djvu | abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139

Analysis

max time kernel
142s
max time network
124s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
29-05-2024 15:39

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General

Target

abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
Size

791KB
MD5

7e757f9cbab5888783a4fd47505e1545
SHA1

0540526f08a8580dc4ef120b10fad767364af1b1
SHA256

abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139
SHA512

da8224fb54b2ff692aed76cd49e2c8bbb8a11ffca58bcf48606e1e8396948693f9107d619c97f019c4e0acd425ed35e3851948d2f41dd84fcb897741b60b6760
SSDEEP

12288:3np5gTpUK81TioQkv4BDrvcVenLNUjYbqtQDzrSP0gjsOit+02wj:3np5gTOX1Ti8wB3XnR1zesgriY02wj

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.vehu
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: 0872PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 16 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1668-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1668-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1668-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4548-4-0x0000000003D10000-0x0000000003E2B000-memory.dmp	family_djvu
behavioral1/memory/1668-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1668-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4764-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4764-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4764-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4764-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3180-33-0x0000000000400000-0x0000000002012000-memory.dmp	family_djvu
behavioral1/memory/4764-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4764-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4764-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4764-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4764-39-0x0000000000400000-0x0000000000537000-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

Processes:

abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-711569230-3659488422-571408806-1000\Control Panel\International\Geo\Nation	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe

Modifies file permissions 1 TTPs 1 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

icacls.exe

pid process

628 icacls.exe

pid	process
628	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-711569230-3659488422-571408806-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\75302315-9fd6-41f9-ad0c-ae9350921f99\\abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe\" --AutoStart"	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.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

15 api.2ip.ua
3 api.2ip.ua
4 api.2ip.ua

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

Suspicious use of SetThreadContext 2 IoCs

Processes:

abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exeabf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe

description	pid	process	target process
PID 4548 set thread context of 1668	4548	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
PID 3180 set thread context of 4764	3180	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exeabf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe

pid	process
1668	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
1668	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
4764	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
4764	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exeabf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exeabf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe

C:\Users\Admin\AppData\Local\Temp\abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
"C:\Users\Admin\AppData\Local\Temp\abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4548

C:\Users\Admin\AppData\Local\Temp\abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
"C:\Users\Admin\AppData\Local\Temp\abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe"
2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1668

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\75302315-9fd6-41f9-ad0c-ae9350921f99" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:628

C:\Users\Admin\AppData\Local\Temp\abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
"C:\Users\Admin\AppData\Local\Temp\abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3180

C:\Users\Admin\AppData\Local\Temp\abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
"C:\Users\Admin\AppData\Local\Temp\abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Suspicious behavior: EnumeratesProcesses
PID:4764

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize
1KB

MD5
6c93f60553415802769aea371043b2a5

SHA1
77d4fae422f2f5af9d6fbcfacf877a5a35a85d1c

SHA256
bfcb18fa2ee3598fdff75b1ecc932c926f011bff60edfa141c41976499c821c5

SHA512
ca99fb34beb68dd3e2169edc3c30f964702e209439b4f37b292d6f5e39e1361eeb3251201faf9aa4789db66c23e5d55043a4e9a37e2ea4f319d2cd2951ccd965

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
90c45dbb3ba174deb31da6147bb218e9

SHA1
ebb1498b4dc318f73254ad7bafe28c27c41c5d00

SHA256
e28233d2f83262db088f9930bdc2510425f87a177e4e84dc9161d50fa83cedec

SHA512
faf08603f1e72049a75814add11e5239d32e9b68e5abc0f074f43777d7d44770317a08b07550466450813401a5116aad44c8be4a912e943393eeaa061d82dcd1

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize
392B

MD5
e20fa8c6b7a01f4c9af0334dab90cf41

SHA1
4b2270bcb1b49792855b830d161563686a4c5b33

SHA256
7017945c7e9025d6852fa28f16e500c02aa2112cea4d8d4a8da307d8fc9ef7c0

SHA512
2054e32158cc20b78f4666a777c219bb3a7d3c53b3c8d038d90b5d7d4fe7a80d9092dc987d74599c6e14ba74c2892c9da48803b1cd5e70e5342b76e9a3583731

Download Submit
C:\Users\Admin\AppData\Local\75302315-9fd6-41f9-ad0c-ae9350921f99\abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
Filesize
791KB

MD5
7e757f9cbab5888783a4fd47505e1545

SHA1
0540526f08a8580dc4ef120b10fad767364af1b1

SHA256
abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139

SHA512
da8224fb54b2ff692aed76cd49e2c8bbb8a11ffca58bcf48606e1e8396948693f9107d619c97f019c4e0acd425ed35e3851948d2f41dd84fcb897741b60b6760

Download Submit
memory/1668-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1668-19-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1668-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1668-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1668-2-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3180-33-0x0000000000400000-0x0000000002012000-memory.dmp

Filesize
28.1MB

Download
memory/3180-23-0x0000000000400000-0x0000000002012000-memory.dmp

Filesize
28.1MB

Download
memory/4548-1-0x0000000002020000-0x00000000020BB000-memory.dmp

Filesize
620KB

Download
memory/4548-4-0x0000000003D10000-0x0000000003E2B000-memory.dmp

Filesize
1.1MB

Download
memory/4764-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4764-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4764-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4764-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4764-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4764-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4764-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4764-38-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4764-39-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

description	pid	process	target process
PID 4548 wrote to memory of 1668	4548	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
PID 4548 wrote to memory of 1668	4548	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
PID 4548 wrote to memory of 1668	4548	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
PID 4548 wrote to memory of 1668	4548	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
PID 4548 wrote to memory of 1668	4548	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
PID 4548 wrote to memory of 1668	4548	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
PID 4548 wrote to memory of 1668	4548	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
PID 4548 wrote to memory of 1668	4548	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
PID 4548 wrote to memory of 1668	4548	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
PID 4548 wrote to memory of 1668	4548	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
PID 1668 wrote to memory of 628	1668	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	icacls.exe
PID 1668 wrote to memory of 628	1668	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	icacls.exe
PID 1668 wrote to memory of 628	1668	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	icacls.exe
PID 1668 wrote to memory of 3180	1668	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
PID 1668 wrote to memory of 3180	1668	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
PID 1668 wrote to memory of 3180	1668	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
PID 3180 wrote to memory of 4764	3180	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
PID 3180 wrote to memory of 4764	3180	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
PID 3180 wrote to memory of 4764	3180	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
PID 3180 wrote to memory of 4764	3180	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
PID 3180 wrote to memory of 4764	3180	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
PID 3180 wrote to memory of 4764	3180	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
PID 3180 wrote to memory of 4764	3180	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
PID 3180 wrote to memory of 4764	3180	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
PID 3180 wrote to memory of 4764	3180	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
PID 3180 wrote to memory of 4764	3180	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe	abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe