ermac | 913c3f5a4ac477a4d3b22828cb7b34c19bb483d76c9e34fea2c2c2a839bc6d6f

Analysis

max time kernel
128s
max time network
154s
platform
android_x86
resource
android-x86-arm-20240624-en
resource tags

androidarch:armarch:x86image:android-x86-arm-20240624-enlocale:en-usos:android-9-x86system
submitted
16-01-2025 04:18

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General

Target

913c3f5a4ac477a4d3b22828cb7b34c19bb483d76c9e34fea2c2c2a839bc6d6f.apk
Size

3.1MB
MD5

567b35b4761c2ba1d892138c301b1101
SHA1

64b8e8d590402ba162fa2e8c446ec30de33d6caa
SHA256

913c3f5a4ac477a4d3b22828cb7b34c19bb483d76c9e34fea2c2c2a839bc6d6f
SHA512

0a42739323f2daf57ddc6aaad9aac292573505477f64ce3c89fe60ccab3eca36e4efec3a3f339cc27fb47537cbdb91af9b384fbe1842d0dd2ad30432c37cdb7f
SSDEEP

98304:B05FVxjEHmnwGDKxlMMW7JUkk6dH8FMkw+/IzkCpht:BmxQGFDe+7Wtan+/Ixt

Score

10^/10

ermac hook banker collection credential_access discovery evasion execution impact infostealer persistence rat trojan

Malware Config

Extracted

Family

ermac

http://154.216.17.69

AES_key

Extracted

Family

hook

http://154.216.17.69

AES_key

Signatures

Ermac
An Android banking trojan first seen in July 2021.
banker trojan infostealer ermac
Ermac family
ermac

Ermac2 payload 2 IoCs

resource	yara_rule
behavioral1/memory/4273-0.dex	family_ermac2
behavioral1/memory/4247-0.dex	family_ermac2

Hook
Hook is an Android malware that is based on Ermac with RAT capabilities.
rat trojan infostealer hook
Hook family
hook

Loads dropped Dex/Jar 1 TTPs 2 IoCs

Runs executable file dropped to the device during analysis.

evasion

Download New Code at Runtime

T1407

ioc	pid	Process
/data/user/0/com.fsaslkasata.kuri/app_shed/LB.json	4273	/system/bin/dex2oat --instruction-set=x86 --instruction-set-features=ssse3,-sse4.1,-sse4.2,-avx,-avx2,-popcnt --runtime-arg -Xhidden-api-checks --runtime-arg -Xrelocate --boot-image=/system/framework/boot.art --runtime-arg -Xms64m --runtime-arg -Xmx512m --instruction-set-variant=x86 --instruction-set-features=default --inline-max-code-units=0 --compact-dex-level=none --dex-file=/data/user/0/com.fsaslkasata.kuri/app_shed/LB.json --output-vdex-fd=41 --oat-fd=42 --oat-location=/data/user/0/com.fsaslkasata.kuri/app_shed/oat/x86/LB.odex --compiler-filter=quicken --class-loader-context=&
/data/user/0/com.fsaslkasata.kuri/app_shed/LB.json	4247	com.fsaslkasata.kuri

Makes use of the framework's Accessibility service 4 TTPs 3 IoCs

Retrieves information displayed on the phone screen using AccessibilityService.

collection evasion credential_access

Input Injection

T1516

Screen Capture

T1513

Keylogging

T1417.001

GUI Input Capture

T1417.002

description	ioc	Process
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfoByAccessibilityId	com.fsaslkasata.kuri
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByText	com.fsaslkasata.kuri
Framework service call	android.accessibilityservice.IAccessibilityServiceConnection.findAccessibilityNodeInfosByViewId	com.fsaslkasata.kuri

Queries a list of all the installed applications on the device (Might be used in an attempt to overlay legitimate apps) 1 TTPs
banker discovery

Security Software Discovery
T1418.001

Queries information about running processes on the device 1 TTPs 1 IoCs

Application may abuse the framework's APIs to collect information about running processes on the device.

discovery

Process Discovery

T1424

description	ioc	Process
Framework service call	android.app.IActivityManager.getRunningAppProcesses	com.fsaslkasata.kuri

Queries the phone number (MSISDN for GSM devices) 1 TTPs
discovery

System Network Configuration Discovery
T1422

Acquires the wake lock 1 IoCs

description	ioc	Process
Framework service call	android.os.IPowerManager.acquireWakeLock	com.fsaslkasata.kuri

Makes use of the framework's foreground persistence service 1 TTPs 1 IoCs

Application may abuse the framework's foreground service to continue running in the foreground.

evasion persistence

Foreground Persistence

T1541

description	ioc	Process
Framework service call	android.app.IActivityManager.setServiceForeground	com.fsaslkasata.kuri

Performs UI accessibility actions on behalf of the user 1 TTPs 5 IoCs

Application may abuse the accessibility service to prevent their removal.

evasion

Prevent Application Removal

T1629.001

ioc	Process
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.fsaslkasata.kuri
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.fsaslkasata.kuri
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.fsaslkasata.kuri
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.fsaslkasata.kuri
android.accessibilityservice.IAccessibilityServiceConnection.performGlobalAction	com.fsaslkasata.kuri

Queries information about the current Wi-Fi connection 1 TTPs 1 IoCs

Application may abuse the framework's APIs to collect information about the current Wi-Fi connection.

discovery

System Network Connections Discovery

T1421

description	ioc	Process
Framework service call	android.net.wifi.IWifiManager.getConnectionInfo	com.fsaslkasata.kuri

Queries the mobile country code (MCC) 1 TTPs 1 IoCs

discovery

System Network Configuration Discovery

T1422

description	ioc	Process
Framework service call	com.android.internal.telephony.ITelephony.getNetworkCountryIsoForPhone	com.fsaslkasata.kuri

Registers a broadcast receiver at runtime (usually for listening for system events) 1 TTPs 1 IoCs

persistence

Broadcast Receivers

T1624.001

description	ioc	Process
Framework service call	android.app.IActivityManager.registerReceiver	com.fsaslkasata.kuri

Schedules tasks to execute at a specified time 1 TTPs 1 IoCs

Application may abuse the framework's APIs to perform task scheduling for initial or recurring execution of malicious code.

execution persistence

Scheduled Task/Job

T1603

description	ioc	Process
Framework service call	android.app.job.IJobScheduler.schedule	com.fsaslkasata.kuri

Uses Crypto APIs (Might try to encrypt user data) 1 TTPs 1 IoCs

impact

Data Encrypted for Impact

T1471

description	ioc	Process
Framework API call	javax.crypto.Cipher.doFinal	com.fsaslkasata.kuri

Checks CPU information 2 TTPs 1 IoCs

System Checks

T1633.001

System Information Discovery

T1426

description	ioc	Process
File opened for read	/proc/cpuinfo	com.fsaslkasata.kuri

Checks memory information 2 TTPs 1 IoCs

System Checks

T1633.001

System Information Discovery

T1426

description	ioc	Process
File opened for read	/proc/meminfo	com.fsaslkasata.kuri

com.fsaslkasata.kuri
1⤵
- Loads dropped Dex/Jar
- Makes use of the framework's Accessibility service
- Queries information about running processes on the device
- Acquires the wake lock
- Makes use of the framework's foreground persistence service
- Performs UI accessibility actions on behalf of the user
- Queries information about the current Wi-Fi connection
- Queries the mobile country code (MCC)
- Registers a broadcast receiver at runtime (usually for listening for system events)
- Schedules tasks to execute at a specified time
- Uses Crypto APIs (Might try to encrypt user data)
- Checks CPU information
- Checks memory information
PID:4247
- /system/bin/dex2oat --instruction-set=x86 --instruction-set-features=ssse3,-sse4.1,-sse4.2,-avx,-avx2,-popcnt --runtime-arg -Xhidden-api-checks --runtime-arg -Xrelocate --boot-image=/system/framework/boot.art --runtime-arg -Xms64m --runtime-arg -Xmx512m --instruction-set-variant=x86 --instruction-set-features=default --inline-max-code-units=0 --compact-dex-level=none --dex-file=/data/user/0/com.fsaslkasata.kuri/app_shed/LB.json --output-vdex-fd=41 --oat-fd=42 --oat-location=/data/user/0/com.fsaslkasata.kuri/app_shed/oat/x86/LB.odex --compiler-filter=quicken --class-loader-context=&
  2⤵
  - Loads dropped Dex/Jar
  PID:4273

Network

MITRE ATT&CK Mobile v15

Initial Access

Execution

Scheduled Task/Job

T1603

Persistence

Event Triggered Execution

T1624

Broadcast Receivers

T1624.001

Foreground Persistence

T1541

Scheduled Task/Job

T1603

Privilege Escalation

Defense Evasion

Download New Code at Runtime

T1407

Foreground Persistence

T1541

Impair Defenses

T1629

Prevent Application Removal

T1629.001

Input Injection

T1516

Virtualization/Sandbox Evasion

T1633

System Checks

T1633.001

Credential Access

Input Capture

T1417

GUI Input Capture

T1417.002

Keylogging

T1417.001

Discovery

Process Discovery

T1424

Software Discovery

T1418

Security Software Discovery

T1418.001

System Information Discovery

T1426

System Network Configuration Discovery

T1422

System Network Connections Discovery

T1421

Lateral Movement

Collection

Input Capture

T1417

GUI Input Capture

T1417.002

Keylogging

T1417.001

Screen Capture

T1513

Command and Control

Exfiltration

Impact

Data Encrypted for Impact

T1471

Input Injection

T1516

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Downloads

/data/data/com.fsaslkasata.kuri/app_shed/LB.json

Filesize
735KB

MD5
19dd9a04c41a4a5079fc0fd01a463cd9

SHA1
5bf4efd520550528535a60cb96f997777f89f172

SHA256
b95d00de087834af97723dcad42cd3e28185ce239e9ae422ed96c48c947015c5

SHA512
2cd3187a11af71bc660df9d51e63640dd5353d3b0936f226f4106e21f382e1799843f4ed6c8d87ce3b5fe72c190795476ff6d57be4e538e703bbfadd0e4de8c5

Download Submit
/data/data/com.fsaslkasata.kuri/app_shed/LB.json

Filesize
735KB

MD5
3d57a3bc0cc3f3bcea3bbabac2bf423d

SHA1
6e703b10c76e1cc8b2e85583383a00e42f56d4b4

SHA256
9cf0c3fe66a49d668c75a95b022592cd6815236f82d944cb9a472e0eeab36ca5

SHA512
e428afe928a93f2af1dbe82e88eef462e7beca5f0e268bb728c6da65273acdea37b1e65bc21b67e22a7a5d0ef74f7db06cd9c5daef8e298c98825171ebb1d892

Download Submit
/data/data/com.fsaslkasata.kuri/app_shed/oat/LB.json.cur.prof

Filesize
2KB

MD5
dd6d19fbe542f1ba43b009b829768c83

SHA1
bd90cb6b9d10296e760881db0c91a8b0b52e2fba

SHA256
36ba4edb46d185e04143aaf921d79899427a3019ca1735f6d685308265e74cc4

SHA512
00c3424a85d73347dcff4cb45fcc4f10f3965ed0a64f47c6cec37ee37e18263ded6929a7a8c891cb8c88f720e944778bf730a523123294588bcf0e255814e45c

Download Submit
/data/data/com.fsaslkasata.kuri/no_backup/androidx.work.workdb

Filesize
4KB

MD5
f2b4b0190b9f384ca885f0c8c9b14700

SHA1
934ff2646757b5b6e7f20f6a0aa76c7f995d9361

SHA256
0a8ffb6b327963558716e87db8946016d143e39f895fa1b43e95ba7032ce2514

SHA512
ec12685fc0d60526eed4d38820aad95611f3e93ae372be5a57142d8e8a1ba17e6e5dfe381a4e1365dddc0b363c9c40daaffdc1245bd515fddac69bf1abacd7f1

Download Submit
/data/data/com.fsaslkasata.kuri/no_backup/androidx.work.workdb-journal

Filesize
512B

MD5
52635077936241c08c774f171dd379f9

SHA1
ef0359fda6b99a57d0866bd0c46a6bbd409bacb9

SHA256
0f1f5e4dc4d8fc5a750ff46e90d04ef543d5f0fcb08e1c2bba506bac2b092116

SHA512
3871b41a656a275dc4b5003d290d3e89a4bcd9ff982182a58d1cfb7edccb8f53fb42df4368d79ede095cddbeda2217f8d94d2bf1a83815333aab998f51acf792

Download Submit
/data/data/com.fsaslkasata.kuri/no_backup/androidx.work.workdb-shm

Filesize
32KB

MD5
bb7df04e1b0a2570657527a7e108ae23

SHA1
5188431849b4613152fd7bdba6a3ff0a4fd6424b

SHA256
c35020473aed1b4642cd726cad727b63fff2824ad68cedd7ffb73c7cbd890479

SHA512
768007e06b0cd9e62d50f458b9435c6dda0a6d272f0b15550f97c478394b743331c3a9c9236e09ab5b9cb3b423b2320a5d66eb3c7068db9ea37891ca40e47012

Download Submit
/data/data/com.fsaslkasata.kuri/no_backup/androidx.work.workdb-wal

Filesize
108KB

MD5
e4e31f1c6351e034d15048466f040ddc

SHA1
bc75dceca10245012e7d90361972d27b2342f1e9

SHA256
1fc2d83e35e535abf679e141830acd61b86449333019507311ac7e6f77990f3d

SHA512
c0bb1c8a5d496440e7c4bce1d3e1acf945191f127d5a69e8a014d0e336a6570835c602c891a29e5a2f218a61df48f17e4e1e4482e391b4a2b9a28a29bbe4c066

Download Submit
/data/data/com.fsaslkasata.kuri/no_backup/androidx.work.workdb-wal

Filesize
173KB

MD5
68d9d0d730d863b4521a534b36670719

SHA1
fabad6d8beefcfb41f01359eeb044211e1885469

SHA256
770b499e11638c3ed018ce1785562f51c2151a4a9c5f4f094322e03e26b8dcec

SHA512
67c56aa59096c59cce319940f4964899f2188eeb5fa15ed06286809821e223f822210bdb7aa3aa1ea8bd2a247f43d747b0ced99a49d68053d8edf63ce6a9a81f

Download Submit
/data/data/com.fsaslkasata.kuri/no_backup/androidx.work.workdb-wal

Filesize
16KB

MD5
32e01bcea40ed1bbf6cabb454eb90ebc

SHA1
6af5794fb91bafa1f21dcfd3f3f73c5f182b1393

SHA256
025d1f269076ed05d45d1ff06d481e4378e063c7f9ce72dc767d4d1162df6aae

SHA512
88c035d2e6f1c7490fa1879353bed7a6f4de1a837ba7631daf0a1ca04ebae2daa60d55575542dab1db0d577346deae430aa79b4e4ca74a742cf16d05cd33a520

Download Submit
/data/user/0/com.fsaslkasata.kuri/app_shed/LB.json

Filesize
1.7MB

MD5
1a767207b9f279b066ee528e6fbb55e0

SHA1
83737766ec897e392d349f5214908d501f506a94

SHA256
73df73b48a9a51618d9628529b88b41a44a1c213804df7fc1c80b56e740ae0fc

SHA512
6a69ac352648ec3e990185d5e74dd3aa0116e9e18ca6523a973af72bb88c69fc8b12d65d2344832b9185cf4aca12ad58a5c6bfd57ffcbf0c98c8f555fa733a5e

Download Submit
/data/user/0/com.fsaslkasata.kuri/app_shed/LB.json

Filesize
1.7MB

MD5
9eccb01fd5e6aa747a3b8fcb38173340

SHA1
77a21894421bbbe4ae767c9b56150c22a380f86a

SHA256
3163ad11d263490feeabaf6d1e83a9cd4f5466a031cc012c02bee0212edd09e3

SHA512
740be2e7273890531c52d94be49ec71ec7045fd38cfcfd6330951125996266832ed2ac13369d18931e8659b251149f3793a3e1f8c66a8b457063b2083c1788e2

Download Submit

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Mobile v15

Replay Monitor

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Downloads