djvu | c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d

General

Target

c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe
Size

825KB
MD5

a396fe245f20167c4ca851964a04ed82
SHA1

649c7f054b8ea9ea85b2471e48c16256ff9bdb06
SHA256

c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d
SHA512

adf814dbdf0232f6fc600d80c8931a603807902ac64214fc1a6f7af4611f3a539edd9e08eb219b767f9e7693d8423e3943d0bccc9c10454b81a8a3529a2d519a
SSDEEP

12288:+e7f6+LF0YaGXLrS/Kxs/al3diVHJQqYmjXiHIqluOiwuvE1CDpPksEWo:+e7HKYafxilEVHJPYmioqluOUc2Zo

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.uazq
offline_id
Jx0i3k2ogR5cKxX1evmz0Ex7TUxOUlnbh2dvnIt1
payload_url
http://sdfjhuz.com/dl/build2.exe

http://sajdfue.com/files/1/build3.exe
ransomnote
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rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

resource	yara_rule
behavioral2/memory/4092-2-0x0000000004BD0000-0x0000000004CEB000-memory.dmp	family_djvu
behavioral2/memory/3296-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3296-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3296-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3296-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3296-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1620-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1620-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1620-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1620-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1620-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1620-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1620-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1620-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1620-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1620-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1620-39-0x0000000000400000-0x0000000000537000-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
2528	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-1-5-21-2567984660-2719943099-2683635618-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\8eacd101-8148-4572-b19b-a8c8729f2313\\c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe\" --AutoStart"	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.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
6	api.2ip.ua
1	api.2ip.ua
2	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4092 set thread context of 3296	4092	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	76
PID 3948 set thread context of 1620	3948	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	81

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
3296	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe
3296	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe
1620	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe
1620	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4092 wrote to memory of 3296	4092	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	76
PID 4092 wrote to memory of 3296	4092	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	76
PID 4092 wrote to memory of 3296	4092	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	76
PID 4092 wrote to memory of 3296	4092	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	76
PID 4092 wrote to memory of 3296	4092	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	76
PID 4092 wrote to memory of 3296	4092	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	76
PID 4092 wrote to memory of 3296	4092	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	76
PID 4092 wrote to memory of 3296	4092	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	76
PID 4092 wrote to memory of 3296	4092	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	76
PID 4092 wrote to memory of 3296	4092	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	76
PID 3296 wrote to memory of 2528	3296	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	77
PID 3296 wrote to memory of 2528	3296	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	77
PID 3296 wrote to memory of 2528	3296	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	77
PID 3296 wrote to memory of 3948	3296	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	78
PID 3296 wrote to memory of 3948	3296	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	78
PID 3296 wrote to memory of 3948	3296	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	78
PID 3948 wrote to memory of 1620	3948	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	81
PID 3948 wrote to memory of 1620	3948	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	81
PID 3948 wrote to memory of 1620	3948	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	81
PID 3948 wrote to memory of 1620	3948	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	81
PID 3948 wrote to memory of 1620	3948	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	81
PID 3948 wrote to memory of 1620	3948	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	81
PID 3948 wrote to memory of 1620	3948	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	81
PID 3948 wrote to memory of 1620	3948	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	81
PID 3948 wrote to memory of 1620	3948	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	81
PID 3948 wrote to memory of 1620	3948	c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe	81

C:\Users\Admin\AppData\Local\Temp\c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe
"C:\Users\Admin\AppData\Local\Temp\c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4092
- C:\Users\Admin\AppData\Local\Temp\c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe
  "C:\Users\Admin\AppData\Local\Temp\c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3296
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\8eacd101-8148-4572-b19b-a8c8729f2313" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2528
- - C:\Users\Admin\AppData\Local\Temp\c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe
    "C:\Users\Admin\AppData\Local\Temp\c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3948
  - - C:\Users\Admin\AppData\Local\Temp\c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe
      "C:\Users\Admin\AppData\Local\Temp\c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1620

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

System Information Discovery

1

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
38fe440dcb41bf01baa39153169a3d74

SHA1
74a11892ffb1e9baf34fca27ce617993a3221080

SHA256
80c40063d4b3729809906924dd55487a4f20c5bc8aeefa8cfc313dc532f7e423

SHA512
eaf66971a2b57aa93c9fb3c2d25759174dfb0a90d61f2589aeee59d3c540b5cbd9fb669891616e57b41d66b41b6586c3724d3b02f91a86bb7bd905bf2faac31c

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
066d3fcc79017d585345ee8686b4a979

SHA1
12f06b995f1a1eca70f4454ee65fa0f2bdd0895a

SHA256
e427959ed6543e4fdd5abecc397fca1bed58d60a366684e173ed0edd812c61e8

SHA512
7ff5fc793847ff368a01f5d886b1b2035c2efd57b10750523d8abd9f3a206d345815d1f92ee8ee315a5e5d4ec79c90cfa3134046fb0276aa50b756ad5fa53987

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

Filesize
392B

MD5
a416abe96ee0508fa28c471d2bc245d3

SHA1
37668437d07118c4b1b7eef55a7689a1a52fffe6

SHA256
b5e53e642dbc00328cc44d822a1980241fa436f74636474239f1ca97ce2e1e6b

SHA512
fe8a1fb51993e7db0f7c49186204b2900effe2fffe42700cd9c97dff3a460a194e3ef04b30416dc2e32ddbbaba5bf8553c93f3566fe2aa52ce9d96429cc2564b

Download Submit
C:\Users\Admin\AppData\Local\8eacd101-8148-4572-b19b-a8c8729f2313\c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d.exe

Filesize
825KB

MD5
a396fe245f20167c4ca851964a04ed82

SHA1
649c7f054b8ea9ea85b2471e48c16256ff9bdb06

SHA256
c40bf84f9b9f88fa2d444c53ce49f4f52df0fc39f6f564246144a3f53595bf8d

SHA512
adf814dbdf0232f6fc600d80c8931a603807902ac64214fc1a6f7af4611f3a539edd9e08eb219b767f9e7693d8423e3943d0bccc9c10454b81a8a3529a2d519a

Download Submit
memory/1620-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1620-39-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1620-38-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1620-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1620-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1620-23-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1620-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1620-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1620-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1620-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1620-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3296-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3296-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3296-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3296-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3296-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3948-20-0x00000000049E0000-0x0000000004A81000-memory.dmp

Filesize
644KB

Download
memory/4092-2-0x0000000004BD0000-0x0000000004CEB000-memory.dmp

Filesize
1.1MB

Download
memory/4092-1-0x0000000004AF0000-0x0000000004B83000-memory.dmp

Filesize
588KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads