d5936fd3ae113295e9d99ae71896a3ef52dbf5d51b3048a0b54d4530d96c84eb

General

Target

2024-05-28_daf2881014370bbea082e75542c87e2c_bkransomware.exe
Size

359KB
MD5

daf2881014370bbea082e75542c87e2c
SHA1

dad818912acb6f7fd3c88d829b08576a5194b366
SHA256

d5936fd3ae113295e9d99ae71896a3ef52dbf5d51b3048a0b54d4530d96c84eb
SHA512

9fd12f1884ddf67cdd0dba71f5d9727cf40a29fbdeb654916901ed81a65bd7d1899e456ad6f08d56cec16cd9732e556edd718b7c39944d5c422789d307a9522c
SSDEEP

6144:xZ8azTi1gAq5Bd7Ia3q+RXVQ27yX+t5+XeCZYpDiUhvd4L8uh/pec:xC0TeQzI+3tVQ2k+As2ovcZ1

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 3 IoCs

pid	Process
1036	aU17vgpdm8QtzWd.exe
3772	CTS.exe
4992	dxwsetup.exe

Loads dropped DLL 2 IoCs

pid	Process
4992	dxwsetup.exe
4992	dxwsetup.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 3 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\RunOnce\wextract_cleanup0 = "rundll32.exe C:\\Windows\\system32\\advpack.dll,DelNodeRunDLL32 \"C:\\Users\\Admin\\AppData\\Local\\Temp\\IXP000.TMP\\\""	aU17vgpdm8QtzWd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-28_daf2881014370bbea082e75542c87e2c_bkransomware.exe

Drops file in System32 directory 7 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\directx\websetup\dsetup32.dll	dxwsetup.exe
File opened for modification	C:\Windows\SysWOW64\DirectX\WebSetup	dxwsetup.exe
File opened for modification	C:\Windows\SysWOW64\directx\websetup\SET756E.tmp	dxwsetup.exe
File created	C:\Windows\SysWOW64\directx\websetup\SET756E.tmp	dxwsetup.exe
File opened for modification	C:\Windows\SysWOW64\directx\websetup\dsetup.dll	dxwsetup.exe
File opened for modification	C:\Windows\SysWOW64\directx\websetup\SET758F.tmp	dxwsetup.exe
File created	C:\Windows\SysWOW64\directx\websetup\SET758F.tmp	dxwsetup.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\CTS.exe	2024-05-28_daf2881014370bbea082e75542c87e2c_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe
File opened for modification	C:\Windows\Logs\DirectX.log	dxwsetup.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2620	2024-05-28_daf2881014370bbea082e75542c87e2c_bkransomware.exe
Token: SeDebugPrivilege	3772	CTS.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2620 wrote to memory of 1036	2620	2024-05-28_daf2881014370bbea082e75542c87e2c_bkransomware.exe	83
PID 2620 wrote to memory of 1036	2620	2024-05-28_daf2881014370bbea082e75542c87e2c_bkransomware.exe	83
PID 2620 wrote to memory of 1036	2620	2024-05-28_daf2881014370bbea082e75542c87e2c_bkransomware.exe	83
PID 2620 wrote to memory of 3772	2620	2024-05-28_daf2881014370bbea082e75542c87e2c_bkransomware.exe	84
PID 2620 wrote to memory of 3772	2620	2024-05-28_daf2881014370bbea082e75542c87e2c_bkransomware.exe	84
PID 2620 wrote to memory of 3772	2620	2024-05-28_daf2881014370bbea082e75542c87e2c_bkransomware.exe	84
PID 1036 wrote to memory of 4992	1036	aU17vgpdm8QtzWd.exe	85
PID 1036 wrote to memory of 4992	1036	aU17vgpdm8QtzWd.exe	85
PID 1036 wrote to memory of 4992	1036	aU17vgpdm8QtzWd.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-05-28_daf2881014370bbea082e75542c87e2c_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-28_daf2881014370bbea082e75542c87e2c_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2620
- C:\Users\Admin\AppData\Local\Temp\aU17vgpdm8QtzWd.exe
  C:\Users\Admin\AppData\Local\Temp\aU17vgpdm8QtzWd.exe
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:1036
- - C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\dxwsetup.exe
    C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\dxwsetup.exe
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Drops file in System32 directory
    - Drops file in Windows directory
    PID:4992
- 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:3772

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml

Filesize
392KB

MD5
b0f9864b8d19904e25f86d0a4b03aab1

SHA1
69ef8ca180597d529a55b70fc2ebd7d3a58cdf67

SHA256
c761afffd3a0dffa0cb938b070ea0ab9dacdb1ae34121aa55abef56902ded18f

SHA512
9f9635c009cca077949a36e2843ca9cbe155f97f5b3906122beffe71058fed7dab89ba3bd7550f4f8abe9d4e4ad2b304ce1d41cf3dcfb78b48ab7ddabe76122c

Download Submit
C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\dsetup.dll

Filesize
93KB

MD5
984cad22fa542a08c5d22941b888d8dc

SHA1
3e3522e7f3af329f2235b0f0850d664d5377b3cd

SHA256
57bc22850bb8e0bcc511a9b54cd3da18eec61f3088940c07d63b9b74e7fe2308

SHA512
8ef171218b331f0591a4b2a5e68dcbae98f5891518ce877f1d8d1769c59c0f4ddae43cc43da6606975078f889c832f0666484db9e047782e7a0ae4a2d41f5bef

Download Submit
C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\dsetup32.dll

Filesize
1.5MB

MD5
a5412a144f63d639b47fcc1ba68cb029

SHA1
81bd5f1c99b22c0266f3f59959dfb4ea023be47e

SHA256
8a011da043a4b81e2b3d41a332e0ff23a65d546bd7636e8bc74885e8746927d6

SHA512
2679a4cb690e8d709cb5e57b59315d22f69f91efa6c4ee841943751c882b0c0457fd4a3376ac3832c757c6dfaffb7d844909c5665b86a95339af586097ee0405

Download Submit
C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\dxwsetup.exe

Filesize
515KB

MD5
ac3a5f7be8cd13a863b50ab5fe00b71c

SHA1
eee417cd92e263b84dd3b5dcc2b4b463fe6e84d9

SHA256
8f5e89298e3dc2e22d47515900c37cca4ee121c5ba06a6d962d40ad6e1a595da

SHA512
c8bbe791373dad681f0ac9f5ab538119bde685d4f901f5db085c73163fc2e868972b2de60e72ccd44f745f1fd88fcde2e27f32302d8cbd3c1f43e6e657c79fba

Download Submit
C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\dxwsetup.inf

Filesize
477B

MD5
ad8982eaa02c7ad4d7cdcbc248caa941

SHA1
4ccd8e038d73a5361d754c7598ed238fc040d16b

SHA256
d63c35e9b43eb0f28ffc28f61c9c9a306da9c9de3386770a7eb19faa44dbfc00

SHA512
5c805d78bafff06c36b5df6286709ddf2d36808280f92e62dc4c285edd9176195a764d5cf0bb000da53ca8bbf66ddd61d852e4259e3113f6529e2d7bdbdd6e28

Download Submit
C:\Users\Admin\AppData\Local\Temp\aU17vgpdm8QtzWd.exe

Filesize
288KB

MD5
2cbd6ad183914a0c554f0739069e77d7

SHA1
7bf35f2afca666078db35ca95130beb2e3782212

SHA256
2cf71d098c608c56e07f4655855a886c3102553f648df88458df616b26fd612f

SHA512
ff1af2d2a883865f2412dddcd68006d1907a719fe833319c833f897c93ee750bac494c0991170dc1cf726b3f0406707daa361d06568cd610eeb4ed1d9c0fbb10

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads