djvu | 54ae5f8e7f48ef0add9403ced9dbed4419f642e474278dc215cdd140077c1545

General

Target

28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe
Size

793KB
MD5

bb3a78f059d635fa48ffc3d7b5ee4a55
SHA1

3ee29a432ab0d44404429e33d4380f5ee940c2a1
SHA256

28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d
SHA512

2b9d2e359e6a8e7e7aa35593fabe7be4d4ab186ac214dd4e9a677b33856aec39c71340bfb6dcbfe6f5beacd251d1baa0b29e41706b75fd86dde50063fe649229
SSDEEP

12288:RM3xe1DtJUb9qNY4U4+em5Dn4MKC3tzmYroG+jhssJUzS0uL0pR6NubkVGgmto1:R0QDTQ0ixeMbtzmYMhN2zkgpR6hGg7

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.udla
offline_id
qwVQoIsE2xLety0oNWloOilSDuIBXJGK86LM3ot1
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-fnn5kv33Vv 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: 0435JIjdm

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 18 IoCs

resource	yara_rule
behavioral2/memory/5092-2-0x00000000023C0000-0x00000000024DB000-memory.dmp	family_djvu
behavioral2/memory/2408-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2408-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2408-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2408-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2408-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4364-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4364-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4364-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4364-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4364-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4364-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4364-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4364-42-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4364-45-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4364-44-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4364-46-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4364-47-0x0000000000400000-0x0000000000537000-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-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
816	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-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\cbcbbe0d-6578-435e-b34b-2614e785eb9c\\28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe\" --AutoStart"	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.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
17	api.2ip.ua
10	api.2ip.ua
11	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 5092 set thread context of 2408	5092	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe	82
PID 2484 set thread context of 4364	2484	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.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	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2408	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe
2408	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe
4364	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe
4364	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 5092 wrote to memory of 2408	5092	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe	82
PID 5092 wrote to memory of 2408	5092	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe	82
PID 5092 wrote to memory of 2408	5092	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe	82
PID 5092 wrote to memory of 2408	5092	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe	82
PID 5092 wrote to memory of 2408	5092	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe	82
PID 5092 wrote to memory of 2408	5092	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe	82
PID 5092 wrote to memory of 2408	5092	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe	82
PID 5092 wrote to memory of 2408	5092	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe	82
PID 5092 wrote to memory of 2408	5092	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe	82
PID 5092 wrote to memory of 2408	5092	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe	82
PID 2408 wrote to memory of 816	2408	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe	83
PID 2408 wrote to memory of 816	2408	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe	83
PID 2408 wrote to memory of 816	2408	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe	83
PID 2408 wrote to memory of 2484	2408	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe	84
PID 2408 wrote to memory of 2484	2408	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe	84
PID 2408 wrote to memory of 2484	2408	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe	84
PID 2484 wrote to memory of 4364	2484	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe	86
PID 2484 wrote to memory of 4364	2484	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe	86
PID 2484 wrote to memory of 4364	2484	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe	86
PID 2484 wrote to memory of 4364	2484	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe	86
PID 2484 wrote to memory of 4364	2484	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe	86
PID 2484 wrote to memory of 4364	2484	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe	86
PID 2484 wrote to memory of 4364	2484	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe	86
PID 2484 wrote to memory of 4364	2484	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe	86
PID 2484 wrote to memory of 4364	2484	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe	86
PID 2484 wrote to memory of 4364	2484	28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe	86

C:\Users\Admin\AppData\Local\Temp\28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe
"C:\Users\Admin\AppData\Local\Temp\28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5092
- C:\Users\Admin\AppData\Local\Temp\28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe
  "C:\Users\Admin\AppData\Local\Temp\28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.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:2408
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\cbcbbe0d-6578-435e-b34b-2614e785eb9c" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:816
- - C:\Users\Admin\AppData\Local\Temp\28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe
    "C:\Users\Admin\AppData\Local\Temp\28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2484
  - - C:\Users\Admin\AppData\Local\Temp\28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe
      "C:\Users\Admin\AppData\Local\Temp\28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:4364

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
9e7037e75ade11cbcfa1181e1cf011a7

SHA1
68c1ec8d2e5b8ae3aa12f9bf0ceffa48506f649e

SHA256
8ff927fc7998f921866d705a67a546b5cdde580b772bf1771310cda51189f30e

SHA512
ac7ae717ab4b12c9b0b915e0001af84431457d201f0218a117f9854d401d13baabdca2bbbd363193c6a3c008dc474ce102f9ce60143acc4ce19a0f0bc70153b8

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

Filesize
170B

MD5
a5bcd9482a81e6e2c449647c3fda1bd8

SHA1
277c9bf383ab26e98e6330c75cb37e76499df532

SHA256
44a3c9c6e2d4b309c7e14f910fc3693a080c67c71bcc45ea1a6a255d423737ae

SHA512
e274d9f293803e293a571dcdb4f255f7a82fabf2aef80e8d540f1d24509ab2b38fcb2ae3a5dc2c3940b41763d6c281586672cb4211fd6a40d759cb5338dacff9

Download Submit
C:\Users\Admin\AppData\Local\cbcbbe0d-6578-435e-b34b-2614e785eb9c\28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d.exe

Filesize
793KB

MD5
bb3a78f059d635fa48ffc3d7b5ee4a55

SHA1
3ee29a432ab0d44404429e33d4380f5ee940c2a1

SHA256
28ab91ea2d0e18a098cf8d26e786a7a477a98d6b0a6dcc1ec9e6e54395534b5d

SHA512
2b9d2e359e6a8e7e7aa35593fabe7be4d4ab186ac214dd4e9a677b33856aec39c71340bfb6dcbfe6f5beacd251d1baa0b29e41706b75fd86dde50063fe649229

Download Submit
memory/2408-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2408-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2408-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2408-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2408-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2484-19-0x0000000000400000-0x000000000050B000-memory.dmp

Filesize
1.0MB

Download
memory/2484-24-0x0000000000400000-0x000000000050B000-memory.dmp

Filesize
1.0MB

Download
memory/4364-23-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4364-45-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4364-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4364-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4364-47-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4364-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4364-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4364-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4364-39-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4364-42-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4364-46-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4364-44-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5092-1-0x00000000022B0000-0x0000000002349000-memory.dmp

Filesize
612KB

Download
memory/5092-2-0x00000000023C0000-0x00000000024DB000-memory.dmp

Filesize
1.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads