2116	explorer.exe
2116	explorer.exe
2116	explorer.exe
2116	explorer.exe
2116	explorer.exe
2116	explorer.exe
2116	explorer.exe

Suspicious use of SendNotifyMessage 16 IoCs

pid	Process
2116	explorer.exe
2116	explorer.exe
2116	explorer.exe
2116	explorer.exe
2116	explorer.exe
2116	explorer.exe
2116	explorer.exe
2116	explorer.exe
2116	explorer.exe
2116	explorer.exe
2116	explorer.exe
2116	explorer.exe
2116	explorer.exe
2116	explorer.exe
2116	explorer.exe
2116	explorer.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2824	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2536 wrote to memory of 2664	2536	c9fab624be92feff5e6666dc84c8b1a1fa23d4535f0960806defa8b30817e133.exe	32
PID 2536 wrote to memory of 2664	2536	c9fab624be92feff5e6666dc84c8b1a1fa23d4535f0960806defa8b30817e133.exe	32
PID 2536 wrote to memory of 2664	2536	c9fab624be92feff5e6666dc84c8b1a1fa23d4535f0960806defa8b30817e133.exe	32
PID 2536 wrote to memory of 2664	2536	c9fab624be92feff5e6666dc84c8b1a1fa23d4535f0960806defa8b30817e133.exe	32
PID 2664 wrote to memory of 2824	2664	wn2ra4ohzdr.exe	33
PID 2664 wrote to memory of 2824	2664	wn2ra4ohzdr.exe	33
PID 2664 wrote to memory of 2824	2664	wn2ra4ohzdr.exe	33
PID 2664 wrote to memory of 2824	2664	wn2ra4ohzdr.exe	33
PID 2664 wrote to memory of 2824	2664	wn2ra4ohzdr.exe	33
PID 2664 wrote to memory of 2824	2664	wn2ra4ohzdr.exe	33
PID 2664 wrote to memory of 2824	2664	wn2ra4ohzdr.exe	33
PID 2664 wrote to memory of 2824	2664	wn2ra4ohzdr.exe	33
PID 2664 wrote to memory of 2824	2664	wn2ra4ohzdr.exe	33
PID 2664 wrote to memory of 2824	2664	wn2ra4ohzdr.exe	33

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\c9fab624be92feff5e6666dc84c8b1a1fa23d4535f0960806defa8b30817e133.exe
"C:\Users\Admin\AppData\Local\Temp\c9fab624be92feff5e6666dc84c8b1a1fa23d4535f0960806defa8b30817e133.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2536
- 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:2664
- - 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:2824

C:\Windows\explorer.exe
explorer.exe
1⤵
- Boot or Logon Autostart Execution: Active Setup
- Modifies registry class
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:2116

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2

T1547

Active Setup

1

T1547.014

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Active Setup

1

T1547.014

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Query Registry

1

T1012

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
141KB

MD5
5159ca8f73fac2167620874a9a10fda0

SHA1
ae41aff7a7a3301c61f4a34f6918ed5ee4a85472

SHA256
b2d99a46d83eb4dbd608e7a5f3f497a67f443a53ebcfea4a10ae51005217ed61

SHA512
617212578acad2ce650a414b37f4444c75f2871a4151baad418b18e623c775bd7d37f388a9954bbe905797d47a887ee627ab9483370b5ee60dcfa87774eead6f

Download Submit
memory/2536-0-0x0000000073D0E000-0x0000000073D0F000-memory.dmp

Filesize
4KB

Download
memory/2536-1-0x0000000000AA0000-0x0000000000AC8000-memory.dmp

Filesize
160KB

Download
memory/2536-2-0x0000000073D00000-0x00000000743EE000-memory.dmp

Filesize
6.9MB

Download
memory/2536-3-0x00000000008A0000-0x00000000008C0000-memory.dmp

Filesize
128KB

Download
memory/2536-12-0x0000000073D00000-0x00000000743EE000-memory.dmp

Filesize
6.9MB

Download
memory/2664-13-0x0000000000C10000-0x0000000000C38000-memory.dmp

Filesize
160KB

Download
memory/2824-16-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2824-14-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2824-28-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2824-27-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2824-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2824-21-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2824-18-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2824-31-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2824-32-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads