joker | 18cc13c1471ee634a087a1562dd58e848bb37077043150bd28cc334fff5ce0c3

Analysis

max time kernel
188s
max time network
194s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
06-11-2022 09:37

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General

Target

18cc13c1471ee634a087a1562dd58e848bb37077043150bd28cc334fff5ce0c3.exe
Size

27KB
MD5

1932bdb6062dfa590b4ab9da45cd9bb0
SHA1

e20891fb56e40ff49feb9c8183329386ed4a0c98
SHA256

18cc13c1471ee634a087a1562dd58e848bb37077043150bd28cc334fff5ce0c3
SHA512

1626011f178d94adf13a75abe6a46da4144abe6fd8e9335b41bef583e331533847a05b05524d8ea6e290b93435567ad74fd6eda85f91633365ba39db7a414298
SSDEEP

768:rntDssLlSB16cM7lVO5HrttXntC9yoYf:rnRLl08/cHrtg+

Score

10^/10

joker bootkit infostealer persistence trojan upx

Malware Config

Extracted

Family

joker

http://mmtie.oss-cn-hangzhou.aliyuncs.com

Signatures

joker
Joker is an Android malware that targets billing and SMS fraud.
infostealer trojan joker
Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
1852	install1968982.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/620-132-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/files/0x00050000000162ad-134.dat	upx
behavioral2/files/0x00050000000162ad-135.dat	upx
behavioral2/memory/1852-136-0x0000000000400000-0x0000000000600000-memory.dmp	upx
behavioral2/memory/1852-137-0x0000000000400000-0x0000000000600000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	18cc13c1471ee634a087a1562dd58e848bb37077043150bd28cc334fff5ce0c3.exe

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1067

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	install1968982.exe

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Common Files\open.ini	18cc13c1471ee634a087a1562dd58e848bb37077043150bd28cc334fff5ce0c3.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 2 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CAA2D3B1-4BB5-4a45-A17A-122773379D99}	install1968982.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CAA2D3B1-4BB5-4a45-A17A-122773379D99}\ProcID = "{D7489318-D5A1-1B29-3030-303133000000}"	install1968982.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 620 wrote to memory of 1852	620	18cc13c1471ee634a087a1562dd58e848bb37077043150bd28cc334fff5ce0c3.exe	87
PID 620 wrote to memory of 1852	620	18cc13c1471ee634a087a1562dd58e848bb37077043150bd28cc334fff5ce0c3.exe	87
PID 620 wrote to memory of 1852	620	18cc13c1471ee634a087a1562dd58e848bb37077043150bd28cc334fff5ce0c3.exe	87

C:\Users\Admin\AppData\Local\Temp\18cc13c1471ee634a087a1562dd58e848bb37077043150bd28cc334fff5ce0c3.exe
"C:\Users\Admin\AppData\Local\Temp\18cc13c1471ee634a087a1562dd58e848bb37077043150bd28cc334fff5ce0c3.exe"
1⤵
- Checks computer location settings
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:620
- C:\Users\Admin\AppData\Local\Temp\sbnimb.tmp\dtstop.tmp\install1968982.exe
  "C:\Users\Admin\AppData\Local\Temp\sbnimb.tmp\dtstop.tmp\install1968982.exe"
  2⤵
  - Executes dropped EXE
  - Writes to the Master Boot Record (MBR)
  - Modifies registry class
  PID:1852

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Bootkit

T1067

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\sbnimb.tmp\dtstop.tmp\install1968982.exe

Filesize
4.6MB

MD5
512fe2eb54dde3c922ce73c075a592a1

SHA1
4332a256f0a77381ecd11e823475c335691325d7

SHA256
110f6a132f05a0d7b31d449beb75c7b22cd1fd409d50b32ded10e8ac305d852e

SHA512
a3f6fda13e054d5f3f52f0b62895c94b467b32e5811bf52e91c7c747554204af150c0bddce229bcd4b912c575079376ffdd02dbe281d2a59f1f6824b464b993e

Download Submit
C:\Users\Admin\AppData\Local\Temp\sbnimb.tmp\dtstop.tmp\install1968982.exe

Filesize
4.6MB

MD5
512fe2eb54dde3c922ce73c075a592a1

SHA1
4332a256f0a77381ecd11e823475c335691325d7

SHA256
110f6a132f05a0d7b31d449beb75c7b22cd1fd409d50b32ded10e8ac305d852e

SHA512
a3f6fda13e054d5f3f52f0b62895c94b467b32e5811bf52e91c7c747554204af150c0bddce229bcd4b912c575079376ffdd02dbe281d2a59f1f6824b464b993e

Download Submit
memory/620-132-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1852-136-0x0000000000400000-0x0000000000600000-memory.dmp

Filesize
2.0MB

Download
memory/1852-137-0x0000000000400000-0x0000000000600000-memory.dmp

Filesize
2.0MB

Download