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
behavioral2/memory/3824-163-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/3824-167-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/3852-173-0x0000000000D90000-0x0000000000DBF000-memory.dmp	formbook
behavioral2/memory/3852-175-0x0000000000D90000-0x0000000000DBF000-memory.dmp	formbook

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:

0x00070000000130fe-65.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Control Panel\International\Geo\Nation	0x00070000000130fe-65.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

0x00070000000130fe-65.exeMSBuild.exeexplorer.exe

description	pid	process	target process
PID 2700 set thread context of 3824	2700	0x00070000000130fe-65.exe	MSBuild.exe
PID 3824 set thread context of 3200	3824	MSBuild.exe	Explorer.EXE
PID 3852 set thread context of 3200	3852	explorer.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 52 IoCs

Processes:

powershell.exeMSBuild.exeexplorer.exe

pid	process
4444	powershell.exe
4444	powershell.exe
3824	MSBuild.exe
3824	MSBuild.exe
3824	MSBuild.exe
3824	MSBuild.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe
3852	explorer.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

3200 Explorer.EXE
Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

MSBuild.exeexplorer.exe

pid process

3824 MSBuild.exe
3824 MSBuild.exe
3824 MSBuild.exe
3852 explorer.exe
3852 explorer.exe

pid	process
3200	Explorer.EXE

pid	process
3824	MSBuild.exe
3824	MSBuild.exe
3824	MSBuild.exe
3852	explorer.exe
3852	explorer.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

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

description	pid	process
Token: SeDebugPrivilege	2700	0x00070000000130fe-65.exe
Token: SeDebugPrivilege	4444	powershell.exe
Token: SeDebugPrivilege	3824	MSBuild.exe
Token: SeDebugPrivilege	3852	explorer.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

0x00070000000130fe-65.exeExplorer.EXEexplorer.exe

description	pid	process	target process
PID 2700 wrote to memory of 4444	2700	0x00070000000130fe-65.exe	powershell.exe
PID 2700 wrote to memory of 4444	2700	0x00070000000130fe-65.exe	powershell.exe
PID 2700 wrote to memory of 4444	2700	0x00070000000130fe-65.exe	powershell.exe
PID 2700 wrote to memory of 3824	2700	0x00070000000130fe-65.exe	MSBuild.exe
PID 2700 wrote to memory of 3824	2700	0x00070000000130fe-65.exe	MSBuild.exe
PID 2700 wrote to memory of 3824	2700	0x00070000000130fe-65.exe	MSBuild.exe
PID 2700 wrote to memory of 3824	2700	0x00070000000130fe-65.exe	MSBuild.exe
PID 2700 wrote to memory of 3824	2700	0x00070000000130fe-65.exe	MSBuild.exe
PID 2700 wrote to memory of 3824	2700	0x00070000000130fe-65.exe	MSBuild.exe
PID 3200 wrote to memory of 3852	3200	Explorer.EXE	explorer.exe
PID 3200 wrote to memory of 3852	3200	Explorer.EXE	explorer.exe
PID 3200 wrote to memory of 3852	3200	Explorer.EXE	explorer.exe
PID 3852 wrote to memory of 3424	3852	explorer.exe	cmd.exe
PID 3852 wrote to memory of 3424	3852	explorer.exe	cmd.exe
PID 3852 wrote to memory of 3424	3852	explorer.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:3200

C:\Users\Admin\AppData\Local\Temp\0x00070000000130fe-65.exe
"C:\Users\Admin\AppData\Local\Temp\0x00070000000130fe-65.exe"
2⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2700

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:4444

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:3824

C:\Windows\SysWOW64\explorer.exe
"C:\Windows\SysWOW64\explorer.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3852

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
3⤵
PID:3424

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_pbye3bk3.yzo.ps1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2700-134-0x0000000001670000-0x0000000001680000-memory.dmp

Filesize
64KB

Download
memory/2700-135-0x0000000006FB0000-0x0000000006FD2000-memory.dmp

Filesize
136KB

Download
memory/2700-155-0x0000000001670000-0x0000000001680000-memory.dmp

Filesize
64KB

Download
memory/2700-133-0x0000000000CE0000-0x0000000000CFC000-memory.dmp

Filesize
112KB

Download
memory/3200-179-0x0000000009140000-0x00000000092CE000-memory.dmp

Filesize
1.6MB

Download
memory/3200-181-0x0000000009140000-0x00000000092CE000-memory.dmp

Filesize
1.6MB

Download
memory/3200-178-0x0000000009140000-0x00000000092CE000-memory.dmp

Filesize
1.6MB

Download
memory/3200-169-0x00000000034F0000-0x00000000035B4000-memory.dmp

Filesize
784KB

Download
memory/3824-163-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/3824-166-0x0000000001940000-0x0000000001C8A000-memory.dmp

Filesize
3.3MB

Download
memory/3824-168-0x00000000018F0000-0x0000000001904000-memory.dmp

Filesize
80KB

Download
memory/3824-167-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/3852-175-0x0000000000D90000-0x0000000000DBF000-memory.dmp

Filesize
188KB

Download
memory/3852-170-0x00000000008F0000-0x0000000000D23000-memory.dmp

Filesize
4.2MB

Download
memory/3852-172-0x00000000008F0000-0x0000000000D23000-memory.dmp

Filesize
4.2MB

Download
memory/3852-173-0x0000000000D90000-0x0000000000DBF000-memory.dmp

Filesize
188KB

Download
memory/3852-174-0x0000000003000000-0x000000000334A000-memory.dmp

Filesize
3.3MB

Download
memory/3852-177-0x0000000002D30000-0x0000000002DC3000-memory.dmp

Filesize
588KB

Download
memory/4444-149-0x0000000004CB0000-0x0000000004CC0000-memory.dmp

Filesize
64KB

Download
memory/4444-158-0x0000000004CB0000-0x0000000004CC0000-memory.dmp

Filesize
64KB

Download
memory/4444-157-0x0000000004CB0000-0x0000000004CC0000-memory.dmp

Filesize
64KB

Download
memory/4444-156-0x0000000004CB0000-0x0000000004CC0000-memory.dmp

Filesize
64KB

Download
memory/4444-154-0x0000000004CB0000-0x0000000004CC0000-memory.dmp

Filesize
64KB

Download
memory/4444-153-0x0000000006760000-0x000000000677A000-memory.dmp

Filesize
104KB

Download
memory/4444-152-0x00000000078D0000-0x0000000007F4A000-memory.dmp

Filesize
6.5MB

Download
memory/4444-151-0x0000000006280000-0x000000000629E000-memory.dmp

Filesize
120KB

Download
memory/4444-150-0x0000000004CB0000-0x0000000004CC0000-memory.dmp

Filesize
64KB

Download
memory/4444-144-0x0000000005BF0000-0x0000000005C56000-memory.dmp

Filesize
408KB

Download
memory/4444-143-0x0000000005B80000-0x0000000005BE6000-memory.dmp

Filesize
408KB

Download
memory/4444-137-0x0000000005330000-0x0000000005958000-memory.dmp

Filesize
6.2MB

Download
memory/4444-136-0x0000000004CC0000-0x0000000004CF6000-memory.dmp

Filesize
216KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

Loading Replay Monitor...

Downloads