strrat | d72e9e277f3eadd7b9097a7f8d1d00f905d97df92bbf66982e51899a9d6eec60

Analysis

max time kernel
145s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20230221-en
resource tags

arch:x64arch:x86image:win10v2004-20230221-enlocale:en-usos:windows10-2004-x64system
submitted
09-04-2023 07:08

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General

Target

AWB#476587652.PDF.js
Size

3.3MB
MD5

0d0b1fc606201ddbf74b4833e08994b3
SHA1

177895061db3b2264b72bd57b96e707e7a3e50b8
SHA256

d72e9e277f3eadd7b9097a7f8d1d00f905d97df92bbf66982e51899a9d6eec60
SHA512

45fef7799272fc8606a50c7f75c280a121beb92119f11c00db6155c8b084ae69635c0201fdd96fa0398e33b43f30333767940a75bd5fb88908fb4050160f37b6
SSDEEP

24576:pJSd1V8/DH6mBy0ayVbGw9GZ0dKEMRs1Ayq+cISRxQCNj+4AX:ntbNX

Score

10^/10

strrat vjw0rm persistence stealer trojan worm

Malware Config

Signatures

STRRAT
STRRAT is a remote access tool than can steal credentials and log keystrokes.
trojan stealer strrat
Vjw0rm
Vjw0rm is a remote access trojan written in JavaScript.
trojan worm vjw0rm

Blocklisted process makes network request 6 IoCs

flow	pid	Process
16	2760	WScript.exe
29	2760	WScript.exe
44	2760	WScript.exe
53	2760	WScript.exe
55	2760	WScript.exe
63	2760	WScript.exe

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-1-5-21-2805025096-2326403612-4231045514-1000\Control Panel\International\Geo\Nation	wscript.exe

Drops startup file 3 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\FAklApsLii.js	WScript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\FAklApsLii.js	WScript.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ndefnjjtxl.txt	java.exe

Loads dropped DLL 1 IoCs

pid	Process
4332	java.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ndefnjjtxl = "\"C:\\Users\\Admin\\AppData\\Roaming\\ndefnjjtxl.txt\""	java.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ndefnjjtxl = "\"C:\\Users\\Admin\\AppData\\Roaming\\ndefnjjtxl.txt\""	java.exe

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
3448	schtasks.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000_Classes\Local Settings	wscript.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4812 wrote to memory of 2760	4812	wscript.exe	85
PID 4812 wrote to memory of 2760	4812	wscript.exe	85
PID 4812 wrote to memory of 3444	4812	wscript.exe	86
PID 4812 wrote to memory of 3444	4812	wscript.exe	86
PID 3444 wrote to memory of 3724	3444	javaw.exe	94
PID 3444 wrote to memory of 3724	3444	javaw.exe	94
PID 3724 wrote to memory of 4088	3724	java.exe	96
PID 3724 wrote to memory of 4088	3724	java.exe	96
PID 3724 wrote to memory of 4332	3724	java.exe	97
PID 3724 wrote to memory of 4332	3724	java.exe	97
PID 4088 wrote to memory of 3448	4088	cmd.exe	100
PID 4088 wrote to memory of 3448	4088	cmd.exe	100

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\AWB#476587652.PDF.js
1⤵
- Checks computer location settings
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4812
- C:\Windows\System32\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\FAklApsLii.js"
  2⤵
  - Blocklisted process makes network request
  - Drops startup file
  PID:2760
- C:\Program Files\Java\jre1.8.0_66\bin\javaw.exe
  "C:\Program Files\Java\jre1.8.0_66\bin\javaw.exe" -jar "C:\Users\Admin\AppData\Roaming\ndefnjjtxl.txt"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3444
- - C:\Program Files\Java\jre1.8.0_66\bin\java.exe
    "C:\Program Files\Java\jre1.8.0_66\bin\java.exe" -jar "C:\Users\Admin\ndefnjjtxl.txt"
    3⤵
    - Drops startup file
    - Adds Run key to start application
    - Suspicious use of WriteProcessMemory
    PID:3724
  - - C:\Windows\SYSTEM32\cmd.exe
      cmd /c schtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\ndefnjjtxl.txt"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4088
    - - C:\Windows\system32\schtasks.exe
        
        schtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\ndefnjjtxl.txt"
        5⤵
        Creates scheduled task(s)
        
        PID:3448
  - - C:\Program Files\Java\jre1.8.0_66\bin\java.exe
      "C:\Program Files\Java\jre1.8.0_66\bin\java.exe" -jar "C:\Users\Admin\AppData\Roaming\ndefnjjtxl.txt"
      4⤵
      Loads dropped DLL
      PID:4332

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\.oracle_jre_usage\90737d32e3aba4b.timestamp

Filesize
50B

MD5
381c3d636ff0bbf2ebb5089c1802a61e

SHA1
9f08059a34caabdcd620eb6ce28b241f7405c1bd

SHA256
76fbf1afce5edad7483cde11af27096377c457d604e9c655212afcefd50fdf44

SHA512
ec8bc2bcc412e8c2ec8a64597b13f8de6e097f7ac5567aabb0decca94a22a4f1fbe40d68cee65b43c54bcf563897ae5e9d7df148f24b15bfc43b4c427ae60605

Download Submit
C:\Users\Admin\.oracle_jre_usage\90737d32e3aba4b.timestamp

Filesize
50B

MD5
1c5a3c9c144f1aacd6bc674705f489a2

SHA1
87985c6261a076427152d4f4bb6e756af1d3c819

SHA256
60ec1ebe05b2a04d9712ba5546dc2c0f716149c54665f778d2597fbee76ac0a5

SHA512
bd8338d1a42b93aa5c975c62dd1e046c4bfc03ff043caaf074b01b67f1843189c8bd7427310119c54bc8173c5eb58ab80c85d8dbf3c2c976bc8e76af1c2f9bb2

Download Submit
C:\Users\Admin\AppData\Local\Temp\jna-63116079\jna3397329367897657806.dll

Filesize
241KB

MD5
e02979ecd43bcc9061eb2b494ab5af50

SHA1
3122ac0e751660f646c73b10c4f79685aa65c545

SHA256
a66959bec2ef5af730198db9f3b3f7cab0d4ae70ce01bec02bf1d738e6d1ee7a

SHA512
1e6f7dcb6a557c9b896412a48dd017c16f7a52fa2b9ab513593c9ecd118e86083979821ca7a3e2f098ee349200c823c759cec6599740dd391cb5f354dc29b372

Download Submit
C:\Users\Admin\AppData\Roaming\FAklApsLii.js

Filesize
346KB

MD5
504251620320ddd73e04fd077598f06b

SHA1
ed16dd17a1b3fd621083999e1697ac8d7d4e196a

SHA256
5fc4c580b97320b95dae37a9ee422735eb39b660a890d41f1631369f3f477f23

SHA512
69f290c8af09736666189ba80a4147dcaf9da793ece50a9a7523e9a27c011f8773971e2687cddc6c04b8d54a15fabdca80d9de63e62a00a4a4de26b9d2ca1157

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Crypto\RSA\S-1-5-21-2805025096-2326403612-4231045514-1000\83aa4cc77f591dfc2374580bbd95f6ba_7669410e-8e67-41c6-8402-7b5abeec199f

Filesize
45B

MD5
c8366ae350e7019aefc9d1e6e6a498c6

SHA1
5731d8a3e6568a5f2dfbbc87e3db9637df280b61

SHA256
11e6aca8e682c046c83b721eeb5c72c5ef03cb5936c60df6f4993511ddc61238

SHA512
33c980d5a638bfc791de291ebf4b6d263b384247ab27f261a54025108f2f85374b579a026e545f81395736dd40fa4696f2163ca17640dd47f1c42bc9971b18cd

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ndefnjjtxl.txt

Filesize
209KB

MD5
5908fc19ceb339ac7559095bc462e625

SHA1
c7d780b9524c732e26112d81a067a8fa664e805c

SHA256
255f2eeceeca9b1f4075e8a90a6f2ee46032ce60947b6ab612eaf347d5ae987e

SHA512
f3710dc3a78f6af0f59f78aa20f681816a50e2f7a5ccf7783e62c232476e7afe7cedffceb58df6e19a32f1282c79251fa54cadbf9a45509ec90e0cabf490ad82

Download Submit
C:\Users\Admin\AppData\Roaming\lib\jna-5.5.0.jar

Filesize
1.4MB

MD5
acfb5b5fd9ee10bf69497792fd469f85

SHA1
0e0845217c4907822403912ad6828d8e0b256208

SHA256
b308faebfe4ed409de8410e0a632d164b2126b035f6eacff968d3908cafb4d9e

SHA512
e52575f58a195ceb3bd16b9740eadf5bc5b1d4d63c0734e8e5fd1d1776aa2d068d2e4c7173b83803f95f72c0a6759ae1c9b65773c734250d4cfcdf47a19f82aa

Download Submit
C:\Users\Admin\AppData\Roaming\lib\jna-platform-5.5.0.jar

Filesize
2.6MB

MD5
2f4a99c2758e72ee2b59a73586a2322f

SHA1
af38e7c4d0fc73c23ecd785443705bfdee5b90bf

SHA256
24d81621f82ac29fcdd9a74116031f5907a2343158e616f4573bbfa2434ae0d5

SHA512
b860459a0d3bf7ccb600a03aa1d2ac0358619ee89b2b96ed723541e182b6fdab53aefef7992acb4e03fca67aa47cbe3907b1e6060a60b57ed96c4e00c35c7494

Download Submit
C:\Users\Admin\AppData\Roaming\lib\sqlite-jdbc-3.14.2.1.jar

Filesize
4.1MB

MD5
b33387e15ab150a7bf560abdc73c3bec

SHA1
66b8075784131f578ef893fd7674273f709b9a4c

SHA256
2eae3dea1c3dde6104c49f9601074b6038ff6abcf3be23f4b56f6720a4f6a491

SHA512
25cfb0d6ce35d0bcb18527d3aa12c63ecb2d9c1b8b78805d1306e516c13480b79bb0d74730aa93bd1752f9ac2da9fdd51781c48844cea2fd52a06c62852c8279

Download Submit
C:\Users\Admin\AppData\Roaming\lib\system-hook-3.5.jar

Filesize
772KB

MD5
e1aa38a1e78a76a6de73efae136cdb3a

SHA1
c463da71871f780b2e2e5dba115d43953b537daf

SHA256
2ddda8af6faef8bde46acf43ec546603180bcf8dcb2e5591fff8ac9cd30b5609

SHA512
fee16fe9364926ec337e52f551fd62ed81984808a847de2fd68ff29b6c5da0dcc04ef6d8977f0fe675662a7d2ea1065cdcdd2a5259446226a7c7c5516bd7d60d

Download Submit
C:\Users\Admin\AppData\Roaming\ndefnjjtxl.txt

Filesize
209KB

MD5
5908fc19ceb339ac7559095bc462e625

SHA1
c7d780b9524c732e26112d81a067a8fa664e805c

SHA256
255f2eeceeca9b1f4075e8a90a6f2ee46032ce60947b6ab612eaf347d5ae987e

SHA512
f3710dc3a78f6af0f59f78aa20f681816a50e2f7a5ccf7783e62c232476e7afe7cedffceb58df6e19a32f1282c79251fa54cadbf9a45509ec90e0cabf490ad82

Download Submit
C:\Users\Admin\AppData\Roaming\ndefnjjtxl.txt

Filesize
209KB

MD5
5908fc19ceb339ac7559095bc462e625

SHA1
c7d780b9524c732e26112d81a067a8fa664e805c

SHA256
255f2eeceeca9b1f4075e8a90a6f2ee46032ce60947b6ab612eaf347d5ae987e

SHA512
f3710dc3a78f6af0f59f78aa20f681816a50e2f7a5ccf7783e62c232476e7afe7cedffceb58df6e19a32f1282c79251fa54cadbf9a45509ec90e0cabf490ad82

Download Submit
C:\Users\Admin\lib\jna-5.5.0.jar

Filesize
1.4MB

MD5
acfb5b5fd9ee10bf69497792fd469f85

SHA1
0e0845217c4907822403912ad6828d8e0b256208

SHA256
b308faebfe4ed409de8410e0a632d164b2126b035f6eacff968d3908cafb4d9e

SHA512
e52575f58a195ceb3bd16b9740eadf5bc5b1d4d63c0734e8e5fd1d1776aa2d068d2e4c7173b83803f95f72c0a6759ae1c9b65773c734250d4cfcdf47a19f82aa

Download Submit
C:\Users\Admin\lib\jna-platform-5.5.0.jar

Filesize
2.6MB

MD5
2f4a99c2758e72ee2b59a73586a2322f

SHA1
af38e7c4d0fc73c23ecd785443705bfdee5b90bf

SHA256
24d81621f82ac29fcdd9a74116031f5907a2343158e616f4573bbfa2434ae0d5

SHA512
b860459a0d3bf7ccb600a03aa1d2ac0358619ee89b2b96ed723541e182b6fdab53aefef7992acb4e03fca67aa47cbe3907b1e6060a60b57ed96c4e00c35c7494

Download Submit
C:\Users\Admin\lib\sqlite-jdbc-3.14.2.1.jar

Filesize
4.1MB

MD5
b33387e15ab150a7bf560abdc73c3bec

SHA1
66b8075784131f578ef893fd7674273f709b9a4c

SHA256
2eae3dea1c3dde6104c49f9601074b6038ff6abcf3be23f4b56f6720a4f6a491

SHA512
25cfb0d6ce35d0bcb18527d3aa12c63ecb2d9c1b8b78805d1306e516c13480b79bb0d74730aa93bd1752f9ac2da9fdd51781c48844cea2fd52a06c62852c8279

Download Submit
C:\Users\Admin\lib\system-hook-3.5.jar

Filesize
772KB

MD5
e1aa38a1e78a76a6de73efae136cdb3a

SHA1
c463da71871f780b2e2e5dba115d43953b537daf

SHA256
2ddda8af6faef8bde46acf43ec546603180bcf8dcb2e5591fff8ac9cd30b5609

SHA512
fee16fe9364926ec337e52f551fd62ed81984808a847de2fd68ff29b6c5da0dcc04ef6d8977f0fe675662a7d2ea1065cdcdd2a5259446226a7c7c5516bd7d60d

Download Submit
C:\Users\Admin\ndefnjjtxl.txt

Filesize
209KB

MD5
5908fc19ceb339ac7559095bc462e625

SHA1
c7d780b9524c732e26112d81a067a8fa664e805c

SHA256
255f2eeceeca9b1f4075e8a90a6f2ee46032ce60947b6ab612eaf347d5ae987e

SHA512
f3710dc3a78f6af0f59f78aa20f681816a50e2f7a5ccf7783e62c232476e7afe7cedffceb58df6e19a32f1282c79251fa54cadbf9a45509ec90e0cabf490ad82

Download Submit
memory/3444-196-0x00000000009C0000-0x00000000009C1000-memory.dmp

Filesize
4KB

Download
memory/3444-210-0x00000000009C0000-0x00000000009C1000-memory.dmp

Filesize
4KB

Download
memory/3444-226-0x00000000009C0000-0x00000000009C1000-memory.dmp

Filesize
4KB

Download
memory/3444-217-0x00000000009C0000-0x00000000009C1000-memory.dmp

Filesize
4KB

Download
memory/3444-215-0x00000000009C0000-0x00000000009C1000-memory.dmp

Filesize
4KB

Download
memory/3444-212-0x00000000009C0000-0x00000000009C1000-memory.dmp

Filesize
4KB

Download
memory/3444-150-0x00000000009C0000-0x00000000009C1000-memory.dmp

Filesize
4KB

Download
memory/3444-211-0x00000000009C0000-0x00000000009C1000-memory.dmp

Filesize
4KB

Download
memory/3444-167-0x00000000009C0000-0x00000000009C1000-memory.dmp

Filesize
4KB

Download
memory/3444-232-0x00000000009C0000-0x00000000009C1000-memory.dmp

Filesize
4KB

Download
memory/3444-202-0x00000000009C0000-0x00000000009C1000-memory.dmp

Filesize
4KB

Download
memory/3444-193-0x00000000009C0000-0x00000000009C1000-memory.dmp

Filesize
4KB

Download
memory/3444-179-0x00000000009C0000-0x00000000009C1000-memory.dmp

Filesize
4KB

Download
memory/3444-177-0x00000000009C0000-0x00000000009C1000-memory.dmp

Filesize
4KB

Download
memory/3444-174-0x00000000009C0000-0x00000000009C1000-memory.dmp

Filesize
4KB

Download
memory/3724-264-0x0000000001050000-0x0000000001051000-memory.dmp

Filesize
4KB

Download
memory/3724-252-0x0000000001050000-0x0000000001051000-memory.dmp

Filesize
4KB

Download
memory/4332-282-0x0000000001170000-0x0000000001171000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads