djvu | b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d

Analysis

max time kernel
145s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20231127-en
resource tags

arch:x64arch:x86image:win10v2004-20231127-enlocale:en-usos:windows10-2004-x64system
submitted
12/12/2023, 13:43

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General

Target

b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe
Size

755KB
MD5

0c48c222423feb7b61203168e7a38719
SHA1

8b6936e5b72cf4924f3d8f8daf033e15075b2819
SHA256

b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d
SHA512

88f03dfc1771371ed83025d5ad1f4e28df507051a162334435fbad020c8505271f6ad22de226434dba20d32f17d91b21f9420519839a1977692c8c31e29d4da4
SSDEEP

12288:t5/d1/kBmxX7MjCdHRn3K8OyQy2KguyVcNWw7fhfUsmDBpfvi0RV0:tP1/kAKCdHRn3PO3y2KguGcNpfhfUsmY

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://zexeq.com/test1/get.php

Attributes

extension
.hhuy
offline_id
gG3wF8nDWRqLztkHPAxMzpvNVlmLBMgQKmKiCNt1
payload_url
http://brusuax.com/dl/build2.exe

http://zexeq.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. You can get and look video overview decrypt tool: https://we.tl/t-5zKXJl7cwi 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: 0834ASdw

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 16 IoCs

resource	yara_rule
behavioral1/memory/5104-2-0x0000000002740000-0x000000000285B000-memory.dmp	family_djvu
behavioral1/memory/1524-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1524-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1524-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1524-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1524-15-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3744-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3744-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3744-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3744-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3744-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3744-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3744-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3744-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3744-54-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3744-69-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
Downloads MZ/PE file

Checks computer location settings 2 TTPs 2 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-1-5-21-2013768333-4045878716-2922883000-1000\Control Panel\International\Geo\Nation	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2013768333-4045878716-2922883000-1000\Control Panel\International\Geo\Nation	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe

Executes dropped EXE 2 IoCs

pid	Process
4080	build2.exe
2380	build2.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4024	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-1-5-21-2013768333-4045878716-2922883000-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\f1e632e1-0bad-49ec-8046-fa709da14a78\\b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe\" --AutoStart"	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.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
15	api.2ip.ua
16	api.2ip.ua
42	api.2ip.ua

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 5104 set thread context of 1524	5104	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe	89
PID 3524 set thread context of 3744	3524	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe	96
PID 4080 set thread context of 2380	4080	build2.exe	106

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2604	2380	WerFault.exe	106

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1524	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe
1524	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe
3744	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe
3744	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe

Suspicious use of WriteProcessMemory 38 IoCs

description	pid	Process	procid_target
PID 5104 wrote to memory of 1524	5104	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe	89
PID 5104 wrote to memory of 1524	5104	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe	89
PID 5104 wrote to memory of 1524	5104	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe	89
PID 5104 wrote to memory of 1524	5104	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe	89
PID 5104 wrote to memory of 1524	5104	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe	89
PID 5104 wrote to memory of 1524	5104	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe	89
PID 5104 wrote to memory of 1524	5104	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe	89
PID 5104 wrote to memory of 1524	5104	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe	89
PID 5104 wrote to memory of 1524	5104	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe	89
PID 5104 wrote to memory of 1524	5104	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe	89
PID 1524 wrote to memory of 4024	1524	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe	90
PID 1524 wrote to memory of 4024	1524	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe	90
PID 1524 wrote to memory of 4024	1524	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe	90
PID 1524 wrote to memory of 3524	1524	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe	91
PID 1524 wrote to memory of 3524	1524	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe	91
PID 1524 wrote to memory of 3524	1524	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe	91
PID 3524 wrote to memory of 3744	3524	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe	96
PID 3524 wrote to memory of 3744	3524	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe	96
PID 3524 wrote to memory of 3744	3524	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe	96
PID 3524 wrote to memory of 3744	3524	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe	96
PID 3524 wrote to memory of 3744	3524	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe	96
PID 3524 wrote to memory of 3744	3524	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe	96
PID 3524 wrote to memory of 3744	3524	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe	96
PID 3524 wrote to memory of 3744	3524	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe	96
PID 3524 wrote to memory of 3744	3524	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe	96
PID 3524 wrote to memory of 3744	3524	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe	96
PID 3744 wrote to memory of 4080	3744	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe	105
PID 3744 wrote to memory of 4080	3744	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe	105
PID 3744 wrote to memory of 4080	3744	b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe	105
PID 4080 wrote to memory of 2380	4080	build2.exe	106
PID 4080 wrote to memory of 2380	4080	build2.exe	106
PID 4080 wrote to memory of 2380	4080	build2.exe	106
PID 4080 wrote to memory of 2380	4080	build2.exe	106
PID 4080 wrote to memory of 2380	4080	build2.exe	106
PID 4080 wrote to memory of 2380	4080	build2.exe	106
PID 4080 wrote to memory of 2380	4080	build2.exe	106
PID 4080 wrote to memory of 2380	4080	build2.exe	106
PID 4080 wrote to memory of 2380	4080	build2.exe	106

C:\Users\Admin\AppData\Local\Temp\b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe
"C:\Users\Admin\AppData\Local\Temp\b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5104
- C:\Users\Admin\AppData\Local\Temp\b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe
  "C:\Users\Admin\AppData\Local\Temp\b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1524
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\f1e632e1-0bad-49ec-8046-fa709da14a78" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4024
- - C:\Users\Admin\AppData\Local\Temp\b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe
    "C:\Users\Admin\AppData\Local\Temp\b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3524
  - - C:\Users\Admin\AppData\Local\Temp\b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe
      "C:\Users\Admin\AppData\Local\Temp\b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Checks computer location settings
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of WriteProcessMemory
      PID:3744
    - - C:\Users\Admin\AppData\Local\e9f04fb6-b2d1-4762-8c43-8ef753bb80e6\build2.exe
        
        "C:\Users\Admin\AppData\Local\e9f04fb6-b2d1-4762-8c43-8ef753bb80e6\build2.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of SetThreadContext
        Suspicious use of WriteProcessMemory
        
        PID:4080
      - C:\Users\Admin\AppData\Local\e9f04fb6-b2d1-4762-8c43-8ef753bb80e6\build2.exe
        
        "C:\Users\Admin\AppData\Local\e9f04fb6-b2d1-4762-8c43-8ef753bb80e6\build2.exe"
        6⤵
        Executes dropped EXE
        
        PID:2380
        
        C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 2380 -s 2116
        7⤵
        Program crash
        
        PID:2604

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 2380 -ip 2380
1⤵
PID:436

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

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Filesize
1KB

MD5
ef5eacef00175aa65de8fb92c9a48cf8

SHA1
8518ea998c6f561f538aad051219eea5538741ec

SHA256
2f2d987db9bcd908f25cb407b8c39d24678b5d2ce3427a51f223d6a1893a7297

SHA512
ce0c0ba01028c27bd6d5222562054afe9d08893320e787fa789f60213b94ff23a0f5bdd25ca8f48a298260071d9a9b73eb9be7b0695e1a75808d5461e4ab6dd3

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
a57ff00e27037881a35bf4fe6e100837

SHA1
1859723564a64a9178ae312ff38c791149d49ff4

SHA256
4b3429d8e04fa00a18aa44a12d5d8baf71698dd95611cc3415cc36f7daf53c2c

SHA512
48dfbbe589aa6b116ab1315508a7c0f1e24934028dd6ecb14583bc77aa7a5a7d0cda5ee093d975b86ffa8274006203d2e4107ba40c3deb216b50bca94a1ba3da

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

Filesize
392B

MD5
77c4377cb8c413857b05e1893906a26d

SHA1
c94e490559ed40783a1c72c96b173d12f0b7ee18

SHA256
716fd45ac466148b5d1e86164e0c23b75ffb55dc18a5169beb3bdb90daa66330

SHA512
196df96726c4ab0a1885ab4424c21c9045ff163ba2bab6ab1ff244a0303c256a43f9ace18e9fbde1dc9cbc143f19d9faa61e0fb443bedb2bab57ef7cba4e0111

Download Submit
C:\Users\Admin\AppData\Local\e9f04fb6-b2d1-4762-8c43-8ef753bb80e6\build2.exe

Filesize
192KB

MD5
2449def686158fff9801f567489d9c1f

SHA1
a26a611f6c8f43745d69a6138e07f8f32b09fa3f

SHA256
4230571aea510591a55384cedd110eb4c220014ccda30d2d7018dcee89c7770b

SHA512
9fe324902e5c31e6db664b40074ffcc03cd1c13606e9e6c4e156e71cb89d1e234477454df3debbccfe5b9e2c88b52e6e8f7746832a6f2f4d4ad6a9eb0d75000b

Download Submit
C:\Users\Admin\AppData\Local\f1e632e1-0bad-49ec-8046-fa709da14a78\b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d.exe

Filesize
755KB

MD5
0c48c222423feb7b61203168e7a38719

SHA1
8b6936e5b72cf4924f3d8f8daf033e15075b2819

SHA256
b6adcae256ebf5341bea840bc37689e3eb86a63be1abf04c01ccbd428cddbd2d

SHA512
88f03dfc1771371ed83025d5ad1f4e28df507051a162334435fbad020c8505271f6ad22de226434dba20d32f17d91b21f9420519839a1977692c8c31e29d4da4

Download Submit
memory/1524-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1524-15-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1524-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1524-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1524-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2380-66-0x0000000000400000-0x000000000063F000-memory.dmp

Filesize
2.2MB

Download
memory/2380-53-0x0000000000400000-0x000000000063F000-memory.dmp

Filesize
2.2MB

Download
memory/2380-52-0x0000000000400000-0x000000000063F000-memory.dmp

Filesize
2.2MB

Download
memory/2380-47-0x0000000000400000-0x000000000063F000-memory.dmp

Filesize
2.2MB

Download
memory/3524-19-0x00000000025C0000-0x000000000265C000-memory.dmp

Filesize
624KB

Download
memory/3744-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3744-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3744-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3744-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3744-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3744-69-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3744-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3744-54-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3744-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3744-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4080-51-0x00000000009B0000-0x00000000009DB000-memory.dmp

Filesize
172KB

Download
memory/4080-50-0x0000000000A80000-0x0000000000B80000-memory.dmp

Filesize
1024KB

Download
memory/5104-2-0x0000000002740000-0x000000000285B000-memory.dmp

Filesize
1.1MB

Download
memory/5104-1-0x0000000002650000-0x00000000026ED000-memory.dmp

Filesize
628KB

Download