djvu | cfb961347c192bd6dfa4e8b86b9a6eb04fca7f29b51b577ffa1465e7a75c733d

General

Target

file.exe
Size

809KB
MD5

bd7beb7562fbbb5d6a7773f879389d32
SHA1

993ad0a915e475bafb3833b61a36818481dd55aa
SHA256

cfb961347c192bd6dfa4e8b86b9a6eb04fca7f29b51b577ffa1465e7a75c733d
SHA512

d762255b0cb9095b72f8b4d5821559f2134c6de28e4e7072e78a42870647d9ff1375afc33d7c6b46ba7fff509ab6f4724e4842abf47eb1c1a41e72783dbf38ba
SSDEEP

12288:x1lw2NU9n4c7lB5P5ZQwshmMs5OR2aX+975V3BOh6Z5EGyjShHT0q78nDHrJ:x1lwxD7TzZQHmR5OR2aXgrRqj6HTh2

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://zexeq.com/test2/get.php

Attributes

extension
.lomx
offline_id
NrqpaQRhQqq5l2tBPp1QS34I3ME2IKsAlZ0A9pt1
payload_url
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-MhbiRFXgXD 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: 0839ASdw

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 16 IoCs

resource	yara_rule
behavioral2/memory/3132-2-0x00000000027B0000-0x00000000028CB000-memory.dmp	family_djvu
behavioral2/memory/2976-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2976-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2976-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2976-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2976-15-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2804-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2804-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2804-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2804-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2804-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2804-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2804-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2804-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2804-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2804-38-0x0000000000400000-0x0000000000537000-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-1-5-21-1232405761-1209240240-3206092754-1000\Control Panel\International\Geo\Nation	file.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
768	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-1-5-21-1232405761-1209240240-3206092754-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\9c4f600f-a1af-4006-85e7-51cf2c986715\\file.exe\" --AutoStart"	file.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.

flow	ioc
7	api.2ip.ua
9	api.2ip.ua
27	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3132 set thread context of 2976	3132	file.exe	89
PID 3888 set thread context of 2804	3888	file.exe	95

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2976	file.exe
2976	file.exe
2804	file.exe
2804	file.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3132 wrote to memory of 2976	3132	file.exe	89
PID 3132 wrote to memory of 2976	3132	file.exe	89
PID 3132 wrote to memory of 2976	3132	file.exe	89
PID 3132 wrote to memory of 2976	3132	file.exe	89
PID 3132 wrote to memory of 2976	3132	file.exe	89
PID 3132 wrote to memory of 2976	3132	file.exe	89
PID 3132 wrote to memory of 2976	3132	file.exe	89
PID 3132 wrote to memory of 2976	3132	file.exe	89
PID 3132 wrote to memory of 2976	3132	file.exe	89
PID 3132 wrote to memory of 2976	3132	file.exe	89
PID 2976 wrote to memory of 768	2976	file.exe	92
PID 2976 wrote to memory of 768	2976	file.exe	92
PID 2976 wrote to memory of 768	2976	file.exe	92
PID 2976 wrote to memory of 3888	2976	file.exe	94
PID 2976 wrote to memory of 3888	2976	file.exe	94
PID 2976 wrote to memory of 3888	2976	file.exe	94
PID 3888 wrote to memory of 2804	3888	file.exe	95
PID 3888 wrote to memory of 2804	3888	file.exe	95
PID 3888 wrote to memory of 2804	3888	file.exe	95
PID 3888 wrote to memory of 2804	3888	file.exe	95
PID 3888 wrote to memory of 2804	3888	file.exe	95
PID 3888 wrote to memory of 2804	3888	file.exe	95
PID 3888 wrote to memory of 2804	3888	file.exe	95
PID 3888 wrote to memory of 2804	3888	file.exe	95
PID 3888 wrote to memory of 2804	3888	file.exe	95
PID 3888 wrote to memory of 2804	3888	file.exe	95

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3132
- C:\Users\Admin\AppData\Local\Temp\file.exe
  "C:\Users\Admin\AppData\Local\Temp\file.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2976
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\9c4f600f-a1af-4006-85e7-51cf2c986715" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:768
- - C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3888
  - - C:\Users\Admin\AppData\Local\Temp\file.exe
      "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2804

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
1KB

MD5
d3bc2972a5ce7aa6355ffeff2f781b0c

SHA1
aae73ca3a2cd0f7b1dd83f8daa6c80cf24f53486

SHA256
30693befccb9a17295ef589e595930adcb2da1013e14a01e45b8fb049b929819

SHA512
e1631a141b890432f882e02683cdbe4b60a1cc4d60a2461a6aa658fca949c33080bb04c88ab1912bef66b54b54086807f9373b66e6b1ca4d96a0c341cd6972d3

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
48f420ca87e49c592b26b43f4c6b8f5c

SHA1
a7eaea37fa963e31e5ecde0022bb4a490b2d5d06

SHA256
e46c6d0e255b857c6c65e257a8785e498ffcae7c05fb9feb7ad33a3a54fc2237

SHA512
ac42e04a996baf8c72b0c8a5a20ef3834d5873dc46ef54018869c384da711f3d1c370a37acf44d75eb2a98202bb5bc2b31965569114b5df4e2603ddb1463899a

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

Filesize
392B

MD5
cc00b6cb5c813e11fe40761d23ab39b5

SHA1
d2e79cc8465c19d59e76159e57335afd1bc10e93

SHA256
4fd8b68c1a97269de9b563177b4b9b72f7c445765cfae73e24cbb62d753ddb1a

SHA512
e5ce63c818625f64576b289dbc2f386c854c8fd9943a051420c03a825de005f161a95818b47fba11bbad1275af9f5cfcd6c85051fa7ab0c23e93e28a483a3e83

Download Submit
C:\Users\Admin\AppData\Local\9c4f600f-a1af-4006-85e7-51cf2c986715\file.exe

Filesize
298KB

MD5
f793f54db877c37f4a7fcd45f958893a

SHA1
a79c8dc04a229dc4eac1e7a810da909cbe84cff3

SHA256
260f029c80f7d9dce6eb558ec1da9471de1f641e5df3d987e06345673a6878e2

SHA512
ef3f42f665c350e54918b47742e1f2a31d39c635db37baa5fa3531e833f98eb467abbe6199385230e8535bc3e53f734f1364b0cf120fbce60bbbce86aa2f6151

Download Submit
memory/2804-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2804-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2804-38-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2804-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2804-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2804-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2804-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2804-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2804-33-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2804-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2976-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2976-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2976-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2976-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2976-15-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3132-2-0x00000000027B0000-0x00000000028CB000-memory.dmp

Filesize
1.1MB

Download
memory/3132-1-0x00000000026C0000-0x000000000275D000-memory.dmp

Filesize
628KB

Download
memory/3888-18-0x0000000002600000-0x000000000269A000-memory.dmp

Filesize
616KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads