djvu | f7561de520f21434830d40d74904e93125b76407d477411622bbd829283ba8c4

Analysis

max time kernel
138s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
12/08/2024, 16:48

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General

Target
8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe
Size 758KB
Sample240812-va915athnc
SHA256 f7561de520f21434830d40d74904e93125b76407d477411622bbd829283ba8c4
MD5 8f81e96f8c96dec003b51826bbd5885f
SHA1 7b8c4ec9a3808eaa32ab07d1608ad275f34adbe3
SHA512 8770f01b013e401a3eef992aa53e7623a0367bf857309fa238781f70f44ef3e1e5697751d2a28b7ff1f35e8fad921b3fbfeb17f3c9724fab786934c8eb8ee8ce
SSDEEP 12288:VI/X+roiofZzZXvGasEKcXm/WThCFrUi/bwV5LYBYH7caEArXMViC53j:gOsiorGLEKT/WThUlbaUYH7lE005
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://securebiz.org/fhsgtsspen6/get.php

Attributes

extension
.rigd
offline_id
gigF2ELYocnMQz77LhEpSoXvtYp2junk9HZFtJt1
payload_url
http://znpst.top/dl/build2.exe

http://securebiz.org/files/1/build3.exe
ransomnote
ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. You can get and look video overview decrypt tool: https://we.tl/t-2zbBkO06mv Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0335gSd743d

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 9 IoCs

resource	yara_rule
behavioral2/memory/32-2-0x0000000000CA0000-0x0000000000DBB000-memory.dmp	family_djvu
behavioral2/memory/4788-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4788-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4788-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4788-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4788-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/780-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/780-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/780-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation	8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4620	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\e7b1467e-5c87-40ae-9887-991cfb4fd176\\8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe\" --AutoStart"	8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe

Looks up external IP address via web service 2 IoCs

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

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

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 32 set thread context of 4788	32	8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe	87
PID 2728 set thread context of 780	2728	8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe	91

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1940	780	WerFault.exe	91

System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4788	8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe
4788	8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 32 wrote to memory of 4788	32	8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe	87
PID 32 wrote to memory of 4788	32	8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe	87
PID 32 wrote to memory of 4788	32	8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe	87
PID 32 wrote to memory of 4788	32	8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe	87
PID 32 wrote to memory of 4788	32	8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe	87
PID 32 wrote to memory of 4788	32	8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe	87
PID 32 wrote to memory of 4788	32	8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe	87
PID 32 wrote to memory of 4788	32	8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe	87
PID 32 wrote to memory of 4788	32	8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe	87
PID 32 wrote to memory of 4788	32	8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe	87
PID 4788 wrote to memory of 4620	4788	8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe	88
PID 4788 wrote to memory of 4620	4788	8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe	88
PID 4788 wrote to memory of 4620	4788	8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe	88
PID 4788 wrote to memory of 2728	4788	8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe	89
PID 4788 wrote to memory of 2728	4788	8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe	89
PID 4788 wrote to memory of 2728	4788	8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe	89
PID 2728 wrote to memory of 780	2728	8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe	91
PID 2728 wrote to memory of 780	2728	8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe	91
PID 2728 wrote to memory of 780	2728	8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe	91
PID 2728 wrote to memory of 780	2728	8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe	91
PID 2728 wrote to memory of 780	2728	8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe	91
PID 2728 wrote to memory of 780	2728	8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe	91
PID 2728 wrote to memory of 780	2728	8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe	91
PID 2728 wrote to memory of 780	2728	8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe	91
PID 2728 wrote to memory of 780	2728	8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe	91
PID 2728 wrote to memory of 780	2728	8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe	91

C:\Users\Admin\AppData\Local\Temp\8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:32
- C:\Users\Admin\AppData\Local\Temp\8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4788
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\e7b1467e-5c87-40ae-9887-991cfb4fd176" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:4620
- - C:\Users\Admin\AppData\Local\Temp\8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2728
  - - C:\Users\Admin\AppData\Local\Temp\8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe
      "C:\Users\Admin\AppData\Local\Temp\8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      PID:780
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 780 -s 568
        5⤵
        Program crash
        
        PID:1940

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 780 -ip 780
1⤵
PID:4972

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

File and Directory Permissions Modification

T1222

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe

Path C:\Users\Admin\AppData\Local\e7b1467e-5c87-40ae-9887-991cfb4fd176\8f81e96f8c96dec003b51826bbd5885f_JaffaCakes118.exe
Size 758KB
SHA256 f7561de520f21434830d40d74904e93125b76407d477411622bbd829283ba8c4
MD5 8f81e96f8c96dec003b51826bbd5885f
SHA1 7b8c4ec9a3808eaa32ab07d1608ad275f34adbe3
SHA512 8770f01b013e401a3eef992aa53e7623a0367bf857309fa238781f70f44ef3e1e5697751d2a28b7ff1f35e8fad921b3fbfeb17f3c9724fab786934c8eb8ee8ce
SSDEEP 12288:VI/X+roiofZzZXvGasEKcXm/WThCFrUi/bwV5LYBYH7caEArXMViC53j:gOsiorGLEKT/WThUlbaUYH7lE005
MD5 SHA1 SHA512 SSDEEP

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memory/32-2-0x0000000000CA0000-0x0000000000DBB000-memory.dmp

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memory/32-1-0x0000000000BC0000-0x0000000000C61000-memory.dmp

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memory/780-26-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/780-24-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/780-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2728-27-0x0000000000400000-0x00000000008ED000-memory.dmp

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memory/2728-23-0x0000000000400000-0x00000000008ED000-memory.dmp

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memory/4788-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4788-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4788-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4788-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4788-4-0x0000000000400000-0x0000000000537000-memory.dmp

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