djvu | 43df4500189c83808a119ee66ee8b77488619eed618316d937461e602cdc156d

General

Target

5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe
Size

710KB
MD5

f8ef98bbaff6ac82dacde20ee90bfa55
SHA1

65761535a352bfeece2a708eaf6a329fc544872e
SHA256

5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de
SHA512

21618fa54b094fa37deeed5ef7e2fba6da13e57dc36119a5fe502e855a81fa5c9530b45a8be1a0333c8aa0ee862eb07f5c4af1c622b79bbfa8b3e4a3285790dd
SSDEEP

12288:brr/q8UczPPvwkvhfloghhbUkxMEpLJ+GXJwvnvO2BfYV3yXL2QCd:bIqwkpf6gUAGO21O3yCQA

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://vjsi.top/nddddhsspen6/get.php

Attributes

extension
.nobu
offline_id
YEy9XNzIuKSJ9bVw38Nvhm3G1ggaNsF2HShNYFt1
payload_url
http://vjsi.top/files/penelop/updatewin1.exe

http://vjsi.top/files/penelop/updatewin2.exe

http://vjsi.top/files/penelop/updatewin.exe

http://vjsi.top/files/penelop/3.exe

http://vjsi.top/files/penelop/4.exe

http://vjsi.top/files/penelop/5.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-j3hj0RjttJ 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: 0269Orjk

rsa_pubkey.plain

Extracted

Path

F:\_readme.txt

Family

djvu

Ransom Note

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-j3hj0RjttJ 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: 0269OrjkYEy9XNzIuKSJ9bVw38Nvhm3G1ggaNsF2HShNYFt1

Emails

[email protected]

URLs

https://we.tl/t-j3hj0RjttJ

Signatures

Detected Djvu ransomware 12 IoCs

resource	yara_rule
behavioral2/memory/5464-2-0x0000000000B40000-0x0000000000C5A000-memory.dmp	family_djvu
behavioral2/memory/5464-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5464-16-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5464-15-0x0000000000B40000-0x0000000000C5A000-memory.dmp	family_djvu
behavioral2/memory/5464-14-0x0000000000400000-0x000000000055B000-memory.dmp	family_djvu
behavioral2/memory/3240-19-0x0000000000400000-0x000000000055B000-memory.dmp	family_djvu
behavioral2/memory/3240-26-0x0000000000400000-0x000000000055B000-memory.dmp	family_djvu
behavioral2/memory/3240-30-0x0000000000400000-0x000000000055B000-memory.dmp	family_djvu
behavioral2/memory/3240-31-0x0000000000400000-0x000000000055B000-memory.dmp	family_djvu
behavioral2/memory/1364-43-0x0000000000400000-0x000000000055B000-memory.dmp	family_djvu
behavioral2/memory/1364-45-0x0000000000400000-0x000000000055B000-memory.dmp	family_djvu
behavioral2/memory/3240-391-0x0000000000400000-0x000000000055B000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
Djvu family
djvu
Renames multiple (170) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware

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-1-5-21-814918696-1585701690-3140955116-1000\Control Panel\International\Geo\Nation	5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe

Executes dropped EXE 1 IoCs

pid	Process
1364	5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3248	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-1-5-21-814918696-1585701690-3140955116-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\c2f4fb08-47a1-4510-989e-f2e140e82ccf\\5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe\" --AutoStart"	5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe

Looks up external IP address via web service 4 IoCs

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

flow	ioc
81	api.2ip.ua
18	api.2ip.ua
19	api.2ip.ua
33	api.2ip.ua

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

System Information Discovery
T1082

Program crash 3 IoCs

pid	pid_target	Process	procid_target
2592	5464	WerFault.exe	85
4460	1364	WerFault.exe	112
516	3240	WerFault.exe	90

System Location Discovery: System Language Discovery 1 TTPs 4 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	5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
5464	5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe
5464	5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe
3240	5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe
3240	5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe
1364	5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe
1364	5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe
3240	5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe
3240	5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5464 wrote to memory of 3248	5464	5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe	89
PID 5464 wrote to memory of 3248	5464	5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe	89
PID 5464 wrote to memory of 3248	5464	5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe	89
PID 5464 wrote to memory of 3240	5464	5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe	90
PID 5464 wrote to memory of 3240	5464	5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe	90
PID 5464 wrote to memory of 3240	5464	5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe	90

C:\Users\Admin\AppData\Local\Temp\5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe
"C:\Users\Admin\AppData\Local\Temp\5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:5464
- C:\Windows\SysWOW64\icacls.exe
  icacls "C:\Users\Admin\AppData\Local\c2f4fb08-47a1-4510-989e-f2e140e82ccf" /deny *S-1-1-0:(OI)(CI)(DE,DC)
  2⤵
  - Modifies file permissions
  - System Location Discovery: System Language Discovery
  PID:3248
- C:\Users\Admin\AppData\Local\Temp\5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe
  "C:\Users\Admin\AppData\Local\Temp\5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe" --Admin IsNotAutoStart IsNotTask
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:3240
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3240 -s 1764
    3⤵
    - Program crash
    PID:516
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5464 -s 2128
  2⤵
  - Program crash
  PID:2592

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 5464 -ip 5464
1⤵
PID:4472

C:\Users\Admin\AppData\Local\c2f4fb08-47a1-4510-989e-f2e140e82ccf\5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe
C:\Users\Admin\AppData\Local\c2f4fb08-47a1-4510-989e-f2e140e82ccf\5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe --Task
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
PID:1364
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1364 -s 1204
  2⤵
  - Program crash
  PID:4460

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 544 -p 1364 -ip 1364
1⤵
PID:4492

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 3240 -ip 3240
1⤵
PID:3180

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\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12

Filesize
1KB

MD5
c9be626e9715952e9b70f92f912b9787

SHA1
aa2e946d9ad9027172d0d321917942b7562d6abe

SHA256
c13e8d22800c200915f87f71c31185053e4e60ca25de2e41e160e09cd2d815d4

SHA512
7581b7c593785380e9db3ae760af85c1a889f607a3cd2aa5a2695a0e5a0fe8ee751578e88f7d8c997faeda804e2fc2655d859bee2832eace526ed4379edaa3f5

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8

Filesize
436B

MD5
971c514f84bba0785f80aa1c23edfd79

SHA1
732acea710a87530c6b08ecdf32a110d254a54c8

SHA256
f157ed17fcaf8837fa82f8b69973848c9b10a02636848f995698212a08f31895

SHA512
43dc1425d80e170c645a3e3bb56da8c3acd31bd637329e9e37094ac346ac85434df4edcdbefc05ae00aea33a80a88e2af695997a495611217fe6706075a63c58

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12

Filesize
174B

MD5
690ba661f80d9233c71263a53a6c0b3c

SHA1
ecda75893110d0a18503de4292ab367c702fed8e

SHA256
36bcdddc9efdb4407b6f6ecd84fe7d6108ccf713126740910796154f01ef0582

SHA512
c2827308280f860badd8354e5b903d82843f4a59a83c0a8f154d6abffacf78a8e123eaaaec535f0534049fa2c0d1bf8e9fe1313020060ac34ff8d133cca0885c

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8

Filesize
170B

MD5
105beeac2afd146c2d85038d111cf8a3

SHA1
714b5b837adc01421d994a0694fa3a8f0988222e

SHA256
7e03566f246e4779a70866cfc20bf931426a49293532970841862abe5726b869

SHA512
8399b019d174b33daf8afb3d0bcc61a63dadfeaa0243735aa0591f4c5746d2960f01547924637f8880ab996499cb8163bfed5ba9c46f850f1308d60174b51b9a

Download Submit
C:\Users\Admin\AppData\Local\c2f4fb08-47a1-4510-989e-f2e140e82ccf\5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe

Filesize
710KB

MD5
f8ef98bbaff6ac82dacde20ee90bfa55

SHA1
65761535a352bfeece2a708eaf6a329fc544872e

SHA256
5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de

SHA512
21618fa54b094fa37deeed5ef7e2fba6da13e57dc36119a5fe502e855a81fa5c9530b45a8be1a0333c8aa0ee862eb07f5c4af1c622b79bbfa8b3e4a3285790dd

Download Submit
F:\_readme.txt

Filesize
1KB

MD5
816b68812d5aa2d68eeff78ee6735fc4

SHA1
0eb4b3914ec2098f36686da6b59c53d872023428

SHA256
5bd89a0eaac1f5e7e89482d37d6b36dbaf7d9da869ebab6294a4ecd19bf97ef9

SHA512
6ee8bf859936209374f0bead4d1ce4dd2085e97da3270a22ee4761b2a08954714777342ff554fa6515f2f96d56729f52257dbe8e21bdbbf18d1164b5caf6a68d

Download Submit
memory/1364-45-0x0000000000400000-0x000000000055B000-memory.dmp

Filesize
1.4MB

Download
memory/1364-43-0x0000000000400000-0x000000000055B000-memory.dmp

Filesize
1.4MB

Download
memory/1364-42-0x0000000000400000-0x000000000055B000-memory.dmp

Filesize
1.4MB

Download
memory/3240-31-0x0000000000400000-0x000000000055B000-memory.dmp

Filesize
1.4MB

Download
memory/3240-19-0x0000000000400000-0x000000000055B000-memory.dmp

Filesize
1.4MB

Download
memory/3240-18-0x0000000000400000-0x000000000055B000-memory.dmp

Filesize
1.4MB

Download
memory/3240-26-0x0000000000400000-0x000000000055B000-memory.dmp

Filesize
1.4MB

Download
memory/3240-30-0x0000000000400000-0x000000000055B000-memory.dmp

Filesize
1.4MB

Download
memory/3240-391-0x0000000000400000-0x000000000055B000-memory.dmp

Filesize
1.4MB

Download
memory/5464-14-0x0000000000400000-0x000000000055B000-memory.dmp

Filesize
1.4MB

Download
memory/5464-1-0x00000000009F0000-0x0000000000A86000-memory.dmp

Filesize
600KB

Download
memory/5464-15-0x0000000000B40000-0x0000000000C5A000-memory.dmp

Filesize
1.1MB

Download
memory/5464-16-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5464-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5464-2-0x0000000000B40000-0x0000000000C5A000-memory.dmp

Filesize
1.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads