djvu | f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f

Analysis

max time kernel
150s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
27/05/2024, 01:25

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General

Target
f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe
Size 785KB
Sample240527-btff3sbc9x
SHA256 f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f
MD5 0d4d8f1fbf7ef6cc30dfc1b267b0cd2c
SHA1 5e4c154733ec0964ac050b32ec54bfffa7def0fc
SHA512 19f181995db6ca50a7f89f63fcc3ed6836c5b6de7fcd50db2f24fd6a098042b85b3c71264fa480c8b49e100468604cf3976453274e41d0e80db33c3d9e253c12
SSDEEP 12288:3/2PQ0JBxk/q//UmITXZZ2HcHJK3oFziEcybA6deZ3V5M:3/o/GqnlIzwIJKAzcyk6k5V6
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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 15 IoCs

resource	yara_rule
behavioral2/memory/2344-4-0x0000000004AD0000-0x0000000004BEB000-memory.dmp	family_djvu
behavioral2/memory/1220-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1220-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1220-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1220-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1220-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1208-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1208-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1208-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1208-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1208-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1208-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1208-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1208-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1208-37-0x0000000000400000-0x0000000000537000-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

pid	Process
3280	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-1-5-21-1672260578-815027929-964132517-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\f4b0dec9-1ad8-47fb-9031-2071f5393167\\f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe\" --AutoStart"	f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.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
1	api.2ip.ua
2	api.2ip.ua
6	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2344 set thread context of 1220	2344	f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe	80
PID 1692 set thread context of 1208	1692	f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe	86

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
1220	f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe
1220	f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe
1208	f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe
1208	f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2344 wrote to memory of 1220	2344	f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe	80
PID 2344 wrote to memory of 1220	2344	f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe	80
PID 2344 wrote to memory of 1220	2344	f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe	80
PID 2344 wrote to memory of 1220	2344	f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe	80
PID 2344 wrote to memory of 1220	2344	f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe	80
PID 2344 wrote to memory of 1220	2344	f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe	80
PID 2344 wrote to memory of 1220	2344	f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe	80
PID 2344 wrote to memory of 1220	2344	f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe	80
PID 2344 wrote to memory of 1220	2344	f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe	80
PID 2344 wrote to memory of 1220	2344	f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe	80
PID 1220 wrote to memory of 3280	1220	f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe	81
PID 1220 wrote to memory of 3280	1220	f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe	81
PID 1220 wrote to memory of 3280	1220	f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe	81
PID 1220 wrote to memory of 1692	1220	f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe	82
PID 1220 wrote to memory of 1692	1220	f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe	82
PID 1220 wrote to memory of 1692	1220	f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe	82
PID 1692 wrote to memory of 1208	1692	f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe	86
PID 1692 wrote to memory of 1208	1692	f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe	86
PID 1692 wrote to memory of 1208	1692	f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe	86
PID 1692 wrote to memory of 1208	1692	f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe	86
PID 1692 wrote to memory of 1208	1692	f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe	86
PID 1692 wrote to memory of 1208	1692	f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe	86
PID 1692 wrote to memory of 1208	1692	f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe	86
PID 1692 wrote to memory of 1208	1692	f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe	86
PID 1692 wrote to memory of 1208	1692	f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe	86
PID 1692 wrote to memory of 1208	1692	f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe	86

C:\Users\Admin\AppData\Local\Temp\f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe
"C:\Users\Admin\AppData\Local\Temp\f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2344
- C:\Users\Admin\AppData\Local\Temp\f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe
  "C:\Users\Admin\AppData\Local\Temp\f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1220
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\f4b0dec9-1ad8-47fb-9031-2071f5393167" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3280
- - C:\Users\Admin\AppData\Local\Temp\f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe
    "C:\Users\Admin\AppData\Local\Temp\f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1692
  - - C:\Users\Admin\AppData\Local\Temp\f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe
      "C:\Users\Admin\AppData\Local\Temp\f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1208

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

File and Directory Permissions Modification

T1222

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 1KB
SHA256 429412943115645502abfc1e90de01f05cdaa465b794622eb219bece495760b3
MD5 619e0289640d6c5c4b2a6cd1a2029297
SHA1 d01efa5d51791af317b72ad548d2f5e63cf26e04
SHA512 3caa45448c44aa009f647cf3b8ac1bbe1add4a1a1e0faeebf47d56aca67dd81a5c3a9470fed1075e92b939fa66af1b4b8e71306331dc7846fb30a792bfd2eefc
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 724B
SHA256 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
MD5 8202a1cd02e7d69597995cabbe881a12
SHA1 8858d9d934b7aa9330ee73de6c476acf19929ff6
SHA512 97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9
MD5 SHA1 SHA512

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24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 410B
SHA256 252d7144469955f88ea5bd339136cec48cd0b846c7c74bf96e2422e35e9cee4d
MD5 6dc6658056b0ee712d47d6434dd660f5
SHA1 e3950997d633e5e4f1aa57b5b17b61b3e9c394bc
SHA512 72a20558216cc5acf61045d76b84485a1f32708fb1c9ab67bff0f32b67a1a95c2368805e3d0dbe9592b2662150bcefb3d436a62200cf104a2a600e8e06427856
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 dc0144ecb53f5be037025bd219563f058cd21d2188d3d56008c5b2738384c798
MD5 57c7a913e121311f75c49bded5910e22
SHA1 5116cdd504e256acc3373afb808a29ebea564e17
SHA512 84e128605b0cc284a91efa143835b281a3a2f073147c2acdf9d7376e00a1192c21bc00bd1be9ffdf5074ef460b896b0e63b55825b780a715d41b302937440780
MD5 SHA1 SHA512

Submit Download

f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe

Path C:\Users\Admin\AppData\Local\f4b0dec9-1ad8-47fb-9031-2071f5393167\f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f.exe
Size 785KB
SHA256 f1068bf1348c18992c05859a866a75203ed9da51f418541ea2405a23136a579f
MD5 0d4d8f1fbf7ef6cc30dfc1b267b0cd2c
SHA1 5e4c154733ec0964ac050b32ec54bfffa7def0fc
SHA512 19f181995db6ca50a7f89f63fcc3ed6836c5b6de7fcd50db2f24fd6a098042b85b3c71264fa480c8b49e100468604cf3976453274e41d0e80db33c3d9e253c12
SSDEEP 12288:3/2PQ0JBxk/q//UmITXZZ2HcHJK3oFziEcybA6deZ3V5M:3/o/GqnlIzwIJKAzcyk6k5V6
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1208-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1208-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1208-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1208-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1208-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1208-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1208-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1208-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1208-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1220-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1220-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1220-2-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1220-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1220-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2344-4-0x0000000004AD0000-0x0000000004BEB000-memory.dmp

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memory/2344-1-0x0000000004A30000-0x0000000004ACF000-memory.dmp

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