8ad534cf58277e5822a0ce3cce7c984ed9b1e52e7d9f3420ea611df69d6f1eea

Analysis

max time kernel
67s
max time network
53s
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 14:39

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General

Target

2024-04-28_752392f1bef1e07da173939366af26cc_bkransomware.exe
Size

71KB
MD5

752392f1bef1e07da173939366af26cc
SHA1

615e4b5bef1540909af63f7f66b91e2870353ae5
SHA256

8ad534cf58277e5822a0ce3cce7c984ed9b1e52e7d9f3420ea611df69d6f1eea
SHA512

62148fb85ebf7a990f73871e14f85b50a0c17666956ca407fba081a60045d25cb871e181443e31fb6d0552640a82c5fafb7970b23715bc622da50eb303653b51
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazT9:ZhpAyazIlyazT9

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

764 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
764	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_752392f1bef1e07da173939366af26cc_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_752392f1bef1e07da173939366af26cc_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_752392f1bef1e07da173939366af26cc_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_752392f1bef1e07da173939366af26cc_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_752392f1bef1e07da173939366af26cc_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 3280 2024-04-28_752392f1bef1e07da173939366af26cc_bkransomware.exe
Token: SeDebugPrivilege 764 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_752392f1bef1e07da173939366af26cc_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	3280	2024-04-28_752392f1bef1e07da173939366af26cc_bkransomware.exe
Token: SeDebugPrivilege	764	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-28_752392f1bef1e07da173939366af26cc_bkransomware.exe

description	pid	process	target process
PID 3280 wrote to memory of 764	3280	2024-04-28_752392f1bef1e07da173939366af26cc_bkransomware.exe	CTS.exe
PID 3280 wrote to memory of 764	3280	2024-04-28_752392f1bef1e07da173939366af26cc_bkransomware.exe	CTS.exe
PID 3280 wrote to memory of 764	3280	2024-04-28_752392f1bef1e07da173939366af26cc_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_752392f1bef1e07da173939366af26cc_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_752392f1bef1e07da173939366af26cc_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3280

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:764

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Filesize
394KB

MD5
e7d4dba8c5b1559b00dd0a0fb561dcc2

SHA1
0649ff7631cc283b4e515938f12a2b929e6e8579

SHA256
830d6ca791f815b67d3e7ecf65ff37d14d00a4eed4beb46cd9a677d8fa3676e3

SHA512
37e8812d7750f508075225c33e653088230f286a359f6081c380c8906f7410e2a7ead2c4fb262f324da0f30f7e893ae520ec63bc4930517a474eb7d580f7909c

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C:\Users\Admin\AppData\Local\Temp\A1znnlzaCgMfGbh.exe
Filesize
71KB

MD5
e3f58586ef412a971af21261e7618fa4

SHA1
c1e072c63f190e084dd9ad3ab26a7a6544c2602d

SHA256
1ca5222d959dde5df07d171a9873c85987e0e68a94526e4ee5d501dc91a7f0e5

SHA512
1371a534b887ac5afe1364e46df48b5119cfa01ae9aa5f7b89002149fc8aae1fa8cfff2a7efa1ba8fe8c9ca8a920820853b45ee14368ab0d0f1bebf82de7cadd

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C:\Windows\CTS.exe
Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

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