oski | 8b0ac881b039733c573ab30cf037e0ce3d6f2981c0eb2342902b91ecf891adff

General

Target

SKBM-120821.exe
Size

732KB
MD5

807a927252237ee6436724cbbcd05fa0
SHA1

2344ad154e7d098704278cd5e28fccd29a9dec15
SHA256

a03b45dabcaf812402454befd876b2eafbdf9e967f3bb01e66f33f3cabbdebd5
SHA512

7f0bba03bd838900569e63bdab43e7caa3a1ab2d6744fcb9c38e7ca8914fcf31323b3db5d1ed2efdef1b5b5326f980c8712faef53ca6966c42318b20fd4bd541
SSDEEP

12288:SPqqPtYaerpyXOSs1vJhzl7txF3gSEyI32u6Yaer:wMrpW6vfl7hpE7mmr

Score

10^/10

oski infostealer spyware stealer

Malware Config

Extracted

Family

oski

C2

zau.divendesign.in

Signatures

Oski
Oski is an infostealer targeting browser data, crypto wallets.
infostealer oski

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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	SKBM-120821.exe

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
T1552.001

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3968 set thread context of 4304	3968	SKBM-120821.exe	105

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3484	4304	WerFault.exe	105

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
1536	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3968	SKBM-120821.exe
3968	SKBM-120821.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3968	SKBM-120821.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3968 wrote to memory of 1536	3968	SKBM-120821.exe	103
PID 3968 wrote to memory of 1536	3968	SKBM-120821.exe	103
PID 3968 wrote to memory of 1536	3968	SKBM-120821.exe	103
PID 3968 wrote to memory of 4304	3968	SKBM-120821.exe	105
PID 3968 wrote to memory of 4304	3968	SKBM-120821.exe	105
PID 3968 wrote to memory of 4304	3968	SKBM-120821.exe	105
PID 3968 wrote to memory of 4304	3968	SKBM-120821.exe	105
PID 3968 wrote to memory of 4304	3968	SKBM-120821.exe	105
PID 3968 wrote to memory of 4304	3968	SKBM-120821.exe	105
PID 3968 wrote to memory of 4304	3968	SKBM-120821.exe	105
PID 3968 wrote to memory of 4304	3968	SKBM-120821.exe	105
PID 3968 wrote to memory of 4304	3968	SKBM-120821.exe	105

C:\Users\Admin\AppData\Local\Temp\SKBM-120821.exe
"C:\Users\Admin\AppData\Local\Temp\SKBM-120821.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3968
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\rFmqUFUNsPfqc" /XML "C:\Users\Admin\AppData\Local\Temp\tmp64B0.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1536
- C:\Users\Admin\AppData\Local\Temp\SKBM-120821.exe
  "{path}"
  2⤵
  PID:4304
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4304 -s 1304
    3⤵
    - Program crash
    PID:3484

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1340 --field-trial-handle=2292,i,2103142837140538807,15881446839139365070,262144 --variations-seed-version /prefetch:8
1⤵
PID:1460

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 4304 -ip 4304
1⤵
PID:2276

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp64B0.tmp

Filesize
1KB

MD5
1beb7445d23a4c634a937eaa7cc15026

SHA1
953e765d8ccf852a4c6a6293c289fe380df69d3f

SHA256
ce3bd123d2f11c4ee3a0c94109d982dd4e0c25eda9a2f54b67ef3e2363421895

SHA512
35b3b70778b741bcb9d204ffc83044f9fd75be68cb13b471039eb19579c4ef29965166a8d3573eaf590869c0b37a3f380d152e470024b521c50b1a0b1210ad04

Download Submit
memory/3968-8-0x0000000005C40000-0x0000000005CC2000-memory.dmp

Filesize
520KB

Download
memory/3968-7-0x0000000005410000-0x0000000005420000-memory.dmp

Filesize
64KB

Download
memory/3968-3-0x0000000005280000-0x0000000005288000-memory.dmp

Filesize
32KB

Download
memory/3968-4-0x0000000005420000-0x00000000054BC000-memory.dmp

Filesize
624KB

Download
memory/3968-9-0x0000000005B50000-0x0000000005B8C000-memory.dmp

Filesize
240KB

Download
memory/3968-6-0x0000000074DC0000-0x0000000075570000-memory.dmp

Filesize
7.7MB

Download
memory/3968-2-0x0000000005410000-0x0000000005420000-memory.dmp

Filesize
64KB

Download
memory/3968-0-0x0000000074DC0000-0x0000000075570000-memory.dmp

Filesize
7.7MB

Download
memory/3968-5-0x00000000054C0000-0x0000000005552000-memory.dmp

Filesize
584KB

Download
memory/3968-1-0x0000000000790000-0x000000000084C000-memory.dmp

Filesize
752KB

Download
memory/3968-18-0x0000000074DC0000-0x0000000075570000-memory.dmp

Filesize
7.7MB

Download
memory/4304-14-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4304-15-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4304-17-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4304-13-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4304-21-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads