1303d127e84d7a733997ec2ae6b9ef0d684fba84fd0e61cb56ddfad967cb9acb

Analysis

max time kernel
122s
max time network
123s
platform
windows7_x64
resource
win7-20240419-en
resource tags

arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
submitted
29-04-2024 12:51

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General

Target

2024-04-29_efe7969d21c8557c72e22560e43d1e80_bkransomware.exe
Size

172KB
MD5

efe7969d21c8557c72e22560e43d1e80
SHA1

800fefea2b0b086b84cd735d7ea95a1209033f8d
SHA256

1303d127e84d7a733997ec2ae6b9ef0d684fba84fd0e61cb56ddfad967cb9acb
SHA512

faf51d5fa70f0edf47856ad29f20825c0737f1ab179270a4986efb39ac61a0593eba7236b855f6e6fb6d25fa692c77fcb713f78b7364abbab5fe03b3b8c87f11
SSDEEP

3072:ZhpAyazIlyazTqZwSzqxLGD7iqD3QD5HZVkqi1i5CpUIkVj:hZMazuu9yD2qD3QD5rLbQsB

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 3 IoCs

pid	Process
2264	56xaz3OL8zinbA2.exe
3064	CTS.exe
1208	Process not Found

Loads dropped DLL 2 IoCs

pid	Process
2288	2024-04-29_efe7969d21c8557c72e22560e43d1e80_bkransomware.exe
2220	Process not Found

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"	2024-04-29_efe7969d21c8557c72e22560e43d1e80_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	CTS.exe
File created	C:\Windows\CTS.exe	2024-04-29_efe7969d21c8557c72e22560e43d1e80_bkransomware.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2288	2024-04-29_efe7969d21c8557c72e22560e43d1e80_bkransomware.exe
Token: SeDebugPrivilege	3064	CTS.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2288 wrote to memory of 2264	2288	2024-04-29_efe7969d21c8557c72e22560e43d1e80_bkransomware.exe	28
PID 2288 wrote to memory of 2264	2288	2024-04-29_efe7969d21c8557c72e22560e43d1e80_bkransomware.exe	28
PID 2288 wrote to memory of 2264	2288	2024-04-29_efe7969d21c8557c72e22560e43d1e80_bkransomware.exe	28
PID 2288 wrote to memory of 2264	2288	2024-04-29_efe7969d21c8557c72e22560e43d1e80_bkransomware.exe	28
PID 2288 wrote to memory of 3064	2288	2024-04-29_efe7969d21c8557c72e22560e43d1e80_bkransomware.exe	30
PID 2288 wrote to memory of 3064	2288	2024-04-29_efe7969d21c8557c72e22560e43d1e80_bkransomware.exe	30
PID 2288 wrote to memory of 3064	2288	2024-04-29_efe7969d21c8557c72e22560e43d1e80_bkransomware.exe	30
PID 2288 wrote to memory of 3064	2288	2024-04-29_efe7969d21c8557c72e22560e43d1e80_bkransomware.exe	30

C:\Users\Admin\AppData\Local\Temp\2024-04-29_efe7969d21c8557c72e22560e43d1e80_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-29_efe7969d21c8557c72e22560e43d1e80_bkransomware.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2288
- C:\Users\Admin\AppData\Local\Temp\56xaz3OL8zinbA2.exe
  C:\Users\Admin\AppData\Local\Temp\56xaz3OL8zinbA2.exe
  2⤵
  - Executes dropped EXE
  PID:2264
- 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:3064

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\56xaz3OL8zinbA2.exe

Filesize
172KB

MD5
b09501d9de29a11ddfd2355454d02913

SHA1
a455a679bc8aa877794c0f9b3b0763f5c77cd27a

SHA256
825b35070e05ff519a3c54cef6c30d6fcb41dfd3706ce1c184a23ed479395443

SHA512
7d9c2c875ca21c0750b4cf4628fff386f005beb0c99ceefdb20608f51d9eaae12a38370ed65ed31897a5557362c485410643591f169fcb269eeff78182851d1c

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit
\Users\Admin\AppData\Local\Temp\56xaz3OL8zinbA2.exe

Filesize
100KB

MD5
db697c943fcb215f757f9c22c907c568

SHA1
c57d891472f5ede8b1ee5d9bd6f5ad8fc8e9e5d7

SHA256
07c96337729e3c4c986e8f5660a97cb475c4c04842606be2654b37892af57de9

SHA512
bfa5c34d8c78015ccf96a2ef1c6d8f82157eb88680139bdbb51c55e3cd2a7c41bf364a364fd62b180b202cdf4f3d7d31c3710b8709c1d25a639bb00dfc97b646

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads