djvu | 54e86caeee3b5324a55b98b2855f56dfcd4624681e5d2f0cb58558be8e40e896

Analysis

max time kernel
146s
max time network
124s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
17-04-2024 14:52

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General

Target

26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe
Size

684KB
MD5

d3d46d0339ceb24c85568e75f78846a7
SHA1

36f63066beba540453e1b93e6b1e282aed804234
SHA256

26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7
SHA512

d669aaafddb658f88dd6d325883d7b568b9e6b6dc5914b0d7d9d01cf468f0e0521e05e5a7f46e0437e9389470f4f5ec751b416b94412956c2a208b0bccc8227c
SSDEEP

12288:vE1Gh9OfPNkHH1fl8Zjc38izOfdXacgGeOM0GejX6B:qM9ZZl4mGXjxeOMg4

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.cdqw
offline_id
mMsRxMUuXypapZbGOAfxD9pczHmW8zVRP7Pgjwt1
payload_url
http://brusuax.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-99MNqXMrdS Price of private key and decrypt software is $1999. Discount 50% available if you contact us first 72 hours, that's price for you is $999. 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: 0840ASdw

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 16 IoCs

resource	yara_rule
behavioral1/memory/1548-2-0x0000000002230000-0x000000000234B000-memory.dmp	family_djvu
behavioral1/memory/2604-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2604-7-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2604-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2604-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2592-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2592-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2592-49-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2592-48-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2592-53-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2592-57-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2592-64-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2592-65-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2592-67-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2592-68-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2592-69-0x0000000000400000-0x0000000000537000-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
2580	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-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\b551de82-44b8-429b-8767-33e907f28d47\\26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe\" --AutoStart"	26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.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 1548 set thread context of 2604	1548	26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe	28
PID 2728 set thread context of 2592	2728	26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.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
2604	26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe
2592	26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1548 wrote to memory of 2604	1548	26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe	28
PID 1548 wrote to memory of 2604	1548	26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe	28
PID 1548 wrote to memory of 2604	1548	26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe	28
PID 1548 wrote to memory of 2604	1548	26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe	28
PID 1548 wrote to memory of 2604	1548	26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe	28
PID 1548 wrote to memory of 2604	1548	26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe	28
PID 1548 wrote to memory of 2604	1548	26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe	28
PID 1548 wrote to memory of 2604	1548	26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe	28
PID 1548 wrote to memory of 2604	1548	26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe	28
PID 1548 wrote to memory of 2604	1548	26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe	28
PID 1548 wrote to memory of 2604	1548	26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe	28
PID 2604 wrote to memory of 2580	2604	26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe	29
PID 2604 wrote to memory of 2580	2604	26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe	29
PID 2604 wrote to memory of 2580	2604	26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe	29
PID 2604 wrote to memory of 2580	2604	26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe	29
PID 2604 wrote to memory of 2728	2604	26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe	30
PID 2604 wrote to memory of 2728	2604	26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe	30
PID 2604 wrote to memory of 2728	2604	26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe	30
PID 2604 wrote to memory of 2728	2604	26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe	30
PID 2728 wrote to memory of 2592	2728	26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe	31
PID 2728 wrote to memory of 2592	2728	26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe	31
PID 2728 wrote to memory of 2592	2728	26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe	31
PID 2728 wrote to memory of 2592	2728	26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe	31
PID 2728 wrote to memory of 2592	2728	26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe	31
PID 2728 wrote to memory of 2592	2728	26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe	31
PID 2728 wrote to memory of 2592	2728	26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe	31
PID 2728 wrote to memory of 2592	2728	26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe	31
PID 2728 wrote to memory of 2592	2728	26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe	31
PID 2728 wrote to memory of 2592	2728	26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe	31
PID 2728 wrote to memory of 2592	2728	26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe	31

C:\Users\Admin\AppData\Local\Temp\26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe
"C:\Users\Admin\AppData\Local\Temp\26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1548
- C:\Users\Admin\AppData\Local\Temp\26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe
  "C:\Users\Admin\AppData\Local\Temp\26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2604
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\b551de82-44b8-429b-8767-33e907f28d47" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2580
- - C:\Users\Admin\AppData\Local\Temp\26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe
    "C:\Users\Admin\AppData\Local\Temp\26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2728
  - - C:\Users\Admin\AppData\Local\Temp\26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe
      "C:\Users\Admin\AppData\Local\Temp\26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2592

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

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Downloads

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

Filesize
1KB

MD5
896dc4f56c1b7ce86308a438e1eb5384

SHA1
edb5c0ee5aba86a7622d59aa3db7ff3abef929f9

SHA256
9bd599b72ac9d6f5ad1da7982d2a847f52f01c8922bb0d1b27371b11dedf4c3a

SHA512
81728dfb7eccf691ccc4b556d0f61d4af1d0f7696009a03deb46502f843e9bd15b6cc41d50cdba0ea0c26891f0eaffa8a9ff33e8a35ade02c0f51037c7b4e549

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
dda949c88901d5ec645bec805530aaf2

SHA1
9285fe12d7c4c41a356415b91cd9e26de354d4e7

SHA256
85e69f68db5e4303e4f6ad94bc7f10ee0096bd1198574dc966ba252a3adb36d2

SHA512
88e658a42eb06022fce8cc20958426fdc63bb77e8c9e71b081ac7ceb81e0111252a702df41bb29b637f496ace1fd380c6317783bdb911f28399409118b078876

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

Filesize
344B

MD5
72d13700e47faff1bd35ef90952ff426

SHA1
76f7ea7d58976c83a491c13a003273d54cd18848

SHA256
8cbbb403914148adbbf3634a03b1ae05a5c43439d3d8f3d059e0f84403eb97d3

SHA512
53ef4add81e237920eaefff8e0c51c2474312ccbaa30b379e60d3ae1a396f9eb276152003215a488a24da0328d793849a60bcce276ad7eb32cce80ddb9f8ede7

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

Filesize
392B

MD5
298f31cc034ea9305015af2bea8c97c0

SHA1
6450ae48964f64a8af166094d6794a1cdc208483

SHA256
d79299e89804fc7328df9880fbfd3629e823666ab2758e5c66bb906e37820344

SHA512
104030563a47085861be980031f0ef3ea51b705e086f7b6916ffaa423c17bc1f365a92d8eabee5bb4f00d2e75b9d9ad5a3c8571a1aef49d225db8a9e2aec4bc6

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cab950F.tmp

Filesize
65KB

MD5
ac05d27423a85adc1622c714f2cb6184

SHA1
b0fe2b1abddb97837ea0195be70ab2ff14d43198

SHA256
c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

SHA512
6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

Download Submit
C:\Users\Admin\AppData\Local\b551de82-44b8-429b-8767-33e907f28d47\26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7.exe

Filesize
684KB

MD5
d3d46d0339ceb24c85568e75f78846a7

SHA1
36f63066beba540453e1b93e6b1e282aed804234

SHA256
26bd4a40d12d5483b5cf8a0a2db0dddb151b0b3206079dcf2782834482a2c3b7

SHA512
d669aaafddb658f88dd6d325883d7b568b9e6b6dc5914b0d7d9d01cf468f0e0521e05e5a7f46e0437e9389470f4f5ec751b416b94412956c2a208b0bccc8227c

Download Submit
memory/1548-2-0x0000000002230000-0x000000000234B000-memory.dmp

Filesize
1.1MB

Download
memory/1548-0-0x00000000002C0000-0x0000000000351000-memory.dmp

Filesize
580KB

Download
memory/1548-1-0x00000000002C0000-0x0000000000351000-memory.dmp

Filesize
580KB

Download
memory/2592-57-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2592-64-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2592-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2592-69-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2592-68-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2592-67-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2592-65-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2592-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2592-53-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2592-49-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2592-48-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2604-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2604-3-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2604-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2604-7-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2604-8-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2728-28-0x0000000000220000-0x00000000002B1000-memory.dmp

Filesize
580KB

Download
memory/2728-29-0x0000000000220000-0x00000000002B1000-memory.dmp

Filesize
580KB

Download