djvu | b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601

General

Target

b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
Size

716KB
MD5

ed7ad480d60d0e5788e20bbdc292643e
SHA1

704ffc256ecfa1ea9d11811ffab5e5bb5e21ca84
SHA256

b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601
SHA512

d77366c4f056148948f0f711935aaf95e647e9d85b3c562eafe5187834adb87e7f7c405dd35a8782d61eb1a503197d21e020577a26675c2f9eba45a25132725c
SSDEEP

12288:w3nDE3q0eoovfMB0jF5oWmOXIGVSgy2a5+ISFdGg481OIJQ8neK:w343qjoic4FhmO4oSbUFDbOIJ

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.vehu
offline_id
EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1
payload_url
http://sdfjhuz.com/dl/build2.exe

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

Signatures

Detected Djvu ransomware 15 IoCs

Processes:

resource	yara_rule
behavioral1/memory/212-2-0x0000000004A20000-0x0000000004B3B000-memory.dmp	family_djvu
behavioral1/memory/2576-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2576-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2576-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2576-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2576-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4140-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4140-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4140-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4140-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4140-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4140-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4140-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4140-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4140-35-0x0000000000400000-0x0000000000537000-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

Processes:

b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe

Modifies file permissions 1 TTPs 1 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

icacls.exe

pid process

1008 icacls.exe

pid	process
1008	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\f95b03db-da29-4dff-a6f1-193440662d3c\\b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe\" --AutoStart"	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.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.

Processes:

flow ioc

7 api.2ip.ua
8 api.2ip.ua
18 api.2ip.ua

flow	ioc
7	api.2ip.ua
8	api.2ip.ua
18	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

Processes:

b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exeb670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe

description	pid	process	target process
PID 212 set thread context of 2576	212	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 368 set thread context of 4140	368	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exeb670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe

pid	process
2576	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
2576	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
4140	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
4140	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exeb670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exeb670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe

C:\Users\Admin\AppData\Local\Temp\b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
"C:\Users\Admin\AppData\Local\Temp\b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:212

C:\Users\Admin\AppData\Local\Temp\b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
"C:\Users\Admin\AppData\Local\Temp\b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe"
2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2576

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\f95b03db-da29-4dff-a6f1-193440662d3c" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:1008

C:\Users\Admin\AppData\Local\Temp\b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
"C:\Users\Admin\AppData\Local\Temp\b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:368

C:\Users\Admin\AppData\Local\Temp\b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
"C:\Users\Admin\AppData\Local\Temp\b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Suspicious behavior: EnumeratesProcesses
PID:4140

Network

MITRE ATT&CK Matrix ATT&CK v13

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

1

T1222

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize
1KB

MD5
7bb5a14437331aad24915a3d8546fbc1

SHA1
9a5570c07af0c0cde02858f61e1c7094f5a70f38

SHA256
42397d9f3c8164d4cef19fc169d7bcea77a3ea7e9bcb8cfa7db2ff0bbd3a7e00

SHA512
a2333a078be981eafe3f666ff3944cd3b28279a9da99f354014d81d80e98a0effabff2a8f5ab5fba61f7de9e49e2af3112dda6b28678192a1d80d2ca22004f13

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
24af5a6a2a587450a32eb5ca9e8a9bf5

SHA1
3ea646d3eb94f746485e9f2d1048b7f9f24d339f

SHA256
6e9e36705de9c82fe88a4f6f424eb04f3e5b868dbb41a592baa91996c424d1e8

SHA512
8144832e0df0fbecda27047b962edf0f6c45d411b6095bbd0d42b2295d631f01eb345597c7ac5347dad42d8bbbcd588cf1c78fb6ed29fc404223d3316023af21

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize
392B

MD5
794700ceb74f331da27a229943c6e697

SHA1
fc6589bfd81218e25c2b2dae3e96e6c0f92447ee

SHA256
6e4e800d66d7539d8dfb711622c032e45796dd3204bfb37d47779df0dd5c616c

SHA512
9dc10f4a1a0f80f8a0a0abd51dee7dd27e03166cd071a2573a80636c5197ac3d84343933dc390658f41125e1b9026f1cd2debd3af1eb58aa65515039a26b9066

Download Submit
C:\Users\Admin\AppData\Local\f95b03db-da29-4dff-a6f1-193440662d3c\b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
Filesize
716KB

MD5
ed7ad480d60d0e5788e20bbdc292643e

SHA1
704ffc256ecfa1ea9d11811ffab5e5bb5e21ca84

SHA256
b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601

SHA512
d77366c4f056148948f0f711935aaf95e647e9d85b3c562eafe5187834adb87e7f7c405dd35a8782d61eb1a503197d21e020577a26675c2f9eba45a25132725c

Download Submit
memory/212-1-0x0000000004980000-0x0000000004A1B000-memory.dmp

Filesize
620KB

Download
memory/212-2-0x0000000004A20000-0x0000000004B3B000-memory.dmp

Filesize
1.1MB

Download
memory/2576-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2576-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2576-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2576-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2576-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4140-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4140-25-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4140-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4140-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4140-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4140-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4140-33-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4140-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4140-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

description	pid	process	target process
PID 212 wrote to memory of 2576	212	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 212 wrote to memory of 2576	212	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 212 wrote to memory of 2576	212	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 212 wrote to memory of 2576	212	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 212 wrote to memory of 2576	212	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 212 wrote to memory of 2576	212	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 212 wrote to memory of 2576	212	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 212 wrote to memory of 2576	212	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 212 wrote to memory of 2576	212	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 212 wrote to memory of 2576	212	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 2576 wrote to memory of 1008	2576	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	icacls.exe
PID 2576 wrote to memory of 1008	2576	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	icacls.exe
PID 2576 wrote to memory of 1008	2576	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	icacls.exe
PID 2576 wrote to memory of 368	2576	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 2576 wrote to memory of 368	2576	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 2576 wrote to memory of 368	2576	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 368 wrote to memory of 4140	368	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 368 wrote to memory of 4140	368	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 368 wrote to memory of 4140	368	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 368 wrote to memory of 4140	368	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 368 wrote to memory of 4140	368	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 368 wrote to memory of 4140	368	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 368 wrote to memory of 4140	368	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 368 wrote to memory of 4140	368	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 368 wrote to memory of 4140	368	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 368 wrote to memory of 4140	368	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads