a1faef54471bc8daad50766cfd7664bebb6e13ab8ef9a12cbb2453ac2eb723ed

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
06/07/2024, 12:52

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General

Target

2024-07-06_c8c66d5499ff03d8ef49547e6f34c102_bkransomware.exe
Size

96KB
MD5

c8c66d5499ff03d8ef49547e6f34c102
SHA1

2751ab5a3f653105da8b2297c55ca948950c25f0
SHA256

a1faef54471bc8daad50766cfd7664bebb6e13ab8ef9a12cbb2453ac2eb723ed
SHA512

2f28b8ade81809c635ee28a6d2cdc1314827cdeab596bb5acef32b019dcf6c4da97a71dab36958654ace84e1790ea68410a66c14b26d0b6a5391c7703a88722d
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTPKVfSle8iuL9MnSGaPc:ZRpAyazIliazTSkleDuxELqc

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
1688	CTS.exe
1888	7NlXarVdKoRJMUa.exe

Loads dropped DLL 3 IoCs

pid	Process
2192	2024-07-06_c8c66d5499ff03d8ef49547e6f34c102_bkransomware.exe
2192	2024-07-06_c8c66d5499ff03d8ef49547e6f34c102_bkransomware.exe
2660	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"	2024-07-06_c8c66d5499ff03d8ef49547e6f34c102_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	2024-07-06_c8c66d5499ff03d8ef49547e6f34c102_bkransomware.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2192	2024-07-06_c8c66d5499ff03d8ef49547e6f34c102_bkransomware.exe
Token: SeDebugPrivilege	1688	CTS.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2192 wrote to memory of 1888	2192	2024-07-06_c8c66d5499ff03d8ef49547e6f34c102_bkransomware.exe	28
PID 2192 wrote to memory of 1888	2192	2024-07-06_c8c66d5499ff03d8ef49547e6f34c102_bkransomware.exe	28
PID 2192 wrote to memory of 1888	2192	2024-07-06_c8c66d5499ff03d8ef49547e6f34c102_bkransomware.exe	28
PID 2192 wrote to memory of 1888	2192	2024-07-06_c8c66d5499ff03d8ef49547e6f34c102_bkransomware.exe	28
PID 2192 wrote to memory of 1688	2192	2024-07-06_c8c66d5499ff03d8ef49547e6f34c102_bkransomware.exe	29
PID 2192 wrote to memory of 1688	2192	2024-07-06_c8c66d5499ff03d8ef49547e6f34c102_bkransomware.exe	29
PID 2192 wrote to memory of 1688	2192	2024-07-06_c8c66d5499ff03d8ef49547e6f34c102_bkransomware.exe	29
PID 2192 wrote to memory of 1688	2192	2024-07-06_c8c66d5499ff03d8ef49547e6f34c102_bkransomware.exe	29

C:\Users\Admin\AppData\Local\Temp\2024-07-06_c8c66d5499ff03d8ef49547e6f34c102_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-07-06_c8c66d5499ff03d8ef49547e6f34c102_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:2192
- C:\Users\Admin\AppData\Local\Temp\7NlXarVdKoRJMUa.exe
  C:\Users\Admin\AppData\Local\Temp\7NlXarVdKoRJMUa.exe
  2⤵
  - Executes dropped EXE
  PID:1888
- 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:1688

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:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit
\Users\Admin\AppData\Local\Temp\7NlXarVdKoRJMUa.exe

Filesize
25KB

MD5
abbd49c180a2f8703f6306d6fa731fdc

SHA1
d63f4bfe7f74936b2fbace803e3da6103fbf6586

SHA256
5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1

SHA512
290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9

Download Submit
memory/1888-15-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads