djvu | a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
07/05/2024, 19:54

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General

Target
a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe
Size 761KB
Sample240507-ymx4wafe39
SHA256 a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a
MD5 70c0f6a5b9098d14fe711128a767f4bd
SHA1 6bd2c00752f5d51eadd83860ed38ca12ad6ea567
SHA512 887c2f4c03c82f6071bb61d61f0463f5d7b3dddd53d77367aa49dfbd045ac44fa311923fcc1ae36f04f936010232032e904b608f201848ba93a59b35169b84a6
SSDEEP 12288:6HEEWlcsXwBbBOEhgVKS8cEVsa9m2HP37OocB5S5rhaGeAB9rL:6kEWlcsgeEhrLVsGP37OrATf
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.qepi
offline_id
jgILOjDrBgyzY4JmT3B2jDSyBmDPBruKk8bKs6t1
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/665ddae3fc3cd10bbaaa4350408b196920240504141005/4cae7e 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: 0867PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral1/memory/3932-2-0x0000000004870000-0x000000000498B000-memory.dmp	family_djvu
behavioral1/memory/2252-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2252-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2252-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2252-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2252-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3192-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3192-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3192-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3192-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3192-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3192-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3192-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3192-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3192-35-0x0000000000400000-0x0000000000537000-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-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3664	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-1-5-21-3906287020-2915474608-1755617787-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\8eddb2e0-30ec-4080-abee-02dd1285dfe2\\a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe\" --AutoStart"	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.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
30	api.2ip.ua
31	api.2ip.ua
36	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3932 set thread context of 2252	3932	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	88
PID 1116 set thread context of 3192	1116	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	97

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
2252	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe
2252	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe
3192	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe
3192	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3932 wrote to memory of 2252	3932	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	88
PID 3932 wrote to memory of 2252	3932	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	88
PID 3932 wrote to memory of 2252	3932	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	88
PID 3932 wrote to memory of 2252	3932	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	88
PID 3932 wrote to memory of 2252	3932	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	88
PID 3932 wrote to memory of 2252	3932	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	88
PID 3932 wrote to memory of 2252	3932	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	88
PID 3932 wrote to memory of 2252	3932	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	88
PID 3932 wrote to memory of 2252	3932	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	88
PID 3932 wrote to memory of 2252	3932	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	88
PID 2252 wrote to memory of 3664	2252	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	92
PID 2252 wrote to memory of 3664	2252	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	92
PID 2252 wrote to memory of 3664	2252	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	92
PID 2252 wrote to memory of 1116	2252	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	94
PID 2252 wrote to memory of 1116	2252	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	94
PID 2252 wrote to memory of 1116	2252	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	94
PID 1116 wrote to memory of 3192	1116	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	97
PID 1116 wrote to memory of 3192	1116	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	97
PID 1116 wrote to memory of 3192	1116	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	97
PID 1116 wrote to memory of 3192	1116	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	97
PID 1116 wrote to memory of 3192	1116	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	97
PID 1116 wrote to memory of 3192	1116	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	97
PID 1116 wrote to memory of 3192	1116	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	97
PID 1116 wrote to memory of 3192	1116	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	97
PID 1116 wrote to memory of 3192	1116	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	97
PID 1116 wrote to memory of 3192	1116	a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe	97

C:\Users\Admin\AppData\Local\Temp\a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe
"C:\Users\Admin\AppData\Local\Temp\a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3932
- C:\Users\Admin\AppData\Local\Temp\a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe
  "C:\Users\Admin\AppData\Local\Temp\a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2252
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\8eddb2e0-30ec-4080-abee-02dd1285dfe2" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3664
- - C:\Users\Admin\AppData\Local\Temp\a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe
    "C:\Users\Admin\AppData\Local\Temp\a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1116
  - - C:\Users\Admin\AppData\Local\Temp\a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe
      "C:\Users\Admin\AppData\Local\Temp\a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:3192

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 26f7df2742be7eae0cecb3954ab69d2f1ad25c6b63a21e3a477ea34dee8301ae
MD5 af14424bd91fa356e225129fe451aacc
SHA1 4046dc95051bf8382196ff1fec36326c22dc1aae
SHA512 362068ce189ee00c318b574ebc8fc4f2e09add21f6c79aea8fe2f69ece44c0beaeb6c7fec7297a0b758ea5b8879ab0e9993c74ab262e200e289c05833e734179
MD5 SHA1 SHA512

Submit Download

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 861ec651fcb4e0ee6b90eb5915b30856ff38a22ba56d232b136c77ec389676a0
MD5 a78cc506e40b807d68bdc9a99012e429
SHA1 845be14b310caed2d853925d8cb9a21f80e1426d
SHA512 9ebf628e9d6d7f207438101e83eb99efdc8a69d85d3f93d79f64084dce9409dde3df44f3fb1f0b185ddc432ba55654e9d477f0f857050ac594b2ed8fc533803e
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 53a10a814dbef5955d6a8105cdb01a820adf3ee6da2c042a8a4ffdddbd9186c9
MD5 fc6664f57d9eb807264e417bddc5eec8
SHA1 ee912ce63e18a915e1315acc30213ab05a3f10fe
SHA512 847a9bf6cf5d3492c3f98ca0cec23e39d48020825252d9061843a3eb61c84632b0417e09b4b1befafe2a17f05c58e277f92a35b714b9c6728affb68946f77ec2
MD5 SHA1 SHA512

Submit Download

a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe

Path C:\Users\Admin\AppData\Local\8eddb2e0-30ec-4080-abee-02dd1285dfe2\a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a.exe
Size 761KB
SHA256 a5a8baff61b678909baa327e4ea6b71fd6514b64b9087571da55b265208a0a7a
MD5 70c0f6a5b9098d14fe711128a767f4bd
SHA1 6bd2c00752f5d51eadd83860ed38ca12ad6ea567
SHA512 887c2f4c03c82f6071bb61d61f0463f5d7b3dddd53d77367aa49dfbd045ac44fa311923fcc1ae36f04f936010232032e904b608f201848ba93a59b35169b84a6
SSDEEP 12288:6HEEWlcsXwBbBOEhgVKS8cEVsa9m2HP37OocB5S5rhaGeAB9rL:6kEWlcsgeEhrLVsGP37OrATf
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2252-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2252-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2252-17-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2252-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2252-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3192-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3192-20-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3192-25-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3192-26-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3192-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3192-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3192-33-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3192-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3192-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3932-2-0x0000000004870000-0x000000000498B000-memory.dmp

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memory/3932-1-0x0000000002D70000-0x0000000002E05000-memory.dmp

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