22e8b0e5b9cd739f2467297fa036898d334428f6570d64710769f3ca3a69fb34

Analysis

max time kernel
147s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
29-05-2024 08:53

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General

Target

2024-05-29_c5e332f3b80f7b3f549403b56f9c7750_bkransomware.exe
Size

518KB
MD5

c5e332f3b80f7b3f549403b56f9c7750
SHA1

21ded9005a0c327d7cc2f8a6541cda2e76c44806
SHA256

22e8b0e5b9cd739f2467297fa036898d334428f6570d64710769f3ca3a69fb34
SHA512

fcc3ca9a9720a690106a9b23efaa5efc8b8986d96c9ed84b533944fbc80582bb38b9d07c20927067d5e56c0c0db4fbbe954200a744f7284ba29c0bc714d60354
SSDEEP

12288:xC0s2H1l9Tj4t0D8E9gpX0sVc/DfQuOt5vUkfj2GDq:DsUl9T0t0D8E9+b6/rQJtakfiGDq

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
4280	7pfhUtNX9jwn8p9.exe
1388	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"	2024-05-29_c5e332f3b80f7b3f549403b56f9c7750_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	2024-05-29_c5e332f3b80f7b3f549403b56f9c7750_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1852	2024-05-29_c5e332f3b80f7b3f549403b56f9c7750_bkransomware.exe
Token: SeDebugPrivilege	1388	CTS.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1852 wrote to memory of 4280	1852	2024-05-29_c5e332f3b80f7b3f549403b56f9c7750_bkransomware.exe	84
PID 1852 wrote to memory of 4280	1852	2024-05-29_c5e332f3b80f7b3f549403b56f9c7750_bkransomware.exe	84
PID 1852 wrote to memory of 4280	1852	2024-05-29_c5e332f3b80f7b3f549403b56f9c7750_bkransomware.exe	84
PID 1852 wrote to memory of 1388	1852	2024-05-29_c5e332f3b80f7b3f549403b56f9c7750_bkransomware.exe	85
PID 1852 wrote to memory of 1388	1852	2024-05-29_c5e332f3b80f7b3f549403b56f9c7750_bkransomware.exe	85
PID 1852 wrote to memory of 1388	1852	2024-05-29_c5e332f3b80f7b3f549403b56f9c7750_bkransomware.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-05-29_c5e332f3b80f7b3f549403b56f9c7750_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-29_c5e332f3b80f7b3f549403b56f9c7750_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1852
- C:\Users\Admin\AppData\Local\Temp\7pfhUtNX9jwn8p9.exe
  C:\Users\Admin\AppData\Local\Temp\7pfhUtNX9jwn8p9.exe
  2⤵
  - Executes dropped EXE
  PID:4280
- C:\Windows\CTS.exe
  "C:\Windows\CTS.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops file in Windows directory
  - Suspicious use of AdjustPrivilegeToken
  PID:1388

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

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
395KB

MD5
73dfba0b853d65791ff30ee438cc7ba8

SHA1
a4e573971ba13a9d55e828a9b5fc31f60ac6a836

SHA256
cf9c0d880eaa51067006cb3a993259f7b313f72eb626cf5098cdc33d81425fc6

SHA512
0013cf61f4b117de6a88b6be3788025c6fb964fc1676989d2217b2685e26fcf96bbc72abdb1c6c0571ef643038148c0474b55d552e4efd2edad5006af2ecfa3b

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C:\Users\Admin\AppData\Local\Temp\7pfhUtNX9jwn8p9.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