djvu | a706c1d0d748f3847de78ea63f7b3b6a6336f5750c84241e6b7fd0d45cd43765

General

Target

file.exe
Size

758KB
MD5

147f66a4ab5d877e9cd347e9c16fcd72
SHA1

37e9024c5d64d51d01a1b1c9b3f1b5758693cedb
SHA256

a706c1d0d748f3847de78ea63f7b3b6a6336f5750c84241e6b7fd0d45cd43765
SHA512

20ccb69ce1ced51fec5b87abfaa7418321700e28c2e8f23251564276662ba000479ea6d387f66e45325bae79fec078f5664b3ba925f90f1041213a097c783357
SSDEEP

12288:uA8auX4Zp7MC2bkWKvkfsIvkjAvh1rJyjvQe4XcIVvfdquBAsbDG:uZXcV7kkkfsI2qXF8vQe4XcILAs+

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.yzqe
offline_id
x2zqmFxw8ydx3wkiEeNayQ64Eyg2U5MS31sTegt1
payload_url
ransomnote
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rsa_pubkey.plain

Signatures

Detected Djvu ransomware 9 IoCs

resource	yara_rule
behavioral2/memory/2552-2-0x0000000002650000-0x000000000276B000-memory.dmp	family_djvu
behavioral2/memory/3724-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3724-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3724-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3724-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3724-15-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4180-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4180-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4180-23-0x0000000000400000-0x0000000000537000-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-1-5-21-984744499-3605095035-265325720-1000\Control Panel\International\Geo\Nation	file.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1348	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-1-5-21-984744499-3605095035-265325720-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\7b5c182b-1bed-4202-8a31-ac8d93455605\\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
36	api.2ip.ua
37	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2552 set thread context of 3724	2552	file.exe	95
PID 2768 set thread context of 4180	2768	file.exe	100

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
4492	4180	WerFault.exe	100

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3724	file.exe
3724	file.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2552 wrote to memory of 3724	2552	file.exe	95
PID 2552 wrote to memory of 3724	2552	file.exe	95
PID 2552 wrote to memory of 3724	2552	file.exe	95
PID 2552 wrote to memory of 3724	2552	file.exe	95
PID 2552 wrote to memory of 3724	2552	file.exe	95
PID 2552 wrote to memory of 3724	2552	file.exe	95
PID 2552 wrote to memory of 3724	2552	file.exe	95
PID 2552 wrote to memory of 3724	2552	file.exe	95
PID 2552 wrote to memory of 3724	2552	file.exe	95
PID 2552 wrote to memory of 3724	2552	file.exe	95
PID 3724 wrote to memory of 1348	3724	file.exe	96
PID 3724 wrote to memory of 1348	3724	file.exe	96
PID 3724 wrote to memory of 1348	3724	file.exe	96
PID 3724 wrote to memory of 2768	3724	file.exe	97
PID 3724 wrote to memory of 2768	3724	file.exe	97
PID 3724 wrote to memory of 2768	3724	file.exe	97
PID 2768 wrote to memory of 4180	2768	file.exe	100
PID 2768 wrote to memory of 4180	2768	file.exe	100
PID 2768 wrote to memory of 4180	2768	file.exe	100
PID 2768 wrote to memory of 4180	2768	file.exe	100
PID 2768 wrote to memory of 4180	2768	file.exe	100
PID 2768 wrote to memory of 4180	2768	file.exe	100
PID 2768 wrote to memory of 4180	2768	file.exe	100
PID 2768 wrote to memory of 4180	2768	file.exe	100
PID 2768 wrote to memory of 4180	2768	file.exe	100
PID 2768 wrote to memory of 4180	2768	file.exe	100

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:2552
- 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:3724
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\7b5c182b-1bed-4202-8a31-ac8d93455605" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1348
- - 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:2768
  - - C:\Users\Admin\AppData\Local\Temp\file.exe
      "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      PID:4180
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 4180 -s 568
        5⤵
        Program crash
        
        PID:4492

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 4180 -ip 4180
1⤵
PID:4976

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\7b5c182b-1bed-4202-8a31-ac8d93455605\file.exe

Filesize
758KB

MD5
147f66a4ab5d877e9cd347e9c16fcd72

SHA1
37e9024c5d64d51d01a1b1c9b3f1b5758693cedb

SHA256
a706c1d0d748f3847de78ea63f7b3b6a6336f5750c84241e6b7fd0d45cd43765

SHA512
20ccb69ce1ced51fec5b87abfaa7418321700e28c2e8f23251564276662ba000479ea6d387f66e45325bae79fec078f5664b3ba925f90f1041213a097c783357

Download Submit
memory/2552-1-0x0000000002590000-0x000000000262E000-memory.dmp

Filesize
632KB

Download
memory/2552-2-0x0000000002650000-0x000000000276B000-memory.dmp

Filesize
1.1MB

Download
memory/2768-18-0x00000000024C0000-0x0000000002562000-memory.dmp

Filesize
648KB

Download
memory/3724-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3724-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3724-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3724-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3724-15-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4180-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4180-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4180-23-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads