djvu | 567ed29376b1cdfc820544d6d8e38d58187476a0b911226d5cb8e95f69dcba6f

Analysis

max time kernel
148s
max time network
122s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
15-06-2024 16:55

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General

Target

file.exe
Size

824KB
MD5

9b3e38e023020228484dcc008d6f6e52
SHA1

16a218483c71a8edeb7c43a9ff3696e53c586ef2
SHA256

567ed29376b1cdfc820544d6d8e38d58187476a0b911226d5cb8e95f69dcba6f
SHA512

0f46c3509890560a4c753efb5d6b940b545a2619b277c536fae8cb2dab280def9afd61b7d7d7e0ab08a879dcf2288705e92a3066b37da1a1c2b0e0ca64e98399
SSDEEP

24576:ATJYdNu+4/LN1WKVQ7A6WNETiczoc9myk:AGV4/LK+pPwRNmy

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.watz
offline_id
Lc3VTezPWbMhuVAQFzJUdeA68PwI7UDpc5aKHYt1
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. 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/abe121434ad837dd5bdd03878a14485820240531135509/34284d 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: 0874PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1584-6-0x0000000001EF0000-0x000000000200B000-memory.dmp	family_djvu
behavioral1/memory/3044-7-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3044-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3044-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3044-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1956-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1956-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1956-55-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1956-56-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1956-54-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1956-57-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1956-59-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1956-61-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1956-62-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1956-63-0x0000000000400000-0x0000000000537000-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

1624 icacls.exe

pid	process
1624	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

file.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\a572a7ae-6054-4813-8e54-1f57b74e536a\\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.

Processes:

flow ioc

3 api.2ip.ua
4 api.2ip.ua
9 api.2ip.ua
Suspicious use of SetThreadContext 2 IoCs

Processes:

file.exefile.exe

description pid process target process

PID 1584 set thread context of 3044 1584 file.exe file.exe
PID 2504 set thread context of 1956 2504 file.exe file.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

file.exefile.exe

pid process

3044 file.exe
1956 file.exe

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

description	pid	process	target process
PID 1584 set thread context of 3044	1584	file.exe	file.exe
PID 2504 set thread context of 1956	2504	file.exe	file.exe

pid	process
3044	file.exe
1956	file.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

file.exefile.exefile.exe

description	pid	process	target process
PID 1584 wrote to memory of 3044	1584	file.exe	file.exe
PID 1584 wrote to memory of 3044	1584	file.exe	file.exe
PID 1584 wrote to memory of 3044	1584	file.exe	file.exe
PID 1584 wrote to memory of 3044	1584	file.exe	file.exe
PID 1584 wrote to memory of 3044	1584	file.exe	file.exe
PID 1584 wrote to memory of 3044	1584	file.exe	file.exe
PID 1584 wrote to memory of 3044	1584	file.exe	file.exe
PID 1584 wrote to memory of 3044	1584	file.exe	file.exe
PID 1584 wrote to memory of 3044	1584	file.exe	file.exe
PID 1584 wrote to memory of 3044	1584	file.exe	file.exe
PID 1584 wrote to memory of 3044	1584	file.exe	file.exe
PID 3044 wrote to memory of 1624	3044	file.exe	icacls.exe
PID 3044 wrote to memory of 1624	3044	file.exe	icacls.exe
PID 3044 wrote to memory of 1624	3044	file.exe	icacls.exe
PID 3044 wrote to memory of 1624	3044	file.exe	icacls.exe
PID 3044 wrote to memory of 2504	3044	file.exe	file.exe
PID 3044 wrote to memory of 2504	3044	file.exe	file.exe
PID 3044 wrote to memory of 2504	3044	file.exe	file.exe
PID 3044 wrote to memory of 2504	3044	file.exe	file.exe
PID 2504 wrote to memory of 1956	2504	file.exe	file.exe
PID 2504 wrote to memory of 1956	2504	file.exe	file.exe
PID 2504 wrote to memory of 1956	2504	file.exe	file.exe
PID 2504 wrote to memory of 1956	2504	file.exe	file.exe
PID 2504 wrote to memory of 1956	2504	file.exe	file.exe
PID 2504 wrote to memory of 1956	2504	file.exe	file.exe
PID 2504 wrote to memory of 1956	2504	file.exe	file.exe
PID 2504 wrote to memory of 1956	2504	file.exe	file.exe
PID 2504 wrote to memory of 1956	2504	file.exe	file.exe
PID 2504 wrote to memory of 1956	2504	file.exe	file.exe
PID 2504 wrote to memory of 1956	2504	file.exe	file.exe

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:1584

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3044

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\a572a7ae-6054-4813-8e54-1f57b74e536a" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:1624

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:2504

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Suspicious behavior: EnumeratesProcesses
PID:1956

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
f21f41f56a4ea8d99b07eb0cb5b95fe9

SHA1
587d2a31834e4ab3dff7a32aa5f2713ebd22553e

SHA256
6b719bfb51caaf4ff29c7ee894028bdebe5d378e75866f9b125ddb3ed837ba97

SHA512
d757ca313860c9b00a7999d77658dcb14de2edcf265fac2af75ac819e3b796c3b5c461f88dc3a7f6d0f67119bb4b08d36058b722dab54e699ef7eaf765977ac7

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

MD5
538f8aeb1a5e87f8c3ffe36470d17ccf

SHA1
ae72ac52fdf744c91c5b3439eca3711f18c0a27f

SHA256
a8a302e39356dff39d7024381e43512ce80e1311cfa520d61c040b993e6785b8

SHA512
6aef35106a7f3fafeb8fb5482af868a6ce80d588d762354df2adda8abe77abd4008f6845a7a4d472b436011745d8940843ccbed0a82e68da2ee091bcfec11ae5

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

MD5
b0a07072f8b0b618234387171ecb6a94

SHA1
1d67e019854e09e073436400688fcba2c34a2c8a

SHA256
ebfe00e38866fe8bbe7cc8015d57559277957f5a112a0503f3073202ecadb132

SHA512
02359811675235598e5e52a5cf1288669255fb3ffdfae786793f3547b360d7ffb7fddd318d6e1f62c2fd09ce696bf7866962671234eb00f199c3f46c8da49783

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cab60C6.tmp
Filesize
65KB

MD5
ac05d27423a85adc1622c714f2cb6184

SHA1
b0fe2b1abddb97837ea0195be70ab2ff14d43198

SHA256
c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

SHA512
6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

Download Submit
C:\Users\Admin\AppData\Local\a572a7ae-6054-4813-8e54-1f57b74e536a\file.exe
Filesize
824KB

MD5
9b3e38e023020228484dcc008d6f6e52

SHA1
16a218483c71a8edeb7c43a9ff3696e53c586ef2

SHA256
567ed29376b1cdfc820544d6d8e38d58187476a0b911226d5cb8e95f69dcba6f

SHA512
0f46c3509890560a4c753efb5d6b940b545a2619b277c536fae8cb2dab280def9afd61b7d7d7e0ab08a879dcf2288705e92a3066b37da1a1c2b0e0ca64e98399

Download Submit
memory/1584-0-0x00000000004E0000-0x0000000000572000-memory.dmp

Filesize
584KB

Download
memory/1584-6-0x0000000001EF0000-0x000000000200B000-memory.dmp

Filesize
1.1MB

Download
memory/1584-5-0x00000000004E0000-0x0000000000572000-memory.dmp

Filesize
584KB

Download
memory/1956-38-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1956-57-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1956-39-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1956-63-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1956-62-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1956-61-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1956-59-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1956-55-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1956-56-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1956-54-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2504-32-0x0000000000400000-0x00000000004DE000-memory.dmp

Filesize
888KB

Download
memory/2504-36-0x0000000000400000-0x00000000004DE000-memory.dmp

Filesize
888KB

Download
memory/2504-31-0x0000000000220000-0x00000000002B2000-memory.dmp

Filesize
584KB

Download
memory/3044-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3044-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3044-7-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3044-8-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3044-1-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download