djvu | 709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86

General

Target

JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe
Size

777KB
MD5

382374ea9002827f82ca9d5c15895083
SHA1

2d33145ba174cc3034201e5755bfa8d55e74b73f
SHA256

709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86
SHA512

8b253a9876362c7d11498cdeab7be11a28e91cd21a4bbe0583789503718befc4c4a14d9fac6b39fb2d3ca8cc8bfba1aa1f1a5c8230c0bef299ec7a9db1c9e370
SSDEEP

12288:rTm9yBZKpHoSiz255PNy71f4BXi9Rx2ce8wsnVlB49Zh+vg97:rTUXdD1y979b2c6P6g5

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.wztt
offline_id
pGPY4MKNHaEeN9pLKNW37rI0mblzUZFtPsjZ8Ht1
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/116-1-0x0000000004300000-0x000000000441B000-memory.dmp	family_djvu
behavioral2/memory/4176-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4176-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4176-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4176-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4176-15-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/800-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/800-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/800-22-0x0000000000400000-0x0000000000537000-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-1-5-21-2848203831-2014322062-3611574811-1000\Control Panel\International\Geo\Nation	JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2144	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-1-5-21-2848203831-2014322062-3611574811-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\b77808d4-2a26-44d5-a3b0-2ffe26a983db\\JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe\" --AutoStart"	JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.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
1	api.2ip.ua
2	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 116 set thread context of 4176	116	JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe	79
PID 3124 set thread context of 800	3124	JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe	83

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
3024	800	WerFault.exe	83

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4176	JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe
4176	JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 116 wrote to memory of 4176	116	JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe	79
PID 116 wrote to memory of 4176	116	JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe	79
PID 116 wrote to memory of 4176	116	JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe	79
PID 116 wrote to memory of 4176	116	JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe	79
PID 116 wrote to memory of 4176	116	JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe	79
PID 116 wrote to memory of 4176	116	JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe	79
PID 116 wrote to memory of 4176	116	JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe	79
PID 116 wrote to memory of 4176	116	JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe	79
PID 116 wrote to memory of 4176	116	JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe	79
PID 116 wrote to memory of 4176	116	JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe	79
PID 4176 wrote to memory of 2144	4176	JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe	80
PID 4176 wrote to memory of 2144	4176	JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe	80
PID 4176 wrote to memory of 2144	4176	JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe	80
PID 4176 wrote to memory of 3124	4176	JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe	81
PID 4176 wrote to memory of 3124	4176	JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe	81
PID 4176 wrote to memory of 3124	4176	JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe	81
PID 3124 wrote to memory of 800	3124	JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe	83
PID 3124 wrote to memory of 800	3124	JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe	83
PID 3124 wrote to memory of 800	3124	JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe	83
PID 3124 wrote to memory of 800	3124	JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe	83
PID 3124 wrote to memory of 800	3124	JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe	83
PID 3124 wrote to memory of 800	3124	JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe	83
PID 3124 wrote to memory of 800	3124	JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe	83
PID 3124 wrote to memory of 800	3124	JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe	83
PID 3124 wrote to memory of 800	3124	JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe	83
PID 3124 wrote to memory of 800	3124	JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe	83

C:\Users\Admin\AppData\Local\Temp\JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe
"C:\Users\Admin\AppData\Local\Temp\JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:116
- C:\Users\Admin\AppData\Local\Temp\JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe
  "C:\Users\Admin\AppData\Local\Temp\JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4176
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\b77808d4-2a26-44d5-a3b0-2ffe26a983db" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2144
- - C:\Users\Admin\AppData\Local\Temp\JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe
    "C:\Users\Admin\AppData\Local\Temp\JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3124
  - - C:\Users\Admin\AppData\Local\Temp\JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe
      "C:\Users\Admin\AppData\Local\Temp\JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      PID:800
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 800 -s 568
        5⤵
        Program crash
        
        PID:3024

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 800 -ip 800
1⤵
PID:4364

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\b77808d4-2a26-44d5-a3b0-2ffe26a983db\JC_709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86.exe

Filesize
777KB

MD5
382374ea9002827f82ca9d5c15895083

SHA1
2d33145ba174cc3034201e5755bfa8d55e74b73f

SHA256
709998d56e2dea30b5cfaa13108441c73089cd06a899e70362093b41fb406e86

SHA512
8b253a9876362c7d11498cdeab7be11a28e91cd21a4bbe0583789503718befc4c4a14d9fac6b39fb2d3ca8cc8bfba1aa1f1a5c8230c0bef299ec7a9db1c9e370

Download Submit
memory/116-1-0x0000000004300000-0x000000000441B000-memory.dmp

Filesize
1.1MB

Download
memory/116-0-0x0000000004190000-0x0000000004222000-memory.dmp

Filesize
584KB

Download
memory/116-4-0x0000000004190000-0x0000000004222000-memory.dmp

Filesize
584KB

Download
memory/800-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/800-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/800-19-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3124-17-0x0000000002620000-0x00000000026B2000-memory.dmp

Filesize
584KB

Download
memory/4176-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4176-15-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4176-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4176-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4176-2-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads