formbook | 256ddf8556d759c829d9ebfb85e2ec242b3bf94d38f2cbf9edfb5c780973a256

General

Target

Halkbank,doc 00100210210.exe
Size

270KB
MD5

4744495f286ed57aee218fe035b6d8b5
SHA1

f90d47ed2f471017c913c6e6d5924f38d9a6673c
SHA256

b03f6bc5eec0f24076b3ef2c761b21d75c489ad34c5f94dcffab6d2b4d65263f
SHA512

c9b78c243895fdd30a673b045b6b2b5ca0d552490d4c0c005c583ccaa03c42d54df3a7b2e978f169dc9009ff651ea1a4eb8130a9335879c45b95d02f6153e037

Score

10^/10

formbook rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

C2

http://www.magnumopuspro.com/nyr/

Decoy

anemone-vintage.com

ironcitytools.com

joshandmatthew.com

breathtakingscenery.photos

karabakh-terror.com

micahelgall.com

entretiendesterrasses.com

mhgholdings.com

blewm.com

sidewalknotary.com

ytrs-elec.com

danhpham.com

ma21cle2henz.xyz

lotusforlease.com

shipleyphotoandfilm.com

bulktool.xyz

ouedzmala.com

yichengvpr.com

connectmygames.com

chjcsc.com

Signatures

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

Formbook Payload 2 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1772-64-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral1/memory/1608-72-0x0000000000090000-0x00000000000BE000-memory.dmp	formbook

Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

740 cmd.exe
Loads dropped DLL 1 IoCs

Processes:

Halkbank,doc 00100210210.exe

pid process

1996 Halkbank,doc 00100210210.exe

pid	process
740	cmd.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

Halkbank,doc 00100210210.exeHalkbank,doc 00100210210.execmstp.exe

description	pid	process	target process
PID 1996 set thread context of 1772	1996	Halkbank,doc 00100210210.exe	Halkbank,doc 00100210210.exe
PID 1772 set thread context of 1220	1772	Halkbank,doc 00100210210.exe	Explorer.EXE
PID 1608 set thread context of 1220	1608	cmstp.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 31 IoCs

Processes:

Halkbank,doc 00100210210.execmstp.exe

pid	process
1772	Halkbank,doc 00100210210.exe
1772	Halkbank,doc 00100210210.exe
1608	cmstp.exe
1608	cmstp.exe
1608	cmstp.exe
1608	cmstp.exe
1608	cmstp.exe
1608	cmstp.exe
1608	cmstp.exe
1608	cmstp.exe
1608	cmstp.exe
1608	cmstp.exe
1608	cmstp.exe
1608	cmstp.exe
1608	cmstp.exe
1608	cmstp.exe
1608	cmstp.exe
1608	cmstp.exe
1608	cmstp.exe
1608	cmstp.exe
1608	cmstp.exe
1608	cmstp.exe
1608	cmstp.exe
1608	cmstp.exe
1608	cmstp.exe
1608	cmstp.exe
1608	cmstp.exe
1608	cmstp.exe
1608	cmstp.exe
1608	cmstp.exe
1608	cmstp.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

1220 Explorer.EXE

pid	process
1220	Explorer.EXE

Suspicious behavior: MapViewOfSection 6 IoCs

Processes:

Halkbank,doc 00100210210.exeHalkbank,doc 00100210210.execmstp.exe

pid	process
1996	Halkbank,doc 00100210210.exe
1772	Halkbank,doc 00100210210.exe
1772	Halkbank,doc 00100210210.exe
1772	Halkbank,doc 00100210210.exe
1608	cmstp.exe
1608	cmstp.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Halkbank,doc 00100210210.execmstp.exe

description pid process

Token: SeDebugPrivilege 1772 Halkbank,doc 00100210210.exe
Token: SeDebugPrivilege 1608 cmstp.exe
Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

Explorer.EXE

pid process

1220 Explorer.EXE
1220 Explorer.EXE
1220 Explorer.EXE
1220 Explorer.EXE
Suspicious use of SendNotifyMessage 4 IoCs

Processes:

Explorer.EXE

pid process

1220 Explorer.EXE
1220 Explorer.EXE
1220 Explorer.EXE
1220 Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	1772	Halkbank,doc 00100210210.exe
Token: SeDebugPrivilege	1608	cmstp.exe

pid	process
1220	Explorer.EXE
1220	Explorer.EXE
1220	Explorer.EXE
1220	Explorer.EXE

pid	process
1220	Explorer.EXE
1220	Explorer.EXE
1220	Explorer.EXE
1220	Explorer.EXE

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

Halkbank,doc 00100210210.exeExplorer.EXEcmstp.exe

description	pid	process	target process
PID 1996 wrote to memory of 1772	1996	Halkbank,doc 00100210210.exe	Halkbank,doc 00100210210.exe
PID 1996 wrote to memory of 1772	1996	Halkbank,doc 00100210210.exe	Halkbank,doc 00100210210.exe
PID 1996 wrote to memory of 1772	1996	Halkbank,doc 00100210210.exe	Halkbank,doc 00100210210.exe
PID 1996 wrote to memory of 1772	1996	Halkbank,doc 00100210210.exe	Halkbank,doc 00100210210.exe
PID 1996 wrote to memory of 1772	1996	Halkbank,doc 00100210210.exe	Halkbank,doc 00100210210.exe
PID 1220 wrote to memory of 1608	1220	Explorer.EXE	cmstp.exe
PID 1220 wrote to memory of 1608	1220	Explorer.EXE	cmstp.exe
PID 1220 wrote to memory of 1608	1220	Explorer.EXE	cmstp.exe
PID 1220 wrote to memory of 1608	1220	Explorer.EXE	cmstp.exe
PID 1220 wrote to memory of 1608	1220	Explorer.EXE	cmstp.exe
PID 1220 wrote to memory of 1608	1220	Explorer.EXE	cmstp.exe
PID 1220 wrote to memory of 1608	1220	Explorer.EXE	cmstp.exe
PID 1608 wrote to memory of 740	1608	cmstp.exe	cmd.exe
PID 1608 wrote to memory of 740	1608	cmstp.exe	cmd.exe
PID 1608 wrote to memory of 740	1608	cmstp.exe	cmd.exe
PID 1608 wrote to memory of 740	1608	cmstp.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1220

C:\Users\Admin\AppData\Local\Temp\Halkbank,doc 00100210210.exe
"C:\Users\Admin\AppData\Local\Temp\Halkbank,doc 00100210210.exe"
2⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1996

C:\Users\Admin\AppData\Local\Temp\Halkbank,doc 00100210210.exe
"C:\Users\Admin\AppData\Local\Temp\Halkbank,doc 00100210210.exe"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1772

C:\Windows\SysWOW64\autoconv.exe
"C:\Windows\SysWOW64\autoconv.exe"
2⤵
PID:1756

C:\Windows\SysWOW64\autoconv.exe
"C:\Windows\SysWOW64\autoconv.exe"
2⤵
PID:1068

C:\Windows\SysWOW64\autoconv.exe
"C:\Windows\SysWOW64\autoconv.exe"
2⤵
PID:528

C:\Windows\SysWOW64\autoconv.exe
"C:\Windows\SysWOW64\autoconv.exe"
2⤵
PID:1304

C:\Windows\SysWOW64\autoconv.exe
"C:\Windows\SysWOW64\autoconv.exe"
2⤵
PID:800

C:\Windows\SysWOW64\cmstp.exe
"C:\Windows\SysWOW64\cmstp.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1608

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\Halkbank,doc 00100210210.exe"
3⤵
- Deletes itself
PID:740

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

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Downloads

\Users\Admin\AppData\Local\Temp\nss4B4.tmp\c4y3gc.dll
MD5
127cb178b9b88a44d8dd4c0f4d37d723

SHA1
eebbe7fa1f97fb99ed8b9e22b5bab8b2838c0e86

SHA256
b8f809ad68b284ad6039143935ffc90a3cd4c6a71a9eca77eef981e83a4c89b2

SHA512
b6b02bae72fc9103d35238e2380f7213038cbcb7472f55b032b963993d8b9306f97651675796e3082360b42e717ae7d4aa5694c750cf0e9b18edbb3ff94415ad

Download Submit
memory/740-70-0x0000000000000000-mapping.dmp

Download
memory/1220-67-0x00000000071C0000-0x0000000007307000-memory.dmp

Filesize
1.3MB

Download
memory/1220-75-0x0000000004FA0000-0x00000000050A3000-memory.dmp

Filesize
1.0MB

Download
memory/1608-71-0x00000000007C0000-0x00000000007D8000-memory.dmp

Filesize
96KB

Download
memory/1608-68-0x0000000000000000-mapping.dmp

Download
memory/1608-72-0x0000000000090000-0x00000000000BE000-memory.dmp

Filesize
184KB

Download
memory/1608-73-0x0000000001F00000-0x0000000002203000-memory.dmp

Filesize
3.0MB

Download
memory/1608-74-0x0000000001D70000-0x0000000001E03000-memory.dmp

Filesize
588KB

Download
memory/1772-64-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/1772-65-0x0000000000850000-0x0000000000B53000-memory.dmp

Filesize
3.0MB

Download
memory/1772-66-0x00000000002C0000-0x00000000002D4000-memory.dmp

Filesize
80KB

Download
memory/1772-61-0x000000000041EBA0-mapping.dmp

Download
memory/1996-63-0x0000000002901000-0x0000000002903000-memory.dmp

Filesize
8KB

Download
memory/1996-62-0x0000000002900000-0x0000000002901000-memory.dmp

Filesize
4KB

Download
memory/1996-59-0x0000000075D41000-0x0000000075D43000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads