djvu | b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5

General

Target

b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe
Size

732KB
MD5

ca106182fc4543131ef128b77f57c70a
SHA1

26d5069dfabecd28077365ecdb2704a621527c96
SHA256

b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5
SHA512

04f911af74389114301acc580e6041f6350df4eceb1ad6dc6034bef75d388581391c37d83847adc61a8b83e9b68b72f17e2d1f2b4a185bc7efd2b03d92daba4f
SSDEEP

12288:2L2LS6hjiwI975M/yK2YdeY0M2DbnRsN82298kZaZvmaifZSKANOx+D:2L2xn/yXNY0M0Vl6v1wZkNO0

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.cdpo
offline_id
Bn3q97hwLouKbhkQRNO4SeV07gjdEQVm8NKhg0t1
payload_url
http://brusuax.com/dl/build2.exe

http://habrafa.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-FCWSCsjEWS Price of private key and decrypt software is $1999. Discount 50% available if you contact us first 72 hours, that's price for you is $999. 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: 0844OSkw

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

resource	yara_rule
behavioral2/memory/2088-2-0x0000000002310000-0x000000000242B000-memory.dmp	family_djvu
behavioral2/memory/2100-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2100-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2100-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2100-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2100-15-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/448-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/448-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/448-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/448-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/448-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/448-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/448-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/448-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/448-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/448-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/448-37-0x0000000000400000-0x0000000000537000-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-1-5-21-566096764-1992588923-1249862864-1000\Control Panel\International\Geo\Nation	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4708	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-1-5-21-566096764-1992588923-1249862864-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\7a1da38d-ca45-4970-b38e-93af0b4470e7\\b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe\" --AutoStart"	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.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
10	api.2ip.ua
11	api.2ip.ua
22	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2088 set thread context of 2100	2088	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	88
PID 4212 set thread context of 448	4212	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	96

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
2100	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe
2100	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe
448	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe
448	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2088 wrote to memory of 2100	2088	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	88
PID 2088 wrote to memory of 2100	2088	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	88
PID 2088 wrote to memory of 2100	2088	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	88
PID 2088 wrote to memory of 2100	2088	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	88
PID 2088 wrote to memory of 2100	2088	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	88
PID 2088 wrote to memory of 2100	2088	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	88
PID 2088 wrote to memory of 2100	2088	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	88
PID 2088 wrote to memory of 2100	2088	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	88
PID 2088 wrote to memory of 2100	2088	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	88
PID 2088 wrote to memory of 2100	2088	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	88
PID 2100 wrote to memory of 4708	2100	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	93
PID 2100 wrote to memory of 4708	2100	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	93
PID 2100 wrote to memory of 4708	2100	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	93
PID 2100 wrote to memory of 4212	2100	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	94
PID 2100 wrote to memory of 4212	2100	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	94
PID 2100 wrote to memory of 4212	2100	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	94
PID 4212 wrote to memory of 448	4212	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	96
PID 4212 wrote to memory of 448	4212	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	96
PID 4212 wrote to memory of 448	4212	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	96
PID 4212 wrote to memory of 448	4212	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	96
PID 4212 wrote to memory of 448	4212	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	96
PID 4212 wrote to memory of 448	4212	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	96
PID 4212 wrote to memory of 448	4212	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	96
PID 4212 wrote to memory of 448	4212	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	96
PID 4212 wrote to memory of 448	4212	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	96
PID 4212 wrote to memory of 448	4212	b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe	96

C:\Users\Admin\AppData\Local\Temp\b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe
"C:\Users\Admin\AppData\Local\Temp\b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2088
- C:\Users\Admin\AppData\Local\Temp\b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe
  "C:\Users\Admin\AppData\Local\Temp\b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2100
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\7a1da38d-ca45-4970-b38e-93af0b4470e7" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4708
- - C:\Users\Admin\AppData\Local\Temp\b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe
    "C:\Users\Admin\AppData\Local\Temp\b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4212
  - - C:\Users\Admin\AppData\Local\Temp\b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe
      "C:\Users\Admin\AppData\Local\Temp\b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:448

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

File and Directory Permissions Modification

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
1KB

MD5
5c443b68792005ef031354bed4067e3f

SHA1
354688e202e4551e30c61892d39960af2b3fec67

SHA256
00146606f8500163a204f076d273b4d4d80082660aedbbd4525f3775c29d1011

SHA512
b7ccecd08318b1c2965da6a6e013a44b7d879dbb2fd13a61b47fb6da155a5580a4d17f6e5c91a97f367de157d7d863f35df47a8cb258cef570a4decfd8980de5

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
9eb91199ed78748d161d14491a98b20d

SHA1
32a8834fd257695d0fe5f5b99e571add5211609d

SHA256
c235e6cc20d8dcfcad0a4ac13efdbf65d894d000dcf04d490939b25f1d035308

SHA512
5b43d98d175885e1a23608cf0a89457155d17c562f7440c44e94d8c71d5982976198595e34cb397214ba27ffe5aa51e04464ca81ba9d9c27c36f90d0ca11873e

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

Filesize
392B

MD5
5cc0e971898d908e193f8ea2827fdf72

SHA1
eaa8b8f071eb1da55eb9e79842893eaf50499f90

SHA256
36a5ff1a1e4c245a1256c5b1530aad8a8656cd6645065b7ff4ff97fd6b76060d

SHA512
9bf38f7055c6844669d49a85355e64b8a336ec66574cb9cf9dd2f4ebdb1bce33ec4e4d5edba6bf1c51211a63efbf1c0c89af2facfbcb28780dea2fb4690da863

Download Submit
C:\Users\Admin\AppData\Local\7a1da38d-ca45-4970-b38e-93af0b4470e7\b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5.exe

Filesize
732KB

MD5
ca106182fc4543131ef128b77f57c70a

SHA1
26d5069dfabecd28077365ecdb2704a621527c96

SHA256
b6e0b3fdd03c8e6da4709362e6c1dc95e5af4443a5bb6335ab848c1f26c0bee5

SHA512
04f911af74389114301acc580e6041f6350df4eceb1ad6dc6034bef75d388581391c37d83847adc61a8b83e9b68b72f17e2d1f2b4a185bc7efd2b03d92daba4f

Download Submit
memory/448-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/448-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/448-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/448-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/448-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/448-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/448-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/448-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/448-33-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/448-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/448-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2088-2-0x0000000002310000-0x000000000242B000-memory.dmp

Filesize
1.1MB

Download
memory/2088-1-0x0000000000590000-0x0000000000625000-memory.dmp

Filesize
596KB

Download
memory/2100-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2100-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2100-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2100-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2100-15-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4212-18-0x0000000000590000-0x0000000000624000-memory.dmp

Filesize
592KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads