a94cf160138f443e5a14fd8dc7c413a1a712b5b3c48681aa9495c53cd5db52d3

Analysis

max time kernel
124s
max time network
194s
platform
windows7_x64
resource
win7-20220414-en
submitted
21-05-2022 03:56

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General

Target

x32/eSm1_IO.dll
Size

1.1MB
MD5

fcd7cda75dc741881ce9d5d20ea72944
SHA1

f3880aa76f65efdc471a71681dbab6de930d09bb
SHA256

682ebd5f3ba7d41151b2313ab25d97a4376e948bda6496a9bce16d7de34c30ac
SHA512

16b4702012cb661dd1a3f37c74e681b0bb7f47244e027c7fa587ab532447fd2045d0dbf825033d39fe4ffe7563b0d2af00f23c9902f14a1c690f54f4534bd3d7

Score

8^/10

upx

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

rundll32mgr.exe

pid process

1780 rundll32mgr.exe

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
\Windows\SysWOW64\rundll32mgr.exe	upx
\Windows\SysWOW64\rundll32mgr.exe	upx
C:\Windows\SysWOW64\rundll32mgr.exe	upx
behavioral25/memory/1780-60-0x0000000000400000-0x000000000045B000-memory.dmp	upx

Loads dropped DLL 2 IoCs

Processes:

rundll32.exe

pid process

820 rundll32.exe
820 rundll32.exe
Drops file in System32 directory 1 IoCs

Processes:

rundll32.exe

description ioc process

File created C:\Windows\SysWOW64\rundll32mgr.exe rundll32.exe

pid	process
820	rundll32.exe
820	rundll32.exe

description	ioc	process
File created	C:\Windows\SysWOW64\rundll32mgr.exe	rundll32.exe

Modifies Internet Explorer settings 1 TTPs 52 IoCs

adware spyware

Modify Registry

T1112

Processes:

iexplore.exeiexplore.exeIEXPLORE.EXEIEXPLORE.EXE

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\InternetRegistry	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Zoom	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive\{53054D51-D8D9-11EC-93D3-D2F97027F5CF} = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\PageSetup	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\BrowserEmulation\LowMic	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\GPU	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "359883837"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\IETld\LowMic	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Zoom	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\LowRegistry	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\LowRegistry\DontShowMeThisDialogAgain	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Toolbar	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\LowRegistry\DOMStorage	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\LowRegistry\DOMStorage	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "1"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main	IEXPLORE.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\en-US = "en-US.1"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Toolbar	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main\FullScreen = "no"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\DomainSuggestion	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\GPU	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\IntelliForms	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\IETld\LowMic	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\IntelliForms	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive\{53052641-D8D9-11EC-93D3-D2F97027F5CF} = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\LowRegistry	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main\FullScreen = "no"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\PageSetup	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff3d0000003d000000c3040000a2020000	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\BrowserEmulation\LowMic	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\InternetRegistry	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\LowRegistry\DontShowMeThisDialogAgain	iexplore.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

rundll32mgr.exe

pid	process
1780	rundll32mgr.exe
1780	rundll32mgr.exe
1780	rundll32mgr.exe
1780	rundll32mgr.exe
1780	rundll32mgr.exe
1780	rundll32mgr.exe
1780	rundll32mgr.exe
1780	rundll32mgr.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

rundll32mgr.exe

description pid process

Token: SeDebugPrivilege 1780 rundll32mgr.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

iexplore.exeiexplore.exe

pid process

1420 iexplore.exe
1348 iexplore.exe

description	pid	process
Token: SeDebugPrivilege	1780	rundll32mgr.exe

Suspicious use of SetWindowsHookEx 10 IoCs

Processes:

iexplore.exeiexplore.exeIEXPLORE.EXEIEXPLORE.EXE

pid	process
1420	iexplore.exe
1420	iexplore.exe
1348	iexplore.exe
1348	iexplore.exe
588	IEXPLORE.EXE
588	IEXPLORE.EXE
300	IEXPLORE.EXE
300	IEXPLORE.EXE
588	IEXPLORE.EXE
588	IEXPLORE.EXE

Suspicious use of WriteProcessMemory 27 IoCs

Processes:

rundll32.exerundll32.exerundll32mgr.exeiexplore.exeiexplore.exe

description	pid	process	target process
PID 1504 wrote to memory of 820	1504	rundll32.exe	rundll32.exe
PID 1504 wrote to memory of 820	1504	rundll32.exe	rundll32.exe
PID 1504 wrote to memory of 820	1504	rundll32.exe	rundll32.exe
PID 1504 wrote to memory of 820	1504	rundll32.exe	rundll32.exe
PID 1504 wrote to memory of 820	1504	rundll32.exe	rundll32.exe
PID 1504 wrote to memory of 820	1504	rundll32.exe	rundll32.exe
PID 1504 wrote to memory of 820	1504	rundll32.exe	rundll32.exe
PID 820 wrote to memory of 1780	820	rundll32.exe	rundll32mgr.exe
PID 820 wrote to memory of 1780	820	rundll32.exe	rundll32mgr.exe
PID 820 wrote to memory of 1780	820	rundll32.exe	rundll32mgr.exe
PID 820 wrote to memory of 1780	820	rundll32.exe	rundll32mgr.exe
PID 1780 wrote to memory of 1348	1780	rundll32mgr.exe	iexplore.exe
PID 1780 wrote to memory of 1348	1780	rundll32mgr.exe	iexplore.exe
PID 1780 wrote to memory of 1348	1780	rundll32mgr.exe	iexplore.exe
PID 1780 wrote to memory of 1348	1780	rundll32mgr.exe	iexplore.exe
PID 1780 wrote to memory of 1420	1780	rundll32mgr.exe	iexplore.exe
PID 1780 wrote to memory of 1420	1780	rundll32mgr.exe	iexplore.exe
PID 1780 wrote to memory of 1420	1780	rundll32mgr.exe	iexplore.exe
PID 1780 wrote to memory of 1420	1780	rundll32mgr.exe	iexplore.exe
PID 1420 wrote to memory of 588	1420	iexplore.exe	IEXPLORE.EXE
PID 1420 wrote to memory of 588	1420	iexplore.exe	IEXPLORE.EXE
PID 1420 wrote to memory of 588	1420	iexplore.exe	IEXPLORE.EXE
PID 1420 wrote to memory of 588	1420	iexplore.exe	IEXPLORE.EXE
PID 1348 wrote to memory of 300	1348	iexplore.exe	IEXPLORE.EXE
PID 1348 wrote to memory of 300	1348	iexplore.exe	IEXPLORE.EXE
PID 1348 wrote to memory of 300	1348	iexplore.exe	IEXPLORE.EXE
PID 1348 wrote to memory of 300	1348	iexplore.exe	IEXPLORE.EXE

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\x32\eSm1_IO.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1504

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\x32\eSm1_IO.dll,#1
2⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:820

C:\Windows\SysWOW64\rundll32mgr.exe
C:\Windows\SysWOW64\rundll32mgr.exe
3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1780

C:\Program Files\Internet Explorer\iexplore.exe
"C:\Program Files\Internet Explorer\iexplore.exe"
4⤵
- Modifies Internet Explorer settings
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1348

C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
"C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1348 CREDAT:275457 /prefetch:2
5⤵
- Modifies Internet Explorer settings
- Suspicious use of SetWindowsHookEx
PID:300

C:\Program Files\Internet Explorer\iexplore.exe
"C:\Program Files\Internet Explorer\iexplore.exe"
4⤵
- Modifies Internet Explorer settings
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1420

C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
"C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1420 CREDAT:275457 /prefetch:2
5⤵
- Modifies Internet Explorer settings
- Suspicious use of SetWindowsHookEx
PID:588

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\Recovery\High\Active\RecoveryStore.{53054D51-D8D9-11EC-93D3-D2F97027F5CF}.dat
Filesize
3KB

MD5
0fbe77b13b82a0299332dae111cd75b0

SHA1
c8f8e6f645b4a3b00102e5bbaa6747edbc6e778e

SHA256
7c957ac4a48886f4887e7996d810d5d340b36e6da76d559f02796aaddd9c060e

SHA512
76e5c7ba0c4f31dc6e576ef4e26f72f5084e2abba6cc44dd843b389b2735106af519fe63cc8c06f14c6f0cf6c5eb9f8450835ef148fd217ca1e643c507849191

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Cookies\C0HC6CDR.txt
Filesize
600B

MD5
fa2e460aab20f1cc0d6514d69578045a

SHA1
69a133cb7775072a41f3077a3cdb1ec3d1272dc6

SHA256
8993e91d31cac3988aaa2632495166ebb0694f8008419d0e0fd63f5e70ce7ee1

SHA512
146072ec760effd37137b3a348f468051725a653d5177650d0a34c8ca597f63812d588883694559fa711e5c361a208c7e4e34372a8f9f0bb55e51c0f70879a65

Download Submit
C:\Windows\SysWOW64\rundll32mgr.exe
Filesize
105KB

MD5
dfb5daabb95dcfad1a5faf9ab1437076

SHA1
4a199569a9b52911bee7fb19ab80570cc5ff9ed1

SHA256
54282ec29d4993ed6e9972122cfbb70bba4898a21d527bd9e72a166d7ec2fdc0

SHA512
5d31c34403ab5f8db4a6d84f2b5579d4ea18673914b626d78e458a648ac20ddd8e342818e807331036d7bb064f596a02b9737acac42fbead29260343a30717e8

Download Submit
\Windows\SysWOW64\rundll32mgr.exe
Filesize
105KB

MD5
dfb5daabb95dcfad1a5faf9ab1437076

SHA1
4a199569a9b52911bee7fb19ab80570cc5ff9ed1

SHA256
54282ec29d4993ed6e9972122cfbb70bba4898a21d527bd9e72a166d7ec2fdc0

SHA512
5d31c34403ab5f8db4a6d84f2b5579d4ea18673914b626d78e458a648ac20ddd8e342818e807331036d7bb064f596a02b9737acac42fbead29260343a30717e8

Download Submit
\Windows\SysWOW64\rundll32mgr.exe
Filesize
105KB

MD5
dfb5daabb95dcfad1a5faf9ab1437076

SHA1
4a199569a9b52911bee7fb19ab80570cc5ff9ed1

SHA256
54282ec29d4993ed6e9972122cfbb70bba4898a21d527bd9e72a166d7ec2fdc0

SHA512
5d31c34403ab5f8db4a6d84f2b5579d4ea18673914b626d78e458a648ac20ddd8e342818e807331036d7bb064f596a02b9737acac42fbead29260343a30717e8

Download Submit
memory/820-54-0x0000000000000000-mapping.dmp

Download
memory/820-55-0x0000000075371000-0x0000000075373000-memory.dmp

Filesize
8KB

Download
memory/1780-58-0x0000000000000000-mapping.dmp

Download
memory/1780-60-0x0000000000400000-0x000000000045B000-memory.dmp

Filesize
364KB

Download