formbook | 884c7ea15aba23c993192d3c0641508443f594ae71c15d068d42fe7022ad82b5

General

Target

41f341ae994cf53488e0a96a6a531c9ef26c31ad763b7f858b278657051be31d.exe
Size

532KB
MD5

b2f556607df50936eb1c0664034427ba
SHA1

7ca4894a3804e721e85d31941bec38170099226e
SHA256

41f341ae994cf53488e0a96a6a531c9ef26c31ad763b7f858b278657051be31d
SHA512

a1ded171b38c3e5a37dba096e8c04b19c7cd3e46587b7681c00df2baad1e28a2ac917857e0c59de7448ed353383dc6b75c4f2cd93804028e05223bada11b471a
SSDEEP

6144:VaUDG3Kp1D6VEJD6LpypZ5xw6ZzzyJ9VecftKGjiqG4ErnbST6n+lDAAG8:VaUDd76VEt6QpZ5x+ltBmqG4ErmdAAr

Score

10^/10

formbook 73dc agilenet discovery rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

73dc

Decoy

qaimd.info

masterlatform.net

daokequan-pdd.com

danieldelcarmen.com

nissancraft.com

gwenscuisine.com

caoyejiasi.com

jobscsra.com

drinkgarden.com

kountrygirljewelry.com

bavariaimmolounge.com

tepthera.com

buzzstones.com

massagemmasculinaemsp.net

prettymixy.com

czczjy.com

yourorder.win

bridgesbecrazy.com

669usf.info

keithnewbyartgallery.com

Signatures

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

Formbook payload 3 IoCs

rat

resource	yara_rule
behavioral1/memory/2892-1-0x0000000000B90000-0x0000000000C1A000-memory.dmp	formbook
behavioral1/memory/2680-17-0x0000000000400000-0x000000000042D000-memory.dmp	formbook
behavioral1/memory/2680-22-0x0000000000400000-0x000000000042D000-memory.dmp	formbook

Executes dropped EXE 1 IoCs

pid	Process
2680	AddInProcess32.exe

Loads dropped DLL 1 IoCs

pid	Process
2892	41f341ae994cf53488e0a96a6a531c9ef26c31ad763b7f858b278657051be31d.exe

Obfuscated with Agile.Net obfuscator 1 IoCs

Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

agilenet

resource	yara_rule
behavioral1/memory/2892-2-0x00000000002E0000-0x00000000002F4000-memory.dmp	agile_net

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2892 set thread context of 2680	2892	41f341ae994cf53488e0a96a6a531c9ef26c31ad763b7f858b278657051be31d.exe	31
PID 2680 set thread context of 1252	2680	AddInProcess32.exe	21

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1528	2420	WerFault.exe	32

System Location Discovery: System Language Discovery 1 TTPs 2 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	41f341ae994cf53488e0a96a6a531c9ef26c31ad763b7f858b278657051be31d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msiexec.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2892	41f341ae994cf53488e0a96a6a531c9ef26c31ad763b7f858b278657051be31d.exe
2892	41f341ae994cf53488e0a96a6a531c9ef26c31ad763b7f858b278657051be31d.exe
2892	41f341ae994cf53488e0a96a6a531c9ef26c31ad763b7f858b278657051be31d.exe
2680	AddInProcess32.exe
2680	AddInProcess32.exe

Suspicious behavior: MapViewOfSection 3 IoCs

pid	Process
2680	AddInProcess32.exe
2680	AddInProcess32.exe
2680	AddInProcess32.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2892	41f341ae994cf53488e0a96a6a531c9ef26c31ad763b7f858b278657051be31d.exe
Token: SeDebugPrivilege	2680	AddInProcess32.exe
Token: SeShutdownPrivilege	1252	Explorer.EXE
Token: SeShutdownPrivilege	1252	Explorer.EXE
Token: SeShutdownPrivilege	1252	Explorer.EXE

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2892 wrote to memory of 2680	2892	41f341ae994cf53488e0a96a6a531c9ef26c31ad763b7f858b278657051be31d.exe	31
PID 2892 wrote to memory of 2680	2892	41f341ae994cf53488e0a96a6a531c9ef26c31ad763b7f858b278657051be31d.exe	31
PID 2892 wrote to memory of 2680	2892	41f341ae994cf53488e0a96a6a531c9ef26c31ad763b7f858b278657051be31d.exe	31
PID 2892 wrote to memory of 2680	2892	41f341ae994cf53488e0a96a6a531c9ef26c31ad763b7f858b278657051be31d.exe	31
PID 2892 wrote to memory of 2680	2892	41f341ae994cf53488e0a96a6a531c9ef26c31ad763b7f858b278657051be31d.exe	31
PID 2892 wrote to memory of 2680	2892	41f341ae994cf53488e0a96a6a531c9ef26c31ad763b7f858b278657051be31d.exe	31
PID 2892 wrote to memory of 2680	2892	41f341ae994cf53488e0a96a6a531c9ef26c31ad763b7f858b278657051be31d.exe	31
PID 1252 wrote to memory of 2420	1252	Explorer.EXE	32
PID 1252 wrote to memory of 2420	1252	Explorer.EXE	32
PID 1252 wrote to memory of 2420	1252	Explorer.EXE	32
PID 1252 wrote to memory of 2420	1252	Explorer.EXE	32
PID 1252 wrote to memory of 2420	1252	Explorer.EXE	32
PID 1252 wrote to memory of 2420	1252	Explorer.EXE	32
PID 1252 wrote to memory of 2420	1252	Explorer.EXE	32
PID 2420 wrote to memory of 1528	2420	msiexec.exe	33
PID 2420 wrote to memory of 1528	2420	msiexec.exe	33
PID 2420 wrote to memory of 1528	2420	msiexec.exe	33
PID 2420 wrote to memory of 1528	2420	msiexec.exe	33

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1252
- C:\Users\Admin\AppData\Local\Temp\41f341ae994cf53488e0a96a6a531c9ef26c31ad763b7f858b278657051be31d.exe
  "C:\Users\Admin\AppData\Local\Temp\41f341ae994cf53488e0a96a6a531c9ef26c31ad763b7f858b278657051be31d.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2892
- - C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe
    "C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2680
- C:\Windows\SysWOW64\msiexec.exe
  "C:\Windows\SysWOW64\msiexec.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2420
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2420 -s 268
    3⤵
    - Program crash
    PID:1528

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\AddInProcess32.exe

Filesize
41KB

MD5
6a673bfc3b67ae9782cb31af2f234c68

SHA1
7544e89566d91e84e3cd437b9a073e5f6b56566e

SHA256
978a4093058aa2ebf05dc353897d90d950324389879b57741b64160825b5ec0e

SHA512
72c302372ce87ceda2a3c70a6005d3f9c112f1641bc7fe6824c718971233e66c07e2996d2785fa358566c38714c25ea812c05c7cfd2f588284849d495fd24f39

Download Submit
memory/1252-31-0x0000000004E90000-0x0000000004FDE000-memory.dmp

Filesize
1.3MB

Download
memory/1252-24-0x0000000004E90000-0x0000000004FDE000-memory.dmp

Filesize
1.3MB

Download
memory/2420-28-0x00000000000A0000-0x00000000000B4000-memory.dmp

Filesize
80KB

Download
memory/2420-25-0x00000000000A0000-0x00000000000B4000-memory.dmp

Filesize
80KB

Download
memory/2420-26-0x00000000000A0000-0x00000000000B4000-memory.dmp

Filesize
80KB

Download
memory/2680-20-0x0000000000860000-0x0000000000B63000-memory.dmp

Filesize
3.0MB

Download
memory/2680-17-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/2680-23-0x00000000002A0000-0x00000000002B4000-memory.dmp

Filesize
80KB

Download
memory/2680-22-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/2680-13-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/2680-14-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/2680-15-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2892-0-0x000000007489E000-0x000000007489F000-memory.dmp

Filesize
4KB

Download
memory/2892-19-0x0000000074890000-0x0000000074F7E000-memory.dmp

Filesize
6.9MB

Download
memory/2892-8-0x000000007489E000-0x000000007489F000-memory.dmp

Filesize
4KB

Download
memory/2892-5-0x0000000000430000-0x0000000000438000-memory.dmp

Filesize
32KB

Download
memory/2892-9-0x0000000074890000-0x0000000074F7E000-memory.dmp

Filesize
6.9MB

Download
memory/2892-6-0x0000000074890000-0x0000000074F7E000-memory.dmp

Filesize
6.9MB

Download
memory/2892-4-0x00000000003E0000-0x00000000003E8000-memory.dmp

Filesize
32KB

Download
memory/2892-3-0x0000000000300000-0x0000000000308000-memory.dmp

Filesize
32KB

Download
memory/2892-2-0x00000000002E0000-0x00000000002F4000-memory.dmp

Filesize
80KB

Download
memory/2892-1-0x0000000000B90000-0x0000000000C1A000-memory.dmp

Filesize
552KB

Download

Analysis

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