cfc2df936823bb9fa8fd06c4bb02a00b23bfcb91ffa37193420f0025cefa4ae4

General

Target

2024-10-12_821faf420d3771fa5fb903b5b031c555_bkransomware.exe
Size

595KB
MD5

821faf420d3771fa5fb903b5b031c555
SHA1

dcd2ecf229422b35e11abecc0e018b8d829babb8
SHA256

cfc2df936823bb9fa8fd06c4bb02a00b23bfcb91ffa37193420f0025cefa4ae4
SHA512

f1853602df5eb5b21f6af200ef3e4b0c650c270eed708c710b30f24fe73fc34b74950b181cf741c3c666a6410b08e6801995ed2d044c9a5e1e5c77056f1a5828
SSDEEP

12288:hS0OWhYsioAunt7539x8edAi69+fTIQfhMgoR3Ptf1NlDT4HmPathKWUr7rwf:DOOYPop753r8edt69+f5gf1Nx4GiWWUE

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
3968	vXtydhYoJ4cBldT.exe
4748	CTS.exe

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

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"	2024-10-12_821faf420d3771fa5fb903b5b031c555_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	2024-10-12_821faf420d3771fa5fb903b5b031c555_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

System Location Discovery: System Language Discovery 1 TTPs 2 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	CTS.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2024-10-12_821faf420d3771fa5fb903b5b031c555_bkransomware.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1984	2024-10-12_821faf420d3771fa5fb903b5b031c555_bkransomware.exe
Token: SeDebugPrivilege	4748	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1984 wrote to memory of 3968	1984	2024-10-12_821faf420d3771fa5fb903b5b031c555_bkransomware.exe	85
PID 1984 wrote to memory of 3968	1984	2024-10-12_821faf420d3771fa5fb903b5b031c555_bkransomware.exe	85
PID 1984 wrote to memory of 4748	1984	2024-10-12_821faf420d3771fa5fb903b5b031c555_bkransomware.exe	87
PID 1984 wrote to memory of 4748	1984	2024-10-12_821faf420d3771fa5fb903b5b031c555_bkransomware.exe	87
PID 1984 wrote to memory of 4748	1984	2024-10-12_821faf420d3771fa5fb903b5b031c555_bkransomware.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-10-12_821faf420d3771fa5fb903b5b031c555_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-10-12_821faf420d3771fa5fb903b5b031c555_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:1984
- C:\Users\Admin\AppData\Local\Temp\vXtydhYoJ4cBldT.exe
  C:\Users\Admin\AppData\Local\Temp\vXtydhYoJ4cBldT.exe
  2⤵
  - Executes dropped EXE
  PID:3968
- 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:4748

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

1

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
391KB

MD5
be719a3a034f5e7624ae74505e0e961a

SHA1
524960cb36e1c60d8d02907982644eb4f8238ae3

SHA256
fa7f1c8545038fa933443878a233f1329c552980e9d775ce4a724a153e622ed8

SHA512
5c1de748aa4ca25161fa4ec54558b3def9874d8a5dbd9520ae0f826a1d9dacd121e0fec434f5affb0199c91410fba3ab75cc1d7eb42b15d35d3b360ffdb60ca0

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C:\Users\Admin\AppData\Local\Temp\vXtydhYoJ4cBldT.exe

Filesize
524KB

MD5
645d5875c0ce2052d93943c62238a06e

SHA1
38c00dfaa6e0192e1157212d5baf42a8db869776

SHA256
66ef54018ef1207394bef76bcb0411f2fbbedd6230a812026bf8f1710218dbf9

SHA512
eb9654b527ddc15fae042ef6fa6b8a25f76c2fc21314abd1d629bac5066cfa11d9f3c1191150dc7784b20e5e47c4855ab97d34fadf904989a7a43ccd626949fe

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C:\Users\Admin\AppData\Local\Temp\vXtydhYoJ4cBldT.exe

Filesize
595KB

MD5
77291597c8deec3f1991bf5e3da05eae

SHA1
b8233f52b17d7064985b167ebb4e91ac0ecaf0b4

SHA256
c6cf47575128b5077525f68df374897f2b8e7c60a6c25b6e8bc74ae950591c7f

SHA512
38700913f77a5d08248940a81926b53ecbe2bc363b93b13a0902f34574520d93494f21cf72c210059193f70a18c4e3f5181cfc5f7eb43440bf2595c5e963442d

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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