ea18ad74d460aec70d1f49401a5d56b23ba90c392f1172a924f6272430bef78e

Analysis

max time kernel
66s
max time network
51s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
28-04-2024 06:36

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General

Target

2024-04-28_f4bab9d986f97cf0676e07f2f6da69ed_bkransomware.exe
Size

96KB
MD5

f4bab9d986f97cf0676e07f2f6da69ed
SHA1

4d7baa80e71cc5f31033193c8db2e5bf7842c723
SHA256

ea18ad74d460aec70d1f49401a5d56b23ba90c392f1172a924f6272430bef78e
SHA512

f28b89d0654c7a965b56eb00ac8091227b18fab035dca56efd6fe06fff03df0e106653a64a4982728f96e22a1e84ee66191ea37ab999ac188c4107e08be2be00
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTZdIQOHg26:ZhpAyazIlyazTZehA3

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

bpYcURPlLOWQHXq.exeCTS.exe

pid process

1228 bpYcURPlLOWQHXq.exe
3976 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

pid	process
1228	bpYcURPlLOWQHXq.exe
3976	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-04-28_f4bab9d986f97cf0676e07f2f6da69ed_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-04-28_f4bab9d986f97cf0676e07f2f6da69ed_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

Processes:

2024-04-28_f4bab9d986f97cf0676e07f2f6da69ed_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_f4bab9d986f97cf0676e07f2f6da69ed_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_f4bab9d986f97cf0676e07f2f6da69ed_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 4988 2024-04-28_f4bab9d986f97cf0676e07f2f6da69ed_bkransomware.exe
Token: SeDebugPrivilege 3976 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_f4bab9d986f97cf0676e07f2f6da69ed_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	4988	2024-04-28_f4bab9d986f97cf0676e07f2f6da69ed_bkransomware.exe
Token: SeDebugPrivilege	3976	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

2024-04-28_f4bab9d986f97cf0676e07f2f6da69ed_bkransomware.exe

description	pid	process	target process
PID 4988 wrote to memory of 1228	4988	2024-04-28_f4bab9d986f97cf0676e07f2f6da69ed_bkransomware.exe	bpYcURPlLOWQHXq.exe
PID 4988 wrote to memory of 1228	4988	2024-04-28_f4bab9d986f97cf0676e07f2f6da69ed_bkransomware.exe	bpYcURPlLOWQHXq.exe
PID 4988 wrote to memory of 3976	4988	2024-04-28_f4bab9d986f97cf0676e07f2f6da69ed_bkransomware.exe	CTS.exe
PID 4988 wrote to memory of 3976	4988	2024-04-28_f4bab9d986f97cf0676e07f2f6da69ed_bkransomware.exe	CTS.exe
PID 4988 wrote to memory of 3976	4988	2024-04-28_f4bab9d986f97cf0676e07f2f6da69ed_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_f4bab9d986f97cf0676e07f2f6da69ed_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_f4bab9d986f97cf0676e07f2f6da69ed_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4988
- C:\Users\Admin\AppData\Local\Temp\bpYcURPlLOWQHXq.exe
  C:\Users\Admin\AppData\Local\Temp\bpYcURPlLOWQHXq.exe
  2⤵
  - Executes dropped EXE
  PID:1228
- 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:3976

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml

Filesize
394KB

MD5
3547efbdb0fb03d0d8d6c6d9c1a5817e

SHA1
0ea6224881e5a4190f8ef7ec8b04ae67685ab48f

SHA256
aa7af62453aa4383e4941b25e2bd446794498ca3d5854c4e4aba606504129228

SHA512
d37709ccd67d086ae9ae6de67a40ecbf9bfb27f1df96e4416ce7cd56e93a3ab1a596e26cf854536e66f644f815ff968abc15f564f8c5d3d3b884f0ff8effb7ae

Download Submit
C:\Users\Admin\AppData\Local\Temp\bpYcURPlLOWQHXq.exe

Filesize
25KB

MD5
abbd49c180a2f8703f6306d6fa731fdc

SHA1
d63f4bfe7f74936b2fbace803e3da6103fbf6586

SHA256
5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1

SHA512
290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit
memory/1228-10-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download