remcos | 288362fe0cf3682c218fd476a7ff4d7ab5abd56703fb7c5ec1ec0229193fd602

General

Target

ENQ02344.exe
Size

1.3MB
MD5

db6377387e0216c9cac9f54226a3b932
SHA1

722abe694938d5da9e66b603d7677594efa8b3ee
SHA256

8ab3354b91361d4860265097706bff6c4bfe578002fd53a92072f2fa1e123116
SHA512

bb94a414b98f39fa7823c8f71a80dea169996274cffff0e520dd28d7cf627a5604305495c6466b900b836951166f092fe4b952458acfb973772b79d5baa5159f
SSDEEP

24576:yqDEvCTbMWu7rQYlBQcBiT6rprG8atQta3kD+OnqH0pm/J7u2f:yTvC/MTQYxsWR7atUD+OqH0pm/k

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

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

Executes dropped EXE 1 IoCs

pid	Process
2356	underbalance.exe

Loads dropped DLL 1 IoCs

pid	Process
3064	ENQ02344.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/files/0x0009000000015d2a-8.dat	autoit_exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2356 set thread context of 2788	2356	underbalance.exe	31
PID 2788 set thread context of 2476	2788	svchost.exe	32

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	ENQ02344.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	underbalance.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2788	svchost.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
2356	underbalance.exe
2788	svchost.exe

Suspicious use of FindShellTrayWindow 5 IoCs

pid	Process
3064	ENQ02344.exe
3064	ENQ02344.exe
2356	underbalance.exe
2356	underbalance.exe
2356	underbalance.exe

Suspicious use of SendNotifyMessage 5 IoCs

pid	Process
3064	ENQ02344.exe
3064	ENQ02344.exe
2356	underbalance.exe
2356	underbalance.exe
2356	underbalance.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 3064 wrote to memory of 2356	3064	ENQ02344.exe	30
PID 3064 wrote to memory of 2356	3064	ENQ02344.exe	30
PID 3064 wrote to memory of 2356	3064	ENQ02344.exe	30
PID 3064 wrote to memory of 2356	3064	ENQ02344.exe	30
PID 2356 wrote to memory of 2788	2356	underbalance.exe	31
PID 2356 wrote to memory of 2788	2356	underbalance.exe	31
PID 2356 wrote to memory of 2788	2356	underbalance.exe	31
PID 2356 wrote to memory of 2788	2356	underbalance.exe	31
PID 2356 wrote to memory of 2788	2356	underbalance.exe	31
PID 2788 wrote to memory of 2476	2788	svchost.exe	32
PID 2788 wrote to memory of 2476	2788	svchost.exe	32
PID 2788 wrote to memory of 2476	2788	svchost.exe	32
PID 2788 wrote to memory of 2476	2788	svchost.exe	32
PID 2788 wrote to memory of 2476	2788	svchost.exe	32

C:\Users\Admin\AppData\Local\Temp\ENQ02344.exe
"C:\Users\Admin\AppData\Local\Temp\ENQ02344.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:3064
- C:\Users\Admin\AppData\Local\supergroup\underbalance.exe
  "C:\Users\Admin\AppData\Local\Temp\ENQ02344.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:2356
- - C:\Windows\SysWOW64\svchost.exe
    "C:\Users\Admin\AppData\Local\Temp\ENQ02344.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of WriteProcessMemory
    PID:2788
  - - C:\Windows\SysWOW64\svchost.exe
      C:\Windows\System32\svchost.exe
      4⤵
      PID:2476

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

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\supergroup\underbalance.exe

Filesize
1.3MB

MD5
db6377387e0216c9cac9f54226a3b932

SHA1
722abe694938d5da9e66b603d7677594efa8b3ee

SHA256
8ab3354b91361d4860265097706bff6c4bfe578002fd53a92072f2fa1e123116

SHA512
bb94a414b98f39fa7823c8f71a80dea169996274cffff0e520dd28d7cf627a5604305495c6466b900b836951166f092fe4b952458acfb973772b79d5baa5159f

Download Submit
memory/2356-20-0x0000000000830000-0x0000000000C30000-memory.dmp

Filesize
4.0MB

Download
memory/2476-26-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2476-28-0x0000000000080000-0x0000000000088000-memory.dmp

Filesize
32KB

Download
memory/2476-31-0x0000000000080000-0x0000000000088000-memory.dmp

Filesize
32KB

Download
memory/2476-32-0x0000000000080000-0x0000000000088000-memory.dmp

Filesize
32KB

Download
memory/2476-33-0x0000000000080000-0x0000000000088000-memory.dmp

Filesize
32KB

Download
memory/2788-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2788-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2788-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2788-29-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3064-6-0x00000000006D0000-0x0000000000AD0000-memory.dmp

Filesize
4.0MB

Download

Analysis

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