joker | fe83311ce241e5b34fd0cfe567eb20039bdc8d2e6c71d02fdd2050b2a536fd2f

Analysis

max time kernel
155s
max time network
179s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
20/10/2022, 13:50

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General

Target
fe83311ce241e5b34fd0cfe567eb20039bdc8d2e6c71d02fdd2050b2a536fd2f.exe
Size 27KB
Sample221020-q5dtysgdc8
SHA256 fe83311ce241e5b34fd0cfe567eb20039bdc8d2e6c71d02fdd2050b2a536fd2f
MD5 48ef14c9e3f77ede2d868c1fe28154b0
SHA1 de131002f2034948de8cf1a714ff8c11417abf34
SHA512 f9f40838845cb01a66c1504db479eb9114c798f678b5d0f5314bc1636eb2d5be04c6e3c0f4053ef099cfcd6287742ee0d11e4bbda92983a8a80b5adf36973762
SSDEEP 768:r51hwke4u9Ybj+i+RTf9PuONOsC9yoYf:rVFe4rbjsZpuRv+
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

joker infostealer trojan upx

Malware Config

Extracted

Family

joker

http://tttie.oss-cn-shenzhen.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
116	install1968982.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4092-132-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/4092-133-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/files/0x0003000000000727-135.dat	upx
behavioral2/files/0x0003000000000727-136.dat	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	fe83311ce241e5b34fd0cfe567eb20039bdc8d2e6c71d02fdd2050b2a536fd2f.exe

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Common Files\open.ini	fe83311ce241e5b34fd0cfe567eb20039bdc8d2e6c71d02fdd2050b2a536fd2f.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 3 IoCs

description	pid	Process	procid_target
PID 4092 wrote to memory of 116	4092	fe83311ce241e5b34fd0cfe567eb20039bdc8d2e6c71d02fdd2050b2a536fd2f.exe	84
PID 4092 wrote to memory of 116	4092	fe83311ce241e5b34fd0cfe567eb20039bdc8d2e6c71d02fdd2050b2a536fd2f.exe	84
PID 4092 wrote to memory of 116	4092	fe83311ce241e5b34fd0cfe567eb20039bdc8d2e6c71d02fdd2050b2a536fd2f.exe	84

C:\Users\Admin\AppData\Local\Temp\fe83311ce241e5b34fd0cfe567eb20039bdc8d2e6c71d02fdd2050b2a536fd2f.exe
"C:\Users\Admin\AppData\Local\Temp\fe83311ce241e5b34fd0cfe567eb20039bdc8d2e6c71d02fdd2050b2a536fd2f.exe"
1⤵
- Checks computer location settings
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:4092
- 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
  PID:116

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

install1968982.exe

Path C:\Users\Admin\AppData\Local\Temp\sbnimb.tmp\dtstop.tmp\install1968982.exe
Size 4.6MB
SHA256 110f6a132f05a0d7b31d449beb75c7b22cd1fd409d50b32ded10e8ac305d852e
MD5 512fe2eb54dde3c922ce73c075a592a1
SHA1 4332a256f0a77381ecd11e823475c335691325d7
SHA512 a3f6fda13e054d5f3f52f0b62895c94b467b32e5811bf52e91c7c747554204af150c0bddce229bcd4b912c575079376ffdd02dbe281d2a59f1f6824b464b993e
SSDEEP 98304:EUJnzBzzzzzPsVhAPUQXaORY8uRl9RXfHSVoPEkzbD90W4mhihJgQbiRBDFr7tNp:rBzzzzzPQyfjYZ1vozkD9x/hiXcR1t7m
MD5 SHA1 SHA512 SSDEEP

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