formbook | 1da1d27f8c3f4188f1767f87ae85c14e1fda3fa80142af97697864580f1a2397

General

Target

tmp.exe
Size

1.8MB
MD5

e4a076e7e4ef7dda7760195ed7e69a63
SHA1

01a916d1cb5acae7bcd2e8382d9a3691a2b90b39
SHA256

1da1d27f8c3f4188f1767f87ae85c14e1fda3fa80142af97697864580f1a2397
SHA512

8b23da6af698c2431bb7828291b5da97ba0f0bb87e7f51d623e083eb0e4b408fbb14725b043941ac1afee5dbae6d6c6d4d3780ecc17cd16ad4686b76a4797dbd
SSDEEP

24576:2QpweQZGHo2z01GURwAsmMt+Z1fQh0UXtk/O93eIu0:GGH/b+Z1fQh0Uygu0

Score

10^/10

formbook ar73 rat spyware stealer trojan

Malware Config

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

Formbook payload 4 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/3840-166-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/3840-170-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/4844-175-0x00000000007A0000-0x00000000007CF000-memory.dmp	formbook
behavioral2/memory/4844-177-0x00000000007A0000-0x00000000007CF000-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.exechkdsk.exe

description	pid	process	target process
PID 3700 set thread context of 3840	3700	tmp.exe	MSBuild.exe
PID 3840 set thread context of 3168	3840	MSBuild.exe	Explorer.EXE
PID 4844 set thread context of 3168	4844	chkdsk.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
Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry
T1012

System Information Discovery
T1082

Processes:

chkdsk.exe

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier chkdsk.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	chkdsk.exe

Suspicious behavior: EnumeratesProcesses 52 IoCs

Processes:

powershell.exeMSBuild.exechkdsk.exe

pid	process
4756	powershell.exe
4756	powershell.exe
3840	MSBuild.exe
3840	MSBuild.exe
3840	MSBuild.exe
3840	MSBuild.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe
4844	chkdsk.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

3168 Explorer.EXE
Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

MSBuild.exechkdsk.exe

pid process

3840 MSBuild.exe
3840 MSBuild.exe
3840 MSBuild.exe
4844 chkdsk.exe
4844 chkdsk.exe

pid	process
3168	Explorer.EXE

pid	process
3840	MSBuild.exe
3840	MSBuild.exe
3840	MSBuild.exe
4844	chkdsk.exe
4844	chkdsk.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

tmp.exepowershell.exeMSBuild.exechkdsk.exe

description	pid	process
Token: SeDebugPrivilege	3700	tmp.exe
Token: SeDebugPrivilege	4756	powershell.exe
Token: SeDebugPrivilege	3840	MSBuild.exe
Token: SeDebugPrivilege	4844	chkdsk.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

tmp.exeExplorer.EXEchkdsk.exe

description	pid	process	target process
PID 3700 wrote to memory of 4756	3700	tmp.exe	powershell.exe
PID 3700 wrote to memory of 4756	3700	tmp.exe	powershell.exe
PID 3700 wrote to memory of 4756	3700	tmp.exe	powershell.exe
PID 3700 wrote to memory of 3840	3700	tmp.exe	MSBuild.exe
PID 3700 wrote to memory of 3840	3700	tmp.exe	MSBuild.exe
PID 3700 wrote to memory of 3840	3700	tmp.exe	MSBuild.exe
PID 3700 wrote to memory of 3840	3700	tmp.exe	MSBuild.exe
PID 3700 wrote to memory of 3840	3700	tmp.exe	MSBuild.exe
PID 3700 wrote to memory of 3840	3700	tmp.exe	MSBuild.exe
PID 3168 wrote to memory of 4844	3168	Explorer.EXE	chkdsk.exe
PID 3168 wrote to memory of 4844	3168	Explorer.EXE	chkdsk.exe
PID 3168 wrote to memory of 4844	3168	Explorer.EXE	chkdsk.exe
PID 4844 wrote to memory of 4700	4844	chkdsk.exe	cmd.exe
PID 4844 wrote to memory of 4700	4844	chkdsk.exe	cmd.exe
PID 4844 wrote to memory of 4700	4844	chkdsk.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:3168

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:3700

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:4756

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:3840

C:\Windows\SysWOW64\chkdsk.exe
"C:\Windows\SysWOW64\chkdsk.exe"
2⤵
- Suspicious use of SetThreadContext
- Enumerates system info in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4844

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
3⤵
PID:4700

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_cgisds31.5n3.ps1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3168-183-0x0000000003310000-0x00000000033DB000-memory.dmp

Filesize
812KB

Download
memory/3168-172-0x0000000008B00000-0x0000000008C34000-memory.dmp

Filesize
1.2MB

Download
memory/3168-180-0x0000000003310000-0x00000000033DB000-memory.dmp

Filesize
812KB

Download
memory/3168-181-0x0000000003310000-0x00000000033DB000-memory.dmp

Filesize
812KB

Download
memory/3700-133-0x0000000000930000-0x0000000000AFA000-memory.dmp

Filesize
1.8MB

Download
memory/3700-138-0x00000000083E0000-0x0000000008402000-memory.dmp

Filesize
136KB

Download
memory/3700-137-0x00000000056B0000-0x00000000056C0000-memory.dmp

Filesize
64KB

Download
memory/3700-158-0x00000000056B0000-0x00000000056C0000-memory.dmp

Filesize
64KB

Download
memory/3700-136-0x00000000054E0000-0x00000000054EA000-memory.dmp

Filesize
40KB

Download
memory/3700-135-0x0000000005560000-0x00000000055F2000-memory.dmp

Filesize
584KB

Download
memory/3700-134-0x0000000005A70000-0x0000000006014000-memory.dmp

Filesize
5.6MB

Download
memory/3840-170-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/3840-171-0x00000000018E0000-0x00000000018F4000-memory.dmp

Filesize
80KB

Download
memory/3840-169-0x0000000001970000-0x0000000001CBA000-memory.dmp

Filesize
3.3MB

Download
memory/3840-166-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/4756-141-0x0000000004C20000-0x0000000005248000-memory.dmp

Filesize
6.2MB

Download
memory/4756-148-0x0000000005400000-0x0000000005466000-memory.dmp

Filesize
408KB

Download
memory/4756-159-0x0000000000DF0000-0x0000000000E00000-memory.dmp

Filesize
64KB

Download
memory/4756-160-0x0000000000DF0000-0x0000000000E00000-memory.dmp

Filesize
64KB

Download
memory/4756-161-0x0000000000DF0000-0x0000000000E00000-memory.dmp

Filesize
64KB

Download
memory/4756-156-0x0000000007060000-0x00000000076DA000-memory.dmp

Filesize
6.5MB

Download
memory/4756-155-0x0000000000DF0000-0x0000000000E00000-memory.dmp

Filesize
64KB

Download
memory/4756-154-0x0000000005A00000-0x0000000005A1E000-memory.dmp

Filesize
120KB

Download
memory/4756-153-0x0000000000DF0000-0x0000000000E00000-memory.dmp

Filesize
64KB

Download
memory/4756-157-0x0000000005F00000-0x0000000005F1A000-memory.dmp

Filesize
104KB

Download
memory/4756-139-0x0000000000C90000-0x0000000000CC6000-memory.dmp

Filesize
216KB

Download
memory/4756-140-0x0000000000DF0000-0x0000000000E00000-memory.dmp

Filesize
64KB

Download
memory/4756-142-0x0000000005320000-0x0000000005386000-memory.dmp

Filesize
408KB

Download
memory/4844-176-0x00000000010F0000-0x000000000143A000-memory.dmp

Filesize
3.3MB

Download
memory/4844-177-0x00000000007A0000-0x00000000007CF000-memory.dmp

Filesize
188KB

Download
memory/4844-179-0x0000000000F80000-0x0000000001013000-memory.dmp

Filesize
588KB

Download
memory/4844-175-0x00000000007A0000-0x00000000007CF000-memory.dmp

Filesize
188KB

Download
memory/4844-174-0x0000000000280000-0x000000000028A000-memory.dmp

Filesize
40KB

Download
memory/4844-173-0x0000000000280000-0x000000000028A000-memory.dmp

Filesize
40KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

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Downloads