b1f39c1ddbab24c60d07d6f37dad7b24428a1d1123a2c76a8bb31729b443d33f

Analysis

max time kernel
93s
max time network
94s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
29-06-2024 04:48

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General

Target

2024-06-29_811c9fcad6c4a0a19f75afacf35c1e2b_bkransomware.exe
Size

214KB
MD5

811c9fcad6c4a0a19f75afacf35c1e2b
SHA1

3cbfcddac2381b213400c78cd7a39b1bc6f5439d
SHA256

b1f39c1ddbab24c60d07d6f37dad7b24428a1d1123a2c76a8bb31729b443d33f
SHA512

0b9e9c790f6b866566b632ae3b719b491976dbba3f703a32dfb453413a4e281a1f5d229126056f3158867591f7a95bb2fa27854dac21268baf9d2cdb3c1297ac
SSDEEP

6144:hZMazqLtHtg7nitqAjpfwYNQQdkUd8hwQt:hS0qL7gedbGM8

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
3908	oxOaChOnL1zBG4N.exe
6116	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"	2024-06-29_811c9fcad6c4a0a19f75afacf35c1e2b_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	2024-06-29_811c9fcad6c4a0a19f75afacf35c1e2b_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1348	2024-06-29_811c9fcad6c4a0a19f75afacf35c1e2b_bkransomware.exe
Token: SeDebugPrivilege	6116	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1348 wrote to memory of 3908	1348	2024-06-29_811c9fcad6c4a0a19f75afacf35c1e2b_bkransomware.exe	81
PID 1348 wrote to memory of 3908	1348	2024-06-29_811c9fcad6c4a0a19f75afacf35c1e2b_bkransomware.exe	81
PID 1348 wrote to memory of 6116	1348	2024-06-29_811c9fcad6c4a0a19f75afacf35c1e2b_bkransomware.exe	83
PID 1348 wrote to memory of 6116	1348	2024-06-29_811c9fcad6c4a0a19f75afacf35c1e2b_bkransomware.exe	83
PID 1348 wrote to memory of 6116	1348	2024-06-29_811c9fcad6c4a0a19f75afacf35c1e2b_bkransomware.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-06-29_811c9fcad6c4a0a19f75afacf35c1e2b_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-29_811c9fcad6c4a0a19f75afacf35c1e2b_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1348
- C:\Users\Admin\AppData\Local\Temp\oxOaChOnL1zBG4N.exe
  C:\Users\Admin\AppData\Local\Temp\oxOaChOnL1zBG4N.exe
  2⤵
  - Executes dropped EXE
  PID:3908
- 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:6116

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
394KB

MD5
5d1b440ab6ee2fdd40acc9c419a25d8c

SHA1
ece81c661d40310efaf0deba6814d16d32a93504

SHA256
d64f56d4693cd648b82d719793b3ad968bf6a6ef708d591e1de7fb7c0033906b

SHA512
b241dcb8278eb316c691043e5712a6581345ffeb3d33bc23f0db55dc38a0332ebe10eead43d7dc6ca936b10d46751c8c2f200c655fe8ce0f6cdf3b640146e21a

Download Submit
C:\Users\Admin\AppData\Local\Temp\oxOaChOnL1zBG4N.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/3908-14-0x0000000000750000-0x0000000000778000-memory.dmp

Filesize
160KB

Download
memory/3908-12-0x00007FFA03793000-0x00007FFA03795000-memory.dmp

Filesize
8KB

Download
memory/3908-23-0x00007FFA03790000-0x00007FFA04251000-memory.dmp

Filesize
10.8MB

Download
memory/3908-33-0x00007FFA03790000-0x00007FFA04251000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads