djvu | e833b7fc4bf14527edb120ee4e691a660b21f93b1ec22bf15881bdcee4c5bb8d

Analysis

max time kernel
69s
max time network
132s
platform
windows10_x64
resource
win10v20210408
submitted
03/05/2021, 01:16

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General

Target
e833b7fc4bf14527edb120ee4e691a660b21f93b1ec22bf15881bdcee4c5bb8d.exe
Size 749KB
Sample210503-spszd9aats
SHA256 e833b7fc4bf14527edb120ee4e691a660b21f93b1ec22bf15881bdcee4c5bb8d
MD5 22bee07f12f16ba1baa242c5aea482a7
SHA1 b32a197fcd7cf7872e7d6fad1ebef7c4a0069be4
SHA512 76136ef578eb80fe3ed2984b809209dd1128f93dc77f31d84f37678580e0c2b714d0511c5e68b01d86795f027c947719de0107a96a802cb2ce589aa05e9a7b91
MD5 SHA1 SHA512

Score

10^/10

djvu vidar discovery evasion persistence ransomware spyware stealer

Malware Config

Signatures

Deletes Windows Defender Definitions 2 TTPs 1 IoCs

Uses mpcmdrun utility to delete all AV definitions.

evasion

Impair Defenses

T1562

Command-Line Interface

T1059

pid	Process
3852	mpcmdrun.exe

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar
Disables Task Manager via registry modification
evasion
Downloads MZ/PE file

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	updatewin2.exe

Executes dropped EXE 4 IoCs

pid	Process
3852	updatewin1.exe
1320	updatewin2.exe
1344	5.exe
3988	updatewin1.exe

Loads dropped DLL 2 IoCs

pid	Process
1344	5.exe
1344	5.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2848	icacls.exe

Reads local data of messenger clients 2 TTPs
Infostealers often target stored data of messaging applications, which can include saved credentials and account information.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
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
Accesses 2FA software files, possible credential harvesting 2 TTPs
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\a43f54b8-d371-4031-8855-f277a9cc4e03\\e833b7fc4bf14527edb120ee4e691a660b21f93b1ec22bf15881bdcee4c5bb8d.exe\" --AutoStart"	e833b7fc4bf14527edb120ee4e691a660b21f93b1ec22bf15881bdcee4c5bb8d.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Looks up external IP address via web service 3 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
11	api.2ip.ua
19	api.2ip.ua
10	api.2ip.ua

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

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	5.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	5.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
660	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
196	taskkill.exe

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349	e833b7fc4bf14527edb120ee4e691a660b21f93b1ec22bf15881bdcee4c5bb8d.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 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	e833b7fc4bf14527edb120ee4e691a660b21f93b1ec22bf15881bdcee4c5bb8d.exe

Suspicious behavior: EnumeratesProcesses 22 IoCs

pid	Process
572	e833b7fc4bf14527edb120ee4e691a660b21f93b1ec22bf15881bdcee4c5bb8d.exe
572	e833b7fc4bf14527edb120ee4e691a660b21f93b1ec22bf15881bdcee4c5bb8d.exe
188	e833b7fc4bf14527edb120ee4e691a660b21f93b1ec22bf15881bdcee4c5bb8d.exe
188	e833b7fc4bf14527edb120ee4e691a660b21f93b1ec22bf15881bdcee4c5bb8d.exe
1344	5.exe
1344	5.exe
1344	5.exe
1344	5.exe
1344	5.exe
1344	5.exe
1344	5.exe
1344	5.exe
2196	powershell.exe
2196	powershell.exe
2196	powershell.exe
2196	powershell.exe
1976	powershell.exe
1976	powershell.exe
1976	powershell.exe
792	powershell.exe
792	powershell.exe
792	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	196	taskkill.exe
Token: SeDebugPrivilege	2196	powershell.exe
Token: SeDebugPrivilege	1976	powershell.exe
Token: SeDebugPrivilege	792	powershell.exe

Suspicious use of WriteProcessMemory 41 IoCs

description	pid	Process	procid_target
PID 572 wrote to memory of 2848	572	e833b7fc4bf14527edb120ee4e691a660b21f93b1ec22bf15881bdcee4c5bb8d.exe	75
PID 572 wrote to memory of 2848	572	e833b7fc4bf14527edb120ee4e691a660b21f93b1ec22bf15881bdcee4c5bb8d.exe	75
PID 572 wrote to memory of 2848	572	e833b7fc4bf14527edb120ee4e691a660b21f93b1ec22bf15881bdcee4c5bb8d.exe	75
PID 572 wrote to memory of 188	572	e833b7fc4bf14527edb120ee4e691a660b21f93b1ec22bf15881bdcee4c5bb8d.exe	76
PID 572 wrote to memory of 188	572	e833b7fc4bf14527edb120ee4e691a660b21f93b1ec22bf15881bdcee4c5bb8d.exe	76
PID 572 wrote to memory of 188	572	e833b7fc4bf14527edb120ee4e691a660b21f93b1ec22bf15881bdcee4c5bb8d.exe	76
PID 188 wrote to memory of 3852	188	e833b7fc4bf14527edb120ee4e691a660b21f93b1ec22bf15881bdcee4c5bb8d.exe	80
PID 188 wrote to memory of 3852	188	e833b7fc4bf14527edb120ee4e691a660b21f93b1ec22bf15881bdcee4c5bb8d.exe	80
PID 188 wrote to memory of 3852	188	e833b7fc4bf14527edb120ee4e691a660b21f93b1ec22bf15881bdcee4c5bb8d.exe	80
PID 188 wrote to memory of 1320	188	e833b7fc4bf14527edb120ee4e691a660b21f93b1ec22bf15881bdcee4c5bb8d.exe	81
PID 188 wrote to memory of 1320	188	e833b7fc4bf14527edb120ee4e691a660b21f93b1ec22bf15881bdcee4c5bb8d.exe	81
PID 188 wrote to memory of 1320	188	e833b7fc4bf14527edb120ee4e691a660b21f93b1ec22bf15881bdcee4c5bb8d.exe	81
PID 188 wrote to memory of 1344	188	e833b7fc4bf14527edb120ee4e691a660b21f93b1ec22bf15881bdcee4c5bb8d.exe	82
PID 188 wrote to memory of 1344	188	e833b7fc4bf14527edb120ee4e691a660b21f93b1ec22bf15881bdcee4c5bb8d.exe	82
PID 188 wrote to memory of 1344	188	e833b7fc4bf14527edb120ee4e691a660b21f93b1ec22bf15881bdcee4c5bb8d.exe	82
PID 1344 wrote to memory of 3104	1344	5.exe	84
PID 1344 wrote to memory of 3104	1344	5.exe	84
PID 1344 wrote to memory of 3104	1344	5.exe	84
PID 3104 wrote to memory of 196	3104	cmd.exe	86
PID 3104 wrote to memory of 196	3104	cmd.exe	86
PID 3104 wrote to memory of 196	3104	cmd.exe	86
PID 3104 wrote to memory of 660	3104	cmd.exe	87
PID 3104 wrote to memory of 660	3104	cmd.exe	87
PID 3104 wrote to memory of 660	3104	cmd.exe	87
PID 3852 wrote to memory of 3988	3852	updatewin1.exe	88
PID 3852 wrote to memory of 3988	3852	updatewin1.exe	88
PID 3852 wrote to memory of 3988	3852	updatewin1.exe	88
PID 3988 wrote to memory of 2196	3988	updatewin1.exe	89
PID 3988 wrote to memory of 2196	3988	updatewin1.exe	89
PID 3988 wrote to memory of 2196	3988	updatewin1.exe	89
PID 3988 wrote to memory of 1976	3988	updatewin1.exe	91
PID 3988 wrote to memory of 1976	3988	updatewin1.exe	91
PID 3988 wrote to memory of 1976	3988	updatewin1.exe	91
PID 1976 wrote to memory of 792	1976	powershell.exe	93
PID 1976 wrote to memory of 792	1976	powershell.exe	93
PID 1976 wrote to memory of 792	1976	powershell.exe	93
PID 3988 wrote to memory of 3852	3988	updatewin1.exe	95
PID 3988 wrote to memory of 3852	3988	updatewin1.exe	95
PID 3988 wrote to memory of 2456	3988	updatewin1.exe	97
PID 3988 wrote to memory of 2456	3988	updatewin1.exe	97
PID 3988 wrote to memory of 2456	3988	updatewin1.exe	97

C:\Users\Admin\AppData\Local\Temp\e833b7fc4bf14527edb120ee4e691a660b21f93b1ec22bf15881bdcee4c5bb8d.exe
"C:\Users\Admin\AppData\Local\Temp\e833b7fc4bf14527edb120ee4e691a660b21f93b1ec22bf15881bdcee4c5bb8d.exe"
1⤵
- Adds Run key to start application
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:572
- C:\Windows\SysWOW64\icacls.exe
  icacls "C:\Users\Admin\AppData\Local\a43f54b8-d371-4031-8855-f277a9cc4e03" /deny *S-1-1-0:(OI)(CI)(DE,DC)
  2⤵
  - Modifies file permissions
  PID:2848
- C:\Users\Admin\AppData\Local\Temp\e833b7fc4bf14527edb120ee4e691a660b21f93b1ec22bf15881bdcee4c5bb8d.exe
  "C:\Users\Admin\AppData\Local\Temp\e833b7fc4bf14527edb120ee4e691a660b21f93b1ec22bf15881bdcee4c5bb8d.exe" --Admin IsNotAutoStart IsNotTask
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:188
- - C:\Users\Admin\AppData\Local\b4be6c93-5ac3-4359-9ea1-a7de691149d2\updatewin1.exe
    "C:\Users\Admin\AppData\Local\b4be6c93-5ac3-4359-9ea1-a7de691149d2\updatewin1.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of WriteProcessMemory
    PID:3852
  - - C:\Users\Admin\AppData\Local\b4be6c93-5ac3-4359-9ea1-a7de691149d2\updatewin1.exe
      "C:\Users\Admin\AppData\Local\b4be6c93-5ac3-4359-9ea1-a7de691149d2\updatewin1.exe" --Admin
      4⤵
      Executes dropped EXE
      Suspicious use of WriteProcessMemory
      PID:3988
    - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        powershell -Command Set-ExecutionPolicy -Scope CurrentUser RemoteSigned
        5⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2196
    - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        powershell -NoProfile -ExecutionPolicy Bypass -Command "& {Start-Process PowerShell -ArgumentList '-NoProfile -ExecutionPolicy Bypass -File ""C:\Users\Admin\AppData\Local\script.ps1""' -Verb RunAs}"
        5⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:1976
      - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -NoProfile -ExecutionPolicy Bypass -File "C:\Users\Admin\AppData\Local\script.ps1
        6⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:792
    - - C:\Program Files\Windows Defender\mpcmdrun.exe
        
        "C:\Program Files\Windows Defender\mpcmdrun.exe" -removedefinitions -all
        5⤵
        Deletes Windows Defender Definitions
        
        PID:3852
    - - C:\Windows\SysWOW64\cmd.exe
        
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\delself.bat""
        5⤵
        
        PID:2456
- - C:\Users\Admin\AppData\Local\b4be6c93-5ac3-4359-9ea1-a7de691149d2\updatewin2.exe
    "C:\Users\Admin\AppData\Local\b4be6c93-5ac3-4359-9ea1-a7de691149d2\updatewin2.exe"
    3⤵
    - Drops file in Drivers directory
    - Executes dropped EXE
    PID:1320
- - C:\Users\Admin\AppData\Local\b4be6c93-5ac3-4359-9ea1-a7de691149d2\5.exe
    "C:\Users\Admin\AppData\Local\b4be6c93-5ac3-4359-9ea1-a7de691149d2\5.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Checks processor information in registry
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:1344
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im 5.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\b4be6c93-5ac3-4359-9ea1-a7de691149d2\5.exe" & del C:\ProgramData\*.dll & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3104
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im 5.exe /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:196
    - - C:\Windows\SysWOW64\timeout.exe
        
        timeout /t 6
        5⤵
        Delays execution with timeout.exe
        
        PID:660

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Command-Line Interface

T1059

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

File and Directory Permissions Modification

T1222

Impair Defenses

T1562

Install Root Certificate

T1130

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/188-124-0x0000000000400000-0x0000000002C2C000-memory.dmp

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memory/572-114-0x0000000004950000-0x0000000004A6A000-memory.dmp

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memory/572-115-0x0000000000400000-0x0000000002C2C000-memory.dmp

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memory/792-233-0x0000000004C40000-0x0000000004C41000-memory.dmp

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memory/792-236-0x000000007EBF0000-0x000000007EBF1000-memory.dmp

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memory/792-237-0x0000000004C43000-0x0000000004C44000-memory.dmp

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memory/792-234-0x0000000004C42000-0x0000000004C43000-memory.dmp

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memory/1320-142-0x0000000000400000-0x000000000044D000-memory.dmp

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memory/1344-135-0x0000000000400000-0x00000000004F9000-memory.dmp

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memory/1344-134-0x0000000002270000-0x0000000002307000-memory.dmp

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memory/1976-225-0x0000000007190000-0x0000000007191000-memory.dmp

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memory/1976-226-0x0000000007192000-0x0000000007193000-memory.dmp

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memory/1976-232-0x0000000007193000-0x0000000007194000-memory.dmp

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memory/2196-160-0x0000000007870000-0x0000000007871000-memory.dmp

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memory/2196-164-0x0000000008A10000-0x0000000008A11000-memory.dmp

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memory/2196-165-0x00000000088A0000-0x00000000088A1000-memory.dmp

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memory/2196-173-0x0000000009600000-0x0000000009633000-memory.dmp

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memory/2196-180-0x00000000095E0000-0x00000000095E1000-memory.dmp

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memory/2196-185-0x00000000099D0000-0x00000000099D1000-memory.dmp

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memory/2196-186-0x000000007E600000-0x000000007E601000-memory.dmp

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memory/2196-187-0x0000000009B20000-0x0000000009B21000-memory.dmp

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memory/2196-220-0x0000000005333000-0x0000000005334000-memory.dmp

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memory/2196-221-0x0000000005336000-0x0000000005338000-memory.dmp

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memory/2196-162-0x0000000008180000-0x0000000008181000-memory.dmp

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memory/2196-161-0x00000000080C0000-0x00000000080C1000-memory.dmp

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memory/2196-163-0x0000000007950000-0x0000000007951000-memory.dmp

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memory/2196-159-0x00000000077D0000-0x00000000077D1000-memory.dmp

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memory/2196-158-0x0000000005332000-0x0000000005333000-memory.dmp

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memory/2196-157-0x0000000005330000-0x0000000005331000-memory.dmp

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memory/2196-155-0x0000000005080000-0x0000000005081000-memory.dmp

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memory/2196-156-0x0000000007990000-0x0000000007991000-memory.dmp

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memory/3852-141-0x0000000000400000-0x000000000044D000-memory.dmp

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memory/3988-154-0x0000000000400000-0x000000000044D000-memory.dmp

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