djvu | 4692ef62991ef98b0b34256130cdf46202bdbd559dce6358b91db055f8d81682

General

Target

a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe
Size

814KB
MD5

7957a57c6a09cb2feafd220bf7b5837d
SHA1

f3af4907604329c3779725cc81731c3e5f8d7f96
SHA256

a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda
SHA512

a70e74ab3d63b5b6838eeee59847b125e34ab4f98cb9ba36f44be47c35db51a745c60efca300fe12bf16ff61d7e1ccaa0453291d008bb0ba9576b349169ba45d
SSDEEP

24576:EHi7xO7FSmvgF8MVWwYwLubiX8R7INJBnU:J60m+WwhDs7aU

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://acacaca.org/test1/get.php

Attributes

extension
.vvew
offline_id
rE5LpDv2ftYRXAo7bC18EpzfRMTHSGjgfyIMfZt1
payload_url
http://rgyui.top/dl/build2.exe

http://acacaca.org/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. You can get and look video overview decrypt tool: https://we.tl/t-QsoSRIeAK6 Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. 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: 0530Jhyjd

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 18 IoCs

resource	yara_rule
behavioral2/memory/3472-2-0x0000000002420000-0x000000000253B000-memory.dmp	family_djvu
behavioral2/memory/5108-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5108-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5108-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5108-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5108-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3676-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3676-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3676-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3676-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3676-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3676-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3676-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3676-45-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3676-48-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3676-47-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3676-49-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3676-50-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
Djvu family
djvu

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3116	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-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\b4c94007-a906-4076-ba4c-f6a52903a9d8\\a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe\" --AutoStart"	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.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
11	api.2ip.ua
12	api.2ip.ua
21	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3472 set thread context of 5108	3472	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe	83
PID 1144 set thread context of 3676	1144	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe	88

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5108	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe
5108	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe
3676	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe
3676	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3472 wrote to memory of 5108	3472	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe	83
PID 3472 wrote to memory of 5108	3472	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe	83
PID 3472 wrote to memory of 5108	3472	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe	83
PID 3472 wrote to memory of 5108	3472	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe	83
PID 3472 wrote to memory of 5108	3472	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe	83
PID 3472 wrote to memory of 5108	3472	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe	83
PID 3472 wrote to memory of 5108	3472	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe	83
PID 3472 wrote to memory of 5108	3472	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe	83
PID 3472 wrote to memory of 5108	3472	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe	83
PID 3472 wrote to memory of 5108	3472	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe	83
PID 5108 wrote to memory of 3116	5108	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe	84
PID 5108 wrote to memory of 3116	5108	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe	84
PID 5108 wrote to memory of 3116	5108	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe	84
PID 5108 wrote to memory of 1144	5108	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe	85
PID 5108 wrote to memory of 1144	5108	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe	85
PID 5108 wrote to memory of 1144	5108	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe	85
PID 1144 wrote to memory of 3676	1144	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe	88
PID 1144 wrote to memory of 3676	1144	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe	88
PID 1144 wrote to memory of 3676	1144	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe	88
PID 1144 wrote to memory of 3676	1144	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe	88
PID 1144 wrote to memory of 3676	1144	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe	88
PID 1144 wrote to memory of 3676	1144	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe	88
PID 1144 wrote to memory of 3676	1144	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe	88
PID 1144 wrote to memory of 3676	1144	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe	88
PID 1144 wrote to memory of 3676	1144	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe	88
PID 1144 wrote to memory of 3676	1144	a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe	88

C:\Users\Admin\AppData\Local\Temp\a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe
"C:\Users\Admin\AppData\Local\Temp\a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3472
- C:\Users\Admin\AppData\Local\Temp\a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe
  "C:\Users\Admin\AppData\Local\Temp\a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:5108
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\b4c94007-a906-4076-ba4c-f6a52903a9d8" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:3116
- - C:\Users\Admin\AppData\Local\Temp\a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe
    "C:\Users\Admin\AppData\Local\Temp\a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1144
  - - C:\Users\Admin\AppData\Local\Temp\a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe
      "C:\Users\Admin\AppData\Local\Temp\a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:3676

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

File and Directory Permissions Modification

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12

Filesize
1KB

MD5
67e486b2f148a3fca863728242b6273e

SHA1
452a84c183d7ea5b7c015b597e94af8eef66d44a

SHA256
facaf1c3a4bf232abce19a2d534e495b0d3adc7dbe3797d336249aa6f70adcfb

SHA512
d3a37da3bb10a9736dc03e8b2b49baceef5d73c026e2077b8ebc1b786f2c9b2f807e0aa13a5866cf3b3cafd2bc506242ef139c423eaffb050bbb87773e53881e

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8

Filesize
436B

MD5
971c514f84bba0785f80aa1c23edfd79

SHA1
732acea710a87530c6b08ecdf32a110d254a54c8

SHA256
f157ed17fcaf8837fa82f8b69973848c9b10a02636848f995698212a08f31895

SHA512
43dc1425d80e170c645a3e3bb56da8c3acd31bd637329e9e37094ac346ac85434df4edcdbefc05ae00aea33a80a88e2af695997a495611217fe6706075a63c58

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12

Filesize
174B

MD5
b89d4605d6df86fec83f9e96905b3d12

SHA1
c17f7e908f50a7940f13b213032e3d4ced087b98

SHA256
c998818edbb960c0088cf0a4848df464b260e29991d9d7248a774f2743a499d4

SHA512
f9aa0339bcd9f55a08d7a2b3e7bc8dfb65737b96a50171ecad2f3bff55064f10edb097b715360603576ae4f69991d0bcf09ec5670091034107ea267fb65f8f0e

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8

Filesize
170B

MD5
cb65b3737a442bbb4c5857fe102c6456

SHA1
ab80fbabff22d7fb174b83f8a66615a6e12326ad

SHA256
8205abba081dcfd08b6ed0ca489d8f1cb9a8ec35fa75246ac65579baa9fa1273

SHA512
473f79b49bf3fabee0f975f7e4d5c2c0226c022eb62ed04443ab1ddf79b89bf715e34641dae0526ef1644c79a8efa01052bbc7048cfeaeebe30a48b3b02cc019

Download Submit
C:\Users\Admin\AppData\Local\b4c94007-a906-4076-ba4c-f6a52903a9d8\a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda.exe

Filesize
814KB

MD5
7957a57c6a09cb2feafd220bf7b5837d

SHA1
f3af4907604329c3779725cc81731c3e5f8d7f96

SHA256
a33c16fe3207c333632d2698d07e9a92d55be5305a6a8047df339dd255cb4eda

SHA512
a70e74ab3d63b5b6838eeee59847b125e34ab4f98cb9ba36f44be47c35db51a745c60efca300fe12bf16ff61d7e1ccaa0453291d008bb0ba9576b349169ba45d

Download Submit
memory/1144-23-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download
memory/1144-19-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download
memory/3472-2-0x0000000002420000-0x000000000253B000-memory.dmp

Filesize
1.1MB

Download
memory/3472-1-0x0000000002260000-0x00000000022FF000-memory.dmp

Filesize
636KB

Download
memory/3676-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3676-48-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3676-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3676-50-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3676-49-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3676-47-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3676-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3676-45-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3676-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3676-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3676-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3676-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5108-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5108-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5108-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5108-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5108-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads