djvu | fc033161f27b2a779ed33cd69173d269b141414ad57ea833fbe2e02f2503540d

Analysis

max time kernel
161s
max time network
138s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
05-01-2024 12:40

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General

Target

file.exe
Size

780KB
MD5

ee4df7e66fae1dd2dd4184a582efe89b
SHA1

af24b93484d5cc961dd9fa2c6da0229e92340386
SHA256

fc033161f27b2a779ed33cd69173d269b141414ad57ea833fbe2e02f2503540d
SHA512

5b4521cbe88f09d8a385608d88ea8e6704a9f62c63bb228352d37870282e76a4e2d4592df32dd64d1e15f9e038fdf1fe392c97ba3b2e185d96a06931e95ec460
SSDEEP

24576:0WnBJHfIqAaLA5/1m6sqB1V6DFvcNmAbJ:rJ/GF5/7XuvcNmeJ

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.cdmx
offline_id
mMsRxMUuXypapZbGOAfxD9pczHmW8zVRP7Pgjwt1
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://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: 0841ASdw

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral1/memory/1276-3-0x0000000001D00000-0x0000000001E1B000-memory.dmp	family_djvu
behavioral1/memory/2076-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2076-7-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2076-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2076-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/268-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/268-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/268-50-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/268-48-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/268-49-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/268-55-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/268-57-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/268-58-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/268-59-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/268-60-0x0000000000400000-0x0000000000537000-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
2616	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-1-5-21-2444714103-3190537498-3629098939-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\d105bfc1-3350-4956-bdcf-39e5b02a335b\\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
9	api.2ip.ua
3	api.2ip.ua
4	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1276 set thread context of 2076	1276	file.exe	28
PID 1896 set thread context of 268	1896	file.exe	35

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2076	file.exe
2076	file.exe
268	file.exe
268	file.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1276 wrote to memory of 2076	1276	file.exe	28
PID 1276 wrote to memory of 2076	1276	file.exe	28
PID 1276 wrote to memory of 2076	1276	file.exe	28
PID 1276 wrote to memory of 2076	1276	file.exe	28
PID 1276 wrote to memory of 2076	1276	file.exe	28
PID 1276 wrote to memory of 2076	1276	file.exe	28
PID 1276 wrote to memory of 2076	1276	file.exe	28
PID 1276 wrote to memory of 2076	1276	file.exe	28
PID 1276 wrote to memory of 2076	1276	file.exe	28
PID 1276 wrote to memory of 2076	1276	file.exe	28
PID 1276 wrote to memory of 2076	1276	file.exe	28
PID 2076 wrote to memory of 2616	2076	file.exe	32
PID 2076 wrote to memory of 2616	2076	file.exe	32
PID 2076 wrote to memory of 2616	2076	file.exe	32
PID 2076 wrote to memory of 2616	2076	file.exe	32
PID 2076 wrote to memory of 1896	2076	file.exe	34
PID 2076 wrote to memory of 1896	2076	file.exe	34
PID 2076 wrote to memory of 1896	2076	file.exe	34
PID 2076 wrote to memory of 1896	2076	file.exe	34
PID 1896 wrote to memory of 268	1896	file.exe	35
PID 1896 wrote to memory of 268	1896	file.exe	35
PID 1896 wrote to memory of 268	1896	file.exe	35
PID 1896 wrote to memory of 268	1896	file.exe	35
PID 1896 wrote to memory of 268	1896	file.exe	35
PID 1896 wrote to memory of 268	1896	file.exe	35
PID 1896 wrote to memory of 268	1896	file.exe	35
PID 1896 wrote to memory of 268	1896	file.exe	35
PID 1896 wrote to memory of 268	1896	file.exe	35
PID 1896 wrote to memory of 268	1896	file.exe	35
PID 1896 wrote to memory of 268	1896	file.exe	35

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:1276
- 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:2076
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\d105bfc1-3350-4956-bdcf-39e5b02a335b" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2616
- - 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:1896
  - - C:\Users\Admin\AppData\Local\Temp\file.exe
      "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:268

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
407e1d6973bb0cc7b35e4aa3f9823bdc

SHA1
35b5fa84342c0f4d2f59d573658a2044ef61e0a7

SHA256
afd92c73833d8bb3c59131d20cae43af53c65c1b7afa29e9a2f49bcda72d076e

SHA512
22ac5fa9d2154c1aaafc4836b8917c257e3720cc1fea4b08cca320ee9e3358d8708abf5ba02ebabc994aa3ed34aa64d3b294192315f6785f217bcad4d8056a48

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
c5b35931b45363e6b7bef7e50167ede3

SHA1
541f37f514cd8af57ec52a3beaf24925ec3e73dd

SHA256
2662b7e222b1ca4af2b9972a70e1fe61b340696d8b9214bfeb1934d44ad7f98b

SHA512
f374f7f935fe6dee575e2dfd63b40acd93e5a56d29b6b5126acd0e442b6728ce5a6ffdf8bebcb0f19f267dc85e9d124bb3a28aa0df88ad47a7851afd0a0ae45c

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

Filesize
344B

MD5
14400469e11f08977413c84e4a2f7090

SHA1
44aa4cd7b245ce23498fdd8973ee8e73f1cd0729

SHA256
dd777f9707a0c135ed8919c20c36f931d1f307c1892de7a3278183e2127f91e6

SHA512
8f9c947c64f52b5b9882d03906731920e680a588dd486609bb529e4204b9d7e62780cfa39792814c09b33fbae668d254a950bb07e482f5e44a89f23a3529b1be

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

Filesize
392B

MD5
bafed95243cca99b6d7f79084b8397ff

SHA1
6c0703a507ec7adfb82ce813670c1c998a8a612f

SHA256
40cd5f87ff957ceb3f8b0c051bb5e0978ab061237c5e0b575b2419fef94b15ad

SHA512
dac7864950fa843515e4ef8f4f26cec69144eaac4e1e52c5135cb350db9423da43efe2d2f756a5ba5cf58ec6fe46cdf44caaceaa5206ebf19cb7ac11d6cf3036

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cab3E7.tmp

Filesize
65KB

MD5
ac05d27423a85adc1622c714f2cb6184

SHA1
b0fe2b1abddb97837ea0195be70ab2ff14d43198

SHA256
c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

SHA512
6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

Download Submit
C:\Users\Admin\AppData\Local\d105bfc1-3350-4956-bdcf-39e5b02a335b\file.exe

Filesize
780KB

MD5
ee4df7e66fae1dd2dd4184a582efe89b

SHA1
af24b93484d5cc961dd9fa2c6da0229e92340386

SHA256
fc033161f27b2a779ed33cd69173d269b141414ad57ea833fbe2e02f2503540d

SHA512
5b4521cbe88f09d8a385608d88ea8e6704a9f62c63bb228352d37870282e76a4e2d4592df32dd64d1e15f9e038fdf1fe392c97ba3b2e185d96a06931e95ec460

Download Submit
memory/268-58-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/268-55-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/268-49-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/268-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/268-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/268-57-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/268-48-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/268-59-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/268-60-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/268-50-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1276-0-0x0000000000220000-0x00000000002B1000-memory.dmp

Filesize
580KB

Download
memory/1276-3-0x0000000001D00000-0x0000000001E1B000-memory.dmp

Filesize
1.1MB

Download
memory/1276-1-0x0000000000220000-0x00000000002B1000-memory.dmp

Filesize
580KB

Download
memory/1896-28-0x0000000000330000-0x00000000003C1000-memory.dmp

Filesize
580KB

Download
memory/1896-30-0x0000000000330000-0x00000000003C1000-memory.dmp

Filesize
580KB

Download
memory/2076-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2076-8-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2076-7-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2076-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2076-2-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download