68f99fe749bea2b2cc835c34ac1818ec136f38c2e5eca18008e643f42a9912bc

Analysis

max time kernel
50s
max time network
40s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
13/02/2023, 06:51

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General

Target

krnl_bootstrapper (1).exe
Size

1.3MB
MD5

028879728f52bc807dada3afa79d9f25
SHA1

ce285fcd92bb5a2aa74041950887fe8602575487
SHA256

68f99fe749bea2b2cc835c34ac1818ec136f38c2e5eca18008e643f42a9912bc
SHA512

11a9ec3d1f77e7c58c8b548cbf92075b9ffd3086c1e3ee8a7317be9c3da161ce4f6fe4acad85909b816c732c8688a4e264672f5fa67b2027ebbadb7a59d5cfec
SSDEEP

24576:qQU7ecSgL6y+gk+rnxdarF9nq5VrnHugIJ96FTx4XclQ:qQUzS65+x+rnxYrC5VrnOgIqUXcS

Score

8^/10

Malware Config

Signatures

Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
1336	krnl_console_bootstrapper.exe

Loads dropped DLL 1 IoCs

pid	Process
1096	krnl_bootstrapper (1).exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1096	krnl_bootstrapper (1).exe
1336	krnl_console_bootstrapper.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
1096	krnl_bootstrapper (1).exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1096	krnl_bootstrapper (1).exe
Token: SeDebugPrivilege	1336	krnl_console_bootstrapper.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1096 wrote to memory of 1336	1096	krnl_bootstrapper (1).exe	29
PID 1096 wrote to memory of 1336	1096	krnl_bootstrapper (1).exe	29
PID 1096 wrote to memory of 1336	1096	krnl_bootstrapper (1).exe	29
PID 1096 wrote to memory of 1336	1096	krnl_bootstrapper (1).exe	29

C:\Users\Admin\AppData\Local\Temp\krnl_bootstrapper (1).exe
"C:\Users\Admin\AppData\Local\Temp\krnl_bootstrapper (1).exe"
1⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: RenamesItself
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1096
- C:\Users\Admin\AppData\Local\Temp\krnl_console_bootstrapper.exe
  "C:\Users\Admin\AppData\Local\Temp\krnl_console_bootstrapper.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1336

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\krnl_console_bootstrapper.exe

Filesize
1.2MB

MD5
f14153bbd95fc26d9ccea77c49cf09b9

SHA1
cb59f900711ea751c4322b4dab50fa2c0ee70b33

SHA256
27eab496d0b63d52c18cee063110d9d479523b58426bfcb58e420a5cae087c54

SHA512
7f7618cf6f15d85e82cbfff07ca6e1df0aa763d64d6a37fb659f1612b950d16a15b723ec053765e991485e74a7301617019b166dcaa759ed6f1a281a9ebc4ed0

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

Filesize
1.2MB

MD5
f14153bbd95fc26d9ccea77c49cf09b9

SHA1
cb59f900711ea751c4322b4dab50fa2c0ee70b33

SHA256
27eab496d0b63d52c18cee063110d9d479523b58426bfcb58e420a5cae087c54

SHA512
7f7618cf6f15d85e82cbfff07ca6e1df0aa763d64d6a37fb659f1612b950d16a15b723ec053765e991485e74a7301617019b166dcaa759ed6f1a281a9ebc4ed0

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

Filesize
1.2MB

MD5
f14153bbd95fc26d9ccea77c49cf09b9

SHA1
cb59f900711ea751c4322b4dab50fa2c0ee70b33

SHA256
27eab496d0b63d52c18cee063110d9d479523b58426bfcb58e420a5cae087c54

SHA512
7f7618cf6f15d85e82cbfff07ca6e1df0aa763d64d6a37fb659f1612b950d16a15b723ec053765e991485e74a7301617019b166dcaa759ed6f1a281a9ebc4ed0

Download Submit
memory/1096-54-0x0000000000230000-0x0000000000382000-memory.dmp

Filesize
1.3MB

Download
memory/1096-55-0x0000000075671000-0x0000000075673000-memory.dmp

Filesize
8KB

Download
memory/1336-60-0x0000000000C20000-0x0000000000D4A000-memory.dmp

Filesize
1.2MB

Download
memory/1336-63-0x0000000000240000-0x000000000024A000-memory.dmp

Filesize
40KB

Download
memory/1336-62-0x0000000000240000-0x000000000024A000-memory.dmp

Filesize
40KB

Download
memory/1336-64-0x0000000004F45000-0x0000000004F56000-memory.dmp

Filesize
68KB

Download
memory/1336-66-0x0000000000240000-0x000000000024A000-memory.dmp

Filesize
40KB

Download
memory/1336-65-0x0000000000240000-0x000000000024A000-memory.dmp

Filesize
40KB

Download