formbook | 3cfd81b824673a6ba23d472bd09d5e7610a3346cce6f23956507af5eab63c012

General

Target

tmp.exe
Size

257KB
MD5

db34b27822c1c7d80e7e59ed743ce22c
SHA1

f888efab5bfd957947b95877b4c5c73067dad197
SHA256

3cfd81b824673a6ba23d472bd09d5e7610a3346cce6f23956507af5eab63c012
SHA512

860a92c61d02b1429853c529234ca0885cc37065503a14918ddfd722fd3281f1179fa036315a867eb36475e93db391307255e214b78733d8fd4ce7c93ed7a066
SSDEEP

6144:QBn1+chufZq/1wTiFDMwMBUvosOPuoXK+qvcAYzy/:g+ciAyeUavOha+nAYI

Score

10^/10

formbook pr28 rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

pr28

Decoy

huaxinimg.com

baorungas.com

comercializadoramultimus.com

blr-batipro.com

wantagedfas.uk

1thingplan.one

cweilin.com

lorienconsultingllc.com

jdzsjwx.com

casafacil.site

hkacgt.com

hasid.africa

92dgr97k4hr9.com

cvbiop.xyz

1wbskm.top

fantasticmobility.com

goodchoice2022.com

hafizpower.com

familiajoya.com

fundscrahelp.info

Signatures

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

Formbook payload 4 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1768-65-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/1768-71-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/1620-75-0x0000000000080000-0x00000000000AF000-memory.dmp	formbook
behavioral1/memory/1620-79-0x0000000000080000-0x00000000000AF000-memory.dmp	formbook

Executes dropped EXE 2 IoCs

Processes:

rzjxgj.exerzjxgj.exe

pid process

2036 rzjxgj.exe
1768 rzjxgj.exe
Loads dropped DLL 2 IoCs

Processes:

tmp.exerzjxgj.exe

pid process

1156 tmp.exe
2036 rzjxgj.exe

pid	process
2036	rzjxgj.exe
1768	rzjxgj.exe

pid	process
1156	tmp.exe
2036	rzjxgj.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

rzjxgj.exerzjxgj.execmd.exe

description	pid	process	target process
PID 2036 set thread context of 1768	2036	rzjxgj.exe	rzjxgj.exe
PID 1768 set thread context of 1252	1768	rzjxgj.exe	Explorer.EXE
PID 1768 set thread context of 1252	1768	rzjxgj.exe	Explorer.EXE
PID 1620 set thread context of 1252	1620	cmd.exe	Explorer.EXE

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 22 IoCs

Processes:

rzjxgj.execmd.exe

pid	process
1768	rzjxgj.exe
1768	rzjxgj.exe
1768	rzjxgj.exe
1620	cmd.exe
1620	cmd.exe
1620	cmd.exe
1620	cmd.exe
1620	cmd.exe
1620	cmd.exe
1620	cmd.exe
1620	cmd.exe
1620	cmd.exe
1620	cmd.exe
1620	cmd.exe
1620	cmd.exe
1620	cmd.exe
1620	cmd.exe
1620	cmd.exe
1620	cmd.exe
1620	cmd.exe
1620	cmd.exe
1620	cmd.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

1252 Explorer.EXE
Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

rzjxgj.exerzjxgj.execmd.exe

pid process

2036 rzjxgj.exe
1768 rzjxgj.exe
1768 rzjxgj.exe
1768 rzjxgj.exe
1768 rzjxgj.exe
1620 cmd.exe
1620 cmd.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

rzjxgj.execmd.exe

description pid process

Token: SeDebugPrivilege 1768 rzjxgj.exe
Token: SeDebugPrivilege 1620 cmd.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1252 Explorer.EXE
1252 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1252 Explorer.EXE
1252 Explorer.EXE

pid	process
1252	Explorer.EXE

pid	process
2036	rzjxgj.exe
1768	rzjxgj.exe
1768	rzjxgj.exe
1768	rzjxgj.exe
1768	rzjxgj.exe
1620	cmd.exe
1620	cmd.exe

description	pid	process
Token: SeDebugPrivilege	1768	rzjxgj.exe
Token: SeDebugPrivilege	1620	cmd.exe

pid	process
1252	Explorer.EXE
1252	Explorer.EXE

pid	process
1252	Explorer.EXE
1252	Explorer.EXE

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

tmp.exerzjxgj.exerzjxgj.execmd.exe

description	pid	process	target process
PID 1156 wrote to memory of 2036	1156	tmp.exe	rzjxgj.exe
PID 1156 wrote to memory of 2036	1156	tmp.exe	rzjxgj.exe
PID 1156 wrote to memory of 2036	1156	tmp.exe	rzjxgj.exe
PID 1156 wrote to memory of 2036	1156	tmp.exe	rzjxgj.exe
PID 2036 wrote to memory of 1768	2036	rzjxgj.exe	rzjxgj.exe
PID 2036 wrote to memory of 1768	2036	rzjxgj.exe	rzjxgj.exe
PID 2036 wrote to memory of 1768	2036	rzjxgj.exe	rzjxgj.exe
PID 2036 wrote to memory of 1768	2036	rzjxgj.exe	rzjxgj.exe
PID 2036 wrote to memory of 1768	2036	rzjxgj.exe	rzjxgj.exe
PID 1768 wrote to memory of 1620	1768	rzjxgj.exe	cmd.exe
PID 1768 wrote to memory of 1620	1768	rzjxgj.exe	cmd.exe
PID 1768 wrote to memory of 1620	1768	rzjxgj.exe	cmd.exe
PID 1768 wrote to memory of 1620	1768	rzjxgj.exe	cmd.exe
PID 1620 wrote to memory of 888	1620	cmd.exe	cmd.exe
PID 1620 wrote to memory of 888	1620	cmd.exe	cmd.exe
PID 1620 wrote to memory of 888	1620	cmd.exe	cmd.exe
PID 1620 wrote to memory of 888	1620	cmd.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:1252

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
2⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1156

C:\Users\Admin\AppData\Local\Temp\rzjxgj.exe
"C:\Users\Admin\AppData\Local\Temp\rzjxgj.exe" C:\Users\Admin\AppData\Local\Temp\okwqyzbx.uc
3⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2036

C:\Users\Admin\AppData\Local\Temp\rzjxgj.exe
"C:\Users\Admin\AppData\Local\Temp\rzjxgj.exe"
4⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1768

C:\Windows\SysWOW64\autoconv.exe
"C:\Windows\SysWOW64\autoconv.exe"
5⤵
PID:1532

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\SysWOW64\cmd.exe"
5⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1620

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\rzjxgj.exe"
6⤵
PID:888

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\jbenz.m
Filesize
185KB

MD5
4b4ce519a534f3436dbbc48d123b6e83

SHA1
d10796875fffdebd65a4fec5de8dda497d2fc981

SHA256
552b1709acc1df6fed2544cad9f85c7f715c8c7e1e48c94c6ee6607b24a1b114

SHA512
b8f38ee58c66bd4b982d26aba7ec7967cd0a96a9b58c7661ffe1835c0b9f2f4c55d1484c2a79ed67eed23cc412607bfb9f77bfc4276727d94fecf917aacd7225

Download Submit
C:\Users\Admin\AppData\Local\Temp\okwqyzbx.uc
Filesize
5KB

MD5
e22f33b90450537ae0e9df382a3c87d2

SHA1
876eacd3ee12b0223c6c0564371f0e49ce5e5f29

SHA256
b9e9dcefcabf28d10c0a5cc8225b17444567e77a52bfd5b32f8f33a314129fc8

SHA512
16f3130d76b6df093022d6842e86136291bd7b28c87f8cd4ec8c903996b3823595f7df69d034f459b9cc26acff8d63c68dc002a7728bbeaf86a7892219a1ad14

Download Submit
C:\Users\Admin\AppData\Local\Temp\rzjxgj.exe
Filesize
104KB

MD5
9d249d3a0088dd3e3b7cdc0068bcb9dc

SHA1
1a3e0934278243d4e7c82f69f77271426c18d23d

SHA256
292de2987a1b943bbfec1025d9bb571a8c8aa59dd0662565147952f8a2d3dc06

SHA512
14c48fffcca018aa32a2f98ef793b28084c1691d78aa7cd2de88f7f568a2b3340920c8eef0372bccd7167a3edd333fa78cdb37ce48b62657a5cb975c8fa7a2a8

Download Submit
C:\Users\Admin\AppData\Local\Temp\rzjxgj.exe
Filesize
104KB

MD5
9d249d3a0088dd3e3b7cdc0068bcb9dc

SHA1
1a3e0934278243d4e7c82f69f77271426c18d23d

SHA256
292de2987a1b943bbfec1025d9bb571a8c8aa59dd0662565147952f8a2d3dc06

SHA512
14c48fffcca018aa32a2f98ef793b28084c1691d78aa7cd2de88f7f568a2b3340920c8eef0372bccd7167a3edd333fa78cdb37ce48b62657a5cb975c8fa7a2a8

Download Submit
C:\Users\Admin\AppData\Local\Temp\rzjxgj.exe
Filesize
104KB

MD5
9d249d3a0088dd3e3b7cdc0068bcb9dc

SHA1
1a3e0934278243d4e7c82f69f77271426c18d23d

SHA256
292de2987a1b943bbfec1025d9bb571a8c8aa59dd0662565147952f8a2d3dc06

SHA512
14c48fffcca018aa32a2f98ef793b28084c1691d78aa7cd2de88f7f568a2b3340920c8eef0372bccd7167a3edd333fa78cdb37ce48b62657a5cb975c8fa7a2a8

Download Submit
\Users\Admin\AppData\Local\Temp\rzjxgj.exe
Filesize
104KB

MD5
9d249d3a0088dd3e3b7cdc0068bcb9dc

SHA1
1a3e0934278243d4e7c82f69f77271426c18d23d

SHA256
292de2987a1b943bbfec1025d9bb571a8c8aa59dd0662565147952f8a2d3dc06

SHA512
14c48fffcca018aa32a2f98ef793b28084c1691d78aa7cd2de88f7f568a2b3340920c8eef0372bccd7167a3edd333fa78cdb37ce48b62657a5cb975c8fa7a2a8

Download Submit
\Users\Admin\AppData\Local\Temp\rzjxgj.exe
Filesize
104KB

MD5
9d249d3a0088dd3e3b7cdc0068bcb9dc

SHA1
1a3e0934278243d4e7c82f69f77271426c18d23d

SHA256
292de2987a1b943bbfec1025d9bb571a8c8aa59dd0662565147952f8a2d3dc06

SHA512
14c48fffcca018aa32a2f98ef793b28084c1691d78aa7cd2de88f7f568a2b3340920c8eef0372bccd7167a3edd333fa78cdb37ce48b62657a5cb975c8fa7a2a8

Download Submit
memory/888-73-0x0000000000000000-mapping.dmp

Download
memory/1156-54-0x0000000075E01000-0x0000000075E03000-memory.dmp

Filesize
8KB

Download
memory/1252-70-0x0000000006C10000-0x0000000006D08000-memory.dmp

Filesize
992KB

Download
memory/1252-80-0x00000000077D0000-0x000000000794E000-memory.dmp

Filesize
1.5MB

Download
memory/1252-78-0x00000000077D0000-0x000000000794E000-memory.dmp

Filesize
1.5MB

Download
memory/1252-68-0x0000000007130000-0x00000000072B7000-memory.dmp

Filesize
1.5MB

Download
memory/1620-75-0x0000000000080000-0x00000000000AF000-memory.dmp

Filesize
188KB

Download
memory/1620-72-0x0000000000000000-mapping.dmp

Download
memory/1620-74-0x000000004AAC0000-0x000000004AB0C000-memory.dmp

Filesize
304KB

Download
memory/1620-76-0x0000000002090000-0x0000000002393000-memory.dmp

Filesize
3.0MB

Download
memory/1620-77-0x0000000000470000-0x0000000000503000-memory.dmp

Filesize
588KB

Download
memory/1620-79-0x0000000000080000-0x00000000000AF000-memory.dmp

Filesize
188KB

Download
memory/1768-69-0x0000000000310000-0x0000000000324000-memory.dmp

Filesize
80KB

Download
memory/1768-67-0x00000000002C0000-0x00000000002D4000-memory.dmp

Filesize
80KB

Download
memory/1768-71-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1768-66-0x0000000000830000-0x0000000000B33000-memory.dmp

Filesize
3.0MB

Download
memory/1768-65-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1768-63-0x000000000041F120-mapping.dmp

Download
memory/2036-56-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

Loading Replay Monitor...

Downloads