djvu | 9d45043266ad627224c951cb91f37261bc7bd393aa8ce87a39e8b42f3a543dbf

General

Target

615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe
Size

773KB
MD5

615fc4386c424b7cfd695ea56244b90c
SHA1

a4e961c34abcfc25c348a29ac647a1f6b357f7d5
SHA256

9d45043266ad627224c951cb91f37261bc7bd393aa8ce87a39e8b42f3a543dbf
SHA512

0e51a60826a6ab416f2a19b437ff543f0b6818bc6a501907fa6eb2c70d4c8035ad9fa549c26f53dee426af663f8945a065a2d332d7c047d92b9c2aa78814d2fe
SSDEEP

12288:Gs9OFhQ8y+cdylI0Ec5i1uAA9MQ7gwn+D79xS5nR+T9gghW7GGWAu9E329C5zT:Gs9Ojg6lREzeMrwn3nWGghWpa9G

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://astdg.top/fhsgtsspen6/get.php

Attributes

extension
.nooa
offline_id
PLtnD1U6oAmgxgJ2nJik1mY9SwUQg07CiN0zSet1
payload_url
http://securebiz.org/dl/build2.exe

http://astdg.top/files/1/build3.exe
ransomnote
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rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4460-2-0x00000000049D0000-0x0000000004AEB000-memory.dmp	family_djvu
behavioral2/memory/1768-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1768-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1768-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1768-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1768-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5104-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5104-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5104-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5104-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5104-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5104-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5104-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5104-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5104-39-0x0000000000400000-0x0000000000537000-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

Processes:

615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe

Modifies file permissions 1 TTPs 1 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

icacls.exe

pid process

3056 icacls.exe

pid	process
3056	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\4f68f87b-278f-4165-852b-651a9e7f43a1\\615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe\" --AutoStart"	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.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

12 api.2ip.ua
13 api.2ip.ua
28 api.2ip.ua

flow	ioc
12	api.2ip.ua
13	api.2ip.ua
28	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

Processes:

615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe

description	pid	process	target process
PID 4460 set thread context of 1768	4460	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe
PID 4100 set thread context of 5104	4100	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe

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:

615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exeicacls.exe615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe

pid	process
1768	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe
1768	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe
5104	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe
5104	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe

C:\Users\Admin\AppData\Local\Temp\615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4460
- C:\Users\Admin\AppData\Local\Temp\615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.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:1768
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\4f68f87b-278f-4165-852b-651a9e7f43a1" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:3056
- - C:\Users\Admin\AppData\Local\Temp\615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4100
  - - C:\Users\Admin\AppData\Local\Temp\615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe
      "C:\Users\Admin\AppData\Local\Temp\615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:5104

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
67e486b2f148a3fca863728242b6273e

SHA1
452a84c183d7ea5b7c015b597e94af8eef66d44a

SHA256
facaf1c3a4bf232abce19a2d534e495b0d3adc7dbe3797d336249aa6f70adcfb

SHA512
d3a37da3bb10a9736dc03e8b2b49baceef5d73c026e2077b8ebc1b786f2c9b2f807e0aa13a5866cf3b3cafd2bc506242ef139c423eaffb050bbb87773e53881e

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
252bf380c82cf6f1e0d7066626d4d6ef

SHA1
714ea6dcc738e3bed44b14a845f7816c6fdd20e6

SHA256
18ca5da4b9472fdc2234023b0bdae9aeb9ace005627d797b25e9d20b2d2e5310

SHA512
98862a89b88eabf4d648a42660eec10062fe3cf04b14080d618408a07ed6df7e33ced8bfc2f220247ed2498ce0a2334ff608189cf214d0ece94bc75aadafd1b8

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

Filesize
170B

MD5
95432dec5363fc3194693c258be66df4

SHA1
43c4b034f118f9eb084a03bfc1706e89f7480f90

SHA256
c8e41811ef9f3126a29f2bca9f591549754371591b76c0838077ff83d5ca9ca3

SHA512
1407f2141b134b65dcc21aaf4022cfc703ac9ad37a6aabd7ab4998ca6d8a91746e4ed0afbcd408d5ec17397b8bbd197e954abccccb09d589884a1d06f5f0c827

Download Submit
C:\Users\Admin\AppData\Local\4f68f87b-278f-4165-852b-651a9e7f43a1\615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe

Filesize
773KB

MD5
615fc4386c424b7cfd695ea56244b90c

SHA1
a4e961c34abcfc25c348a29ac647a1f6b357f7d5

SHA256
9d45043266ad627224c951cb91f37261bc7bd393aa8ce87a39e8b42f3a543dbf

SHA512
0e51a60826a6ab416f2a19b437ff543f0b6818bc6a501907fa6eb2c70d4c8035ad9fa549c26f53dee426af663f8945a065a2d332d7c047d92b9c2aa78814d2fe

Download Submit
memory/1768-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1768-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1768-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1768-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1768-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4460-2-0x00000000049D0000-0x0000000004AEB000-memory.dmp

Filesize
1.1MB

Download
memory/4460-1-0x0000000002E80000-0x0000000002F15000-memory.dmp

Filesize
596KB

Download
memory/5104-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5104-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5104-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5104-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5104-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5104-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5104-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5104-38-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/5104-39-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

description	pid	process	target process
PID 4460 wrote to memory of 1768	4460	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe
PID 4460 wrote to memory of 1768	4460	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe
PID 4460 wrote to memory of 1768	4460	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe
PID 4460 wrote to memory of 1768	4460	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe
PID 4460 wrote to memory of 1768	4460	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe
PID 4460 wrote to memory of 1768	4460	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe
PID 4460 wrote to memory of 1768	4460	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe
PID 4460 wrote to memory of 1768	4460	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe
PID 4460 wrote to memory of 1768	4460	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe
PID 4460 wrote to memory of 1768	4460	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe
PID 1768 wrote to memory of 3056	1768	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe	icacls.exe
PID 1768 wrote to memory of 3056	1768	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe	icacls.exe
PID 1768 wrote to memory of 3056	1768	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe	icacls.exe
PID 1768 wrote to memory of 4100	1768	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe
PID 1768 wrote to memory of 4100	1768	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe
PID 1768 wrote to memory of 4100	1768	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe
PID 4100 wrote to memory of 5104	4100	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe
PID 4100 wrote to memory of 5104	4100	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe
PID 4100 wrote to memory of 5104	4100	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe
PID 4100 wrote to memory of 5104	4100	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe
PID 4100 wrote to memory of 5104	4100	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe
PID 4100 wrote to memory of 5104	4100	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe
PID 4100 wrote to memory of 5104	4100	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe
PID 4100 wrote to memory of 5104	4100	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe
PID 4100 wrote to memory of 5104	4100	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe
PID 4100 wrote to memory of 5104	4100	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe	615fc4386c424b7cfd695ea56244b90c_JaffaCakes118.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads