formbook | 50268da94205b374b7b1344a8ae09105e3732dd026350b7418d750a2d4dca7e9

General

Target

vbc.exe
Size

10.0MB
MD5

93a2d330d57689aea5146c1d7b767ff8
SHA1

39b73da296c473b30d8ef5e4063288653500d3ef
SHA256

50268da94205b374b7b1344a8ae09105e3732dd026350b7418d750a2d4dca7e9
SHA512

b2ef5945d2599a98966ff0c58ad9917481ab27b238d6152fff32bd82313196353312ffd61cde07552d1e9bcba8cc7d2b4f47df360c427618f250217ef372fa3b
SSDEEP

96:vKbBpyUc5+YdueYZkhgEMLUEM5i2RZjz+4KpfBu7uxVJGkFpNeFnUu:vyfyUOfuUk52T/pwu7UVJrlru

Score

10^/10

formbook dcn0 rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Campaign

dcn0

Decoy

ZVx68vDtAMBCwg==

oBMBvsNORkM/O/ox

Ff9pISWkm6eG4lByIspp

c2T42c6CIIF6B8xTxm9XzpVw

bvjhxRbnAC183w==

0lTttSNG4HUDNflyIspp

hPXFlstqiHA/O/ox

WLR+MeerxZ0cNn1ja+IQAYo=

IHRn4xXOVKi477zarG+ObSy7YJA=

Xhf3e+tdAC183w==

Xk0ZAezv2rWH

kngo+vBeSRN7AszNwam3Osmguuqc0MoC

a2Qp7a+E8fSw7LDjpnqEKjsRZA==

3zjy4E7+QM48wg==

YcCmqT3OUNAigVott2pBKiy7YJA=

4+SMeX1juat/5cZ1AZihcyy7YJA=

/+m7sro0OBTl3TMpCw==

i2ctEfe4//a64yklMsgS2J90

+loZ2QKGX0UWgpvErMs=

b9BNCnJWQJS8IfsR0uR3bCy7YJA=

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
Blocklisted process makes network request 1 IoCs

Processes:

wscript.exe

flow pid process

173 5068 wscript.exe

flow	pid	process
173	5068	wscript.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

Processes:

vbc.exeRegAsm.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	vbc.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	RegAsm.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Suspicious use of SetThreadContext 3 IoCs

Processes:

vbc.exeRegAsm.exewscript.exe

description	pid	process	target process
PID 4428 set thread context of 2260	4428	vbc.exe	RegAsm.exe
PID 2260 set thread context of 3008	2260	RegAsm.exe	Explorer.EXE
PID 5068 set thread context of 3008	5068	wscript.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:

wscript.exe

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

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

powershell.exepowershell.exeRegAsm.exewscript.exe

pid	process
4636	powershell.exe
4636	powershell.exe
4280	powershell.exe
4280	powershell.exe
2260	RegAsm.exe
2260	RegAsm.exe
2260	RegAsm.exe
2260	RegAsm.exe
2260	RegAsm.exe
2260	RegAsm.exe
2260	RegAsm.exe
2260	RegAsm.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

3008 Explorer.EXE
Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

RegAsm.exewscript.exe

pid process

2260 RegAsm.exe
2260 RegAsm.exe
2260 RegAsm.exe
5068 wscript.exe
5068 wscript.exe
5068 wscript.exe
5068 wscript.exe

pid	process
3008	Explorer.EXE

pid	process
2260	RegAsm.exe
2260	RegAsm.exe
2260	RegAsm.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe
5068	wscript.exe

Suspicious use of AdjustPrivilegeToken 11 IoCs

Processes:

vbc.exepowershell.exepowershell.exeRegAsm.exewscript.exeExplorer.EXE

description	pid	process
Token: SeDebugPrivilege	4428	vbc.exe
Token: SeDebugPrivilege	4636	powershell.exe
Token: SeDebugPrivilege	4280	powershell.exe
Token: SeDebugPrivilege	2260	RegAsm.exe
Token: SeDebugPrivilege	5068	wscript.exe
Token: SeShutdownPrivilege	3008	Explorer.EXE
Token: SeCreatePagefilePrivilege	3008	Explorer.EXE
Token: SeShutdownPrivilege	3008	Explorer.EXE
Token: SeCreatePagefilePrivilege	3008	Explorer.EXE
Token: SeShutdownPrivilege	3008	Explorer.EXE
Token: SeCreatePagefilePrivilege	3008	Explorer.EXE

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

vbc.execmd.exeExplorer.EXEwscript.exe

description	pid	process	target process
PID 4428 wrote to memory of 4636	4428	vbc.exe	powershell.exe
PID 4428 wrote to memory of 4636	4428	vbc.exe	powershell.exe
PID 4428 wrote to memory of 4636	4428	vbc.exe	powershell.exe
PID 4428 wrote to memory of 3784	4428	vbc.exe	cmd.exe
PID 4428 wrote to memory of 3784	4428	vbc.exe	cmd.exe
PID 4428 wrote to memory of 3784	4428	vbc.exe	cmd.exe
PID 3784 wrote to memory of 4280	3784	cmd.exe	powershell.exe
PID 3784 wrote to memory of 4280	3784	cmd.exe	powershell.exe
PID 3784 wrote to memory of 4280	3784	cmd.exe	powershell.exe
PID 4428 wrote to memory of 2260	4428	vbc.exe	RegAsm.exe
PID 4428 wrote to memory of 2260	4428	vbc.exe	RegAsm.exe
PID 4428 wrote to memory of 2260	4428	vbc.exe	RegAsm.exe
PID 4428 wrote to memory of 2260	4428	vbc.exe	RegAsm.exe
PID 4428 wrote to memory of 2260	4428	vbc.exe	RegAsm.exe
PID 4428 wrote to memory of 2260	4428	vbc.exe	RegAsm.exe
PID 3008 wrote to memory of 5068	3008	Explorer.EXE	wscript.exe
PID 3008 wrote to memory of 5068	3008	Explorer.EXE	wscript.exe
PID 3008 wrote to memory of 5068	3008	Explorer.EXE	wscript.exe
PID 5068 wrote to memory of 1352	5068	wscript.exe	Firefox.exe
PID 5068 wrote to memory of 1352	5068	wscript.exe	Firefox.exe
PID 5068 wrote to memory of 1352	5068	wscript.exe	Firefox.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3008

C:\Users\Admin\AppData\Local\Temp\vbc.exe
"C:\Users\Admin\AppData\Local\Temp\vbc.exe"
2⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4428

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAANQAwAA==
3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4636

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c powershell -ENC cwBlAHQALQBtAHAAcAByAGUAZgBlAHIAZQBuAGMAZQAgAC0AZQB4AGMAbAB1AHMAaQBvAG4AcABhAHQAaAAgAEMAOgBcAA==
3⤵
- Suspicious use of WriteProcessMemory
PID:3784

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
powershell -ENC cwBlAHQALQBtAHAAcAByAGUAZgBlAHIAZQBuAGMAZQAgAC0AZQB4AGMAbAB1AHMAaQBvAG4AcABhAHQAaAAgAEMAOgBcAA==
4⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4280

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
3⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:2260

C:\Windows\SysWOW64\wscript.exe
"C:\Windows\SysWOW64\wscript.exe"
2⤵
- Blocklisted process makes network request
- Suspicious use of SetThreadContext
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5068

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:1352

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scripting

1

T1064

Persistence

Privilege Escalation

Defense Evasion

Scripting

1

T1064

Modify Registry

1

T1112

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log
Filesize
1KB

MD5
4280e36a29fa31c01e4d8b2ba726a0d8

SHA1
c485c2c9ce0a99747b18d899b71dfa9a64dabe32

SHA256
e2486a1bdcba80dad6dd6210d7374bd70ae196a523c06ceda71370fd3ea78359

SHA512
494fe5f0ade03669e5830bed93c964d69b86629440148d7b0881cf53203fd89443ebff9b4d1ee9d96244f62af6edede622d9eacba37f80f389a0d522e4ad4ea4

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\ModuleAnalysisCache
Filesize
53KB

MD5
06ad34f9739c5159b4d92d702545bd49

SHA1
9152a0d4f153f3f40f7e606be75f81b582ee0c17

SHA256
474813b625f00710f29fa3b488235a6a22201851efb336bddf60d7d24a66bfba

SHA512
c272cd28ae164d465b779163ba9eca6a28261376414c6bbdfbd9f2128adb7f7ff1420e536b4d6000d0301ded2ec9036bc5c657588458bff41f176bdce8d74f92

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Filesize
16KB

MD5
70748b71fd527338cfdbc657d24712ee

SHA1
3202ae3aa536e18e6b9865fe2c072fd3e89a9727

SHA256
7e252d7fe8e77ae03c4c91f29bdcc35e6a97943feb585d61f7d80ca4a39f2926

SHA512
6a56e75fb23feb5aa91abae28d549e878b6bf12cfbce64a3771cd1c798c619a49b87d7748511685e3560382be0c9b0e568c40c7cc4fe19888f7eb43eac4542d4

Download Submit
memory/2260-158-0x0000000000D40000-0x0000000000D50000-memory.dmp

Filesize
64KB

Download
memory/2260-157-0x0000000000422000-0x0000000000424000-memory.dmp

Filesize
8KB

Download
memory/2260-156-0x00000000028E0000-0x0000000002C2A000-memory.dmp

Filesize
3.3MB

Download
memory/2260-155-0x0000000000401000-0x000000000042E000-memory.dmp

Filesize
180KB

Download
memory/2260-154-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2260-152-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2260-149-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2260-148-0x0000000000000000-mapping.dmp

Download
memory/3008-159-0x0000000007B70000-0x0000000007CA3000-memory.dmp

Filesize
1.2MB

Download
memory/3008-173-0x00000000083B0000-0x00000000084DA000-memory.dmp

Filesize
1.2MB

Download
memory/3008-175-0x00000000083B0000-0x00000000084DA000-memory.dmp

Filesize
1.2MB

Download
memory/3784-145-0x0000000000000000-mapping.dmp

Download
memory/4280-163-0x0000000007CF0000-0x0000000007CFA000-memory.dmp

Filesize
40KB

Download
memory/4280-167-0x0000000007EC0000-0x0000000007EDA000-memory.dmp

Filesize
104KB

Download
memory/4280-168-0x0000000007EA0000-0x0000000007EA8000-memory.dmp

Filesize
32KB

Download
memory/4280-146-0x0000000000000000-mapping.dmp

Download
memory/4280-165-0x00000000067D0000-0x00000000067DE000-memory.dmp

Filesize
56KB

Download
memory/4280-164-0x0000000007F40000-0x0000000007FD6000-memory.dmp

Filesize
600KB

Download
memory/4280-162-0x0000000006F20000-0x0000000006F3E000-memory.dmp

Filesize
120KB

Download
memory/4280-161-0x0000000073370000-0x00000000733BC000-memory.dmp

Filesize
304KB

Download
memory/4280-160-0x0000000006F40000-0x0000000006F72000-memory.dmp

Filesize
200KB

Download
memory/4428-132-0x0000000000D70000-0x0000000000D78000-memory.dmp

Filesize
32KB

Download
memory/4428-136-0x0000000007030000-0x0000000007052000-memory.dmp

Filesize
136KB

Download
memory/4428-135-0x0000000005740000-0x000000000574A000-memory.dmp

Filesize
40KB

Download
memory/4428-133-0x0000000005CC0000-0x0000000006264000-memory.dmp

Filesize
5.6MB

Download
memory/4428-134-0x00000000057B0000-0x0000000005842000-memory.dmp

Filesize
584KB

Download
memory/4636-142-0x0000000006410000-0x000000000642E000-memory.dmp

Filesize
120KB

Download
memory/4636-139-0x00000000055A0000-0x0000000005BC8000-memory.dmp

Filesize
6.2MB

Download
memory/4636-141-0x0000000005DB0000-0x0000000005E16000-memory.dmp

Filesize
408KB

Download
memory/4636-137-0x0000000000000000-mapping.dmp

Download
memory/4636-138-0x0000000004E40000-0x0000000004E76000-memory.dmp

Filesize
216KB

Download
memory/4636-143-0x0000000007A90000-0x000000000810A000-memory.dmp

Filesize
6.5MB

Download
memory/4636-144-0x0000000006900000-0x000000000691A000-memory.dmp

Filesize
104KB

Download
memory/4636-140-0x0000000005D40000-0x0000000005DA6000-memory.dmp

Filesize
408KB

Download
memory/5068-169-0x0000000000730000-0x0000000000757000-memory.dmp

Filesize
156KB

Download
memory/5068-170-0x0000000000F00000-0x0000000000F2D000-memory.dmp

Filesize
180KB

Download
memory/5068-172-0x0000000002D60000-0x0000000002DEF000-memory.dmp

Filesize
572KB

Download
memory/5068-171-0x0000000002EC0000-0x000000000320A000-memory.dmp

Filesize
3.3MB

Download
memory/5068-174-0x0000000000F00000-0x0000000000F2D000-memory.dmp

Filesize
180KB

Download
memory/5068-166-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads