djvu | c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f

General

Target

c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
Size

751KB
MD5

a7a2d00c9c52d5b3687c4316a5ee67be
SHA1

0a1bf7d283320fb9416e6cc60011bf2058249d93
SHA256

c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f
SHA512

0a6a6cdba593e2f74b11ff2b9412b1218fec673779da862ccc886fbbb9430b54618eaef5aaa88da5d5a53b2bddf9296b15e6f36e15771acf216a61496be71636
SSDEEP

12288:jd+8zJ6wTm6I9ML4eNA0+Rf0aftj7NLZadzYJ04QALAxBmr0GrnttB9ZBBHH:jd3pmvq7NA0+Pfl7NFadzu04QqA7mr0e

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.bgjs
offline_id
Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1
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 17 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3656-2-0x0000000004AE0000-0x0000000004BFB000-memory.dmp	family_djvu
behavioral1/memory/3876-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3876-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3876-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3876-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3876-15-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3436-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3436-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3436-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3436-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3436-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3436-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3436-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3436-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3436-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3436-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3436-37-0x0000000000400000-0x0000000000537000-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

Processes:

c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2288054676-1871194608-3559553667-1000\Control Panel\International\Geo\Nation	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe

Modifies file permissions 1 TTPs 1 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

icacls.exe

pid process

1628 icacls.exe

pid	process
1628	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2288054676-1871194608-3559553667-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\3f2a5abd-3b53-49c0-a3f0-ceb467aa9bb5\\c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe\" --AutoStart"	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.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

25 api.2ip.ua
27 api.2ip.ua
46 api.2ip.ua

flow	ioc
25	api.2ip.ua
27	api.2ip.ua
46	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

Processes:

c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exec956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe

description	pid	process	target process
PID 3656 set thread context of 3876	3656	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 4104 set thread context of 3436	4104	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.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:

c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exec956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe

pid	process
3876	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
3876	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
3436	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
3436	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exec956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exec956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe

C:\Users\Admin\AppData\Local\Temp\c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
"C:\Users\Admin\AppData\Local\Temp\c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3656

C:\Users\Admin\AppData\Local\Temp\c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
"C:\Users\Admin\AppData\Local\Temp\c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe"
2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3876

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\3f2a5abd-3b53-49c0-a3f0-ceb467aa9bb5" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:1628

C:\Users\Admin\AppData\Local\Temp\c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
"C:\Users\Admin\AppData\Local\Temp\c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4104

C:\Users\Admin\AppData\Local\Temp\c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
"C:\Users\Admin\AppData\Local\Temp\c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Suspicious behavior: EnumeratesProcesses
PID:3436

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

Loading Replay Monitor...

Downloads

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

MD5
132a59b12289f608ea38eb370d498a8f

SHA1
0fd8a23d395d38719cb0b71ee10df56ce35a6c4c

SHA256
d6fcf2cd41b542b6d7ee6daa10cf080f4b6220cbce855be03d689d1ad080ed9b

SHA512
ea953e93faf4c78e1b9e3768a463f6b46548af00b430ebd275054f7da1e1f4c40746bd3ff4ca02c0fd107bf78b02b67069075939b719c00a7e4bc2f4ecb46da1

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
f3fe040e75615059cc7850415fdb868a

SHA1
0016b4f724c04a4d1bd75a3d93ed23d255b5f3eb

SHA256
5aa59e4dc34bbc0f6864c8977f1d4df42f2f1eb3499ce3cb37055b391f583e48

SHA512
8d7576a52e465f4537728128387e912c944f594b81dc28df9e6cd914aa412164807fe326f88637dc339427ababc6b239c34e050f23b17db991875dd19d590068

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

MD5
126672c443ee4dd457e48caa33a11466

SHA1
f2a0e95baf633f1275dadff6dc47f62e2b08cad0

SHA256
e76717a75582ceeb15899a461fd9ba37f6049631776271dbc9c80aae6b0dcccc

SHA512
ac4beeea61a4838256976cdcc13a8997dce9e86c4028ba597b58dd3e4ccf2b051af151d5be2060a82989d45307b70f2f68708119a4772d2dca252e857f855bd8

Download Submit
C:\Users\Admin\AppData\Local\3f2a5abd-3b53-49c0-a3f0-ceb467aa9bb5\c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
Filesize
751KB

MD5
a7a2d00c9c52d5b3687c4316a5ee67be

SHA1
0a1bf7d283320fb9416e6cc60011bf2058249d93

SHA256
c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f

SHA512
0a6a6cdba593e2f74b11ff2b9412b1218fec673779da862ccc886fbbb9430b54618eaef5aaa88da5d5a53b2bddf9296b15e6f36e15771acf216a61496be71636

Download Submit
memory/3436-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3436-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3436-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3436-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3436-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3436-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3436-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3436-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3436-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3436-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3436-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3656-2-0x0000000004AE0000-0x0000000004BFB000-memory.dmp

Filesize
1.1MB

Download
memory/3656-1-0x0000000003220000-0x00000000032BB000-memory.dmp

Filesize
620KB

Download
memory/3876-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3876-15-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3876-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3876-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3876-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4104-18-0x0000000003200000-0x000000000329C000-memory.dmp

Filesize
624KB

Download

description	pid	process	target process
PID 3656 wrote to memory of 3876	3656	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 3656 wrote to memory of 3876	3656	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 3656 wrote to memory of 3876	3656	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 3656 wrote to memory of 3876	3656	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 3656 wrote to memory of 3876	3656	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 3656 wrote to memory of 3876	3656	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 3656 wrote to memory of 3876	3656	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 3656 wrote to memory of 3876	3656	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 3656 wrote to memory of 3876	3656	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 3656 wrote to memory of 3876	3656	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 3876 wrote to memory of 1628	3876	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	icacls.exe
PID 3876 wrote to memory of 1628	3876	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	icacls.exe
PID 3876 wrote to memory of 1628	3876	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	icacls.exe
PID 3876 wrote to memory of 4104	3876	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 3876 wrote to memory of 4104	3876	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 3876 wrote to memory of 4104	3876	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 4104 wrote to memory of 3436	4104	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 4104 wrote to memory of 3436	4104	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 4104 wrote to memory of 3436	4104	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 4104 wrote to memory of 3436	4104	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 4104 wrote to memory of 3436	4104	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 4104 wrote to memory of 3436	4104	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 4104 wrote to memory of 3436	4104	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 4104 wrote to memory of 3436	4104	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 4104 wrote to memory of 3436	4104	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe
PID 4104 wrote to memory of 3436	4104	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe	c956cc500363bf1c75db1dcb4088f5145438cd7f2687e2d7d504f8fe4d8d693f.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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