580fa847651c4525229135c7d8bd0d180b68ac839e265f2be02741f748ac59f9

Analysis

max time kernel
143s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
27-07-2024 04:02

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General

Target

2024-07-27_b2dbc7ac76c1cf283e3c5cfed0d972cd_bkransomware.exe
Size

518KB
MD5

b2dbc7ac76c1cf283e3c5cfed0d972cd
SHA1

152fc2f108e9d83340aabf60842cb7cc84f03a99
SHA256

580fa847651c4525229135c7d8bd0d180b68ac839e265f2be02741f748ac59f9
SHA512

1e416369df4e43bfd826a416fa0ff1083ae720000d3e9dc1162341509a053a670a457fdad4cdb4941d71d1df374e145b535182ee8dc752ba978f295b1e7f9b79
SSDEEP

12288:xC0rk/VBTR8VwrHo0s8VarzDLlq+TKnv+VWuvs:DyPR8VwtsQyznMmKW/k

Score

7^/10

discovery persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
3244	2sSuG0BC9fvSJUM.exe
2392	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"	2024-07-27_b2dbc7ac76c1cf283e3c5cfed0d972cd_bkransomware.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	CTS.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\CTS.exe	2024-07-27_b2dbc7ac76c1cf283e3c5cfed0d972cd_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	2024-07-27_b2dbc7ac76c1cf283e3c5cfed0d972cd_bkransomware.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2sSuG0BC9fvSJUM.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2688	2024-07-27_b2dbc7ac76c1cf283e3c5cfed0d972cd_bkransomware.exe
Token: SeDebugPrivilege	2392	CTS.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2688 wrote to memory of 3244	2688	2024-07-27_b2dbc7ac76c1cf283e3c5cfed0d972cd_bkransomware.exe	84
PID 2688 wrote to memory of 3244	2688	2024-07-27_b2dbc7ac76c1cf283e3c5cfed0d972cd_bkransomware.exe	84
PID 2688 wrote to memory of 3244	2688	2024-07-27_b2dbc7ac76c1cf283e3c5cfed0d972cd_bkransomware.exe	84
PID 2688 wrote to memory of 2392	2688	2024-07-27_b2dbc7ac76c1cf283e3c5cfed0d972cd_bkransomware.exe	85
PID 2688 wrote to memory of 2392	2688	2024-07-27_b2dbc7ac76c1cf283e3c5cfed0d972cd_bkransomware.exe	85
PID 2688 wrote to memory of 2392	2688	2024-07-27_b2dbc7ac76c1cf283e3c5cfed0d972cd_bkransomware.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-07-27_b2dbc7ac76c1cf283e3c5cfed0d972cd_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-07-27_b2dbc7ac76c1cf283e3c5cfed0d972cd_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:2688
- C:\Users\Admin\AppData\Local\Temp\2sSuG0BC9fvSJUM.exe
  C:\Users\Admin\AppData\Local\Temp\2sSuG0BC9fvSJUM.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:3244
- 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:2392

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
2714c34b084a43e463ad85f514d63a6d

SHA1
d8bd0e1d9103f43b60832bf6fcbce00c87a45285

SHA256
c73465cdc7c8a623a999723b222a9dfe24f13591b191778fad6470467f534dde

SHA512
2261b9710a8fb1c9172ee6860529bb947cae7ce94798e4ffd07bc6f34b3c473751c57e0c81be562ec15a82b6dc48437b165c98877eec4808b429125e46db2bf9

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C:\Users\Admin\AppData\Local\Temp\2sSuG0BC9fvSJUM.exe

Filesize
447KB

MD5
3f461ca3e3d9da036cf1a4a06ddf4fb4

SHA1
15395e4b656cee3a708bc50c1094e3fa0c46802e

SHA256
cd8e84c1f8d1ee3a7014343e3fb236329d2b67c1ec233ea4b208d99e3f95105b

SHA512
d0cb3f56db648c9ee151990260a864cdcd0d508a1dafcd741d8b2ccd8f73ba29607f384a4e2752502419cfd4a41d2288d7c3ffec93925be85fc39dad9c01e7f5

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C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads