djvu | de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae

General

Target

de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe
Size

771KB
MD5

9150c3fd4ca2d35c37112c9d14c4b819
SHA1

53e49af0a9efe9732a413aa230cd4c44e40e19bb
SHA256

de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae
SHA512

f3c05af0b4704f0862a182cbff27d00dedf9296abd20daa3fb6adfe2b59866830331409ecc28dbd43f45261022b4ac6dd2a782e6f65e0e78169acadfb9a90ed0
SSDEEP

24576:odXSgFnV+QBlX76l829f7Pj1+hpe0/kHsVN:+NFc4l7YV0LDk

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.vepi
offline_id
EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1
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/33b490a613f49fa190924f199d2c079e20240512191214/caaf73 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: 0871PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 16 IoCs

resource	yara_rule
behavioral1/memory/4544-1-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3440-4-0x0000000003CE0000-0x0000000003DFB000-memory.dmp	family_djvu
behavioral1/memory/4544-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4544-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4544-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4544-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2908-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2908-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2908-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2908-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2908-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2908-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2908-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1692-37-0x0000000000400000-0x000000000200C000-memory.dmp	family_djvu
behavioral1/memory/2908-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2908-39-0x0000000000400000-0x0000000000537000-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-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation	de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4388	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-1-5-21-2804150937-2146708401-419095071-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\4dd971de-9650-42cd-bb48-9ac1ffa3efec\\de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe\" --AutoStart"	de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.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
3	api.2ip.ua
4	api.2ip.ua
9	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3440 set thread context of 4544	3440	de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe	83
PID 1692 set thread context of 2908	1692	de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe	87

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
4544	de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe
4544	de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe
2908	de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe
2908	de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3440 wrote to memory of 4544	3440	de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe	83
PID 3440 wrote to memory of 4544	3440	de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe	83
PID 3440 wrote to memory of 4544	3440	de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe	83
PID 3440 wrote to memory of 4544	3440	de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe	83
PID 3440 wrote to memory of 4544	3440	de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe	83
PID 3440 wrote to memory of 4544	3440	de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe	83
PID 3440 wrote to memory of 4544	3440	de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe	83
PID 3440 wrote to memory of 4544	3440	de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe	83
PID 3440 wrote to memory of 4544	3440	de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe	83
PID 3440 wrote to memory of 4544	3440	de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe	83
PID 4544 wrote to memory of 4388	4544	de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe	84
PID 4544 wrote to memory of 4388	4544	de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe	84
PID 4544 wrote to memory of 4388	4544	de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe	84
PID 4544 wrote to memory of 1692	4544	de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe	85
PID 4544 wrote to memory of 1692	4544	de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe	85
PID 4544 wrote to memory of 1692	4544	de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe	85
PID 1692 wrote to memory of 2908	1692	de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe	87
PID 1692 wrote to memory of 2908	1692	de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe	87
PID 1692 wrote to memory of 2908	1692	de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe	87
PID 1692 wrote to memory of 2908	1692	de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe	87
PID 1692 wrote to memory of 2908	1692	de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe	87
PID 1692 wrote to memory of 2908	1692	de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe	87
PID 1692 wrote to memory of 2908	1692	de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe	87
PID 1692 wrote to memory of 2908	1692	de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe	87
PID 1692 wrote to memory of 2908	1692	de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe	87
PID 1692 wrote to memory of 2908	1692	de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe	87

C:\Users\Admin\AppData\Local\Temp\de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe
"C:\Users\Admin\AppData\Local\Temp\de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3440
- C:\Users\Admin\AppData\Local\Temp\de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe
  "C:\Users\Admin\AppData\Local\Temp\de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4544
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\4dd971de-9650-42cd-bb48-9ac1ffa3efec" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4388
- - C:\Users\Admin\AppData\Local\Temp\de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe
    "C:\Users\Admin\AppData\Local\Temp\de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1692
  - - C:\Users\Admin\AppData\Local\Temp\de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe
      "C:\Users\Admin\AppData\Local\Temp\de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2908

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

Replay Monitor

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Downloads

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

Filesize
1KB

MD5
2b79576931f7278028f9fcc700d932d2

SHA1
84f199382ad7efa564324e559dd9d0586d518fd7

SHA256
990697f2eed9d44971a4eaeec7c0ddd2822c683683bec33dff51ac1fcc07b059

SHA512
1aaef7b8a3e8e5e9dbcca8daadef4951b1467d76c4a3cfb39328c5dc21431bf68bfb1660ba403a755504e2611f864a27847a08a5d3dd6b63c7489d230f99ec24

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
0595796a55582482dc58e114c416c62d

SHA1
f8e13af0a0d67914aab14352b6268ce887d75130

SHA256
edf06ce0dbd692a99365bd6a48ea1e5870175336e371726c65544fd029bb1318

SHA512
ba5796a6e67903a1958d2fb75325a542676232c30103307a9c4c4689cbe49f07bf53d77f3d8337d0ba054ed5edbee6da29b5fa9181d95c9d335bafd9550b3183

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

Filesize
392B

MD5
90cbd1e519e4c2b6064ac76fdf1b5a42

SHA1
5260d7d7c179caf7acb101e6f1410fff91a01ce2

SHA256
1d5c6d1e608ebe8a0675c674bad41bc0385c0baac504099944ebb9d4d2bf560f

SHA512
0f20e48a9c2d05409a97b23204fd180a2b7fac8a7b01496ec90fbba29c03944e95ad8ed3359fb59e3da068f2c426fbe7e20d67548e8865af19b398e0343fb923

Download Submit
C:\Users\Admin\AppData\Local\4dd971de-9650-42cd-bb48-9ac1ffa3efec\de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae.exe

Filesize
771KB

MD5
9150c3fd4ca2d35c37112c9d14c4b819

SHA1
53e49af0a9efe9732a413aa230cd4c44e40e19bb

SHA256
de171c2dcca67b8dc005a38ac8f306c0fb3927be8fd1820cd0f5ec7f2fa5d2ae

SHA512
f3c05af0b4704f0862a182cbff27d00dedf9296abd20daa3fb6adfe2b59866830331409ecc28dbd43f45261022b4ac6dd2a782e6f65e0e78169acadfb9a90ed0

Download Submit
memory/1692-23-0x0000000000400000-0x000000000200C000-memory.dmp

Filesize
28.0MB

Download
memory/1692-37-0x0000000000400000-0x000000000200C000-memory.dmp

Filesize
28.0MB

Download
memory/2908-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2908-33-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2908-39-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2908-38-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2908-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2908-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2908-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2908-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2908-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3440-2-0x0000000002010000-0x00000000020AA000-memory.dmp

Filesize
616KB

Download
memory/3440-4-0x0000000003CE0000-0x0000000003DFB000-memory.dmp

Filesize
1.1MB

Download
memory/4544-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4544-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4544-1-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4544-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4544-19-0x0000000000400000-0x0000000000537000-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