a866ac6a9730ca33291d2e54a5a42ba170512e0a7d5c72db67818b5316a68c17

Analysis

max time kernel
66s
max time network
52s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
01/05/2024, 13:46

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General

Target

2024-05-01_5e5e54dd46b67c7716ca25261b03d1f9_bkransomware.exe
Size

71KB
MD5

5e5e54dd46b67c7716ca25261b03d1f9
SHA1

eeee30a15fb173a19b0df4d5b40c2bc7357b1aa0
SHA256

a866ac6a9730ca33291d2e54a5a42ba170512e0a7d5c72db67818b5316a68c17
SHA512

c07401672f21ac844a45e25bddf07cf3d65a18eca5fba6dc6b0c84b108fecff229560b403b30458e6ed8ae66cafb4f2e23ac10a672dcf8e9a2947b8f1304b0bb
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT7:ZRpAyazIliazT7

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2384	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"	2024-05-01_5e5e54dd46b67c7716ca25261b03d1f9_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	2024-05-01_5e5e54dd46b67c7716ca25261b03d1f9_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2920	2024-05-01_5e5e54dd46b67c7716ca25261b03d1f9_bkransomware.exe
Token: SeDebugPrivilege	2384	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2920 wrote to memory of 2384	2920	2024-05-01_5e5e54dd46b67c7716ca25261b03d1f9_bkransomware.exe	84
PID 2920 wrote to memory of 2384	2920	2024-05-01_5e5e54dd46b67c7716ca25261b03d1f9_bkransomware.exe	84
PID 2920 wrote to memory of 2384	2920	2024-05-01_5e5e54dd46b67c7716ca25261b03d1f9_bkransomware.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-05-01_5e5e54dd46b67c7716ca25261b03d1f9_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-01_5e5e54dd46b67c7716ca25261b03d1f9_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2920
- 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:2384

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
392KB

MD5
2d23f9bb96272e78f632e8d94fdb26b2

SHA1
f051e80cbd13210520adc2d46eedfe6dd2f7f56f

SHA256
1ba1aa342bb6634eed2783680ea560a0e8984661bef39b8226719b08d90b708e

SHA512
d1e4fc83427d7f025a0f720ba9a51d93a62ef0d0fd3a5a718f159694e047c0687b218a273bf82f7e38d57d0aca54c8e346c8d0eba176c21c821e618ac1f47700

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C:\Users\Admin\AppData\Local\Temp\lmxzUTH00VN5FfM.exe

Filesize
71KB

MD5
c7af2dfc4e27c8d8b42f5227d9b5aba7

SHA1
e9a8fa91c59f1707a75076bb1946eb1338209a8a

SHA256
eede0125bee8025061e9dde599df38f235995ced51de0d8de235b688ecf775c9

SHA512
e2d402aadcbe19fd452281c3bf2160c594ee0908a933e0e7da71e6121e657d9b2f78e5272cb7c3fa7267a9fcd30bc982548d72c5239c26e64bf8869aeed49500

Download Submit
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

Replay Monitor

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Downloads