formbook | 9ffd8f5cd26f82289e8f54da8894460401044c0e8506a97a016bda281458d732

General

Target

yzoczjnuz.exe
Size

59KB
MD5

60ebe600e2d67c0877426dfd53be96d7
SHA1

83c0f3f77bec5df19f20ab0706ca736bd5e6e0d6
SHA256

fad978413cf6a36fbd03d3c96a5a08d0cf227e17710abddc06e73ae1913de648
SHA512

f0e2839211d84f2247a654f51ff07fe4c89f3d9ed71558e34479d8afe08aa9f606a65d1e53eaa0bea8287537de8f7e50427402f33a0339739b4dff7405a127eb
SSDEEP

1536:WgvtLu0ZssXg2J2m3K5n2ETMCZQsuyXn5QnQC:WACsPEvMCi32nCnQC

Score

10^/10

formbook avcn discovery rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Campaign

avcn

Decoy

iQqc+b5jHA+W

gCI4O82LSsNA9tLkneHk6qA=

3I2qv1ZVYff+1Eo=

1YmmfbWjsiHmYcYjSVTf

NBsHMXP19khOJt2KMTEHhw==

phGkJ+uyWGow/gNhAcfxpNU4GLuUgXFcOg==

76S4kOajAII72kw=

YuoJB0X0+/LJtxIjSVTf

dfwI3SsaGogqBAZ4xhUx4B2g+LiF8XoFNA==

DPZ6AvfogdqUiZUq5K+3Jqk=

hnICZyINthreqpPpaLz9gQ==

yVh1ZpxISCr6h8b+MA==

/8Tg3VE+R7A/Bte6oC7kz/g4mz8Ufa4=

Nb5SuHlc+kxwGO5Oig5THgechA==

/NLWvgr7IAXcxzuueX/s6wJXODEI

/niFcKdVbQHAqH2y

Gac4n4YyRhvRYuK6

RtRr4pSUsjjOu7qsuv9FFBTuiHQ=

u1p5bblp59M=

qmh/ZV4PTj/IiNezISd2YeWw

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-1-5-21-2703099537-420551529-3771253338-1000\Control Panel\International\Geo\Nation	yzoczjnuz.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2084 set thread context of 1212	2084	yzoczjnuz.exe	30
PID 1212 set thread context of 1424	1212	yzoczjnuz.exe	21
PID 880 set thread context of 1424	880	wscript.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	yzoczjnuz.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wscript.exe

Suspicious behavior: EnumeratesProcesses 33 IoCs

pid	Process
1212	yzoczjnuz.exe
1212	yzoczjnuz.exe
1212	yzoczjnuz.exe
1212	yzoczjnuz.exe
880	wscript.exe
880	wscript.exe
880	wscript.exe
880	wscript.exe
880	wscript.exe
880	wscript.exe
880	wscript.exe
880	wscript.exe
880	wscript.exe
880	wscript.exe
880	wscript.exe
880	wscript.exe
880	wscript.exe
880	wscript.exe
880	wscript.exe
880	wscript.exe
880	wscript.exe
880	wscript.exe
880	wscript.exe
880	wscript.exe
880	wscript.exe
880	wscript.exe
880	wscript.exe
880	wscript.exe
880	wscript.exe
880	wscript.exe
880	wscript.exe
880	wscript.exe
880	wscript.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
1212	yzoczjnuz.exe
1212	yzoczjnuz.exe
1212	yzoczjnuz.exe
880	wscript.exe
880	wscript.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1212	yzoczjnuz.exe
Token: SeDebugPrivilege	880	wscript.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2084 wrote to memory of 1212	2084	yzoczjnuz.exe	30
PID 2084 wrote to memory of 1212	2084	yzoczjnuz.exe	30
PID 2084 wrote to memory of 1212	2084	yzoczjnuz.exe	30
PID 2084 wrote to memory of 1212	2084	yzoczjnuz.exe	30
PID 2084 wrote to memory of 1212	2084	yzoczjnuz.exe	30
PID 1424 wrote to memory of 880	1424	Explorer.EXE	31
PID 1424 wrote to memory of 880	1424	Explorer.EXE	31
PID 1424 wrote to memory of 880	1424	Explorer.EXE	31
PID 1424 wrote to memory of 880	1424	Explorer.EXE	31

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1424
- C:\Users\Admin\AppData\Local\Temp\yzoczjnuz.exe
  "C:\Users\Admin\AppData\Local\Temp\yzoczjnuz.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2084
- - C:\Users\Admin\AppData\Local\Temp\yzoczjnuz.exe
    "C:\Users\Admin\AppData\Local\Temp\yzoczjnuz.exe"
    3⤵
    - Checks computer location settings
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:1212
- C:\Windows\SysWOW64\wscript.exe
  "C:\Windows\SysWOW64\wscript.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  PID:880

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/880-7-0x0000000000180000-0x00000000001A6000-memory.dmp

Filesize
152KB

Download
memory/880-10-0x0000000000180000-0x00000000001A6000-memory.dmp

Filesize
152KB

Download
memory/880-11-0x0000000000070000-0x000000000009D000-memory.dmp

Filesize
180KB

Download
memory/1212-2-0x0000000000401000-0x000000000042F000-memory.dmp

Filesize
184KB

Download
memory/1212-3-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1212-4-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1212-8-0x0000000000401000-0x000000000042F000-memory.dmp

Filesize
184KB

Download
memory/1424-5-0x0000000007DA0000-0x0000000007ED3000-memory.dmp

Filesize
1.2MB

Download
memory/1424-12-0x0000000007DA0000-0x0000000007ED3000-memory.dmp

Filesize
1.2MB

Download
memory/2084-0-0x0000000000230000-0x0000000000232000-memory.dmp

Filesize
8KB

Download

Analysis

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