remcos | 687fac8ea1cfe53efd98ae25b17da41e88603a8c8a3ada71fad837acd97a6533

General

Target

SPT _ORDER 5676-SEPT1521,pdf,pdf.exe
Size

783KB
MD5

a83ce04c71214b48d3f559a4bc310ed1
SHA1

99738e4db2d511683ab182af71f5f81910c0f300
SHA256

687fac8ea1cfe53efd98ae25b17da41e88603a8c8a3ada71fad837acd97a6533
SHA512

d12e0d5e69a4fe9d635b5a42685f79f3d95bde8af4dbf0fddee8e36f87359a59829e4650d5d905d8f15d5900b8c7b15913e812bfaf65993ebd6acb80df4c27a6

Score

10^/10

remcos ok man persistence rat

Malware Config

Extracted

Family

remcos

Version

3.1.5 Pro

Botnet

OK MAN

C2

zion6.ddns.net:2815

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-MPN2RF
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

Processes:

SPT _ORDER 5676-SEPT1521,pdf,pdf.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2559286294-2439613352-4032193287-1000\Software\Microsoft\Windows\CurrentVersion\Run\Ksdfhzle = "C:\\Users\\Public\\Libraries\\elzhfdsK.url"	SPT _ORDER 5676-SEPT1521,pdf,pdf.exe

Modifies registry key 1 TTPs 3 IoCs

Modify Registry
T1112

Processes:

reg.exereg.exereg.exe

pid process

636 reg.exe
1168 reg.exe
500 reg.exe

pid	process
636	reg.exe
1168	reg.exe
500	reg.exe

Suspicious use of WriteProcessMemory 36 IoCs

Processes:

SPT _ORDER 5676-SEPT1521,pdf,pdf.execmd.execmd.execmd.exe

description	pid	process	target process
PID 3908 wrote to memory of 2592	3908	SPT _ORDER 5676-SEPT1521,pdf,pdf.exe	secinit.exe
PID 3908 wrote to memory of 2592	3908	SPT _ORDER 5676-SEPT1521,pdf,pdf.exe	secinit.exe
PID 3908 wrote to memory of 2592	3908	SPT _ORDER 5676-SEPT1521,pdf,pdf.exe	secinit.exe
PID 3908 wrote to memory of 2592	3908	SPT _ORDER 5676-SEPT1521,pdf,pdf.exe	secinit.exe
PID 3908 wrote to memory of 2592	3908	SPT _ORDER 5676-SEPT1521,pdf,pdf.exe	secinit.exe
PID 3908 wrote to memory of 2592	3908	SPT _ORDER 5676-SEPT1521,pdf,pdf.exe	secinit.exe
PID 3908 wrote to memory of 2592	3908	SPT _ORDER 5676-SEPT1521,pdf,pdf.exe	secinit.exe
PID 3908 wrote to memory of 2592	3908	SPT _ORDER 5676-SEPT1521,pdf,pdf.exe	secinit.exe
PID 3908 wrote to memory of 2592	3908	SPT _ORDER 5676-SEPT1521,pdf,pdf.exe	secinit.exe
PID 3908 wrote to memory of 2592	3908	SPT _ORDER 5676-SEPT1521,pdf,pdf.exe	secinit.exe
PID 3908 wrote to memory of 2592	3908	SPT _ORDER 5676-SEPT1521,pdf,pdf.exe	secinit.exe
PID 3908 wrote to memory of 2592	3908	SPT _ORDER 5676-SEPT1521,pdf,pdf.exe	secinit.exe
PID 3908 wrote to memory of 2592	3908	SPT _ORDER 5676-SEPT1521,pdf,pdf.exe	secinit.exe
PID 3908 wrote to memory of 2592	3908	SPT _ORDER 5676-SEPT1521,pdf,pdf.exe	secinit.exe
PID 3908 wrote to memory of 2592	3908	SPT _ORDER 5676-SEPT1521,pdf,pdf.exe	secinit.exe
PID 3908 wrote to memory of 3156	3908	SPT _ORDER 5676-SEPT1521,pdf,pdf.exe	cmd.exe
PID 3908 wrote to memory of 3156	3908	SPT _ORDER 5676-SEPT1521,pdf,pdf.exe	cmd.exe
PID 3908 wrote to memory of 3156	3908	SPT _ORDER 5676-SEPT1521,pdf,pdf.exe	cmd.exe
PID 3156 wrote to memory of 3852	3156	cmd.exe	cmd.exe
PID 3156 wrote to memory of 3852	3156	cmd.exe	cmd.exe
PID 3156 wrote to memory of 3852	3156	cmd.exe	cmd.exe
PID 3852 wrote to memory of 500	3852	cmd.exe	reg.exe
PID 3852 wrote to memory of 500	3852	cmd.exe	reg.exe
PID 3852 wrote to memory of 500	3852	cmd.exe	reg.exe
PID 3852 wrote to memory of 636	3852	cmd.exe	reg.exe
PID 3852 wrote to memory of 636	3852	cmd.exe	reg.exe
PID 3852 wrote to memory of 636	3852	cmd.exe	reg.exe
PID 3852 wrote to memory of 812	3852	cmd.exe	schtasks.exe
PID 3852 wrote to memory of 812	3852	cmd.exe	schtasks.exe
PID 3852 wrote to memory of 812	3852	cmd.exe	schtasks.exe
PID 3908 wrote to memory of 372	3908	SPT _ORDER 5676-SEPT1521,pdf,pdf.exe	cmd.exe
PID 3908 wrote to memory of 372	3908	SPT _ORDER 5676-SEPT1521,pdf,pdf.exe	cmd.exe
PID 3908 wrote to memory of 372	3908	SPT _ORDER 5676-SEPT1521,pdf,pdf.exe	cmd.exe
PID 372 wrote to memory of 1168	372	cmd.exe	reg.exe
PID 372 wrote to memory of 1168	372	cmd.exe	reg.exe
PID 372 wrote to memory of 1168	372	cmd.exe	reg.exe

C:\Users\Admin\AppData\Local\Temp\SPT _ORDER 5676-SEPT1521,pdf,pdf.exe
"C:\Users\Admin\AppData\Local\Temp\SPT _ORDER 5676-SEPT1521,pdf,pdf.exe"
1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:3908
- C:\Windows\SysWOW64\secinit.exe
  C:\Windows\System32\secinit.exe
  2⤵
  PID:2592
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Public\Trast.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3156
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /K C:\Users\Public\UKO.bat
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3852
  - - C:\Windows\SysWOW64\reg.exe
      reg delete hkcu\Environment /v windir /f
      4⤵
      Modifies registry key
      PID:500
  - - 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:636
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /Run /TN \Microsoft\Windows\DiskCleanup\SilentCleanup /I
      4⤵
      PID:812
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Public\nest.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:372
- - C:\Windows\SysWOW64\reg.exe
    reg delete hkcu\Environment /v windir /f
    3⤵
    - Modifies registry key
    PID:1168

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Public\Trast.bat

MD5
4068c9f69fcd8a171c67f81d4a952a54

SHA1
4d2536a8c28cdcc17465e20d6693fb9e8e713b36

SHA256
24222300c78180b50ed1f8361ba63cb27316ec994c1c9079708a51b4a1a9d810

SHA512
a64f9319acc51fffd0491c74dcd9c9084c2783b82f95727e4bfe387a8528c6dcf68f11418e88f1e133d115daf907549c86dd7ad866b2a7938add5225fbb2811d

Download Submit
C:\Users\Public\UKO.bat

MD5
eaf8d967454c3bbddbf2e05a421411f8

SHA1
6170880409b24de75c2dc3d56a506fbff7f6622c

SHA256
f35f2658455a2e40f151549a7d6465a836c33fa9109e67623916f889849eac56

SHA512
fe5be5c673e99f70c93019d01abb0a29dd2ecf25b2d895190ff551f020c28e7d8f99f65007f440f0f76c5bcac343b2a179a94d190c938ea3b9e1197890a412e9

Download Submit
C:\Users\Public\nest.bat

MD5
8ada51400b7915de2124baaf75e3414c

SHA1
1a7b9db12184ab7fd7fce1c383f9670a00adb081

SHA256
45aa3957c29865260a78f03eef18ae9aebdbf7bea751ecc88be4a799f2bb46c7

SHA512
9afc138157a4565294ca49942579cdb6f5d8084e56f9354738de62b585f4c0fa3e7f2cbc9541827f2084e3ff36c46eed29b46f5dd2444062ffcd05c599992e68

Download Submit
memory/372-132-0x0000000000000000-mapping.dmp

Download
memory/500-124-0x0000000000000000-mapping.dmp

Download
memory/636-125-0x0000000000000000-mapping.dmp

Download
memory/812-126-0x0000000000000000-mapping.dmp

Download
memory/1168-134-0x0000000000000000-mapping.dmp

Download
memory/2592-129-0x0000000010590000-0x000000001060C000-memory.dmp

Filesize
496KB

Download
memory/2592-128-0x0000000000A20000-0x0000000000A21000-memory.dmp

Filesize
4KB

Download
memory/2592-127-0x00000000009C0000-0x00000000009C1000-memory.dmp

Filesize
4KB

Download
memory/2592-130-0x0000000000900000-0x0000000000901000-memory.dmp

Filesize
4KB

Download
memory/2592-131-0x0000000000400000-0x0000000000479000-memory.dmp

Filesize
484KB

Download
memory/2592-119-0x0000000000000000-mapping.dmp

Download
memory/3156-120-0x0000000000000000-mapping.dmp

Download
memory/3852-122-0x0000000000000000-mapping.dmp

Download
memory/3908-118-0x00000000020C0000-0x00000000020C1000-memory.dmp

Filesize
4KB

Download

Analysis

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