e31243c409e238bba2bb3b62befdad997af811891a9c170645ba8634bc19a162

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
28-04-2024 06:33

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General

Target

2024-04-28_e5adabe3c7b724f108ac1e8ba0514bb4_bkransomware.exe
Size

71KB
MD5

e5adabe3c7b724f108ac1e8ba0514bb4
SHA1

05cea268fc062efc1411d546f25a30de4f42081f
SHA256

e31243c409e238bba2bb3b62befdad997af811891a9c170645ba8634bc19a162
SHA512

769a0cb100d78ee5c7422ddfd91420946b92eb9a3b44dae0b594d4f33cb713cc48114ddfbc2c84bcd5d28db43d198310790a03459d464c6cfa115c0a1b6fb09e
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazT3:ZhpAyazIlyazT3

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

2276 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
2276	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_e5adabe3c7b724f108ac1e8ba0514bb4_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_e5adabe3c7b724f108ac1e8ba0514bb4_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_e5adabe3c7b724f108ac1e8ba0514bb4_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_e5adabe3c7b724f108ac1e8ba0514bb4_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_e5adabe3c7b724f108ac1e8ba0514bb4_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 3212 2024-04-28_e5adabe3c7b724f108ac1e8ba0514bb4_bkransomware.exe
Token: SeDebugPrivilege 2276 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_e5adabe3c7b724f108ac1e8ba0514bb4_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	3212	2024-04-28_e5adabe3c7b724f108ac1e8ba0514bb4_bkransomware.exe
Token: SeDebugPrivilege	2276	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-28_e5adabe3c7b724f108ac1e8ba0514bb4_bkransomware.exe

description	pid	process	target process
PID 3212 wrote to memory of 2276	3212	2024-04-28_e5adabe3c7b724f108ac1e8ba0514bb4_bkransomware.exe	CTS.exe
PID 3212 wrote to memory of 2276	3212	2024-04-28_e5adabe3c7b724f108ac1e8ba0514bb4_bkransomware.exe	CTS.exe
PID 3212 wrote to memory of 2276	3212	2024-04-28_e5adabe3c7b724f108ac1e8ba0514bb4_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_e5adabe3c7b724f108ac1e8ba0514bb4_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_e5adabe3c7b724f108ac1e8ba0514bb4_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3212

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:2276

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Filesize
392KB

MD5
a19b641d0ed478e6d5de8a58058ae2da

SHA1
d82ee12874127df1f3bd97f6eb930381ecee0b88

SHA256
770c0a4797c146a884599dfbe632461e6dc33d6395fd7cba83fa31de85dbacc8

SHA512
2cd3e9f7f4e9f960272261864e6ffd3592cd6948344eb3d0a7dc54266c1a78f2a7a7a6098c89342a180bbf22f970a187c6b4b009518b62225459f4969d9a46e8

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C:\Users\Admin\AppData\Local\Temp\3dy3wixEaD4PzcS.exe
Filesize
71KB

MD5
8969dae16c2d3b6b1b00d52e76e04aeb

SHA1
c7103a6375557be722cc906dce3ff41fcffcb80d

SHA256
9b585a3a43ec53666eefb3a551aab2b32c272ebf17d60c77cb2fa573103dc71b

SHA512
735bb964c32e8023bcc7db0cc4262384bfc10eac28f6e6dfb381d32cbc4d953b24d600e5fe9d9f84d2fa5410eb3fd66995e1f894645e4b9222a34742dd04b015

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C:\Windows\CTS.exe
Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

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