formbook | 8fc72b5ec8701ea1681ab2b170652cc65a43765657919f4fd104f967ff944e21

Analysis

max time kernel
151s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
20/10/2022, 15:54

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General

Target
4a3a63e28d36ef40fb1dd6897480ddb1.exe
Size 258KB
Sample221020-tb7fyscea5
SHA256 8fc72b5ec8701ea1681ab2b170652cc65a43765657919f4fd104f967ff944e21
MD5 4a3a63e28d36ef40fb1dd6897480ddb1
SHA1 6980ed874467f249416c52dd970aea59bb942a13
SHA512 c80e136dd88e509237138605f0172e8b9cbbeb54a244dcf7113bb6d89a443ed7f4be2c7dc07c40927965210249ac612bfacc6ec5aedad40aca3e74cdf28f8de2
SSDEEP 6144:mbE/HUbyNxUYQUwCp3sU1w2e7NFPchHwvz5KEpbS:mb/ybrp3fwOhHw75FS
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

formbook wzm0 rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Campaign

wzm0

Decoy

N/JT7H4noNlLX1doSwJMBTQIp3xSJiMy
6OFR7nA/Irk7KsC5CaXFqJhM8diJjdXf4A==
1E+rStTEXWwnp3Q4q9A=
TP1bARPMPQl1WtzN
ArcWsLbGZXFWe+3P
WjqcQPIDzi1rOO3S
iQQ2yWUV3oMV/ZmaFFGou5DuVc3BTJs=
iqKw0X8j1FlWe+3P
Zd8KkH9wKWdWe+3P
WtkAY+O1XAQmsudOJaQg0H4=
5cAk33Qgn81WDCLa
I7RE48+vKzxcmZuRdQlBtTyegA==
GrMj8P7ORboGi5viIw==
lUqhOVcRkM/AbehHGNknD7FojYcj
8W2dMCjt9jRd
8nmpM0Hijr2PPXHkUGuaUB59HM3BTJs=
kek93nkdL6cnVA==
/rTmauCvZgoS1VziXg8T
TZyxQsPDhshxQurJFcoVxOTF
iRNK2FRO8BbCLTCjETt/Wkbk4Zop
b9Y22E4EzXAA6YNKFKieFdzziQ==
afRaL2U1yAVeZvy2SwEK
EKMVsS7saZt4/fpTkpj851flhWw=
Y06xSmxmG6Qmg8hJt6Qg0H4=
LvFU9RnLPlF9a/22SwEK
tHemLJg/FE2Blcxpock=
8nXjvdlyR6XbQ2s=
K95G6uHfeI+rnVRIQ/P8r8YvomQ=
f/dXI0HflDFWe+3P
6a4Y6Y1yA0TLEyUfAJPrgvUtoGQ=
aw+FPHdpMG1We+3P
Xy+NL3t2RaXbQ2s=
vkSyeXd9RZRxzfRRJqQg0H4=
3E13Frp0T+BIgZF9pPsO8A==
L+Mb3G3g06wLSQ==
dT9+Hr+lQXzn7klBKw==
C+pG6BwZ1BAsJmhTMg==
mBtDqjPaoroWVWdGhbcpIEHk4Zop
yC9rPNiuiiS9rj0xeR0+9VflhWw=
nXOtQLi2S3ZP38xpock=
EMf5lZ5o3F2aDCMoIw==
1H3Ck7qAWI1Gx9hLt6Qg0H4=
1J7/znddG/BRY3M=
fmjQnEj3wPQxVrzpXl9L+A==
/qQW6hP2hsK3awP0YXkVxOTF
9tlJ6xEV2htFXw62SwEK
sogG4x8r9qxQS8yzIEV8FdzziQ==
+mmNpcFeYXl2SJ3Itxyf+RMBng==
hyR6Fte/TXpR38xpock=
/YbyvtiGA1R22edLQvf85DUo+phxMg==
pyVK5SQT2ZQXUW5ypPsO8A==
tTuefILtL6cnVA==
oSiIG5+Sh5eOVAwO594=
V6GBWeeQW/mThAu2SwEK
2KMOpS3MihR7Wf22SwEK
GuJTJkUcqNy1YfmBbwv5nQnukw==
ee0hvVPkd6CB3Q1us6Qg0H4=
qqsF7I3b06wLSQ==
WfCEXZOWXxTI+I0OA1yQesfN
yG/fqjn/1Hn07klBKw==
zTuNAQ2pp+MZXg==
16MPrz/OX5Sibg+2SwEK
7oPwi8pk7fxA
qy5X8Bvrdo+8pRwND9JMPWD87a9QYEI6
rizhenpin.com

Signatures

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

Executes dropped EXE 1 IoCs

pid	Process
1624	gnpmyrrth.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-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	gnpmyrrth.exe

Loads dropped DLL 1 IoCs

pid	Process
4452	gnpmyrrth.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1624 set thread context of 4452	1624	gnpmyrrth.exe	82
PID 4452 set thread context of 2932	4452	gnpmyrrth.exe	44
PID 3676 set thread context of 2932	3676	cmmon32.exe	44

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

System Information Discovery
T1082

Program crash 3 IoCs

pid	pid_target	Process	procid_target
1448	1624	WerFault.exe	81
4624	1624	WerFault.exe	81
3976	1624	WerFault.exe	81

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\Registry\User\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	cmmon32.exe

Suspicious behavior: EnumeratesProcesses 62 IoCs

pid	Process
4452	gnpmyrrth.exe
4452	gnpmyrrth.exe
4452	gnpmyrrth.exe
4452	gnpmyrrth.exe
4452	gnpmyrrth.exe
4452	gnpmyrrth.exe
4452	gnpmyrrth.exe
4452	gnpmyrrth.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2932	Explorer.EXE

Suspicious behavior: MapViewOfSection 7 IoCs

pid	Process
4452	gnpmyrrth.exe
4452	gnpmyrrth.exe
4452	gnpmyrrth.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe
3676	cmmon32.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	4452	gnpmyrrth.exe
Token: SeShutdownPrivilege	2932	Explorer.EXE
Token: SeCreatePagefilePrivilege	2932	Explorer.EXE
Token: SeShutdownPrivilege	2932	Explorer.EXE
Token: SeCreatePagefilePrivilege	2932	Explorer.EXE
Token: SeShutdownPrivilege	2932	Explorer.EXE
Token: SeCreatePagefilePrivilege	2932	Explorer.EXE
Token: SeDebugPrivilege	3676	cmmon32.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 4708 wrote to memory of 1624	4708	4a3a63e28d36ef40fb1dd6897480ddb1.exe	81
PID 4708 wrote to memory of 1624	4708	4a3a63e28d36ef40fb1dd6897480ddb1.exe	81
PID 4708 wrote to memory of 1624	4708	4a3a63e28d36ef40fb1dd6897480ddb1.exe	81
PID 1624 wrote to memory of 4452	1624	gnpmyrrth.exe	82
PID 1624 wrote to memory of 4452	1624	gnpmyrrth.exe	82
PID 1624 wrote to memory of 4452	1624	gnpmyrrth.exe	82
PID 1624 wrote to memory of 4452	1624	gnpmyrrth.exe	82
PID 2932 wrote to memory of 3676	2932	Explorer.EXE	85
PID 2932 wrote to memory of 3676	2932	Explorer.EXE	85
PID 2932 wrote to memory of 3676	2932	Explorer.EXE	85
PID 3676 wrote to memory of 4720	3676	cmmon32.exe	97
PID 3676 wrote to memory of 4720	3676	cmmon32.exe	97
PID 3676 wrote to memory of 4720	3676	cmmon32.exe	97

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2932
- C:\Users\Admin\AppData\Local\Temp\4a3a63e28d36ef40fb1dd6897480ddb1.exe
  "C:\Users\Admin\AppData\Local\Temp\4a3a63e28d36ef40fb1dd6897480ddb1.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4708
- - C:\Users\Admin\AppData\Local\Temp\gnpmyrrth.exe
    "C:\Users\Admin\AppData\Local\Temp\gnpmyrrth.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1624
  - - C:\Users\Admin\AppData\Local\Temp\gnpmyrrth.exe
      "C:\Users\Admin\AppData\Local\Temp\gnpmyrrth.exe"
      4⤵
      Checks computer location settings
      Loads dropped DLL
      Suspicious use of SetThreadContext
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      Suspicious use of AdjustPrivilegeToken
      PID:4452
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1624 -s 536
      4⤵
      Program crash
      PID:1448
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1624 -s 536
      4⤵
      Program crash
      PID:4624
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1624 -s 524
      4⤵
      Program crash
      PID:3976
- C:\Windows\SysWOW64\cmmon32.exe
  "C:\Windows\SysWOW64\cmmon32.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Modifies Internet Explorer settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3676
- - C:\Program Files\Mozilla Firefox\Firefox.exe
    "C:\Program Files\Mozilla Firefox\Firefox.exe"
    3⤵
    PID:4720

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 360 -p 1624 -ip 1624
1⤵
PID:3948

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 1624 -ip 1624
1⤵
PID:1660

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 516 -p 1624 -ip 1624
1⤵
PID:4792

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

edrmu.ox

Path C:\Users\Admin\AppData\Local\Temp\edrmu.ox
Size 185KB
SHA256 45ba63df0f1540e6c3071aec2fd8a4996bb4ba98238e078d717c10334240c320
MD5 5da69789e78a0e6b622f60c1a330dfc6
SHA1 97f5a9772c3b9fd498fb6d506e99061a64215017
SHA512 d339659a2960efc8a26c136315606ac8c3b170fb1ae9f13c0ddba934f5f35a05e553f34d691ade182f3dff4bfbdda86e85bed1faf69866b255776b163c7efdcc
SSDEEP 3072:lc/lLGWkV7jBPoTFXalYQU0gOdDCp7DB/R8UeEqRsq4VepvFFKEf3MhH9WfHRy/6:lELG1BAxUYQU4Cp7sU1w2epNFPchHwvj
MD5 SHA1 SHA512 SSDEEP

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gnpmyrrth.exe

Path C:\Users\Admin\AppData\Local\Temp\gnpmyrrth.exe
Size 58KB
SHA256 dc469b496e291cea4cda2a136d0497c8f7ff8308f3c33fde46fd6a7deed1e28f
MD5 bab329add648357fdef5be889cd4447f
SHA1 5b44b164b480ea29d83605573379e7721ce5b42f
SHA512 9f516852c1b985c741b2d0078f8ef92993c16afcc343eaa4cbd4d101fdc9764de6a66f5163f4218f9b377d0fa95810bf0974e6b0edcf03bd3dcd689c0d72c4ed
SSDEEP 1536:Z1ep1tOKxVeU01JVlG9NSstFdGxveJh7LY0q:Z10tOKinJlwN2ypq
MD5 SHA1 SHA512 SSDEEP

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gnpmyrrth.exe

Path C:\Users\Admin\AppData\Local\Temp\gnpmyrrth.exe
Size 58KB
SHA256 dc469b496e291cea4cda2a136d0497c8f7ff8308f3c33fde46fd6a7deed1e28f
MD5 bab329add648357fdef5be889cd4447f
SHA1 5b44b164b480ea29d83605573379e7721ce5b42f
SHA512 9f516852c1b985c741b2d0078f8ef92993c16afcc343eaa4cbd4d101fdc9764de6a66f5163f4218f9b377d0fa95810bf0974e6b0edcf03bd3dcd689c0d72c4ed
SSDEEP 1536:Z1ep1tOKxVeU01JVlG9NSstFdGxveJh7LY0q:Z10tOKinJlwN2ypq
MD5 SHA1 SHA512 SSDEEP

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gnpmyrrth.exe

Path C:\Users\Admin\AppData\Local\Temp\gnpmyrrth.exe
Size 58KB
SHA256 dc469b496e291cea4cda2a136d0497c8f7ff8308f3c33fde46fd6a7deed1e28f
MD5 bab329add648357fdef5be889cd4447f
SHA1 5b44b164b480ea29d83605573379e7721ce5b42f
SHA512 9f516852c1b985c741b2d0078f8ef92993c16afcc343eaa4cbd4d101fdc9764de6a66f5163f4218f9b377d0fa95810bf0974e6b0edcf03bd3dcd689c0d72c4ed
SSDEEP 1536:Z1ep1tOKxVeU01JVlG9NSstFdGxveJh7LY0q:Z10tOKinJlwN2ypq
MD5 SHA1 SHA512 SSDEEP

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uksaxaf.dvr

Path C:\Users\Admin\AppData\Local\Temp\uksaxaf.dvr
Size 4KB
SHA256 1c92e7459ffea560afd9de5277770a9bbca4223d96cd516d96acabc072faebbe
MD5 b8641c1af8b01970f384a1000a061715
SHA1 072bacf7e2bd7351c2c6a0f765b855727e717928
SHA512 4390097a9b67bbde47b90d2f1e71e912b0e32e6259f781ebe723265a281b0099a4d6d09f795a6a0c3c3708c8fc81454412830a0629e9b69142a3abc023b6b0ac
SSDEEP 96:gsqdYWjAhlozGY6G+KUa3pFxbTWI7kelMpUfaQj:gsMYWjAreGY6u5jmI7kerf/j
MD5 SHA1 SHA512 SSDEEP

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memory/2932-152-0x0000000002DD0000-0x0000000002EC9000-memory.dmp

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memory/2932-150-0x0000000002DD0000-0x0000000002EC9000-memory.dmp

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memory/2932-143-0x0000000008190000-0x0000000008300000-memory.dmp

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memory/3676-147-0x0000000000E20000-0x0000000000E4D000-memory.dmp

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memory/3676-151-0x0000000000E20000-0x0000000000E4D000-memory.dmp

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memory/3676-149-0x0000000002B90000-0x0000000002C1F000-memory.dmp

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memory/3676-148-0x0000000002D60000-0x00000000030AA000-memory.dmp

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memory/3676-146-0x0000000000F30000-0x0000000000F3C000-memory.dmp

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memory/4452-145-0x0000000000400000-0x000000000042F000-memory.dmp

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memory/4452-142-0x0000000000DC0000-0x0000000000DD0000-memory.dmp

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memory/4452-141-0x0000000001580000-0x00000000018CA000-memory.dmp

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memory/4452-140-0x0000000000401000-0x000000000042F000-memory.dmp

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memory/4452-139-0x0000000000400000-0x000000000042F000-memory.dmp

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