36d8a4369922f9ff965bc763a9f8ee775b4e4377fcd0d60ffdd58e742209f5d4

Analysis

max time kernel
119s
max time network
119s
platform
windows7_x64
resource
win7-en-20211208
submitted
28/01/2022, 08:30

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General

Target
LVvoucher.exe
Size 779KB
Sample220128-kd64jaade3
SHA256 77604e2646be4fb59a16e33ca5e78a73ec5045b8f1cce6f5ba16c11304b1c2ee
MD5 4f2cf362036af705349843df3419ae5d
SHA1 49dfd4b26e8c9f2cc76df24c55e6616f438bf422
SHA512 8b5682f5955cdb1e1218735d100234f571f27a2b793cedd68572e8e62a1cef0cf716327b44fbaa3f29bc792a5e842bbfc8320ed175580333dc57eff8cf7fb586
MD5 SHA1 SHA512

Score

3^/10

Malware Config

Signatures

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
428	schtasks.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
1892	LVvoucher.exe
1892	LVvoucher.exe
1892	LVvoucher.exe
1892	LVvoucher.exe
1892	LVvoucher.exe
1892	LVvoucher.exe
1892	LVvoucher.exe
1892	LVvoucher.exe
1892	LVvoucher.exe
1892	LVvoucher.exe
1116	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1892	LVvoucher.exe
Token: SeDebugPrivilege	1116	powershell.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 1892 wrote to memory of 1116	1892	LVvoucher.exe	29
PID 1892 wrote to memory of 1116	1892	LVvoucher.exe	29
PID 1892 wrote to memory of 1116	1892	LVvoucher.exe	29
PID 1892 wrote to memory of 1116	1892	LVvoucher.exe	29
PID 1892 wrote to memory of 428	1892	LVvoucher.exe	31
PID 1892 wrote to memory of 428	1892	LVvoucher.exe	31
PID 1892 wrote to memory of 428	1892	LVvoucher.exe	31
PID 1892 wrote to memory of 428	1892	LVvoucher.exe	31
PID 1892 wrote to memory of 1524	1892	LVvoucher.exe	33
PID 1892 wrote to memory of 1524	1892	LVvoucher.exe	33
PID 1892 wrote to memory of 1524	1892	LVvoucher.exe	33
PID 1892 wrote to memory of 1524	1892	LVvoucher.exe	33
PID 1892 wrote to memory of 1484	1892	LVvoucher.exe	34
PID 1892 wrote to memory of 1484	1892	LVvoucher.exe	34
PID 1892 wrote to memory of 1484	1892	LVvoucher.exe	34
PID 1892 wrote to memory of 1484	1892	LVvoucher.exe	34
PID 1892 wrote to memory of 1456	1892	LVvoucher.exe	35
PID 1892 wrote to memory of 1456	1892	LVvoucher.exe	35
PID 1892 wrote to memory of 1456	1892	LVvoucher.exe	35
PID 1892 wrote to memory of 1456	1892	LVvoucher.exe	35
PID 1892 wrote to memory of 1732	1892	LVvoucher.exe	37
PID 1892 wrote to memory of 1732	1892	LVvoucher.exe	37
PID 1892 wrote to memory of 1732	1892	LVvoucher.exe	37
PID 1892 wrote to memory of 1732	1892	LVvoucher.exe	37
PID 1892 wrote to memory of 1984	1892	LVvoucher.exe	36
PID 1892 wrote to memory of 1984	1892	LVvoucher.exe	36
PID 1892 wrote to memory of 1984	1892	LVvoucher.exe	36
PID 1892 wrote to memory of 1984	1892	LVvoucher.exe	36

C:\Users\Admin\AppData\Local\Temp\LVvoucher.exe
"C:\Users\Admin\AppData\Local\Temp\LVvoucher.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1892
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\UcgxBJ.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1116
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\UcgxBJ" /XML "C:\Users\Admin\AppData\Local\Temp\tmpBB4.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:428
- C:\Users\Admin\AppData\Local\Temp\LVvoucher.exe
  "C:\Users\Admin\AppData\Local\Temp\LVvoucher.exe"
  2⤵
  PID:1524
- C:\Users\Admin\AppData\Local\Temp\LVvoucher.exe
  "C:\Users\Admin\AppData\Local\Temp\LVvoucher.exe"
  2⤵
  PID:1484
- C:\Users\Admin\AppData\Local\Temp\LVvoucher.exe
  "C:\Users\Admin\AppData\Local\Temp\LVvoucher.exe"
  2⤵
  PID:1456
- C:\Users\Admin\AppData\Local\Temp\LVvoucher.exe
  "C:\Users\Admin\AppData\Local\Temp\LVvoucher.exe"
  2⤵
  PID:1984
- C:\Users\Admin\AppData\Local\Temp\LVvoucher.exe
  "C:\Users\Admin\AppData\Local\Temp\LVvoucher.exe"
  2⤵
  PID:1732

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1116-61-0x0000000002640000-0x000000000328A000-memory.dmp

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memory/1116-62-0x0000000002640000-0x000000000328A000-memory.dmp

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memory/1116-63-0x0000000002640000-0x000000000328A000-memory.dmp

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memory/1892-54-0x0000000000350000-0x000000000041A000-memory.dmp

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memory/1892-55-0x0000000076C61000-0x0000000076C63000-memory.dmp

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memory/1892-56-0x0000000004E90000-0x0000000004E91000-memory.dmp

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memory/1892-57-0x0000000000450000-0x000000000045C000-memory.dmp

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memory/1892-58-0x00000000052E0000-0x000000000534A000-memory.dmp

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