formbook | 530e856fb2f5665cc8862cf1db3ec2e6cfa8493c1497cf42e1e12121d147eadc

General

Target

c03dca4.exe
Size

445KB
MD5

7d88844c0ef5b442116161e9bc245ccf
SHA1

3a30a642d7ea1c0f5144cd5c416c7ea3c251e2e8
SHA256

530e856fb2f5665cc8862cf1db3ec2e6cfa8493c1497cf42e1e12121d147eadc
SHA512

b489268f1a60371460042730b51e94c4c44c8b4a304b10b7cb229ab043cfff16e09a71d0da5e899229f2bcea7423a5db5990d0dbad39d7a5d382d768fbb791eb
SSDEEP

12288:0CrXgPjJwADIOyBnKDUEo14cDnfmCyY4It1:Z7k9wAkAUEo1XnfSI

Score

10^/10

formbook t5ez rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Campaign

t5ez

Decoy

v+YaDdg/udazyV4Iyw==

MXDNPIhw1/8BP0Ud2fguBRZ/8nF6wQ==

WsTRjsGfK1Wt+wjFRn9mBQ==

TrAv42rPyfBfhpI=

2FrznhJCG6bpCgm9+n/Xq0cr

phy0dqeRgaeZzcuciHGgrkeVQw==

DIYHd2O24QEB

wVbxr0eqbQZMc4xwQF1W3NdmR2Xc

ncsN3VitpSp18jvXswKeJeQKA1DW

n/FT0RVVULr7fMV0Ykb8ztU=

OET6wvfsbaGp6O2/Rn9mBQ==

2Rb8gNoGR5GEwAeUhcs=

wR8Fc7imd8/3cQeUhcs=

rMZ/VOtX0kR/yV4Iyw==

9YIUqO7RR4iL5Cffi994

03AHmeAX+2F85Cnfi994

9QbOseAK0/c4SGJW

S1EDywDiYofETA==

ivZm1wDWR2hgAEFURn9mBQ==

D2pe4DygKUJKoLidIuwJo4PiKGhyZLPc

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
Blocklisted process makes network request 2 IoCs

Processes:

cmstp.exe

flow pid process

8 1488 cmstp.exe
9 1488 cmstp.exe
Loads dropped DLL 1 IoCs

Processes:

cmstp.exe

pid process

1488 cmstp.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

flow	pid	process
8	1488	cmstp.exe
9	1488	cmstp.exe

pid	process
1488	cmstp.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

c03dca4.exeCasPol.execmstp.exe

description	pid	process	target process
PID 2012 set thread context of 1736	2012	c03dca4.exe	CasPol.exe
PID 1736 set thread context of 1208	1736	CasPol.exe	Explorer.EXE
PID 1488 set thread context of 1208	1488	cmstp.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:

cmstp.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-3845472200-3839195424-595303356-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	cmstp.exe

Suspicious behavior: EnumeratesProcesses 22 IoCs

Processes:

CasPol.execmstp.exe

pid	process
1736	CasPol.exe
1736	CasPol.exe
1736	CasPol.exe
1736	CasPol.exe
1488	cmstp.exe
1488	cmstp.exe
1488	cmstp.exe
1488	cmstp.exe
1488	cmstp.exe
1488	cmstp.exe
1488	cmstp.exe
1488	cmstp.exe
1488	cmstp.exe
1488	cmstp.exe
1488	cmstp.exe
1488	cmstp.exe
1488	cmstp.exe
1488	cmstp.exe
1488	cmstp.exe
1488	cmstp.exe
1488	cmstp.exe
1488	cmstp.exe

Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

CasPol.execmstp.exe

pid process

1736 CasPol.exe
1736 CasPol.exe
1736 CasPol.exe
1488 cmstp.exe
1488 cmstp.exe
1488 cmstp.exe
1488 cmstp.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

CasPol.execmstp.exe

description pid process

Token: SeDebugPrivilege 1736 CasPol.exe
Token: SeDebugPrivilege 1488 cmstp.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1208 Explorer.EXE
1208 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1208 Explorer.EXE
1208 Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	1736	CasPol.exe
Token: SeDebugPrivilege	1488	cmstp.exe

pid	process
1208	Explorer.EXE
1208	Explorer.EXE

pid	process
1208	Explorer.EXE
1208	Explorer.EXE

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

c03dca4.exeExplorer.EXEcmstp.exe

description	pid	process	target process
PID 2012 wrote to memory of 1736	2012	c03dca4.exe	CasPol.exe
PID 2012 wrote to memory of 1736	2012	c03dca4.exe	CasPol.exe
PID 2012 wrote to memory of 1736	2012	c03dca4.exe	CasPol.exe
PID 2012 wrote to memory of 1736	2012	c03dca4.exe	CasPol.exe
PID 2012 wrote to memory of 1736	2012	c03dca4.exe	CasPol.exe
PID 2012 wrote to memory of 1736	2012	c03dca4.exe	CasPol.exe
PID 2012 wrote to memory of 1736	2012	c03dca4.exe	CasPol.exe
PID 1208 wrote to memory of 1488	1208	Explorer.EXE	cmstp.exe
PID 1208 wrote to memory of 1488	1208	Explorer.EXE	cmstp.exe
PID 1208 wrote to memory of 1488	1208	Explorer.EXE	cmstp.exe
PID 1208 wrote to memory of 1488	1208	Explorer.EXE	cmstp.exe
PID 1208 wrote to memory of 1488	1208	Explorer.EXE	cmstp.exe
PID 1208 wrote to memory of 1488	1208	Explorer.EXE	cmstp.exe
PID 1208 wrote to memory of 1488	1208	Explorer.EXE	cmstp.exe
PID 1488 wrote to memory of 1236	1488	cmstp.exe	Firefox.exe
PID 1488 wrote to memory of 1236	1488	cmstp.exe	Firefox.exe
PID 1488 wrote to memory of 1236	1488	cmstp.exe	Firefox.exe
PID 1488 wrote to memory of 1236	1488	cmstp.exe	Firefox.exe
PID 1488 wrote to memory of 1236	1488	cmstp.exe	Firefox.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1208

C:\Users\Admin\AppData\Local\Temp\c03dca4.exe
"C:\Users\Admin\AppData\Local\Temp\c03dca4.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2012

C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1736

C:\Windows\SysWOW64\cmstp.exe
"C:\Windows\SysWOW64\cmstp.exe"
2⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1488

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:1236

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials in Files

1

T1081

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

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Downloads

\Users\Admin\AppData\Local\Temp\sqlite3.dll
Filesize
949KB

MD5
38a3e021eb32c9976adaf0b3372080fc

SHA1
68e02803c646be21007d90bec841c176b82211fd

SHA256
8cde0275d60da0d11954f73c7c8862cfc4b306f61bb8b1ce14abe4a193af2652

SHA512
b886cc112f2750e7300b66f7242850659fa49fdc97f75aed376cb9f5440875f303a143bf8b51068ec42674f1ebe1dfcc40534f3a7aed3cc4d20f9274b9a66d18

Download Submit
memory/1208-64-0x00000000049D0000-0x0000000004B13000-memory.dmp

Filesize
1.3MB

Download
memory/1208-75-0x0000000006690000-0x00000000067AA000-memory.dmp

Filesize
1.1MB

Download
memory/1208-73-0x0000000006690000-0x00000000067AA000-memory.dmp

Filesize
1.1MB

Download
memory/1488-71-0x00000000022B0000-0x00000000025B3000-memory.dmp

Filesize
3.0MB

Download
memory/1488-72-0x0000000000450000-0x00000000004DF000-memory.dmp

Filesize
572KB

Download
memory/1488-74-0x0000000000090000-0x00000000000BD000-memory.dmp

Filesize
180KB

Download
memory/1488-70-0x0000000000090000-0x00000000000BD000-memory.dmp

Filesize
180KB

Download
memory/1488-69-0x0000000000E90000-0x0000000000EA8000-memory.dmp

Filesize
96KB

Download
memory/1488-68-0x0000000075281000-0x0000000075283000-memory.dmp

Filesize
8KB

Download
memory/1488-65-0x0000000000000000-mapping.dmp

Download
memory/1736-67-0x0000000000401000-0x000000000042F000-memory.dmp

Filesize
184KB

Download
memory/1736-66-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1736-59-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1736-63-0x0000000000160000-0x0000000000170000-memory.dmp

Filesize
64KB

Download
memory/1736-57-0x00000000004012B0-mapping.dmp

Download
memory/1736-60-0x0000000000401000-0x000000000042F000-memory.dmp

Filesize
184KB

Download
memory/1736-62-0x0000000000A00000-0x0000000000D03000-memory.dmp

Filesize
3.0MB

Download
memory/1736-56-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2012-54-0x0000000000FA0000-0x0000000001014000-memory.dmp

Filesize
464KB

Download
memory/2012-55-0x0000000000980000-0x00000000009F2000-memory.dmp

Filesize
456KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads