remcos | a16aadc16fa7b3e1d90470f3780e9b4e71a0eab9862a92cf0fa9de1a20076576

Analysis

max time kernel
92s
max time network
133s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
17-09-2024 13:51

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General

Target

e6f613141f103596ab5347f23d816ab3_JaffaCakes118.ps1
Size

478KB
MD5

e6f613141f103596ab5347f23d816ab3
SHA1

44a27e3b48a644d67b184c755a4038708a3bda02
SHA256

a16aadc16fa7b3e1d90470f3780e9b4e71a0eab9862a92cf0fa9de1a20076576
SHA512

e3e168946b74b0e273e8459e23ad16cee648b6c9c5c832541b6eef699c9a22fb5575acc971dc01397b167a798338ef6fa56aea4523ad08473bc6c184ec634bd0
SSDEEP

6144:jkadKG+Emf0341hM72QsbZ6eU1pY/k4XonOf3Qc5H0:jkNEmf03uhMRst6erwOfd5U

Score

10^/10

remcos zeus defense_evasion discovery execution persistence rat

Malware Config

Extracted

Family

remcos

Version

2.4.7 Pro

Botnet

ZEUS

top.multigamingjo.waw.pl:3090

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
ZEUS-0LFWTS
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
wikipedia;solitaire;

Signatures

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

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-355097885-2402257403-2971294179-1000\Control Panel\International\Geo\Nation	gdy.exe
Key value queried	\REGISTRY\USER\S-1-5-21-355097885-2402257403-2971294179-1000\Control Panel\International\Geo\Nation	outext.exe

Executes dropped EXE 3 IoCs

pid	Process
5012	gdy.exe
3724	outext.exe
2036	outext.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-355097885-2402257403-2971294179-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\outext = "C:\\Users\\Admin\\AppData\\Local\\outext.exe -boot"	outext.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3724 set thread context of 2036	3724	outext.exe	104

Subvert Trust Controls: Mark-of-the-Web Bypass 1 TTPs 2 IoCs

When files are downloaded from the Internet, they are tagged with a hidden NTFS Alternate Data Stream (ADS) named Zone.Identifier with a specific value known as the MOTW.

defense_evasion

SIP and Trust Provider Hijacking

T1553.003

description	ioc	Process
File created	C:\Users\Public\gdy.exe:Zone.Identifier	cmd.exe
File opened for modification	C:\Users\Admin\AppData\Local\outext.exe:Zone.Identifier	cmd.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
4944	powershell.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2428	2036	WerFault.exe	104

System Location Discovery: System Language Discovery 1 TTPs 6 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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	outext.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	gdy.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

NTFS ADS 3 IoCs

description	ioc	Process
File created	C:\Users\Public\gdy.exe:Zone.Identifier	cmd.exe
File created	C:\Users\Admin\AppData\Local\outext.exe\:Zone.Identifier:$DATA	cmd.exe
File opened for modification	C:\Users\Admin\AppData\Local\outext.exe:Zone.Identifier	cmd.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4944	powershell.exe
4944	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4944	powershell.exe
Token: SeDebugPrivilege	5012	gdy.exe
Token: SeDebugPrivilege	3724	outext.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 4944 wrote to memory of 5012	4944	powershell.exe	85
PID 4944 wrote to memory of 5012	4944	powershell.exe	85
PID 4944 wrote to memory of 5012	4944	powershell.exe	85
PID 5012 wrote to memory of 3460	5012	gdy.exe	93
PID 5012 wrote to memory of 3460	5012	gdy.exe	93
PID 5012 wrote to memory of 3460	5012	gdy.exe	93
PID 5012 wrote to memory of 3920	5012	gdy.exe	96
PID 5012 wrote to memory of 3920	5012	gdy.exe	96
PID 5012 wrote to memory of 3920	5012	gdy.exe	96
PID 5012 wrote to memory of 3024	5012	gdy.exe	99
PID 5012 wrote to memory of 3024	5012	gdy.exe	99
PID 5012 wrote to memory of 3024	5012	gdy.exe	99
PID 3024 wrote to memory of 3724	3024	cmd.exe	101
PID 3024 wrote to memory of 3724	3024	cmd.exe	101
PID 3024 wrote to memory of 3724	3024	cmd.exe	101
PID 3724 wrote to memory of 1216	3724	outext.exe	102
PID 3724 wrote to memory of 1216	3724	outext.exe	102
PID 3724 wrote to memory of 1216	3724	outext.exe	102
PID 3724 wrote to memory of 2036	3724	outext.exe	104
PID 3724 wrote to memory of 2036	3724	outext.exe	104
PID 3724 wrote to memory of 2036	3724	outext.exe	104
PID 3724 wrote to memory of 2036	3724	outext.exe	104
PID 3724 wrote to memory of 2036	3724	outext.exe	104
PID 3724 wrote to memory of 2036	3724	outext.exe	104
PID 3724 wrote to memory of 2036	3724	outext.exe	104
PID 3724 wrote to memory of 2036	3724	outext.exe	104
PID 3724 wrote to memory of 2036	3724	outext.exe	104
PID 3724 wrote to memory of 2036	3724	outext.exe	104

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\e6f613141f103596ab5347f23d816ab3_JaffaCakes118.ps1
1⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4944
- C:\Users\Public\gdy.exe
  "C:\Users\Public\gdy.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:5012
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /C type nul > "C:\Users\Public\gdy.exe:Zone.Identifier"
    3⤵
    - Subvert Trust Controls: Mark-of-the-Web Bypass
    - System Location Discovery: System Language Discovery
    - NTFS ADS
    PID:3460
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c copy "C:\Users\Public\gdy.exe" "C:\Users\Admin\AppData\Local\outext.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - NTFS ADS
    PID:3920
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c, "C:\Users\Admin\AppData\Local\outext.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3024
  - - C:\Users\Admin\AppData\Local\outext.exe
      "C:\Users\Admin\AppData\Local\outext.exe"
      4⤵
      Checks computer location settings
      Executes dropped EXE
      Adds Run key to start application
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:3724
    - - C:\Windows\SysWOW64\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C type nul > "C:\Users\Admin\AppData\Local\outext.exe:Zone.Identifier"
        5⤵
        Subvert Trust Controls: Mark-of-the-Web Bypass
        System Location Discovery: System Language Discovery
        NTFS ADS
        
        PID:1216
    - - C:\Users\Admin\AppData\Local\outext.exe
        
        C:\Users\Admin\AppData\Local\outext.exe
        5⤵
        Executes dropped EXE
        
        PID:2036
      - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 2036 -s 504
        6⤵
        Program crash
        
        PID:2428

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 2036 -ip 2036
1⤵
PID:4904

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Subvert Trust Controls

T1553

SIP and Trust Provider Hijacking

T1553.003

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_twlafalx.dmg.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Public\gdy.exe

Filesize
342KB

MD5
807924d305c39afe400a361e77f8c46e

SHA1
1f47e813a3a09dcccb9dc7880a38e507361bb3ea

SHA256
3191348a4fe34b9380c79b4d030ab921e54eff9c4d6599bc0fae45a4068416cb

SHA512
a6262d42d7ea68ef0b83bc0b52cfbc4b810dc09c5b6628b2194997ec23b26912627dd605c3ef870659fd404ac274ebec95b6b008a2f038566ca04947b331ccbb

Download Submit
memory/2036-48-0x0000000000800000-0x0000000000820000-memory.dmp

Filesize
128KB

Download
memory/2036-45-0x0000000000800000-0x0000000000820000-memory.dmp

Filesize
128KB

Download
memory/3724-41-0x00000000063C0000-0x000000000645C000-memory.dmp

Filesize
624KB

Download
memory/3724-40-0x0000000002510000-0x0000000002536000-memory.dmp

Filesize
152KB

Download
memory/4944-0-0x00007FFEA9F43000-0x00007FFEA9F45000-memory.dmp

Filesize
8KB

Download
memory/4944-1-0x000001E334CB0000-0x000001E334CD2000-memory.dmp

Filesize
136KB

Download
memory/4944-11-0x00007FFEA9F40000-0x00007FFEAAA01000-memory.dmp

Filesize
10.8MB

Download
memory/4944-12-0x00007FFEA9F40000-0x00007FFEAAA01000-memory.dmp

Filesize
10.8MB

Download
memory/4944-19-0x00007FFEA9F40000-0x00007FFEAAA01000-memory.dmp

Filesize
10.8MB

Download
memory/5012-25-0x0000000004EF0000-0x0000000004F82000-memory.dmp

Filesize
584KB

Download
memory/5012-24-0x0000000074B4E000-0x0000000074B4F000-memory.dmp

Filesize
4KB

Download
memory/5012-26-0x0000000004F90000-0x0000000004FF6000-memory.dmp

Filesize
408KB

Download
memory/5012-27-0x0000000004E90000-0x0000000004EB2000-memory.dmp

Filesize
136KB

Download
memory/5012-28-0x00000000051D0000-0x0000000005392000-memory.dmp

Filesize
1.8MB

Download
memory/5012-29-0x0000000074B40000-0x00000000752F0000-memory.dmp

Filesize
7.7MB

Download
memory/5012-30-0x00000000062E0000-0x0000000006884000-memory.dmp

Filesize
5.6MB

Download
memory/5012-31-0x0000000074B40000-0x00000000752F0000-memory.dmp

Filesize
7.7MB

Download
memory/5012-36-0x0000000074B40000-0x00000000752F0000-memory.dmp

Filesize
7.7MB

Download
memory/5012-23-0x0000000001010000-0x0000000001036000-memory.dmp

Filesize
152KB

Download
memory/5012-22-0x0000000004E20000-0x0000000004E42000-memory.dmp

Filesize
136KB

Download
memory/5012-21-0x0000000000600000-0x000000000065C000-memory.dmp

Filesize
368KB

Download
memory/5012-20-0x0000000074B4E000-0x0000000074B4F000-memory.dmp

Filesize
4KB

Download