remcos | 0c3d4871dc7316ae787156a859c22edfd6876458295e5350a6ed09f72e8b2e19

Analysis

max time kernel
148s
max time network
149s
platform
windows10_x64
resource
win10-en-20210920
submitted
06/10/2021, 07:30

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General

Target
INV.DHL202,PDF.exe
Size 714KB
Sample211006-jbwpcaaga5
SHA256 0c3d4871dc7316ae787156a859c22edfd6876458295e5350a6ed09f72e8b2e19
MD5 a78e43d98ed0c74651d35be3ac010a9e
SHA1 52515307d1edfcc0f1a47ba22f3f3a2930257422
SHA512 2600831827f6843e8fd4193635554e626f643c953cf8325d9c2fdad23af792e08bd0ec181060cf33071310bc11f68f71f9bf4acbc589627afe932a1160661e43
MD5 SHA1 SHA512

Score

10^/10

remcos biz logs persistence rat

Malware Config

Extracted

Family

remcos

Version

3.2.1 Pro

Botnet

Biz Logs

blessthychild.hopto.org:6344

Attributes

audio_folder
MicRecords
audio_path
%AppData%
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
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
Remcos-Y73HNI
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
take_screenshot_title
notepad;solitaire;

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2481030822-2828258191-1606198294-1000\Software\Microsoft\Windows\CurrentVersion\Run\Zhgsbxj = "C:\\Users\\Public\\Libraries\\jxbsghZ.url"	INV.DHL202,PDF.exe

Modifies registry key 1 TTPs 3 IoCs

Modify Registry

T1112

pid	Process
368	reg.exe
3284	reg.exe
412	reg.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 2472 wrote to memory of 3680	2472	INV.DHL202,PDF.exe	70
PID 2472 wrote to memory of 3680	2472	INV.DHL202,PDF.exe	70
PID 2472 wrote to memory of 3680	2472	INV.DHL202,PDF.exe	70
PID 2472 wrote to memory of 3680	2472	INV.DHL202,PDF.exe	70
PID 2472 wrote to memory of 3680	2472	INV.DHL202,PDF.exe	70
PID 2472 wrote to memory of 3680	2472	INV.DHL202,PDF.exe	70
PID 2472 wrote to memory of 3680	2472	INV.DHL202,PDF.exe	70
PID 2472 wrote to memory of 3680	2472	INV.DHL202,PDF.exe	70
PID 2472 wrote to memory of 3680	2472	INV.DHL202,PDF.exe	70
PID 2472 wrote to memory of 3680	2472	INV.DHL202,PDF.exe	70
PID 2472 wrote to memory of 3680	2472	INV.DHL202,PDF.exe	70
PID 2472 wrote to memory of 3680	2472	INV.DHL202,PDF.exe	70
PID 2472 wrote to memory of 3680	2472	INV.DHL202,PDF.exe	70
PID 2472 wrote to memory of 3680	2472	INV.DHL202,PDF.exe	70
PID 2472 wrote to memory of 3680	2472	INV.DHL202,PDF.exe	70
PID 2472 wrote to memory of 2596	2472	INV.DHL202,PDF.exe	71
PID 2472 wrote to memory of 2596	2472	INV.DHL202,PDF.exe	71
PID 2472 wrote to memory of 2596	2472	INV.DHL202,PDF.exe	71
PID 2596 wrote to memory of 3984	2596	cmd.exe	73
PID 2596 wrote to memory of 3984	2596	cmd.exe	73
PID 2596 wrote to memory of 3984	2596	cmd.exe	73
PID 3984 wrote to memory of 412	3984	cmd.exe	75
PID 3984 wrote to memory of 412	3984	cmd.exe	75
PID 3984 wrote to memory of 412	3984	cmd.exe	75
PID 3984 wrote to memory of 368	3984	cmd.exe	76
PID 3984 wrote to memory of 368	3984	cmd.exe	76
PID 3984 wrote to memory of 368	3984	cmd.exe	76
PID 3984 wrote to memory of 1040	3984	cmd.exe	77
PID 3984 wrote to memory of 1040	3984	cmd.exe	77
PID 3984 wrote to memory of 1040	3984	cmd.exe	77
PID 2472 wrote to memory of 1264	2472	INV.DHL202,PDF.exe	78
PID 2472 wrote to memory of 1264	2472	INV.DHL202,PDF.exe	78
PID 2472 wrote to memory of 1264	2472	INV.DHL202,PDF.exe	78
PID 1264 wrote to memory of 3284	1264	cmd.exe	80
PID 1264 wrote to memory of 3284	1264	cmd.exe	80
PID 1264 wrote to memory of 3284	1264	cmd.exe	80

C:\Users\Admin\AppData\Local\Temp\INV.DHL202,PDF.exe
"C:\Users\Admin\AppData\Local\Temp\INV.DHL202,PDF.exe"
1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2472
- C:\Windows\SysWOW64\secinit.exe
  C:\Windows\System32\secinit.exe
  2⤵
  PID:3680
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Public\Trast.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2596
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /K C:\Users\Public\UKO.bat
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3984
  - - C:\Windows\SysWOW64\reg.exe
      reg delete hkcu\Environment /v windir /f
      4⤵
      Modifies registry key
      PID:412
  - - C:\Windows\SysWOW64\reg.exe
      reg add hkcu\Environment /v windir /d "cmd /c start /min C:\Users\Public\KDECO.bat reg delete hkcu\Environment /v windir /f && REM "
      4⤵
      Modifies registry key
      PID:368
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /Run /TN \Microsoft\Windows\DiskCleanup\SilentCleanup /I
      4⤵
      PID:1040
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Public\nest.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1264
- - C:\Windows\SysWOW64\reg.exe
    reg delete hkcu\Environment /v windir /f
    3⤵
    - Modifies registry key
    PID:3284

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/2472-115-0x0000000000780000-0x0000000000781000-memory.dmp

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memory/3680-120-0x00000000032F0000-0x00000000032F1000-memory.dmp

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memory/3680-119-0x0000000003290000-0x0000000003291000-memory.dmp

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memory/3680-123-0x0000000000400000-0x0000000000479000-memory.dmp

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memory/3680-122-0x0000000002FD0000-0x0000000002FD1000-memory.dmp

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memory/3680-121-0x0000000073F80000-0x0000000073FFC000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads