djvu | 2a707ff6a4840639e838d39cc367333bb92da01d39642002c1d26e26889df119

Analysis

max time kernel
144s
max time network
122s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
06/01/2024, 13:26

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General

Target

file.exe
Size

703KB
MD5

4ab7f99ee2a21823a94f2faaab068c7b
SHA1

d7c7a4ebb1dc15a5889c9160334e197fc6362e35
SHA256

2a707ff6a4840639e838d39cc367333bb92da01d39642002c1d26e26889df119
SHA512

bbeaae0fad7e03f88cd669f3dc86529bfba1c24fccd76aa75bf2a5572b49db2fe058b3defaebad411d684af0aab649b25e909df5f46846e7c4dbeb393a2534b7
SSDEEP

12288:pTuV8st8gmcSo/Wu/Ue1EBYiub+09RkNAqiCEf2stmM:AVLt5bS+LUe+Y/9RIXKht

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.cdaz
offline_id
dSwr1XNNi5cIitB5eDPbMANcusB1dWGDB8ToUnt1
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-e21iz7dS58 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: 0843ASdw

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 13 IoCs

resource	yara_rule
behavioral1/memory/1644-3-0x00000000008E0000-0x00000000009FB000-memory.dmp	family_djvu
behavioral1/memory/1592-7-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1592-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1592-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1592-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2708-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2708-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2708-49-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2708-48-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2708-54-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2708-56-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2708-57-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2708-58-0x0000000000400000-0x0000000000537000-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
2896	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-1-5-21-3601492379-692465709-652514833-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\2fdc20fd-8f22-45a0-8723-3ebaaae62a1c\\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 1644 set thread context of 1592	1644	file.exe	28
PID 2756 set thread context of 2708	2756	file.exe	32

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
1592	file.exe
2708	file.exe
2708	file.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1644 wrote to memory of 1592	1644	file.exe	28
PID 1644 wrote to memory of 1592	1644	file.exe	28
PID 1644 wrote to memory of 1592	1644	file.exe	28
PID 1644 wrote to memory of 1592	1644	file.exe	28
PID 1644 wrote to memory of 1592	1644	file.exe	28
PID 1644 wrote to memory of 1592	1644	file.exe	28
PID 1644 wrote to memory of 1592	1644	file.exe	28
PID 1644 wrote to memory of 1592	1644	file.exe	28
PID 1644 wrote to memory of 1592	1644	file.exe	28
PID 1644 wrote to memory of 1592	1644	file.exe	28
PID 1644 wrote to memory of 1592	1644	file.exe	28
PID 1592 wrote to memory of 2896	1592	file.exe	30
PID 1592 wrote to memory of 2896	1592	file.exe	30
PID 1592 wrote to memory of 2896	1592	file.exe	30
PID 1592 wrote to memory of 2896	1592	file.exe	30
PID 1592 wrote to memory of 2756	1592	file.exe	31
PID 1592 wrote to memory of 2756	1592	file.exe	31
PID 1592 wrote to memory of 2756	1592	file.exe	31
PID 1592 wrote to memory of 2756	1592	file.exe	31
PID 2756 wrote to memory of 2708	2756	file.exe	32
PID 2756 wrote to memory of 2708	2756	file.exe	32
PID 2756 wrote to memory of 2708	2756	file.exe	32
PID 2756 wrote to memory of 2708	2756	file.exe	32
PID 2756 wrote to memory of 2708	2756	file.exe	32
PID 2756 wrote to memory of 2708	2756	file.exe	32
PID 2756 wrote to memory of 2708	2756	file.exe	32
PID 2756 wrote to memory of 2708	2756	file.exe	32
PID 2756 wrote to memory of 2708	2756	file.exe	32
PID 2756 wrote to memory of 2708	2756	file.exe	32
PID 2756 wrote to memory of 2708	2756	file.exe	32

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:1644
- 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:1592
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\2fdc20fd-8f22-45a0-8723-3ebaaae62a1c" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2896
- - 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:2756
  - - C:\Users\Admin\AppData\Local\Temp\file.exe
      "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2708

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
8b3f66674e6838f15e010a3a85daa599

SHA1
58fc249721056bb240912535e042dc744c158aba

SHA256
c94853517feb843767fd405e5bb1a7e01b8e284e39072bf5fd8ff4e7cc47b8b9

SHA512
66f484aae25fd5aa9070652929a2d45c6106475f6bc94e16d49d2f1216d1b07923878205a5eb23afb5b662f527d6319dfbd9cea58d2fac13cd5d12dc141c822c

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
9300f089e89b5ea5dfc20ee9e60386a3

SHA1
413207f1704d91e0129e2abd7820d7b79f34e483

SHA256
20d1a3991cd46eef2d78c556cf4e6fe2fbd8fbb819a73b3c0c5c5ec43fdbe246

SHA512
71b17f13bae567a08a1af0abe177594c79f92157f8006894c952b22582b806ac4235a4ef980507197c5b038a78c34811f96c9c4555a81b50820ce8dfc520186e

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

Filesize
344B

MD5
581322e5eb8f52575b892334641b4e7a

SHA1
4fe450db8f0ef37241fef22b6a4ff723c386750c

SHA256
30620482f193551dc3251359e7628e93027ae6d213e82de529c133bcb196a551

SHA512
6726e1e561bf5f61c2fa59ff17322890a5fd2fe6609415bc2a0b48ef245ba72680da4480fb61d301cfd289796daf00702a480c3c649e89ead77876e7a3b4344f

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

Filesize
392B

MD5
23645c853e5462b5c380b1bfc12ed2c6

SHA1
b4ab641399107e0edf06fc169e03c06cb0554857

SHA256
d631d2ab7d3dded7f94fb8f956bd33bc87ed183ea9dc97b755f6ebb41da9249a

SHA512
1943f03322df5ad3faedb25943027a1df2c2b6e89e88c5ed78444c6263c4a178dd48ad3c233cfea7537746e19097ef0fd1da2db5d1f090b9a2b2452de6b6aec4

Download Submit
C:\Users\Admin\AppData\Local\2fdc20fd-8f22-45a0-8723-3ebaaae62a1c\file.exe

Filesize
703KB

MD5
4ab7f99ee2a21823a94f2faaab068c7b

SHA1
d7c7a4ebb1dc15a5889c9160334e197fc6362e35

SHA256
2a707ff6a4840639e838d39cc367333bb92da01d39642002c1d26e26889df119

SHA512
bbeaae0fad7e03f88cd669f3dc86529bfba1c24fccd76aa75bf2a5572b49db2fe058b3defaebad411d684af0aab649b25e909df5f46846e7c4dbeb393a2534b7

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cab4598.tmp

Filesize
65KB

MD5
ac05d27423a85adc1622c714f2cb6184

SHA1
b0fe2b1abddb97837ea0195be70ab2ff14d43198

SHA256
c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

SHA512
6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

Download Submit
memory/1592-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1592-7-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1592-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1592-2-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1592-8-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1644-3-0x00000000008E0000-0x00000000009FB000-memory.dmp

Filesize
1.1MB

Download
memory/1644-1-0x0000000000230000-0x00000000002C2000-memory.dmp

Filesize
584KB

Download
memory/1644-0-0x0000000000230000-0x00000000002C2000-memory.dmp

Filesize
584KB

Download
memory/2708-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2708-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2708-49-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2708-48-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2708-54-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2708-56-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2708-57-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2708-58-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2756-27-0x0000000002000000-0x0000000002092000-memory.dmp

Filesize
584KB

Download
memory/2756-29-0x0000000002000000-0x0000000002092000-memory.dmp

Filesize
584KB

Download