djvu | 56529b359e4c4695a3e290752d61c59ad3327a16574da95ca69a214552241a63

Analysis

max time kernel
144s
max time network
124s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
26/01/2024, 08:54

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General

Target
file.exe
Size 749KB
Sample240126-kty3vsbdhn
SHA256 56529b359e4c4695a3e290752d61c59ad3327a16574da95ca69a214552241a63
MD5 87ba288f14fbf826d4cf061d9f8e72ed
SHA1 ec1f877e40b5e8917953e54eb51834a15335aa6e
SHA512 200457f3c9f1120c6c97df354d7e9898e0a3dfecb6fb771985f9e28adaab29841e03e37e1100b759ae7baf89072859082aa3ddc340a8501396426441f8391f95
SSDEEP 12288:lL++FQkxaH3tr2VBEMuw6mQVSql6SoP0bSJg5J8m5ubKrD4Akb5i2yj5+:U+FQkxI2E5oPI0Kp5ubKX4S+
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.cdxx
offline_id
LBxKKiegnAy53rpqH3Pj2j46vwldiEt9kqHSuMt1
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-iVcrVFVRqu 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: 0847ASdw

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 13 IoCs

resource	yara_rule
behavioral1/memory/3004-0-0x0000000004550000-0x000000000466B000-memory.dmp	family_djvu
behavioral1/memory/2840-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2840-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2840-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2840-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2856-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2856-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2856-44-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2856-46-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2856-50-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2856-52-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2856-53-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2856-54-0x0000000000400000-0x0000000000537000-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
2680	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-1-5-21-3308111660-3636268597-2291490419-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\188997aa-45f0-4875-bc64-baddc91d1558\\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 3004 set thread context of 2840	3004	file.exe	28
PID 2664 set thread context of 2856	2664	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
2840	file.exe
2856	file.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 3004 wrote to memory of 2840	3004	file.exe	28
PID 3004 wrote to memory of 2840	3004	file.exe	28
PID 3004 wrote to memory of 2840	3004	file.exe	28
PID 3004 wrote to memory of 2840	3004	file.exe	28
PID 3004 wrote to memory of 2840	3004	file.exe	28
PID 3004 wrote to memory of 2840	3004	file.exe	28
PID 3004 wrote to memory of 2840	3004	file.exe	28
PID 3004 wrote to memory of 2840	3004	file.exe	28
PID 3004 wrote to memory of 2840	3004	file.exe	28
PID 3004 wrote to memory of 2840	3004	file.exe	28
PID 3004 wrote to memory of 2840	3004	file.exe	28
PID 2840 wrote to memory of 2680	2840	file.exe	29
PID 2840 wrote to memory of 2680	2840	file.exe	29
PID 2840 wrote to memory of 2680	2840	file.exe	29
PID 2840 wrote to memory of 2680	2840	file.exe	29
PID 2840 wrote to memory of 2664	2840	file.exe	30
PID 2840 wrote to memory of 2664	2840	file.exe	30
PID 2840 wrote to memory of 2664	2840	file.exe	30
PID 2840 wrote to memory of 2664	2840	file.exe	30
PID 2664 wrote to memory of 2856	2664	file.exe	31
PID 2664 wrote to memory of 2856	2664	file.exe	31
PID 2664 wrote to memory of 2856	2664	file.exe	31
PID 2664 wrote to memory of 2856	2664	file.exe	31
PID 2664 wrote to memory of 2856	2664	file.exe	31
PID 2664 wrote to memory of 2856	2664	file.exe	31
PID 2664 wrote to memory of 2856	2664	file.exe	31
PID 2664 wrote to memory of 2856	2664	file.exe	31
PID 2664 wrote to memory of 2856	2664	file.exe	31
PID 2664 wrote to memory of 2856	2664	file.exe	31
PID 2664 wrote to memory of 2856	2664	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:3004
- 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:2840
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\188997aa-45f0-4875-bc64-baddc91d1558" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2680
- - 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:2664
  - - C:\Users\Admin\AppData\Local\Temp\file.exe
      "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2856

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

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 1KB
SHA256 d7005273bab949c42fcc73eac7820c4c5f08df1e9095020cdb0e17fc9e282d50
MD5 73ce21ff1fb2989f6350ace9274ae9b5
SHA1 7db6c387eb8351f3e8e361d10224711c3477821e
SHA512 a43767a55a559a8bf51d5dcb9bc378167f63e15f571b6be35903048570d036fed2a3f6a37c91f469ee9808d245cdd875b9dad38556e6bf97258a82c7071aeab3
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 724B
SHA256 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
MD5 8202a1cd02e7d69597995cabbe881a12
SHA1 8858d9d934b7aa9330ee73de6c476acf19929ff6
SHA512 97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9
MD5 SHA1 SHA512

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24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 410B
SHA256 3747ee341239c80af43479b6c5fa0ed2b4fa4015b4ed9edf60eb5b9da30e853a
MD5 82cda0583fc28f160d28e62037944d72
SHA1 f974344c690f5735e82dfcfc991bbc9e16e07988
SHA512 e2ee708578059f0d299a342d05f15b92ea9b13f9c2305a5c86a3a1beb09c1fe2da813d3bfa7db587fdbc39669efd92ddfb0c562ef79d60aeac200a1b7a132007
MD5 SHA1 SHA512

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94308059B57B3142E455B38A6EB92015

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Size 344B
SHA256 b07e97d0c062f029ec8e0341ff7282b8f34fd77227f52cff01c675b15ed303a2
MD5 e96d2fe8f224b3125294b36512fc55fd
SHA1 6cb5ee0da872a9217c6142648e49244d951f2f61
SHA512 d6e359de19a4f440d48857490d7bd4fe81042e5d238aaad519c2ae61a5ea9bd2f70048738535b1d6b12fe4edb4608ca60f6b075f67e05e97dd7faf02479a812c
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 c3fb453363b2581f0f8fd7c59d92a7ae72df9b73a4a9dd9a621ec43e7f0bf024
MD5 bb251a4555ee8e9dd472749adaf66ef3
SHA1 2ea4fd406022a4a9f2db81e0d57e1819cfb066fc
SHA512 a26b3903882f5523ed2ef6b855cdfc7f2185bba0fb80631233fb1bae0b8064499e438bd27fb036547e8a41733545990467a320f6799fbff76f72d8a6baaddd6f
MD5 SHA1 SHA512

Submit Download

file.exe

Path C:\Users\Admin\AppData\Local\188997aa-45f0-4875-bc64-baddc91d1558\file.exe
Size 749KB
SHA256 56529b359e4c4695a3e290752d61c59ad3327a16574da95ca69a214552241a63
MD5 87ba288f14fbf826d4cf061d9f8e72ed
SHA1 ec1f877e40b5e8917953e54eb51834a15335aa6e
SHA512 200457f3c9f1120c6c97df354d7e9898e0a3dfecb6fb771985f9e28adaab29841e03e37e1100b759ae7baf89072859082aa3ddc340a8501396426441f8391f95
SSDEEP 12288:lL++FQkxaH3tr2VBEMuw6mQVSql6SoP0bSJg5J8m5ubKrD4Akb5i2yj5+:U+FQkxI2E5oPI0Kp5ubKX4S+
MD5 SHA1 SHA512 SSDEEP

Submit Download

Cab4F0A.tmp

Path C:\Users\Admin\AppData\Local\Temp\Cab4F0A.tmp
Size 65KB
SHA256 c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d
MD5 ac05d27423a85adc1622c714f2cb6184
SHA1 b0fe2b1abddb97837ea0195be70ab2ff14d43198
SHA512 6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d
SSDEEP 1536:drFvD2YSE/sFDqV0FJJynkAhftCvMd3coa282frgW1qgNzU:drVDJSeaDqV0FJwLhVkr282fF5U
MD5 SHA1 SHA512 SSDEEP

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memory/2840-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2840-24-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2840-1-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

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memory/2840-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2840-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2856-44-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2856-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2856-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2856-46-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2856-50-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2856-52-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2856-53-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2856-54-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3004-0-0x0000000004550000-0x000000000466B000-memory.dmp

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