formbook | 5902402fafb4be22faca64535718137ce5afd70004a14657daa9e7c6c3240feb

General

Target

ekstre_pdf.exe
Size

308KB
MD5

a37dc47f86e84e5d0d2e6414c3cd5272
SHA1

7c9a14ff443cc5de805200d6bcc750d64fb4b677
SHA256

5902402fafb4be22faca64535718137ce5afd70004a14657daa9e7c6c3240feb
SHA512

5f7cae8e6dc0f6d35c56ec212943359d78ae792f6dcbd8eb5987c1d8e020c49befa23951788fda56550ca83b05a478c7fbbc0c6178c9b1830b6050741a7638a3
SSDEEP

6144:XhtyHU2Gthj3FRzxZckklMg0GGOvGmADclkMo6xkHwQEel:Xh4G9NxWBZ0VOvGm+cpRxg/Eel

Score

10^/10

formbook guloader mi94 downloader rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

mi94

Decoy

realdigitalmarketing.co.uk

athle91.com

zetuinteriors.africa

jewelry2adore.biz

sneakersuomo.com

hotcoa.com

bestpetfinds.com

elatedfreedom.com

louisegoulet.com

licensescape.com

jenniferfalconerrealtor.com

xqan.net

textare.net

doctorlinkscsk.link

bizformspro.com

ameriealthcaritasfl.com

hanfengmeiye.com

anjin98.com

credit-cards-54889.com

dinero.news

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader

Formbook payload 4 IoCs

rat

resource	yara_rule
behavioral1/memory/332-90-0x0000000000400000-0x0000000001462000-memory.dmp	formbook
behavioral1/memory/332-98-0x0000000000400000-0x0000000001462000-memory.dmp	formbook
behavioral1/memory/1972-101-0x00000000000D0000-0x00000000000FF000-memory.dmp	formbook
behavioral1/memory/1972-103-0x00000000000D0000-0x00000000000FF000-memory.dmp	formbook

Checks QEMU agent file 2 TTPs 2 IoCs

Checks presence of QEMU agent, possibly to detect virtualization.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	ekstre_pdf.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	ekstre_pdf.exe

Deletes itself 1 IoCs

pid	Process
1676	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
1048	ekstre_pdf.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
332	ekstre_pdf.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1048	ekstre_pdf.exe
332	ekstre_pdf.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1048 set thread context of 332	1048	ekstre_pdf.exe	26
PID 332 set thread context of 1380	332	ekstre_pdf.exe	10
PID 1972 set thread context of 1380	1972	NETSTAT.EXE	10

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\Fortalelserne\Wisconsinites\Ubeslutsomt.Her	ekstre_pdf.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Gathers network information 2 TTPs 1 IoCs

Uses commandline utility to view network configuration.

System Information Discovery

T1082

Command-Line Interface

T1059

pid	Process
1972	NETSTAT.EXE

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
332	ekstre_pdf.exe
332	ekstre_pdf.exe
1972	NETSTAT.EXE
1972	NETSTAT.EXE
1972	NETSTAT.EXE
1972	NETSTAT.EXE
1972	NETSTAT.EXE
1972	NETSTAT.EXE
1972	NETSTAT.EXE
1972	NETSTAT.EXE
1972	NETSTAT.EXE
1972	NETSTAT.EXE
1972	NETSTAT.EXE
1972	NETSTAT.EXE

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1380	Explorer.EXE

Suspicious behavior: MapViewOfSection 6 IoCs

pid	Process
1048	ekstre_pdf.exe
332	ekstre_pdf.exe
332	ekstre_pdf.exe
332	ekstre_pdf.exe
1972	NETSTAT.EXE
1972	NETSTAT.EXE

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	332	ekstre_pdf.exe
Token: SeShutdownPrivilege	1380	Explorer.EXE
Token: SeDebugPrivilege	1972	NETSTAT.EXE

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
1380	Explorer.EXE
1380	Explorer.EXE

Suspicious use of SendNotifyMessage 2 IoCs

pid	Process
1380	Explorer.EXE
1380	Explorer.EXE

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 1048 wrote to memory of 332	1048	ekstre_pdf.exe	26
PID 1048 wrote to memory of 332	1048	ekstre_pdf.exe	26
PID 1048 wrote to memory of 332	1048	ekstre_pdf.exe	26
PID 1048 wrote to memory of 332	1048	ekstre_pdf.exe	26
PID 1048 wrote to memory of 332	1048	ekstre_pdf.exe	26
PID 1380 wrote to memory of 1972	1380	Explorer.EXE	29
PID 1380 wrote to memory of 1972	1380	Explorer.EXE	29
PID 1380 wrote to memory of 1972	1380	Explorer.EXE	29
PID 1380 wrote to memory of 1972	1380	Explorer.EXE	29
PID 1972 wrote to memory of 1676	1972	NETSTAT.EXE	30
PID 1972 wrote to memory of 1676	1972	NETSTAT.EXE	30
PID 1972 wrote to memory of 1676	1972	NETSTAT.EXE	30
PID 1972 wrote to memory of 1676	1972	NETSTAT.EXE	30

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1380
- C:\Users\Admin\AppData\Local\Temp\ekstre_pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\ekstre_pdf.exe"
  2⤵
  - Checks QEMU agent file
  - Loads dropped DLL
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of SetThreadContext
  - Drops file in Windows directory
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:1048
- - C:\Users\Admin\AppData\Local\Temp\ekstre_pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\ekstre_pdf.exe"
    3⤵
    - Checks QEMU agent file
    - Suspicious use of NtCreateThreadExHideFromDebugger
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:332
- C:\Windows\SysWOW64\NETSTAT.EXE
  "C:\Windows\SysWOW64\NETSTAT.EXE"
  2⤵
  - Suspicious use of SetThreadContext
  - Gathers network information
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1972
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\ekstre_pdf.exe"
    3⤵
    - Deletes itself
    PID:1676

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Command-Line Interface

1

T1059

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\DORME.ini

Filesize
31B

MD5
3000f7f0f12b7139ea28160c52098e25

SHA1
9d032395f38d341881019b996e591160d542054b

SHA256
467b09ff26622746d205628ae325ec9838461bc5fe741b3757bb39ddec87ecb1

SHA512
a76a2f1e3686e2ffd03388ec7dbcd4afa6ae53ccd3aa40c6fbbf0c994eee5e2685d0c412f15ec4506c1175f5a84712e1a8b7ae32e6a0327e1ba47321a59e0ee2

Download Submit
\Users\Admin\AppData\Local\Temp\nso7725.tmp\System.dll

Filesize
12KB

MD5
d968cb2b98b83c03a9f02dd9b8df97dc

SHA1
d784c9b7a92dce58a5038beb62a48ff509e166a0

SHA256
a4ec98011ef99e595912718c1a1bf1aa67bfc2192575729d42f559d01f67b95c

SHA512
2ee41dc68f329a1519a8073ece7d746c9f3bf45d8ef3b915deb376af37e26074134af5f83c8af0fe0ab227f0d1acca9f37e5ca7ae37c46c3bcc0331fe5e2b97e

Download Submit
memory/332-94-0x00000000335F0000-0x0000000033605000-memory.dmp

Filesize
84KB

Download
memory/332-96-0x0000000001470000-0x0000000003941000-memory.dmp

Filesize
36.8MB

Download
memory/332-83-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/332-84-0x0000000001470000-0x0000000003941000-memory.dmp

Filesize
36.8MB

Download
memory/332-85-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/332-86-0x0000000001470000-0x0000000003941000-memory.dmp

Filesize
36.8MB

Download
memory/332-88-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/332-90-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/332-91-0x0000000001470000-0x0000000003941000-memory.dmp

Filesize
36.8MB

Download
memory/332-93-0x0000000033C20000-0x0000000033F23000-memory.dmp

Filesize
3.0MB

Download
memory/332-98-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1048-81-0x0000000003660000-0x0000000005B31000-memory.dmp

Filesize
36.8MB

Download
memory/1048-82-0x0000000003660000-0x0000000005B31000-memory.dmp

Filesize
36.8MB

Download
memory/1380-106-0x0000000000240000-0x0000000000340000-memory.dmp

Filesize
1024KB

Download
memory/1380-95-0x0000000003910000-0x0000000003A17000-memory.dmp

Filesize
1.0MB

Download
memory/1380-92-0x0000000003810000-0x0000000003910000-memory.dmp

Filesize
1024KB

Download
memory/1380-107-0x0000000007C60000-0x0000000007D6C000-memory.dmp

Filesize
1.0MB

Download
memory/1380-108-0x0000000007C60000-0x0000000007D6C000-memory.dmp

Filesize
1.0MB

Download
memory/1380-111-0x0000000007C60000-0x0000000007D6C000-memory.dmp

Filesize
1.0MB

Download
memory/1972-99-0x0000000000AE0000-0x0000000000AE9000-memory.dmp

Filesize
36KB

Download
memory/1972-101-0x00000000000D0000-0x00000000000FF000-memory.dmp

Filesize
188KB

Download
memory/1972-102-0x0000000002080000-0x0000000002383000-memory.dmp

Filesize
3.0MB

Download
memory/1972-103-0x00000000000D0000-0x00000000000FF000-memory.dmp

Filesize
188KB

Download
memory/1972-105-0x0000000001EF0000-0x0000000001F84000-memory.dmp

Filesize
592KB

Download
memory/1972-97-0x0000000000AE0000-0x0000000000AE9000-memory.dmp

Filesize
36KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads