djvu | a706c1d0d748f3847de78ea63f7b3b6a6336f5750c84241e6b7fd0d45cd43765

Resubmissions

06/11/2023, 12:32

231106-pqk42sba4s 10

06/11/2023, 12:23

231106-pksxpsce94 10

03/11/2023, 20:59

231103-zsp6wscd45 10

Analysis

max time kernel
208s
max time network
157s
platform
windows7_x64
resource
win7-20231025-en
resource tags

arch:x64arch:x86image:win7-20231025-enlocale:en-usos:windows7-x64system
submitted
06/11/2023, 12:23

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General

Target

file.exe
Size

758KB
MD5

147f66a4ab5d877e9cd347e9c16fcd72
SHA1

37e9024c5d64d51d01a1b1c9b3f1b5758693cedb
SHA256

a706c1d0d748f3847de78ea63f7b3b6a6336f5750c84241e6b7fd0d45cd43765
SHA512

20ccb69ce1ced51fec5b87abfaa7418321700e28c2e8f23251564276662ba000479ea6d387f66e45325bae79fec078f5664b3ba925f90f1041213a097c783357
SSDEEP

12288:uA8auX4Zp7MC2bkWKvkfsIvkjAvh1rJyjvQe4XcIVvfdquBAsbDG:uZXcV7kkkfsI2qXF8vQe4XcILAs+

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.yzqe
offline_id
x2zqmFxw8ydx3wkiEeNayQ64Eyg2U5MS31sTegt1
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. You can get and look video overview decrypt tool: https://go.wetransfer.com/t-Z4jZBpJ1EK 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: 0819ASdw

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 13 IoCs

resource	yara_rule
behavioral1/memory/2936-2-0x0000000002100000-0x000000000221B000-memory.dmp	family_djvu
behavioral1/memory/2996-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2996-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2996-9-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2996-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2892-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2892-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2892-49-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2892-51-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2892-55-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2892-57-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2892-58-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2892-59-0x0000000000400000-0x0000000000537000-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
2640	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-1-5-21-1861898231-3446828954-4278112889-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\ec71ea04-f5cc-4333-a5be-38d374f6ef37\\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.

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 2936 set thread context of 2996	2936	file.exe	28
PID 2904 set thread context of 2892	2904	file.exe	31

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2996	file.exe
2892	file.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2936 wrote to memory of 2996	2936	file.exe	28
PID 2936 wrote to memory of 2996	2936	file.exe	28
PID 2936 wrote to memory of 2996	2936	file.exe	28
PID 2936 wrote to memory of 2996	2936	file.exe	28
PID 2936 wrote to memory of 2996	2936	file.exe	28
PID 2936 wrote to memory of 2996	2936	file.exe	28
PID 2936 wrote to memory of 2996	2936	file.exe	28
PID 2936 wrote to memory of 2996	2936	file.exe	28
PID 2936 wrote to memory of 2996	2936	file.exe	28
PID 2936 wrote to memory of 2996	2936	file.exe	28
PID 2936 wrote to memory of 2996	2936	file.exe	28
PID 2996 wrote to memory of 2640	2996	file.exe	29
PID 2996 wrote to memory of 2640	2996	file.exe	29
PID 2996 wrote to memory of 2640	2996	file.exe	29
PID 2996 wrote to memory of 2640	2996	file.exe	29
PID 2996 wrote to memory of 2904	2996	file.exe	30
PID 2996 wrote to memory of 2904	2996	file.exe	30
PID 2996 wrote to memory of 2904	2996	file.exe	30
PID 2996 wrote to memory of 2904	2996	file.exe	30
PID 2904 wrote to memory of 2892	2904	file.exe	31
PID 2904 wrote to memory of 2892	2904	file.exe	31
PID 2904 wrote to memory of 2892	2904	file.exe	31
PID 2904 wrote to memory of 2892	2904	file.exe	31
PID 2904 wrote to memory of 2892	2904	file.exe	31
PID 2904 wrote to memory of 2892	2904	file.exe	31
PID 2904 wrote to memory of 2892	2904	file.exe	31
PID 2904 wrote to memory of 2892	2904	file.exe	31
PID 2904 wrote to memory of 2892	2904	file.exe	31
PID 2904 wrote to memory of 2892	2904	file.exe	31
PID 2904 wrote to memory of 2892	2904	file.exe	31

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:2936
- 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:2996
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\ec71ea04-f5cc-4333-a5be-38d374f6ef37" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2640
- - 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:2904
  - - C:\Users\Admin\AppData\Local\Temp\file.exe
      "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2892

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

Loading Replay Monitor...

Downloads

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

Filesize
1KB

MD5
106b4bedd869d97baa93b696d064f882

SHA1
c52f044ee074ad5bb66eafb848b2ae7c133cbd2e

SHA256
5e793cb9dc61fe524fb971cd0c8dca4bc226cf0e9618ec3360a2bb7285f81a99

SHA512
f0b3aaaa71f2786f5144d464af5846f0411743c4228a6c68ce13b13c5a1c05b2c3c37d62007eba08541fb5fe950943800bdce7077d21c21eac330654c8b50a60

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
6f41da95deef4bd858dc63fb93456d5f

SHA1
1149022e360ae2ffb361fc8cf7c5557c1ca450a5

SHA256
65807f218e98fb826c1a17177c6822252abfdee51b6af8746d0f80a87b9dddcf

SHA512
20df89a58960c8317b6f0c9de2c2d8a61a151b326ba63a847f61be45ca3d4f4231dcca852e7bf15fb29dc80c3bc04efc804f8520a83ea8337a91930c825c0227

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

Filesize
344B

MD5
2bc2c95bacaf070cb089a70318a2a1a6

SHA1
ec67fabab21eef8e1e82d60fae944c9ba99b68e8

SHA256
12d49c9b5897c61550c3128a89cc94835319f37d4a750738bc1860f11e028ea0

SHA512
8808e923104493ba301fa84c40d72600619b1b6c3613d3c2d0c6cf90f416d6eed09f13110da1d63b05e043b756d0764bca265136ba5f723d9cbd099e30aca5c6

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

Filesize
392B

MD5
cc48b477d8d3fd6305b07dd0abde9ee8

SHA1
32d44898a8ed68be7c8dc1c5ae17b266d746af12

SHA256
f113031ff0cd3392688d78268d0104211375be49e73aafe87e2c007eaac336fe

SHA512
beef6e729c82ded73fefd5900b99fc3aa92e6e68be02ec4f6357462b637cd626a00f2d7550248e33a3a7606f18e5de3335558a743252f5e1c678ba3e91d35edb

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cab5DC9.tmp

Filesize
61KB

MD5
f3441b8572aae8801c04f3060b550443

SHA1
4ef0a35436125d6821831ef36c28ffaf196cda15

SHA256
6720349e7d82ee0a8e73920d3c2b7cb2912d9fcf2edb6fd98f2f12820158b0bf

SHA512
5ba01ba421b50030e380ae6bbcd2f681f2a91947fe7fedb3c8e6b5f24dce9517abf57b1cf26cc6078d4bb53bde6fcfb2561591337c841f8f2cb121a3d71661b9

Download Submit
C:\Users\Admin\AppData\Local\ec71ea04-f5cc-4333-a5be-38d374f6ef37\file.exe

Filesize
758KB

MD5
147f66a4ab5d877e9cd347e9c16fcd72

SHA1
37e9024c5d64d51d01a1b1c9b3f1b5758693cedb

SHA256
a706c1d0d748f3847de78ea63f7b3b6a6336f5750c84241e6b7fd0d45cd43765

SHA512
20ccb69ce1ced51fec5b87abfaa7418321700e28c2e8f23251564276662ba000479ea6d387f66e45325bae79fec078f5664b3ba925f90f1041213a097c783357

Download Submit
memory/2892-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2892-49-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2892-59-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2892-58-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2892-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2892-57-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2892-55-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2892-51-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2904-28-0x0000000000220000-0x00000000002B2000-memory.dmp

Filesize
584KB

Download
memory/2904-30-0x0000000000220000-0x00000000002B2000-memory.dmp

Filesize
584KB

Download
memory/2936-0-0x00000000002A0000-0x0000000000332000-memory.dmp

Filesize
584KB

Download
memory/2936-2-0x0000000002100000-0x000000000221B000-memory.dmp

Filesize
1.1MB

Download
memory/2936-1-0x00000000002A0000-0x0000000000332000-memory.dmp

Filesize
584KB

Download
memory/2936-7-0x00000000002A0000-0x0000000000332000-memory.dmp

Filesize
584KB

Download
memory/2996-3-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2996-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2996-8-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2996-9-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2996-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download