d3e8b772b03e8177c7b50b8ecac3817072c2aec96a0b5560e6d709f1087e879f

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
24-05-2024 03:33

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General

Target

2024-05-24_327ab5fea63f26e9dc4c2f3ac76f5621_bkransomware.exe
Size

332KB
MD5

327ab5fea63f26e9dc4c2f3ac76f5621
SHA1

c552aec78becb323936ab373733b4ef798b52cd4
SHA256

d3e8b772b03e8177c7b50b8ecac3817072c2aec96a0b5560e6d709f1087e879f
SHA512

a4265b535a7c2f9b4df38bdccbf58ae83c6fd5839e536787320abe89100394e02420445f40f446d427928bd053bf2d18f8e5336a8f4a2a316b844cd84e077f51
SSDEEP

6144:hZMazgQXxl54OC2lmuwNRy7yE0ryJI3LakmfV+fAukb59iFoAOGL6l0Jz:hS0HD5mu24WE05Lak2ofhkHQPl6l0Jz

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

iElGW5ytZhxm0dk.exeCTS.exe

pid process

3300 iElGW5ytZhxm0dk.exe
744 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
3300	iElGW5ytZhxm0dk.exe
744	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-05-24_327ab5fea63f26e9dc4c2f3ac76f5621_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-24_327ab5fea63f26e9dc4c2f3ac76f5621_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:

2024-05-24_327ab5fea63f26e9dc4c2f3ac76f5621_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-24_327ab5fea63f26e9dc4c2f3ac76f5621_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-24_327ab5fea63f26e9dc4c2f3ac76f5621_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 1792 2024-05-24_327ab5fea63f26e9dc4c2f3ac76f5621_bkransomware.exe
Token: SeDebugPrivilege 744 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-24_327ab5fea63f26e9dc4c2f3ac76f5621_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	1792	2024-05-24_327ab5fea63f26e9dc4c2f3ac76f5621_bkransomware.exe
Token: SeDebugPrivilege	744	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

2024-05-24_327ab5fea63f26e9dc4c2f3ac76f5621_bkransomware.exe

description	pid	process	target process
PID 1792 wrote to memory of 3300	1792	2024-05-24_327ab5fea63f26e9dc4c2f3ac76f5621_bkransomware.exe	iElGW5ytZhxm0dk.exe
PID 1792 wrote to memory of 3300	1792	2024-05-24_327ab5fea63f26e9dc4c2f3ac76f5621_bkransomware.exe	iElGW5ytZhxm0dk.exe
PID 1792 wrote to memory of 744	1792	2024-05-24_327ab5fea63f26e9dc4c2f3ac76f5621_bkransomware.exe	CTS.exe
PID 1792 wrote to memory of 744	1792	2024-05-24_327ab5fea63f26e9dc4c2f3ac76f5621_bkransomware.exe	CTS.exe
PID 1792 wrote to memory of 744	1792	2024-05-24_327ab5fea63f26e9dc4c2f3ac76f5621_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-24_327ab5fea63f26e9dc4c2f3ac76f5621_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-24_327ab5fea63f26e9dc4c2f3ac76f5621_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1792

C:\Users\Admin\AppData\Local\Temp\iElGW5ytZhxm0dk.exe
C:\Users\Admin\AppData\Local\Temp\iElGW5ytZhxm0dk.exe
2⤵
- Executes dropped EXE
PID:3300

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:744

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

MD5
bfc35c493ddf821e4617aed9297f0cc2

SHA1
a03a8a80a9ba86aa19259a7836dd22986d8531ba

SHA256
c57111402ea8f199ab17e93c6c528dff43094cc3bfa3a457fbe62733d299e34c

SHA512
d8e6c7ca7a9750f5cab215a0666428ee73fc4a72d293f6f2d92202e66aadde6cc9034be2cf0c39f7a49e2aad4484f3702a0d932daeacee2f35bee894892f2a04

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C:\Users\Admin\AppData\Local\Temp\iElGW5ytZhxm0dk.exe
Filesize
332KB

MD5
c971a111ad4abace025e6bb0e4b8a9cc

SHA1
847caee06e9a7fb8c7fa3da40295731c71c08dd3

SHA256
d4be35bbfcc4a20e762583e5c530622d8bb162d10ae9bdf6322d12a1eeece8fe

SHA512
b625b1bb02024821729d48437fc2cd0f5b1040c6b2bb0aa3dd148ba9fbd8e8ee94a306a2d0442158becf09429993d004c346076631f4fa5fb55b4e015def2609

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C:\Users\Admin\AppData\Local\Temp\iElGW5ytZhxm0dk.exe
Filesize
261KB

MD5
9dce6a120d094e5c925b967c4bb36277

SHA1
1ab60840e8d8ed14619fab2d1559f989f01f01a9

SHA256
3052784f3683c2bbe95f59560eb311e75f1eac7aa5476a91bbd9fe4d2aef880a

SHA512
20a7a4b8ecb1262ed730c8299ad0ada2ad93327f0886e5fdefc89564ff7510595ec53ac5aa88747e0548315c3037125d83756e3ae4d9a813cc553c12991c94df

Download Submit
C:\Windows\CTS.exe
Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit