f41e4801b3d6e727d339a3b21535a705824e1f44e9ce00f3586335b82d00e3c7

General

Target

2024-04-29_73069e0f491358f7dfae0edb0da33a06_bkransomware.exe
Size

135KB
MD5

73069e0f491358f7dfae0edb0da33a06
SHA1

29ac4914a4fa37e3712f16301dac76bba2ee943b
SHA256

f41e4801b3d6e727d339a3b21535a705824e1f44e9ce00f3586335b82d00e3c7
SHA512

9bd1f2aaa9fd0f5005734de1cbf43cfc426831254a02d72b223ef10d42b33ca411a9ae2e2081f7e5281bc2e6841b17a22e3f8867144ae17698428776e280f6a8
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazT8eX+F4ymoWXzBsxlLdLV+Q6fWoqUTb:ZhpAyazIlyazTTfoWuxp9VoeyIL/07

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
1940	2w3qvvB4fiGJeKT.exe
1624	CTS.exe

Loads dropped DLL 2 IoCs

pid	Process
1660	2024-04-29_73069e0f491358f7dfae0edb0da33a06_bkransomware.exe
1660	2024-04-29_73069e0f491358f7dfae0edb0da33a06_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"	2024-04-29_73069e0f491358f7dfae0edb0da33a06_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	2024-04-29_73069e0f491358f7dfae0edb0da33a06_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1660	2024-04-29_73069e0f491358f7dfae0edb0da33a06_bkransomware.exe
Token: SeDebugPrivilege	1624	CTS.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1660 wrote to memory of 1940	1660	2024-04-29_73069e0f491358f7dfae0edb0da33a06_bkransomware.exe	28
PID 1660 wrote to memory of 1940	1660	2024-04-29_73069e0f491358f7dfae0edb0da33a06_bkransomware.exe	28
PID 1660 wrote to memory of 1940	1660	2024-04-29_73069e0f491358f7dfae0edb0da33a06_bkransomware.exe	28
PID 1660 wrote to memory of 1940	1660	2024-04-29_73069e0f491358f7dfae0edb0da33a06_bkransomware.exe	28
PID 1660 wrote to memory of 1624	1660	2024-04-29_73069e0f491358f7dfae0edb0da33a06_bkransomware.exe	29
PID 1660 wrote to memory of 1624	1660	2024-04-29_73069e0f491358f7dfae0edb0da33a06_bkransomware.exe	29
PID 1660 wrote to memory of 1624	1660	2024-04-29_73069e0f491358f7dfae0edb0da33a06_bkransomware.exe	29
PID 1660 wrote to memory of 1624	1660	2024-04-29_73069e0f491358f7dfae0edb0da33a06_bkransomware.exe	29

C:\Users\Admin\AppData\Local\Temp\2024-04-29_73069e0f491358f7dfae0edb0da33a06_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-29_73069e0f491358f7dfae0edb0da33a06_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:1660
- C:\Users\Admin\AppData\Local\Temp\2w3qvvB4fiGJeKT.exe
  C:\Users\Admin\AppData\Local\Temp\2w3qvvB4fiGJeKT.exe
  2⤵
  - Executes dropped EXE
  PID:1940
- 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:1624

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\2w3qvvB4fiGJeKT.exe

Filesize
135KB

MD5
e71645572ce70dd687faebc1a403f9ad

SHA1
c4e99dcfec0519607b9792832f07c786bdec8531

SHA256
301c4d495baea7cfd8b1f698702ed2a62cb3649f6fed89207645fb91f7408796

SHA512
9beb87131bdb49f1fcad1f3dbd677eb0fa018b2ec632b874acfb6bfc5d6e0e691b8228290cfe7fb5573f4f1013f21df01bf44d2cbb65c7db0ab10f1e2866a64b

Download Submit
C:\Users\Admin\AppData\Local\Temp\2w3qvvB4fiGJeKT.exe

Filesize
64KB

MD5
e97c622b03fb2a2598bf019fbbe29f2c

SHA1
32698bd1d3a0ff6cf441770d1b2b816285068d19

SHA256
5c1af46c7300e87a73dacf6cf41ce397e3f05df6bd9c7e227b4ac59f85769160

SHA512
db70c62fb35a8e5b005f13b57c1ebbf6c465f6ff0524422294c43e27fb4aa79379dc1e300ad11dc2354405c43b192ae06b91c0f525a1f2617e4d14673651a87d

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads