djvu | d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0

General

Target

d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe
Size

814KB
MD5

ad4fca578b894e89272a48eee7fa5886
SHA1

a0a1a4f505c21ed245a607a8b0c46fb7d824d105
SHA256

d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0
SHA512

454a583d2be74e5b9e1514da4a28b67d568f4822e22e885c196d8435a4fa32280b166ac2d072d756a78c20ddc1798f9961a33aaef18012adb4ea0c2374e5303a
SSDEEP

12288:lMqpTaq968wBCSqCKRj5UdtAoOd9BozBMNV3/WeMM+1qjqD1S9g7J:vl6VBENj5oOqzBMn3/W9JE5g7J

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.vook
offline_id
1eSPzWRaNslCgtjBZfL5pzvovoiaVI4IZSnvAwt1
payload_url
http://sdfjhuz.com/dl/build2.exe

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

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral2/memory/484-2-0x0000000004D30000-0x0000000004E4B000-memory.dmp	family_djvu
behavioral2/memory/6012-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/6012-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/6012-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/6012-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/6012-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1888-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1888-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1888-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1888-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1888-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1888-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1888-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1888-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1888-37-0x0000000000400000-0x0000000000537000-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-1-5-21-814918696-1585701690-3140955116-1000\Control Panel\International\Geo\Nation	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1932	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-1-5-21-814918696-1585701690-3140955116-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\a4bbfd9f-0378-42e5-9404-43bc8b5cf4ce\\d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe\" --AutoStart"	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.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
1	api.2ip.ua
2	api.2ip.ua
14	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 484 set thread context of 6012	484	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe	85
PID 2964 set thread context of 1888	2964	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe	92

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	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
6012	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe
6012	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe
1888	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe
1888	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 484 wrote to memory of 6012	484	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe	85
PID 484 wrote to memory of 6012	484	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe	85
PID 484 wrote to memory of 6012	484	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe	85
PID 484 wrote to memory of 6012	484	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe	85
PID 484 wrote to memory of 6012	484	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe	85
PID 484 wrote to memory of 6012	484	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe	85
PID 484 wrote to memory of 6012	484	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe	85
PID 484 wrote to memory of 6012	484	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe	85
PID 484 wrote to memory of 6012	484	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe	85
PID 484 wrote to memory of 6012	484	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe	85
PID 6012 wrote to memory of 1932	6012	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe	89
PID 6012 wrote to memory of 1932	6012	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe	89
PID 6012 wrote to memory of 1932	6012	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe	89
PID 6012 wrote to memory of 2964	6012	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe	90
PID 6012 wrote to memory of 2964	6012	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe	90
PID 6012 wrote to memory of 2964	6012	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe	90
PID 2964 wrote to memory of 1888	2964	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe	92
PID 2964 wrote to memory of 1888	2964	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe	92
PID 2964 wrote to memory of 1888	2964	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe	92
PID 2964 wrote to memory of 1888	2964	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe	92
PID 2964 wrote to memory of 1888	2964	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe	92
PID 2964 wrote to memory of 1888	2964	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe	92
PID 2964 wrote to memory of 1888	2964	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe	92
PID 2964 wrote to memory of 1888	2964	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe	92
PID 2964 wrote to memory of 1888	2964	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe	92
PID 2964 wrote to memory of 1888	2964	d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe	92

C:\Users\Admin\AppData\Local\Temp\d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe
"C:\Users\Admin\AppData\Local\Temp\d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:484
- C:\Users\Admin\AppData\Local\Temp\d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe
  "C:\Users\Admin\AppData\Local\Temp\d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.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:6012
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\a4bbfd9f-0378-42e5-9404-43bc8b5cf4ce" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:1932
- - C:\Users\Admin\AppData\Local\Temp\d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe
    "C:\Users\Admin\AppData\Local\Temp\d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2964
  - - C:\Users\Admin\AppData\Local\Temp\d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe
      "C:\Users\Admin\AppData\Local\Temp\d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:1888

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
c6b88780069ba9000ce6f9543a66751f

SHA1
dfc87ba1fc760e945117e2c75a376f7e45e049fe

SHA256
e53c30854f90807147cabc83c4d175cfb7fe3406b327d0ea0ca15a41899aad3c

SHA512
667cc56dab4cf0c0d47e849456c7a795ea643e2f64496615f25b549ee786dd7d9bb26f7a3d3e7f9dab4bf5183fbcceda6e3299c8c97dc0faca0c2716bd9561e0

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

Filesize
170B

MD5
088b69b12cf043417cb5735b522bc3df

SHA1
0c8e9da305ba2d42f4d75287bbe92d3341b692c3

SHA256
ee0f501339a1e91f77a9af7536c51d0073a5b64e29c0ef9dad3d54751c69da65

SHA512
04e41a5889f2c883f4dbf424c0093f9fefa9fc848604f0ebd2d2b16c10cf5c020d30ddd4e84f2ad28f67869d1512567651236be62fd0ff337b7fe86cf29e684b

Download Submit
C:\Users\Admin\AppData\Local\a4bbfd9f-0378-42e5-9404-43bc8b5cf4ce\d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0.exe

Filesize
814KB

MD5
ad4fca578b894e89272a48eee7fa5886

SHA1
a0a1a4f505c21ed245a607a8b0c46fb7d824d105

SHA256
d88d0746c4a81d9e858c8d34797799e11b93772bd186548fad99643e14461de0

SHA512
454a583d2be74e5b9e1514da4a28b67d568f4822e22e885c196d8435a4fa32280b166ac2d072d756a78c20ddc1798f9961a33aaef18012adb4ea0c2374e5303a

Download Submit
memory/484-2-0x0000000004D30000-0x0000000004E4B000-memory.dmp

Filesize
1.1MB

Download
memory/484-1-0x0000000002FA0000-0x000000000303C000-memory.dmp

Filesize
624KB

Download
memory/1888-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1888-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1888-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1888-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1888-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1888-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1888-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1888-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1888-33-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/6012-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/6012-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/6012-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/6012-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/6012-20-0x0000000000400000-0x0000000000537000-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