djvu | 78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe

Analysis

max time kernel
295s
max time network
244s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
05/05/2024, 22:40

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General

Target
78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe
Size 774KB
Sample240505-2lwffagc2x
SHA256 78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe
MD5 5b14f1bfbc29a60b38ba51486799d5f5
SHA1 cf0e44b5e5368667d47b13d8e88497343779d20f
SHA512 acb6f8cf49827a02da12897eacf5bfadd484f80f1c199e069c61a267a2e7dd8c8126250adbf9658741c23f3ae0d4b44b376426b3f1345bec4a5db3170e7008b8
SSDEEP 12288:a7G68NrNixvp1l9t2tEULNc3RYVu2ETIT35l0td5KZ6YHwDDk:a7G5gx7lWtNLNcZ2E9oZlED
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.qehu
offline_id
jgILOjDrBgyzY4JmT3B2jDSyBmDPBruKk8bKs6t1
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/665ddae3fc3cd10bbaaa4350408b196920240504141005/4cae7e 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: 0868PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 14 IoCs

resource	yara_rule
behavioral2/memory/4216-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3104-4-0x00000000049E0000-0x0000000004AFB000-memory.dmp	family_djvu
behavioral2/memory/4216-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4216-1-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4216-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4216-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4008-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4008-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4008-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4008-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4008-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4008-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4008-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4008-36-0x0000000000400000-0x0000000000537000-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
3108	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-1-5-21-3968772205-1713802336-1776639840-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\83863cdf-8bd0-4b32-b47e-5abda993db57\\78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe\" --AutoStart"	78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.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
10	api.2ip.ua
1	api.2ip.ua
2	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3104 set thread context of 4216	3104	78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe	73
PID 2724 set thread context of 4008	2724	78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe	77

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
4216	78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe
4216	78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe
4008	78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe
4008	78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3104 wrote to memory of 4216	3104	78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe	73
PID 3104 wrote to memory of 4216	3104	78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe	73
PID 3104 wrote to memory of 4216	3104	78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe	73
PID 3104 wrote to memory of 4216	3104	78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe	73
PID 3104 wrote to memory of 4216	3104	78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe	73
PID 3104 wrote to memory of 4216	3104	78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe	73
PID 3104 wrote to memory of 4216	3104	78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe	73
PID 3104 wrote to memory of 4216	3104	78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe	73
PID 3104 wrote to memory of 4216	3104	78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe	73
PID 3104 wrote to memory of 4216	3104	78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe	73
PID 4216 wrote to memory of 3108	4216	78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe	74
PID 4216 wrote to memory of 3108	4216	78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe	74
PID 4216 wrote to memory of 3108	4216	78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe	74
PID 4216 wrote to memory of 2724	4216	78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe	75
PID 4216 wrote to memory of 2724	4216	78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe	75
PID 4216 wrote to memory of 2724	4216	78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe	75
PID 2724 wrote to memory of 4008	2724	78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe	77
PID 2724 wrote to memory of 4008	2724	78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe	77
PID 2724 wrote to memory of 4008	2724	78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe	77
PID 2724 wrote to memory of 4008	2724	78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe	77
PID 2724 wrote to memory of 4008	2724	78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe	77
PID 2724 wrote to memory of 4008	2724	78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe	77
PID 2724 wrote to memory of 4008	2724	78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe	77
PID 2724 wrote to memory of 4008	2724	78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe	77
PID 2724 wrote to memory of 4008	2724	78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe	77
PID 2724 wrote to memory of 4008	2724	78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe	77

C:\Users\Admin\AppData\Local\Temp\78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe
"C:\Users\Admin\AppData\Local\Temp\78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3104
- C:\Users\Admin\AppData\Local\Temp\78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe
  "C:\Users\Admin\AppData\Local\Temp\78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4216
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\83863cdf-8bd0-4b32-b47e-5abda993db57" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3108
- - C:\Users\Admin\AppData\Local\Temp\78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe
    "C:\Users\Admin\AppData\Local\Temp\78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2724
  - - C:\Users\Admin\AppData\Local\Temp\78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe
      "C:\Users\Admin\AppData\Local\Temp\78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4008

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 e8569d7b34f8be2c39d098acfc395bde7c314d0ad55b1efefca52ebb3fd3c06a
MD5 aba874fc4f2284853fb8b79aadaeb991
SHA1 e5eafdcc5da8536f1d3a6d138466bb026c0704ad
SHA512 c97cc627ea538fcea4dcb5aefc497adb24c919046d5b6393fdc5c747511d23893d53c612579fadfb8338d6754fa12ba247b1a44a86b0802d075fc6cf2ebf1553
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 c10018b858c1263ae35a7d9afceacd13efce7721e74d6be9d2bd31eb00b3bb80
MD5 492946bb85b3114b20728bc0d2bb48e4
SHA1 2ba48dc9d00236b22409f12e9c53c10cbaa830c3
SHA512 138b47f8b96b71321c58fa4eb734f0b7ce9ef64af522e97a76c559bf182569a46f3c4639e26cb54b4ab2d09797c511627d8c673c5723e1b1a118f433688e96f2
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 15b380f061e41af43291dfb22993bca898bcfe0fa18e4396b1a9b23599edece7
MD5 a669656c907941cbef8863c66ae3c930
SHA1 95be562279715939304a7a44468c992033dd2701
SHA512 b3173728d89b59b283224091c1b63e58931ad711c25e31e0ac3702c0c47a5502e91613718a906f06a1fb7b503986bccf575993d92f7ff56e0e69eca245fb4bc2
MD5 SHA1 SHA512

Submit Download

78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe

Path C:\Users\Admin\AppData\Local\83863cdf-8bd0-4b32-b47e-5abda993db57\78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe.exe
Size 774KB
SHA256 78b8e716db280ca8806dfa21824b993c592c33baba2a238cf2bd839f454a9cbe
MD5 5b14f1bfbc29a60b38ba51486799d5f5
SHA1 cf0e44b5e5368667d47b13d8e88497343779d20f
SHA512 acb6f8cf49827a02da12897eacf5bfadd484f80f1c199e069c61a267a2e7dd8c8126250adbf9658741c23f3ae0d4b44b376426b3f1345bec4a5db3170e7008b8
SSDEEP 12288:a7G68NrNixvp1l9t2tEULNc3RYVu2ETIT35l0td5KZ6YHwDDk:a7G5gx7lWtNLNcZ2E9oZlED
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/3104-4-0x00000000049E0000-0x0000000004AFB000-memory.dmp

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memory/3104-3-0x0000000002F70000-0x0000000003009000-memory.dmp

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memory/4008-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4008-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4008-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4008-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4008-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4008-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4008-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4008-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4216-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4216-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4216-1-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4216-2-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4216-5-0x0000000000400000-0x0000000000537000-memory.dmp

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