8933eb2aab8d057fa993da65859773005cc8029e4c69f3b4f74a8ad220a594d5

Analysis

max time kernel
118s
max time network
119s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
24/05/2024, 12:17

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General

Target

2024-05-24_f71578f3426a714a74f209e74ab4cf1d_bkransomware.exe
Size

71KB
MD5

f71578f3426a714a74f209e74ab4cf1d
SHA1

7e141a24280416a71e1975f8095c13ff904ea1d0
SHA256

8933eb2aab8d057fa993da65859773005cc8029e4c69f3b4f74a8ad220a594d5
SHA512

ddfaaf59da930963be4aaf68b20420449c088db34ffa4f27e427af19547a391e9cc6f078f006ea7ef4686630ea3b2b9ce8f404c0b4215c99aacc265d148b5b87
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTd:ZhpAyazIlyazTd

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2236	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"	2024-05-24_f71578f3426a714a74f209e74ab4cf1d_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	2024-05-24_f71578f3426a714a74f209e74ab4cf1d_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1992	2024-05-24_f71578f3426a714a74f209e74ab4cf1d_bkransomware.exe
Token: SeDebugPrivilege	2236	CTS.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1992 wrote to memory of 2236	1992	2024-05-24_f71578f3426a714a74f209e74ab4cf1d_bkransomware.exe	28
PID 1992 wrote to memory of 2236	1992	2024-05-24_f71578f3426a714a74f209e74ab4cf1d_bkransomware.exe	28
PID 1992 wrote to memory of 2236	1992	2024-05-24_f71578f3426a714a74f209e74ab4cf1d_bkransomware.exe	28
PID 1992 wrote to memory of 2236	1992	2024-05-24_f71578f3426a714a74f209e74ab4cf1d_bkransomware.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-24_f71578f3426a714a74f209e74ab4cf1d_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-24_f71578f3426a714a74f209e74ab4cf1d_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1992
- 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:2236

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\Temp\LfEMY0jF6pvu0Bz.exe

Filesize
71KB

MD5
c429e4d1b86fab57b7891e16ea04f325

SHA1
db36835e228b6e0374d509403af5f590baddb306

SHA256
936ff554913cd4eb554fcdfff4a4ca5ab967f646ec00151e08630aa1c1d58a18

SHA512
50648bec10e36d94f4af5992f1965f976646bedda7c877f9aa3edb4be13b47492e258f766d8883e961e7715dffe86cec184c25ed939d23919e8a4d8a9af23322

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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