remcos | bd9ce1da9383fcd791d60260c5121733aa7c3c7d0d8f0cf3d7abe458efb13e9e

General

Target

PO.exe
Size

1.3MB
MD5

e19a187bacda437dc6934bf96cc1aa59
SHA1

784bcea3f13ab321cbeec1fa8a82841967390e33
SHA256

9dbd5e48e3742c2214862708b61e371007e4af7c633f1b2ef355816a22b248e1
SHA512

b2c2adfb60085bdf97ea414a8a05517785a0603806d617df17478ef1ef76cc738cac3dbc3537772cf50b5c0ddbe6d413eecc0324b5817831d318198c2a4bf825
SSDEEP

24576:+u6J33O0c+JY5UZ+XC0kGso6FabQVXV5nCLwsxSn0s7uMSxs9I4RWY:Qu0c++OCvkGs9Fabi5CF0j7P9IJY

Score

10^/10

remcos remotehost discovery rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

192.3.64.152:2559

Attributes

audio_folder
MicRecords
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-ZFXG9Y
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

Drops startup file 1 IoCs

Processes:

Dunlop.exe

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Dunlop.vbs	Dunlop.exe

Executes dropped EXE 1 IoCs

Processes:

Dunlop.exe

pid	Process
2536	Dunlop.exe

Loads dropped DLL 6 IoCs

Processes:

PO.exeWerFault.exe

pid	Process
2100	PO.exe
2336	WerFault.exe
2336	WerFault.exe
2336	WerFault.exe
2336	WerFault.exe
2336	WerFault.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

Processes:

resource	yara_rule
behavioral1/files/0x0008000000016ccb-8.dat	autoit_exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

Dunlop.exesvchost.exe

description	pid	Process	procid_target
PID 2536 set thread context of 1224	2536	Dunlop.exe	31
PID 1224 set thread context of 1960	1224	svchost.exe	33

Program crash 1 IoCs

Processes:

WerFault.exe

pid	pid_target	Process	procid_target
2336	2536	WerFault.exe	30

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

Processes:

PO.exeDunlop.exesvchost.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PO.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Dunlop.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

svchost.exe

pid	Process
1224	svchost.exe

Suspicious behavior: MapViewOfSection 2 IoCs

Processes:

Dunlop.exesvchost.exe

pid	Process
2536	Dunlop.exe
1224	svchost.exe

Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

PO.exeDunlop.exe

pid	Process
2100	PO.exe
2100	PO.exe
2536	Dunlop.exe
2536	Dunlop.exe

Suspicious use of SendNotifyMessage 4 IoCs

Processes:

PO.exeDunlop.exe

pid	Process
2100	PO.exe
2100	PO.exe
2536	Dunlop.exe
2536	Dunlop.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

PO.exeDunlop.exesvchost.exe

description	pid	Process	procid_target
PID 2100 wrote to memory of 2536	2100	PO.exe	30
PID 2100 wrote to memory of 2536	2100	PO.exe	30
PID 2100 wrote to memory of 2536	2100	PO.exe	30
PID 2100 wrote to memory of 2536	2100	PO.exe	30
PID 2536 wrote to memory of 1224	2536	Dunlop.exe	31
PID 2536 wrote to memory of 1224	2536	Dunlop.exe	31
PID 2536 wrote to memory of 1224	2536	Dunlop.exe	31
PID 2536 wrote to memory of 1224	2536	Dunlop.exe	31
PID 2536 wrote to memory of 1224	2536	Dunlop.exe	31
PID 2536 wrote to memory of 2336	2536	Dunlop.exe	32
PID 2536 wrote to memory of 2336	2536	Dunlop.exe	32
PID 2536 wrote to memory of 2336	2536	Dunlop.exe	32
PID 2536 wrote to memory of 2336	2536	Dunlop.exe	32
PID 1224 wrote to memory of 1960	1224	svchost.exe	33
PID 1224 wrote to memory of 1960	1224	svchost.exe	33
PID 1224 wrote to memory of 1960	1224	svchost.exe	33
PID 1224 wrote to memory of 1960	1224	svchost.exe	33
PID 1224 wrote to memory of 1960	1224	svchost.exe	33

C:\Users\Admin\AppData\Local\Temp\PO.exe
"C:\Users\Admin\AppData\Local\Temp\PO.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:2100
- C:\Users\Admin\AppData\Local\nonplacental\Dunlop.exe
  "C:\Users\Admin\AppData\Local\Temp\PO.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:2536
- - C:\Windows\SysWOW64\svchost.exe
    "C:\Users\Admin\AppData\Local\Temp\PO.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of WriteProcessMemory
    PID:1224
  - - C:\Windows\SysWOW64\svchost.exe
      C:\Windows\System32\svchost.exe
      4⤵
      PID:1960
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2536 -s 316
    3⤵
    - Loads dropped DLL
    - Program crash
    PID:2336

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

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\phagocytosed

MD5
d41d8cd98f00b204e9800998ecf8427e

SHA1
da39a3ee5e6b4b0d3255bfef95601890afd80709

SHA256
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

SHA512
cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

Download Submit
\Users\Admin\AppData\Local\nonplacental\Dunlop.exe

Filesize
1.3MB

MD5
e19a187bacda437dc6934bf96cc1aa59

SHA1
784bcea3f13ab321cbeec1fa8a82841967390e33

SHA256
9dbd5e48e3742c2214862708b61e371007e4af7c633f1b2ef355816a22b248e1

SHA512
b2c2adfb60085bdf97ea414a8a05517785a0603806d617df17478ef1ef76cc738cac3dbc3537772cf50b5c0ddbe6d413eecc0324b5817831d318198c2a4bf825

Download Submit
memory/1224-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1224-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1224-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1224-29-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1960-32-0x0000000000080000-0x0000000000088000-memory.dmp

Filesize
32KB

Download
memory/1960-31-0x0000000000080000-0x0000000000088000-memory.dmp

Filesize
32KB

Download
memory/1960-28-0x0000000000080000-0x0000000000088000-memory.dmp

Filesize
32KB

Download
memory/1960-26-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2100-6-0x0000000000A00000-0x0000000000E00000-memory.dmp

Filesize
4.0MB

Download
memory/2536-20-0x0000000000910000-0x0000000000D10000-memory.dmp

Filesize
4.0MB

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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