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

Signatures

Detected Djvu ransomware 10 IoCs

resource	yara_rule
behavioral1/memory/2084-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2084-2-0x00000000006E0000-0x00000000007FA000-memory.dmp	family_djvu
behavioral1/memory/2084-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2084-24-0x00000000006E0000-0x00000000007FA000-memory.dmp	family_djvu
behavioral1/memory/2084-23-0x0000000000400000-0x000000000055B000-memory.dmp	family_djvu
behavioral1/memory/2156-29-0x0000000000400000-0x000000000055B000-memory.dmp	family_djvu
behavioral1/memory/2156-44-0x0000000000400000-0x000000000055B000-memory.dmp	family_djvu
behavioral1/memory/2156-46-0x0000000000400000-0x000000000055B000-memory.dmp	family_djvu
behavioral1/memory/2156-49-0x0000000000400000-0x000000000055B000-memory.dmp	family_djvu
behavioral1/memory/1712-71-0x0000000000400000-0x000000000055B000-memory.dmp	family_djvu

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

Executes dropped EXE 1 IoCs

pid	Process
1712	5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2740	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-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\9d69b2ba-462c-46a9-89e8-f2ed5f9865b5\\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
23	api.2ip.ua
3	api.2ip.ua
4	api.2ip.ua
9	api.2ip.ua

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

System Information Discovery
T1082

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 6 IoCs

pid	Process
2084	5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe
2084	5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe
2156	5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe
2156	5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe
1712	5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe
1712	5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2084 wrote to memory of 2740	2084	5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe	31
PID 2084 wrote to memory of 2740	2084	5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe	31
PID 2084 wrote to memory of 2740	2084	5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe	31
PID 2084 wrote to memory of 2740	2084	5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe	31
PID 2084 wrote to memory of 2156	2084	5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe	32
PID 2084 wrote to memory of 2156	2084	5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe	32
PID 2084 wrote to memory of 2156	2084	5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe	32
PID 2084 wrote to memory of 2156	2084	5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe	32
PID 1700 wrote to memory of 1712	1700	taskeng.exe	39
PID 1700 wrote to memory of 1712	1700	taskeng.exe	39
PID 1700 wrote to memory of 1712	1700	taskeng.exe	39
PID 1700 wrote to memory of 1712	1700	taskeng.exe	39

C:\Users\Admin\AppData\Local\Temp\5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe
"C:\Users\Admin\AppData\Local\Temp\5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe"
1⤵
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2084
- C:\Windows\SysWOW64\icacls.exe
  icacls "C:\Users\Admin\AppData\Local\9d69b2ba-462c-46a9-89e8-f2ed5f9865b5" /deny *S-1-1-0:(OI)(CI)(DE,DC)
  2⤵
  - Modifies file permissions
  - System Location Discovery: System Language Discovery
  PID:2740
- 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:2156

C:\Windows\system32\taskeng.exe
taskeng.exe {6B4D6879-D72B-4ADE-8E3E-93145B5FFCFA} S-1-5-21-3533259084-2542256011-65585152-1000:XPAJOTIY\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1700
- C:\Users\Admin\AppData\Local\9d69b2ba-462c-46a9-89e8-f2ed5f9865b5\5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe
  C:\Users\Admin\AppData\Local\9d69b2ba-462c-46a9-89e8-f2ed5f9865b5\5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe --Task
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:1712

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

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

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
018e6cb9f1b288f92389fa97a1fc6563

SHA1
1f4b3ffc16337c2aef7d064da8ed50f66fa53958

SHA256
d2645d5ac8efc77bb7b8e1e5915b74b036a8c055e185ed42d4b36634430764d7

SHA512
3b16c037a32ba41ee9a2e6d1477fbfb6260d202a3115b499e186fd7cc0cf33015d7b4e2ee84ad8850779730fe4dfd77edd53e31f66fe9af6e3c845afaa0b4d15

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

Filesize
342B

MD5
15241af5a6485f105275242d25693c2e

SHA1
f65dd46bbe0ab1572e175222b66407cfe476263e

SHA256
cdcccf4f7e2986f5402c6c42ca853d6a43eda33436a6ee09e6963aefcecba42f

SHA512
11cbb2bd75612d4300f103873990b36966bd70c5a89276086a53775318b81abb6ad26b6c4d4b985767ea44694584ea0ee1c2631c6a61843d9471ee2df5cf2d67

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

Filesize
170B

MD5
11d474ee0fdcaa1a9140ab483165977d

SHA1
bf7dc35153085da2e0041f456cd90c983be0e240

SHA256
c55887727ac4fa7be32a924d36f8bbc46dc5608faa1ad694a571cd5bd1808f8d

SHA512
6735236eb9aedf6d63367f2293d9ddb6e99b12745df9b0f88de65a27989ff26fa25750ab1fb7517eb2cf6ee2279e7dedd61682479126eb2e70de152e5440d8ef

Download Submit
C:\Users\Admin\AppData\Local\9d69b2ba-462c-46a9-89e8-f2ed5f9865b5\5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de.exe

Filesize
710KB

MD5
f8ef98bbaff6ac82dacde20ee90bfa55

SHA1
65761535a352bfeece2a708eaf6a329fc544872e

SHA256
5af0f5b0bada5b7aaa681eddebc47734267af06eb39610590a625315f449d4de

SHA512
21618fa54b094fa37deeed5ef7e2fba6da13e57dc36119a5fe502e855a81fa5c9530b45a8be1a0333c8aa0ee862eb07f5c4af1c622b79bbfa8b3e4a3285790dd

Download Submit
C:\Users\Admin\AppData\Local\Temp\CabF2D7.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\TarB5F8.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
memory/1712-71-0x0000000000400000-0x000000000055B000-memory.dmp

Filesize
1.4MB

Download
memory/1712-61-0x0000000000340000-0x00000000003D1000-memory.dmp

Filesize
580KB

Download
memory/2084-25-0x0000000000640000-0x00000000006D1000-memory.dmp

Filesize
580KB

Download
memory/2084-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2084-1-0x0000000000640000-0x00000000006D1000-memory.dmp

Filesize
580KB

Download
memory/2084-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2084-23-0x0000000000400000-0x000000000055B000-memory.dmp

Filesize
1.4MB

Download
memory/2084-24-0x00000000006E0000-0x00000000007FA000-memory.dmp

Filesize
1.1MB

Download
memory/2084-0-0x0000000000640000-0x00000000006D1000-memory.dmp

Filesize
580KB

Download
memory/2084-2-0x00000000006E0000-0x00000000007FA000-memory.dmp

Filesize
1.1MB

Download
memory/2156-44-0x0000000000400000-0x000000000055B000-memory.dmp

Filesize
1.4MB

Download
memory/2156-46-0x0000000000400000-0x000000000055B000-memory.dmp

Filesize
1.4MB

Download
memory/2156-49-0x0000000000400000-0x000000000055B000-memory.dmp

Filesize
1.4MB

Download
memory/2156-29-0x0000000000400000-0x000000000055B000-memory.dmp

Filesize
1.4MB

Download
memory/2156-27-0x0000000000280000-0x0000000000311000-memory.dmp

Filesize
580KB

Download
memory/2156-28-0x0000000000400000-0x000000000055B000-memory.dmp

Filesize
1.4MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads