djvu | 2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2

Analysis

max time kernel
148s
max time network
120s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
25/04/2024, 01:13

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General

Target
2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe
Size 762KB
Sample240425-blff4scg6x
SHA256 2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2
MD5 03cea6f6022a3a08d1ea003091a3e502
SHA1 643e34573258d1511921c8d97a5b3c26d6c70b62
SHA512 560ec4d84a74b9089d12a6e00b02acb8fa1364f75172a2fd0916c030350ff9fe32ea137a3fdd8df3648870c82935131fdee9de6d00066d97f9d073cf85648e42
SSDEEP 12288:e2ZPFVL/YNfMNwpo4id34UcFg522Af3mhQIDBYHJD9wICzXXRXGoKU:e2tcMNqo3/c+52TvsQ0CjCdKU
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.bgzq
offline_id
Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1
payload_url
http://sdfjhuz.com/dl/build2.exe

http://cajgtus.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. Do not ask assistants from youtube and recovery data sites for help in recovering your data. They can use your free decryption quota and scam you. Our contact is emails in this text document only. You can get and look video overview decrypt tool: https://wetransfer.com/downloads/54cdfd152fe98eedb628a1f4ddb7076420240421150208/403a27 Price of private key and decrypt software is $999. Discount 50% available if you contact us first 72 hours, that's price for you is $499. 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: 0864PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 14 IoCs

resource	yara_rule
behavioral1/memory/1260-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2820-5-0x0000000005960000-0x0000000005A7B000-memory.dmp	family_djvu
behavioral1/memory/1260-7-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1260-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1260-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2612-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2612-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2612-49-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2612-50-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2612-51-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2612-54-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2612-56-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2612-57-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2612-58-0x0000000000400000-0x0000000000537000-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
2556	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-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\33dc064b-d781-402c-87f2-c6ae9113f102\\2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe\" --AutoStart"	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.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 2820 set thread context of 1260	2820	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	28
PID 2440 set thread context of 2612	2440	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	31

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
1260	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe
2612	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe
2612	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2820 wrote to memory of 1260	2820	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	28
PID 2820 wrote to memory of 1260	2820	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	28
PID 2820 wrote to memory of 1260	2820	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	28
PID 2820 wrote to memory of 1260	2820	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	28
PID 2820 wrote to memory of 1260	2820	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	28
PID 2820 wrote to memory of 1260	2820	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	28
PID 2820 wrote to memory of 1260	2820	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	28
PID 2820 wrote to memory of 1260	2820	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	28
PID 2820 wrote to memory of 1260	2820	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	28
PID 2820 wrote to memory of 1260	2820	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	28
PID 2820 wrote to memory of 1260	2820	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	28
PID 1260 wrote to memory of 2556	1260	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	29
PID 1260 wrote to memory of 2556	1260	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	29
PID 1260 wrote to memory of 2556	1260	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	29
PID 1260 wrote to memory of 2556	1260	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	29
PID 1260 wrote to memory of 2440	1260	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	30
PID 1260 wrote to memory of 2440	1260	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	30
PID 1260 wrote to memory of 2440	1260	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	30
PID 1260 wrote to memory of 2440	1260	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	30
PID 2440 wrote to memory of 2612	2440	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	31
PID 2440 wrote to memory of 2612	2440	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	31
PID 2440 wrote to memory of 2612	2440	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	31
PID 2440 wrote to memory of 2612	2440	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	31
PID 2440 wrote to memory of 2612	2440	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	31
PID 2440 wrote to memory of 2612	2440	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	31
PID 2440 wrote to memory of 2612	2440	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	31
PID 2440 wrote to memory of 2612	2440	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	31
PID 2440 wrote to memory of 2612	2440	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	31
PID 2440 wrote to memory of 2612	2440	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	31
PID 2440 wrote to memory of 2612	2440	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	31

C:\Users\Admin\AppData\Local\Temp\2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe
"C:\Users\Admin\AppData\Local\Temp\2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2820
- C:\Users\Admin\AppData\Local\Temp\2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe
  "C:\Users\Admin\AppData\Local\Temp\2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1260
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\33dc064b-d781-402c-87f2-c6ae9113f102" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2556
- - C:\Users\Admin\AppData\Local\Temp\2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe
    "C:\Users\Admin\AppData\Local\Temp\2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2440
  - - C:\Users\Admin\AppData\Local\Temp\2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe
      "C:\Users\Admin\AppData\Local\Temp\2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2612

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 a7760866eaf849b079815652f9dce9eb9ec7c599199bc65c7030ca9e2ed91c26
MD5 f8ed6292d6d2f9514668acec50849d17
SHA1 482745d97c48b32fd986e488d169ac4eb7edd737
SHA512 ebc265c4a27c4a1d14ef783b28f3cb0de9ca4f28795078c3d80bf2ec6574c4e8f3f3c7c68197b1ea6f037cb88268cfab99817660f442696167120bc6275cad4f
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

Submit Download

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 410B
SHA256 74ebf2f43bdf64506c8e8d6e18b6ddd6b38ab3b46c0a31dde5d3cf8c4fa9bdab
MD5 b85e05f34593aaeccdffd7504d4ba450
SHA1 19338ce046e200799197f4243e5227eaca0d44bb
SHA512 2773e1351eb4caea8fe6a008fffd8cc29c0ade611b14e8a9a5f155ccfc4c9ec317cc76b9502a0b92164b55169dae0f1e62edf0468b5943c950f13bea31fbd387
MD5 SHA1 SHA512

Submit Download

94308059B57B3142E455B38A6EB92015

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Size 344B
SHA256 923eebb31ed29148d68d2354c593ac9d30950a11b949ebd5b712521ce7cbb90f
MD5 c0cc1cc70d1702ac727d2f603e528000
SHA1 5b000f9d2acc065c3a3e4e20908c27e1b9c97cb5
SHA512 f6a0c06cd3de26d4de230798e525def72baf6ba1c5b87d76c4d6e135bc07a73d8745d6f9f2674625900a212239e2e6678f7f9db42697b04b3e3af7fbe5b0b676
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 a4fb6eaea2a25ddd7cd26f5aa2b0b3b0c0deaee7e9a23efd5bc83ac70ceb0163
MD5 22894a61e07345c507991e193e8b891f
SHA1 57c350270eab9ee88ec288720b5ccc79e07aca10
SHA512 3c7bfc838d62e5e20c0b5b5607d8b973022edbf7931513fcd81e886b6ccf7f34b8c3e98d056458fba2d137fd124463de60f3e21f0618c4958c5c5155fd2a0d54
MD5 SHA1 SHA512

Submit Download

2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe

Path C:\Users\Admin\AppData\Local\33dc064b-d781-402c-87f2-c6ae9113f102\2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe
Size 762KB
SHA256 2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2
MD5 03cea6f6022a3a08d1ea003091a3e502
SHA1 643e34573258d1511921c8d97a5b3c26d6c70b62
SHA512 560ec4d84a74b9089d12a6e00b02acb8fa1364f75172a2fd0916c030350ff9fe32ea137a3fdd8df3648870c82935131fdee9de6d00066d97f9d073cf85648e42
SSDEEP 12288:e2ZPFVL/YNfMNwpo4id34UcFg522Af3mhQIDBYHJD9wICzXXRXGoKU:e2tcMNqo3/c+52TvsQ0CjCdKU
MD5 SHA1 SHA512 SSDEEP

Submit Download

Cab4460.tmp

Path C:\Users\Admin\AppData\Local\Temp\Cab4460.tmp
Size 65KB
SHA256 c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d
MD5 ac05d27423a85adc1622c714f2cb6184
SHA1 b0fe2b1abddb97837ea0195be70ab2ff14d43198
SHA512 6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d
SSDEEP 1536:drFvD2YSE/sFDqV0FJJynkAhftCvMd3coa282frgW1qgNzU:drVDJSeaDqV0FJwLhVkr282fF5U
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1260-8-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1260-7-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1260-26-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1260-1-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

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memory/1260-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2440-29-0x0000000000330000-0x00000000003C2000-memory.dmp

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memory/2440-34-0x0000000000330000-0x00000000003C2000-memory.dmp

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memory/2440-27-0x0000000000330000-0x00000000003C2000-memory.dmp

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memory/2612-49-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2612-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2612-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2612-50-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2612-51-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2612-54-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2612-56-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2612-57-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2612-58-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2820-3-0x00000000041A0000-0x0000000004232000-memory.dmp

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memory/2820-5-0x0000000005960000-0x0000000005A7B000-memory.dmp

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memory/2820-0-0x00000000041A0000-0x0000000004232000-memory.dmp

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