formbook | dfb9a75bd82bcf0d9f72647affdf954d936d629eb3be78fe4b5c9b5166ccb9d6

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
30-03-2023 09:26

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General

Target

tmp.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

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/3344-163-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/3344-169-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/4220-172-0x00000000006C0000-0x00000000006EF000-memory.dmp	formbook
behavioral2/memory/4220-174-0x00000000006C0000-0x00000000006EF000-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:

tmp.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\Control Panel\International\Geo\Nation tmp.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\Control Panel\International\Geo\Nation	tmp.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

tmp.exeMSBuild.exesystray.exe

description	pid	process	target process
PID 4928 set thread context of 3344	4928	tmp.exe	MSBuild.exe
PID 3344 set thread context of 3180	3344	MSBuild.exe	Explorer.EXE
PID 4220 set thread context of 3180	4220	systray.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.exesystray.exe

pid	process
1592	powershell.exe
1592	powershell.exe
3344	MSBuild.exe
3344	MSBuild.exe
3344	MSBuild.exe
3344	MSBuild.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe
4220	systray.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

3180 Explorer.EXE
Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

MSBuild.exesystray.exe

pid process

3344 MSBuild.exe
3344 MSBuild.exe
3344 MSBuild.exe
4220 systray.exe
4220 systray.exe

pid	process
3180	Explorer.EXE

pid	process
3344	MSBuild.exe
3344	MSBuild.exe
3344	MSBuild.exe
4220	systray.exe
4220	systray.exe

Suspicious use of AdjustPrivilegeToken 12 IoCs

Processes:

tmp.exepowershell.exeMSBuild.exesystray.exeExplorer.EXE

description	pid	process
Token: SeDebugPrivilege	4928	tmp.exe
Token: SeDebugPrivilege	1592	powershell.exe
Token: SeDebugPrivilege	3344	MSBuild.exe
Token: SeDebugPrivilege	4220	systray.exe
Token: SeShutdownPrivilege	3180	Explorer.EXE
Token: SeCreatePagefilePrivilege	3180	Explorer.EXE
Token: SeShutdownPrivilege	3180	Explorer.EXE
Token: SeCreatePagefilePrivilege	3180	Explorer.EXE
Token: SeShutdownPrivilege	3180	Explorer.EXE
Token: SeCreatePagefilePrivilege	3180	Explorer.EXE
Token: SeShutdownPrivilege	3180	Explorer.EXE
Token: SeCreatePagefilePrivilege	3180	Explorer.EXE

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

tmp.exeExplorer.EXEsystray.exe

description	pid	process	target process
PID 4928 wrote to memory of 1592	4928	tmp.exe	powershell.exe
PID 4928 wrote to memory of 1592	4928	tmp.exe	powershell.exe
PID 4928 wrote to memory of 1592	4928	tmp.exe	powershell.exe
PID 4928 wrote to memory of 3344	4928	tmp.exe	MSBuild.exe
PID 4928 wrote to memory of 3344	4928	tmp.exe	MSBuild.exe
PID 4928 wrote to memory of 3344	4928	tmp.exe	MSBuild.exe
PID 4928 wrote to memory of 3344	4928	tmp.exe	MSBuild.exe
PID 4928 wrote to memory of 3344	4928	tmp.exe	MSBuild.exe
PID 4928 wrote to memory of 3344	4928	tmp.exe	MSBuild.exe
PID 3180 wrote to memory of 4220	3180	Explorer.EXE	systray.exe
PID 3180 wrote to memory of 4220	3180	Explorer.EXE	systray.exe
PID 3180 wrote to memory of 4220	3180	Explorer.EXE	systray.exe
PID 4220 wrote to memory of 1936	4220	systray.exe	cmd.exe
PID 4220 wrote to memory of 1936	4220	systray.exe	cmd.exe
PID 4220 wrote to memory of 1936	4220	systray.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3180

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
2⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4928

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:1592

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:3344

C:\Windows\SysWOW64\systray.exe
"C:\Windows\SysWOW64\systray.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4220

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
3⤵
PID:1936

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_tvqnikip.p4v.ps1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1592-139-0x0000000001500000-0x0000000001510000-memory.dmp

Filesize
64KB

Download
memory/1592-157-0x0000000001500000-0x0000000001510000-memory.dmp

Filesize
64KB

Download
memory/1592-136-0x0000000001550000-0x0000000001586000-memory.dmp

Filesize
216KB

Download
memory/1592-137-0x0000000005590000-0x0000000005BB8000-memory.dmp

Filesize
6.2MB

Download
memory/1592-138-0x0000000001500000-0x0000000001510000-memory.dmp

Filesize
64KB

Download
memory/1592-156-0x0000000001500000-0x0000000001510000-memory.dmp

Filesize
64KB

Download
memory/1592-140-0x0000000005D90000-0x0000000005DF6000-memory.dmp

Filesize
408KB

Download
memory/1592-158-0x0000000001500000-0x0000000001510000-memory.dmp

Filesize
64KB

Download
memory/1592-141-0x0000000005E00000-0x0000000005E66000-memory.dmp

Filesize
408KB

Download
memory/1592-151-0x0000000006470000-0x000000000648E000-memory.dmp

Filesize
120KB

Download
memory/1592-152-0x0000000001500000-0x0000000001510000-memory.dmp

Filesize
64KB

Download
memory/1592-153-0x0000000007AB0000-0x000000000812A000-memory.dmp

Filesize
6.5MB

Download
memory/1592-154-0x0000000006960000-0x000000000697A000-memory.dmp

Filesize
104KB

Download
memory/3180-202-0x0000000002CD0000-0x0000000002CE0000-memory.dmp

Filesize
64KB

Download
memory/3180-190-0x0000000000D80000-0x0000000000D90000-memory.dmp

Filesize
64KB

Download
memory/3180-225-0x0000000000CA0000-0x0000000000CAA000-memory.dmp

Filesize
40KB

Download
memory/3180-224-0x0000000000D80000-0x0000000000D90000-memory.dmp

Filesize
64KB

Download
memory/3180-223-0x0000000000D80000-0x0000000000D90000-memory.dmp

Filesize
64KB

Download
memory/3180-222-0x0000000000D80000-0x0000000000D90000-memory.dmp

Filesize
64KB

Download
memory/3180-168-0x0000000008B60000-0x0000000008C9F000-memory.dmp

Filesize
1.2MB

Download
memory/3180-221-0x0000000000D80000-0x0000000000D90000-memory.dmp

Filesize
64KB

Download
memory/3180-220-0x0000000000D80000-0x0000000000D90000-memory.dmp

Filesize
64KB

Download
memory/3180-219-0x0000000000D80000-0x0000000000D90000-memory.dmp

Filesize
64KB

Download
memory/3180-218-0x0000000000D80000-0x0000000000D90000-memory.dmp

Filesize
64KB

Download
memory/3180-216-0x0000000000D80000-0x0000000000D90000-memory.dmp

Filesize
64KB

Download
memory/3180-217-0x0000000000D80000-0x0000000000D90000-memory.dmp

Filesize
64KB

Download
memory/3180-215-0x0000000000D80000-0x0000000000D90000-memory.dmp

Filesize
64KB

Download
memory/3180-175-0x0000000000D80000-0x0000000000D90000-memory.dmp

Filesize
64KB

Download
memory/3180-176-0x0000000000D80000-0x0000000000D90000-memory.dmp

Filesize
64KB

Download
memory/3180-177-0x0000000000DE0000-0x0000000000DF0000-memory.dmp

Filesize
64KB

Download
memory/3180-178-0x0000000000D80000-0x0000000000D90000-memory.dmp

Filesize
64KB

Download
memory/3180-179-0x0000000000D80000-0x0000000000D90000-memory.dmp

Filesize
64KB

Download
memory/3180-180-0x0000000000D80000-0x0000000000D90000-memory.dmp

Filesize
64KB

Download
memory/3180-181-0x0000000000D80000-0x0000000000D90000-memory.dmp

Filesize
64KB

Download
memory/3180-182-0x0000000000D80000-0x0000000000D90000-memory.dmp

Filesize
64KB

Download
memory/3180-183-0x0000000000D80000-0x0000000000D90000-memory.dmp

Filesize
64KB

Download
memory/3180-184-0x0000000000D80000-0x0000000000D90000-memory.dmp

Filesize
64KB

Download
memory/3180-185-0x0000000000D80000-0x0000000000D90000-memory.dmp

Filesize
64KB

Download
memory/3180-186-0x0000000000D80000-0x0000000000D90000-memory.dmp

Filesize
64KB

Download
memory/3180-187-0x0000000000D80000-0x0000000000D90000-memory.dmp

Filesize
64KB

Download
memory/3180-188-0x0000000000D80000-0x0000000000D90000-memory.dmp

Filesize
64KB

Download
memory/3180-189-0x0000000000D80000-0x0000000000D90000-memory.dmp

Filesize
64KB

Download
memory/3180-214-0x0000000000D80000-0x0000000000D90000-memory.dmp

Filesize
64KB

Download
memory/3180-191-0x0000000000D80000-0x0000000000D90000-memory.dmp

Filesize
64KB

Download
memory/3180-192-0x0000000002CD0000-0x0000000002CE0000-memory.dmp

Filesize
64KB

Download
memory/3180-193-0x0000000002CD0000-0x0000000002CE0000-memory.dmp

Filesize
64KB

Download
memory/3180-194-0x0000000002CD0000-0x0000000002CE0000-memory.dmp

Filesize
64KB

Download
memory/3180-213-0x0000000000D80000-0x0000000000D90000-memory.dmp

Filesize
64KB

Download
memory/3180-197-0x0000000008F40000-0x0000000009097000-memory.dmp

Filesize
1.3MB

Download
memory/3180-198-0x0000000008F40000-0x0000000009097000-memory.dmp

Filesize
1.3MB

Download
memory/3180-199-0x0000000000DE0000-0x0000000000DF0000-memory.dmp

Filesize
64KB

Download
memory/3180-200-0x0000000002CD0000-0x0000000002CE0000-memory.dmp

Filesize
64KB

Download
memory/3180-201-0x0000000002CD0000-0x0000000002CE0000-memory.dmp

Filesize
64KB

Download
memory/3180-212-0x0000000000D80000-0x0000000000D90000-memory.dmp

Filesize
64KB

Download
memory/3180-204-0x0000000008F40000-0x0000000009097000-memory.dmp

Filesize
1.3MB

Download
memory/3180-209-0x0000000000D80000-0x0000000000D90000-memory.dmp

Filesize
64KB

Download
memory/3180-210-0x0000000000D80000-0x0000000000D90000-memory.dmp

Filesize
64KB

Download
memory/3180-211-0x0000000000D80000-0x0000000000D90000-memory.dmp

Filesize
64KB

Download
memory/3344-167-0x0000000000E60000-0x0000000000E74000-memory.dmp

Filesize
80KB

Download
memory/3344-169-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/3344-163-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/3344-166-0x0000000000EF0000-0x000000000123A000-memory.dmp

Filesize
3.3MB

Download
memory/4220-172-0x00000000006C0000-0x00000000006EF000-memory.dmp

Filesize
188KB

Download
memory/4220-173-0x0000000002670000-0x00000000029BA000-memory.dmp

Filesize
3.3MB

Download
memory/4220-196-0x0000000002410000-0x00000000024A3000-memory.dmp

Filesize
588KB

Download
memory/4220-171-0x0000000000B60000-0x0000000000B66000-memory.dmp

Filesize
24KB

Download
memory/4220-174-0x00000000006C0000-0x00000000006EF000-memory.dmp

Filesize
188KB

Download
memory/4220-170-0x0000000000B60000-0x0000000000B66000-memory.dmp

Filesize
24KB

Download
memory/4928-133-0x0000000000AB0000-0x0000000000ACC000-memory.dmp

Filesize
112KB

Download
memory/4928-155-0x0000000005470000-0x0000000005480000-memory.dmp

Filesize
64KB

Download
memory/4928-134-0x0000000005470000-0x0000000005480000-memory.dmp

Filesize
64KB

Download
memory/4928-135-0x0000000006F40000-0x0000000006F62000-memory.dmp

Filesize
136KB

Download