djvu | be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4b

General

Target

be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe
Size

766KB
MD5

a0218a67b0d9faf2721cae2bde1d1a10
SHA1

6ca3ebd170d21e6e9b572f2386bb828d0afcba4a
SHA256

be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4b
SHA512

d7ce12cee7d3eb85e09139741d77b5a2a3d203d1a10aa620d3b4a17668317dc28248a84f0c0a20ce165c1f32804e6b6b2cde90e59e8ccb3ee8e3f9b5d3d7fdd9
SSDEEP

12288:nKDiXNmHNpcGWH69SIW5JBvOwcMBl4tT5jVXctOpctHni7LEwv:nMiXNKNpM6jW5JDcIit+OpAHUEw

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.held
offline_id
vyhLHcV0DMKjS0CgDoJGF0yJ299laBK7lZQM9Tt1
payload_url
ransomnote
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rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

resource	yara_rule
behavioral2/memory/2432-2-0x0000000002710000-0x000000000282B000-memory.dmp	family_djvu
behavioral2/memory/3776-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3776-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3776-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3776-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3776-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3500-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3500-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3500-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3500-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3500-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3500-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3500-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3500-46-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3500-48-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3500-49-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3500-50-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
Djvu family
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-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1180	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-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\fe61c062-faaf-45cd-b8ac-49f9d24b232b\\be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe\" --AutoStart"	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.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.

flow	ioc
8	api.2ip.ua
9	api.2ip.ua
20	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2432 set thread context of 3776	2432	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe	82
PID 2672 set thread context of 3500	2672	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3776	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe
3776	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe
3500	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe
3500	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2432 wrote to memory of 3776	2432	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe	82
PID 2432 wrote to memory of 3776	2432	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe	82
PID 2432 wrote to memory of 3776	2432	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe	82
PID 2432 wrote to memory of 3776	2432	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe	82
PID 2432 wrote to memory of 3776	2432	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe	82
PID 2432 wrote to memory of 3776	2432	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe	82
PID 2432 wrote to memory of 3776	2432	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe	82
PID 2432 wrote to memory of 3776	2432	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe	82
PID 2432 wrote to memory of 3776	2432	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe	82
PID 2432 wrote to memory of 3776	2432	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe	82
PID 3776 wrote to memory of 1180	3776	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe	83
PID 3776 wrote to memory of 1180	3776	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe	83
PID 3776 wrote to memory of 1180	3776	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe	83
PID 3776 wrote to memory of 2672	3776	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe	84
PID 3776 wrote to memory of 2672	3776	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe	84
PID 3776 wrote to memory of 2672	3776	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe	84
PID 2672 wrote to memory of 3500	2672	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe	86
PID 2672 wrote to memory of 3500	2672	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe	86
PID 2672 wrote to memory of 3500	2672	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe	86
PID 2672 wrote to memory of 3500	2672	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe	86
PID 2672 wrote to memory of 3500	2672	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe	86
PID 2672 wrote to memory of 3500	2672	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe	86
PID 2672 wrote to memory of 3500	2672	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe	86
PID 2672 wrote to memory of 3500	2672	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe	86
PID 2672 wrote to memory of 3500	2672	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe	86
PID 2672 wrote to memory of 3500	2672	be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe	86

C:\Users\Admin\AppData\Local\Temp\be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe
"C:\Users\Admin\AppData\Local\Temp\be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2432
- C:\Users\Admin\AppData\Local\Temp\be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe
  "C:\Users\Admin\AppData\Local\Temp\be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.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:3776
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\fe61c062-faaf-45cd-b8ac-49f9d24b232b" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:1180
- - C:\Users\Admin\AppData\Local\Temp\be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe
    "C:\Users\Admin\AppData\Local\Temp\be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2672
  - - C:\Users\Admin\AppData\Local\Temp\be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe
      "C:\Users\Admin\AppData\Local\Temp\be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:3500

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
c9be626e9715952e9b70f92f912b9787

SHA1
aa2e946d9ad9027172d0d321917942b7562d6abe

SHA256
c13e8d22800c200915f87f71c31185053e4e60ca25de2e41e160e09cd2d815d4

SHA512
7581b7c593785380e9db3ae760af85c1a889f607a3cd2aa5a2695a0e5a0fe8ee751578e88f7d8c997faeda804e2fc2655d859bee2832eace526ed4379edaa3f5

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
f5ac110a107c9849a76615ea7ec44260

SHA1
937b2456d300d8814de79803b553944df255f98c

SHA256
a31269708637afd33ae29893badb14ae69e00c432b4b0713dd274cb24a4ff114

SHA512
41db4561ec29ada2f134ac2494b504d78d6c1eefb78a1463d74e305aebbef45362107639976ddea8ee03740e080b07125fa6ea9c75350e4c8560cc9227cb0f67

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

Filesize
170B

MD5
f3780ce77674c30acfef3504030f0932

SHA1
b8de786a92ef1389794005b6db37ef1b7348aa1f

SHA256
6dbf9278fd942aa1d72174082585d95fc1d6de0b3efbc735b66ea5b11b37fca9

SHA512
64c940c7891fc4e4dfdb9e245c967dad45c273616d3a8b858bb6edff7e3962b09dd2aa428f1ea4999f782b873fbfbdc6e713b0c441f68b53f1bc549afbdf0e62

Download Submit
C:\Users\Admin\AppData\Local\fe61c062-faaf-45cd-b8ac-49f9d24b232b\be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4bN.exe

Filesize
766KB

MD5
a0218a67b0d9faf2721cae2bde1d1a10

SHA1
6ca3ebd170d21e6e9b572f2386bb828d0afcba4a

SHA256
be3d44217a6e68c19c91cf9bc4eefb6ec537a0e70fe3d3095519fd3dec9f9b4b

SHA512
d7ce12cee7d3eb85e09139741d77b5a2a3d203d1a10aa620d3b4a17668317dc28248a84f0c0a20ce165c1f32804e6b6b2cde90e59e8ccb3ee8e3f9b5d3d7fdd9

Download Submit
memory/2432-2-0x0000000002710000-0x000000000282B000-memory.dmp

Filesize
1.1MB

Download
memory/2432-1-0x0000000002670000-0x0000000002702000-memory.dmp

Filesize
584KB

Download
memory/2672-23-0x0000000000400000-0x0000000000898000-memory.dmp

Filesize
4.6MB

Download
memory/2672-25-0x0000000000400000-0x0000000000898000-memory.dmp

Filesize
4.6MB

Download
memory/3500-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3500-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3500-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3500-50-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3500-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3500-49-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3500-48-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3500-46-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3500-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3500-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3500-33-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3776-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3776-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3776-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3776-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3776-19-0x0000000000400000-0x0000000000537000-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