oski | 9b3da318b86a4bf8b36aca1ea75841e5fc03a57eb500d3379847573e7546a4c4

Analysis

max time kernel
66s
max time network
69s
platform
windows7_x64
resource
win7v20201028
submitted
06-11-2020 11:02

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General

Target

9b3da318b86a4bf8b36aca1ea75841e5fc03a57eb500d3379847573e7546a4c4.exe
Size

449KB
MD5

f20f5ad4b8d13a4fb00275480075d145
SHA1

0d97a9ec2707a86144836765a64a91e9a04f08ae
SHA256

9b3da318b86a4bf8b36aca1ea75841e5fc03a57eb500d3379847573e7546a4c4
SHA512

cac8ac52eb088448db62b4880917e14214f52d6e8492618145cf87cb3a2771352e554107a6ed184eb5e9fcfd9fe730d5ac92a37c7f4801dd37f7ed76cccc367b

Score

10^/10

oski stormkitty discovery infostealer spyware stealer vmprotect

Malware Config

Extracted

Family

oski

web24host.com/a/a/www/

Signatures

Oski
Oski is an infostealer targeting browser data, crypto wallets.
infostealer oski
StormKitty
StormKitty is an open source info stealer written in C#.
stealer stormkitty

StormKitty Payload 4 IoCs

Processes:

resource	yara_rule
\Users\Admin\AppData\Local\Temp\Chromuim.exe	family_stormkitty
C:\Users\Admin\AppData\Local\Temp\Chromuim.exe	family_stormkitty
C:\Users\Admin\AppData\Local\Temp\Chromuim.exe	family_stormkitty
behavioral1/memory/2032-12-0x0000000002550000-0x00000000025C0000-memory.dmp	family_stormkitty

Downloads MZ/PE file
Executes dropped EXE 2 IoCs

Processes:

Chromuim.exeCmd.com

pid process

2032 Chromuim.exe
1220 Cmd.com

pid	process
2032	Chromuim.exe
1220	Cmd.com

VMProtect packed file 1 IoCs

Detects executables packed with VMProtect commercial packer.

vmprotect

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\AnonFileApi.dll	vmprotect

Loads dropped DLL 8 IoCs

Processes:

9b3da318b86a4bf8b36aca1ea75841e5fc03a57eb500d3379847573e7546a4c4.exeCmd.com

pid	process
1628	9b3da318b86a4bf8b36aca1ea75841e5fc03a57eb500d3379847573e7546a4c4.exe
1628	9b3da318b86a4bf8b36aca1ea75841e5fc03a57eb500d3379847573e7546a4c4.exe
1628	9b3da318b86a4bf8b36aca1ea75841e5fc03a57eb500d3379847573e7546a4c4.exe
1220	Cmd.com
1220	Cmd.com
1220	Cmd.com
1220	Cmd.com
1220	Cmd.com

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081
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
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

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

System Information Discovery
T1082
Checks processor information in registry 2 TTPs 1 IoCs
Processor information is often read in order to detect sandboxing environments.

Query Registry
T1012

System Information Discovery
T1082

Processes:

Cmd.com

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString Cmd.com
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

1000 timeout.exe
Kills process with taskkill 2 IoCs
evasion

Processes:

taskkill.exetaskkill.exe

pid process

620 taskkill.exe
784 taskkill.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

Chromuim.exe

pid process

2032 Chromuim.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

Chromuim.exetaskkill.exetaskkill.exe

description pid process

Token: SeDebugPrivilege 2032 Chromuim.exe
Token: SeDebugPrivilege 784 taskkill.exe
Token: SeDebugPrivilege 620 taskkill.exe

flow	ioc
7	ip-api.com

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	Cmd.com

pid	process
1000	timeout.exe

pid	process
620	taskkill.exe
784	taskkill.exe

pid	process
2032	Chromuim.exe

description	pid	process
Token: SeDebugPrivilege	2032	Chromuim.exe
Token: SeDebugPrivilege	784	taskkill.exe
Token: SeDebugPrivilege	620	taskkill.exe

Suspicious use of WriteProcessMemory 37 IoCs

Processes:

9b3da318b86a4bf8b36aca1ea75841e5fc03a57eb500d3379847573e7546a4c4.exeCmd.comcmd.exeChromuim.execmd.exe

description	pid	process	target process
PID 1628 wrote to memory of 2032	1628	9b3da318b86a4bf8b36aca1ea75841e5fc03a57eb500d3379847573e7546a4c4.exe	Chromuim.exe
PID 1628 wrote to memory of 2032	1628	9b3da318b86a4bf8b36aca1ea75841e5fc03a57eb500d3379847573e7546a4c4.exe	Chromuim.exe
PID 1628 wrote to memory of 2032	1628	9b3da318b86a4bf8b36aca1ea75841e5fc03a57eb500d3379847573e7546a4c4.exe	Chromuim.exe
PID 1628 wrote to memory of 2032	1628	9b3da318b86a4bf8b36aca1ea75841e5fc03a57eb500d3379847573e7546a4c4.exe	Chromuim.exe
PID 1628 wrote to memory of 1220	1628	9b3da318b86a4bf8b36aca1ea75841e5fc03a57eb500d3379847573e7546a4c4.exe	Cmd.com
PID 1628 wrote to memory of 1220	1628	9b3da318b86a4bf8b36aca1ea75841e5fc03a57eb500d3379847573e7546a4c4.exe	Cmd.com
PID 1628 wrote to memory of 1220	1628	9b3da318b86a4bf8b36aca1ea75841e5fc03a57eb500d3379847573e7546a4c4.exe	Cmd.com
PID 1628 wrote to memory of 1220	1628	9b3da318b86a4bf8b36aca1ea75841e5fc03a57eb500d3379847573e7546a4c4.exe	Cmd.com
PID 1628 wrote to memory of 1220	1628	9b3da318b86a4bf8b36aca1ea75841e5fc03a57eb500d3379847573e7546a4c4.exe	Cmd.com
PID 1628 wrote to memory of 1220	1628	9b3da318b86a4bf8b36aca1ea75841e5fc03a57eb500d3379847573e7546a4c4.exe	Cmd.com
PID 1628 wrote to memory of 1220	1628	9b3da318b86a4bf8b36aca1ea75841e5fc03a57eb500d3379847573e7546a4c4.exe	Cmd.com
PID 1220 wrote to memory of 1524	1220	Cmd.com	cmd.exe
PID 1220 wrote to memory of 1524	1220	Cmd.com	cmd.exe
PID 1220 wrote to memory of 1524	1220	Cmd.com	cmd.exe
PID 1220 wrote to memory of 1524	1220	Cmd.com	cmd.exe
PID 1220 wrote to memory of 1524	1220	Cmd.com	cmd.exe
PID 1220 wrote to memory of 1524	1220	Cmd.com	cmd.exe
PID 1220 wrote to memory of 1524	1220	Cmd.com	cmd.exe
PID 1524 wrote to memory of 784	1524	cmd.exe	taskkill.exe
PID 1524 wrote to memory of 784	1524	cmd.exe	taskkill.exe
PID 1524 wrote to memory of 784	1524	cmd.exe	taskkill.exe
PID 1524 wrote to memory of 784	1524	cmd.exe	taskkill.exe
PID 1524 wrote to memory of 784	1524	cmd.exe	taskkill.exe
PID 1524 wrote to memory of 784	1524	cmd.exe	taskkill.exe
PID 1524 wrote to memory of 784	1524	cmd.exe	taskkill.exe
PID 2032 wrote to memory of 1300	2032	Chromuim.exe	cmd.exe
PID 2032 wrote to memory of 1300	2032	Chromuim.exe	cmd.exe
PID 2032 wrote to memory of 1300	2032	Chromuim.exe	cmd.exe
PID 1300 wrote to memory of 636	1300	cmd.exe	chcp.com
PID 1300 wrote to memory of 636	1300	cmd.exe	chcp.com
PID 1300 wrote to memory of 636	1300	cmd.exe	chcp.com
PID 1300 wrote to memory of 620	1300	cmd.exe	taskkill.exe
PID 1300 wrote to memory of 620	1300	cmd.exe	taskkill.exe
PID 1300 wrote to memory of 620	1300	cmd.exe	taskkill.exe
PID 1300 wrote to memory of 1000	1300	cmd.exe	timeout.exe
PID 1300 wrote to memory of 1000	1300	cmd.exe	timeout.exe
PID 1300 wrote to memory of 1000	1300	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\9b3da318b86a4bf8b36aca1ea75841e5fc03a57eb500d3379847573e7546a4c4.exe
"C:\Users\Admin\AppData\Local\Temp\9b3da318b86a4bf8b36aca1ea75841e5fc03a57eb500d3379847573e7546a4c4.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1628

C:\Users\Admin\AppData\Local\Temp\Chromuim.exe
"C:\Users\Admin\AppData\Local\Temp\Chromuim.exe"
2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2032

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /C C:\Users\Admin\AppData\Local\Temp\tmpBD20.tmp.bat
3⤵
- Suspicious use of WriteProcessMemory
PID:1300

C:\Windows\system32\chcp.com
chcp 65001
4⤵
PID:636

C:\Windows\system32\taskkill.exe
TaskKill /F /IM 2032
4⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:620

C:\Windows\system32\timeout.exe
Timeout /T 2 /Nobreak
4⤵
- Delays execution with timeout.exe
PID:1000

C:\Users\Admin\AppData\Local\Temp\Cmd.com
"C:\Users\Admin\AppData\Local\Temp\Cmd.com"
2⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:1220

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c taskkill /pid 1220 & erase C:\Users\Admin\AppData\Local\Temp\Cmd.com & RD /S /Q C:\\ProgramData\\906150434483872\\* & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:1524

C:\Windows\SysWOW64\taskkill.exe
taskkill /pid 1220
4⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:784

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\AnonFileApi.dll
MD5
7a2d5deab61f043394a510f4e2c0866f

SHA1
ca16110c9cf6522cd7bea32895fd0f697442849b

SHA256
75db945388f62f2de3d3eaae911f49495f289244e2fec9b25455c2d686989f69

SHA512
b66b0bf227762348a5ede3c2578d5bc089c222f632a705241bcc63d56620bef238c67ca2bd400ba7874b2bc168e279673b0e105b73282bc69aa21a7fd34bafe0

Download Submit
C:\Users\Admin\AppData\Local\Temp\Chromuim.exe
MD5
d154acc5b5bd9966bb5baf6e7b8ffed7

SHA1
d89e203019c395aa42d12168341cc389235fdbee

SHA256
b771e39c8fb6bacc01a0b8762cf8ed65dde6a077abe4da4492d94d9baa3469f8

SHA512
1aa5d73e0f05c8827e2a3bfb9143d28b13b0ceea3d161972a7a513191c11e04c802d2b66d902712595a3a493494df77ea599a2ecab5259e51cd29cb9abc16bea

Download Submit
C:\Users\Admin\AppData\Local\Temp\Chromuim.exe
MD5
d154acc5b5bd9966bb5baf6e7b8ffed7

SHA1
d89e203019c395aa42d12168341cc389235fdbee

SHA256
b771e39c8fb6bacc01a0b8762cf8ed65dde6a077abe4da4492d94d9baa3469f8

SHA512
1aa5d73e0f05c8827e2a3bfb9143d28b13b0ceea3d161972a7a513191c11e04c802d2b66d902712595a3a493494df77ea599a2ecab5259e51cd29cb9abc16bea

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cmd.com
MD5
94835b6d4af91fc977e840d64adaa485

SHA1
77635f373780022f21f74ade8ee80d0e652248ed

SHA256
9e2455642e046af82e21bdc6bc8659a5acc10796e383dcd7064227b0e8c6675b

SHA512
c1ff6e810d1f3476e635a206ef7b9e762230e29a0608cb961df6931d415315e1661277f2cebb2bdd15ef8291c5adae7311f97f0690aefea8fc4a3af1665d779a

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cmd.com
MD5
94835b6d4af91fc977e840d64adaa485

SHA1
77635f373780022f21f74ade8ee80d0e652248ed

SHA256
9e2455642e046af82e21bdc6bc8659a5acc10796e383dcd7064227b0e8c6675b

SHA512
c1ff6e810d1f3476e635a206ef7b9e762230e29a0608cb961df6931d415315e1661277f2cebb2bdd15ef8291c5adae7311f97f0690aefea8fc4a3af1665d779a

Download Submit
C:\Users\Admin\AppData\Local\Temp\DotNetZip.dll
MD5
6d1c62ec1c2ef722f49b2d8dd4a4df16

SHA1
1bb08a979b7987bc7736a8cfa4779383cb0ecfa6

SHA256
00da1597d92235d3f84da979e2fa5dbf049bafb52c33bd6fc8ee7b29570c124c

SHA512
c0dce8eaa52eb6c319d4be2eec4622bb3380c65b659cfb77ff51a4ada7d3e591e791ee823dad67b5556ffac5c060ff45d09dd1cc21baaf70ba89806647cb3bd2

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpBD20.tmp.bat
MD5
bdc6b4d4b6e98ede6587daac74983cc1

SHA1
e2ab16be716152ddb86978c2f8645a0ff40c632e

SHA256
1f535efa54aad6412c8abe482099c30814869ffbde0e0b850dde7ffa051c809a

SHA512
2f2e131e4e92a75a0e6c373e4e537bde48fb2dc28488b669ac73a3b05123ae95ef088fd85d0013313eaa2583531ea21820bdd8276b35d5890a8dea08570e8f62

Download Submit
\ProgramData\mozglue.dll
MD5
8f73c08a9660691143661bf7332c3c27

SHA1
37fa65dd737c50fda710fdbde89e51374d0c204a

SHA256
3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

SHA512
0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

Download Submit
\ProgramData\msvcp140.dll
MD5
109f0f02fd37c84bfc7508d4227d7ed5

SHA1
ef7420141bb15ac334d3964082361a460bfdb975

SHA256
334e69ac9367f708ce601a6f490ff227d6c20636da5222f148b25831d22e13d4

SHA512
46eb62b65817365c249b48863d894b4669e20fcb3992e747cd5c9fdd57968e1b2cf7418d1c9340a89865eadda362b8db51947eb4427412eb83b35994f932fd39

Download Submit
\ProgramData\nss3.dll
MD5
bfac4e3c5908856ba17d41edcd455a51

SHA1
8eec7e888767aa9e4cca8ff246eb2aacb9170428

SHA256
e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

SHA512
2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

Download Submit
\ProgramData\sqlite3.dll
MD5
e477a96c8f2b18d6b5c27bde49c990bf

SHA1
e980c9bf41330d1e5bd04556db4646a0210f7409

SHA256
16574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660

SHA512
335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c

Download Submit
\ProgramData\vcruntime140.dll
MD5
7587bf9cb4147022cd5681b015183046

SHA1
f2106306a8f6f0da5afb7fc765cfa0757ad5a628

SHA256
c40bb03199a2054dabfc7a8e01d6098e91de7193619effbd0f142a7bf031c14d

SHA512
0b63e4979846ceba1b1ed8470432ea6aa18cca66b5f5322d17b14bc0dfa4b2ee09ca300a016e16a01db5123e4e022820698f46d9bad1078bd24675b4b181e91f

Download Submit
\Users\Admin\AppData\Local\Temp\Chromuim.exe
MD5
d154acc5b5bd9966bb5baf6e7b8ffed7

SHA1
d89e203019c395aa42d12168341cc389235fdbee

SHA256
b771e39c8fb6bacc01a0b8762cf8ed65dde6a077abe4da4492d94d9baa3469f8

SHA512
1aa5d73e0f05c8827e2a3bfb9143d28b13b0ceea3d161972a7a513191c11e04c802d2b66d902712595a3a493494df77ea599a2ecab5259e51cd29cb9abc16bea

Download Submit
\Users\Admin\AppData\Local\Temp\Cmd.com
MD5
94835b6d4af91fc977e840d64adaa485

SHA1
77635f373780022f21f74ade8ee80d0e652248ed

SHA256
9e2455642e046af82e21bdc6bc8659a5acc10796e383dcd7064227b0e8c6675b

SHA512
c1ff6e810d1f3476e635a206ef7b9e762230e29a0608cb961df6931d415315e1661277f2cebb2bdd15ef8291c5adae7311f97f0690aefea8fc4a3af1665d779a

Download Submit
\Users\Admin\AppData\Local\Temp\Cmd.com
MD5
94835b6d4af91fc977e840d64adaa485

SHA1
77635f373780022f21f74ade8ee80d0e652248ed

SHA256
9e2455642e046af82e21bdc6bc8659a5acc10796e383dcd7064227b0e8c6675b

SHA512
c1ff6e810d1f3476e635a206ef7b9e762230e29a0608cb961df6931d415315e1661277f2cebb2bdd15ef8291c5adae7311f97f0690aefea8fc4a3af1665d779a

Download Submit
memory/620-25-0x0000000000000000-mapping.dmp

Download
memory/636-24-0x0000000000000000-mapping.dmp

Download
memory/660-14-0x000007FEF6100000-0x000007FEF637A000-memory.dmp

Filesize
2.5MB

Download
memory/784-21-0x0000000000000000-mapping.dmp

Download
memory/1000-26-0x0000000000000000-mapping.dmp

Download
memory/1220-6-0x0000000000000000-mapping.dmp

Download
memory/1300-22-0x0000000000000000-mapping.dmp

Download
memory/1524-20-0x0000000000000000-mapping.dmp

Download
memory/2032-12-0x0000000002550000-0x00000000025C0000-memory.dmp

Filesize
448KB

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memory/2032-8-0x000007FEF5650000-0x000007FEF603C000-memory.dmp

Filesize
9.9MB

Download
memory/2032-10-0x000000013F430000-0x000000013F431000-memory.dmp

Filesize
4KB

Download
memory/2032-13-0x0000000000140000-0x0000000000141000-memory.dmp

Filesize
4KB

Download
memory/2032-1-0x0000000000000000-mapping.dmp

Download