9b17257a6ac0d7a57da4791411498aa99ec1b3065bf44720c819d851a65dc379

General

Target
924c015a8f0331ab2173d2db5ae5112924ba97b68b42deb71015e6210196fdb9.vbs
Size 223KB
Sample251124-17js4awqar
SHA256 924c015a8f0331ab2173d2db5ae5112924ba97b68b42deb71015e6210196fdb9
MD5 7434fa40fffee9fcaa00d11c48ab2d98
SHA1 90554da1c53e4fb99c1fb37f817b930e615ac54c
SHA512 65ce7e47a81b4c5b7cfce6f44246dc6d90c68c6d534f1e018853609e2618fe7cc95a89d116c98dafb7bcdf724c61bb3d4921553f640c04761dbc687b011805db
SSDEEP 1536:ZmRYlKcwe2HcEryR6uCFIWwdB5qMn9SDbThOw9OwsTZzZj4tZYNT9SR8DMWHRjg8:QaK828ktYnpl0naGwMMge
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
848	RegAsm.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\%AppData%\Microsoft\Windows\Start Menu\Programs\Windows PowerShell\Windows PowerShell.lnk	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4232 set thread context of 848	4232	powershell.exe	84

Command and Scripting Interpreter: JavaScript 1 TTPs
execution

JavaScript
T1059.007
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 1 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	RegAsm.exe

Checks processor information in registry 2 TTPs 7 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Platform Specific Field 1	wermgr.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Update Revision	wermgr.exe
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	wermgr.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	wermgr.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	wermgr.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	wermgr.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	wermgr.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	wermgr.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	wermgr.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
4232	powershell.exe
4232	powershell.exe
4232	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4232	powershell.exe
Token: SeRestorePrivilege	4232	powershell.exe
Token: SeBackupPrivilege	4232	powershell.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2732 wrote to memory of 4232	2732	WScript.exe	82
PID 2732 wrote to memory of 4232	2732	WScript.exe	82
PID 4232 wrote to memory of 848	4232	powershell.exe	84
PID 4232 wrote to memory of 848	4232	powershell.exe	84
PID 4232 wrote to memory of 848	4232	powershell.exe	84
PID 4232 wrote to memory of 848	4232	powershell.exe	84
PID 4232 wrote to memory of 848	4232	powershell.exe	84
PID 4232 wrote to memory of 848	4232	powershell.exe	84
PID 4232 wrote to memory of 848	4232	powershell.exe	84
PID 4232 wrote to memory of 848	4232	powershell.exe	84
PID 4232 wrote to memory of 4748	4232	powershell.exe	85
PID 4232 wrote to memory of 4748	4232	powershell.exe	85

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
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\924c015a8f0331ab2173d2db5ae5112924ba97b68b42deb71015e6210196fdb9.vbs"
1⤵
PID:5520

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\fmoEvHVRpzGVsew.js"
1⤵
- Suspicious use of WriteProcessMemory
PID:2732
- C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4232
- - C:\Users\Admin\AppData\Roaming\RegAsm.exe
    "C:\Users\Admin\AppData\Roaming\RegAsm.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:848
- - C:\Windows\system32\wermgr.exe
    "C:\Windows\system32\wermgr.exe" "-outproc" "0" "4232" "2712" "2680" "2716" "0" "0" "2720" "0" "0" "0" "0" "0"
    3⤵
    - Checks processor information in registry
    - Enumerates system info in registry
    PID:4748

C:\Windows\System32\WScript.exe
C:\Windows\System32\WScript.exe "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\fmoEvHVRpzGVsew.js"
1⤵
PID:4876

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

JavaScript

1

T1059.007

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

3

T1012

System Information Discovery

3

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

__PSScriptPolicyTest_avnobjrn.t0w.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_avnobjrn.t0w.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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fmoEvHVRpzGVsew.js

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\fmoEvHVRpzGVsew.js
Size 2KB
SHA256 e596baec7f619f636cd5d5e3aa3e1e24304ba2aaeb846cd443712dfd808acec3
MD5 a02386bc3e1086b0511e439252b9938a
SHA1 b6b1261702df551e231bd836312da80f328ca2aa
SHA512 3602ffde67ec93e8c1cedf530c8176b177723d42933b85b688e4250af912953abad1f81d0819d249a06180ce64401210c2685826741cc597972f6fb9e82cc02f
MD5 SHA1 SHA512

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RegAsm.exe

Path C:\Users\Admin\AppData\Roaming\RegAsm.exe
Size 52KB
SHA256 f54e019c1896811e1d737c9f15b6b50b43ad6bff3a1dd952662f1b5bdc4069b9
MD5 c295725624e91cea14cb5e5d6faf15f0
SHA1 e563ad27d44f1d20341493f0ec8292827f64ae9c
SHA512 7fc76d9b8397665b044ca2716eedec5495ea90758dc041112d2596f7bd269c938b953a1f85c9c8b23f3fb41e7c2286e09bf4ea9e71bbadb95848f3c05635deb2
SSDEEP 768:8P2Bbv+VazyoD2z9TU//1mz1+M9GnLEu+250eFRJS8s+:fJv46yoD2BTNz1+M9GLfOYw8s+
MD5 SHA1 SHA512 SSDEEP

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memory/4232-9-0x000001FFA2F50000-0x000001FFA2F72000-memory.dmp

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memory/4232-11-0x000001FFBC410000-0x000001FFBC456000-memory.dmp

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memory/4232-13-0x000001FFBC3E0000-0x000001FFBC3E8000-memory.dmp

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memory/4232-14-0x000001FFBC3F0000-0x000001FFBC3FC000-memory.dmp

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memory/4232-27-0x000001FFA3370000-0x000001FFA3E32000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads