djvu | e01c0429a58b33013305aab35ef863cd2b88962e479e39566a687ca37c68510f

General

Target

buildz.exe
Size

709KB
MD5

b7cb7f2b5cd9bd047710650295dc88f7
SHA1

3740ba8e89055cb0f5068ec9176b05c77432e799
SHA256

e01c0429a58b33013305aab35ef863cd2b88962e479e39566a687ca37c68510f
SHA512

e6bd45366d067dcc6cdcdc4d917c4e819942caccf22b64a1b1cf45199cdbf58defa0773a8d6a76c0672db2824a724018253efb0db1a0baf0c2f105d07758b471
SSDEEP

12288:9CwgCcyMy1Nncixi2NWXCAcrIQBjljKsFKfFDKZNF:9cCp9KGiAAcUwjljKAK8ZNF

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.qual
offline_id
KLbRmn6on3AXGFgDLGtd0IkHmV7uHw9VxlcxO5t1
payload_url
ransomnote
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rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

Processes:

resource	yara_rule
behavioral3/memory/1356-2-0x00000000023D0000-0x00000000024EB000-memory.dmp	family_djvu
behavioral3/memory/3172-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral3/memory/3172-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral3/memory/3172-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral3/memory/3172-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral3/memory/3172-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral3/memory/1340-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral3/memory/1340-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral3/memory/1340-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral3/memory/1340-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral3/memory/1340-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral3/memory/1340-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral3/memory/1340-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral3/memory/1340-41-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral3/memory/1340-42-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral3/memory/1340-43-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral3/memory/1340-44-0x0000000000400000-0x0000000000537000-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:

buildz.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation buildz.exe
Modifies file permissions 1 TTPs 1 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

icacls.exe

pid process

4916 icacls.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	buildz.exe

pid	process
4916	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

buildz.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\25540144-33e0-4c26-95cc-c5c617b4771f\\buildz.exe\" --AutoStart"	buildz.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

9 api.2ip.ua
15 api.2ip.ua
8 api.2ip.ua

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

Suspicious use of SetThreadContext 2 IoCs

Processes:

buildz.exebuildz.exe

description	pid	process	target process
PID 1356 set thread context of 3172	1356	buildz.exe	buildz.exe
PID 3592 set thread context of 1340	3592	buildz.exe	buildz.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:

icacls.exebuildz.exebuildz.exebuildz.exebuildz.exe

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

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

buildz.exebuildz.exe

pid process

3172 buildz.exe
3172 buildz.exe
1340 buildz.exe
1340 buildz.exe

pid	process
3172	buildz.exe
3172	buildz.exe
1340	buildz.exe
1340	buildz.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

buildz.exebuildz.exebuildz.exe

description	pid	process	target process
PID 1356 wrote to memory of 3172	1356	buildz.exe	buildz.exe
PID 1356 wrote to memory of 3172	1356	buildz.exe	buildz.exe
PID 1356 wrote to memory of 3172	1356	buildz.exe	buildz.exe
PID 1356 wrote to memory of 3172	1356	buildz.exe	buildz.exe
PID 1356 wrote to memory of 3172	1356	buildz.exe	buildz.exe
PID 1356 wrote to memory of 3172	1356	buildz.exe	buildz.exe
PID 1356 wrote to memory of 3172	1356	buildz.exe	buildz.exe
PID 1356 wrote to memory of 3172	1356	buildz.exe	buildz.exe
PID 1356 wrote to memory of 3172	1356	buildz.exe	buildz.exe
PID 1356 wrote to memory of 3172	1356	buildz.exe	buildz.exe
PID 3172 wrote to memory of 4916	3172	buildz.exe	icacls.exe
PID 3172 wrote to memory of 4916	3172	buildz.exe	icacls.exe
PID 3172 wrote to memory of 4916	3172	buildz.exe	icacls.exe
PID 3172 wrote to memory of 3592	3172	buildz.exe	buildz.exe
PID 3172 wrote to memory of 3592	3172	buildz.exe	buildz.exe
PID 3172 wrote to memory of 3592	3172	buildz.exe	buildz.exe
PID 3592 wrote to memory of 1340	3592	buildz.exe	buildz.exe
PID 3592 wrote to memory of 1340	3592	buildz.exe	buildz.exe
PID 3592 wrote to memory of 1340	3592	buildz.exe	buildz.exe
PID 3592 wrote to memory of 1340	3592	buildz.exe	buildz.exe
PID 3592 wrote to memory of 1340	3592	buildz.exe	buildz.exe
PID 3592 wrote to memory of 1340	3592	buildz.exe	buildz.exe
PID 3592 wrote to memory of 1340	3592	buildz.exe	buildz.exe
PID 3592 wrote to memory of 1340	3592	buildz.exe	buildz.exe
PID 3592 wrote to memory of 1340	3592	buildz.exe	buildz.exe
PID 3592 wrote to memory of 1340	3592	buildz.exe	buildz.exe

C:\Users\Admin\AppData\Local\Temp\buildz.exe
"C:\Users\Admin\AppData\Local\Temp\buildz.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1356
- C:\Users\Admin\AppData\Local\Temp\buildz.exe
  "C:\Users\Admin\AppData\Local\Temp\buildz.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:3172
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\25540144-33e0-4c26-95cc-c5c617b4771f" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:4916
- - C:\Users\Admin\AppData\Local\Temp\buildz.exe
    "C:\Users\Admin\AppData\Local\Temp\buildz.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3592
  - - C:\Users\Admin\AppData\Local\Temp\buildz.exe
      "C:\Users\Admin\AppData\Local\Temp\buildz.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:1340

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
8324bea873221f097aea0f51aa66ce60

SHA1
f3d356d0662fc08dc4cbcaa9ef864e5da2e85280

SHA256
28ba66d84dbc1b17542fcd62f4ffbf65f1b6fd902147ac7879078fd0727e38c2

SHA512
f1704bb4eec2f71a0ec7104d6315ef8bb4cfc35bb29b0671e37f3b0ae1d801e213d5e7bf59d2f28afc1e4db2431e58dc62db2695b717a0b0ad316e75baf5bff9

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

Filesize
170B

MD5
95613dc6e836087dcf8f557c5b0f5a03

SHA1
8185abe0ab4372662e50b8a27671ca1c9249f058

SHA256
513feb9763a35d41bef6be3c879083da7af207a45cbf28609e5bfd010a337ffb

SHA512
7e50bd99b1858b65c4e638dfd58828cc7c882b307f313a4ffa359f902a24df979a44768696302d2a1e88a325617026a8fc19f57e1e936adbd874b2f90da286cd

Download Submit
C:\Users\Admin\AppData\Local\25540144-33e0-4c26-95cc-c5c617b4771f\buildz.exe

Filesize
709KB

MD5
b7cb7f2b5cd9bd047710650295dc88f7

SHA1
3740ba8e89055cb0f5068ec9176b05c77432e799

SHA256
e01c0429a58b33013305aab35ef863cd2b88962e479e39566a687ca37c68510f

SHA512
e6bd45366d067dcc6cdcdc4d917c4e819942caccf22b64a1b1cf45199cdbf58defa0773a8d6a76c0672db2824a724018253efb0db1a0baf0c2f105d07758b471

Download Submit
memory/1340-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1340-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1340-44-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1340-43-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1340-23-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1340-42-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1340-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1340-41-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1340-39-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1340-33-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1340-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1356-1-0x00000000007A0000-0x000000000083C000-memory.dmp

Filesize
624KB

Download
memory/1356-2-0x00000000023D0000-0x00000000024EB000-memory.dmp

Filesize
1.1MB

Download
memory/3172-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3172-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3172-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3172-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3172-19-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3592-25-0x0000000000400000-0x0000000000541000-memory.dmp

Filesize
1.3MB

Download
memory/3592-21-0x0000000000400000-0x0000000000541000-memory.dmp

Filesize
1.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads