1d7b34e451017cab9eb200dbbd19150b13dd015193deb691027acad5ae2c3d1a

Analysis

max time kernel
151s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
24-11-2022 13:57

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General

Target

1d7b34e451017cab9eb200dbbd19150b13dd015193deb691027acad5ae2c3d1a.exe
Size

98KB
MD5

00748908d76108512f23f75a06121abe
SHA1

f9337ed78937699f66ad3216765c20b270b61fbd
SHA256

1d7b34e451017cab9eb200dbbd19150b13dd015193deb691027acad5ae2c3d1a
SHA512

93b6a33b3fd3d9b1e741ef87b0616c311235f445a1a4eae45159e7fa389538a6879b0d9d116482281d063550bbdd388b9ecba4c78446e7f645a4d4caf1850ff8
SSDEEP

3072:8Lk395hYXJxIL9ZslcFt0dAXNCJuhOP7BTmTQh5:8QqbILMlcFt0WCIIEQz

Score

10^/10

persistence upx

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

Processes:

yxmezis.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\ProgramData\\DownloadSave\\yxmezis.exe"	yxmezis.exe

Executes dropped EXE 4 IoCs

Processes:

kuaiboa.exe5015.exeyxmezis.exe yxmezis.exe

pid process

4952 kuaiboa.exe
4824 5015.exe
4840 yxmezis.exe
2676 yxmezis.exe

UPX packed file 3 IoCs

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

upx

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\kuaiboa.exe	upx
C:\Users\Admin\AppData\Local\Temp\kuaiboa.exe	upx
behavioral2/memory/4952-148-0x0000000000400000-0x0000000000415000-memory.dmp	upx

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

Processes:

1d7b34e451017cab9eb200dbbd19150b13dd015193deb691027acad5ae2c3d1a.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	1d7b34e451017cab9eb200dbbd19150b13dd015193deb691027acad5ae2c3d1a.exe

Loads dropped DLL 1 IoCs

Processes:

1d7b34e451017cab9eb200dbbd19150b13dd015193deb691027acad5ae2c3d1a.exe

pid process

632 1d7b34e451017cab9eb200dbbd19150b13dd015193deb691027acad5ae2c3d1a.exe

pid	process
632	1d7b34e451017cab9eb200dbbd19150b13dd015193deb691027acad5ae2c3d1a.exe

Enumerates connected drives 3 TTPs 23 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

yxmezis.exe

description	ioc	process
File opened (read-only)	\??\Y:	yxmezis.exe
File opened (read-only)	\??\S:	yxmezis.exe
File opened (read-only)	\??\M:	yxmezis.exe
File opened (read-only)	\??\E:	yxmezis.exe
File opened (read-only)	\??\Z:	yxmezis.exe
File opened (read-only)	\??\O:	yxmezis.exe
File opened (read-only)	\??\K:	yxmezis.exe
File opened (read-only)	\??\H:	yxmezis.exe
File opened (read-only)	\??\P:	yxmezis.exe
File opened (read-only)	\??\J:	yxmezis.exe
File opened (read-only)	\??\I:	yxmezis.exe
File opened (read-only)	\??\B:	yxmezis.exe
File opened (read-only)	\??\V:	yxmezis.exe
File opened (read-only)	\??\U:	yxmezis.exe
File opened (read-only)	\??\T:	yxmezis.exe
File opened (read-only)	\??\R:	yxmezis.exe
File opened (read-only)	\??\L:	yxmezis.exe
File opened (read-only)	\??\G:	yxmezis.exe
File opened (read-only)	\??\F:	yxmezis.exe
File opened (read-only)	\??\X:	yxmezis.exe
File opened (read-only)	\??\W:	yxmezis.exe
File opened (read-only)	\??\Q:	yxmezis.exe
File opened (read-only)	\??\N:	yxmezis.exe

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

Processes:

1d7b34e451017cab9eb200dbbd19150b13dd015193deb691027acad5ae2c3d1a.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	1d7b34e451017cab9eb200dbbd19150b13dd015193deb691027acad5ae2c3d1a.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

5015.exeyxmezis.exe

pid	process
4824	5015.exe
4824	5015.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

yxmezis.exe yxmezis.exe

description pid process

Token: SeIncBasePriorityPrivilege 4840 yxmezis.exe
Token: SeIncBasePriorityPrivilege 2676 yxmezis.exe

description	pid	process
Token: SeIncBasePriorityPrivilege	4840	yxmezis.exe
Token: SeIncBasePriorityPrivilege	2676	yxmezis.exe

Suspicious use of SetWindowsHookEx 15 IoCs

Processes:

kuaiboa.exe5015.exeyxmezis.exe yxmezis.exe

pid	process
4952	kuaiboa.exe
4824	5015.exe
4840	yxmezis.exe
4952	kuaiboa.exe
4952	kuaiboa.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
4840	yxmezis.exe
2676	yxmezis.exe
2676	yxmezis.exe
4840	yxmezis.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

1d7b34e451017cab9eb200dbbd19150b13dd015193deb691027acad5ae2c3d1a.exe5015.exeyxmezis.exe

description	pid	process	target process
PID 632 wrote to memory of 4952	632	1d7b34e451017cab9eb200dbbd19150b13dd015193deb691027acad5ae2c3d1a.exe	kuaiboa.exe
PID 632 wrote to memory of 4952	632	1d7b34e451017cab9eb200dbbd19150b13dd015193deb691027acad5ae2c3d1a.exe	kuaiboa.exe
PID 632 wrote to memory of 4952	632	1d7b34e451017cab9eb200dbbd19150b13dd015193deb691027acad5ae2c3d1a.exe	kuaiboa.exe
PID 632 wrote to memory of 4824	632	1d7b34e451017cab9eb200dbbd19150b13dd015193deb691027acad5ae2c3d1a.exe	5015.exe
PID 632 wrote to memory of 4824	632	1d7b34e451017cab9eb200dbbd19150b13dd015193deb691027acad5ae2c3d1a.exe	5015.exe
PID 632 wrote to memory of 4824	632	1d7b34e451017cab9eb200dbbd19150b13dd015193deb691027acad5ae2c3d1a.exe	5015.exe
PID 4824 wrote to memory of 4840	4824	5015.exe	yxmezis.exe
PID 4824 wrote to memory of 4840	4824	5015.exe	yxmezis.exe
PID 4824 wrote to memory of 4840	4824	5015.exe	yxmezis.exe
PID 4840 wrote to memory of 2676	4840	yxmezis.exe	yxmezis.exe
PID 4840 wrote to memory of 2676	4840	yxmezis.exe	yxmezis.exe
PID 4840 wrote to memory of 2676	4840	yxmezis.exe	yxmezis.exe

C:\Users\Admin\AppData\Local\Temp\1d7b34e451017cab9eb200dbbd19150b13dd015193deb691027acad5ae2c3d1a.exe
"C:\Users\Admin\AppData\Local\Temp\1d7b34e451017cab9eb200dbbd19150b13dd015193deb691027acad5ae2c3d1a.exe"
1⤵
- Checks computer location settings
- Loads dropped DLL
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:632

C:\Users\Admin\AppData\Local\Temp\kuaiboa.exe
"C:\Users\Admin\AppData\Local\Temp\kuaiboa.exe"
2⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
PID:4952

C:\Users\Admin\AppData\Local\Temp\5015.exe
"C:\Users\Admin\AppData\Local\Temp\5015.exe"
2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4824

C:\ProgramData\DownloadSave\yxmezis.exe
"C:\ProgramData\DownloadSave\yxmezis.exe"
3⤵
- Modifies WinLogon for persistence
- Executes dropped EXE
- Enumerates connected drives
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4840

C:\ProgramData\DownloadSave\ yxmezis.exe
"C:\ProgramData\DownloadSave\ yxmezis.exe"
4⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:2676

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\DownloadSave\ yxmezis.exe

Filesize
85KB

MD5
7f194b0222fb68ba977371144a8712d6

SHA1
1416935af16b097f771df457b31c3c91ad61273a

SHA256
4ee34ffd07363be307ef2ae092abc8ba36894737284755d3d9a526d349f96136

SHA512
22c73ec7fbd5a4348ef0694c829973e11ab2955d48f115aedaf849fba247185c75aa20208f2743d696f0a2657206a4b5f41d7fcb7e9d2be58593ab3f9ca9b448

Download Submit
C:\ProgramData\DownloadSave\ yxmezis.exe

Filesize
85KB

MD5
7f194b0222fb68ba977371144a8712d6

SHA1
1416935af16b097f771df457b31c3c91ad61273a

SHA256
4ee34ffd07363be307ef2ae092abc8ba36894737284755d3d9a526d349f96136

SHA512
22c73ec7fbd5a4348ef0694c829973e11ab2955d48f115aedaf849fba247185c75aa20208f2743d696f0a2657206a4b5f41d7fcb7e9d2be58593ab3f9ca9b448

Download Submit
C:\ProgramData\DownloadSave\RecordPath

Filesize
260B

MD5
624d1d7dfa2912638ae39817bce776c2

SHA1
f13712f0c7d68ff97c147f061aabb015c450211e

SHA256
51e01b42c8c3a6126f07b80f53a8e834a116353a816b3eee74d528b1edaaed15

SHA512
fdcccde861fcf1d1cd29214666ac5cbf28d39b6eab8048d33ae113e28877cc032e4b64fbdf916842b64425c231ea5ade578a1f3c2d47aee90fd44bfa9696896a

Download Submit
C:\ProgramData\DownloadSave\yxmezis.exe

Filesize
85KB

MD5
7f194b0222fb68ba977371144a8712d6

SHA1
1416935af16b097f771df457b31c3c91ad61273a

SHA256
4ee34ffd07363be307ef2ae092abc8ba36894737284755d3d9a526d349f96136

SHA512
22c73ec7fbd5a4348ef0694c829973e11ab2955d48f115aedaf849fba247185c75aa20208f2743d696f0a2657206a4b5f41d7fcb7e9d2be58593ab3f9ca9b448

Download Submit
C:\ProgramData\DownloadSave\yxmezis.exe

Filesize
85KB

MD5
7f194b0222fb68ba977371144a8712d6

SHA1
1416935af16b097f771df457b31c3c91ad61273a

SHA256
4ee34ffd07363be307ef2ae092abc8ba36894737284755d3d9a526d349f96136

SHA512
22c73ec7fbd5a4348ef0694c829973e11ab2955d48f115aedaf849fba247185c75aa20208f2743d696f0a2657206a4b5f41d7fcb7e9d2be58593ab3f9ca9b448

Download Submit
C:\Users\Admin\AppData\Local\Temp\5015.exe

Filesize
85KB

MD5
7f194b0222fb68ba977371144a8712d6

SHA1
1416935af16b097f771df457b31c3c91ad61273a

SHA256
4ee34ffd07363be307ef2ae092abc8ba36894737284755d3d9a526d349f96136

SHA512
22c73ec7fbd5a4348ef0694c829973e11ab2955d48f115aedaf849fba247185c75aa20208f2743d696f0a2657206a4b5f41d7fcb7e9d2be58593ab3f9ca9b448

Download Submit
C:\Users\Admin\AppData\Local\Temp\5015.exe

Filesize
85KB

MD5
7f194b0222fb68ba977371144a8712d6

SHA1
1416935af16b097f771df457b31c3c91ad61273a

SHA256
4ee34ffd07363be307ef2ae092abc8ba36894737284755d3d9a526d349f96136

SHA512
22c73ec7fbd5a4348ef0694c829973e11ab2955d48f115aedaf849fba247185c75aa20208f2743d696f0a2657206a4b5f41d7fcb7e9d2be58593ab3f9ca9b448

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

Filesize
32KB

MD5
6ce59e1bb6ca521b3ee118508a6a3030

SHA1
30bcf64377a2716f5dc6cc111cab0391eb113802

SHA256
01a3df9b5bd06c67547d1491377ff941cebad25487ee04e40d48adc3cb3d9521

SHA512
ef66fd1295c692081f46eecc0adc415c4709f2862aed8d9178e9918f70c6f265a98b214b9f0e70e7366acdedc75f946b55209a499939f4be9febe09de776f766

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

Filesize
32KB

MD5
6ce59e1bb6ca521b3ee118508a6a3030

SHA1
30bcf64377a2716f5dc6cc111cab0391eb113802

SHA256
01a3df9b5bd06c67547d1491377ff941cebad25487ee04e40d48adc3cb3d9521

SHA512
ef66fd1295c692081f46eecc0adc415c4709f2862aed8d9178e9918f70c6f265a98b214b9f0e70e7366acdedc75f946b55209a499939f4be9febe09de776f766

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsl7228.tmp\System.dll

Filesize
11KB

MD5
00a0194c20ee912257df53bfe258ee4a

SHA1
d7b4e319bc5119024690dc8230b9cc919b1b86b2

SHA256
dc4da2ccadb11099076926b02764b2b44ad8f97cd32337421a4cc21a3f5448f3

SHA512
3b38a2c17996c3b77ebf7b858a6c37415615e756792132878d8eddbd13cb06710b7da0e8b58104768f8e475fc93e8b44b3b1ab6f70ddf52edee111aaf5ef5667

Download Submit
memory/2676-145-0x0000000000000000-mapping.dmp

Download
memory/4824-137-0x0000000000000000-mapping.dmp

Download
memory/4840-141-0x0000000000000000-mapping.dmp

Download
memory/4952-133-0x0000000000000000-mapping.dmp

Download
memory/4952-148-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download