joker | 0554fa5e8f910d1f8ade323076e0efe75dc00d357512976b667e28c6bc915e8a

General

Target

0554fa5e8f910d1f8ade323076e0efe75dc00d357512976b667e28c6bc915e8a.exe
Size

32KB
MD5

41a992c2e74797e76521dc86fba9d730
SHA1

ffc0e7ca2b9ad263a325fd30e3e2bda867ec310b
SHA256

0554fa5e8f910d1f8ade323076e0efe75dc00d357512976b667e28c6bc915e8a
SHA512

8b2ea42d3ed6d14d67754c60d4784fdfad97c565e5d495dc3e68b26d762eca44e93c4e33a428494be7bc631ac4aeeff810ba16193ed6b24a327a540caba4fe04
SSDEEP

768:r51WbPH59kgi2fKACIaFleZQWTGBxMLfb41CYR/9m:rHWbZltfjCHwQWT/81L

Score

10^/10

joker bootkit infostealer persistence trojan upx

Malware Config

Extracted

Family

joker

C2

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 2 IoCs

pid	Process
936	install1968982.exe
1700	duba_1_244.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0003000000000727-136.dat	upx
behavioral2/files/0x0003000000000727-137.dat	upx
behavioral2/memory/936-138-0x0000000000400000-0x0000000000600000-memory.dmp	upx
behavioral2/files/0x0006000000022e20-140.dat	upx
behavioral2/files/0x0006000000022e20-141.dat	upx
behavioral2/memory/1700-144-0x0000000000400000-0x000000000051E000-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	0554fa5e8f910d1f8ade323076e0efe75dc00d357512976b667e28c6bc915e8a.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	0554fa5e8f910d1f8ade323076e0efe75dc00d357512976b667e28c6bc915e8a.exe

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4732 wrote to memory of 936	4732	0554fa5e8f910d1f8ade323076e0efe75dc00d357512976b667e28c6bc915e8a.exe	92
PID 4732 wrote to memory of 936	4732	0554fa5e8f910d1f8ade323076e0efe75dc00d357512976b667e28c6bc915e8a.exe	92
PID 4732 wrote to memory of 936	4732	0554fa5e8f910d1f8ade323076e0efe75dc00d357512976b667e28c6bc915e8a.exe	92
PID 4732 wrote to memory of 1700	4732	0554fa5e8f910d1f8ade323076e0efe75dc00d357512976b667e28c6bc915e8a.exe	93
PID 4732 wrote to memory of 1700	4732	0554fa5e8f910d1f8ade323076e0efe75dc00d357512976b667e28c6bc915e8a.exe	93
PID 4732 wrote to memory of 1700	4732	0554fa5e8f910d1f8ade323076e0efe75dc00d357512976b667e28c6bc915e8a.exe	93
PID 4732 wrote to memory of 4496	4732	0554fa5e8f910d1f8ade323076e0efe75dc00d357512976b667e28c6bc915e8a.exe	94
PID 4732 wrote to memory of 4496	4732	0554fa5e8f910d1f8ade323076e0efe75dc00d357512976b667e28c6bc915e8a.exe	94
PID 4732 wrote to memory of 4496	4732	0554fa5e8f910d1f8ade323076e0efe75dc00d357512976b667e28c6bc915e8a.exe	94

C:\Users\Admin\AppData\Local\Temp\0554fa5e8f910d1f8ade323076e0efe75dc00d357512976b667e28c6bc915e8a.exe
"C:\Users\Admin\AppData\Local\Temp\0554fa5e8f910d1f8ade323076e0efe75dc00d357512976b667e28c6bc915e8a.exe"
1⤵
- Checks computer location settings
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:4732
- 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)
  PID:936
- C:\Users\Admin\AppData\Local\Temp\sbnimb.tmp\dtstop.tmp\duba_1_244.exe
  "C:\Users\Admin\AppData\Local\Temp\sbnimb.tmp\dtstop.tmp\duba_1_244.exe"
  2⤵
  - Executes dropped EXE
  PID:1700
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\0554fa5e8f910d1f8ade323076e0efe75dc00d357512976b667e28c6bc915e8a.exe.bat
  2⤵
  PID:4496

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Bootkit

1

T1067

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\sbnimb.tmp\dtstop.tmp\duba_1_244.exe

Filesize
16.8MB

MD5
1f1c87b2b8528523907cc58c00923df8

SHA1
ea0f7ad5e2d0bc48e52ea9e00c56dc14ea026514

SHA256
37e29c28eb4a4753f6926c2f7dfd169a09e184264f537c64893637716237733a

SHA512
2a8d2107eb8d479d8378c780389278e2d20653954d93dea72700b9bb9c21bc7ecf826243c1aadf8a6bc2705cc9d0055a01cf24c32a8ba38cca87ca51abd66fbc

Download Submit
C:\Users\Admin\AppData\Local\Temp\sbnimb.tmp\dtstop.tmp\duba_1_244.exe

Filesize
16.8MB

MD5
1f1c87b2b8528523907cc58c00923df8

SHA1
ea0f7ad5e2d0bc48e52ea9e00c56dc14ea026514

SHA256
37e29c28eb4a4753f6926c2f7dfd169a09e184264f537c64893637716237733a

SHA512
2a8d2107eb8d479d8378c780389278e2d20653954d93dea72700b9bb9c21bc7ecf826243c1aadf8a6bc2705cc9d0055a01cf24c32a8ba38cca87ca51abd66fbc

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
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/936-138-0x0000000000400000-0x0000000000600000-memory.dmp

Filesize
2.0MB

Download
memory/1700-144-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/4732-132-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/4732-134-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/4732-133-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/4732-143-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download

Analysis

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