djvu | 350c038a1e1d9c2eed1f94fac6f7cab62266bffe9c26c7d7387f27d69c378b42

General

Target

sample.exe
Size

824KB
MD5

24c8011aeb1714e43f7eea47dbfa1daa
SHA1

44012799fcfd02ac89a4469a047c72f3bb9485ba
SHA256

eb7decebf8226f98cd64580f6ab6d001ddf7dc1c7cd28cd3c6175c505b13dc2f
SHA512

d771c86573f5051610e3bc14030614df56741fa1c2bdd3304a5088e99335b9fb2cada32d8f3d43dce74f12eba3e8946206247f480c0f06d7d516f700759fa9ee
SSDEEP

24576:SvlXzMoyhMQZF4w/ZR+B3OG+FSyHQiA/tB:4ljMoerFRa+GmvHQiA

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://fuyt.org/test3/get.php

Attributes

extension
.ygvb
offline_id
PfLhykvDxmCghCq8peuxBtQ3c0QBuANi8WUkuet1
payload_url
http://zerit.top/dl/build2.exe

http://fuyt.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-c565B1ILoZ 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: 0452Jbdio

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 18 IoCs

resource	yara_rule
behavioral2/memory/4480-2-0x0000000002290000-0x00000000023AB000-memory.dmp	family_djvu
behavioral2/memory/3096-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3096-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3096-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3096-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3096-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3624-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3624-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3624-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3624-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3624-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3624-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3624-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3624-42-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3624-45-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3624-44-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3624-46-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3624-47-0x0000000000400000-0x0000000000537000-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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	sample.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4856	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-1-5-21-4089630652-1596403869-279772308-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\52612302-dc39-4cfd-aaaa-b85652872ec3\\sample.exe\" --AutoStart"	sample.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
9	api.2ip.ua
10	api.2ip.ua
19	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4480 set thread context of 3096	4480	sample.exe	82
PID 4564 set thread context of 3624	4564	sample.exe	86

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	sample.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sample.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sample.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sample.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3096	sample.exe
3096	sample.exe
3624	sample.exe
3624	sample.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4480 wrote to memory of 3096	4480	sample.exe	82
PID 4480 wrote to memory of 3096	4480	sample.exe	82
PID 4480 wrote to memory of 3096	4480	sample.exe	82
PID 4480 wrote to memory of 3096	4480	sample.exe	82
PID 4480 wrote to memory of 3096	4480	sample.exe	82
PID 4480 wrote to memory of 3096	4480	sample.exe	82
PID 4480 wrote to memory of 3096	4480	sample.exe	82
PID 4480 wrote to memory of 3096	4480	sample.exe	82
PID 4480 wrote to memory of 3096	4480	sample.exe	82
PID 4480 wrote to memory of 3096	4480	sample.exe	82
PID 3096 wrote to memory of 4856	3096	sample.exe	83
PID 3096 wrote to memory of 4856	3096	sample.exe	83
PID 3096 wrote to memory of 4856	3096	sample.exe	83
PID 3096 wrote to memory of 4564	3096	sample.exe	84
PID 3096 wrote to memory of 4564	3096	sample.exe	84
PID 3096 wrote to memory of 4564	3096	sample.exe	84
PID 4564 wrote to memory of 3624	4564	sample.exe	86
PID 4564 wrote to memory of 3624	4564	sample.exe	86
PID 4564 wrote to memory of 3624	4564	sample.exe	86
PID 4564 wrote to memory of 3624	4564	sample.exe	86
PID 4564 wrote to memory of 3624	4564	sample.exe	86
PID 4564 wrote to memory of 3624	4564	sample.exe	86
PID 4564 wrote to memory of 3624	4564	sample.exe	86
PID 4564 wrote to memory of 3624	4564	sample.exe	86
PID 4564 wrote to memory of 3624	4564	sample.exe	86
PID 4564 wrote to memory of 3624	4564	sample.exe	86

C:\Users\Admin\AppData\Local\Temp\sample.exe
"C:\Users\Admin\AppData\Local\Temp\sample.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4480
- C:\Users\Admin\AppData\Local\Temp\sample.exe
  "C:\Users\Admin\AppData\Local\Temp\sample.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:3096
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\52612302-dc39-4cfd-aaaa-b85652872ec3" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:4856
- - C:\Users\Admin\AppData\Local\Temp\sample.exe
    "C:\Users\Admin\AppData\Local\Temp\sample.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4564
  - - C:\Users\Admin\AppData\Local\Temp\sample.exe
      "C:\Users\Admin\AppData\Local\Temp\sample.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:3624

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
fbf9af5e06718ff3ac8caf14c41e4c4f

SHA1
dcfd527bb878727f12cff4d77a6aa8beb14961fe

SHA256
fc3946b1858bd7e857ee5c7a761f73a458ccdd8bd46f567f3a47a199add71507

SHA512
f519aeadb27e6179884baa5169f2b06d382b1011e0b82fa4e5b8db63855ee69c8eccdc16de786facf66839b84770ec261e240ed71f0202e9eb0a1a9ac504e248

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

Filesize
170B

MD5
b5222e0896540ad903326742c373096a

SHA1
6d1e4c14c479d810f8c224f56c3bf4dbf095b4b9

SHA256
ef67d014967b9ad7e322ce477f08d2d49fab4355f81967bf8403d139629f9828

SHA512
4d8bef2c3d04b37de40448461ae834d59720d60ec5d02c62672fa33d04806da42c283c1101452fb08cf84ae04c43b1915319d95aed3d3044af120ddbd2d05837

Download Submit
C:\Users\Admin\AppData\Local\52612302-dc39-4cfd-aaaa-b85652872ec3\sample.exe

Filesize
824KB

MD5
24c8011aeb1714e43f7eea47dbfa1daa

SHA1
44012799fcfd02ac89a4469a047c72f3bb9485ba

SHA256
eb7decebf8226f98cd64580f6ab6d001ddf7dc1c7cd28cd3c6175c505b13dc2f

SHA512
d771c86573f5051610e3bc14030614df56741fa1c2bdd3304a5088e99335b9fb2cada32d8f3d43dce74f12eba3e8946206247f480c0f06d7d516f700759fa9ee

Download Submit
memory/3096-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3096-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3096-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3096-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3096-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3624-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3624-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3624-47-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3624-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3624-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3624-46-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3624-44-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3624-45-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3624-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3624-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3624-39-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3624-42-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4480-2-0x0000000002290000-0x00000000023AB000-memory.dmp

Filesize
1.1MB

Download
memory/4480-1-0x0000000000960000-0x00000000009F4000-memory.dmp

Filesize
592KB

Download
memory/4564-23-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download
memory/4564-19-0x0000000000400000-0x00000000004D9000-memory.dmp

Filesize
868KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads