formbook | 354e6dcfaea16e4f37c6608a890b23a6a801b976f3dc4d11db6274014045d9a4

General

Target

osc.js
Size

380KB
MD5

ec13e690ff5ea4cae17f1862b9fa8f3e
SHA1

45963548c7604ac4ead234c6605d0a67e9d29cdf
SHA256

354e6dcfaea16e4f37c6608a890b23a6a801b976f3dc4d11db6274014045d9a4
SHA512

9bb1635b17a41293f7f094947466d45553a16d0209bb6155d5d9d3da3ab8ac8a3e0e2d91a54d85c24b893cb78313bb0d2840d210424a82f94add1f9d515925bb

Score

10^/10

formbook vjw0rm xloader r4wf loader persistence rat spyware stealer suricata trojan worm

Malware Config

Extracted

Family

xloader

Version

2.8

Campaign

r4wf

Decoy

eQLhwti8E4CX1m8bp0WK2Q==

axoAyf6nwR9Y43o1nFx+930=

vf9fMlHrgdcI

TRQU8PPgFWegAcLFsjQ5TUX2

CFXUiz7SjsLqcQ==

XKeIL6Nmg+8pokY+wjaooasXRQIt

NLSkgIdanO/4SNPAdlKUrIms7Q==

TTKhgqyuCnCmH7yGa12g8HXrnY/nKGI=

5X0d70pNfaYGRgI=

fXXOk9C1+U9bhkIBIqn8

dN7HmMiv/TtAgyP2tYrEG2Yq4Yw=

HRqUgbJeorn4Zg==

MZ7Sh6xm71vhCNLW

7iFsO188fKYGRgI=

o9VC9kgPVXmCz2gBIqn8

B0y+iMbD+lzhCNLW

ciUeBS0WbdHuVGH+xJU=

Q3334PeyxydNmzoBIqn8

kgHx3RbrgdcI

WQjgo8h9g6YGRgI=

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
Xloader
Xloader is a rebranded version of Formbook malware.
loader xloader
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata

Xloader Payload 6 IoCs

rat

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\greatk.exe	xloader
C:\Users\Admin\AppData\Local\Temp\greatk.exe	xloader
behavioral1/memory/1196-68-0x0000000000080000-0x00000000000AC000-memory.dmp	xloader
behavioral1/memory/1196-71-0x0000000000080000-0x00000000000AC000-memory.dmp	xloader
C:\Program Files (x86)\Mvpmpnf\useropx4.exe	xloader
C:\Program Files (x86)\Mvpmpnf\useropx4.exe	xloader

Blocklisted process makes network request 16 IoCs

Processes:

wscript.exe

flow	pid	process
4	1164	wscript.exe
5	1164	wscript.exe
8	1164	wscript.exe
13	1164	wscript.exe
16	1164	wscript.exe
20	1164	wscript.exe
23	1164	wscript.exe
30	1164	wscript.exe
34	1164	wscript.exe
39	1164	wscript.exe
42	1164	wscript.exe
46	1164	wscript.exe
54	1164	wscript.exe
58	1164	wscript.exe
62	1164	wscript.exe
66	1164	wscript.exe

Executes dropped EXE 2 IoCs

Processes:

greatk.exeuseropx4.exe

pid process

856 greatk.exe
1036 useropx4.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

Processes:

greatk.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Control Panel\International\Geo\Nation greatk.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Control Panel\International\Geo\Nation	greatk.exe

Drops startup file 2 IoCs

Processes:

wscript.exe

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

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

wscript.exesystray.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows\CurrentVersion\Run\YVBPFHTJIQ = "\"C:\\Users\\Admin\\AppData\\Roaming\\mEuDqwvosV.js\""	wscript.exe
Key created	\Registry\Machine\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run	systray.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\LTXD9TK0WF5 = "C:\\Program Files (x86)\\Mvpmpnf\\useropx4.exe"	systray.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

greatk.exesystray.exe

description	pid	process	target process
PID 856 set thread context of 1292	856	greatk.exe	Explorer.EXE
PID 1196 set thread context of 1292	1196	systray.exe	Explorer.EXE

Drops file in Program Files directory 2 IoCs

Processes:

systray.exeExplorer.EXE

description	ioc	process
File opened for modification	C:\Program Files (x86)\Mvpmpnf\useropx4.exe	systray.exe
File created	C:\Program Files (x86)\Mvpmpnf\useropx4.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

Processes:

systray.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-2277218442-1199762539-2004043321-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	systray.exe

Suspicious behavior: EnumeratesProcesses 27 IoCs

Processes:

greatk.exesystray.exeuseropx4.exe

pid	process
856	greatk.exe
856	greatk.exe
1196	systray.exe
1196	systray.exe
1196	systray.exe
1196	systray.exe
1196	systray.exe
1196	systray.exe
1196	systray.exe
1196	systray.exe
1196	systray.exe
1196	systray.exe
1196	systray.exe
1196	systray.exe
1196	systray.exe
1196	systray.exe
1196	systray.exe
1196	systray.exe
1196	systray.exe
1196	systray.exe
1196	systray.exe
1196	systray.exe
1196	systray.exe
1196	systray.exe
1036	useropx4.exe
1196	systray.exe
1196	systray.exe

Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

greatk.exesystray.exe

pid process

856 greatk.exe
856 greatk.exe
856 greatk.exe
1196 systray.exe
1196 systray.exe
1196 systray.exe
1196 systray.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

greatk.exesystray.exeuseropx4.exe

description pid process

Token: SeDebugPrivilege 856 greatk.exe
Token: SeDebugPrivilege 1196 systray.exe
Token: SeDebugPrivilege 1036 useropx4.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1292 Explorer.EXE
1292 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1292 Explorer.EXE
1292 Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	856	greatk.exe
Token: SeDebugPrivilege	1196	systray.exe
Token: SeDebugPrivilege	1036	useropx4.exe

pid	process
1292	Explorer.EXE
1292	Explorer.EXE

pid	process
1292	Explorer.EXE
1292	Explorer.EXE

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

wscript.exeExplorer.EXEsystray.exe

description	pid	process	target process
PID 1972 wrote to memory of 1164	1972	wscript.exe	wscript.exe
PID 1972 wrote to memory of 1164	1972	wscript.exe	wscript.exe
PID 1972 wrote to memory of 1164	1972	wscript.exe	wscript.exe
PID 1972 wrote to memory of 856	1972	wscript.exe	greatk.exe
PID 1972 wrote to memory of 856	1972	wscript.exe	greatk.exe
PID 1972 wrote to memory of 856	1972	wscript.exe	greatk.exe
PID 1972 wrote to memory of 856	1972	wscript.exe	greatk.exe
PID 1292 wrote to memory of 1196	1292	Explorer.EXE	systray.exe
PID 1292 wrote to memory of 1196	1292	Explorer.EXE	systray.exe
PID 1292 wrote to memory of 1196	1292	Explorer.EXE	systray.exe
PID 1292 wrote to memory of 1196	1292	Explorer.EXE	systray.exe
PID 1196 wrote to memory of 1460	1196	systray.exe	cmd.exe
PID 1196 wrote to memory of 1460	1196	systray.exe	cmd.exe
PID 1196 wrote to memory of 1460	1196	systray.exe	cmd.exe
PID 1196 wrote to memory of 1460	1196	systray.exe	cmd.exe
PID 1196 wrote to memory of 308	1196	systray.exe	Firefox.exe
PID 1196 wrote to memory of 308	1196	systray.exe	Firefox.exe
PID 1196 wrote to memory of 308	1196	systray.exe	Firefox.exe
PID 1196 wrote to memory of 308	1196	systray.exe	Firefox.exe
PID 1196 wrote to memory of 308	1196	systray.exe	Firefox.exe
PID 1292 wrote to memory of 1036	1292	Explorer.EXE	useropx4.exe
PID 1292 wrote to memory of 1036	1292	Explorer.EXE	useropx4.exe
PID 1292 wrote to memory of 1036	1292	Explorer.EXE	useropx4.exe
PID 1292 wrote to memory of 1036	1292	Explorer.EXE	useropx4.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Drops file in Program Files directory
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1292
- C:\Windows\system32\wscript.exe
  wscript.exe C:\Users\Admin\AppData\Local\Temp\osc.js
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1972
- - C:\Windows\System32\wscript.exe
    "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\mEuDqwvosV.js"
    3⤵
    - Blocklisted process makes network request
    - Drops startup file
    - Adds Run key to start application
    PID:1164
- - C:\Users\Admin\AppData\Local\Temp\greatk.exe
    "C:\Users\Admin\AppData\Local\Temp\greatk.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:856
- C:\Windows\SysWOW64\systray.exe
  "C:\Windows\SysWOW64\systray.exe"
  2⤵
  - 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:1196
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\greatk.exe"
    3⤵
    PID:1460
- - C:\Program Files\Mozilla Firefox\Firefox.exe
    "C:\Program Files\Mozilla Firefox\Firefox.exe"
    3⤵
    PID:308
- C:\Program Files (x86)\Mvpmpnf\useropx4.exe
  "C:\Program Files (x86)\Mvpmpnf\useropx4.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1036

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Program Files (x86)\Mvpmpnf\useropx4.exe

Filesize
174KB

MD5
4e4fe9a1e4568efac0293fcaf431f2da

SHA1
c17588029ab95904ab548b5c8fb4dc626e1d8d12

SHA256
929b0c7d953ee579a49a6d4a9456a1a45a9f4e81933adf6a07b34d6669f096b6

SHA512
7a323280ef25c208fbe726e5ba21200ec9af976f30da3ea330387afe95c41ad082404d4cd811672f0b7e9764759c8cc7b1b2252da242ff8253e429bb2cc7a461

Download Submit
C:\Program Files (x86)\Mvpmpnf\useropx4.exe

Filesize
174KB

MD5
4e4fe9a1e4568efac0293fcaf431f2da

SHA1
c17588029ab95904ab548b5c8fb4dc626e1d8d12

SHA256
929b0c7d953ee579a49a6d4a9456a1a45a9f4e81933adf6a07b34d6669f096b6

SHA512
7a323280ef25c208fbe726e5ba21200ec9af976f30da3ea330387afe95c41ad082404d4cd811672f0b7e9764759c8cc7b1b2252da242ff8253e429bb2cc7a461

Download Submit
C:\Users\Admin\AppData\Local\Temp\greatk.exe

Filesize
174KB

MD5
4e4fe9a1e4568efac0293fcaf431f2da

SHA1
c17588029ab95904ab548b5c8fb4dc626e1d8d12

SHA256
929b0c7d953ee579a49a6d4a9456a1a45a9f4e81933adf6a07b34d6669f096b6

SHA512
7a323280ef25c208fbe726e5ba21200ec9af976f30da3ea330387afe95c41ad082404d4cd811672f0b7e9764759c8cc7b1b2252da242ff8253e429bb2cc7a461

Download Submit
C:\Users\Admin\AppData\Local\Temp\greatk.exe

Filesize
174KB

MD5
4e4fe9a1e4568efac0293fcaf431f2da

SHA1
c17588029ab95904ab548b5c8fb4dc626e1d8d12

SHA256
929b0c7d953ee579a49a6d4a9456a1a45a9f4e81933adf6a07b34d6669f096b6

SHA512
7a323280ef25c208fbe726e5ba21200ec9af976f30da3ea330387afe95c41ad082404d4cd811672f0b7e9764759c8cc7b1b2252da242ff8253e429bb2cc7a461

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

Filesize
24KB

MD5
23c9799ce08ff500a123e55cccb65dda

SHA1
30bcdb93d1262d9dd3ef022266e95df8818ae537

SHA256
46b695af2a9b7e8d824948ee8019b2f3d3b74666450f47c3f8d172468c256286

SHA512
19beb6f22196c35a3214662845e34a1176a533774c8ac2ecbf122d4be785c77e58766ec72d26d13555edd7ab6e18a087f0d4b68ae821f8fc41111b8987bd8930

Download Submit
memory/856-57-0x0000000000000000-mapping.dmp

Download
memory/856-61-0x0000000000280000-0x0000000000291000-memory.dmp

Filesize
68KB

Download
memory/856-60-0x0000000000850000-0x0000000000B53000-memory.dmp

Filesize
3.0MB

Download
memory/1036-74-0x0000000000000000-mapping.dmp

Download
memory/1036-76-0x00000000007B0000-0x0000000000AB3000-memory.dmp

Filesize
3.0MB

Download
memory/1164-55-0x0000000000000000-mapping.dmp

Download
memory/1196-63-0x0000000000000000-mapping.dmp

Download
memory/1196-67-0x0000000001F50000-0x0000000002253000-memory.dmp

Filesize
3.0MB

Download
memory/1196-68-0x0000000000080000-0x00000000000AC000-memory.dmp

Filesize
176KB

Download
memory/1196-69-0x0000000000940000-0x00000000009D0000-memory.dmp

Filesize
576KB

Download
memory/1196-66-0x0000000000B40000-0x0000000000B45000-memory.dmp

Filesize
20KB

Download
memory/1196-71-0x0000000000080000-0x00000000000AC000-memory.dmp

Filesize
176KB

Download
memory/1196-73-0x0000000076721000-0x0000000076723000-memory.dmp

Filesize
8KB

Download
memory/1292-70-0x00000000049F0000-0x0000000004A91000-memory.dmp

Filesize
644KB

Download
memory/1292-72-0x00000000049F0000-0x0000000004A91000-memory.dmp

Filesize
644KB

Download
memory/1292-62-0x00000000061B0000-0x000000000626B000-memory.dmp

Filesize
748KB

Download
memory/1460-65-0x0000000000000000-mapping.dmp

Download
memory/1972-54-0x000007FEFBF21000-0x000007FEFBF23000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads