formbook | fb05809e17753c5ac6c04b88d8a187b2392c1f912b3951273f39bb63e9228d55

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
02/06/2026, 13:28

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General

Target
tmpwu7cbv6e.js
Size 2.0MB
Sample260602-qqmtbaet8x
SHA256 fb05809e17753c5ac6c04b88d8a187b2392c1f912b3951273f39bb63e9228d55
MD5 4d2e25ebe9d511b48900801911a3075b
SHA1 9dbe54e0b13216019680ca75d94a5759dc01c1c8
SHA512 6f899f71bd8aaeacc6e54ba18443bf1eb730e7394698f53f4b5f2c98e9e188d64ea3c7b0c10dc43ac8bcff80f9503ed41e6ee644f7ccd591fa2d841c5983a657
SSDEEP 49152:L+2l1CdeCQAkwDOlTFvD/YMJ7gMJvWJ2hU8i:i
TLSH
T16D95C065EBC97FA5EA5CDE1AB42D9E0E71721DC224CBA9C5F2520C43CE7E41804631AF
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

defense_evasion discovery execution formbook rat spyware stealer trojan

Malware Config

Signatures

Family: Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook

Formbook payload 6 IoCs

rat

resource	yara_rule
behavioral2/memory/2948-18-0x0000000000400000-0x0000000000446000-memory.dmp	family_formbook
behavioral2/memory/2948-21-0x0000000000400000-0x0000000000446000-memory.dmp	family_formbook
behavioral2/memory/2948-20-0x0000000000400000-0x0000000000446000-memory.dmp	family_formbook
behavioral2/memory/2948-27-0x0000000000400000-0x0000000000446000-memory.dmp	family_formbook
behavioral2/memory/1580-29-0x0000000000560000-0x00000000005A3000-memory.dmp	family_formbook
behavioral2/memory/1580-33-0x0000000000560000-0x00000000005A3000-memory.dmp	family_formbook

Badlisted process makes network request 1 IoCs

Network request originating from process or tool commonly abused by malware.

flow	pid	Process
44	2068	wscript.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
4372	powershell.exe

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1788976790-1541110888-1636651838-1000\Control Panel\International\Geo\Nation	wscript.exe

Suspicious use of SetThreadContext 11 IoCs

description	pid	Process	procid_target
PID 4372 set thread context of 2948	4372	powershell.exe	93
PID 2948 set thread context of 2068	2948	Aspnet_compiler.exe	87
PID 2948 set thread context of 1580	2948	Aspnet_compiler.exe	94
PID 4372 set thread context of 4644	4372	powershell.exe	102
PID 1580 set thread context of 2068	1580	msdt.exe	87
PID 4372 set thread context of 4176	4372	powershell.exe	107
PID 4372 set thread context of 2304	4372	powershell.exe	109
PID 4372 set thread context of 3732	4372	powershell.exe	113
PID 4372 set thread context of 4836	4372	powershell.exe	115
PID 4372 set thread context of 2748	4372	powershell.exe	116
PID 4372 set thread context of 3784	4372	powershell.exe	117

Command and Scripting Interpreter: JavaScript 1 TTPs
execution

JavaScript
T1059.007
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msdt.exe

Kills process with taskkill 1 IoCs

defense_evasion

pid	Process
4276	taskkill.exe

Suspicious behavior: EnumeratesProcesses 46 IoCs

pid	Process
4372	powershell.exe
4372	powershell.exe
4372	powershell.exe
4372	powershell.exe
2948	Aspnet_compiler.exe
2948	Aspnet_compiler.exe
2948	Aspnet_compiler.exe
2948	Aspnet_compiler.exe
2948	Aspnet_compiler.exe
2948	Aspnet_compiler.exe
2948	Aspnet_compiler.exe
2948	Aspnet_compiler.exe
4372	powershell.exe
4372	powershell.exe
1580	msdt.exe
1580	msdt.exe
1580	msdt.exe
1580	msdt.exe
1580	msdt.exe
1580	msdt.exe
1580	msdt.exe
1580	msdt.exe
4372	powershell.exe
4644	Aspnet_compiler.exe
4644	Aspnet_compiler.exe
4372	powershell.exe
4176	Aspnet_compiler.exe
4176	Aspnet_compiler.exe
4372	powershell.exe
2304	Aspnet_compiler.exe
2304	Aspnet_compiler.exe
4372	powershell.exe
4372	powershell.exe
4372	powershell.exe
3732	Aspnet_compiler.exe
3732	Aspnet_compiler.exe
4372	powershell.exe
4836	Aspnet_compiler.exe
4836	Aspnet_compiler.exe
4836	Aspnet_compiler.exe
4372	powershell.exe
2748	Aspnet_compiler.exe
2748	Aspnet_compiler.exe
4372	powershell.exe
3784	Aspnet_compiler.exe
3784	Aspnet_compiler.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
2948	Aspnet_compiler.exe
2068	wscript.exe
2068	wscript.exe
1580	msdt.exe
1580	msdt.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4372	powershell.exe
Token: SeDebugPrivilege	4276	taskkill.exe

Suspicious use of WriteProcessMemory 29 IoCs

description	pid	Process	procid_target
PID 2068 wrote to memory of 4372	2068	wscript.exe	89
PID 4372 wrote to memory of 2948	4372	powershell.exe	93
PID 4372 wrote to memory of 2948	4372	powershell.exe	93
PID 4372 wrote to memory of 2948	4372	powershell.exe	93
PID 2068 wrote to memory of 1580	2068	wscript.exe	94
PID 4372 wrote to memory of 4644	4372	powershell.exe	102
PID 4372 wrote to memory of 4644	4372	powershell.exe	102
PID 4372 wrote to memory of 4644	4372	powershell.exe	102
PID 4372 wrote to memory of 4176	4372	powershell.exe	107
PID 4372 wrote to memory of 4176	4372	powershell.exe	107
PID 4372 wrote to memory of 4176	4372	powershell.exe	107
PID 4372 wrote to memory of 2304	4372	powershell.exe	109
PID 4372 wrote to memory of 2304	4372	powershell.exe	109
PID 4372 wrote to memory of 2304	4372	powershell.exe	109
PID 4372 wrote to memory of 1396	4372	powershell.exe	112
PID 4372 wrote to memory of 3732	4372	powershell.exe	113
PID 4372 wrote to memory of 3732	4372	powershell.exe	113
PID 4372 wrote to memory of 3732	4372	powershell.exe	113
PID 4372 wrote to memory of 4836	4372	powershell.exe	115
PID 4372 wrote to memory of 4836	4372	powershell.exe	115
PID 4372 wrote to memory of 4836	4372	powershell.exe	115
PID 4372 wrote to memory of 2748	4372	powershell.exe	116
PID 4372 wrote to memory of 2748	4372	powershell.exe	116
PID 4372 wrote to memory of 2748	4372	powershell.exe	116
PID 4372 wrote to memory of 3784	4372	powershell.exe	117
PID 4372 wrote to memory of 3784	4372	powershell.exe	117
PID 4372 wrote to memory of 3784	4372	powershell.exe	117
PID 2068 wrote to memory of 1476	2068	wscript.exe	118
PID 1476 wrote to memory of 4276	1476	cmd.exe	120

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\tmpwu7cbv6e.js
1⤵
- Badlisted process makes network request
- Checks computer location settings
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2068
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -ExecutionPolicy Bypass -NoProfile -WindowStyle Hidden -NonInteractive -NoLogo -File "C:\Temp\ps_Ncqo8LzK8Eq8_1780406885837.ps1"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4372
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\Aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Aspnet_compiler.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    PID:2948
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\Aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Aspnet_compiler.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:4644
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\Aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Aspnet_compiler.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:4176
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\Aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Aspnet_compiler.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:2304
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\Aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Aspnet_compiler.exe"
    3⤵
    PID:1396
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\Aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Aspnet_compiler.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:3732
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\Aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Aspnet_compiler.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:4836
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\Aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Aspnet_compiler.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:2748
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\Aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Aspnet_compiler.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:3784
- C:\Windows\SysWOW64\msdt.exe
  "C:\Windows\SysWOW64\msdt.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  PID:1580
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /f /im wscript.exe >nul 2>&1
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1476
- - C:\Windows\system32\taskkill.exe
    taskkill /f /im wscript.exe
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:4276

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

JavaScript

T1059.007

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

ps_Ncqo8LzK8Eq8_1780406885837.ps1

Path C:\Temp\ps_Ncqo8LzK8Eq8_1780406885837.ps1
Size 1.4MB
SHA256 30b9073c805ef726183503ad4505446f2f0f695e633fee4ae97ce13f7caac946
MD5 b629153eb3681e0fb3ae0af42f1eccf0
SHA1 4c0e924330d271a2eb649a9ab8d4f6f5e37dd071
SHA512 26ef1722396418114251b9937704a198fe6eca489c9b4ea556e89315700c363fce83df276adb2a5d79dbff5dff6fbc4df39bc8aa3dbf2aa9d3e3a0487531baec
SSDEEP 24576:PcPyatj2F0Bh0R5c+VAEQZ9YZh8/XimvnFNxvKRJ3gwomBP8u0:UPvAnATQmvFNZKvQca
TLSH
T1A5657DD3BF0AC13C58A15C0A5A85F21C7BCDD712C8761195BE6AA316C4C0D69A7F8B3E
MD5 SHA1 SHA512 SSDEEP TLSH

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__PSScriptPolicyTest_q02tz4un.r3i.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_q02tz4un.r3i.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
TLSH
T177A02228CC303B200020C0080A000002C00B800C080C8C0220000A00B20B820002F080
MD5 SHA1 SHA512 TLSH

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memory/1580-25-0x0000000000560000-0x00000000005A3000-memory.dmp

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memory/1580-33-0x0000000000560000-0x00000000005A3000-memory.dmp

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memory/1580-29-0x0000000000560000-0x00000000005A3000-memory.dmp

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memory/1580-26-0x0000000000560000-0x00000000005A3000-memory.dmp

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memory/2068-39-0x0000021CA7970000-0x0000021CA7A50000-memory.dmp

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memory/2068-31-0x0000021CA7970000-0x0000021CA7A50000-memory.dmp

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memory/2948-19-0x0000000000FC0000-0x000000000130A000-memory.dmp

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memory/2948-28-0x0000000000EE0000-0x0000000000F03000-memory.dmp

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memory/2948-18-0x0000000000400000-0x0000000000446000-memory.dmp

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memory/2948-27-0x0000000000400000-0x0000000000446000-memory.dmp

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memory/2948-15-0x0000000000400000-0x0000000000446000-memory.dmp

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memory/2948-21-0x0000000000400000-0x0000000000446000-memory.dmp

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memory/2948-20-0x0000000000400000-0x0000000000446000-memory.dmp

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memory/2948-23-0x0000000000EE0000-0x0000000000F03000-memory.dmp

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memory/4372-22-0x0000016276780000-0x0000016276790000-memory.dmp

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memory/4372-24-0x0000016276780000-0x0000016276790000-memory.dmp

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memory/4372-1-0x0000016276780000-0x0000016276790000-memory.dmp

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memory/4372-14-0x0000016276780000-0x0000016276790000-memory.dmp

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memory/4372-16-0x0000016276780000-0x0000016276790000-memory.dmp

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memory/4372-17-0x0000016276780000-0x0000016276790000-memory.dmp

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memory/4372-13-0x0000016278B70000-0x0000016278B8A000-memory.dmp

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memory/4372-12-0x0000016276780000-0x0000016276790000-memory.dmp

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memory/4372-3-0x0000016278800000-0x0000016278822000-memory.dmp

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memory/4372-2-0x0000016276780000-0x0000016276790000-memory.dmp

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