55fbe70e6b731dcbb6668beb12bbdf1026b3f61501d308bd5c6f5f47758ff993

General

Target

2024-04-28_1b919658db32ffba06cd13ba0f230923_bkransomware.exe
Size

79.3MB
MD5

1b919658db32ffba06cd13ba0f230923
SHA1

591a32944a659b8013db49bfed0e04ac597f394f
SHA256

55fbe70e6b731dcbb6668beb12bbdf1026b3f61501d308bd5c6f5f47758ff993
SHA512

c10df8f3d9307e723a98bd8f2fdcc7ea1ef042c05412ab089e17b4a20c70309732f1f270cbf0ff1144436b0224eb25c4cd5cfd34022dae5db7baa01626791c61
SSDEEP

1572864:fj0sKNVvxxwV1quLKjKPQV4XA14OjY4fEeIKGvJupB8:/wVvnw6W0KPQ2utk4l+wB8

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 4 IoCs

pid	Process
2172	OA0Ot9TGr3LXzt6.exe
2036	CTS.exe
2544	OA0Ot9TGr3LXzt6.exe
1180	Process not Found

Loads dropped DLL 3 IoCs

pid	Process
2328	2024-04-28_1b919658db32ffba06cd13ba0f230923_bkransomware.exe
2172	OA0Ot9TGr3LXzt6.exe
1180	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"	2024-04-28_1b919658db32ffba06cd13ba0f230923_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	2024-04-28_1b919658db32ffba06cd13ba0f230923_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3452737119-3959686427-228443150-1000\Software\Microsoft\Internet Explorer\Main	OA0Ot9TGr3LXzt6.exe

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1553.004

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436	OA0Ot9TGr3LXzt6.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436\Blob = 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	OA0Ot9TGr3LXzt6.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2328	2024-04-28_1b919658db32ffba06cd13ba0f230923_bkransomware.exe
Token: SeDebugPrivilege	2036	CTS.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2544	OA0Ot9TGr3LXzt6.exe
2544	OA0Ot9TGr3LXzt6.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2328 wrote to memory of 2172	2328	2024-04-28_1b919658db32ffba06cd13ba0f230923_bkransomware.exe	28
PID 2328 wrote to memory of 2172	2328	2024-04-28_1b919658db32ffba06cd13ba0f230923_bkransomware.exe	28
PID 2328 wrote to memory of 2172	2328	2024-04-28_1b919658db32ffba06cd13ba0f230923_bkransomware.exe	28
PID 2328 wrote to memory of 2172	2328	2024-04-28_1b919658db32ffba06cd13ba0f230923_bkransomware.exe	28
PID 2328 wrote to memory of 2036	2328	2024-04-28_1b919658db32ffba06cd13ba0f230923_bkransomware.exe	29
PID 2328 wrote to memory of 2036	2328	2024-04-28_1b919658db32ffba06cd13ba0f230923_bkransomware.exe	29
PID 2328 wrote to memory of 2036	2328	2024-04-28_1b919658db32ffba06cd13ba0f230923_bkransomware.exe	29
PID 2328 wrote to memory of 2036	2328	2024-04-28_1b919658db32ffba06cd13ba0f230923_bkransomware.exe	29
PID 2172 wrote to memory of 2544	2172	OA0Ot9TGr3LXzt6.exe	30
PID 2172 wrote to memory of 2544	2172	OA0Ot9TGr3LXzt6.exe	30
PID 2172 wrote to memory of 2544	2172	OA0Ot9TGr3LXzt6.exe	30

C:\Users\Admin\AppData\Local\Temp\2024-04-28_1b919658db32ffba06cd13ba0f230923_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_1b919658db32ffba06cd13ba0f230923_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:2328
- C:\Users\Admin\AppData\Local\Temp\OA0Ot9TGr3LXzt6.exe
  C:\Users\Admin\AppData\Local\Temp\OA0Ot9TGr3LXzt6.exe
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:2172
- - C:\Users\Admin\AppData\Local\Temp\jds259398088.tmp\OA0Ot9TGr3LXzt6.exe
    "C:\Users\Admin\AppData\Local\Temp\jds259398088.tmp\OA0Ot9TGr3LXzt6.exe"
    3⤵
    - Executes dropped EXE
    - Modifies Internet Explorer settings
    - Modifies system certificate store
    - Suspicious use of SetWindowsHookEx
    PID:2544
- 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:2036

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

3

T1112

Subvert Trust Controls

1

T1553

Install Root Certificate

1

T1553.004

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\jds259398088.tmp\OA0Ot9TGr3LXzt6.exe

Filesize
78.8MB

MD5
2e984fc82add25bab8bd9b4e2bb83d0c

SHA1
8319d63c6b593b667f194f2ed2c9216cccaa3ee0

SHA256
25b6669a3cd944c3e80e2fe32267ade7347a44a371d964586bb18d94d2227b37

SHA512
a7526f328e3ea4fb901bf1f811463283be46327332fcafa69e36236451e2b568fcf383aaf313772143a5487faed3f2e9774fdd486d312f647a4a98e16e829fc9

Download Submit
C:\Users\Admin\AppData\Local\Temp\jusched.log

Filesize
3KB

MD5
97b82e3de06721e1f2c5846f8369479b

SHA1
a82db785ca41f8333fa3fa67f00b56b1650c7f29

SHA256
5a41bf464409fb466dabaa72e6d2549b45afa20dbeda5bf16ff5b50c991d2f4e

SHA512
c6ff96719f94cae1e803109702d8ab631abd5d0445db474c3c0290c6cf84bfaa7841bbf95314f40d44019e09cc89d2148cedc3f71d9f0c12fba2c6e2cb21e2f2

Download Submit
C:\Users\Admin\AppData\Local\Temp\jusched.log

Filesize
5KB

MD5
3148ee5135892b27c0f12c42d84a5efe

SHA1
d9b66ff1b7970677f9fae09b07e726be0d087af8

SHA256
3ef333725ff8f4fcc4885ef9aaf6f2127e2aeb56e93d46b1185b56a9706f5e32

SHA512
7bab1e61d4e48124fd0a1cc2bb9aa31e0c0fbea76d2ef228b9165cb2077b4bf0e6f562fd725e70b141f6b773872a889ffd702256770ab2eed6dc83d25e7195da

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit
\Users\Admin\AppData\Local\Temp\OA0Ot9TGr3LXzt6.exe

Filesize
79.2MB

MD5
608914d57c9476b6af49a545d042f4fc

SHA1
a7b9709bfae02ca7ef90c08d38152c12f83e864f

SHA256
3f3b8ecbb0808b15a811ca437767d09e73c04d465729fd1532e296903634461c

SHA512
5e6e9132e3d768f07e3a829743c7e793a60874875458c213a8cfd535d6861927192ffe48b26f127ee4c54ec28dfaf6183ddc36421e585711dd29d9a0b8e740f4

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads