djvu | 8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
25/04/2024, 01:44

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General

Target
8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe
Size 763KB
Sample240425-b54m2sda83
SHA256 8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c
MD5 19f46c713419f534c1532645b764c7b4
SHA1 f61f07d60704ff3d843596a6068b12f565bbed23
SHA512 595bad474662dd1e1cdbdec310c96b42201443d07c975a96c8d0bddb6f08714b55383aec213106424201be6304e7c620e696c54ee70ff8027c11f1cf129a08f4
SSDEEP 12288:Ck30NbksICSr1WWknJ7RHWaqrx3A4VpRZZTLpu02zSa8wQR1oFqVDNmw/oI9wIG:kksIjr1EJ7R2aqN3zbFTM02zFW1TDLiz
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.bgjs
offline_id
Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1
payload_url
http://sdfjhuz.com/dl/build2.exe

http://cajgtus.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. Do not ask assistants from youtube and recovery data sites for help in recovering your data. They can use your free decryption quota and scam you. Our contact is emails in this text document only. You can get and look video overview decrypt tool: https://wetransfer.com/downloads/54cdfd152fe98eedb628a1f4ddb7076420240421150208/403a27 Price of private key and decrypt software is $999. Discount 50% available if you contact us first 72 hours, that's price for you is $499. 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: 0863PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

resource	yara_rule
behavioral2/memory/1932-2-0x0000000005EA0000-0x0000000005FBB000-memory.dmp	family_djvu
behavioral2/memory/1636-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1636-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1636-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1636-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1636-15-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2824-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2824-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2824-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2824-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2824-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2824-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2824-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2824-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2824-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2824-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2824-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware 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-1-5-21-4084619521-2220719027-1909462854-1000\Control Panel\International\Geo\Nation	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1176	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-1-5-21-4084619521-2220719027-1909462854-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\f638b6d2-3dd0-48c3-aae9-de59b78ab2e3\\8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe\" --AutoStart"	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.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
8	api.2ip.ua
10	api.2ip.ua
29	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1932 set thread context of 1636	1932	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	85
PID 3560 set thread context of 2824	3560	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	93

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1636	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe
1636	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe
2824	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe
2824	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1932 wrote to memory of 1636	1932	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	85
PID 1932 wrote to memory of 1636	1932	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	85
PID 1932 wrote to memory of 1636	1932	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	85
PID 1932 wrote to memory of 1636	1932	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	85
PID 1932 wrote to memory of 1636	1932	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	85
PID 1932 wrote to memory of 1636	1932	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	85
PID 1932 wrote to memory of 1636	1932	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	85
PID 1932 wrote to memory of 1636	1932	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	85
PID 1932 wrote to memory of 1636	1932	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	85
PID 1932 wrote to memory of 1636	1932	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	85
PID 1636 wrote to memory of 1176	1636	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	89
PID 1636 wrote to memory of 1176	1636	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	89
PID 1636 wrote to memory of 1176	1636	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	89
PID 1636 wrote to memory of 3560	1636	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	91
PID 1636 wrote to memory of 3560	1636	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	91
PID 1636 wrote to memory of 3560	1636	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	91
PID 3560 wrote to memory of 2824	3560	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	93
PID 3560 wrote to memory of 2824	3560	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	93
PID 3560 wrote to memory of 2824	3560	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	93
PID 3560 wrote to memory of 2824	3560	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	93
PID 3560 wrote to memory of 2824	3560	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	93
PID 3560 wrote to memory of 2824	3560	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	93
PID 3560 wrote to memory of 2824	3560	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	93
PID 3560 wrote to memory of 2824	3560	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	93
PID 3560 wrote to memory of 2824	3560	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	93
PID 3560 wrote to memory of 2824	3560	8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe	93

C:\Users\Admin\AppData\Local\Temp\8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe
"C:\Users\Admin\AppData\Local\Temp\8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1932
- C:\Users\Admin\AppData\Local\Temp\8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe
  "C:\Users\Admin\AppData\Local\Temp\8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1636
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\f638b6d2-3dd0-48c3-aae9-de59b78ab2e3" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1176
- - C:\Users\Admin\AppData\Local\Temp\8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe
    "C:\Users\Admin\AppData\Local\Temp\8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3560
  - - C:\Users\Admin\AppData\Local\Temp\8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe
      "C:\Users\Admin\AppData\Local\Temp\8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2824

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

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Downloads

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 1KB
SHA256 a7760866eaf849b079815652f9dce9eb9ec7c599199bc65c7030ca9e2ed91c26
MD5 f8ed6292d6d2f9514668acec50849d17
SHA1 482745d97c48b32fd986e488d169ac4eb7edd737
SHA512 ebc265c4a27c4a1d14ef783b28f3cb0de9ca4f28795078c3d80bf2ec6574c4e8f3f3c7c68197b1ea6f037cb88268cfab99817660f442696167120bc6275cad4f
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 724B
SHA256 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
MD5 8202a1cd02e7d69597995cabbe881a12
SHA1 8858d9d934b7aa9330ee73de6c476acf19929ff6
SHA512 97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9
MD5 SHA1 SHA512

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24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 410B
SHA256 808e91bf7675ed10f98026bf2ff7b8cf93581b9d5e1cefaa435e4e6bcd0605fd
MD5 d72e7eaa161773ed0d52d06a994a966e
SHA1 d3600b282fba79ec2dd9fcc501dd6ff86db6f786
SHA512 1d7a4421233ac167c86d8177704dc0d2f77da378f2e446bc1bb2b08d1fe6a5076a425865b652d955eeefb024d66485d4ce6327fe3c245353663598a32d1ece69
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 ea07060038a5b0f5c37dfd7ccb3a0b34eb47231b975a983ad560a39bab240153
MD5 36f259ce73c315a9032a3838c6aec8da
SHA1 af3e4bcaca5d3c30d2e0b0a3d1745f3182b3472a
SHA512 24003eaf9d564118f5b43fcb78a092ebfb8120c9ee06824db3163ad7741d99251f9e6c2f014f85c89827e512145712a4cd450524359b336ed3ab68136e9f20c3
MD5 SHA1 SHA512

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8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe

Path C:\Users\Admin\AppData\Local\f638b6d2-3dd0-48c3-aae9-de59b78ab2e3\8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c.exe
Size 763KB
SHA256 8b7851ae383ee5e1d106322f99d0a6149044e317ed310ce7464ff7d82afa725c
MD5 19f46c713419f534c1532645b764c7b4
SHA1 f61f07d60704ff3d843596a6068b12f565bbed23
SHA512 595bad474662dd1e1cdbdec310c96b42201443d07c975a96c8d0bddb6f08714b55383aec213106424201be6304e7c620e696c54ee70ff8027c11f1cf129a08f4
SSDEEP 12288:Ck30NbksICSr1WWknJ7RHWaqrx3A4VpRZZTLpu02zSa8wQR1oFqVDNmw/oI9wIG:kksIjr1EJ7R2aqN3zbFTM02zFW1TDLiz
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1636-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1636-15-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1636-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1636-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1636-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1932-1-0x0000000004660000-0x00000000046F7000-memory.dmp

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memory/1932-2-0x0000000005EA0000-0x0000000005FBB000-memory.dmp

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memory/2824-20-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2824-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2824-21-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2824-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2824-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2824-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2824-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2824-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2824-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2824-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2824-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3560-18-0x0000000004470000-0x000000000450D000-memory.dmp

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