61bddd6894255b12d8e59e454a6294cbcfe6b9883e08c33f7950a787c8886d59

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240611-en
resource tags

arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
submitted
13/06/2024, 10:08

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General

Target
2024-06-13_b617ade738f5eab162d911cfbf1a47cb_bkransomware.exe
Size 518KB
Sample240613-l6afpsyapr
SHA256 61bddd6894255b12d8e59e454a6294cbcfe6b9883e08c33f7950a787c8886d59
MD5 b617ade738f5eab162d911cfbf1a47cb
SHA1 c7a244dc7782517e3c450164be9502cd9a8a3213
SHA512 5d6217dec7978e199e89340f2b5cbc3d48e22b8e457a70e9232add773ff76a2b8ddfe5a9295abadec33102bee81a815943ac35c19976a213180d0e4fab01f952
SSDEEP 12288:hS07XdQjp8UrxwMnxLSgob4ylbf8o7h/qonU5Z5T:D7IxwMxNMPljd9khT
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
1740	OyyQXwWABzny9rw.exe
4508	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

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"	2024-06-13_b617ade738f5eab162d911cfbf1a47cb_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	2024-06-13_b617ade738f5eab162d911cfbf1a47cb_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5116	2024-06-13_b617ade738f5eab162d911cfbf1a47cb_bkransomware.exe
Token: SeDebugPrivilege	4508	CTS.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5116 wrote to memory of 1740	5116	2024-06-13_b617ade738f5eab162d911cfbf1a47cb_bkransomware.exe	83
PID 5116 wrote to memory of 1740	5116	2024-06-13_b617ade738f5eab162d911cfbf1a47cb_bkransomware.exe	83
PID 5116 wrote to memory of 1740	5116	2024-06-13_b617ade738f5eab162d911cfbf1a47cb_bkransomware.exe	83
PID 5116 wrote to memory of 4508	5116	2024-06-13_b617ade738f5eab162d911cfbf1a47cb_bkransomware.exe	84
PID 5116 wrote to memory of 4508	5116	2024-06-13_b617ade738f5eab162d911cfbf1a47cb_bkransomware.exe	84
PID 5116 wrote to memory of 4508	5116	2024-06-13_b617ade738f5eab162d911cfbf1a47cb_bkransomware.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-06-13_b617ade738f5eab162d911cfbf1a47cb_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-13_b617ade738f5eab162d911cfbf1a47cb_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5116
- C:\Users\Admin\AppData\Local\Temp\OyyQXwWABzny9rw.exe
  C:\Users\Admin\AppData\Local\Temp\OyyQXwWABzny9rw.exe
  2⤵
  - Executes dropped EXE
  PID:1740
- 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:4508

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

excel.exe_Rules.xml

Path C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Size 393KB
SHA256 78342f42d9d39733e08844a193ab8f3cb2034bd19a3737d1b689e92e55545677
MD5 5da9f5fc1283fa67aa1214a3eda35450
SHA1 c8ef4be4057176095622760dcdff020dc8c1d9a0
SHA512 188aa992b3f859c9809ecb7c936386b3efe2acaf1567940a5a09f04947795fda35f9cdea1b28078e2ab747983467458928c8d00a62d6fedb02736ae4c4e5d93e
SSDEEP 12288:hS0cuV2Dxk9Mi/V9yx0CPIpnVlVAxurqz1hYpFrKW:DqDxk+imxypfidhhYpFrt
MD5 SHA1 SHA512 SSDEEP

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OyyQXwWABzny9rw.exe

Path C:\Users\Admin\AppData\Local\Temp\OyyQXwWABzny9rw.exe
Size 447KB
SHA256 cd8e84c1f8d1ee3a7014343e3fb236329d2b67c1ec233ea4b208d99e3f95105b
MD5 3f461ca3e3d9da036cf1a4a06ddf4fb4
SHA1 15395e4b656cee3a708bc50c1094e3fa0c46802e
SHA512 d0cb3f56db648c9ee151990260a864cdcd0d508a1dafcd741d8b2ccd8f73ba29607f384a4e2752502419cfd4a41d2288d7c3ffec93925be85fc39dad9c01e7f5
SSDEEP 12288:75NaIk7nsp5pahQ2hkhsYvCpJZ2u4Tsgm/:75lB2hkhfvCpf2fTf
MD5 SHA1 SHA512 SSDEEP

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CTS.exe

Path C:\Windows\CTS.exe
Size 71KB
SHA256 075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
MD5 66df4ffab62e674af2e75b163563fc0b
SHA1 dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA512 1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25
SSDEEP 1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazT:ZhpAyazIlyazT
MD5 SHA1 SHA512 SSDEEP

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads