remcos | bf7843608d1b1c3fee60bf8fd4a9410047c8ef059ed1e55e018da081670159c5

Analysis

max time kernel
163s
max time network
169s
platform
windows10-2004_x64
resource
win10v2004-20220310-en
submitted
25/03/2022, 18:14

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General

Target
DHL_229040 receipt document,pdf.exe
Size 1.0MB
Sample220325-wvddbsbae2
SHA256 bf7843608d1b1c3fee60bf8fd4a9410047c8ef059ed1e55e018da081670159c5
MD5 147366a55f359f5d30b88b412c7ff718
SHA1 49d4372a331835f92c7e14db628205410726f4fa
SHA512 7d166681f845a74cca27022082f64d0e62aa8f537f8f6c696b011c629170ca1507b0b891f1ec078ed27fa0b8b3f75ab6f6ec394a25552e822dc8c559b13fd936
MD5 SHA1 SHA512

Score

10^/10

remcos kelvsy persistence rat

Malware Config

Extracted

Family

remcos

Version

3.2.1 Pro

Botnet

KELVSY

boysgoblow.hopto.org:7838

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-QTBVOQ
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-1-5-21-2403053463-4052593947-3703345493-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Scbmejo = "C:\\Users\\Public\\ojembcS.url"	DHL_229040 receipt document,pdf.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3692	powershell.exe
3692	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3692	powershell.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1368 wrote to memory of 1084	1368	DHL_229040 receipt document,pdf.exe	103
PID 1368 wrote to memory of 1084	1368	DHL_229040 receipt document,pdf.exe	103
PID 1368 wrote to memory of 1084	1368	DHL_229040 receipt document,pdf.exe	103
PID 1368 wrote to memory of 1084	1368	DHL_229040 receipt document,pdf.exe	103
PID 1368 wrote to memory of 1084	1368	DHL_229040 receipt document,pdf.exe	103
PID 1368 wrote to memory of 1084	1368	DHL_229040 receipt document,pdf.exe	103
PID 1368 wrote to memory of 1084	1368	DHL_229040 receipt document,pdf.exe	103
PID 1368 wrote to memory of 1084	1368	DHL_229040 receipt document,pdf.exe	103
PID 1368 wrote to memory of 1084	1368	DHL_229040 receipt document,pdf.exe	103
PID 1368 wrote to memory of 1084	1368	DHL_229040 receipt document,pdf.exe	103
PID 1368 wrote to memory of 1084	1368	DHL_229040 receipt document,pdf.exe	103
PID 1368 wrote to memory of 1084	1368	DHL_229040 receipt document,pdf.exe	103
PID 1368 wrote to memory of 1084	1368	DHL_229040 receipt document,pdf.exe	103
PID 1368 wrote to memory of 1084	1368	DHL_229040 receipt document,pdf.exe	103
PID 1368 wrote to memory of 1084	1368	DHL_229040 receipt document,pdf.exe	103
PID 1368 wrote to memory of 2440	1368	DHL_229040 receipt document,pdf.exe	104
PID 1368 wrote to memory of 2440	1368	DHL_229040 receipt document,pdf.exe	104
PID 1368 wrote to memory of 2440	1368	DHL_229040 receipt document,pdf.exe	104
PID 2440 wrote to memory of 4232	2440	cmd.exe	106
PID 2440 wrote to memory of 4232	2440	cmd.exe	106
PID 2440 wrote to memory of 4232	2440	cmd.exe	106
PID 4232 wrote to memory of 2736	4232	cmd.exe	108
PID 4232 wrote to memory of 2736	4232	cmd.exe	108
PID 4232 wrote to memory of 2736	4232	cmd.exe	108
PID 2736 wrote to memory of 2376	2736	net.exe	109
PID 2736 wrote to memory of 2376	2736	net.exe	109
PID 2736 wrote to memory of 2376	2736	net.exe	109
PID 4232 wrote to memory of 3692	4232	cmd.exe	110
PID 4232 wrote to memory of 3692	4232	cmd.exe	110
PID 4232 wrote to memory of 3692	4232	cmd.exe	110

C:\Users\Admin\AppData\Local\Temp\DHL_229040 receipt document,pdf.exe
"C:\Users\Admin\AppData\Local\Temp\DHL_229040 receipt document,pdf.exe"
1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1368
- C:\Windows\SysWOW64\logagent.exe
  C:\Windows\System32\logagent.exe
  2⤵
  PID:1084
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Public\Scbmejot.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2440
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /K C:\Users\Public\ScbmejoO.bat
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4232
  - - C:\Windows\SysWOW64\net.exe
      net session
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2736
    - - C:\Windows\SysWOW64\net1.exe
        
        C:\Windows\system32\net1 session
        5⤵
        
        PID:2376
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      powershell -WindowStyle Hidden -inputformat none -outputformat none -NonInteractive -Command "Add-MpPreference -ExclusionPath 'C:\Users'"
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:3692

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

Replay Monitor

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Downloads

memory/1084-136-0x0000000010590000-0x000000001060C000-memory.dmp

Download

memory/1084-141-0x0000000000400000-0x0000000000479000-memory.dmp

Download

memory/3692-147-0x0000000005230000-0x0000000005858000-memory.dmp

Download

memory/3692-146-0x0000000002650000-0x0000000002686000-memory.dmp

Download

memory/3692-148-0x0000000004EB0000-0x0000000004ED2000-memory.dmp

Download

memory/3692-149-0x0000000005150000-0x00000000051B6000-memory.dmp

Download

memory/3692-150-0x00000000058D0000-0x0000000005936000-memory.dmp

Download

memory/3692-151-0x0000000005E50000-0x0000000005E6E000-memory.dmp

Download

memory/3692-152-0x0000000002625000-0x0000000002627000-memory.dmp

Download