f6a307d243c407c27489de37adac83e9205be531cbb4e2cb71545627faf813fd

Resubmissions

11-01-2021 13:09

210111-dlhjyngw66 8

11-01-2021 07:36

210111-xfhgmxjy6n 10

Analysis

max time kernel
241s
max time network
240s
platform
windows7_x64
resource
win7v20201028
submitted
11-01-2021 13:09

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General

Target

4ced2056e4efe1c93b9f4adaaeaba20c.exe
Size

607KB
MD5

4ced2056e4efe1c93b9f4adaaeaba20c
SHA1

b975777c42d7d8fb04c34a2efc64dc5e4c574712
SHA256

f6a307d243c407c27489de37adac83e9205be531cbb4e2cb71545627faf813fd
SHA512

014df0ad54bf23335f964fa4e313a91b60b3ea2c62b73a306e973177830b573666aaebc1932cafa766042f34b8e32adcfabe3027aae2cc09341fd138a8963eaf

Score

8^/10

evasion

Malware Config

Signatures

Disables Task Manager via registry modification
evasion

Executes dropped EXE 3 IoCs

pid	Process
1768	HoykwG9pmLZ7sZbSP8eb.exe
952	winrar-x84.exe
1224	WmiPrvSE.exe

Loads dropped DLL 2 IoCs

pid	Process
1988	cmd.exe
692	cmd.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files\MSBuild\Microsoft\Windows Workflow Foundation\v3.0\WmiPrvSE.exe	winrar-x84.exe
File created	C:\Program Files\MSBuild\Microsoft\Windows Workflow Foundation\v3.0\24dbde2999530ef5fd907494bc374d663924116c	winrar-x84.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Downloaded Program Files\taskhost.exe	winrar-x84.exe
File created	C:\Windows\Downloaded Program Files\b75386f1303e64d8139363b71e44ac16341adf4e	winrar-x84.exe

Creates scheduled task(s) 1 TTPs 7 IoCs

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

persistence

Scheduled Task

T1053

pid	Process
1140	schtasks.exe
1996	schtasks.exe
1236	schtasks.exe
1712	schtasks.exe
308	schtasks.exe
1616	schtasks.exe
1228	schtasks.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
1524	reg.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
952	winrar-x84.exe
1224	WmiPrvSE.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	952	winrar-x84.exe
Token: SeDebugPrivilege	1224	WmiPrvSE.exe

Suspicious use of WriteProcessMemory 52 IoCs

description	pid	Process	procid_target
PID 1660 wrote to memory of 1248	1660	4ced2056e4efe1c93b9f4adaaeaba20c.exe	26
PID 1660 wrote to memory of 1248	1660	4ced2056e4efe1c93b9f4adaaeaba20c.exe	26
PID 1660 wrote to memory of 1248	1660	4ced2056e4efe1c93b9f4adaaeaba20c.exe	26
PID 1660 wrote to memory of 1248	1660	4ced2056e4efe1c93b9f4adaaeaba20c.exe	26
PID 1248 wrote to memory of 1988	1248	WScript.exe	27
PID 1248 wrote to memory of 1988	1248	WScript.exe	27
PID 1248 wrote to memory of 1988	1248	WScript.exe	27
PID 1248 wrote to memory of 1988	1248	WScript.exe	27
PID 1988 wrote to memory of 1768	1988	cmd.exe	29
PID 1988 wrote to memory of 1768	1988	cmd.exe	29
PID 1988 wrote to memory of 1768	1988	cmd.exe	29
PID 1988 wrote to memory of 1768	1988	cmd.exe	29
PID 1768 wrote to memory of 1524	1768	HoykwG9pmLZ7sZbSP8eb.exe	31
PID 1768 wrote to memory of 1524	1768	HoykwG9pmLZ7sZbSP8eb.exe	31
PID 1768 wrote to memory of 1524	1768	HoykwG9pmLZ7sZbSP8eb.exe	31
PID 1768 wrote to memory of 1524	1768	HoykwG9pmLZ7sZbSP8eb.exe	31
PID 1524 wrote to memory of 692	1524	WScript.exe	35
PID 1524 wrote to memory of 692	1524	WScript.exe	35
PID 1524 wrote to memory of 692	1524	WScript.exe	35
PID 1524 wrote to memory of 692	1524	WScript.exe	35
PID 692 wrote to memory of 952	692	cmd.exe	36
PID 692 wrote to memory of 952	692	cmd.exe	36
PID 692 wrote to memory of 952	692	cmd.exe	36
PID 692 wrote to memory of 952	692	cmd.exe	36
PID 952 wrote to memory of 308	952	winrar-x84.exe	38
PID 952 wrote to memory of 308	952	winrar-x84.exe	38
PID 952 wrote to memory of 308	952	winrar-x84.exe	38
PID 952 wrote to memory of 1616	952	winrar-x84.exe	40
PID 952 wrote to memory of 1616	952	winrar-x84.exe	40
PID 952 wrote to memory of 1616	952	winrar-x84.exe	40
PID 952 wrote to memory of 1228	952	winrar-x84.exe	42
PID 952 wrote to memory of 1228	952	winrar-x84.exe	42
PID 952 wrote to memory of 1228	952	winrar-x84.exe	42
PID 952 wrote to memory of 1140	952	winrar-x84.exe	44
PID 952 wrote to memory of 1140	952	winrar-x84.exe	44
PID 952 wrote to memory of 1140	952	winrar-x84.exe	44
PID 952 wrote to memory of 1996	952	winrar-x84.exe	46
PID 952 wrote to memory of 1996	952	winrar-x84.exe	46
PID 952 wrote to memory of 1996	952	winrar-x84.exe	46
PID 952 wrote to memory of 1236	952	winrar-x84.exe	48
PID 952 wrote to memory of 1236	952	winrar-x84.exe	48
PID 952 wrote to memory of 1236	952	winrar-x84.exe	48
PID 952 wrote to memory of 1712	952	winrar-x84.exe	50
PID 952 wrote to memory of 1712	952	winrar-x84.exe	50
PID 952 wrote to memory of 1712	952	winrar-x84.exe	50
PID 952 wrote to memory of 1224	952	winrar-x84.exe	52
PID 952 wrote to memory of 1224	952	winrar-x84.exe	52
PID 952 wrote to memory of 1224	952	winrar-x84.exe	52
PID 692 wrote to memory of 1524	692	cmd.exe	53
PID 692 wrote to memory of 1524	692	cmd.exe	53
PID 692 wrote to memory of 1524	692	cmd.exe	53
PID 692 wrote to memory of 1524	692	cmd.exe	53

C:\Users\Admin\AppData\Local\Temp\4ced2056e4efe1c93b9f4adaaeaba20c.exe
"C:\Users\Admin\AppData\Local\Temp\4ced2056e4efe1c93b9f4adaaeaba20c.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1660
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\WinRAR\wSmIzsMZSTGIPjXygtTeiEZYkIjJjD.vbe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1248
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Roaming\WinRAR\wAcLjfo4uMcnTa1rAjnz0eLcoo04D9.bat" "
    3⤵
    - Loads dropped DLL
    - Suspicious use of WriteProcessMemory
    PID:1988
  - - C:\Users\Admin\AppData\Roaming\WinRAR\HoykwG9pmLZ7sZbSP8eb.exe
      HoykwG9pmLZ7sZbSP8eb.exe -p2e840a597483ac4423c7c5ec1a09b39042cbf75d
      4⤵
      Executes dropped EXE
      Suspicious use of WriteProcessMemory
      PID:1768
    - - C:\Windows\SysWOW64\WScript.exe
        
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\WinRAR\tPKG2uMJtmCS4Bv6TMepBvdoqxAPGa.vbe"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:1524
      - C:\Windows\SysWOW64\cmd.exe
        
        cmd /c ""C:\Users\Admin\AppData\Roaming\WinRAR\mQE440b4P9lIBPO3Qboqf8inqaQoJr.bat" "
        6⤵
        Loads dropped DLL
        Suspicious use of WriteProcessMemory
        
        PID:692
        
        C:\Users\Admin\AppData\Roaming\WinRAR\winrar-x84.exe
        
        "C:\Users\Admin\AppData\Roaming\WinRAR\winrar-x84.exe"
        7⤵
        Executes dropped EXE
        Drops file in Program Files directory
        Drops file in Windows directory
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:952
        
        C:\Windows\system32\schtasks.exe
        
        "schtasks" /create /tn "explorer" /sc ONLOGON /tr "'C:\Recovery\a7611f42-198c-11eb-8a49-ee401b9e63cb\explorer.exe'" /rl HIGHEST /f
        8⤵
        Creates scheduled task(s)
        
        PID:308
        
        C:\Windows\system32\schtasks.exe
        
        "schtasks" /create /tn "smss" /sc ONLOGON /tr "'C:\PerfLogs\Admin\smss.exe'" /rl HIGHEST /f
        8⤵
        Creates scheduled task(s)
        
        PID:1616
        
        C:\Windows\system32\schtasks.exe
        
        "schtasks" /create /tn "taskhost" /sc ONLOGON /tr "'C:\Windows\Downloaded Program Files\taskhost.exe'" /rl HIGHEST /f
        8⤵
        Creates scheduled task(s)
        
        PID:1228
        
        C:\Windows\system32\schtasks.exe
        
        "schtasks" /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Documents and Settings\spoolsv.exe'" /rl HIGHEST /f
        8⤵
        Creates scheduled task(s)
        
        PID:1140
        
        C:\Windows\system32\schtasks.exe
        
        "schtasks" /create /tn "winrar-x84" /sc ONLOGON /tr "'C:\ProgramData\Favorites\winrar-x84.exe'" /rl HIGHEST /f
        8⤵
        Creates scheduled task(s)
        
        PID:1996
        
        C:\Windows\system32\schtasks.exe
        
        "schtasks" /create /tn "winrar-x84" /sc ONLOGON /tr "'C:\Recovery\a7611f42-198c-11eb-8a49-ee401b9e63cb\winrar-x84.exe'" /rl HIGHEST /f
        8⤵
        Creates scheduled task(s)
        
        PID:1236
        
        C:\Windows\system32\schtasks.exe
        
        "schtasks" /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Program Files\MSBuild\Microsoft\Windows Workflow Foundation\v3.0\WmiPrvSE.exe'" /rl HIGHEST /f
        8⤵
        Creates scheduled task(s)
        
        PID:1712
        
        C:\Program Files\MSBuild\Microsoft\Windows Workflow Foundation\v3.0\WmiPrvSE.exe
        
        "C:\Program Files\MSBuild\Microsoft\Windows Workflow Foundation\v3.0\WmiPrvSE.exe"
        8⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1224
        
        C:\Windows\SysWOW64\reg.exe
        
        reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f
        7⤵
        Modifies registry key
        
        PID:1524

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/952-20-0x000007FEF4D10000-0x000007FEF56FC000-memory.dmp

Filesize
9.9MB

Download
memory/952-21-0x00000000000A0000-0x00000000000A1000-memory.dmp

Filesize
4KB

Download
memory/1224-34-0x0000000000D40000-0x0000000000D41000-memory.dmp

Filesize
4KB

Download
memory/1224-33-0x000007FEF4D10000-0x000007FEF56FC000-memory.dmp

Filesize
9.9MB

Download
memory/1248-6-0x0000000002790000-0x0000000002794000-memory.dmp

Filesize
16KB

Download
memory/1524-15-0x0000000002630000-0x0000000002634000-memory.dmp

Filesize
16KB

Download