djvu | 744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751

Analysis

max time kernel
148s
max time network
126s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
24-06-2024 09:08

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General

Target

744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe
Size

780KB
MD5

9bd737b220a4040dbcaf17f48be54a98
SHA1

9a64f521040e7250e8ae523cf2cc8f75753e4cf7
SHA256

744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751
SHA512

135e292c99e65ad22b20d446130f4a96e1de896a642eb5cf262957ad5fe78f867cc980270d8e8b636615ecbf4f539f8330bf1664aea2a1c0005a441d0f838d68
SSDEEP

24576:cOrc1njeVCf3GFh6h8PXzUaoeu9Qdzw9pTG:Zc1jqC4JzUae9m2pG

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://cjto.top/sgfjsgdfgsgddagdpen4/get.php

Attributes

extension
.maas
offline_id
lhxqPpWFK0CiFzpfdXBaKGsuOjwIW2Jm623TOft1
payload_url
http://cjto.top/files/penelop/updatewin1.exe
http://cjto.top/files/penelop/updatewin2.exe
http://cjto.top/files/penelop/updatewin.exe
http://cjto.top/files/penelop/3.exe
http://cjto.top/files/penelop/4.exe
http://cjto.top/files/penelop/5.exe
ransomnote
ATTENTION! Don't worry, you can return all your files! All your files like photos, 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-9fpnK9F5nP 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: 0239yjnkjddrt

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 12 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1684-3-0x0000000002560000-0x000000000267A000-memory.dmp	family_djvu
behavioral1/memory/1684-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1684-27-0x0000000000400000-0x0000000000D09000-memory.dmp	family_djvu
behavioral1/memory/1684-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1684-25-0x0000000002560000-0x000000000267A000-memory.dmp	family_djvu
behavioral1/memory/2728-31-0x0000000000400000-0x0000000000D09000-memory.dmp	family_djvu
behavioral1/memory/2728-32-0x0000000000400000-0x0000000000D09000-memory.dmp	family_djvu
behavioral1/memory/2728-47-0x0000000000400000-0x0000000000D09000-memory.dmp	family_djvu
behavioral1/memory/2728-49-0x0000000000400000-0x0000000000D09000-memory.dmp	family_djvu
behavioral1/memory/2728-52-0x0000000000400000-0x0000000000D09000-memory.dmp	family_djvu
behavioral1/memory/1916-77-0x0000000000400000-0x0000000000D09000-memory.dmp	family_djvu
behavioral1/memory/2728-474-0x0000000000400000-0x0000000000D09000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
Renames multiple (195) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware
Executes dropped EXE 1 IoCs

Processes:

744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe

pid process

1916 744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe
Modifies file permissions 1 TTPs 1 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

icacls.exe

pid process

2692 icacls.exe

pid	process
1916	744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe

pid	process
2692	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3691908287-3775019229-3534252667-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\37cce38a-8d8f-4a20-b150-fc3c2965b6d9\\744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe\" --AutoStart"	744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.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.

Processes:

flow ioc

3 api.2ip.ua
4 api.2ip.ua
9 api.2ip.ua
17 api.2ip.ua
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

flow	ioc
3	api.2ip.ua
4	api.2ip.ua
9	api.2ip.ua
17	api.2ip.ua

Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe

pid	process
1684	744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe
2728	744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe
2728	744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe
1916	744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe
1916	744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe
2728	744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exetaskeng.exe

description	pid	process	target process
PID 1684 wrote to memory of 2692	1684	744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe	icacls.exe
PID 1684 wrote to memory of 2692	1684	744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe	icacls.exe
PID 1684 wrote to memory of 2692	1684	744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe	icacls.exe
PID 1684 wrote to memory of 2692	1684	744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe	icacls.exe
PID 1684 wrote to memory of 2728	1684	744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe	744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe
PID 1684 wrote to memory of 2728	1684	744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe	744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe
PID 1684 wrote to memory of 2728	1684	744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe	744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe
PID 1684 wrote to memory of 2728	1684	744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe	744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe
PID 884 wrote to memory of 1916	884	taskeng.exe	744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe
PID 884 wrote to memory of 1916	884	taskeng.exe	744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe
PID 884 wrote to memory of 1916	884	taskeng.exe	744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe
PID 884 wrote to memory of 1916	884	taskeng.exe	744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe

C:\Users\Admin\AppData\Local\Temp\744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe
"C:\Users\Admin\AppData\Local\Temp\744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe"
1⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1684

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\37cce38a-8d8f-4a20-b150-fc3c2965b6d9" /deny *S-1-1-0:(OI)(CI)(DE,DC)
2⤵
- Modifies file permissions
PID:2692

C:\Users\Admin\AppData\Local\Temp\744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe
"C:\Users\Admin\AppData\Local\Temp\744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe" --Admin IsNotAutoStart IsNotTask
2⤵
- Suspicious behavior: EnumeratesProcesses
PID:2728

C:\Windows\system32\taskeng.exe
taskeng.exe {5DF6847A-6FDD-4E70-82EA-D4217A408047} S-1-5-21-3691908287-3775019229-3534252667-1000:UOTHCPHQ\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:884

C:\Users\Admin\AppData\Local\37cce38a-8d8f-4a20-b150-fc3c2965b6d9\744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe
C:\Users\Admin\AppData\Local\37cce38a-8d8f-4a20-b150-fc3c2965b6d9\744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe --Task
2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:1916

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12
Filesize
1KB

MD5
2365869258df7a66a2121b802ca4afd9

SHA1
73acc30a2edeb9d6830de559bb8a74f35168135d

SHA256
d6b1932822bbd72a8e78c771717d992142348f67d625a42393719fefbe59b0ed

SHA512
795004bab536e128dbd81c188976d37c7b650efbfa5a80374df4c65a1049c27658f4620b7605583928eb167fcb69b4c99e4c8730c507b824a7bde9c7fb0e21f4

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8
Filesize
436B

MD5
1bfe0a81db078ea084ff82fe545176fe

SHA1
50b116f578bd272922fa8eae94f7b02fd3b88384

SHA256
5ba8817f13eee00e75158bad93076ab474a068c6b52686579e0f728fda68499f

SHA512
37c582f3f09f8d80529608c09041295d1644bcc9de6fb8c4669b05339b0dd870f9525abc5eed53ad06a94b51441275504bc943c336c5beb63b53460ba836ca8d

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12
Filesize
174B

MD5
8204f19ef9aa0bd8dd799212044cc4ab

SHA1
e7fc34524f9ee4e91c5c8194c0617d00105f2f34

SHA256
e73c3b9a2dfaa90f63877eb943f6280b6b6f804b03149f45e7af01f60c7bcd39

SHA512
a442cfba828ea0ca1ef78c3b2a48b1e06488083291302df539f3e6c66151b2a632583dfa9f2fe8d9307b61c3dfdedea78da4bf43eee4a10ece850c1ce343d9af

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Filesize
344B

MD5
b7cdc249da742ce87d2197d4d9f0fd4e

SHA1
acb3e69b74abbe76046a46cf4319b38ce7b63bd2

SHA256
77428a7fc08bc754a0feb9be099f1b6e9f5f835bdfce443279b2e815d7211f37

SHA512
9a9868b17c51111cbe9f246b3a9d8d1dc5af796ae854fe59d45acbfb179387ca972790a185fd726191f9acd3697d057d1e06dd80ffbf4bfed211150bf147623e

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8
Filesize
170B

MD5
862aa385598695c07e481ee6f1bce481

SHA1
8c344bf164a196982c848a1314945dc07fbf9455

SHA256
125c0f66cc5d03ed51696dae1ec9760a2988ad22ff5650c9a07da698347fdf5d

SHA512
66d2d90fb1bb2bc3fb250df9fdac8925af5da1f1d532853a11209568f509edec17709b42919dd63c7879342ca0a80a4407cac377ffafbd4ea4727a00f0f657f4

Download Submit
C:\Users\Admin\AppData\Local\37cce38a-8d8f-4a20-b150-fc3c2965b6d9\744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751.exe
Filesize
780KB

MD5
9bd737b220a4040dbcaf17f48be54a98

SHA1
9a64f521040e7250e8ae523cf2cc8f75753e4cf7

SHA256
744ec52f480cb86b7e84fbbfe4b1880f57219dae5683b746f88d6ee4ba394751

SHA512
135e292c99e65ad22b20d446130f4a96e1de896a642eb5cf262957ad5fe78f867cc980270d8e8b636615ecbf4f539f8330bf1664aea2a1c0005a441d0f838d68

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cab5199.tmp
Filesize
68KB

MD5
29f65ba8e88c063813cc50a4ea544e93

SHA1
05a7040d5c127e68c25d81cc51271ffb8bef3568

SHA256
1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184

SHA512
e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa

Download Submit
C:\Users\Admin\AppData\Local\Temp\TarF76A.tmp
Filesize
177KB

MD5
435a9ac180383f9fa094131b173a2f7b

SHA1
76944ea657a9db94f9a4bef38f88c46ed4166983

SHA256
67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34

SHA512
1a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a

Download Submit
memory/1684-28-0x0000000004B30000-0x0000000005439000-memory.dmp

Filesize
9.0MB

Download
memory/1684-25-0x0000000002560000-0x000000000267A000-memory.dmp

Filesize
1.1MB

Download
memory/1684-1-0x0000000000D80000-0x0000000000E11000-memory.dmp

Filesize
580KB

Download
memory/1684-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1684-27-0x0000000000400000-0x0000000000D09000-memory.dmp

Filesize
9.0MB

Download
memory/1684-0-0x0000000000400000-0x0000000000D09000-memory.dmp

Filesize
9.0MB

Download
memory/1684-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1684-3-0x0000000002560000-0x000000000267A000-memory.dmp

Filesize
1.1MB

Download
memory/1684-2-0x0000000000D80000-0x0000000000E11000-memory.dmp

Filesize
580KB

Download
memory/1916-63-0x0000000000400000-0x0000000000D09000-memory.dmp

Filesize
9.0MB

Download
memory/1916-77-0x0000000000400000-0x0000000000D09000-memory.dmp

Filesize
9.0MB

Download
memory/1916-65-0x00000000024A0000-0x0000000002531000-memory.dmp

Filesize
580KB

Download
memory/2728-32-0x0000000000400000-0x0000000000D09000-memory.dmp

Filesize
9.0MB

Download
memory/2728-49-0x0000000000400000-0x0000000000D09000-memory.dmp

Filesize
9.0MB

Download
memory/2728-52-0x0000000000400000-0x0000000000D09000-memory.dmp

Filesize
9.0MB

Download
memory/2728-47-0x0000000000400000-0x0000000000D09000-memory.dmp

Filesize
9.0MB

Download
memory/2728-29-0x0000000000400000-0x0000000000D09000-memory.dmp

Filesize
9.0MB

Download
memory/2728-31-0x0000000000400000-0x0000000000D09000-memory.dmp

Filesize
9.0MB

Download
memory/2728-30-0x00000000002A0000-0x0000000000331000-memory.dmp

Filesize
580KB

Download
memory/2728-474-0x0000000000400000-0x0000000000D09000-memory.dmp

Filesize
9.0MB

Download