djvu | c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f

General

Target

c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
Size

751KB
MD5

a7a2d00c9c52d5b3687c4316a5ee67be
SHA1

0a1bf7d283320fb9416e6cc60011bf2058249d93
SHA256

c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f
SHA512

0a6a6cdba593e2f74b11ff2b9412b1218fec673779da862ccc886fbbb9430b54618eaef5aaa88da5d5a53b2bddf9296b15e6f36e15771acf216a61496be71636
SSDEEP

12288:jd+8zJ6wTm6I9ML4eNA0+Rf0aftj7NLZadzYJ04QALAxBmr0GrnttB9ZBBHH:jd3pmvq7NA0+Pfl7NFadzu04QqA7mr0e

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://cajgtus.com/test1/get.php

Attributes

extension
.bgjs
offline_id
Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1
payload_url
http://sdfjhuz.com/dl/build2.exe

http://cajgtus.com/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. Do not ask assistants from youtube and recovery data sites for help in recovering your data. They can use your free decryption quota and scam you. Our contact is emails in this text document only. You can get and look video overview decrypt tool: https://wetransfer.com/downloads/54cdfd152fe98eedb628a1f4ddb7076420240421150208/403a27 Price of private key and decrypt software is $999. Discount 50% available if you contact us first 72 hours, that's price for you is $499. 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: 0863PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2892-2-0x0000000004C20000-0x0000000004D3B000-memory.dmp	family_djvu
behavioral2/memory/1148-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1148-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1148-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1148-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1148-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4748-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4748-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4748-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4748-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4748-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4748-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4748-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4748-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4748-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4748-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4748-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
Modifies file permissions 1 TTPs 1 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

icacls.exe

pid process

540 icacls.exe

pid	process
540	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3263309122-2820180308-3568046652-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\2967cc99-fba5-448c-896b-23b5e9fe3fe0\\c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe\" --AutoStart"	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe

Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

1 api.2ip.ua
2 api.2ip.ua
7 api.2ip.ua

flow	ioc
1	api.2ip.ua
2	api.2ip.ua
7	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

Processes:

c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exec956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe

description	pid	process	target process
PID 2892 set thread context of 1148	2892	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 960 set thread context of 4748	960	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exec956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe

pid	process
1148	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
1148	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
4748	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
4748	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exec956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exec956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe

C:\Users\Admin\AppData\Local\Temp\c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
"C:\Users\Admin\AppData\Local\Temp\c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2892
- C:\Users\Admin\AppData\Local\Temp\c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
  "C:\Users\Admin\AppData\Local\Temp\c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1148
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\2967cc99-fba5-448c-896b-23b5e9fe3fe0" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:540
- - C:\Users\Admin\AppData\Local\Temp\c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
    "C:\Users\Admin\AppData\Local\Temp\c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:960
  - - C:\Users\Admin\AppData\Local\Temp\c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
      "C:\Users\Admin\AppData\Local\Temp\c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4748

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Filesize
1KB

MD5
132a59b12289f608ea38eb370d498a8f

SHA1
0fd8a23d395d38719cb0b71ee10df56ce35a6c4c

SHA256
d6fcf2cd41b542b6d7ee6daa10cf080f4b6220cbce855be03d689d1ad080ed9b

SHA512
ea953e93faf4c78e1b9e3768a463f6b46548af00b430ebd275054f7da1e1f4c40746bd3ff4ca02c0fd107bf78b02b67069075939b719c00a7e4bc2f4ecb46da1

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Filesize
724B

MD5
8202a1cd02e7d69597995cabbe881a12

SHA1
8858d9d934b7aa9330ee73de6c476acf19929ff6

SHA256
58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5

SHA512
97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Filesize
410B

MD5
be9bb0fc1c882a5467c48b191e153aaf

SHA1
29dc744a6486b68a2026659c0abe3575c56f510e

SHA256
6a1212282bd96f194d0679be9c88dd053db4b389376f1ab81b405cc2468db601

SHA512
1fa30f2bb0bc5fcba40990060c3123092ba670268aece8c24e2933be362b47b085279d5fac1fd64a574f6a44b72a0ff527884117d6d11707cfe9e0ced96bd404

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Filesize
392B

MD5
4c6c3052879111a7686f655bdc4ad564

SHA1
ab890d6ea1c07f6640148be4017b6dad6513baa4

SHA256
2222b966a894920fc3e972dc1640898793c6121a575807fd8fe7c4ab8523d3d6

SHA512
b73a4144c2d50caf5954e754d7e10f5b698b3b9fa3cee50b253d284b5e51fa8d214067d8d7a24b56be438b164463800dfa7561e8a7ab8c136d39d7b282b1cbb9

Download Submit
C:\Users\Admin\AppData\Local\2967cc99-fba5-448c-896b-23b5e9fe3fe0\c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe

Filesize
751KB

MD5
a7a2d00c9c52d5b3687c4316a5ee67be

SHA1
0a1bf7d283320fb9416e6cc60011bf2058249d93

SHA256
c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f

SHA512
0a6a6cdba593e2f74b11ff2b9412b1218fec673779da862ccc886fbbb9430b54618eaef5aaa88da5d5a53b2bddf9296b15e6f36e15771acf216a61496be71636

Download Submit
memory/960-21-0x0000000003100000-0x000000000319C000-memory.dmp

Filesize
624KB

Download
memory/1148-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1148-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1148-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1148-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1148-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2892-1-0x00000000032C0000-0x0000000003357000-memory.dmp

Filesize
604KB

Download
memory/2892-2-0x0000000004C20000-0x0000000004D3B000-memory.dmp

Filesize
1.1MB

Download
memory/4748-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4748-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4748-23-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4748-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4748-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4748-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4748-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4748-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4748-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4748-38-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4748-39-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

description	pid	process	target process
PID 2892 wrote to memory of 1148	2892	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 2892 wrote to memory of 1148	2892	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 2892 wrote to memory of 1148	2892	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 2892 wrote to memory of 1148	2892	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 2892 wrote to memory of 1148	2892	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 2892 wrote to memory of 1148	2892	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 2892 wrote to memory of 1148	2892	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 2892 wrote to memory of 1148	2892	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 2892 wrote to memory of 1148	2892	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 2892 wrote to memory of 1148	2892	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 1148 wrote to memory of 540	1148	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	icacls.exe
PID 1148 wrote to memory of 540	1148	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	icacls.exe
PID 1148 wrote to memory of 540	1148	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	icacls.exe
PID 1148 wrote to memory of 960	1148	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 1148 wrote to memory of 960	1148	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 1148 wrote to memory of 960	1148	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 960 wrote to memory of 4748	960	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 960 wrote to memory of 4748	960	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 960 wrote to memory of 4748	960	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 960 wrote to memory of 4748	960	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 960 wrote to memory of 4748	960	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 960 wrote to memory of 4748	960	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 960 wrote to memory of 4748	960	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 960 wrote to memory of 4748	960	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 960 wrote to memory of 4748	960	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 960 wrote to memory of 4748	960	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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