0e081fbcfcd3492c465941b61b3f2480d4a0a22365402c688adfd8839917009f

Analysis

max time kernel
133s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
05/05/2024, 07:50

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General

Target

2024-05-05_a56d298dffcecc1bfa382ae03c276f20_bkransomware.exe
Size

214KB
MD5

a56d298dffcecc1bfa382ae03c276f20
SHA1

2b4c419ac497ad6f14e078693c050bbd07f14fe7
SHA256

0e081fbcfcd3492c465941b61b3f2480d4a0a22365402c688adfd8839917009f
SHA512

4cd1de16fba4bf028e107c973754e7be6585a067dda376f4a05e586aa74c068a13faf450c644dd25c613fce012227f2cabd742e433140041bca2f4a27b49f0c5
SSDEEP

3072:ZhpAyazIlyazTh6sRQ4LsIDIs+3xq6GCTac6xPZwOQHMe8JGplPWYs:hZMazsR4XIs+3xqMQhw78JGpli

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
5100	fn13LFZortcub02.exe
868	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"	2024-05-05_a56d298dffcecc1bfa382ae03c276f20_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	2024-05-05_a56d298dffcecc1bfa382ae03c276f20_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2976	2024-05-05_a56d298dffcecc1bfa382ae03c276f20_bkransomware.exe
Token: SeDebugPrivilege	868	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2976 wrote to memory of 5100	2976	2024-05-05_a56d298dffcecc1bfa382ae03c276f20_bkransomware.exe	84
PID 2976 wrote to memory of 5100	2976	2024-05-05_a56d298dffcecc1bfa382ae03c276f20_bkransomware.exe	84
PID 2976 wrote to memory of 868	2976	2024-05-05_a56d298dffcecc1bfa382ae03c276f20_bkransomware.exe	86
PID 2976 wrote to memory of 868	2976	2024-05-05_a56d298dffcecc1bfa382ae03c276f20_bkransomware.exe	86
PID 2976 wrote to memory of 868	2976	2024-05-05_a56d298dffcecc1bfa382ae03c276f20_bkransomware.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-05-05_a56d298dffcecc1bfa382ae03c276f20_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-05_a56d298dffcecc1bfa382ae03c276f20_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2976
- C:\Users\Admin\AppData\Local\Temp\fn13LFZortcub02.exe
  C:\Users\Admin\AppData\Local\Temp\fn13LFZortcub02.exe
  2⤵
  - Executes dropped EXE
  PID:5100
- 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:868

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
276f33894b60c1851d633615361ef4fe

SHA1
57d347ea08fbbdb0b004ca24721a13f871ec1d3a

SHA256
caa5d7290512aea8cd26b8ab0558b4946675c4e74eff049d2f8f31e473e9bd83

SHA512
1e99e9689d751291b94fb8a64380f090ccf30743a94ee449dc7a2e130bb79d4c07bbfad9851fe839d95401c07f5828ead14679f41fd3d5ce89d8612623ef065c

Download Submit
C:\Users\Admin\AppData\Local\Temp\fn13LFZortcub02.exe

Filesize
143KB

MD5
c583d768336377e263ed3de978da7c6e

SHA1
2c48977d57dfe983781ae622056588233d7d67ee

SHA256
54836a96884e0e9b30b1ff5b3ece61ce17dd472a4b09137296cd7915ec4a0fac

SHA512
284adabd0b025057d4f43e860b9cb64fd9505439c658cf011b87fcce5b15c6d6ebeae1134373c48401b559bdb465e882798127edb7c0fbbba59f225f85150b93

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit
memory/5100-11-0x00007FFF27C83000-0x00007FFF27C85000-memory.dmp

Filesize
8KB

Download
memory/5100-10-0x00000000006E0000-0x0000000000708000-memory.dmp

Filesize
160KB

Download
memory/5100-19-0x00007FFF27C80000-0x00007FFF28741000-memory.dmp

Filesize
10.8MB

Download
memory/5100-33-0x00007FFF27C80000-0x00007FFF28741000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads