remcos | 8f395dc9ca7802646cec0791fa6272449371c9ec9867448a004067f2a243d8ce

Reason

Machine shutdown

General

Target

msimg32.dll
Size

45.1MB
MD5

2b0cd6422137c4f1c4496305467b95c4
SHA1

a4ede1255abdda3fc27347fc46a0b3b9fd963972
SHA256

d9ffb32f33d1f16ca20346890449d410edb025a631f40b277c692474ba0c0318
SHA512

b1e8e238ccabf4be29d862d49191345a52310be178b1eb3b305cb2277877f948c14860a9fb95df1b93b6a01bb234217cc7cddedbd3ebdcd1e92b7ff05dd1a0a6
SSDEEP

786432:oUP7GCGO7t0Srkx/tC0SzIdSwh/WxbpNHQD3trzRp2:oUP7GCG6iSrkx1hSzYsHQD3t/RY

Score

10^/10

remcos remotehost rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

deytrycooldown.duckdns.org:7070

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-TYSCJG
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

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2456	regsvr32.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1676	2456	WerFault.exe	84

Modifies data under HKEY_USERS 15 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglowBalance = "10"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\StartColorMenu = "4288567808"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColorBalance = "89"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365271"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292311040"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColor = "3288365271"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationBlurBalance = "1"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "154"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent	LogonUI.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = a6d8ff0076b9ed00429ce3000078d700005a9e000042750000264200f7630c00	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History\AutoColor = "0"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\AccentColor = "4292311040"	LogonUI.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeShutdownPrivilege	2464	regsvr32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
220	LogonUI.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2876 wrote to memory of 2456	2876	regsvr32.exe	84
PID 2876 wrote to memory of 2456	2876	regsvr32.exe	84
PID 2876 wrote to memory of 2456	2876	regsvr32.exe	84
PID 2456 wrote to memory of 2464	2456	regsvr32.exe	95
PID 2456 wrote to memory of 2464	2456	regsvr32.exe	95
PID 2456 wrote to memory of 2464	2456	regsvr32.exe	95
PID 2456 wrote to memory of 2464	2456	regsvr32.exe	95
PID 2456 wrote to memory of 2464	2456	regsvr32.exe	95
PID 2456 wrote to memory of 2464	2456	regsvr32.exe	95

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\msimg32.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:2876
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\msimg32.dll
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of WriteProcessMemory
  PID:2456
- - C:\Windows\SysWOW64\regsvr32.exe
    "C:\Windows\SysWOW64\regsvr32.exe"
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:2464
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2456 -s 800
    3⤵
    - Program crash
    PID:1676

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2456 -ip 2456
1⤵
PID:2260

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x4 /state0:0xa38c1855 /state1:0x41c64e6d
1⤵
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:220

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

memory/2456-0-0x0000000010000000-0x0000000012DD5000-memory.dmp

Filesize
45.8MB

Download
memory/2456-1-0x00000000102E6000-0x0000000010300000-memory.dmp

Filesize
104KB

Download
memory/2456-9-0x0000000010000000-0x0000000012DD5000-memory.dmp

Filesize
45.8MB

Download
memory/2464-12-0x0000000000A00000-0x0000000000A82000-memory.dmp

Filesize
520KB

Download
memory/2464-16-0x0000000000A00000-0x0000000000A82000-memory.dmp

Filesize
520KB

Download
memory/2464-7-0x0000000000A00000-0x0000000000A82000-memory.dmp

Filesize
520KB

Download
memory/2464-8-0x0000000000A00000-0x0000000000A82000-memory.dmp

Filesize
520KB

Download
memory/2464-5-0x0000000000A00000-0x0000000000A82000-memory.dmp

Filesize
520KB

Download
memory/2464-11-0x0000000000A00000-0x0000000000A82000-memory.dmp

Filesize
520KB

Download
memory/2464-10-0x0000000000A00000-0x0000000000A82000-memory.dmp

Filesize
520KB

Download
memory/2464-2-0x0000000000A90000-0x0000000000A91000-memory.dmp

Filesize
4KB

Download
memory/2464-15-0x0000000000A00000-0x0000000000A82000-memory.dmp

Filesize
520KB

Download
memory/2464-4-0x0000000000A00000-0x0000000000A82000-memory.dmp

Filesize
520KB

Download
memory/2464-17-0x0000000000A00000-0x0000000000A82000-memory.dmp

Filesize
520KB

Download
memory/2464-18-0x0000000000A00000-0x0000000000A82000-memory.dmp

Filesize
520KB

Download
memory/2464-19-0x0000000000A00000-0x0000000000A82000-memory.dmp

Filesize
520KB

Download
memory/2464-20-0x0000000000A00000-0x0000000000A82000-memory.dmp

Filesize
520KB

Download
memory/2464-21-0x0000000000A00000-0x0000000000A82000-memory.dmp

Filesize
520KB

Download
memory/2464-22-0x0000000000A00000-0x0000000000A82000-memory.dmp

Filesize
520KB

Download
memory/2464-23-0x0000000000A00000-0x0000000000A82000-memory.dmp

Filesize
520KB

Download
memory/2464-25-0x0000000000A00000-0x0000000000A82000-memory.dmp

Filesize
520KB

Download

Analysis

Sharing

Errors