5178fc4896049fc29c0c1d6cca080705263debcaf47077829f0d8c882959de83

Analysis

max time kernel
144s
max time network
138s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
01/06/2024, 01:25

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General

Target

5178fc4896049fc29c0c1d6cca080705263debcaf47077829f0d8c882959de83.exe
Size

54.0MB
MD5

8583a7539b74e8223d479f70c6b2de51
SHA1

b0c2427c0899c20b725b85dff1126a696c372857
SHA256

5178fc4896049fc29c0c1d6cca080705263debcaf47077829f0d8c882959de83
SHA512

2434db81b7356e1ded0b86d80b29fd87449225283f5d59313bb875107548b46d1c2513a92a0392cae0ec5aef01a135fd9c91fe7863df0634b0858bf85f7100dc
SSDEEP

98304:xDr5t+zSg6zFhQdQBFgtD75qFb0I+0PqkW:xvzTvQdQsD7sbS

Score

7^/10

persistence

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
4848	TASLogin.exe
5108	TASLogin.exe

Loads dropped DLL 1 IoCs

pid	Process
4848	TASLogin.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\IFfmsjhgsda = "C:\\Users\\Public\\Documents\\1YHYHX\\TASLogin.exe"	TASLogin.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4848 set thread context of 5108	4848	TASLogin.exe	95

Modifies Internet Explorer settings 1 TTPs 4 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\SOFTWARE\Microsoft\Internet Explorer\Toolbar\Locked = "1"	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\SOFTWARE\Microsoft\Internet Explorer\Toolbar\ShellBrowser	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\SOFTWARE\Microsoft\Internet Explorer\Toolbar\ShellBrowser\ITBar7Layout = 13000000000000000000000020000000100000000000000001000000010700005e01000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\Software\Microsoft\Internet Explorer\Toolbar	explorer.exe

Modifies registry class 33 IoCs

description	ioc	Process
Set value (data)	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0 = 7800310000000000a8582e611100557365727300640009000400efbe874f7748c1582d0b2e000000c70500000000010000000000000000003a0000000000f7c54b0055007300650072007300000040007300680065006c006c00330032002e0064006c006c002c002d0032003100380031003300000014000000	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\MRUListEx = 00000000ffffffff	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0 = 7800310000000000c1582d0b11004d7573696300640009000400efbe874fdb49c1582d0b2e000000fd0500000000010000000000000000003a00000000004415e3004d007500730069006300000040007300680065006c006c00330032002e0064006c006c002c002d0032003100380030003300000014000000	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0 = 19002f433a5c000000000000000000000000000000000000000000	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\MRUListEx = 00000000ffffffff	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000_Classes\CLSID\{018D5C66-4533-4307-9B53-224DE2ED1FE6}\Instance\	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0	explorer.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{4336a54d-038b-4685-ab02-99bb52d3fb8b}\Instance\	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000_Classes\Local Settings	OpenWith.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = 00000000ffffffff	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\MRUListEx = 00000000ffffffff	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0\NodeSlot = "1"	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000_Classes\Local Settings	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0 = 14001f50e04fd020ea3a6910a2d808002b30309d0000	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0 = 7c00310000000000c1582c0b11005075626c69630000660009000400efbe874fdb49c1582d0b2e000000f80500000000010000000000000000003c0000000000e3830c005000750062006c0069006300000040007300680065006c006c00330032002e0064006c006c002c002d0032003100380031003600000016000000	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\MRUListEx = 00000000ffffffff	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots = 02	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0\MRUListEx = ffffffff	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1	explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\Shell\SniffedFolderType = "Music"	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\Shell	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\MRUListEx = 00000000ffffffff	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0 = 5400310000000000c1582d0b100045554559455800003e0009000400efbec1582d0bc1582d0b2e000000d13302000000070000000000000000000000000000004415e300450055004500590045005800000016000000	explorer.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
3912	explorer.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4272	5178fc4896049fc29c0c1d6cca080705263debcaf47077829f0d8c882959de83.exe
4272	5178fc4896049fc29c0c1d6cca080705263debcaf47077829f0d8c882959de83.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5108	TASLogin.exe
Token: SeShutdownPrivilege	5108	TASLogin.exe

Suspicious use of SetWindowsHookEx 5 IoCs

pid	Process
4272	5178fc4896049fc29c0c1d6cca080705263debcaf47077829f0d8c882959de83.exe
4272	5178fc4896049fc29c0c1d6cca080705263debcaf47077829f0d8c882959de83.exe
3912	explorer.exe
3912	explorer.exe
2840	OpenWith.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4272 wrote to memory of 1352	4272	5178fc4896049fc29c0c1d6cca080705263debcaf47077829f0d8c882959de83.exe	82
PID 4272 wrote to memory of 1352	4272	5178fc4896049fc29c0c1d6cca080705263debcaf47077829f0d8c882959de83.exe	82
PID 3912 wrote to memory of 4848	3912	explorer.exe	93
PID 3912 wrote to memory of 4848	3912	explorer.exe	93
PID 3912 wrote to memory of 4848	3912	explorer.exe	93
PID 4848 wrote to memory of 5108	4848	TASLogin.exe	95
PID 4848 wrote to memory of 5108	4848	TASLogin.exe	95
PID 4848 wrote to memory of 5108	4848	TASLogin.exe	95
PID 4848 wrote to memory of 5108	4848	TASLogin.exe	95
PID 4848 wrote to memory of 5108	4848	TASLogin.exe	95

C:\Users\Admin\AppData\Local\Temp\5178fc4896049fc29c0c1d6cca080705263debcaf47077829f0d8c882959de83.exe
"C:\Users\Admin\AppData\Local\Temp\5178fc4896049fc29c0c1d6cca080705263debcaf47077829f0d8c882959de83.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4272
- C:\Windows\explorer.exe
  C:\Windows\explorer.exe C:\Users\Public\Music\EUEYEX
  2⤵
  PID:1352

C:\Windows\explorer.exe
C:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding
1⤵
- Modifies Internet Explorer settings
- Modifies registry class
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3912
- C:\Users\Public\Documents\1YHYHX\TASLogin.exe
  "C:\Users\Public\Documents\1YHYHX\TASLogin.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:4848
- - C:\Users\Public\Documents\1YHYHX\TASLogin.exe
    C:\Users\Public\Documents\1YHYHX\TASLogin.exe
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:5108

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:432

C:\Windows\system32\OpenWith.exe
C:\Windows\system32\OpenWith.exe -Embedding
1⤵
- Modifies registry class
- Suspicious use of SetWindowsHookEx
PID:2840

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

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\Windows\Explorer\iconcache_idx.db

Filesize
28KB

MD5
d5665ef0cf8ed15e02bd4e049303a777

SHA1
195783839058c0d56a1006b1f7b1fb90f3f690a2

SHA256
39d0f4532cdf0c09fb7d9cd3467d13f210ee2a94c0592178ae685e43a5121cb3

SHA512
08367dce50ff7264467648ae68a926c09e74a426d9d322472f10912988d2bc3eaa542f94655c98a4ffa31b3fdf319cfd71a2b16cbf12a7bc43aec080be511808

Download Submit
C:\Users\Public\22I2I2

Filesize
2.0MB

MD5
49ca5d6fb817f9af89284dc0be61a1cf

SHA1
7b3d00869d8fb0266783250046ba0c11cf45ce18

SHA256
072eafa9fb2840f6588abe7b6c992d89192609996da4579951de4a0f4afec6c0

SHA512
ca1a3fb0f164e74d58ee190ba31a7bc6d8ef50c4ab63ed6f8ebcbd7df339a1de2aa6393eb694e288ab32b32668413331cf86d6ee0e06ecad1a838498bbf4946d

Download Submit
C:\Users\Public\Documents\1YHYHX\TASLogin.exe

Filesize
567KB

MD5
e6a3caccbd9ca82f38a14bd0d4428240

SHA1
63937051b04582255505261d512a80ab40513b5f

SHA256
ca1f26619b4483f4bda6b4d352b58a9c4f30c2e985e62e761b7d6f3440922264

SHA512
21fbc87528dbc6b0f4aee165d9b812595ad1d30af434c401f4bc86d8bd6a209da950523cf00e7ae5fb1676350cd299d96e0e7a0255e6ebf53aeb7e51dd5d133e

