6610041047c477586cb56121a149f7e68a9173b488b6025dec4962612b1006c0

Analysis

max time kernel
66s
max time network
54s
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 03:47

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General

Target

2024-04-28_a330e42f43eefe1d03492389b47289dc_bkransomware.exe
Size

71KB
MD5

a330e42f43eefe1d03492389b47289dc
SHA1

799cd9ecee56a15b763fd4ad4f27950d3615d3e9
SHA256

6610041047c477586cb56121a149f7e68a9173b488b6025dec4962612b1006c0
SHA512

8b9bd4caa4170036f4bac5e96e023d9b8dadf3f2f9523f439ded156f9c8e19c39da5196911c9f69fe1acbe8222d5a8bdc8afb52d6dec5d169cf583c63eaa5116
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTo:ZhpAyazIlyazTo

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

3276 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
3276	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_a330e42f43eefe1d03492389b47289dc_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_a330e42f43eefe1d03492389b47289dc_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_a330e42f43eefe1d03492389b47289dc_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_a330e42f43eefe1d03492389b47289dc_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_a330e42f43eefe1d03492389b47289dc_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 1248 2024-04-28_a330e42f43eefe1d03492389b47289dc_bkransomware.exe
Token: SeDebugPrivilege 3276 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_a330e42f43eefe1d03492389b47289dc_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	1248	2024-04-28_a330e42f43eefe1d03492389b47289dc_bkransomware.exe
Token: SeDebugPrivilege	3276	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-28_a330e42f43eefe1d03492389b47289dc_bkransomware.exe

description	pid	process	target process
PID 1248 wrote to memory of 3276	1248	2024-04-28_a330e42f43eefe1d03492389b47289dc_bkransomware.exe	CTS.exe
PID 1248 wrote to memory of 3276	1248	2024-04-28_a330e42f43eefe1d03492389b47289dc_bkransomware.exe	CTS.exe
PID 1248 wrote to memory of 3276	1248	2024-04-28_a330e42f43eefe1d03492389b47289dc_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_a330e42f43eefe1d03492389b47289dc_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_a330e42f43eefe1d03492389b47289dc_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1248

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:3276

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
aedb58d780e3c7ab7b3a1e34311fc752

SHA1
3f3dfb63f7def4f908c44f7ba3459edfbdee60ef

SHA256
59bc4f040cc678af3a21900e851b60a029ced30778f60eff7e0ab92f723e18b1

SHA512
277a4a393d148a884a0dba2bf76f9e4564b209503f3ba73cb3bd05d0748aa0893f8904f77a1b739fc76f52e858a4dbdd1f1ce308692e4dbc87f0e4e6a55dd2b9

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C:\Users\Admin\AppData\Local\Temp\adNGyuRHP4dY8Xa.exe
Filesize
71KB

MD5
9c3d9f769117b3f6845e2a5f9ecde1d5

SHA1
051ac0c94a7cecac0e79cbd6ae24a98245db058e

SHA256
1929f3a173ffa3f4d3c2bbcb247af0773fdc2c8fc8c4dbfa7728608fbdac590f

SHA512
98bfb51401880cf4de3ddbc149bfe396e14b5a009327624f899d5fba0894058db2c4c34ffcba8887347bc38ea2da6144c2ce8e898b01207faaf84885c3e49c61

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C:\Windows\CTS.exe
Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

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