djvu | d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f

Analysis

max time kernel
220s
max time network
262s
platform
windows7_x64
resource
win7-20230831-en
resource tags

arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
submitted
12/10/2023, 06:04

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General

Target

d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe
Size

802KB
MD5

4978b3a7e5060709617a7780552c04b3
SHA1

3eaecc7949657efa802a53f0f30cbf6b62a8a8a0
SHA256

d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f
SHA512

fb310bddeee8aecc4c88f3ff7a324c62958255f19e9e164780ee62712b49cff46d4aadcf7cc44420d90fd1a276448bba874a347447596505ee30721f5acc15b0
SSDEEP

12288:EHnQ2xCCrYfbujJJG+KBmNrppexQobS92C4F1XQw4trSgBuFfvj9s8:KQqraKqO/peBRArSg4fv5s8

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.wwpl
offline_id
LtYnlJvK0hICyOCeum6Tv4pbia9jcIGHVgA3Xht1
payload_url
http://colisumy.com/dl/build2.exe

http://zexeq.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. You can get and look video overview decrypt tool: https://we.tl/t-xoUXGr6cqT 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: 0786JOsie

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 9 IoCs

resource	yara_rule
behavioral1/memory/2816-2-0x0000000002160000-0x000000000227B000-memory.dmp	family_djvu
behavioral1/memory/2540-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2540-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2540-9-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2540-10-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2540-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2540-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2732-48-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2732-49-0x0000000000400000-0x0000000000537000-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
2856	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-1-5-21-3750544865-3773649541-1858556521-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\b34bb98b-117f-4fe2-9632-1b2bd0b64f90\\d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe\" --AutoStart"	d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.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
11	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2816 set thread context of 2540	2816	d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe	29
PID 2040 set thread context of 2732	2040	d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe	34

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2540	d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe
2540	d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe
2732	d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2816 wrote to memory of 2540	2816	d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe	29
PID 2816 wrote to memory of 2540	2816	d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe	29
PID 2816 wrote to memory of 2540	2816	d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe	29
PID 2816 wrote to memory of 2540	2816	d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe	29
PID 2816 wrote to memory of 2540	2816	d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe	29
PID 2816 wrote to memory of 2540	2816	d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe	29
PID 2816 wrote to memory of 2540	2816	d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe	29
PID 2816 wrote to memory of 2540	2816	d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe	29
PID 2816 wrote to memory of 2540	2816	d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe	29
PID 2816 wrote to memory of 2540	2816	d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe	29
PID 2816 wrote to memory of 2540	2816	d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe	29
PID 2540 wrote to memory of 2856	2540	d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe	31
PID 2540 wrote to memory of 2856	2540	d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe	31
PID 2540 wrote to memory of 2856	2540	d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe	31
PID 2540 wrote to memory of 2856	2540	d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe	31
PID 2540 wrote to memory of 2040	2540	d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe	33
PID 2540 wrote to memory of 2040	2540	d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe	33
PID 2540 wrote to memory of 2040	2540	d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe	33
PID 2540 wrote to memory of 2040	2540	d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe	33
PID 2040 wrote to memory of 2732	2040	d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe	34
PID 2040 wrote to memory of 2732	2040	d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe	34
PID 2040 wrote to memory of 2732	2040	d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe	34
PID 2040 wrote to memory of 2732	2040	d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe	34
PID 2040 wrote to memory of 2732	2040	d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe	34
PID 2040 wrote to memory of 2732	2040	d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe	34
PID 2040 wrote to memory of 2732	2040	d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe	34
PID 2040 wrote to memory of 2732	2040	d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe	34
PID 2040 wrote to memory of 2732	2040	d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe	34
PID 2040 wrote to memory of 2732	2040	d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe	34
PID 2040 wrote to memory of 2732	2040	d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe	34

C:\Users\Admin\AppData\Local\Temp\d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe
"C:\Users\Admin\AppData\Local\Temp\d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2816
- C:\Users\Admin\AppData\Local\Temp\d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe
  "C:\Users\Admin\AppData\Local\Temp\d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2540
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\b34bb98b-117f-4fe2-9632-1b2bd0b64f90" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2856
- - C:\Users\Admin\AppData\Local\Temp\d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe
    "C:\Users\Admin\AppData\Local\Temp\d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2040
  - - C:\Users\Admin\AppData\Local\Temp\d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe
      "C:\Users\Admin\AppData\Local\Temp\d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2732

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
626a47470c00b770b9eb49e177507f5b

SHA1
4c56ed49fb7e7a3aaf3b55276a2686f8cea2c94e

SHA256
29e5f0aabc7bf3e670d13aed8ea720f56b291112105ac7942c10c5c1448af1e4

SHA512
782049ad82f04da3b521f7de10d493b77032a9e16419d380ad87207394892bcf6ba4a0e873a30a5af89f467aa0e513a2d45e1eefff362d2b2af7954ffa8b9ea5

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
ae10329ae6ce8cb19b283dc5380276e0

SHA1
2a6e1aa3aa1ddbda3bac422724283e7ce684bd36

SHA256
416831fcb6261579a253d236925a60ee3a8a2138f50528aab2710ac6a65110cf

SHA512
5203b617054355fb98c14ed8f913a2a9839617ce44ee6e7d739800f3a9661763846a85341e1df70cecabc4e58fbc151e3812cd9184699be794cd1fc41507f224

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

Filesize
344B

MD5
f018b56fb571e07d82255baf0d92238e

SHA1
e7b9629febc84e23f02bcb2ba7aa45472da908c7

SHA256
fe8164522b379ef790d49b227d18f060113ab5affc69dc1aa455aa1b1d4096c9

SHA512
8fe77949bc08aa6a11b14201ce997b76b0d064f6628024338e4e20c3fbde320d8c069b31f2c1acfc0ff9805d8546619b9530bbb930a9616b7f1e63be1171e9e8

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

Filesize
392B

MD5
eb9a5ee6fa26e5a9aa0fdb3744141723

SHA1
81c927a17c7f854190eb42ee150ac7293e195fe6

SHA256
47c6f811d84c2a6c1f9e819f56bc125274afe7590ae2767689a177880f516c1b

SHA512
a52776b69dbc75d4262d6773ad206f27566ef6d6c9fe125ea1a65a080e891b4e8cd66ef73000461e51ad28624b24def5cf59c8207132d052b2a0b953fbd6d9ef

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cab140D.tmp

Filesize
61KB

MD5
f3441b8572aae8801c04f3060b550443

SHA1
4ef0a35436125d6821831ef36c28ffaf196cda15

SHA256
6720349e7d82ee0a8e73920d3c2b7cb2912d9fcf2edb6fd98f2f12820158b0bf

SHA512
5ba01ba421b50030e380ae6bbcd2f681f2a91947fe7fedb3c8e6b5f24dce9517abf57b1cf26cc6078d4bb53bde6fcfb2561591337c841f8f2cb121a3d71661b9

Download Submit
C:\Users\Admin\AppData\Local\b34bb98b-117f-4fe2-9632-1b2bd0b64f90\d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f.exe

Filesize
802KB

MD5
4978b3a7e5060709617a7780552c04b3

SHA1
3eaecc7949657efa802a53f0f30cbf6b62a8a8a0

SHA256
d5b3575eaa5e6f4e964ceb0d0208d7fb1e45eea151d4ad8451b9fd85a312ec4f

SHA512
fb310bddeee8aecc4c88f3ff7a324c62958255f19e9e164780ee62712b49cff46d4aadcf7cc44420d90fd1a276448bba874a347447596505ee30721f5acc15b0

Download Submit
memory/2040-43-0x00000000002D0000-0x0000000000362000-memory.dmp

Filesize
584KB

Download
memory/2040-40-0x00000000002D0000-0x0000000000362000-memory.dmp

Filesize
584KB

Download
memory/2540-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2540-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2540-39-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2540-10-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2540-9-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2540-8-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2540-3-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2732-49-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2732-48-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2816-0-0x0000000000360000-0x00000000003F2000-memory.dmp

Filesize
584KB

Download
memory/2816-7-0x0000000000360000-0x00000000003F2000-memory.dmp

Filesize
584KB

Download
memory/2816-2-0x0000000002160000-0x000000000227B000-memory.dmp

Filesize
1.1MB

Download
memory/2816-1-0x0000000000360000-0x00000000003F2000-memory.dmp

Filesize
584KB

Download