Download Submit
C:\Users\Public\Documents\1YHYHX\gii.png

Filesize
317KB

MD5
dba8607e46cceda5dd57916a6bd8c7c7

SHA1
c99c80cb5d46035b05a7dedb6e7d22946ce2dd94

SHA256
8b44645c0bec9179cbb8ffd027395127d81ecc3b3ac5271b29e5221bc88ce10f

SHA512
76dedd75107e24dabf30893a720af642e49c513a5a1ec80d5c9cb1baed8c7f29023455cf3aa75a5f7de90b542dec6d13490a03d482755a8d301402e5914dd9af

Download Submit
C:\Users\Public\Documents\1YHYHX\lee_yeon_woo.hwp

Filesize
130KB

MD5
ebe2802b6afa5a08bcd83f8d5202fbc6

SHA1
7018f7332d98781236c3abc10097dae7dd53bb1f

SHA256
c074b60774ca11085dcd7f34772f2979769dd9ae38b0766fa7b829bb68d02a4a

SHA512
fb6d29a5889d2335ad348dfb772f2aa0d34caef4d0955c2924ad1bb1207ed24a06555341ad206ff10a035600a4299c0429952d6fc1305aebf2c82054628d6ed3

Download Submit
C:\Users\Public\Music\EUEYEX\EXEXHX.url

Filesize
135B

MD5
b5ec2ad8561202d74f282f4b28058c2a

SHA1
45f440fc68502c144aa9e3e6a6f2fea2570d4e48

SHA256
3cea6a95da065b2eb4beb8072a40645e59b0043ba56e9c61b3805f2fcc91bab3

SHA512
cfed75a993fcefc1a6ff695edfb7b3fd9989d0ac6162032e41c6e73033e52b48def1ee6cfca740df781d36d796de1007e7086378e1d863f37415471155a15555

Download Submit
C:\Users\Public\Music\EUEYEX\SCSP8S.url

Filesize
131B

MD5
b1c8e18ef45bda95066699592f0282ee

SHA1
d405c7049fc91f6a77f182a89b71485c8820b535

SHA256
2001cac8eb1b98508b99aa64d6963ba70bfb804d93af4c93760baf9a1943b599

SHA512
7426a11857966766af3ec54c29e44a3eb4d4fe6efd72735be4ec5d0cd5f5366ad08f861c0f3e1ea9d2041ad4e886f4a792020de824bc77f37df10915cb4f78ca

Download Submit
memory/4848-52-0x0000000000400000-0x00000000004EB000-memory.dmp

Filesize
940KB

Download
memory/4848-64-0x0000000010000000-0x0000000013601000-memory.dmp

Filesize
54.0MB

Download
memory/4848-61-0x0000000010000000-0x0000000013601000-memory.dmp

Filesize
54.0MB

Download
memory/5108-57-0x0000000000400000-0x0000000000493000-memory.dmp

Filesize
588KB

Download
memory/5108-59-0x0000000000400000-0x0000000000493000-memory.dmp

Filesize
588KB

Download
memory/5108-60-0x0000000000400000-0x0000000000493000-memory.dmp

Filesize
588KB

Download
memory/5108-58-0x0000000000400000-0x0000000000493000-memory.dmp

Filesize
588KB

Download
memory/5108-56-0x0000000000400000-0x0000000000493000-memory.dmp

Filesize
588KB

Download
memory/5108-62-0x0000000000400000-0x0000000000493000-memory.dmp

Filesize
588KB

Download
memory/5108-63-0x0000000000400000-0x0000000000493000-memory.dmp

Filesize
588KB

Download
memory/5108-54-0x0000000000400000-0x0000000000493000-memory.dmp

Filesize
588KB

Download
memory/5108-65-0x0000000000400000-0x0000000000493000-memory.dmp

Filesize
588KB

Download
memory/5108-70-0x0000000000400000-0x0000000000493000-memory.dmp

Filesize
588KB

Download
memory/5108-71-0x0000000000400000-0x0000000000493000-memory.dmp

Filesize
588KB

Download
memory/5108-74-0x0000000000400000-0x0000000000493000-memory.dmp

Filesize
588KB

Download
memory/5108-77-0x0000000000400000-0x0000000000493000-memory.dmp

Filesize
588KB

Download