djvu | 4e55d2f399fd3b13f80f77ef214a2b2c328e57968ebad37c21be67f8ef0957a6

Analysis

max time kernel
144s
max time network
133s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
22/12/2024, 03:13

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General

Target

b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe
Size

761KB
MD5

d829a46501729b196b794f955aa69cc0
SHA1

20efd5be2d09c31001c7b107388a9aee76f41eea
SHA256

b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41
SHA512

1497087e6fc04c23043da0974db4cd98c4c77a1509f648b2e230f0a8f5727fae3c8dd463fb1d9cc1e7094fb9692c35630999f7c14c4c28b837dc6dd72e75d9ec
SSDEEP

12288:WvbhHdeD79q7DmMHUvJqHv/bpxwW4nnpdT0LHdVdjl8/e+7krnhOQUc4Mng/KWDi:E7eVSeJqPjQXnoLHdVdm/37kMQb4pKUi

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.ghas
offline_id
miqhSGmGE63yWs53FTz0fnp8eCARpnaYE3O3p2t1
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-0SLhZxAjRX 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: 0445JIjdm

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral1/memory/2676-2-0x0000000001DF0000-0x0000000001F0B000-memory.dmp	family_djvu
behavioral1/memory/1880-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1880-7-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1880-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1880-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2748-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2748-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2748-46-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2748-47-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2748-48-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2748-52-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2748-61-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2748-64-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2748-63-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2748-65-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

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

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2736	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-1-5-21-2039016743-699959520-214465309-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\6cb8e1d3-de1c-4284-9b1c-c63e719ee131\\b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe\" --AutoStart"	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.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
5	api.2ip.ua
9	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2676 set thread context of 1880	2676	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe	30
PID 2808 set thread context of 2748	2808	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe	34

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	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1880	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe
1880	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe
2748	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe
2748	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2676 wrote to memory of 1880	2676	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe	30
PID 2676 wrote to memory of 1880	2676	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe	30
PID 2676 wrote to memory of 1880	2676	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe	30
PID 2676 wrote to memory of 1880	2676	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe	30
PID 2676 wrote to memory of 1880	2676	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe	30
PID 2676 wrote to memory of 1880	2676	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe	30
PID 2676 wrote to memory of 1880	2676	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe	30
PID 2676 wrote to memory of 1880	2676	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe	30
PID 2676 wrote to memory of 1880	2676	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe	30
PID 2676 wrote to memory of 1880	2676	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe	30
PID 2676 wrote to memory of 1880	2676	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe	30
PID 1880 wrote to memory of 2736	1880	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe	32
PID 1880 wrote to memory of 2736	1880	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe	32
PID 1880 wrote to memory of 2736	1880	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe	32
PID 1880 wrote to memory of 2736	1880	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe	32
PID 1880 wrote to memory of 2808	1880	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe	33
PID 1880 wrote to memory of 2808	1880	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe	33
PID 1880 wrote to memory of 2808	1880	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe	33
PID 1880 wrote to memory of 2808	1880	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe	33
PID 2808 wrote to memory of 2748	2808	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe	34
PID 2808 wrote to memory of 2748	2808	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe	34
PID 2808 wrote to memory of 2748	2808	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe	34
PID 2808 wrote to memory of 2748	2808	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe	34
PID 2808 wrote to memory of 2748	2808	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe	34
PID 2808 wrote to memory of 2748	2808	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe	34
PID 2808 wrote to memory of 2748	2808	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe	34
PID 2808 wrote to memory of 2748	2808	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe	34
PID 2808 wrote to memory of 2748	2808	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe	34
PID 2808 wrote to memory of 2748	2808	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe	34
PID 2808 wrote to memory of 2748	2808	b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe	34

C:\Users\Admin\AppData\Local\Temp\b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe
"C:\Users\Admin\AppData\Local\Temp\b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2676
- C:\Users\Admin\AppData\Local\Temp\b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe
  "C:\Users\Admin\AppData\Local\Temp\b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe"
  2⤵
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1880
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\6cb8e1d3-de1c-4284-9b1c-c63e719ee131" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:2736
- - C:\Users\Admin\AppData\Local\Temp\b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe
    "C:\Users\Admin\AppData\Local\Temp\b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2808
  - - C:\Users\Admin\AppData\Local\Temp\b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe
      "C:\Users\Admin\AppData\Local\Temp\b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:2748

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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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
bb66dd57a431314511b698ea0b87cb5c

SHA1
239255d163f12f47e7c356d2eed46e67ac30b733

SHA256
41d831598a78a17389f83d6b48734b2660a354d21105392681bfd61861a59cb8

SHA512
0ce59466a62a862b7a96aa628d3e57c30466f28f920a2e0d59c88705ad6263de38430db44bb0c4b7687731737da30eed514514c67ee5b1b6e929f4ca2c5ba201

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

Filesize
170B

MD5
93c15de234c24702e8a334ff6cb8a4ca

SHA1
04812ddcb4bd07aa78d6343060274927c0a794eb

SHA256
d6773070254a62804f808dea270313a32cf0b7921f13eb9475b3d22c77f25b4c

SHA512
b155e4730a1923d3cd7366b813eee22330f7493eab6d8f674c60d40dc19bc79bff87a6e5bcd7e6f217cb752def4f175f3130f7738aa6b2438ab0e5643f63a0e7

Download Submit
C:\Users\Admin\AppData\Local\6cb8e1d3-de1c-4284-9b1c-c63e719ee131\b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41.exe

Filesize
761KB

MD5
d829a46501729b196b794f955aa69cc0

SHA1
20efd5be2d09c31001c7b107388a9aee76f41eea

SHA256
b7f005f78f4fa1f50156e6ce98373aef46ea5b594322ad146d14e892ef04ce41

SHA512
1497087e6fc04c23043da0974db4cd98c4c77a1509f648b2e230f0a8f5727fae3c8dd463fb1d9cc1e7094fb9692c35630999f7c14c4c28b837dc6dd72e75d9ec

Download Submit
C:\Users\Admin\AppData\Local\Temp\CabA90B.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
memory/1880-8-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1880-7-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1880-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1880-3-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1880-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2676-1-0x00000000002A0000-0x0000000000332000-memory.dmp

Filesize
584KB

Download
memory/2676-2-0x0000000001DF0000-0x0000000001F0B000-memory.dmp

Filesize
1.1MB

Download
memory/2676-0-0x00000000002A0000-0x0000000000332000-memory.dmp

Filesize
584KB

Download
memory/2748-33-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2748-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2748-46-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2748-47-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2748-48-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2748-52-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2748-61-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2748-64-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2748-63-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2748-65-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2808-31-0x0000000000400000-0x00000000004E6000-memory.dmp

Filesize
920KB

Download
memory/2808-27-0x0000000000400000-0x00000000004E6000-memory.dmp

Filesize
920KB

Download
memory/2808-26-0x0000000000220000-0x00000000002B2000-memory.dmp

Filesize
584KB

Download