djvu | 1a43d29d52aa8625e8e781d63ff2835ad46801fb30c329d2538a22fc027caa70

General

Target

2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe
Size

815KB
MD5

efe32de4c5ecc8d1e6a3a19f8a34f61c
SHA1

f28dad37fce7f28ded97e28b89cdf28d4313e47d
SHA256

2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44
SHA512

770cd0524121df290a199b7f44d4fcc82801cae7fa7ec644a10e3f9713122b71af4372b87b59f6dc8852439c70a2d075df2a9bc25185fefe334218d2157b9c88
SSDEEP

12288:MViuhuDax9n+FUgaqzDdNV96tqwLxeNFs9osoEITVB9E5oHA6vXASn8ZxcEwBc:ZD8sjxdN/6AwLomoVEyVEGHn3Ux

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://acacaca.org/test1/get.php

Attributes

extension
.vvew
offline_id
rE5LpDv2ftYRXAo7bC18EpzfRMTHSGjgfyIMfZt1
payload_url
http://rgyui.top/dl/build2.exe

http://acacaca.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-QsoSRIeAK6 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: 0530Jhyjd

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 9 IoCs

resource	yara_rule
behavioral2/memory/2596-2-0x0000000002380000-0x000000000249B000-memory.dmp	family_djvu
behavioral2/memory/1440-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1440-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1440-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1440-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1440-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4104-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4104-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4104-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
Djvu family
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-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4944	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-1-5-21-3350944739-639801879-157714471-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\52d081da-2cdc-48af-a482-137c5e99c4e1\\2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe\" --AutoStart"	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.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
12	api.2ip.ua
13	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2596 set thread context of 1440	2596	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	83
PID 3784 set thread context of 4104	3784	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	89

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
412	4104	WerFault.exe	89

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	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1440	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe
1440	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2596 wrote to memory of 1440	2596	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	83
PID 2596 wrote to memory of 1440	2596	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	83
PID 2596 wrote to memory of 1440	2596	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	83
PID 2596 wrote to memory of 1440	2596	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	83
PID 2596 wrote to memory of 1440	2596	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	83
PID 2596 wrote to memory of 1440	2596	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	83
PID 2596 wrote to memory of 1440	2596	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	83
PID 2596 wrote to memory of 1440	2596	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	83
PID 2596 wrote to memory of 1440	2596	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	83
PID 2596 wrote to memory of 1440	2596	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	83
PID 1440 wrote to memory of 4944	1440	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	85
PID 1440 wrote to memory of 4944	1440	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	85
PID 1440 wrote to memory of 4944	1440	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	85
PID 1440 wrote to memory of 3784	1440	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	86
PID 1440 wrote to memory of 3784	1440	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	86
PID 1440 wrote to memory of 3784	1440	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	86
PID 3784 wrote to memory of 4104	3784	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	89
PID 3784 wrote to memory of 4104	3784	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	89
PID 3784 wrote to memory of 4104	3784	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	89
PID 3784 wrote to memory of 4104	3784	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	89
PID 3784 wrote to memory of 4104	3784	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	89
PID 3784 wrote to memory of 4104	3784	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	89
PID 3784 wrote to memory of 4104	3784	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	89
PID 3784 wrote to memory of 4104	3784	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	89
PID 3784 wrote to memory of 4104	3784	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	89
PID 3784 wrote to memory of 4104	3784	2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe	89

C:\Users\Admin\AppData\Local\Temp\2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe
"C:\Users\Admin\AppData\Local\Temp\2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2596
- C:\Users\Admin\AppData\Local\Temp\2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe
  "C:\Users\Admin\AppData\Local\Temp\2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.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:1440
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\52d081da-2cdc-48af-a482-137c5e99c4e1" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:4944
- - C:\Users\Admin\AppData\Local\Temp\2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe
    "C:\Users\Admin\AppData\Local\Temp\2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3784
  - - C:\Users\Admin\AppData\Local\Temp\2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe
      "C:\Users\Admin\AppData\Local\Temp\2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      PID:4104
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 4104 -s 572
        5⤵
        Program crash
        
        PID:412

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 4104 -ip 4104
1⤵
PID:388

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

File and Directory Permissions Modification

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\52d081da-2cdc-48af-a482-137c5e99c4e1\2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44.exe

Filesize
815KB

MD5
efe32de4c5ecc8d1e6a3a19f8a34f61c

SHA1
f28dad37fce7f28ded97e28b89cdf28d4313e47d

SHA256
2e81b603cd8b8fd733319bfdbf341920bd678d4b84c474db80d5f69a7608ea44

SHA512
770cd0524121df290a199b7f44d4fcc82801cae7fa7ec644a10e3f9713122b71af4372b87b59f6dc8852439c70a2d075df2a9bc25185fefe334218d2157b9c88

Download Submit
memory/1440-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1440-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1440-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1440-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1440-19-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2596-1-0x0000000002260000-0x00000000022F3000-memory.dmp

Filesize
588KB

Download
memory/2596-2-0x0000000002380000-0x000000000249B000-memory.dmp

Filesize
1.1MB

Download
memory/3784-21-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download
memory/3784-24-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download
memory/4104-25-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4104-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4104-23-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads