30daff20d895e395379b77e7572724915f1180b5140754ab706f262d6b8a7403

General

Target

2024-05-24_3d987fd031a4ac33a4bc130dd168bc4d_bkransomware.exe
Size

135KB
MD5

3d987fd031a4ac33a4bc130dd168bc4d
SHA1

8e46555e6647ed2350ceaaea94bbc3b3e40b39ff
SHA256

30daff20d895e395379b77e7572724915f1180b5140754ab706f262d6b8a7403
SHA512

01c7f419c6f57734f53d671bf1d3dec46c62f93b152b88d326abe59f599525a5b74b82b4ee3cc2192ab14ad6bdd3b26ea7d5b6c1e87fb12eaa6cdd84720253bf
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTw4Cqbz2KIKfLJgsJeRrHFQI5uVKEVW:ZRpAyazIliazTwMb6/KfacqVEV2wRHC

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
1948	6u5oJygq0pU45tY.exe
2932	CTS.exe

Loads dropped DLL 2 IoCs

pid	Process
2428	2024-05-24_3d987fd031a4ac33a4bc130dd168bc4d_bkransomware.exe
2428	2024-05-24_3d987fd031a4ac33a4bc130dd168bc4d_bkransomware.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

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"	2024-05-24_3d987fd031a4ac33a4bc130dd168bc4d_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

description	ioc	Process
File created	C:\Windows\CTS.exe	2024-05-24_3d987fd031a4ac33a4bc130dd168bc4d_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2428	2024-05-24_3d987fd031a4ac33a4bc130dd168bc4d_bkransomware.exe
Token: SeDebugPrivilege	2932	CTS.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2428 wrote to memory of 1948	2428	2024-05-24_3d987fd031a4ac33a4bc130dd168bc4d_bkransomware.exe	28
PID 2428 wrote to memory of 1948	2428	2024-05-24_3d987fd031a4ac33a4bc130dd168bc4d_bkransomware.exe	28
PID 2428 wrote to memory of 1948	2428	2024-05-24_3d987fd031a4ac33a4bc130dd168bc4d_bkransomware.exe	28
PID 2428 wrote to memory of 1948	2428	2024-05-24_3d987fd031a4ac33a4bc130dd168bc4d_bkransomware.exe	28
PID 2428 wrote to memory of 2932	2428	2024-05-24_3d987fd031a4ac33a4bc130dd168bc4d_bkransomware.exe	30
PID 2428 wrote to memory of 2932	2428	2024-05-24_3d987fd031a4ac33a4bc130dd168bc4d_bkransomware.exe	30
PID 2428 wrote to memory of 2932	2428	2024-05-24_3d987fd031a4ac33a4bc130dd168bc4d_bkransomware.exe	30
PID 2428 wrote to memory of 2932	2428	2024-05-24_3d987fd031a4ac33a4bc130dd168bc4d_bkransomware.exe	30

C:\Users\Admin\AppData\Local\Temp\2024-05-24_3d987fd031a4ac33a4bc130dd168bc4d_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-24_3d987fd031a4ac33a4bc130dd168bc4d_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:2428
- C:\Users\Admin\AppData\Local\Temp\6u5oJygq0pU45tY.exe
  C:\Users\Admin\AppData\Local\Temp\6u5oJygq0pU45tY.exe
  2⤵
  - Executes dropped EXE
  PID:1948
- 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:2932

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\6u5oJygq0pU45tY.exe

Filesize
135KB

MD5
8fc42976ae9be3193d838a352c33bd08

SHA1
5c9049de1b1984799f02bafe98d6c4c6142b8c8b

SHA256
c86c44b55b7831a9906630be7648508da61e8d6af452423902ea59144d930cc7

SHA512
3872f49acae91a610c085997038a68e022727d314f27c78e0b71ac3843db4c381f126754922204a81aec21e8313833d95ade84596d6b3642836e353769100d2d

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit
\Users\Admin\AppData\Local\Temp\6u5oJygq0pU45tY.exe

Filesize
64KB

MD5
a32a382b8a5a906e03a83b4f3e5b7a9b

SHA1
11e2bdd0798761f93cce363329996af6c17ed796

SHA256
75f12ea2f30d9c0d872dade345f30f562e6d93847b6a509ba53beec6d0b2c346

SHA512
ec87dd957be21b135212454646dcabdd7ef9442cf714e2c1f6b42b81f0c3fa3b1875bde9a8b538e8a0aa2190225649c29e9ed0f25176e7659e55e422dd4efe4c

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads