c2365436a67ec76dc90b2f6d4fdf55ff9066d166754c5bc9ff7d5a6901f81aa4

Analysis

max time kernel
143s
max time network
157s
platform
windows10_x64
resource
win10v20210408
submitted
16/07/2021, 20:06

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General

Target
05AB720BBE85744CF1CBDAB2AA91BCFF.exe
Size 963KB
Sample210716-cqd28dc2v2
SHA256 c2365436a67ec76dc90b2f6d4fdf55ff9066d166754c5bc9ff7d5a6901f81aa4
MD5 05ab720bbe85744cf1cbdab2aa91bcff
SHA1 18c9839ce9656bbf617a2687b880794371567398
SHA512 051e5ad3e17ab49e77fa59f994b76f70c58b60108a041a8ba54b3ad997b3be0d81ebda338d420734564b49c8075799cc1f0e33912fd32b2f117d7e8a0a441095
MD5 SHA1 SHA512

Score

8^/10

spyware stealer vmprotect

Malware Config

Signatures

Executes dropped EXE 3 IoCs

pid	Process
4056	intoSessionbrokermonitordhcpWinRefnet.exe
2200	intoSessionbrokermonitordhcpWinRefnet.exe
2120	winlogon.exe

VMProtect packed file 6 IoCs

Detects executables packed with VMProtect commercial packer.

vmprotect

resource	yara_rule
behavioral2/files/0x000100000001ab29-121.dat	vmprotect
behavioral2/files/0x000100000001ab29-122.dat	vmprotect
behavioral2/memory/4056-123-0x00000000008B0000-0x00000000008B1000-memory.dmp	vmprotect
behavioral2/files/0x000100000001ab29-140.dat	vmprotect
behavioral2/files/0x000300000001ab35-158.dat	vmprotect
behavioral2/files/0x000300000001ab35-159.dat	vmprotect

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
T1081

Drops file in System32 directory 5 IoCs

description	ioc	Process
File created	C:\Windows\System32\odbcint\fontdrvhost.exe	intoSessionbrokermonitordhcpWinRefnet.exe
File created	C:\Windows\System32\odbcint\5b884080fd4f94e2695da25c503f9e33b9605b83	intoSessionbrokermonitordhcpWinRefnet.exe
File created	C:\Windows\System32\tzsyncres\winlogon.exe	intoSessionbrokermonitordhcpWinRefnet.exe
File opened for modification	C:\Windows\System32\tzsyncres\winlogon.exe	intoSessionbrokermonitordhcpWinRefnet.exe
File created	C:\Windows\System32\tzsyncres\cc11b995f2a76da408ea6a601e682e64743153ad	intoSessionbrokermonitordhcpWinRefnet.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Windows Defender\en-US\spoolsv.exe	intoSessionbrokermonitordhcpWinRefnet.exe
File opened for modification	C:\Program Files (x86)\Windows Defender\en-US\spoolsv.exe	intoSessionbrokermonitordhcpWinRefnet.exe
File created	C:\Program Files (x86)\Windows Defender\en-US\f3b6ecef712a24f33798f5d2fb3790c3d9b894c4	intoSessionbrokermonitordhcpWinRefnet.exe

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 6 IoCs

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

persistence

Scheduled Task

T1053

pid	Process
2336	schtasks.exe
4016	schtasks.exe
2644	schtasks.exe
3556	schtasks.exe
696	schtasks.exe
3920	schtasks.exe

Modifies registry class 3 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000_Classes\Local Settings	05AB720BBE85744CF1CBDAB2AA91BCFF.exe
Key created	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000_Classes\Local Settings	intoSessionbrokermonitordhcpWinRefnet.exe
Key created	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000_Classes\Local Settings	intoSessionbrokermonitordhcpWinRefnet.exe

Runs ping.exe 1 TTPs 2 IoCs

Remote System Discovery

T1018

pid	Process
2612	PING.EXE
800	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4056	intoSessionbrokermonitordhcpWinRefnet.exe
2200	intoSessionbrokermonitordhcpWinRefnet.exe
2120	winlogon.exe
2120	winlogon.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2120	winlogon.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4056	intoSessionbrokermonitordhcpWinRefnet.exe
Token: SeDebugPrivilege	2200	intoSessionbrokermonitordhcpWinRefnet.exe
Token: SeDebugPrivilege	2120	winlogon.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 996 wrote to memory of 3620	996	05AB720BBE85744CF1CBDAB2AA91BCFF.exe	75
PID 996 wrote to memory of 3620	996	05AB720BBE85744CF1CBDAB2AA91BCFF.exe	75
PID 996 wrote to memory of 3620	996	05AB720BBE85744CF1CBDAB2AA91BCFF.exe	75
PID 3620 wrote to memory of 3176	3620	WScript.exe	78
PID 3620 wrote to memory of 3176	3620	WScript.exe	78
PID 3620 wrote to memory of 3176	3620	WScript.exe	78
PID 3176 wrote to memory of 4056	3176	cmd.exe	80
PID 3176 wrote to memory of 4056	3176	cmd.exe	80
PID 4056 wrote to memory of 4016	4056	intoSessionbrokermonitordhcpWinRefnet.exe	82
PID 4056 wrote to memory of 4016	4056	intoSessionbrokermonitordhcpWinRefnet.exe	82
PID 4056 wrote to memory of 2644	4056	intoSessionbrokermonitordhcpWinRefnet.exe	84
PID 4056 wrote to memory of 2644	4056	intoSessionbrokermonitordhcpWinRefnet.exe	84
PID 4056 wrote to memory of 3556	4056	intoSessionbrokermonitordhcpWinRefnet.exe	86
PID 4056 wrote to memory of 3556	4056	intoSessionbrokermonitordhcpWinRefnet.exe	86
PID 4056 wrote to memory of 648	4056	intoSessionbrokermonitordhcpWinRefnet.exe	88
PID 4056 wrote to memory of 648	4056	intoSessionbrokermonitordhcpWinRefnet.exe	88
PID 648 wrote to memory of 2348	648	cmd.exe	90
PID 648 wrote to memory of 2348	648	cmd.exe	90
PID 648 wrote to memory of 2612	648	cmd.exe	91
PID 648 wrote to memory of 2612	648	cmd.exe	91
PID 648 wrote to memory of 2200	648	cmd.exe	92
PID 648 wrote to memory of 2200	648	cmd.exe	92
PID 2200 wrote to memory of 696	2200	intoSessionbrokermonitordhcpWinRefnet.exe	93
PID 2200 wrote to memory of 696	2200	intoSessionbrokermonitordhcpWinRefnet.exe	93
PID 2200 wrote to memory of 3920	2200	intoSessionbrokermonitordhcpWinRefnet.exe	95
PID 2200 wrote to memory of 3920	2200	intoSessionbrokermonitordhcpWinRefnet.exe	95
PID 2200 wrote to memory of 2336	2200	intoSessionbrokermonitordhcpWinRefnet.exe	97
PID 2200 wrote to memory of 2336	2200	intoSessionbrokermonitordhcpWinRefnet.exe	97
PID 2200 wrote to memory of 2544	2200	intoSessionbrokermonitordhcpWinRefnet.exe	99
PID 2200 wrote to memory of 2544	2200	intoSessionbrokermonitordhcpWinRefnet.exe	99
PID 2544 wrote to memory of 2548	2544	cmd.exe	101
PID 2544 wrote to memory of 2548	2544	cmd.exe	101
PID 2544 wrote to memory of 800	2544	cmd.exe	102
PID 2544 wrote to memory of 800	2544	cmd.exe	102
PID 2544 wrote to memory of 2120	2544	cmd.exe	103
PID 2544 wrote to memory of 2120	2544	cmd.exe	103

C:\Users\Admin\AppData\Local\Temp\05AB720BBE85744CF1CBDAB2AA91BCFF.exe
"C:\Users\Admin\AppData\Local\Temp\05AB720BBE85744CF1CBDAB2AA91BCFF.exe"
1⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:996
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\intoSessionbrokermonitordhcp\W9fT01B.vbe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3620
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\intoSessionbrokermonitordhcp\7uOfG5dY.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3176
  - - C:\intoSessionbrokermonitordhcp\intoSessionbrokermonitordhcpWinRefnet.exe
      "C:\intoSessionbrokermonitordhcp\intoSessionbrokermonitordhcpWinRefnet.exe"
      4⤵
      Executes dropped EXE
      Drops file in System32 directory
      Drops file in Program Files directory
      Modifies registry class
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:4056
    - - C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Defender\en-US\spoolsv.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:4016
    - - C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "SearchUI" /sc ONLOGON /tr "'C:\PerfLogs\SearchUI.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:2644
    - - C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Windows\System32\odbcint\fontdrvhost.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:3556
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\1lTmbAWjYz.bat"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:648
      - C:\Windows\system32\chcp.com
        
        chcp 65001
        6⤵
        
        PID:2348
      - C:\Windows\system32\PING.EXE
        
        ping -n 5 localhost
        6⤵
        Runs ping.exe
        
        PID:2612
      - C:\intoSessionbrokermonitordhcp\intoSessionbrokermonitordhcpWinRefnet.exe
        
        "C:\intoSessionbrokermonitordhcp\intoSessionbrokermonitordhcpWinRefnet.exe"
        6⤵
        Executes dropped EXE
        Drops file in System32 directory
        Modifies registry class
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:2200
        
        C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "winlogon" /sc ONLOGON /tr "'C:\Windows\System32\tzsyncres\winlogon.exe'" /rl HIGHEST /f
        7⤵
        Creates scheduled task(s)
        
        PID:696
        
        C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "System" /sc ONLOGON /tr "'C:\PerfLogs\System.exe'" /rl HIGHEST /f
        7⤵
        Creates scheduled task(s)
        
        PID:3920
        
        C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\ProgramData\Package Cache\{12578975-C765-4BDF-8DDC-3284BC0E855F}v14.21.27702\packages\vcRuntimeAdditional_amd64\WmiPrvSE.exe'" /rl HIGHEST /f
        7⤵
        Creates scheduled task(s)
        
        PID:2336
        
        C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\hDvSVPutvH.bat"
        7⤵
        Suspicious use of WriteProcessMemory
        
        PID:2544
        
        C:\Windows\system32\chcp.com
        
        chcp 65001
        8⤵
        
        PID:2548
        
        C:\Windows\system32\PING.EXE
        
        ping -n 5 localhost
        8⤵
        Runs ping.exe
        
        PID:800
        
        C:\Windows\System32\tzsyncres\winlogon.exe
        
        "C:\Windows\System32\tzsyncres\winlogon.exe"
        8⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious behavior: GetForegroundWindowSpam
        Suspicious use of AdjustPrivilegeToken
        
        PID:2120

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

Credentials in Files

T1081

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2120-167-0x000000001C182000-0x000000001C184000-memory.dmp

Download

memory/2120-168-0x000000001C185000-0x000000001C186000-memory.dmp

Download

memory/2120-165-0x000000001C180000-0x000000001C182000-memory.dmp

Download

memory/2120-166-0x000000001C184000-0x000000001C185000-memory.dmp

Download

memory/2200-149-0x0000000000C42000-0x0000000000C44000-memory.dmp

Download

memory/2200-147-0x0000000000C40000-0x0000000000C42000-memory.dmp

Download

memory/2200-148-0x0000000000C44000-0x0000000000C45000-memory.dmp

Download

memory/4056-128-0x000000001B610000-0x000000001B612000-memory.dmp

Download

memory/4056-130-0x000000001B614000-0x000000001B615000-memory.dmp

Download

memory/4056-129-0x0000000000F40000-0x0000000000F41000-memory.dmp

Download

memory/4056-127-0x0000000002CA0000-0x0000000002CA1000-memory.dmp

Download

memory/4056-126-0x000000001B740000-0x000000001B741000-memory.dmp

Download

memory/4056-123-0x00000000008B0000-0x00000000008B1000-memory.dmp

Download

memory/4056-132-0x000000001B612000-0x000000001B614000-memory.dmp

Download