djvu | b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba

Analysis

max time kernel
293s
max time network
154s
platform
windows7_x64
resource
win7-20240215-en
resource tags

arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
submitted
02/05/2024, 22:27

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General

Target
b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe
Size 790KB
Sample240502-2c2k4agc4x
SHA256 b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba
MD5 6cfe2406e455d36d811044995c2fbc6f
SHA1 4990445095184c656d0221d77815e221a0e1ce76
SHA512 f1528e12f1ad559053a52616531b0a1388577b6ba97fefdbbed34bc8bc245f6788053dacf001e2607e1173ef85eef23ebd3f5f72b68f4a74c5ed9b34410ee1b9
SSDEEP 12288:YzB2L9gHLT7eWDKcwxZLvqdgj1LbW8RUp5LZ9eIDMS3shf:9xi7bK7Lu8OZ5KiMhh
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 13 IoCs

resource	yara_rule
behavioral1/memory/1956-6-0x0000000004430000-0x000000000454B000-memory.dmp	family_djvu
behavioral1/memory/1856-7-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1856-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1856-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1856-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2936-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2936-45-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2936-46-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2936-47-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2936-50-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2936-52-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2936-53-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2936-54-0x0000000000400000-0x0000000000537000-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
1964	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-1-5-21-2248906074-2862704502-246302768-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\37b92372-2882-4c66-ae36-e971954d4d47\\b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe\" --AutoStart"	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.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 1956 set thread context of 1856	1956	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	28
PID 2420 set thread context of 2936	2420	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.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
1856	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe
2936	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1956 wrote to memory of 1856	1956	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	28
PID 1956 wrote to memory of 1856	1956	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	28
PID 1956 wrote to memory of 1856	1956	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	28
PID 1956 wrote to memory of 1856	1956	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	28
PID 1956 wrote to memory of 1856	1956	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	28
PID 1956 wrote to memory of 1856	1956	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	28
PID 1956 wrote to memory of 1856	1956	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	28
PID 1956 wrote to memory of 1856	1956	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	28
PID 1956 wrote to memory of 1856	1956	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	28
PID 1956 wrote to memory of 1856	1956	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	28
PID 1956 wrote to memory of 1856	1956	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	28
PID 1856 wrote to memory of 1964	1856	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	29
PID 1856 wrote to memory of 1964	1856	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	29
PID 1856 wrote to memory of 1964	1856	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	29
PID 1856 wrote to memory of 1964	1856	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	29
PID 1856 wrote to memory of 2420	1856	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	30
PID 1856 wrote to memory of 2420	1856	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	30
PID 1856 wrote to memory of 2420	1856	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	30
PID 1856 wrote to memory of 2420	1856	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	30
PID 2420 wrote to memory of 2936	2420	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	31
PID 2420 wrote to memory of 2936	2420	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	31
PID 2420 wrote to memory of 2936	2420	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	31
PID 2420 wrote to memory of 2936	2420	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	31
PID 2420 wrote to memory of 2936	2420	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	31
PID 2420 wrote to memory of 2936	2420	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	31
PID 2420 wrote to memory of 2936	2420	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	31
PID 2420 wrote to memory of 2936	2420	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	31
PID 2420 wrote to memory of 2936	2420	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	31
PID 2420 wrote to memory of 2936	2420	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	31
PID 2420 wrote to memory of 2936	2420	b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe	31

C:\Users\Admin\AppData\Local\Temp\b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe
"C:\Users\Admin\AppData\Local\Temp\b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1956
- C:\Users\Admin\AppData\Local\Temp\b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe
  "C:\Users\Admin\AppData\Local\Temp\b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1856
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\37b92372-2882-4c66-ae36-e971954d4d47" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1964
- - C:\Users\Admin\AppData\Local\Temp\b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe
    "C:\Users\Admin\AppData\Local\Temp\b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2420
  - - C:\Users\Admin\AppData\Local\Temp\b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe
      "C:\Users\Admin\AppData\Local\Temp\b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2936

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 a923caeac048416a4f6d16993cd0428c085e9e5704190cf6ec6263e25d363969
MD5 4c46ed5fedad016479cacc0840ef1dad
SHA1 6af64fdc9b149490ab4485fecaa374c07004bcc6
SHA512 cc64de7b08f3299973f1e05881284ffcd0ba9681b00aa65077d95670576e386ac5e8591867536b2a71addc22e41d545b075b180f30aa218a20691d65ec6f8ad8
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 76dd123bd7f325e152e8ed07ab8350a1245a3dc7544a8977a29d006722922780
MD5 65ecfc49ea02273e2043664a4f37c380
SHA1 72b4af2962fe0d1b2afe3496ee09b2dd93463d12
SHA512 469975b2279236e3da89a6ff968cce5d80a163c08ea3bbd9042bf86114cf23e737f367cf663adccd44d13041261d714576cab16576e385cbfa7adab2a8de66d0
MD5 SHA1 SHA512

Submit Download

94308059B57B3142E455B38A6EB92015

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Size 344B
SHA256 cb072e9ac1c2344ec813ab02b709c8e490dac2b5b27c6d9b9591376778c90818
MD5 1bdd2d4ad518373d104b96fb75435e0f
SHA1 1559d47b301fe445356b65e2f22d284dc9f5bba0
SHA512 f51b433aae108ee491383cd6c5b9ab51748785e90979a39ff6187a1c5c0df8c2b6fd9911bb2064b5123e6ef8acb78d07b730021a9fed26846998a10c1f5e0a01
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 8973068e441cd7a698865137058c590f26264ab84fbf822eb12d554a51b6c5ee
MD5 4aaf6a19a8344dd13b05468975945457
SHA1 b29a0020238707bb903167a5801fce3836113861
SHA512 0a83d9e4c31f5f95b57a9a77a7c261067ad7b3f5cec971b32d91a46f44cef574203b97b96df2f1af9f02b178f68e9cf9f19a618c0e9a9bb1746d70afb9918592
MD5 SHA1 SHA512

Submit Download

b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe

Path C:\Users\Admin\AppData\Local\37b92372-2882-4c66-ae36-e971954d4d47\b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba.exe
Size 790KB
SHA256 b8bea06799a11057f668c2312575261d7a62561589f6668b4ce5e94e0ea1b7ba
MD5 6cfe2406e455d36d811044995c2fbc6f
SHA1 4990445095184c656d0221d77815e221a0e1ce76
SHA512 f1528e12f1ad559053a52616531b0a1388577b6ba97fefdbbed34bc8bc245f6788053dacf001e2607e1173ef85eef23ebd3f5f72b68f4a74c5ed9b34410ee1b9
SSDEEP 12288:YzB2L9gHLT7eWDKcwxZLvqdgj1LbW8RUp5LZ9eIDMS3shf:9xi7bK7Lu8OZ5KiMhh
MD5 SHA1 SHA512 SSDEEP

Submit Download

Cab141D.tmp

Path C:\Users\Admin\AppData\Local\Temp\Cab141D.tmp
Size 65KB
SHA256 c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d
MD5 ac05d27423a85adc1622c714f2cb6184
SHA1 b0fe2b1abddb97837ea0195be70ab2ff14d43198
SHA512 6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d
SSDEEP 1536:drFvD2YSE/sFDqV0FJJynkAhftCvMd3coa282frgW1qgNzU:drVDJSeaDqV0FJwLhVkr282fF5U
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1856-8-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1856-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1856-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1856-2-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

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memory/1856-7-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1956-1-0x0000000002C00000-0x0000000002C92000-memory.dmp

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memory/1956-0-0x0000000002C00000-0x0000000002C92000-memory.dmp

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memory/1956-6-0x0000000004430000-0x000000000454B000-memory.dmp

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memory/2420-29-0x00000000002A0000-0x0000000000332000-memory.dmp

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memory/2936-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2936-45-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2936-46-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2936-47-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2936-50-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2936-52-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2936-53-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2936-54-0x0000000000400000-0x0000000000537000-memory.dmp

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