djvu | 2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca

Analysis

max time kernel
299s
max time network
189s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
09/05/2024, 22:47

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General

Target
2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe
Size 761KB
Sample240509-2qmn4aba9z
SHA256 2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca
MD5 70d66d2739a98bcce16222b6e2cf9a10
SHA1 530e77cc54befb715f57669078680b25300859e6
SHA512 b0052a360eaf4179692f3dbe84b96bd06d4a7feba7ffe9e44502d008fa3ce06331593181ccd9a22bd88121e023ae55bd1f4db376e496a94f85b8ef3dcbd7c4ef
SSDEEP 12288:htuUbmhmjAFGEH/TaoVeScIPGLO0RpaW+pmkOaJrHyBSbt+RKRsp+5:htuoAVxHLaaz2hR4mkVs2sp+5
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://cajgtus.com/test2/get.php

Attributes

extension
.qehu
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: 0868PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 14 IoCs

resource	yara_rule
behavioral2/memory/2064-4-0x00000000048A0000-0x00000000049BB000-memory.dmp	family_djvu
behavioral2/memory/4904-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4904-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4904-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4904-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4904-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2240-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2240-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2240-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2240-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2240-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2240-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2240-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2240-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

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

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
920	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-1-5-21-873560699-1074803302-2326074425-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\a371e921-c194-44dc-9123-34b2ed4a213d\\2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe\" --AutoStart"	2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.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
1	api.2ip.ua
2	api.2ip.ua
11	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2064 set thread context of 4904	2064	2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe	73
PID 1216 set thread context of 2240	1216	2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe	77

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
4904	2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe
4904	2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe
2240	2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe
2240	2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2064 wrote to memory of 4904	2064	2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe	73
PID 2064 wrote to memory of 4904	2064	2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe	73
PID 2064 wrote to memory of 4904	2064	2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe	73
PID 2064 wrote to memory of 4904	2064	2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe	73
PID 2064 wrote to memory of 4904	2064	2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe	73
PID 2064 wrote to memory of 4904	2064	2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe	73
PID 2064 wrote to memory of 4904	2064	2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe	73
PID 2064 wrote to memory of 4904	2064	2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe	73
PID 2064 wrote to memory of 4904	2064	2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe	73
PID 2064 wrote to memory of 4904	2064	2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe	73
PID 4904 wrote to memory of 920	4904	2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe	74
PID 4904 wrote to memory of 920	4904	2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe	74
PID 4904 wrote to memory of 920	4904	2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe	74
PID 4904 wrote to memory of 1216	4904	2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe	75
PID 4904 wrote to memory of 1216	4904	2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe	75
PID 4904 wrote to memory of 1216	4904	2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe	75
PID 1216 wrote to memory of 2240	1216	2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe	77
PID 1216 wrote to memory of 2240	1216	2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe	77
PID 1216 wrote to memory of 2240	1216	2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe	77
PID 1216 wrote to memory of 2240	1216	2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe	77
PID 1216 wrote to memory of 2240	1216	2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe	77
PID 1216 wrote to memory of 2240	1216	2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe	77
PID 1216 wrote to memory of 2240	1216	2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe	77
PID 1216 wrote to memory of 2240	1216	2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe	77
PID 1216 wrote to memory of 2240	1216	2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe	77
PID 1216 wrote to memory of 2240	1216	2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe	77

C:\Users\Admin\AppData\Local\Temp\2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe
"C:\Users\Admin\AppData\Local\Temp\2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2064
- C:\Users\Admin\AppData\Local\Temp\2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe
  "C:\Users\Admin\AppData\Local\Temp\2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4904
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\a371e921-c194-44dc-9123-34b2ed4a213d" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:920
- - C:\Users\Admin\AppData\Local\Temp\2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe
    "C:\Users\Admin\AppData\Local\Temp\2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1216
  - - C:\Users\Admin\AppData\Local\Temp\2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe
      "C:\Users\Admin\AppData\Local\Temp\2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2240

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

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 b50c616b5c29bd9611ed360a238b6b6c421d0fe3b85df331e4951aefab526b2e
MD5 5857aff0ea0365561d0f06769a04101c
SHA1 0ac570f0ec93618c5849baf94c0a167e4a706a95
SHA512 1863b40407893a4a26beaa7ae4add199676c15b633d59afb4dfd2906328b29497fdddcb0ff01b9ba77ac59c5c55511fa669b0ffd6e02bcfa2d2cc53df62390be
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 6ad55f75fba0679db0b322ed57953f0e0a7c5d173f2e5b86b82c3d31c0d317db
MD5 ea074ce227379765f54803972f5d5a06
SHA1 50c72e9400cc20598d0be0b969e11394969c0d20
SHA512 16b0e7d99f942eef9a263fbd3ba82be2b48adc7951479d3ce50afb36d25e5541f4564041a8ead78141e6e1a607661578ba0e28d7217a89cad644ae7af7e20382
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 75b2313b9f0f33d55888493a2390cee3fb90d4b657da7d9f252744dfb6266cd8
MD5 71d8fb72670be4d11574333f50a24964
SHA1 eb0367c4d31ed8d3e49fd103b36e6a20eb2b082d
SHA512 0fc357edc1b958c03567005722d8bff347fed79a9b3abc879d6296bdf72bc1a802f32fd2be4f633c20e22ac94404b752aaa221306d555049a8577fa51a920019
MD5 SHA1 SHA512

Submit Download

2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe

Path C:\Users\Admin\AppData\Local\a371e921-c194-44dc-9123-34b2ed4a213d\2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca.exe
Size 761KB
SHA256 2e9b071f0a3140021b79bea378c2026399fff1546f23436b3aa7141b7d0fa3ca
MD5 70d66d2739a98bcce16222b6e2cf9a10
SHA1 530e77cc54befb715f57669078680b25300859e6
SHA512 b0052a360eaf4179692f3dbe84b96bd06d4a7feba7ffe9e44502d008fa3ce06331593181ccd9a22bd88121e023ae55bd1f4db376e496a94f85b8ef3dcbd7c4ef
SSDEEP 12288:htuUbmhmjAFGEH/TaoVeScIPGLO0RpaW+pmkOaJrHyBSbt+RKRsp+5:htuoAVxHLaaz2hR4mkVs2sp+5
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2064-4-0x00000000048A0000-0x00000000049BB000-memory.dmp

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memory/2064-1-0x0000000002E60000-0x0000000002EF2000-memory.dmp

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memory/2240-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2240-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2240-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2240-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2240-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2240-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2240-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2240-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4904-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4904-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4904-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4904-2-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4904-3-0x0000000000400000-0x0000000000537000-memory.dmp

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