ef168674c305600b8279fd18ec8144139dcf53388a6d393007721110c2ec4934

Analysis

max time kernel
133s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
26/07/2024, 02:48

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General

Target

2024-07-26_16a3046cf90d283dee87c7ae3d9ee6fc_bkransomware.exe
Size

518KB
MD5

16a3046cf90d283dee87c7ae3d9ee6fc
SHA1

9b39166c15055f7d143da99cd1bbaa5279d8817d
SHA256

ef168674c305600b8279fd18ec8144139dcf53388a6d393007721110c2ec4934
SHA512

54f1beb78430e85e5de9a314c5839f14d761c8bc43666e3dd9e9e2a6ee7c7bb53f00d1bd370258bc0543963da421669740e0e97dadea4bb1e0cd03e79b2036d0
SSDEEP

12288:hS0x/sruhF2lcEbdhtjxlELOvN6boVeDufWHhwMRSjYe:DJkoF2ueFjN6boVyhRqh

Score

7^/10

discovery persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
2876	e3Z16LwfhChYNoy.exe
4568	CTS.exe

Reads user/profile data of web browsers 2 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

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\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	CTS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-07-26_16a3046cf90d283dee87c7ae3d9ee6fc_bkransomware.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\CTS.exe	2024-07-26_16a3046cf90d283dee87c7ae3d9ee6fc_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

System Location Discovery: System Language Discovery 1 TTPs 3 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	2024-07-26_16a3046cf90d283dee87c7ae3d9ee6fc_bkransomware.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	CTS.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e3Z16LwfhChYNoy.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3228	2024-07-26_16a3046cf90d283dee87c7ae3d9ee6fc_bkransomware.exe
Token: SeDebugPrivilege	4568	CTS.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3228 wrote to memory of 2876	3228	2024-07-26_16a3046cf90d283dee87c7ae3d9ee6fc_bkransomware.exe	84
PID 3228 wrote to memory of 2876	3228	2024-07-26_16a3046cf90d283dee87c7ae3d9ee6fc_bkransomware.exe	84
PID 3228 wrote to memory of 2876	3228	2024-07-26_16a3046cf90d283dee87c7ae3d9ee6fc_bkransomware.exe	84
PID 3228 wrote to memory of 4568	3228	2024-07-26_16a3046cf90d283dee87c7ae3d9ee6fc_bkransomware.exe	85
PID 3228 wrote to memory of 4568	3228	2024-07-26_16a3046cf90d283dee87c7ae3d9ee6fc_bkransomware.exe	85
PID 3228 wrote to memory of 4568	3228	2024-07-26_16a3046cf90d283dee87c7ae3d9ee6fc_bkransomware.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-07-26_16a3046cf90d283dee87c7ae3d9ee6fc_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-07-26_16a3046cf90d283dee87c7ae3d9ee6fc_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3228
- C:\Users\Admin\AppData\Local\Temp\e3Z16LwfhChYNoy.exe
  C:\Users\Admin\AppData\Local\Temp\e3Z16LwfhChYNoy.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:2876
- C:\Windows\CTS.exe
  "C:\Windows\CTS.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:4568

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

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\Microsoft\Office\16.0\excel.exe_Rules.xml

Filesize
392KB

MD5
ce4b4ab1b33f960fe694493eed446dfb

SHA1
bbc504d03484a6b5c2c878ed92c24b1bd2d0f5cf

SHA256
caf7a2387566d02e22f3e910c68019dfa1b2d6951a95c6dacfe66a5777dc1386

SHA512
850c1592f797a7aef5343e35a5d6163edc39728490fbc90f7967f563748e9ad1acc376147114e6e9ae9dac5df0df102a2495ab5e5743406bd99b46774a5597bc

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C:\Users\Admin\AppData\Local\Temp\e3Z16LwfhChYNoy.exe

Filesize
447KB

MD5
3f461ca3e3d9da036cf1a4a06ddf4fb4

SHA1
15395e4b656cee3a708bc50c1094e3fa0c46802e

SHA256
cd8e84c1f8d1ee3a7014343e3fb236329d2b67c1ec233ea4b208d99e3f95105b

SHA512
d0cb3f56db648c9ee151990260a864cdcd0d508a1dafcd741d8b2ccd8f73ba29607f384a4e2752502419cfd4a41d2288d7c3ffec93925be85fc39dad9c01e7f5

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads