remcos | 5aeb1293c473a66795bf0ff3a7892e6a6cf70aea5248a38f204632a5fdbe1f63

General

Target

5aeb1293c473a66795bf0ff3a7892e6a6cf70aea5248a38f204632a5fdbe1f63.exe
Size

1.6MB
MD5

15214c528c41de4d5e542ebd3d4ac075
SHA1

bdab48d323ab0e0c4689061db5fb08adfe1afec8
SHA256

5aeb1293c473a66795bf0ff3a7892e6a6cf70aea5248a38f204632a5fdbe1f63
SHA512

02b6635e4f1a98765e65ee14db0e93ab8dfdf4c7c0086addad86e4a09466ae49dc66accda0bc142828656fca994eb99255ea4c762ffc9f6706410e4877cc9fc2
SSDEEP

24576:t9tWunuwwAghUBUQyXGF8X0VMMOFdYHJStLidtLw8tWVq6VdbcGstKR18+YDQZp:NWtP4+P0Vn+dYHMwwjbV6Gst2aDQZp

Score

10^/10

remcos remotehost discovery persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

subddfg.lol:2404

Attributes

audio_folder
MicRecords
audio_path
ApplicationPath
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
Remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-A65UIX
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
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

Loads dropped DLL 2 IoCs

pid	Process
4924	5aeb1293c473a66795bf0ff3a7892e6a6cf70aea5248a38f204632a5fdbe1f63.exe
4924	5aeb1293c473a66795bf0ff3a7892e6a6cf70aea5248a38f204632a5fdbe1f63.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-1-5-21-940901362-3608833189-1915618603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Startup key = "C:\\Users\\Admin\\AppData\\Local\\Temp\\subfolder1\\Reaccented.scr"	5aeb1293c473a66795bf0ff3a7892e6a6cf70aea5248a38f204632a5fdbe1f63.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
4300	5aeb1293c473a66795bf0ff3a7892e6a6cf70aea5248a38f204632a5fdbe1f63.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4924	5aeb1293c473a66795bf0ff3a7892e6a6cf70aea5248a38f204632a5fdbe1f63.exe
4300	5aeb1293c473a66795bf0ff3a7892e6a6cf70aea5248a38f204632a5fdbe1f63.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4924 set thread context of 4300	4924	5aeb1293c473a66795bf0ff3a7892e6a6cf70aea5248a38f204632a5fdbe1f63.exe	91

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Common Files\polybuny\proteolysis.dat	5aeb1293c473a66795bf0ff3a7892e6a6cf70aea5248a38f204632a5fdbe1f63.exe

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 2 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	5aeb1293c473a66795bf0ff3a7892e6a6cf70aea5248a38f204632a5fdbe1f63.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5aeb1293c473a66795bf0ff3a7892e6a6cf70aea5248a38f204632a5fdbe1f63.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
4924	5aeb1293c473a66795bf0ff3a7892e6a6cf70aea5248a38f204632a5fdbe1f63.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4924 wrote to memory of 4300	4924	5aeb1293c473a66795bf0ff3a7892e6a6cf70aea5248a38f204632a5fdbe1f63.exe	91
PID 4924 wrote to memory of 4300	4924	5aeb1293c473a66795bf0ff3a7892e6a6cf70aea5248a38f204632a5fdbe1f63.exe	91
PID 4924 wrote to memory of 4300	4924	5aeb1293c473a66795bf0ff3a7892e6a6cf70aea5248a38f204632a5fdbe1f63.exe	91
PID 4924 wrote to memory of 4300	4924	5aeb1293c473a66795bf0ff3a7892e6a6cf70aea5248a38f204632a5fdbe1f63.exe	91
PID 4924 wrote to memory of 4300	4924	5aeb1293c473a66795bf0ff3a7892e6a6cf70aea5248a38f204632a5fdbe1f63.exe	91

C:\Users\Admin\AppData\Local\Temp\5aeb1293c473a66795bf0ff3a7892e6a6cf70aea5248a38f204632a5fdbe1f63.exe
"C:\Users\Admin\AppData\Local\Temp\5aeb1293c473a66795bf0ff3a7892e6a6cf70aea5248a38f204632a5fdbe1f63.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4924
- C:\Users\Admin\AppData\Local\Temp\5aeb1293c473a66795bf0ff3a7892e6a6cf70aea5248a38f204632a5fdbe1f63.exe
  "C:\Users\Admin\AppData\Local\Temp\5aeb1293c473a66795bf0ff3a7892e6a6cf70aea5248a38f204632a5fdbe1f63.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:4300

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

C:\Users\Admin\AppData\Local\Temp\BeConf.ini

Filesize
75B

MD5
3b76d3cd0fc3eb96afae754496ad3f71

SHA1
4ec65df20e96a6441767c8ac8c26fd55a67053b9

SHA256
3c1949b5049bd316a4187cd85947e4aa97b7db97a705cae80adb257f1c8602bb

SHA512
5344fae101c7c27592506b2139eaa165db0d4a4686d21c424b7b86389890b462865fc00b3219bf667a0c3b8c66ecc4483d5d853bf41bf077b22759cfe09dc003

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsuB836.tmp\System.dll

Filesize
11KB

MD5
0063d48afe5a0cdc02833145667b6641

SHA1
e7eb614805d183ecb1127c62decb1a6be1b4f7a8

SHA256
ac9dfe3b35ea4b8932536ed7406c29a432976b685cc5322f94ef93df920fede7

SHA512
71cbbcaeb345e09306e368717ea0503fe8df485be2e95200febc61bcd8ba74fb4211cd263c232f148c0123f6c6f2e3fd4ea20bdecc4070f5208c35c6920240f0

Download Submit
memory/4300-49-0x0000000000440000-0x0000000001694000-memory.dmp

Filesize
18.3MB

Download
memory/4300-50-0x0000000000440000-0x0000000001694000-memory.dmp

Filesize
18.3MB

Download
memory/4300-60-0x0000000000440000-0x0000000001694000-memory.dmp

Filesize
18.3MB

Download
memory/4300-35-0x0000000077BB8000-0x0000000077BB9000-memory.dmp

Filesize
4KB

Download
memory/4300-36-0x0000000077B31000-0x0000000077C51000-memory.dmp

Filesize
1.1MB

Download
memory/4300-41-0x0000000000440000-0x0000000001694000-memory.dmp

Filesize
18.3MB

Download
memory/4300-42-0x0000000000440000-0x0000000001694000-memory.dmp

Filesize
18.3MB

Download
memory/4300-46-0x0000000077B31000-0x0000000077C51000-memory.dmp

Filesize
1.1MB

Download
memory/4300-47-0x0000000077B31000-0x0000000077C51000-memory.dmp

Filesize
1.1MB

Download
memory/4300-51-0x0000000000440000-0x0000000001694000-memory.dmp

Filesize
18.3MB

Download
memory/4300-59-0x0000000000440000-0x0000000001694000-memory.dmp

Filesize
18.3MB

Download
memory/4300-58-0x0000000000440000-0x0000000001694000-memory.dmp

Filesize
18.3MB

Download
memory/4300-48-0x0000000000440000-0x0000000001694000-memory.dmp

Filesize
18.3MB

Download
memory/4300-52-0x0000000000440000-0x0000000001694000-memory.dmp

Filesize
18.3MB

Download
memory/4300-53-0x0000000000440000-0x0000000001694000-memory.dmp

Filesize
18.3MB

Download
memory/4300-54-0x0000000000440000-0x0000000001694000-memory.dmp

Filesize
18.3MB

Download
memory/4300-55-0x0000000000440000-0x0000000001694000-memory.dmp

Filesize
18.3MB

Download
memory/4300-56-0x0000000000440000-0x0000000001694000-memory.dmp

Filesize
18.3MB

Download
memory/4300-57-0x0000000000440000-0x0000000001694000-memory.dmp

Filesize
18.3MB

Download
memory/4924-32-0x0000000077B31000-0x0000000077C51000-memory.dmp

Filesize
1.1MB

Download
memory/4924-34-0x0000000074784000-0x0000000074785000-memory.dmp

Filesize
4KB

Download
memory/4924-33-0x0000000077B31000-0x0000000077C51000-memory.dmp

Filesize
1.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads