formbook | c43a9d3d87d5ce17e61de74587b9a1e4aa0250aae1fa6dde4e392e6de187b096

Analysis

max time kernel
149s
max time network
146s
platform
windows7_x64
resource
win7-20220414-en
submitted
22/04/2022, 00:32

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General

Target

vbc.exe
Size

446KB
MD5

71895780eaa4fe577e5d406cb84e150e
SHA1

e798fb18a9ddf2510cdbc536dd96144661ca8ea8
SHA256

c43a9d3d87d5ce17e61de74587b9a1e4aa0250aae1fa6dde4e392e6de187b096
SHA512

d78eeff6df29a1f3a6e2366746fbbf1fa58595ed3ddbf491d9e5bdb34aa060306b219c916ff4e39bb3c35a6a9f4700753515067d531bcc774f5303fa6b1ed3fd

Score

10^/10

formbook xloader a2c8 loader persistence rat spyware stealer suricata trojan

Malware Config

Extracted

Family

xloader

Version

2.5

Campaign

a2c8

Decoy

sethdukes.online

hustl-hk.com

alienspacebabes.com

yitongbag.com

adlichoob.com

wejust5.com

wwwsnapfinancial.com

patriotcapitalgroupllc.com

divaconnectionbuild.com

adventureventures.net

jaromer.net

closureservices.com

sdc-english.com

fleet-lab.com

gtgits.com

clinicaorion.com

deleaderainfluenceur.com

honghuamach.net

638661.com

sleepgenies.info

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
Xloader
Xloader is a rebranded version of Formbook malware.
loader xloader
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata

Xloader Payload 3 IoCs

rat

resource	yara_rule
behavioral1/memory/840-64-0x0000000000400000-0x0000000000429000-memory.dmp	xloader
behavioral1/memory/840-65-0x000000000041D3A0-mapping.dmp	xloader
behavioral1/memory/1756-73-0x0000000000080000-0x00000000000A9000-memory.dmp	xloader

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	NETSTAT.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\J8TP9PRXBFE = "C:\\Program Files (x86)\\Nljod5z\\certmgr7nmtbv.exe"	NETSTAT.EXE

Executes dropped EXE 3 IoCs

pid	Process
2040	pkqvhvquh.exe
840	pkqvhvquh.exe
1920	certmgr7nmtbv.exe

Loads dropped DLL 7 IoCs

pid	Process
1800	vbc.exe
1800	vbc.exe
2040	pkqvhvquh.exe
596	WerFault.exe
596	WerFault.exe
596	WerFault.exe
596	WerFault.exe

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows\CurrentVersion\Run\lfrlfiiuq = "C:\\Users\\Admin\\AppData\\Roaming\\ofhxtuqkrc\\mfmfycmde.exe"	pkqvhvquh.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2040 set thread context of 840	2040	pkqvhvquh.exe	29
PID 840 set thread context of 1424	840	pkqvhvquh.exe	14
PID 1756 set thread context of 1424	1756	NETSTAT.EXE	14

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Nljod5z\certmgr7nmtbv.exe	Explorer.EXE
File opened for modification	C:\Program Files (x86)\Nljod5z\certmgr7nmtbv.exe	NETSTAT.EXE

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
596	1920	WerFault.exe	35

Gathers network information 2 TTPs 1 IoCs

Uses commandline utility to view network configuration.

System Information Discovery

T1082

Command-Line Interface

T1059

pid	Process
1756	NETSTAT.EXE

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\Registry\User\S-1-5-21-1819626980-2277161760-1023733287-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	NETSTAT.EXE

Suspicious behavior: EnumeratesProcesses 26 IoCs

pid	Process
840	pkqvhvquh.exe
840	pkqvhvquh.exe
1756	NETSTAT.EXE
1756	NETSTAT.EXE
1756	NETSTAT.EXE
1756	NETSTAT.EXE
1756	NETSTAT.EXE
1756	NETSTAT.EXE
1756	NETSTAT.EXE
1756	NETSTAT.EXE
1756	NETSTAT.EXE
1756	NETSTAT.EXE
1756	NETSTAT.EXE
1756	NETSTAT.EXE
1756	NETSTAT.EXE
1756	NETSTAT.EXE
1756	NETSTAT.EXE
1756	NETSTAT.EXE
1756	NETSTAT.EXE
1756	NETSTAT.EXE
1756	NETSTAT.EXE
1756	NETSTAT.EXE
1756	NETSTAT.EXE
1756	NETSTAT.EXE
1756	NETSTAT.EXE
1756	NETSTAT.EXE

Suspicious behavior: MapViewOfSection 7 IoCs

pid	Process
840	pkqvhvquh.exe
840	pkqvhvquh.exe
840	pkqvhvquh.exe
1756	NETSTAT.EXE
1756	NETSTAT.EXE
1756	NETSTAT.EXE
1756	NETSTAT.EXE

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	840	pkqvhvquh.exe
Token: SeDebugPrivilege	1756	NETSTAT.EXE
Token: SeShutdownPrivilege	1424	Explorer.EXE
Token: SeShutdownPrivilege	1424	Explorer.EXE
Token: SeShutdownPrivilege	1424	Explorer.EXE

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
1424	Explorer.EXE
1424	Explorer.EXE

Suspicious use of SendNotifyMessage 2 IoCs

pid	Process
1424	Explorer.EXE
1424	Explorer.EXE

Suspicious use of WriteProcessMemory 32 IoCs

description	pid	Process	procid_target
PID 1800 wrote to memory of 2040	1800	vbc.exe	27
PID 1800 wrote to memory of 2040	1800	vbc.exe	27
PID 1800 wrote to memory of 2040	1800	vbc.exe	27
PID 1800 wrote to memory of 2040	1800	vbc.exe	27
PID 2040 wrote to memory of 840	2040	pkqvhvquh.exe	29
PID 2040 wrote to memory of 840	2040	pkqvhvquh.exe	29
PID 2040 wrote to memory of 840	2040	pkqvhvquh.exe	29
PID 2040 wrote to memory of 840	2040	pkqvhvquh.exe	29
PID 2040 wrote to memory of 840	2040	pkqvhvquh.exe	29
PID 2040 wrote to memory of 840	2040	pkqvhvquh.exe	29
PID 2040 wrote to memory of 840	2040	pkqvhvquh.exe	29
PID 1424 wrote to memory of 1756	1424	Explorer.EXE	30
PID 1424 wrote to memory of 1756	1424	Explorer.EXE	30
PID 1424 wrote to memory of 1756	1424	Explorer.EXE	30
PID 1424 wrote to memory of 1756	1424	Explorer.EXE	30
PID 1756 wrote to memory of 1604	1756	NETSTAT.EXE	31
PID 1756 wrote to memory of 1604	1756	NETSTAT.EXE	31
PID 1756 wrote to memory of 1604	1756	NETSTAT.EXE	31
PID 1756 wrote to memory of 1604	1756	NETSTAT.EXE	31
PID 1756 wrote to memory of 1916	1756	NETSTAT.EXE	34
PID 1756 wrote to memory of 1916	1756	NETSTAT.EXE	34
PID 1756 wrote to memory of 1916	1756	NETSTAT.EXE	34
PID 1756 wrote to memory of 1916	1756	NETSTAT.EXE	34
PID 1424 wrote to memory of 1920	1424	Explorer.EXE	35
PID 1424 wrote to memory of 1920	1424	Explorer.EXE	35
PID 1424 wrote to memory of 1920	1424	Explorer.EXE	35
PID 1424 wrote to memory of 1920	1424	Explorer.EXE	35
PID 1920 wrote to memory of 596	1920	certmgr7nmtbv.exe	37
PID 1920 wrote to memory of 596	1920	certmgr7nmtbv.exe	37
PID 1920 wrote to memory of 596	1920	certmgr7nmtbv.exe	37
PID 1920 wrote to memory of 596	1920	certmgr7nmtbv.exe	37
PID 1756 wrote to memory of 1916	1756	NETSTAT.EXE	34

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1424
- C:\Users\Admin\AppData\Local\Temp\vbc.exe
  "C:\Users\Admin\AppData\Local\Temp\vbc.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1800
- - C:\Users\Admin\AppData\Local\Temp\pkqvhvquh.exe
    C:\Users\Admin\AppData\Local\Temp\pkqvhvquh.exe C:\Users\Admin\AppData\Local\Temp\sfclhvjg
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Adds Run key to start application
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2040
  - - C:\Users\Admin\AppData\Local\Temp\pkqvhvquh.exe
      C:\Users\Admin\AppData\Local\Temp\pkqvhvquh.exe C:\Users\Admin\AppData\Local\Temp\sfclhvjg
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      Suspicious use of AdjustPrivilegeToken
      PID:840
- C:\Windows\SysWOW64\NETSTAT.EXE
  "C:\Windows\SysWOW64\NETSTAT.EXE"
  2⤵
  - Adds policy Run key to start application
  - Suspicious use of SetThreadContext
  - Drops file in Program Files directory
  - Gathers network information
  - Modifies Internet Explorer settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1756
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\pkqvhvquh.exe"
    3⤵
    PID:1604
- - C:\Program Files\Mozilla Firefox\Firefox.exe
    "C:\Program Files\Mozilla Firefox\Firefox.exe"
    3⤵
    PID:1916
- C:\Program Files (x86)\Nljod5z\certmgr7nmtbv.exe
  "C:\Program Files (x86)\Nljod5z\certmgr7nmtbv.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:1920
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1920 -s 232
    3⤵
    - Loads dropped DLL
    - Program crash
    PID:596

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Command-Line Interface

T1059

Scripting

T1064

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Scripting

T1064

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\Nljod5z\certmgr7nmtbv.exe

Filesize
5KB

MD5
8df2b872f8df8935914ac1db60ab1097

SHA1
9d88c7236639324e919e0580a38d1650b1095307

SHA256
50cd513f82edc742cbab4cbd8415b94410d23992bb85709fae0197eb006186f2

SHA512
a85b74e6188e7bc73d7cd801233be27a7e2d515b9ffaf41500629ad52a02644594e6ffad579dca5c5f34a0a25a8216298ae74436ced63f807bc88a046e2c4b56

Download Submit
C:\Program Files (x86)\Nljod5z\certmgr7nmtbv.exe

Filesize
5KB

MD5
8df2b872f8df8935914ac1db60ab1097

SHA1
9d88c7236639324e919e0580a38d1650b1095307

SHA256
50cd513f82edc742cbab4cbd8415b94410d23992bb85709fae0197eb006186f2

SHA512
a85b74e6188e7bc73d7cd801233be27a7e2d515b9ffaf41500629ad52a02644594e6ffad579dca5c5f34a0a25a8216298ae74436ced63f807bc88a046e2c4b56

Download Submit
C:\Users\Admin\AppData\Local\Temp\dnhag3q4ifcsljk8pz

Filesize
163KB

MD5
a4df8b94280c196485ffd4b96d5096cd

SHA1
c9945b172ca5db6460b795406bc86c17529c47fe

SHA256
ea34fa896c5ec70f9d80f2cf96d681c739f6ea5a26f5d51f90716f91b902d376

SHA512
c46ea9e76262a59d4b34bf533c87baac9316dbe36a1990866c8042ea666410a9d82e03fed333869184b3b8517b906105526a77442525d756752e6c017ec1a02f

Download Submit
C:\Users\Admin\AppData\Local\Temp\pkqvhvquh.exe

Filesize
5KB

MD5
8df2b872f8df8935914ac1db60ab1097

SHA1
9d88c7236639324e919e0580a38d1650b1095307

SHA256
50cd513f82edc742cbab4cbd8415b94410d23992bb85709fae0197eb006186f2

SHA512
a85b74e6188e7bc73d7cd801233be27a7e2d515b9ffaf41500629ad52a02644594e6ffad579dca5c5f34a0a25a8216298ae74436ced63f807bc88a046e2c4b56

Download Submit
C:\Users\Admin\AppData\Local\Temp\pkqvhvquh.exe

Filesize
5KB

MD5
8df2b872f8df8935914ac1db60ab1097

SHA1
9d88c7236639324e919e0580a38d1650b1095307

SHA256
50cd513f82edc742cbab4cbd8415b94410d23992bb85709fae0197eb006186f2

SHA512
a85b74e6188e7bc73d7cd801233be27a7e2d515b9ffaf41500629ad52a02644594e6ffad579dca5c5f34a0a25a8216298ae74436ced63f807bc88a046e2c4b56

Download Submit
C:\Users\Admin\AppData\Local\Temp\pkqvhvquh.exe

Filesize
5KB

MD5
8df2b872f8df8935914ac1db60ab1097

SHA1
9d88c7236639324e919e0580a38d1650b1095307

SHA256
50cd513f82edc742cbab4cbd8415b94410d23992bb85709fae0197eb006186f2

SHA512
a85b74e6188e7bc73d7cd801233be27a7e2d515b9ffaf41500629ad52a02644594e6ffad579dca5c5f34a0a25a8216298ae74436ced63f807bc88a046e2c4b56

Download Submit
C:\Users\Admin\AppData\Local\Temp\sfclhvjg

Filesize
7KB

MD5
2a5a9325a089fc3e74c4d6c82593e284

SHA1
433ffa18cd6ba5979a3d4dc41b9d9bcd9204099c

SHA256
7f46a014400d81509c35e6a8114bf791ae673050f8ab13008917cce00fe98983

SHA512
b5c50a1c5b837338c6332a9397404dfa828ec85534790b1f0728b4b462e873f31f09c4cfa7655255cbbf4840eb89af26007d5b6f5c264e6f40ebb66dd6884cd1

Download Submit
\Program Files (x86)\Nljod5z\certmgr7nmtbv.exe

Filesize
5KB

MD5
8df2b872f8df8935914ac1db60ab1097

SHA1
9d88c7236639324e919e0580a38d1650b1095307

SHA256
50cd513f82edc742cbab4cbd8415b94410d23992bb85709fae0197eb006186f2

SHA512
a85b74e6188e7bc73d7cd801233be27a7e2d515b9ffaf41500629ad52a02644594e6ffad579dca5c5f34a0a25a8216298ae74436ced63f807bc88a046e2c4b56

Download Submit
\Program Files (x86)\Nljod5z\certmgr7nmtbv.exe

Filesize
5KB

MD5
8df2b872f8df8935914ac1db60ab1097

SHA1
9d88c7236639324e919e0580a38d1650b1095307

SHA256
50cd513f82edc742cbab4cbd8415b94410d23992bb85709fae0197eb006186f2

SHA512
a85b74e6188e7bc73d7cd801233be27a7e2d515b9ffaf41500629ad52a02644594e6ffad579dca5c5f34a0a25a8216298ae74436ced63f807bc88a046e2c4b56

Download Submit
\Program Files (x86)\Nljod5z\certmgr7nmtbv.exe

Filesize
5KB

MD5
8df2b872f8df8935914ac1db60ab1097

SHA1
9d88c7236639324e919e0580a38d1650b1095307

SHA256
50cd513f82edc742cbab4cbd8415b94410d23992bb85709fae0197eb006186f2

SHA512
a85b74e6188e7bc73d7cd801233be27a7e2d515b9ffaf41500629ad52a02644594e6ffad579dca5c5f34a0a25a8216298ae74436ced63f807bc88a046e2c4b56

Download Submit
\Program Files (x86)\Nljod5z\certmgr7nmtbv.exe

Filesize
5KB

MD5
8df2b872f8df8935914ac1db60ab1097

SHA1
9d88c7236639324e919e0580a38d1650b1095307

SHA256
50cd513f82edc742cbab4cbd8415b94410d23992bb85709fae0197eb006186f2

SHA512
a85b74e6188e7bc73d7cd801233be27a7e2d515b9ffaf41500629ad52a02644594e6ffad579dca5c5f34a0a25a8216298ae74436ced63f807bc88a046e2c4b56

Download Submit
\Users\Admin\AppData\Local\Temp\pkqvhvquh.exe

Filesize
5KB

MD5
8df2b872f8df8935914ac1db60ab1097

SHA1
9d88c7236639324e919e0580a38d1650b1095307

SHA256
50cd513f82edc742cbab4cbd8415b94410d23992bb85709fae0197eb006186f2

SHA512
a85b74e6188e7bc73d7cd801233be27a7e2d515b9ffaf41500629ad52a02644594e6ffad579dca5c5f34a0a25a8216298ae74436ced63f807bc88a046e2c4b56

Download Submit
\Users\Admin\AppData\Local\Temp\pkqvhvquh.exe

Filesize
5KB

MD5
8df2b872f8df8935914ac1db60ab1097

SHA1
9d88c7236639324e919e0580a38d1650b1095307

SHA256
50cd513f82edc742cbab4cbd8415b94410d23992bb85709fae0197eb006186f2

SHA512
a85b74e6188e7bc73d7cd801233be27a7e2d515b9ffaf41500629ad52a02644594e6ffad579dca5c5f34a0a25a8216298ae74436ced63f807bc88a046e2c4b56

Download Submit
\Users\Admin\AppData\Local\Temp\pkqvhvquh.exe

Filesize
5KB

MD5
8df2b872f8df8935914ac1db60ab1097

SHA1
9d88c7236639324e919e0580a38d1650b1095307

SHA256
50cd513f82edc742cbab4cbd8415b94410d23992bb85709fae0197eb006186f2

SHA512
a85b74e6188e7bc73d7cd801233be27a7e2d515b9ffaf41500629ad52a02644594e6ffad579dca5c5f34a0a25a8216298ae74436ced63f807bc88a046e2c4b56

Download Submit
memory/840-68-0x0000000000820000-0x0000000000B23000-memory.dmp

Filesize
3.0MB

Download
memory/840-69-0x00000000002B0000-0x00000000002C1000-memory.dmp

Filesize
68KB

Download
memory/840-64-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/1424-70-0x0000000006A70000-0x0000000006B81000-memory.dmp

Filesize
1.1MB

Download
memory/1424-77-0x0000000008D70000-0x0000000008E84000-memory.dmp

Filesize
1.1MB

Download
memory/1756-76-0x0000000001E20000-0x0000000001EB0000-memory.dmp

Filesize
576KB

Download
memory/1756-74-0x00000000020F0000-0x00000000023F3000-memory.dmp

Filesize
3.0MB

Download
memory/1756-72-0x0000000000650000-0x0000000000659000-memory.dmp

Filesize
36KB

Download
memory/1756-73-0x0000000000080000-0x00000000000A9000-memory.dmp

Filesize
164KB

Download
memory/1800-54-0x0000000075C71000-0x0000000075C73000-memory.dmp

Filesize
8KB

Download