djvu | 4de2d00f758ece9e388f390616b66ca6581376cc674a6c2448f1bd9301246e8b

General

Target

02854599.exe
Size

782KB
MD5

7f6667ae84281e5d97ac298efbcb6707
SHA1

1a88e2c8803884c71dc0955c7cfd942fa875617a
SHA256

4de2d00f758ece9e388f390616b66ca6581376cc674a6c2448f1bd9301246e8b
SHA512

4e3ae39b9e032328c199a165eb6fc4a8568f7debd03cf3b639e455ec138538ec6cd5381bd1525e40d141ca27fa54ccf817b3d79e0e703856717efcfe0ae25198
SSDEEP

12288:MQtgyuKiArFJFeGXdIMaKjv+PdzQm9eG1L6vv+PP4VPd:MQ6ZKbFJbz0dd9eG16vA4

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.vapo
offline_id
BUcuB8PRg0LNi380axIJs5BS8nCUdeo9U88L2Lt1
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 19 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3556-2-0x0000000002480000-0x000000000259B000-memory.dmp	family_djvu
behavioral2/memory/4356-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4356-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4356-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4356-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4356-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4124-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4124-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4124-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4124-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4124-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4124-45-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4124-51-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4124-62-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4124-63-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4124-65-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4124-66-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4124-67-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4124-68-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

02854599.exe02854599.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation	02854599.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation	02854599.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

Processes:

icacls.exe

pid	Process
3500	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

02854599.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\b2be364e-31aa-400e-8859-846aa4941812\\02854599.exe\" --AutoStart"	02854599.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
6	api.2ip.ua
7	api.2ip.ua
21	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

Processes:

02854599.exe02854599.exe

description	pid	Process	procid_target
PID 3556 set thread context of 4356	3556	02854599.exe	82
PID 4488 set thread context of 4124	4488	02854599.exe	86

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

02854599.exe02854599.exeicacls.exe02854599.exe02854599.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	02854599.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	02854599.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	02854599.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	02854599.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

02854599.exe02854599.exe

pid	Process
4356	02854599.exe
4356	02854599.exe
4124	02854599.exe
4124	02854599.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

02854599.exe02854599.exe02854599.exe

description	pid	Process	procid_target
PID 3556 wrote to memory of 4356	3556	02854599.exe	82
PID 3556 wrote to memory of 4356	3556	02854599.exe	82
PID 3556 wrote to memory of 4356	3556	02854599.exe	82
PID 3556 wrote to memory of 4356	3556	02854599.exe	82
PID 3556 wrote to memory of 4356	3556	02854599.exe	82
PID 3556 wrote to memory of 4356	3556	02854599.exe	82
PID 3556 wrote to memory of 4356	3556	02854599.exe	82
PID 3556 wrote to memory of 4356	3556	02854599.exe	82
PID 3556 wrote to memory of 4356	3556	02854599.exe	82
PID 3556 wrote to memory of 4356	3556	02854599.exe	82
PID 4356 wrote to memory of 3500	4356	02854599.exe	83
PID 4356 wrote to memory of 3500	4356	02854599.exe	83
PID 4356 wrote to memory of 3500	4356	02854599.exe	83
PID 4356 wrote to memory of 4488	4356	02854599.exe	84
PID 4356 wrote to memory of 4488	4356	02854599.exe	84
PID 4356 wrote to memory of 4488	4356	02854599.exe	84
PID 4488 wrote to memory of 4124	4488	02854599.exe	86
PID 4488 wrote to memory of 4124	4488	02854599.exe	86
PID 4488 wrote to memory of 4124	4488	02854599.exe	86
PID 4488 wrote to memory of 4124	4488	02854599.exe	86
PID 4488 wrote to memory of 4124	4488	02854599.exe	86
PID 4488 wrote to memory of 4124	4488	02854599.exe	86
PID 4488 wrote to memory of 4124	4488	02854599.exe	86
PID 4488 wrote to memory of 4124	4488	02854599.exe	86
PID 4488 wrote to memory of 4124	4488	02854599.exe	86
PID 4488 wrote to memory of 4124	4488	02854599.exe	86

C:\Users\Admin\AppData\Local\Temp\02854599.exe
"C:\Users\Admin\AppData\Local\Temp\02854599.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3556
- C:\Users\Admin\AppData\Local\Temp\02854599.exe
  "C:\Users\Admin\AppData\Local\Temp\02854599.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4356
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\b2be364e-31aa-400e-8859-846aa4941812" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:3500
- - C:\Users\Admin\AppData\Local\Temp\02854599.exe
    "C:\Users\Admin\AppData\Local\Temp\02854599.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4488
  - - C:\Users\Admin\AppData\Local\Temp\02854599.exe
      "C:\Users\Admin\AppData\Local\Temp\02854599.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Checks computer location settings
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:4124

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

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12

Filesize
1KB

MD5
7fb5fa1534dcf77f2125b2403b30a0ee

SHA1
365d96812a69ac0a4611ea4b70a3f306576cc3ea

SHA256
33a39e9ec2133230533a686ec43760026e014a3828c703707acbc150fe40fd6f

SHA512
a9279fd60505a1bfeef6fb07834cad0fd5be02fd405573fc1a5f59b991e9f88f5e81c32fe910f69bdc6585e71f02559895149eaf49c25b8ff955459fd60c0d2e

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8

Filesize
436B

MD5
971c514f84bba0785f80aa1c23edfd79

SHA1
732acea710a87530c6b08ecdf32a110d254a54c8

SHA256
f157ed17fcaf8837fa82f8b69973848c9b10a02636848f995698212a08f31895

SHA512
43dc1425d80e170c645a3e3bb56da8c3acd31bd637329e9e37094ac346ac85434df4edcdbefc05ae00aea33a80a88e2af695997a495611217fe6706075a63c58

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12

Filesize
174B

MD5
c526d309f85bf1b07f8dbb010d813bab

SHA1
564d680a01a6908cbc1fb1da35a0d93479fad271

SHA256
9d96f1f66d7c84726c4b88ffd9f0a33631572454e552452879096439d310cb93

SHA512
84e22f5b9d0f8ccb9652dcfb308579e600e0f48085586d72b1dd6fbcee7da1f3a5b4aff4e750b2f62c11d54a9c1363a4ecb75fb88d27fb6de787899c8fdd5a70

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8

Filesize
170B

MD5
4795a8e61fc91f1413384c5cd5392caa

SHA1
c3c935fe196898262a5fd65f49bedc2e71f0ed48

SHA256
a696746d1d806553fd6257338126dbb789ce5ed05e7394adbc3bcc308cd8e510

SHA512
4a05cd89f09875ed145b2a5766175185a181b57606413ed992d6a4fed1574a38f0c97843ad0de6b059167a675672d7238d68dd810dd6d3118befe483c0e3576a

Download Submit
C:\Users\Admin\AppData\Local\4ddeece9-1276-461d-a184-8c1a4f8f61ce\build3.exe

Filesize
437B

MD5
6910426a598bc0b07dd6ca7c2faf5c22

SHA1
4304d65a08652b167453997e1464cc6ef034be23

SHA256
ebfef207462c29030b8a06068c8cbf1cfeae1304813b9cdbfa2d705b314bf692

SHA512
5e96757fa5daa336968aa07d5fe5525040a081a547dd6bad55bed4539ad76b3f96aabd38f461efdafa4a427963b2a3187cc40dfa60c74e6c6ddf738176381952

Download Submit
C:\Users\Admin\AppData\Local\b2be364e-31aa-400e-8859-846aa4941812\02854599.exe

Filesize
782KB

MD5
7f6667ae84281e5d97ac298efbcb6707

SHA1
1a88e2c8803884c71dc0955c7cfd942fa875617a

SHA256
4de2d00f758ece9e388f390616b66ca6581376cc674a6c2448f1bd9301246e8b

SHA512
4e3ae39b9e032328c199a165eb6fc4a8568f7debd03cf3b639e455ec138538ec6cd5381bd1525e40d141ca27fa54ccf817b3d79e0e703856717efcfe0ae25198

Download Submit
C:\Users\Admin\AppData\Local\bowsakkdestx.txt

Filesize
449B

MD5
caa078f0348cda98328127c142e3bfed

SHA1
e38274d642c806a3affcca8f7e37b61f591c47e6

SHA256
91faeb982f34313750a83d74c5464abe4e01357d1a7ea4253973509bc0e9d219

SHA512
2e6a5c482b5226079c6b4bd9a706537c372a3b43962f64be6bdd281e3217f963316ef0eba38164890bdf14af6558eb26605320487f0a0c841be9bb813c2ee5d6

Download Submit
memory/3556-2-0x0000000002480000-0x000000000259B000-memory.dmp

Filesize
1.1MB

Download
memory/3556-1-0x0000000000910000-0x00000000009AC000-memory.dmp

Filesize
624KB

Download
memory/4124-51-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4124-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4124-68-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4124-23-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4124-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4124-67-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4124-66-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4124-65-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4124-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4124-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4124-63-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4124-45-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4124-62-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4356-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4356-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4356-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4356-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4356-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4488-19-0x0000000000400000-0x0000000000741000-memory.dmp

Filesize
3.3MB

Download
memory/4488-24-0x0000000000400000-0x0000000000741000-memory.dmp

Filesize
3.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads