formbook | d55b3acb7fbeaf698e8b940f755c1363224663da98feee5abf93872e979460e9

Resubmissions

20/08/2022, 13:37

220820-qw1blaccej10

19/08/2022, 02:36

220819-c3k9csfcap10

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
19/08/2022, 02:36

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General

Target
Quotation-17-08-22.exe
Size 617KB
Sample220819-c3k9csfcap
SHA256 d55b3acb7fbeaf698e8b940f755c1363224663da98feee5abf93872e979460e9
MD5 0c077c650d7aa06a9ddd74df016134aa
SHA1 83d6f2176cac6e47041b37cab9f67f78ebb692db
SHA512 d5e6c6ef5a0e46b7fddf16243aa5ff810d90fab3e573190fc6dacd8bab0111ae115940da7fb8f543908aaed26e5d65495cd1f911adae87a71168162e2b2f3996
MD5 SHA1 SHA512

Score

10^/10

formbook xloader loader persistence rat spyware stealer trojan

Malware Config

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

Xloader payload 4 IoCs

rat

resource	yara_rule
behavioral2/memory/1216-138-0x0000000000400000-0x000000000042D000-memory.dmp	xloader
behavioral2/memory/1216-144-0x0000000000400000-0x000000000042D000-memory.dmp	xloader
behavioral2/memory/1052-147-0x0000000000D40000-0x0000000000D6D000-memory.dmp	xloader
behavioral2/memory/1052-151-0x0000000000D40000-0x0000000000D6D000-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	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\3FZ0EFD0 = "C:\\Program Files (x86)\\Malfxv4g8\\frxdnhlhufw.exe"	rundll32.exe

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-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	Quotation-17-08-22.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1696 set thread context of 1216	1696	Quotation-17-08-22.exe	85
PID 1216 set thread context of 992	1216	Quotation-17-08-22.exe	47
PID 1052 set thread context of 992	1052	rundll32.exe	47

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Malfxv4g8\frxdnhlhufw.exe	rundll32.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\Registry\User\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	rundll32.exe

Suspicious behavior: EnumeratesProcesses 34 IoCs

pid	Process
1216	Quotation-17-08-22.exe
1216	Quotation-17-08-22.exe
1216	Quotation-17-08-22.exe
1216	Quotation-17-08-22.exe
1052	rundll32.exe
1052	rundll32.exe
1052	rundll32.exe
1052	rundll32.exe
1052	rundll32.exe
1052	rundll32.exe
1052	rundll32.exe
1052	rundll32.exe
1052	rundll32.exe
1052	rundll32.exe
1052	rundll32.exe
1052	rundll32.exe
1052	rundll32.exe
1052	rundll32.exe
1052	rundll32.exe
1052	rundll32.exe
1052	rundll32.exe
1052	rundll32.exe
1052	rundll32.exe
1052	rundll32.exe
1052	rundll32.exe
1052	rundll32.exe
1052	rundll32.exe
1052	rundll32.exe
1052	rundll32.exe
1052	rundll32.exe
1052	rundll32.exe
1052	rundll32.exe
1052	rundll32.exe
1052	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
992	Explorer.EXE

Suspicious behavior: MapViewOfSection 7 IoCs

pid	Process
1216	Quotation-17-08-22.exe
1216	Quotation-17-08-22.exe
1216	Quotation-17-08-22.exe
1052	rundll32.exe
1052	rundll32.exe
1052	rundll32.exe
1052	rundll32.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1216	Quotation-17-08-22.exe
Token: SeDebugPrivilege	1052	rundll32.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 1696 wrote to memory of 1216	1696	Quotation-17-08-22.exe	85
PID 1696 wrote to memory of 1216	1696	Quotation-17-08-22.exe	85
PID 1696 wrote to memory of 1216	1696	Quotation-17-08-22.exe	85
PID 1696 wrote to memory of 1216	1696	Quotation-17-08-22.exe	85
PID 1696 wrote to memory of 1216	1696	Quotation-17-08-22.exe	85
PID 1696 wrote to memory of 1216	1696	Quotation-17-08-22.exe	85
PID 992 wrote to memory of 1052	992	Explorer.EXE	86
PID 992 wrote to memory of 1052	992	Explorer.EXE	86
PID 992 wrote to memory of 1052	992	Explorer.EXE	86
PID 1052 wrote to memory of 1452	1052	rundll32.exe	87
PID 1052 wrote to memory of 1452	1052	rundll32.exe	87
PID 1052 wrote to memory of 1452	1052	rundll32.exe	87
PID 1052 wrote to memory of 4112	1052	rundll32.exe	89
PID 1052 wrote to memory of 4112	1052	rundll32.exe	89
PID 1052 wrote to memory of 4112	1052	rundll32.exe	89
PID 1052 wrote to memory of 3604	1052	rundll32.exe	91
PID 1052 wrote to memory of 3604	1052	rundll32.exe	91
PID 1052 wrote to memory of 3604	1052	rundll32.exe	91
PID 1052 wrote to memory of 1656	1052	rundll32.exe	93
PID 1052 wrote to memory of 1656	1052	rundll32.exe	93
PID 1052 wrote to memory of 1656	1052	rundll32.exe	93

System policy modification 1 TTPs 1 IoCs

evasion

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer	rundll32.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:992
- C:\Users\Admin\AppData\Local\Temp\Quotation-17-08-22.exe
  "C:\Users\Admin\AppData\Local\Temp\Quotation-17-08-22.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:1696
- - C:\Users\Admin\AppData\Local\Temp\Quotation-17-08-22.exe
    "C:\Users\Admin\AppData\Local\Temp\Quotation-17-08-22.exe"
    3⤵
    - Checks computer location settings
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:1216
- C:\Windows\SysWOW64\rundll32.exe
  "C:\Windows\SysWOW64\rundll32.exe"
  2⤵
  - Adds policy Run key to start application
  - Suspicious use of SetThreadContext
  - Drops file in Program Files directory
  - Modifies Internet Explorer settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  - System policy modification
  PID:1052
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\Quotation-17-08-22.exe"
    3⤵
    PID:1452
- - C:\Windows\SysWOW64\cmd.exe
    /c copy "C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Login Data" "C:\Users\Admin\AppData\Local\Temp\DB1" /V
    3⤵
    PID:4112
- - C:\Windows\SysWOW64\cmd.exe
    /c copy "C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Login Data" "C:\Users\Admin\AppData\Local\Temp\DB1" /V
    3⤵
    PID:3604
- - C:\Program Files\Mozilla Firefox\Firefox.exe
    "C:\Program Files\Mozilla Firefox\Firefox.exe"
    3⤵
    PID:1656

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

DB1

Path C:\Users\Admin\AppData\Local\Temp\DB1
Size 40KB
SHA256 b281ce54125d4250a80f48fcc02a8eea53f2c35c3b726e2512c3d493da0013bf
MD5 b608d407fc15adea97c26936bc6f03f6
SHA1 953e7420801c76393902c0d6bb56148947e41571
SHA512 cc96ddf4bf90d6aaa9d86803cb2aa30cd8e9b295aee1bd5544b88aeab63dc60bb1d4641e846c9771bab51aabbfbcd984c6d3ee83b96f5b65d09c0841d464b9e4
SSDEEP 48:2j3WBA+IIYICVEq8MX0D0HSFlNUK6lGNxGt7KLk8s8LKvUf9KVyJ7hU:u2FCn8MZyFlulGNxGt7KLyeymw
MD5 SHA1 SHA512 SSDEEP

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DB1

Path C:\Users\Admin\AppData\Local\Temp\DB1
Size 48KB
SHA256 c9fd7be4579e4aa942e8c2b44ab10115fa6c2fe6afd0c584865413d9d53f3b2a
MD5 349e6eb110e34a08924d92f6b334801d
SHA1 bdfb289daff51890cc71697b6322aa4b35ec9169
SHA512 2a635b815a5e117ea181ee79305ee1baf591459427acc5210d8c6c7e447be3513ead871c605eb3d32e4ab4111b2a335f26520d0ef8c1245a4af44e1faec44574
SSDEEP 96:uRMKLyeymwxCn8MZyFlSynlbiXyKwt8hG:uRkxGOXnlbibhG
MD5 SHA1 SHA512 SSDEEP

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memory/992-152-0x0000000002830000-0x0000000002911000-memory.dmp

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memory/992-150-0x0000000002830000-0x0000000002911000-memory.dmp

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memory/992-142-0x0000000002C20000-0x0000000002D4E000-memory.dmp

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memory/1052-146-0x0000000000F10000-0x0000000000F24000-memory.dmp

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memory/1052-151-0x0000000000D40000-0x0000000000D6D000-memory.dmp

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memory/1052-149-0x0000000002D00000-0x0000000002D90000-memory.dmp

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memory/1052-148-0x0000000002ED0000-0x000000000321A000-memory.dmp

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memory/1052-147-0x0000000000D40000-0x0000000000D6D000-memory.dmp

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memory/1216-138-0x0000000000400000-0x000000000042D000-memory.dmp

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memory/1216-144-0x0000000000400000-0x000000000042D000-memory.dmp

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memory/1216-141-0x0000000000F50000-0x0000000000F61000-memory.dmp

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memory/1216-140-0x0000000000F90000-0x00000000012DA000-memory.dmp

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memory/1696-132-0x0000000000A20000-0x0000000000AC0000-memory.dmp

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memory/1696-136-0x0000000007BD0000-0x0000000007C6C000-memory.dmp

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memory/1696-135-0x00000000054F0000-0x00000000054FA000-memory.dmp

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memory/1696-134-0x0000000005440000-0x00000000054D2000-memory.dmp

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memory/1696-133-0x0000000005910000-0x0000000005EB4000-memory.dmp

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