remcos | 79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289

General

Target

79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289.exe
Size

1.1MB
MD5

f02ee994d7fe02a11c3314b135e2eb5e
SHA1

067d3c3349b64a5c9b6c6269df8a78624450cc03
SHA256

79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289
SHA512

d8ca0faa09ed9ce5210b0326df577d8ae2b94a1f135fd272c70b41b6ef14bd1cb0b01aad5e4b33e076e341eed7eda6ccec8e612297d1622f2a30c95b14a3e03b
SSDEEP

24576:eaTgKwZ14X27uUL3VM0kd+rkhfMsjgkAj2JE06J5N0Fq:LTgdZOcuUL3xAx/8b2S7Z0I

Score

10^/10

remcos chinemerem discovery rat

Malware Config

Extracted

Family

remcos

Version

2.2.2 Pro

Botnet

chinemerem

C2

remcoss.onmypc.org:3765

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
remcos.exe
copy_folder
remcos
delete_file
false
hide_file
false
hide_keylog_file
true
install_flag
false
install_path
%AppData%
keylog_crypt
true
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
r-8ET8H0
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
remcos
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

Executes dropped EXE 1 IoCs

pid	Process
2596	AboutSettingsHandlers.exe

AutoIT Executable 2 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/memory/2412-20-0x0000000001220000-0x00000000013A9000-memory.dmp	autoit_exe
behavioral1/memory/2412-25-0x0000000001220000-0x00000000013A9000-memory.dmp	autoit_exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2412 set thread context of 2752	2412	79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289.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 4 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	79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AboutSettingsHandlers.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2112	schtasks.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2752	79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2412 wrote to memory of 2752	2412	79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289.exe	30
PID 2412 wrote to memory of 2752	2412	79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289.exe	30
PID 2412 wrote to memory of 2752	2412	79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289.exe	30
PID 2412 wrote to memory of 2752	2412	79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289.exe	30
PID 2412 wrote to memory of 2752	2412	79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289.exe	30
PID 2412 wrote to memory of 2752	2412	79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289.exe	30
PID 2412 wrote to memory of 2112	2412	79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289.exe	31
PID 2412 wrote to memory of 2112	2412	79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289.exe	31
PID 2412 wrote to memory of 2112	2412	79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289.exe	31
PID 2412 wrote to memory of 2112	2412	79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289.exe	31
PID 2092 wrote to memory of 2596	2092	taskeng.exe	34
PID 2092 wrote to memory of 2596	2092	taskeng.exe	34
PID 2092 wrote to memory of 2596	2092	taskeng.exe	34
PID 2092 wrote to memory of 2596	2092	taskeng.exe	34

C:\Users\Admin\AppData\Local\Temp\79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289.exe
"C:\Users\Admin\AppData\Local\Temp\79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2412
- C:\Users\Admin\AppData\Local\Temp\79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289.exe
  "C:\Users\Admin\AppData\Local\Temp\79b317bc068d59f1f94221b997f7314480b89cb6f90620b53ba8c29bf8974289.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:2752
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\SysWOW64\schtasks.exe" /create /tn SystemSettingsAdminFlows /tr "C:\Users\Admin\AppData\Roaming\UIMgrBroker\AboutSettingsHandlers.exe" /sc minute /mo 1 /F
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2112

C:\Windows\system32\taskeng.exe
taskeng.exe {A823D842-2C21-4341-B09F-92806394C3D7} S-1-5-21-3290804112-2823094203-3137964600-1000:VORHPBAB\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2092
- C:\Users\Admin\AppData\Roaming\UIMgrBroker\AboutSettingsHandlers.exe
  C:\Users\Admin\AppData\Roaming\UIMgrBroker\AboutSettingsHandlers.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:2596

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

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\Roaming\UIMgrBroker\AboutSettingsHandlers.exe

Filesize
1.1MB

MD5
8f439084b8ca24c9bb6462d4e704d42b

SHA1
ba59c902a7e434acc17c1855a9421bf9f6a76ba2

SHA256
b30bf01603fc42cec7cf06ce083b47675135e5ea40a11a3843a40d3301111184

SHA512
02bad7c3ed68afa701a7d56065a6f367f4c5c8a600688286d83802b8b490bfcc5b618c26a59ffb9325c975bb0d2e5e583f5eaf30b5478555deb0e32898d227fe

Download Submit
C:\Users\Admin\AppData\Roaming\remcos\logs.dat

Filesize
79B

MD5
7598c9d27e2940d4cb71380c4e6e75a7

SHA1
13cc22302af9cdf061fa495144d936bdda9363ac

SHA256
bf9ac6c902ad8494caa79fc5f4ab81ccdbd43947d765a58ecd5de293690323fd

SHA512
758c6828e21672b1f3d3c8213724717c12347cdf23421bfea5016ec3163ff838df197bbe5f72aba90c9d5d5a0bc75dcb7a9487131a2b891c6bb1c08414c941cc

Download Submit
memory/2412-20-0x0000000001220000-0x00000000013A9000-memory.dmp

Filesize
1.5MB

Download
memory/2412-0-0x0000000001220000-0x00000000013A9000-memory.dmp

Filesize
1.5MB

Download
memory/2412-2-0x0000000000600000-0x0000000000601000-memory.dmp

Filesize
4KB

Download
memory/2412-1-0x00000000000E0000-0x00000000000E3000-memory.dmp

Filesize
12KB

Download
memory/2412-25-0x0000000001220000-0x00000000013A9000-memory.dmp

Filesize
1.5MB

Download
memory/2596-32-0x0000000000BC0000-0x0000000000D49000-memory.dmp

Filesize
1.5MB

Download
memory/2752-16-0x0000000000070000-0x0000000000090000-memory.dmp

Filesize
128KB

Download
memory/2752-3-0x0000000000070000-0x0000000000090000-memory.dmp

Filesize
128KB

Download
memory/2752-15-0x0000000001220000-0x00000000013A9000-memory.dmp

Filesize
1.5MB

Download
memory/2752-14-0x0000000000070000-0x0000000000090000-memory.dmp

Filesize
128KB

Download
memory/2752-19-0x0000000000070000-0x0000000000090000-memory.dmp

Filesize
128KB

Download
memory/2752-11-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/2752-5-0x0000000000070000-0x0000000000090000-memory.dmp

Filesize
128KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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