formbook | 642b9c5034924c5b8f5059c884fb661c6f276135b5a373a77335d1c9c5fecfd6

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
19/12/2022, 17:02

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General

Target

8aaf453b110fa7065e947c3ce62adba79a22b32894a5779bc2aa9cfd87d6df1c.js
Size

895KB
MD5

eaa0d0183335da6eaee3680ec0f11209
SHA1

d6506fa84779f2fb61b86a68c948f44f5abbee12
SHA256

8aaf453b110fa7065e947c3ce62adba79a22b32894a5779bc2aa9cfd87d6df1c
SHA512

61af0c623e36894abbfc6ed557c3a51d851c82273dbefeb186ee677b6eb5a800206500c27abbdaeea047119cf009e7c368c041bac4e98e06b51da09820c0f113
SSDEEP

12288:vxykgiEyf9c7MWYdDBYSv+FBkUQExkZ1DF+yNgeW/lWtFB4a:jEMc7MWiAu/J8Wma

Score

10^/10

formbook vjw0rm ermr persistence rat spyware stealer trojan worm

Malware Config

Extracted

Family

formbook

Campaign

ermr

Decoy

ErOK6LFCgNIAlQmH54oaYOL/CN29Z78=

qNSdDhu/PT/1fgafDagiCSZH1SY=

wLpPOAkYS8EABl3pHGc4hNT/Q1sHBrU=

jSxRvptHkeTGl7PT0SEmaZmjqzanuA==

b91oL+2wCcpyhnd6yvF6Pg==

mr81yp1/qqZX

hy7Xsz/PU/LWHMcGL4UYJx9n3A==

KlwrHt1gouPaXaWhoQ==

ng8M320IRJL9Ptw=

8GQbOXuaWxvKnNM=

XndOL7E5sNpVUNty4d/a

rryPBBC8PybYb+2h2MF3FHGL

kEoeyERSVCYO0g==

5/P+SBDby5hO

1fYXc30/h9W7iO17

34X+YKR+wRFE

8ir/X2MlVByh5lQ1ow8=

u9ikm2UMZ7J7hpCYow==

FLI+c3clp1BNDjVAfvC2Dnw=

t21Erq8/r09wAzAJTAH3Ng==

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
Vjw0rm
Vjw0rm is a remote access trojan written in JavaScript.
trojan worm vjw0rm

Blocklisted process makes network request 6 IoCs

flow	pid	Process
5	4768	wscript.exe
77	4768	wscript.exe
97	4768	wscript.exe
111	4768	wscript.exe
118	4768	wscript.exe
135	4768	wscript.exe

Executes dropped EXE 2 IoCs

pid	Process
4740	bin (1).exe
2396	kpxulrtil.exe

Checks computer location settings 2 TTPs 2 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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	wscript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	bin (1).exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\yTZPnpkRug.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\yTZPnpkRug.js	wscript.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\Registry\Machine\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	wlanext.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\KN9L_RUP3N = "C:\\Program Files (x86)\\Eoluxv4\\kpxulrtil.exe"	wlanext.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 4740 set thread context of 3008	4740	bin (1).exe	54
PID 4740 set thread context of 3008	4740	bin (1).exe	54
PID 236 set thread context of 3008	236	wlanext.exe	54

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Eoluxv4\kpxulrtil.exe	wlanext.exe
File opened for modification	C:\Program Files (x86)\Eoluxv4	Explorer.EXE
File created	C:\Program Files (x86)\Eoluxv4\kpxulrtil.exe	Explorer.EXE
File opened for modification	C:\Program Files (x86)\Eoluxv4\kpxulrtil.exe	Explorer.EXE

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

System Information Discovery
T1082

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\Registry\User\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	wlanext.exe

Suspicious behavior: EnumeratesProcesses 62 IoCs

pid	Process
4740	bin (1).exe
4740	bin (1).exe
4740	bin (1).exe
4740	bin (1).exe
4740	bin (1).exe
4740	bin (1).exe
4740	bin (1).exe
4740	bin (1).exe
4740	bin (1).exe
4740	bin (1).exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
2396	kpxulrtil.exe
2396	kpxulrtil.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3008	Explorer.EXE

Suspicious behavior: MapViewOfSection 8 IoCs

pid	Process
4740	bin (1).exe
4740	bin (1).exe
4740	bin (1).exe
4740	bin (1).exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe
236	wlanext.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4740	bin (1).exe
Token: SeDebugPrivilege	236	wlanext.exe
Token: SeDebugPrivilege	2396	kpxulrtil.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 5044 wrote to memory of 4768	5044	wscript.exe	80
PID 5044 wrote to memory of 4768	5044	wscript.exe	80
PID 5044 wrote to memory of 4740	5044	wscript.exe	81
PID 5044 wrote to memory of 4740	5044	wscript.exe	81
PID 5044 wrote to memory of 4740	5044	wscript.exe	81
PID 4740 wrote to memory of 236	4740	bin (1).exe	85
PID 4740 wrote to memory of 236	4740	bin (1).exe	85
PID 4740 wrote to memory of 236	4740	bin (1).exe	85
PID 236 wrote to memory of 1584	236	wlanext.exe	86
PID 236 wrote to memory of 1584	236	wlanext.exe	86
PID 236 wrote to memory of 1584	236	wlanext.exe	86
PID 236 wrote to memory of 1524	236	wlanext.exe	92
PID 236 wrote to memory of 1524	236	wlanext.exe	92
PID 236 wrote to memory of 1524	236	wlanext.exe	92
PID 3008 wrote to memory of 2396	3008	Explorer.EXE	93
PID 3008 wrote to memory of 2396	3008	Explorer.EXE	93
PID 3008 wrote to memory of 2396	3008	Explorer.EXE	93

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Drops file in Program Files directory
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:3008
- C:\Windows\system32\wscript.exe
  wscript.exe C:\Users\Admin\AppData\Local\Temp\8aaf453b110fa7065e947c3ce62adba79a22b32894a5779bc2aa9cfd87d6df1c.js
  2⤵
  - Checks computer location settings
  - Suspicious use of WriteProcessMemory
  PID:5044
- - C:\Windows\System32\wscript.exe
    "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\yTZPnpkRug.js"
    3⤵
    - Blocklisted process makes network request
    - Drops startup file
    PID:4768
- - C:\Users\Admin\AppData\Roaming\bin (1).exe
    "C:\Users\Admin\AppData\Roaming\bin (1).exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:4740
  - - C:\Windows\SysWOW64\wlanext.exe
      "C:\Windows\SysWOW64\wlanext.exe"
      4⤵
      Adds Run key to start application
      Suspicious use of SetThreadContext
      Drops file in Program Files directory
      Modifies Internet Explorer settings
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:236
    - - C:\Windows\SysWOW64\cmd.exe
        
        /c del "C:\Users\Admin\AppData\Roaming\bin (1).exe"
        5⤵
        
        PID:1584
    - - C:\Program Files\Mozilla Firefox\Firefox.exe
        
        "C:\Program Files\Mozilla Firefox\Firefox.exe"
        5⤵
        
        PID:1524
- C:\Program Files (x86)\Eoluxv4\kpxulrtil.exe
  "C:\Program Files (x86)\Eoluxv4\kpxulrtil.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2396

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

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:\Program Files (x86)\Eoluxv4\kpxulrtil.exe

Filesize
177KB

MD5
847f96edff4362a11a17a55a0f777394

SHA1
213b8bd653acaf9749af503b936fde0d9effdff4

SHA256
b7f9d8c856f2a427668235d49710a8ac3caa7bcaf5e317a064205127df431061

SHA512
6aed480e2aca2414e47d44e87ddce59da4809de9629c5fbc9c3e3bd1665a173efec1f13a3275d95ffcc63394b854caf9d2cd7e80af2868a08d0f8885b5470227

Download Submit
C:\Program Files (x86)\Eoluxv4\kpxulrtil.exe

Filesize
177KB

MD5
847f96edff4362a11a17a55a0f777394

SHA1
213b8bd653acaf9749af503b936fde0d9effdff4

SHA256
b7f9d8c856f2a427668235d49710a8ac3caa7bcaf5e317a064205127df431061

SHA512
6aed480e2aca2414e47d44e87ddce59da4809de9629c5fbc9c3e3bd1665a173efec1f13a3275d95ffcc63394b854caf9d2cd7e80af2868a08d0f8885b5470227

Download Submit
C:\Users\Admin\AppData\Roaming\bin (1).exe

Filesize
177KB

MD5
847f96edff4362a11a17a55a0f777394

SHA1
213b8bd653acaf9749af503b936fde0d9effdff4

SHA256
b7f9d8c856f2a427668235d49710a8ac3caa7bcaf5e317a064205127df431061

SHA512
6aed480e2aca2414e47d44e87ddce59da4809de9629c5fbc9c3e3bd1665a173efec1f13a3275d95ffcc63394b854caf9d2cd7e80af2868a08d0f8885b5470227

Download Submit
C:\Users\Admin\AppData\Roaming\bin (1).exe

Filesize
177KB

MD5
847f96edff4362a11a17a55a0f777394

SHA1
213b8bd653acaf9749af503b936fde0d9effdff4

SHA256
b7f9d8c856f2a427668235d49710a8ac3caa7bcaf5e317a064205127df431061

SHA512
6aed480e2aca2414e47d44e87ddce59da4809de9629c5fbc9c3e3bd1665a173efec1f13a3275d95ffcc63394b854caf9d2cd7e80af2868a08d0f8885b5470227

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

Filesize
209KB

MD5
064f1a08c036eb1139a3b01dc9e7344d

SHA1
44f0ce52b38f668f281bd1fccda99ab30dd8f64e

SHA256
76322e9fbff15a55646f3c46d18f82d767200458af540c5cf5b9bad70e073601

SHA512
0da621f99e7d5eea18aaeb08248c431855151a1092678608662efe3289653436b3491d1f67159125a8ffaa9cad904a91e8962d6e00099ca5fe116b8ea08ba788

Download Submit
memory/236-147-0x0000000001380000-0x0000000001410000-memory.dmp

Filesize
576KB

Download
memory/236-146-0x0000000001660000-0x00000000019AA000-memory.dmp

Filesize
3.3MB

Download
memory/236-149-0x0000000000E10000-0x0000000000E3D000-memory.dmp

Filesize
180KB

Download
memory/236-144-0x0000000000E10000-0x0000000000E3D000-memory.dmp

Filesize
180KB

Download
memory/236-143-0x0000000001000000-0x0000000001017000-memory.dmp

Filesize
92KB

Download
memory/2396-154-0x00000000013C0000-0x000000000170A000-memory.dmp

Filesize
3.3MB

Download
memory/3008-141-0x0000000007B70000-0x0000000007CE2000-memory.dmp

Filesize
1.4MB

Download
memory/3008-148-0x00000000079C0000-0x0000000007A6E000-memory.dmp

Filesize
696KB

Download
memory/3008-139-0x0000000002730000-0x00000000027FC000-memory.dmp

Filesize
816KB

Download
memory/3008-150-0x00000000079C0000-0x0000000007A6E000-memory.dmp

Filesize
696KB

Download
memory/4740-140-0x0000000001100000-0x0000000001111000-memory.dmp

Filesize
68KB

Download
memory/4740-137-0x0000000001150000-0x000000000149A000-memory.dmp

Filesize
3.3MB

Download
memory/4740-138-0x0000000000BB0000-0x0000000000BC1000-memory.dmp

Filesize
68KB

Download