djvu | e8e4e7c6cb617626608bec2c76580609516939a94f58a7de0ba42facc5e30aae

Analysis

max time kernel
143s
max time network
122s
platform
windows7_x64
resource
win7-20240215-en
resource tags

arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
submitted
07-05-2024 17:26

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General

Target

ef1a068842499608f3176406f4bada90_NEAS.exe
Size

773KB
MD5

ef1a068842499608f3176406f4bada90
SHA1

644ad7404c4af0e9c03ed3cda8122f9d966e6c77
SHA256

e8e4e7c6cb617626608bec2c76580609516939a94f58a7de0ba42facc5e30aae
SHA512

d7670ddb8c9de4a44c775dcbb1f2a037e73367a4af2a8e7d6450e687ea7dbc54cececb6f90f2e9986c214b6c25be37e00973abcb9b06199cf9600798f72e1c9f
SSDEEP

12288:L/ZKbjZuSSqmeuqMFVH0C1yaGFUUukKtx+WYl0EcdlBnUpF1uRg/GgW7vN/pycOC:dyr3MB0u9+F0l7SpF0/lL2g

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 13 IoCs

resource	yara_rule
behavioral1/memory/3020-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2916-5-0x0000000001A90000-0x0000000001BAB000-memory.dmp	family_djvu
behavioral1/memory/3020-7-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3020-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3020-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2180-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2180-45-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2180-44-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2180-46-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2180-51-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2180-52-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2180-49-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2180-53-0x0000000000400000-0x0000000000537000-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
2560	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\\8e128e0a-6551-4232-9070-57ef52d9cbc9\\ef1a068842499608f3176406f4bada90_NEAS.exe\" --AutoStart"	ef1a068842499608f3176406f4bada90_NEAS.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
4	api.2ip.ua
9	api.2ip.ua
3	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2916 set thread context of 3020	2916	ef1a068842499608f3176406f4bada90_NEAS.exe	28
PID 2732 set thread context of 2180	2732	ef1a068842499608f3176406f4bada90_NEAS.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
3020	ef1a068842499608f3176406f4bada90_NEAS.exe
2180	ef1a068842499608f3176406f4bada90_NEAS.exe
2180	ef1a068842499608f3176406f4bada90_NEAS.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2916 wrote to memory of 3020	2916	ef1a068842499608f3176406f4bada90_NEAS.exe	28
PID 2916 wrote to memory of 3020	2916	ef1a068842499608f3176406f4bada90_NEAS.exe	28
PID 2916 wrote to memory of 3020	2916	ef1a068842499608f3176406f4bada90_NEAS.exe	28
PID 2916 wrote to memory of 3020	2916	ef1a068842499608f3176406f4bada90_NEAS.exe	28
PID 2916 wrote to memory of 3020	2916	ef1a068842499608f3176406f4bada90_NEAS.exe	28
PID 2916 wrote to memory of 3020	2916	ef1a068842499608f3176406f4bada90_NEAS.exe	28
PID 2916 wrote to memory of 3020	2916	ef1a068842499608f3176406f4bada90_NEAS.exe	28
PID 2916 wrote to memory of 3020	2916	ef1a068842499608f3176406f4bada90_NEAS.exe	28
PID 2916 wrote to memory of 3020	2916	ef1a068842499608f3176406f4bada90_NEAS.exe	28
PID 2916 wrote to memory of 3020	2916	ef1a068842499608f3176406f4bada90_NEAS.exe	28
PID 2916 wrote to memory of 3020	2916	ef1a068842499608f3176406f4bada90_NEAS.exe	28
PID 3020 wrote to memory of 2560	3020	ef1a068842499608f3176406f4bada90_NEAS.exe	29
PID 3020 wrote to memory of 2560	3020	ef1a068842499608f3176406f4bada90_NEAS.exe	29
PID 3020 wrote to memory of 2560	3020	ef1a068842499608f3176406f4bada90_NEAS.exe	29
PID 3020 wrote to memory of 2560	3020	ef1a068842499608f3176406f4bada90_NEAS.exe	29
PID 3020 wrote to memory of 2732	3020	ef1a068842499608f3176406f4bada90_NEAS.exe	30
PID 3020 wrote to memory of 2732	3020	ef1a068842499608f3176406f4bada90_NEAS.exe	30
PID 3020 wrote to memory of 2732	3020	ef1a068842499608f3176406f4bada90_NEAS.exe	30
PID 3020 wrote to memory of 2732	3020	ef1a068842499608f3176406f4bada90_NEAS.exe	30
PID 2732 wrote to memory of 2180	2732	ef1a068842499608f3176406f4bada90_NEAS.exe	31
PID 2732 wrote to memory of 2180	2732	ef1a068842499608f3176406f4bada90_NEAS.exe	31
PID 2732 wrote to memory of 2180	2732	ef1a068842499608f3176406f4bada90_NEAS.exe	31
PID 2732 wrote to memory of 2180	2732	ef1a068842499608f3176406f4bada90_NEAS.exe	31
PID 2732 wrote to memory of 2180	2732	ef1a068842499608f3176406f4bada90_NEAS.exe	31
PID 2732 wrote to memory of 2180	2732	ef1a068842499608f3176406f4bada90_NEAS.exe	31
PID 2732 wrote to memory of 2180	2732	ef1a068842499608f3176406f4bada90_NEAS.exe	31
PID 2732 wrote to memory of 2180	2732	ef1a068842499608f3176406f4bada90_NEAS.exe	31
PID 2732 wrote to memory of 2180	2732	ef1a068842499608f3176406f4bada90_NEAS.exe	31
PID 2732 wrote to memory of 2180	2732	ef1a068842499608f3176406f4bada90_NEAS.exe	31
PID 2732 wrote to memory of 2180	2732	ef1a068842499608f3176406f4bada90_NEAS.exe	31

C:\Users\Admin\AppData\Local\Temp\ef1a068842499608f3176406f4bada90_NEAS.exe
"C:\Users\Admin\AppData\Local\Temp\ef1a068842499608f3176406f4bada90_NEAS.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2916
- C:\Users\Admin\AppData\Local\Temp\ef1a068842499608f3176406f4bada90_NEAS.exe
  "C:\Users\Admin\AppData\Local\Temp\ef1a068842499608f3176406f4bada90_NEAS.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3020
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\8e128e0a-6551-4232-9070-57ef52d9cbc9" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2560
- - C:\Users\Admin\AppData\Local\Temp\ef1a068842499608f3176406f4bada90_NEAS.exe
    "C:\Users\Admin\AppData\Local\Temp\ef1a068842499608f3176406f4bada90_NEAS.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2732
  - - C:\Users\Admin\AppData\Local\Temp\ef1a068842499608f3176406f4bada90_NEAS.exe
      "C:\Users\Admin\AppData\Local\Temp\ef1a068842499608f3176406f4bada90_NEAS.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2180

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
af14424bd91fa356e225129fe451aacc

SHA1
4046dc95051bf8382196ff1fec36326c22dc1aae

SHA256
26f7df2742be7eae0cecb3954ab69d2f1ad25c6b63a21e3a477ea34dee8301ae

SHA512
362068ce189ee00c318b574ebc8fc4f2e09add21f6c79aea8fe2f69ece44c0beaeb6c7fec7297a0b758ea5b8879ab0e9993c74ab262e200e289c05833e734179

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
75d31ed0f62e39bbae3f2f9906d1987d

SHA1
fdfd21af26503425c626abc0ef0fd3c22f4ce61c

SHA256
1ec892cdcb7e92b03f5d17a871a2fc35fd9f51d9d55789700a436e49b46b5c6a

SHA512
5a7d5a5a428e5b6aab8c87e405cb6087643d1e0207cc3573bd36f23b02e0464c59a0f8ffdf29c5db2cc577f21ab9c6aade6217d38977b7001fcbeb32123be50a

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

Filesize
344B

MD5
e4f184c32b8a3e2067d46ece2a482146

SHA1
71bd921b00f8190937b064d7f6741d7dab26ace5

SHA256
71612d659f893f1805bf2d00b02296dace03546e524d01bc0ca7def440626689

SHA512
30f65ff326f01c47a708d400cea3ec8c793aba435092f298fa4d3f354ea787ad8839ce388782a19704f49fa3e2816537d107f4f959c25a4fd3fe392c300866cd

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

Filesize
392B

MD5
99b3003a9a90b9767b92d792bb94b45b

SHA1
b7012f192099c0f9a104e32e4d8e471eafe5792d

SHA256
efc5fe4f6b3296e26682e20d4b1467e8b41b52c03c5b557783e85c3d68a90af0

SHA512
010779b51844a2e67ed1273cc8274ea828df866c129224c02563c07590aa9483a7fd9240f678ef20677d2a13ee1a40a095919d8becece5da40336effd72e9900

Download Submit
C:\Users\Admin\AppData\Local\8e128e0a-6551-4232-9070-57ef52d9cbc9\ef1a068842499608f3176406f4bada90_NEAS.exe

Filesize
773KB

MD5
ef1a068842499608f3176406f4bada90

SHA1
644ad7404c4af0e9c03ed3cda8122f9d966e6c77

SHA256
e8e4e7c6cb617626608bec2c76580609516939a94f58a7de0ba42facc5e30aae

SHA512
d7670ddb8c9de4a44c775dcbb1f2a037e73367a4af2a8e7d6450e687ea7dbc54cececb6f90f2e9986c214b6c25be37e00973abcb9b06199cf9600798f72e1c9f

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cab1F24.tmp

Filesize
65KB

MD5
ac05d27423a85adc1622c714f2cb6184

SHA1
b0fe2b1abddb97837ea0195be70ab2ff14d43198

SHA256
c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

SHA512
6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

Download Submit
memory/2180-44-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2180-46-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2180-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2180-53-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2180-49-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2180-52-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2180-51-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2180-45-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2732-28-0x0000000000320000-0x00000000003B1000-memory.dmp

Filesize
580KB

Download
memory/2916-4-0x0000000000220000-0x00000000002B1000-memory.dmp

Filesize
580KB

Download
memory/2916-5-0x0000000001A90000-0x0000000001BAB000-memory.dmp

Filesize
1.1MB

Download
memory/2916-0-0x0000000000220000-0x00000000002B1000-memory.dmp

Filesize
580KB

Download
memory/3020-7-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3020-1-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/3020-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3020-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3020-8-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download