formbook | dfb9a75bd82bcf0d9f72647affdf954d936d629eb3be78fe4b5c9b5166ccb9d6

General

Target

tmp.exe
Size

88KB
MD5

eebdd5b69b2fbe296a4e848b6ece83e7
SHA1

a416b80860c5810aa92c72382eb34c29a36ad34a
SHA256

dfb9a75bd82bcf0d9f72647affdf954d936d629eb3be78fe4b5c9b5166ccb9d6
SHA512

b3d4a1cde995d12e16367fd0437a0fcd2bf52081aba40eace547e79838d17de40bb5162112132d3d1c49f7baf9a4c1581a8c4f696df64b4321c6f7cd27245afa
SSDEEP

1536:LgBV6YZ3juIBFXJpk+CfZxtLOgiC2fjYYYYYYfpQpQpQpPd49N7H:UBV6KTBBFXJpk+CfZHLO1zfzpQpQpQp+

Score

10^/10

formbook purecrypter ar73 downloader loader rat spyware stealer trojan

Malware Config

Extracted

Family

purecrypter

C2

http://192.3.215.60/uo7/Cbqta.png

Extracted

Family

formbook

Version

4.1

Campaign

ar73

Decoy

classgorilla.com

b6817.com

1wwuwa.top

dgslimited.africa

deepwaterships.com

hkshshoptw.shop

hurricanevalleyatvjamboree.com

ckpconsulting.com

laojiangmath.com

authenticityhacking.com

family-doctor-53205.com

investinstgeorgeut.com

lithoearthsolution.africa

quickhealcareltd.co.uk

delightkgrillw.top

freezeclosettoilet.com

coo1star.com

gemgamut.com

enrichednetworksolutions.com

betterbeeclean.com

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
PureCrypter
PureCrypter is a .NET malware loader first seen in early 2021.
loader downloader purecrypter

Formbook payload 5 IoCs

rat

resource	yara_rule
behavioral1/memory/1596-70-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/1596-74-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/1596-81-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/888-83-0x00000000000C0000-0x00000000000EF000-memory.dmp	formbook
behavioral1/memory/888-85-0x00000000000C0000-0x00000000000EF000-memory.dmp	formbook

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 1212 set thread context of 1596	1212	tmp.exe	30
PID 1596 set thread context of 1260	1596	MSBuild.exe	16
PID 1596 set thread context of 1260	1596	MSBuild.exe	16
PID 888 set thread context of 1260	888	mstsc.exe	16

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 23 IoCs

pid	Process
1664	powershell.exe
1596	MSBuild.exe
1596	MSBuild.exe
1596	MSBuild.exe
888	mstsc.exe
888	mstsc.exe
888	mstsc.exe
888	mstsc.exe
888	mstsc.exe
888	mstsc.exe
888	mstsc.exe
888	mstsc.exe
888	mstsc.exe
888	mstsc.exe
888	mstsc.exe
888	mstsc.exe
888	mstsc.exe
888	mstsc.exe
888	mstsc.exe
888	mstsc.exe
888	mstsc.exe
888	mstsc.exe
888	mstsc.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1260	Explorer.EXE

Suspicious behavior: MapViewOfSection 6 IoCs

pid	Process
1596	MSBuild.exe
1596	MSBuild.exe
1596	MSBuild.exe
1596	MSBuild.exe
888	mstsc.exe
888	mstsc.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1212	tmp.exe
Token: SeDebugPrivilege	1664	powershell.exe
Token: SeDebugPrivilege	1596	MSBuild.exe
Token: SeDebugPrivilege	888	mstsc.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1212 wrote to memory of 1664	1212	tmp.exe	28
PID 1212 wrote to memory of 1664	1212	tmp.exe	28
PID 1212 wrote to memory of 1664	1212	tmp.exe	28
PID 1212 wrote to memory of 1664	1212	tmp.exe	28
PID 1212 wrote to memory of 1596	1212	tmp.exe	30
PID 1212 wrote to memory of 1596	1212	tmp.exe	30
PID 1212 wrote to memory of 1596	1212	tmp.exe	30
PID 1212 wrote to memory of 1596	1212	tmp.exe	30
PID 1212 wrote to memory of 1596	1212	tmp.exe	30
PID 1212 wrote to memory of 1596	1212	tmp.exe	30
PID 1212 wrote to memory of 1596	1212	tmp.exe	30
PID 1260 wrote to memory of 888	1260	Explorer.EXE	31
PID 1260 wrote to memory of 888	1260	Explorer.EXE	31
PID 1260 wrote to memory of 888	1260	Explorer.EXE	31
PID 1260 wrote to memory of 888	1260	Explorer.EXE	31
PID 888 wrote to memory of 1532	888	mstsc.exe	32
PID 888 wrote to memory of 1532	888	mstsc.exe	32
PID 888 wrote to memory of 1532	888	mstsc.exe	32
PID 888 wrote to memory of 1532	888	mstsc.exe	32

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:1260
- C:\Users\Admin\AppData\Local\Temp\tmp.exe
  "C:\Users\Admin\AppData\Local\Temp\tmp.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1212
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1664
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:1596
- C:\Windows\SysWOW64\mstsc.exe
  "C:\Windows\SysWOW64\mstsc.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:888
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
    3⤵
    PID:1532

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/888-82-0x0000000000890000-0x0000000000994000-memory.dmp

Filesize
1.0MB

Download
memory/888-84-0x0000000002070000-0x0000000002373000-memory.dmp

Filesize
3.0MB

Download
memory/888-80-0x0000000000890000-0x0000000000994000-memory.dmp

Filesize
1.0MB

Download
memory/888-83-0x00000000000C0000-0x00000000000EF000-memory.dmp

Filesize
188KB

Download
memory/888-87-0x0000000001EC0000-0x0000000001F53000-memory.dmp

Filesize
588KB

Download
memory/888-85-0x00000000000C0000-0x00000000000EF000-memory.dmp

Filesize
188KB

Download
memory/1212-55-0x0000000004E80000-0x0000000004EC0000-memory.dmp

Filesize
256KB

Download
memory/1212-62-0x0000000004E80000-0x0000000004EC0000-memory.dmp

Filesize
256KB

Download
memory/1212-57-0x0000000005B70000-0x0000000005C02000-memory.dmp

Filesize
584KB

Download
memory/1212-56-0x0000000006450000-0x00000000065D2000-memory.dmp

Filesize
1.5MB

Download
memory/1212-54-0x00000000008F0000-0x000000000090C000-memory.dmp

Filesize
112KB

Download
memory/1260-92-0x00000000064B0000-0x000000000657E000-memory.dmp

Filesize
824KB

Download
memory/1260-89-0x00000000064B0000-0x000000000657E000-memory.dmp

Filesize
824KB

Download
memory/1260-88-0x00000000064B0000-0x000000000657E000-memory.dmp

Filesize
824KB

Download
memory/1260-76-0x0000000006AF0000-0x0000000006C1E000-memory.dmp

Filesize
1.2MB

Download
memory/1260-79-0x0000000007070000-0x000000000719D000-memory.dmp

Filesize
1.2MB

Download
memory/1596-73-0x0000000000A40000-0x0000000000D43000-memory.dmp

Filesize
3.0MB

Download
memory/1596-75-0x0000000000190000-0x00000000001A4000-memory.dmp

Filesize
80KB

Download
memory/1596-78-0x0000000000220000-0x0000000000234000-memory.dmp

Filesize
80KB

Download
memory/1596-74-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1596-81-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1596-70-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1596-69-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/1596-68-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1596-67-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1664-65-0x00000000023F0000-0x0000000002430000-memory.dmp

Filesize
256KB

Download
memory/1664-63-0x00000000023F0000-0x0000000002430000-memory.dmp

Filesize
256KB

Download
memory/1664-64-0x00000000023F0000-0x0000000002430000-memory.dmp

Filesize
256KB

Download
memory/1664-60-0x00000000023F0000-0x0000000002430000-memory.dmp

Filesize
256KB

Download
memory/1664-61-0x00000000023F0000-0x0000000002430000-memory.dmp

Filesize
256KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads