formbook | dfb9a75bd82bcf0d9f72647affdf954d936d629eb3be78fe4b5c9b5166ccb9d6

General

Target

0x00070000000130fe-65.exe
Size

88KB
MD5

eebdd5b69b2fbe296a4e848b6ece83e7
SHA1

a416b80860c5810aa92c72382eb34c29a36ad34a
SHA256

dfb9a75bd82bcf0d9f72647affdf954d936d629eb3be78fe4b5c9b5166ccb9d6
SHA512

b3d4a1cde995d12e16367fd0437a0fcd2bf52081aba40eace547e79838d17de40bb5162112132d3d1c49f7baf9a4c1581a8c4f696df64b4321c6f7cd27245afa
SSDEEP

1536:LgBV6YZ3juIBFXJpk+CfZxtLOgiC2fjYYYYYYfpQpQpQpPd49N7H:UBV6KTBBFXJpk+CfZHLO1zfzpQpQpQp+

Score

10^/10

formbook purecrypter ar73 downloader loader rat spyware stealer trojan

Malware Config

Extracted

Family

purecrypter

C2

http://192.3.215.60/uo7/Cbqta.png

Extracted

Family

formbook

Version

4.1

Campaign

ar73

Decoy

classgorilla.com

b6817.com

1wwuwa.top

dgslimited.africa

deepwaterships.com

hkshshoptw.shop

hurricanevalleyatvjamboree.com

ckpconsulting.com

laojiangmath.com

authenticityhacking.com

family-doctor-53205.com

investinstgeorgeut.com

lithoearthsolution.africa

quickhealcareltd.co.uk

delightkgrillw.top

freezeclosettoilet.com

coo1star.com

gemgamut.com

enrichednetworksolutions.com

betterbeeclean.com

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
PureCrypter
PureCrypter is a .NET malware loader first seen in early 2021.
loader downloader purecrypter

Formbook payload 4 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1628-64-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/1628-68-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/1020-73-0x00000000000C0000-0x00000000000EF000-memory.dmp	formbook
behavioral1/memory/1020-75-0x00000000000C0000-0x00000000000EF000-memory.dmp	formbook

Suspicious use of SetThreadContext 3 IoCs

Processes:

0x00070000000130fe-65.exeMSBuild.execmmon32.exe

description	pid	process	target process
PID 848 set thread context of 1628	848	0x00070000000130fe-65.exe	MSBuild.exe
PID 1628 set thread context of 1324	1628	MSBuild.exe	Explorer.EXE
PID 1020 set thread context of 1324	1020	cmmon32.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

Suspicious behavior: EnumeratesProcesses 23 IoCs

Processes:

powershell.exeMSBuild.execmmon32.exe

pid	process
1140	powershell.exe
1628	MSBuild.exe
1628	MSBuild.exe
1020	cmmon32.exe
1020	cmmon32.exe
1020	cmmon32.exe
1020	cmmon32.exe
1020	cmmon32.exe
1020	cmmon32.exe
1020	cmmon32.exe
1020	cmmon32.exe
1020	cmmon32.exe
1020	cmmon32.exe
1020	cmmon32.exe
1020	cmmon32.exe
1020	cmmon32.exe
1020	cmmon32.exe
1020	cmmon32.exe
1020	cmmon32.exe
1020	cmmon32.exe
1020	cmmon32.exe
1020	cmmon32.exe
1020	cmmon32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

1324 Explorer.EXE
Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

MSBuild.execmmon32.exe

pid process

1628 MSBuild.exe
1628 MSBuild.exe
1628 MSBuild.exe
1020 cmmon32.exe
1020 cmmon32.exe

pid	process
1324	Explorer.EXE

pid	process
1628	MSBuild.exe
1628	MSBuild.exe
1628	MSBuild.exe
1020	cmmon32.exe
1020	cmmon32.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

0x00070000000130fe-65.exepowershell.exeMSBuild.execmmon32.exe

description	pid	process
Token: SeDebugPrivilege	848	0x00070000000130fe-65.exe
Token: SeDebugPrivilege	1140	powershell.exe
Token: SeDebugPrivilege	1628	MSBuild.exe
Token: SeDebugPrivilege	1020	cmmon32.exe

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

0x00070000000130fe-65.exeExplorer.EXEcmmon32.exe

description	pid	process	target process
PID 848 wrote to memory of 1140	848	0x00070000000130fe-65.exe	powershell.exe
PID 848 wrote to memory of 1140	848	0x00070000000130fe-65.exe	powershell.exe
PID 848 wrote to memory of 1140	848	0x00070000000130fe-65.exe	powershell.exe
PID 848 wrote to memory of 1140	848	0x00070000000130fe-65.exe	powershell.exe
PID 848 wrote to memory of 1628	848	0x00070000000130fe-65.exe	MSBuild.exe
PID 848 wrote to memory of 1628	848	0x00070000000130fe-65.exe	MSBuild.exe
PID 848 wrote to memory of 1628	848	0x00070000000130fe-65.exe	MSBuild.exe
PID 848 wrote to memory of 1628	848	0x00070000000130fe-65.exe	MSBuild.exe
PID 848 wrote to memory of 1628	848	0x00070000000130fe-65.exe	MSBuild.exe
PID 848 wrote to memory of 1628	848	0x00070000000130fe-65.exe	MSBuild.exe
PID 848 wrote to memory of 1628	848	0x00070000000130fe-65.exe	MSBuild.exe
PID 1324 wrote to memory of 1020	1324	Explorer.EXE	cmmon32.exe
PID 1324 wrote to memory of 1020	1324	Explorer.EXE	cmmon32.exe
PID 1324 wrote to memory of 1020	1324	Explorer.EXE	cmmon32.exe
PID 1324 wrote to memory of 1020	1324	Explorer.EXE	cmmon32.exe
PID 1020 wrote to memory of 1368	1020	cmmon32.exe	cmd.exe
PID 1020 wrote to memory of 1368	1020	cmmon32.exe	cmd.exe
PID 1020 wrote to memory of 1368	1020	cmmon32.exe	cmd.exe
PID 1020 wrote to memory of 1368	1020	cmmon32.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:1324

C:\Users\Admin\AppData\Local\Temp\0x00070000000130fe-65.exe
"C:\Users\Admin\AppData\Local\Temp\0x00070000000130fe-65.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:848

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1140

C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1628

C:\Windows\SysWOW64\cmmon32.exe
"C:\Windows\SysWOW64\cmmon32.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1020

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
3⤵
PID:1368

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/848-54-0x0000000001370000-0x000000000138C000-memory.dmp

Filesize
112KB

Download
memory/848-55-0x00000000005B0000-0x00000000005F0000-memory.dmp

Filesize
256KB

Download
memory/848-56-0x00000000064B0000-0x0000000006632000-memory.dmp

Filesize
1.5MB

Download
memory/848-57-0x0000000005580000-0x0000000005612000-memory.dmp

Filesize
584KB

Download
memory/1020-75-0x00000000000C0000-0x00000000000EF000-memory.dmp

Filesize
188KB

Download
memory/1020-77-0x0000000000630000-0x00000000006C3000-memory.dmp

Filesize
588KB

Download
memory/1020-73-0x00000000000C0000-0x00000000000EF000-memory.dmp

Filesize
188KB

Download
memory/1020-74-0x0000000001F40000-0x0000000002243000-memory.dmp

Filesize
3.0MB

Download
memory/1020-71-0x00000000006D0000-0x00000000006DD000-memory.dmp

Filesize
52KB

Download
memory/1020-72-0x00000000006D0000-0x00000000006DD000-memory.dmp

Filesize
52KB

Download
memory/1324-81-0x0000000006620000-0x00000000066D7000-memory.dmp

Filesize
732KB

Download
memory/1324-79-0x0000000006620000-0x00000000066D7000-memory.dmp

Filesize
732KB

Download
memory/1324-78-0x0000000006620000-0x00000000066D7000-memory.dmp

Filesize
732KB

Download
memory/1324-70-0x0000000006CA0000-0x0000000006E0C000-memory.dmp

Filesize
1.4MB

Download
memory/1628-62-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1628-69-0x00000000001D0000-0x00000000001E4000-memory.dmp

Filesize
80KB

Download
memory/1628-68-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1628-67-0x00000000009C0000-0x0000000000CC3000-memory.dmp

Filesize
3.0MB

Download
memory/1628-64-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1628-63-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/1628-61-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads