formbook | b57ce95b3dff59901ccc6dbd3b5139dc285bf8723d65bf34434d0369ebb3cd8e

Analysis

max time kernel
149s
max time network
145s
platform
windows10-ltsc_2021_x64
resource
win10ltsc2021-20260513-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20260513-enlocale:en-usos:windows10-ltsc_2021-x64systemwindows
submitted
23/05/2026, 00:55

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General

Target
tmpukiimhn6.js
Size 2.0MB
Sample260523-a97ptscs8x
SHA256 b57ce95b3dff59901ccc6dbd3b5139dc285bf8723d65bf34434d0369ebb3cd8e
MD5 1c198165686703dcd7bc83d4f118b896
SHA1 f7ad9b9857360293c6ef76353bbe8b2f42761fd7
SHA512 bc279e2c9b921a48fc5313342b2860e92afddf5f9bbcece1210e34ef695da45a32be0e118c4b270f69c0d637b2b6525396e1c145ff096c4eb09efc2264679442
SSDEEP 49152:10DeJS6TQzEwQkKq+tZOwYr/NmssNZ0p8:b
TLSH
T17E95D00845D45FDCEE1D4C25ACF567AF537276A3CCED80ACB661BD829A43832C816BC9
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
behavioral1/memory/716-18-0x0000000000400000-0x0000000000446000-memory.dmp	family_formbook
behavioral1/memory/716-20-0x0000000000400000-0x0000000000446000-memory.dmp	family_formbook
behavioral1/memory/716-21-0x0000000000400000-0x0000000000446000-memory.dmp	family_formbook
behavioral1/memory/716-27-0x0000000000400000-0x0000000000446000-memory.dmp	family_formbook
behavioral1/memory/1100-29-0x0000000000BB0000-0x0000000000BF3000-memory.dmp	family_formbook
behavioral1/memory/1100-33-0x0000000000BB0000-0x0000000000BF3000-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
18	4856	wscript.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
5440	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-1-5-21-2684263265-1628758615-802431902-1000\Control Panel\International\Geo\Nation	wscript.exe

Suspicious use of SetThreadContext 11 IoCs

description	pid	Process	procid_target
PID 5440 set thread context of 5808	5440	powershell.exe	87
PID 5440 set thread context of 716	5440	powershell.exe	93
PID 716 set thread context of 4856	716	Aspnet_compiler.exe	84
PID 716 set thread context of 1100	716	Aspnet_compiler.exe	96
PID 5440 set thread context of 2404	5440	powershell.exe	100
PID 1100 set thread context of 4856	1100	msdt.exe	84
PID 5440 set thread context of 5960	5440	powershell.exe	101
PID 5440 set thread context of 4220	5440	powershell.exe	104
PID 5440 set thread context of 5260	5440	powershell.exe	105
PID 5440 set thread context of 2476	5440	powershell.exe	108
PID 5440 set thread context of 4088	5440	powershell.exe	111

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

Program crash 3 IoCs

pid	pid_target	Process	procid_target
5364	5808	WerFault.exe	87
2896	5260	WerFault.exe	105
4076	2476	WerFault.exe	108

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
2128	taskkill.exe

Suspicious behavior: EnumeratesProcesses 40 IoCs

pid	Process
5440	powershell.exe
5440	powershell.exe
5440	powershell.exe
5440	powershell.exe
5440	powershell.exe
716	Aspnet_compiler.exe
716	Aspnet_compiler.exe
716	Aspnet_compiler.exe
716	Aspnet_compiler.exe
716	Aspnet_compiler.exe
716	Aspnet_compiler.exe
716	Aspnet_compiler.exe
716	Aspnet_compiler.exe
5440	powershell.exe
1100	msdt.exe
1100	msdt.exe
1100	msdt.exe
1100	msdt.exe
1100	msdt.exe
1100	msdt.exe
1100	msdt.exe
1100	msdt.exe
5440	powershell.exe
5440	powershell.exe
5440	powershell.exe
2404	Aspnet_compiler.exe
2404	Aspnet_compiler.exe
5440	powershell.exe
5960	Aspnet_compiler.exe
5960	Aspnet_compiler.exe
5440	powershell.exe
5440	powershell.exe
5440	powershell.exe
4220	Aspnet_compiler.exe
4220	Aspnet_compiler.exe
5440	powershell.exe
5440	powershell.exe
5440	powershell.exe
4088	Aspnet_compiler.exe
4088	Aspnet_compiler.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
716	Aspnet_compiler.exe
4856	wscript.exe
4856	wscript.exe
1100	msdt.exe
1100	msdt.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5440	powershell.exe
Token: SeDebugPrivilege	2128	taskkill.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 4856 wrote to memory of 5440	4856	wscript.exe	85
PID 5440 wrote to memory of 5808	5440	powershell.exe	87
PID 5440 wrote to memory of 5808	5440	powershell.exe	87
PID 5440 wrote to memory of 5808	5440	powershell.exe	87
PID 5440 wrote to memory of 716	5440	powershell.exe	93
PID 5440 wrote to memory of 716	5440	powershell.exe	93
PID 5440 wrote to memory of 716	5440	powershell.exe	93
PID 4856 wrote to memory of 1100	4856	wscript.exe	96
PID 5440 wrote to memory of 1464	5440	powershell.exe	99
PID 5440 wrote to memory of 2404	5440	powershell.exe	100
PID 5440 wrote to memory of 2404	5440	powershell.exe	100
PID 5440 wrote to memory of 2404	5440	powershell.exe	100
PID 5440 wrote to memory of 5960	5440	powershell.exe	101
PID 5440 wrote to memory of 5960	5440	powershell.exe	101
PID 5440 wrote to memory of 5960	5440	powershell.exe	101
PID 5440 wrote to memory of 4196	5440	powershell.exe	103
PID 5440 wrote to memory of 4220	5440	powershell.exe	104
PID 5440 wrote to memory of 4220	5440	powershell.exe	104
PID 5440 wrote to memory of 4220	5440	powershell.exe	104
PID 5440 wrote to memory of 5260	5440	powershell.exe	105
PID 5440 wrote to memory of 5260	5440	powershell.exe	105
PID 5440 wrote to memory of 5260	5440	powershell.exe	105
PID 5440 wrote to memory of 2476	5440	powershell.exe	108
PID 5440 wrote to memory of 2476	5440	powershell.exe	108
PID 5440 wrote to memory of 2476	5440	powershell.exe	108
PID 5440 wrote to memory of 4088	5440	powershell.exe	111
PID 5440 wrote to memory of 4088	5440	powershell.exe	111
PID 5440 wrote to memory of 4088	5440	powershell.exe	111
PID 4856 wrote to memory of 3468	4856	wscript.exe	112
PID 3468 wrote to memory of 2128	3468	cmd.exe	114

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\tmpukiimhn6.js
1⤵
- Badlisted process makes network request
- Checks computer location settings
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4856
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -ExecutionPolicy Bypass -NoProfile -WindowStyle Hidden -NonInteractive -NoLogo -File "C:\Temp\ps_dLTDVJol2ry5_1779497751086.ps1"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:5440
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\Aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Aspnet_compiler.exe"
    3⤵
    PID:5808
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 5808 -s 196
      4⤵
      Program crash
      PID:5364
- - 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:716
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\Aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Aspnet_compiler.exe"
    3⤵
    PID:1464
- - 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:2404
- - 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:5960
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\Aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Aspnet_compiler.exe"
    3⤵
    PID:4196
- - 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:4220
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\Aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Aspnet_compiler.exe"
    3⤵
    PID:5260
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 5260 -s 196
      4⤵
      Program crash
      PID:2896
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\Aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Aspnet_compiler.exe"
    3⤵
    PID:2476
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2476 -s 204
      4⤵
      Program crash
      PID:4076
- - 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:4088
- 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:1100
- 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:3468
- - C:\Windows\system32\taskkill.exe
    taskkill /f /im wscript.exe
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2128

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 5808 -ip 5808
1⤵
PID:2216

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 5260 -ip 5260
1⤵
PID:2912

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 2476 -ip 2476
1⤵
PID:3868

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

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Downloads

ps_dLTDVJol2ry5_1779497751086.ps1

Path C:\Temp\ps_dLTDVJol2ry5_1779497751086.ps1
Size 1.4MB
SHA256 6179285647f23e1e22766963321403db510872984e23c20b2cd9cbe246829dc0
MD5 f35e38c7caaac92e2e7f649848cca514
SHA1 70ffe22801a34e376c2e70534a55d54a6ea1e625
SHA512 11b3f3201bc00206c25f627a6dac766d2500c4d872b6f7eba106026b614feb2760680c222c20babf97b118033cae6c911e7837e80d14f93bb38a3ecba4a74fec
SSDEEP 24576:IksVkLyufMboBzY9FzxQz2LD2ZYvawf3S+3dVbCEP6o2zO1mq7r:rcUCOcNVr
TLSH
T11B65AECAB2F2B779A92816311C91A54CBBC24F32D776283B78054F432716C962DE6FD4
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

__PSScriptPolicyTest_ssmcuphs.5nh.ps1

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

Submit Download

memory/716-26-0x0000000000400000-0x0000000000446000-memory.dmp

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memory/716-22-0x00000000027E0000-0x0000000002803000-memory.dmp

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memory/716-27-0x0000000000400000-0x0000000000446000-memory.dmp

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memory/716-28-0x00000000027E0000-0x0000000002803000-memory.dmp

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memory/716-20-0x0000000000400000-0x0000000000446000-memory.dmp

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memory/716-19-0x00000000014C0000-0x000000000180C000-memory.dmp

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memory/716-21-0x0000000000400000-0x0000000000446000-memory.dmp

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memory/716-18-0x0000000000400000-0x0000000000446000-memory.dmp

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memory/1100-25-0x0000000000BB0000-0x0000000000BF3000-memory.dmp

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memory/1100-33-0x0000000000BB0000-0x0000000000BF3000-memory.dmp

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memory/1100-24-0x0000000000BB0000-0x0000000000BF3000-memory.dmp

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memory/1100-29-0x0000000000BB0000-0x0000000000BF3000-memory.dmp

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memory/4856-39-0x000001E5E90F0000-0x000001E5E91BD000-memory.dmp

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memory/4856-32-0x000001E5E90F0000-0x000001E5E91BD000-memory.dmp

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memory/4856-30-0x0000000000DE0000-0x0000000001DAD000-memory.dmp

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memory/4856-23-0x0000000000DE0000-0x0000000001DAD000-memory.dmp

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memory/5440-1-0x00000253F4EF0000-0x00000253F4F00000-memory.dmp

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memory/5440-13-0x00000253F7EF0000-0x00000253F7F0A000-memory.dmp

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memory/5440-11-0x00000253F4EF0000-0x00000253F4F00000-memory.dmp

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memory/5440-16-0x00000253F4EF0000-0x00000253F4F00000-memory.dmp

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memory/5440-2-0x00000253F4EF0000-0x00000253F4F00000-memory.dmp

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memory/5440-15-0x00000253F4EF0000-0x00000253F4F00000-memory.dmp

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memory/5440-10-0x00000253F72E0000-0x00000253F7302000-memory.dmp

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memory/5808-14-0x0000000000400000-0x0000000000446000-memory.dmp

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