856e717d098a404466029967ca61644b48495599464d98a9b9b93ef5013fda9d

Analysis

max time kernel
147s
max time network
127s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
26-12-2023 07:08

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

5b906587a5be3427f67fbebf8c52743a.exe
Size

767KB
MD5

5b906587a5be3427f67fbebf8c52743a
SHA1

e0b09a152493c18a19442847189eb05652318654
SHA256

856e717d098a404466029967ca61644b48495599464d98a9b9b93ef5013fda9d
SHA512

5f9d47bee9f25b0dd3aa632d49b043acd5ad922b586daacbe9aaab5d5945b0acc9bcc0d0991ee2c5c4fe95a983c5f376079c579b39c3644c14d45c689d91e89f
SSDEEP

12288:IWDLGQ5voSnS2cKiU/kXXZEDQBFmNO1leA4LuUyr/wuZyc200rkWiyayfak2+g:BLGQ5vlnSCiUsnZcQFe5JyrYqEqrfP

Score

7^/10

discovery upx

Malware Config

Signatures

Checks computer location settings 2 TTPs 2 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-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	5b906587a5be3427f67fbebf8c52743a.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	csrss.exe

Executes dropped EXE 2 IoCs

pid	Process
2540	csrss.exe
4420	hex.exe

UPX packed file 17 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2540-41-0x0000000000400000-0x00000000005C6000-memory.dmp	upx
behavioral2/files/0x0006000000023219-39.dat	upx
behavioral2/files/0x0006000000023219-38.dat	upx
behavioral2/memory/2540-360-0x0000000000400000-0x00000000005C6000-memory.dmp	upx
behavioral2/memory/2540-364-0x0000000000400000-0x00000000005C6000-memory.dmp	upx
behavioral2/memory/2540-371-0x0000000000400000-0x00000000005C6000-memory.dmp	upx
behavioral2/memory/2540-375-0x0000000000400000-0x00000000005C6000-memory.dmp	upx
behavioral2/memory/2540-382-0x0000000000400000-0x00000000005C6000-memory.dmp	upx
behavioral2/memory/2540-386-0x0000000000400000-0x00000000005C6000-memory.dmp	upx
behavioral2/memory/2540-390-0x0000000000400000-0x00000000005C6000-memory.dmp	upx
behavioral2/memory/2540-397-0x0000000000400000-0x00000000005C6000-memory.dmp	upx
behavioral2/memory/2540-402-0x0000000000400000-0x00000000005C6000-memory.dmp	upx
behavioral2/memory/2540-409-0x0000000000400000-0x00000000005C6000-memory.dmp	upx
behavioral2/memory/2540-413-0x0000000000400000-0x00000000005C6000-memory.dmp	upx
behavioral2/memory/2540-416-0x0000000000400000-0x00000000005C6000-memory.dmp	upx
behavioral2/memory/2540-424-0x0000000000400000-0x00000000005C6000-memory.dmp	upx
behavioral2/memory/2540-428-0x0000000000400000-0x00000000005C6000-memory.dmp	upx

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops desktop.ini file(s) 2 IoCs

description	ioc	Process
File created	C:\RECYCLER\S-1-5-21-3252328098-71414409-2463015037-501\desktop.ini	5b906587a5be3427f67fbebf8c52743a.exe
File opened for modification	C:\RECYCLER\S-1-5-21-3252328098-71414409-2463015037-501\desktop.ini	5b906587a5be3427f67fbebf8c52743a.exe

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

System Information Discovery
T1082

Modifies registry class 40 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\ChatFile\Shell\open\ddeexec\Topic\ = "Connect"	csrss.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\irc\EditFlags = 02000000	csrss.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.cha\ = "ChatFile"	csrss.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\ChatFile\Shell\open\ddeexec\Application\ = "mIRC"	csrss.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\irc\Shell	csrss.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\irc\Shell\open\command	csrss.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\irc\Shell\open\command\ = "\"C:\\RECYCLER\\S-1-5-21-3252328098-71414409-2463015037-501\\csrss.exe\" -noconnect"	csrss.exe
Key created	\REGISTRY\MACHINE\Software\Classes\irc\Shell\open\ddeexec\Application	csrss.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.cha	csrss.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.chat\ = "ChatFile"	csrss.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\ChatFile\Shell\open\command\ = "\"C:\\RECYCLER\\S-1-5-21-3252328098-71414409-2463015037-501\\csrss.exe\" -noconnect"	csrss.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\irc\Shell\open\ddeexec\ = "%1"	csrss.exe
Key created	\REGISTRY\MACHINE\Software\Classes\irc\Shell\open\ddeexec\ifexec	csrss.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\ChatFile\Shell	csrss.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\ChatFile\Shell\open\ddeexec\ifexec\ = "%1"	csrss.exe
Key created	\REGISTRY\MACHINE\Software\Classes\irc	csrss.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\irc\DefaultIcon\ = "\"C:\\RECYCLER\\S-1-5-21-3252328098-71414409-2463015037-501\\csrss.exe\""	csrss.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\ChatFile	csrss.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\ChatFile\Shell\open	csrss.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\ChatFile\Shell\open\ddeexec\ = "%1"	csrss.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\irc	csrss.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\ChatFile\Shell\open\ddeexec\Topic	csrss.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\irc\ = "URL:IRC Protocol"	csrss.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\irc\Shell\open\ddeexec\ifexec\ = "%1"	csrss.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\irc\Shell\open\ddeexec\Topic\ = "Connect"	csrss.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.chat	csrss.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\ChatFile\ = "Chat File"	csrss.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\ChatFile\DefaultIcon	csrss.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\ChatFile\Shell\open\command	csrss.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\ChatFile\Shell\open\ddeexec	csrss.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\ChatFile\Shell\open\ddeexec\Application	csrss.exe
Key created	\REGISTRY\MACHINE\Software\Classes\irc\DefaultIcon	csrss.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\irc\Shell\open	csrss.exe
Key created	\REGISTRY\MACHINE\Software\Classes\irc\Shell\open\ddeexec	csrss.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\irc\Shell\open\ddeexec\Application\ = "mIRC"	csrss.exe
Key created	\REGISTRY\MACHINE\Software\Classes\irc\Shell\open\ddeexec\Topic	csrss.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\ChatFile\DefaultIcon\ = "\"C:\\RECYCLER\\S-1-5-21-3252328098-71414409-2463015037-501\\csrss.exe\""	csrss.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\ChatFile\Shell\open\ddeexec\ifexec	csrss.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\irc\URL Protocol	csrss.exe
Key created	\REGISTRY\MACHINE\Software\Classes\irc\Shell\open\command	csrss.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2540	csrss.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2540	csrss.exe
2540	csrss.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4856 wrote to memory of 2540	4856	5b906587a5be3427f67fbebf8c52743a.exe	26
PID 4856 wrote to memory of 2540	4856	5b906587a5be3427f67fbebf8c52743a.exe	26
PID 4856 wrote to memory of 2540	4856	5b906587a5be3427f67fbebf8c52743a.exe	26
PID 2540 wrote to memory of 4420	2540	csrss.exe	24
PID 2540 wrote to memory of 4420	2540	csrss.exe	24
PID 2540 wrote to memory of 4420	2540	csrss.exe	24

C:\Users\Admin\AppData\Local\Temp\5b906587a5be3427f67fbebf8c52743a.exe
"C:\Users\Admin\AppData\Local\Temp\5b906587a5be3427f67fbebf8c52743a.exe"
1⤵
- Checks computer location settings
- Drops desktop.ini file(s)
- Suspicious use of WriteProcessMemory
PID:4856
- C:\RECYCLER\S-1-5-21-3252328098-71414409-2463015037-501\csrss.exe
  "C:\RECYCLER\S-1-5-21-3252328098-71414409-2463015037-501\csrss.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Modifies registry class
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2540

C:\RECYCLER\S-1-5-21-3252328098-71414409-2463015037-501\hex.exe
"C:\RECYCLER\S-1-5-21-3252328098-71414409-2463015037-501\hex.exe" "mIRC DB" /hide
1⤵
- Executes dropped EXE
PID:4420

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

Loading Replay Monitor...

Downloads

C:\RECYCLER\S-1-5-21-3252328098-71414409-2463015037-501\csrss.exe

Filesize
382KB

MD5
fa7844b2d33b7de2a43aaaab7b45a8d6

SHA1
e6b0382314af628c50062c6d06796db7a4c39c5a

SHA256
acaf46f5c60ed07be6c1ce793fe2d4e3186e67cf33408443ab5195caa1ebfd6e

SHA512
722ea7ae8af9b7dcb7ae77248bc523f91f5f7a06670c0e08c649286315e98964c3e70bc50283d09528b7fee9d4316c76b4e1d170632807f47740ad989661948f

Download Submit
C:\RECYCLER\S-1-5-21-3252328098-71414409-2463015037-501\csrss.exe

Filesize
385KB

MD5
3a2414627862990a76549396c1ce38b4

SHA1
8e239a9861a051edba86655eb23c795e6f36a229

SHA256
8979f3f9344d04657a18d2c3dfd1061b0531691dd34f7b37d11bedb030bc5ec7

SHA512
679a6ae147f2cafff9459b7a8e479320d617784bfffe21421f2dd6e666c4fd2f2722c897714d5197e2999d1b317999d0cc25719b0a39a53efbbbe6979050f11d

Download Submit
C:\RECYCLER\S-1-5-21-3252328098-71414409-2463015037-501\mirc.ini

Filesize
3KB

MD5
d5d0e5f644d304d56ae351d63cc59bc9

SHA1
987adb5fcb36a28be1440f814592c28b71cf49a6

SHA256
1d1c9ba032acec40b3a7ddaeb3fedfc94d2d2599b88279967b72a725e0833a0b

SHA512
3dcce470e2bd50eedaf58a48ee2252e7ddca86f0c422a9379bb15ae613215bef87e9815675ddf04ccc944002d17318ffd13225dc0b7aded4f955d348500297cd

Download Submit
C:\RECYCLER\S-1-5-21-3252328098-71414409-2463015037-501\mirc.ini

Filesize
3KB

MD5
752b13a1dd169e9187eb4d1c1cf8ef1c

SHA1
376ca17e39d2d6c02de9755f5783bae30c2dd4e7

SHA256
cca7f582fd39579914a33128e812eca9d62222f0fbb7df4844c49ac62c60f2b2

SHA512
aa89e65e343ee13e85311b9de93cc3dcd629e22dac9edd95fa72e8ce6282ca5b168fa4cdee2f7b10282962c9402a4e67398de9940497628e569d5654313502c5

Download Submit
C:\RECYCLER\S-1-5-21-3252328098-71414409-2463015037-501\mirc.ini

Filesize
3KB

MD5
99a926addb963454a825f4608c6ef9b7

SHA1
9580376f6de1198048188e1abdf7ff65dcca55cb

SHA256
b91ba84088b063955a592a8b2a555db2f9ae54d94c5c23fd8e11920f44798d3d

SHA512
daa1b53f7be9534ac8025d9b28a4f358d5ad5692b6c6ca857c3ca2a9789a94ea2979345db18f018f7090570e75a4102297beee1326155dc74a77122b74cae73e

Download Submit
C:\RECYCLER\S-1-5-21-3252328098-71414409-2463015037-501\mirc.ini

Filesize
3KB

MD5
94409b620e552590722350376a6d7c6f

SHA1
27671e2ceadd3509e2d62c5e9a2e6348f1f4b559

SHA256
c9659d2342a0cfb7a16228b9b5eace37d8034771d1dcdd135a2f2f435820be30

SHA512
feba0a176606915b6ac1e8b47e36de3b97aea6ae82af131fa4c0674571d217fbc2efb02654eea532e2f2778f71b76e3a56fdcc0a2abe6c254c01020309518486

Download Submit
C:\RECYCLER\S-1-5-21-3252328098-71414409-2463015037-501\users.ini

Filesize
353B

MD5
0e7428e05c5b7e7e503ab74abd34bca8

SHA1
488b4b656ca04ffa43d5947aec434d4355aef3b7

SHA256
85aa176c46a06782a8328d37f9a90d39852d5c998c404b57a9c2e9374600244a

SHA512
8b160566d196eec86c2211de5d8817def61b2b3e7151f8c1fda3a8b67a2ef768df91f43f861f8c2ce27dc85a7ffb1fe96390da540ef3bad770366ea25fc1ed33

Download Submit
memory/2540-41-0x0000000000400000-0x00000000005C6000-memory.dmp

Filesize
1.8MB

Download
memory/2540-397-0x0000000000400000-0x00000000005C6000-memory.dmp

Filesize
1.8MB

Download
memory/2540-390-0x0000000000400000-0x00000000005C6000-memory.dmp

Filesize
1.8MB

Download
memory/2540-382-0x0000000000400000-0x00000000005C6000-memory.dmp

Filesize
1.8MB

Download
memory/2540-364-0x0000000000400000-0x00000000005C6000-memory.dmp

Filesize
1.8MB

Download
memory/2540-360-0x0000000000400000-0x00000000005C6000-memory.dmp

Filesize
1.8MB

Download
memory/2540-375-0x0000000000400000-0x00000000005C6000-memory.dmp

Filesize
1.8MB

Download
memory/2540-371-0x0000000000400000-0x00000000005C6000-memory.dmp

Filesize
1.8MB

Download
memory/2540-402-0x0000000000400000-0x00000000005C6000-memory.dmp

Filesize
1.8MB

Download
memory/2540-409-0x0000000000400000-0x00000000005C6000-memory.dmp

Filesize
1.8MB

Download
memory/2540-413-0x0000000000400000-0x00000000005C6000-memory.dmp

Filesize
1.8MB

Download
memory/2540-416-0x0000000000400000-0x00000000005C6000-memory.dmp

Filesize
1.8MB

Download
memory/2540-424-0x0000000000400000-0x00000000005C6000-memory.dmp

Filesize
1.8MB

Download
memory/2540-386-0x0000000000400000-0x00000000005C6000-memory.dmp

Filesize
1.8MB

Download
memory/2540-428-0x0000000000400000-0x00000000005C6000-memory.dmp

Filesize
1.8MB

Download
memory/4856-40-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download