formbook | 187fda2b830429934ff2d59c014f05098bfb323d639be258f075efa4309f5c0f

General

Target

xscfbjx.exe
Size

74KB
MD5

08b101029a510d1467056305f8bda101
SHA1

938d534e3584b132ece92f01e0089304b9587803
SHA256

3d897c1632a6234082cafef209af7ddb9f91a0af33b03e6d004e153a54d622c0
SHA512

631cc7c7a08b9492661983200ecc9b96c2d958d756808ed8b5b431a1a29ec92d360866c41c5d8307a3d185bcdedb4e66d661ec812d47d1ae057013a8cbc0ccbd
SSDEEP

1536:xjLDJzMtIyKhdKim2R44oQWUs5PRoMLEEpt8vTlJssWXcd5CM+ea:xmIyKhwxQWUs5PRoMLBylh5CMXa

Score

10^/10

formbook fkku discovery rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Campaign

fkku

Decoy

ItLUfbYmkw6ODl8lnvwkR/8=

oUKMUSjydqzVWxG/CqjK3ngAhQ==

HB9lfRtFwT/XlJ9Lxw==

hBYXuorq7a3WwPq1NSezCMStlQ==

ciRqfQbLgwx/+e2rLqTZ8oMLc2LYY4o=

9vb76Nc8JzKlj4YEQyPAx2dx86U=

fB9041xJgwl1

ND8juoNyH6x5XqlZ2Q==

QEaot04y8XLjFOBp1Cg=

SG6vmdmmpmFmDosczg==

WWCorUT756r1F+aD3cd7Cij6nSFQ

Yl63zVL2NnFph44XcKkiP/k=

s2RfFNOd3fuBEJNZ2ig=

u1p6Ucr2uCketwGD

0vD8lFkSfRCHEJdebbrb

qzlqgxrsrDRmDosczg==

H5aTYXc2rHXjzQ==

S/pFbexYx0S+Ex7SN5rC

9kOIkRTWkA136nA2Ua/R

ojOElJ50E1N40ZNanCbEZw==

Signatures

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Control Panel\International\Geo\Nation	xscfbjx.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 1852 set thread context of 2316	1852	xscfbjx.exe	30
PID 2316 set thread context of 1240	2316	xscfbjx.exe	21
PID 2316 set thread context of 1240	2316	xscfbjx.exe	21
PID 2132 set thread context of 1240	2132	raserver.exe	21

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	xscfbjx.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	raserver.exe

Suspicious behavior: EnumeratesProcesses 33 IoCs

pid	Process
2316	xscfbjx.exe
2316	xscfbjx.exe
2316	xscfbjx.exe
2316	xscfbjx.exe
2316	xscfbjx.exe
2132	raserver.exe
2132	raserver.exe
2132	raserver.exe
2132	raserver.exe
2132	raserver.exe
2132	raserver.exe
2132	raserver.exe
2132	raserver.exe
2132	raserver.exe
2132	raserver.exe
2132	raserver.exe
2132	raserver.exe
2132	raserver.exe
2132	raserver.exe
2132	raserver.exe
2132	raserver.exe
2132	raserver.exe
2132	raserver.exe
2132	raserver.exe
2132	raserver.exe
2132	raserver.exe
2132	raserver.exe
2132	raserver.exe
2132	raserver.exe
2132	raserver.exe
2132	raserver.exe
2132	raserver.exe
2132	raserver.exe

Suspicious behavior: MapViewOfSection 6 IoCs

pid	Process
2316	xscfbjx.exe
2316	xscfbjx.exe
2316	xscfbjx.exe
2316	xscfbjx.exe
2132	raserver.exe
2132	raserver.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2316	xscfbjx.exe
Token: SeDebugPrivilege	2132	raserver.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1852 wrote to memory of 2316	1852	xscfbjx.exe	30
PID 1852 wrote to memory of 2316	1852	xscfbjx.exe	30
PID 1852 wrote to memory of 2316	1852	xscfbjx.exe	30
PID 1852 wrote to memory of 2316	1852	xscfbjx.exe	30
PID 1852 wrote to memory of 2316	1852	xscfbjx.exe	30
PID 1240 wrote to memory of 2132	1240	Explorer.EXE	31
PID 1240 wrote to memory of 2132	1240	Explorer.EXE	31
PID 1240 wrote to memory of 2132	1240	Explorer.EXE	31
PID 1240 wrote to memory of 2132	1240	Explorer.EXE	31

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1240
- C:\Users\Admin\AppData\Local\Temp\xscfbjx.exe
  "C:\Users\Admin\AppData\Local\Temp\xscfbjx.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1852
- - C:\Users\Admin\AppData\Local\Temp\xscfbjx.exe
    "C:\Users\Admin\AppData\Local\Temp\xscfbjx.exe"
    3⤵
    - Checks computer location settings
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2316
- C:\Windows\SysWOW64\raserver.exe
  "C:\Windows\SysWOW64\raserver.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  PID:2132

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

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

memory/1240-10-0x0000000004F50000-0x0000000005068000-memory.dmp

Filesize
1.1MB

Download
memory/1240-17-0x0000000006B80000-0x0000000006D2D000-memory.dmp

Filesize
1.7MB

Download
memory/1240-5-0x0000000003970000-0x0000000003A70000-memory.dmp

Filesize
1024KB

Download
memory/1240-6-0x0000000004F50000-0x0000000005068000-memory.dmp

Filesize
1.1MB

Download
memory/1240-11-0x0000000006B80000-0x0000000006D2D000-memory.dmp

Filesize
1.7MB

Download
memory/1852-0-0x00000000000F0000-0x00000000000F2000-memory.dmp

Filesize
8KB

Download
memory/2132-16-0x0000000000080000-0x00000000000AD000-memory.dmp

Filesize
180KB

Download
memory/2132-15-0x00000000005C0000-0x00000000005DC000-memory.dmp

Filesize
112KB

Download
memory/2132-14-0x00000000005C0000-0x00000000005DC000-memory.dmp

Filesize
112KB

Download
memory/2316-7-0x0000000000401000-0x000000000042F000-memory.dmp

Filesize
184KB

Download
memory/2316-8-0x0000000000423000-0x0000000000424000-memory.dmp

Filesize
4KB

Download
memory/2316-9-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2316-13-0x0000000000401000-0x000000000042F000-memory.dmp

Filesize
184KB

Download
memory/2316-4-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2316-3-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2316-2-0x0000000000401000-0x000000000042F000-memory.dmp

Filesize
184KB

Download

Analysis

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