djvu | d97ae44665ac32428a6f1d8b20225e1f6212d8115718d84d0bf1a4b57d5be7f3

General

Target

file.exe
Size

803KB
MD5

9a1a72ddc2c7a5e59c8fabb798266660
SHA1

48c1fdf3a18aa5938dd147bf701518424a26c8f2
SHA256

d97ae44665ac32428a6f1d8b20225e1f6212d8115718d84d0bf1a4b57d5be7f3
SHA512

f0fa5818445960f0b20ac554067ba3167cf6890fdd1e162b2ca00f7fb5fee17e352f85ee1e8244d94fb3ab59f3907c78aa8a6dc4a83d792ae051456673724093
SSDEEP

12288:/7Iyjosks106agjxJ+NWK9LJyatLKmDf8L06iOnBH5CP1KNto2Z+l:cPskK/N8NW4JbKvLTDBH5+UXZ+

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.ttza
offline_id
9qw1wmu1ty4GEiHZdxilHPjCyX6ENKTotjt6MIt1
payload_url
http://colisumy.com/dl/build2.exe

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

Signatures

Detected Djvu ransomware 9 IoCs

resource	yara_rule
behavioral2/memory/2248-2-0x0000000004200000-0x000000000431B000-memory.dmp	family_djvu
behavioral2/memory/1992-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1992-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1992-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1992-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1992-15-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3736-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3736-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3736-23-0x0000000000400000-0x0000000000537000-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-1-5-21-2344688013-2965468717-2034126-1000\Control Panel\International\Geo\Nation	file.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4036	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-1-5-21-2344688013-2965468717-2034126-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\7653a292-e9bd-45cc-a18d-5368334ef2af\\file.exe\" --AutoStart"	file.exe

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
16	api.2ip.ua
17	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2248 set thread context of 1992	2248	file.exe	85
PID 4448 set thread context of 3736	4448	file.exe	94

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3520	3736	WerFault.exe	94

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1992	file.exe
1992	file.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2248 wrote to memory of 1992	2248	file.exe	85
PID 2248 wrote to memory of 1992	2248	file.exe	85
PID 2248 wrote to memory of 1992	2248	file.exe	85
PID 2248 wrote to memory of 1992	2248	file.exe	85
PID 2248 wrote to memory of 1992	2248	file.exe	85
PID 2248 wrote to memory of 1992	2248	file.exe	85
PID 2248 wrote to memory of 1992	2248	file.exe	85
PID 2248 wrote to memory of 1992	2248	file.exe	85
PID 2248 wrote to memory of 1992	2248	file.exe	85
PID 2248 wrote to memory of 1992	2248	file.exe	85
PID 1992 wrote to memory of 4036	1992	file.exe	87
PID 1992 wrote to memory of 4036	1992	file.exe	87
PID 1992 wrote to memory of 4036	1992	file.exe	87
PID 1992 wrote to memory of 4448	1992	file.exe	89
PID 1992 wrote to memory of 4448	1992	file.exe	89
PID 1992 wrote to memory of 4448	1992	file.exe	89
PID 4448 wrote to memory of 3736	4448	file.exe	94
PID 4448 wrote to memory of 3736	4448	file.exe	94
PID 4448 wrote to memory of 3736	4448	file.exe	94
PID 4448 wrote to memory of 3736	4448	file.exe	94
PID 4448 wrote to memory of 3736	4448	file.exe	94
PID 4448 wrote to memory of 3736	4448	file.exe	94
PID 4448 wrote to memory of 3736	4448	file.exe	94
PID 4448 wrote to memory of 3736	4448	file.exe	94
PID 4448 wrote to memory of 3736	4448	file.exe	94
PID 4448 wrote to memory of 3736	4448	file.exe	94

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2248
- C:\Users\Admin\AppData\Local\Temp\file.exe
  "C:\Users\Admin\AppData\Local\Temp\file.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1992
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\7653a292-e9bd-45cc-a18d-5368334ef2af" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4036
- - C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4448
  - - C:\Users\Admin\AppData\Local\Temp\file.exe
      "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      PID:3736
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3736 -s 576
        5⤵
        Program crash
        
        PID:3520

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 3736 -ip 3736
1⤵
PID:3268

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\Local\7653a292-e9bd-45cc-a18d-5368334ef2af\file.exe

Filesize
803KB

MD5
9a1a72ddc2c7a5e59c8fabb798266660

SHA1
48c1fdf3a18aa5938dd147bf701518424a26c8f2

SHA256
d97ae44665ac32428a6f1d8b20225e1f6212d8115718d84d0bf1a4b57d5be7f3

SHA512
f0fa5818445960f0b20ac554067ba3167cf6890fdd1e162b2ca00f7fb5fee17e352f85ee1e8244d94fb3ab59f3907c78aa8a6dc4a83d792ae051456673724093

Download Submit
memory/1992-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1992-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1992-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1992-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1992-15-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2248-1-0x00000000040B0000-0x0000000004148000-memory.dmp

Filesize
608KB

Download
memory/2248-2-0x0000000004200000-0x000000000431B000-memory.dmp

Filesize
1.1MB

Download
memory/3736-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3736-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3736-23-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4448-18-0x0000000003F40000-0x0000000003FD4000-memory.dmp

Filesize
592KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads