2f510e3edc938ef4f85f799b5ac9eb48faaac3251916e3b3380a2e41da9f27f7

General

Target

2024-05-09_3155c4ed35fe3e7903a292afa6bc99b1_bkransomware.exe
Size

96KB
MD5

3155c4ed35fe3e7903a292afa6bc99b1
SHA1

61d8a21a54f07d5b2b60429f764a8bfa7becabf5
SHA256

2f510e3edc938ef4f85f799b5ac9eb48faaac3251916e3b3380a2e41da9f27f7
SHA512

961ee2ce2be30f4bee1b7038ba4f7835962423433f74b74249eb6d82637e918d1a7bf4bff6023b4bc891740edaa8968c3810e10167da3db6fa0f81d8ba824364
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazT3njDZxQPhL3ETmf3:ZhpAyazIlyazT3nPZxQPNUTo

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
2144	eEfncLlT4NQYIN3.exe
1904	CTS.exe

Loads dropped DLL 3 IoCs

pid	Process
2032	2024-05-09_3155c4ed35fe3e7903a292afa6bc99b1_bkransomware.exe
2032	2024-05-09_3155c4ed35fe3e7903a292afa6bc99b1_bkransomware.exe
1056	Process not Found

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

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	CTS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-09_3155c4ed35fe3e7903a292afa6bc99b1_bkransomware.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\CTS.exe	2024-05-09_3155c4ed35fe3e7903a292afa6bc99b1_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2032	2024-05-09_3155c4ed35fe3e7903a292afa6bc99b1_bkransomware.exe
Token: SeDebugPrivilege	1904	CTS.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2032 wrote to memory of 2144	2032	2024-05-09_3155c4ed35fe3e7903a292afa6bc99b1_bkransomware.exe	28
PID 2032 wrote to memory of 2144	2032	2024-05-09_3155c4ed35fe3e7903a292afa6bc99b1_bkransomware.exe	28
PID 2032 wrote to memory of 2144	2032	2024-05-09_3155c4ed35fe3e7903a292afa6bc99b1_bkransomware.exe	28
PID 2032 wrote to memory of 2144	2032	2024-05-09_3155c4ed35fe3e7903a292afa6bc99b1_bkransomware.exe	28
PID 2032 wrote to memory of 1904	2032	2024-05-09_3155c4ed35fe3e7903a292afa6bc99b1_bkransomware.exe	30
PID 2032 wrote to memory of 1904	2032	2024-05-09_3155c4ed35fe3e7903a292afa6bc99b1_bkransomware.exe	30
PID 2032 wrote to memory of 1904	2032	2024-05-09_3155c4ed35fe3e7903a292afa6bc99b1_bkransomware.exe	30
PID 2032 wrote to memory of 1904	2032	2024-05-09_3155c4ed35fe3e7903a292afa6bc99b1_bkransomware.exe	30

C:\Users\Admin\AppData\Local\Temp\2024-05-09_3155c4ed35fe3e7903a292afa6bc99b1_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-09_3155c4ed35fe3e7903a292afa6bc99b1_bkransomware.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2032
- C:\Users\Admin\AppData\Local\Temp\eEfncLlT4NQYIN3.exe
  C:\Users\Admin\AppData\Local\Temp\eEfncLlT4NQYIN3.exe
  2⤵
  - Executes dropped EXE
  PID:2144
- 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:1904

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\eEfncLlT4NQYIN3.exe

Filesize
96KB

MD5
2b55a504c8b9e4d960c49609daeb7eaa

SHA1
d62298cabcee23d46a2c320de214f85eef866408

SHA256
3864090c3fe0805ae40d10af6fd9b6a03f41329cd696ec1e5762f641a81bd722

SHA512
9e79093bcc95fc9a8a40f96a8ebf16ff936c499b2712907e8304a6df771a16e70ac795793f8c28eee777441aa2944b7d440faaea1b2ca5774c14cc2c90451465

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit
\Users\Admin\AppData\Local\Temp\eEfncLlT4NQYIN3.exe

Filesize
25KB

MD5
abbd49c180a2f8703f6306d6fa731fdc

SHA1
d63f4bfe7f74936b2fbace803e3da6103fbf6586

SHA256
5f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1

SHA512
290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9

Download Submit
memory/2144-15-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads