ermac | ee4e51d79931f393c083ddb8886146e664800e24d7e48a034bf1fb36de6aab00

General

Target

ee4e51d79931f393c083ddb8886146e664800e24d7e48a034bf1fb36de6aab00.apk
Size

1.7MB
MD5

f6410e769a8ac7c169140de9dfdf908f
SHA1

fb2aab1d56cd428ec9169dbfd6c7457c55a11d5f
SHA256

ee4e51d79931f393c083ddb8886146e664800e24d7e48a034bf1fb36de6aab00
SHA512

cd9a233f3879db0689738593a617e7668ec4b5b3341245860d8bced1ef93dcb3bd599b8ed87d96354ace17d5c1b470aa98910f264cb5a6b847a8e64bd8471a1c
SSDEEP

49152:F3cFfiZbL4xdL3lsCI4kyVRzkmVG4nZegSO:F3cw4xtWwRz7o4Zp

Score

10^/10

ermac hook banker defense_evasion discovery evasion execution impact infostealer persistence rat trojan

Malware Config

Extracted

Family

ermac

C2

http://154.90.62.12

AES_key

Extracted

Family

hook

C2

http://154.90.62.12

AES_key

Signatures

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

Ermac2 payload 1 IoCs

resource	yara_rule
behavioral1/memory/4258-0.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 1 IoCs

Runs executable file dropped to the device during analysis.

evasion

Download New Code at Runtime

T1407

ioc	pid	Process
Anonymous-DexFile@0xd1d75000-0xd1f7fb98	4258	com.tencent.mm

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

Acquires the wake lock 1 IoCs

description	ioc	Process
Framework service call	android.os.IPowerManager.acquireWakeLock	com.tencent.mm

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.

defense_evasion persistence

Foreground Persistence

T1541

description	ioc	Process
Framework service call	android.app.IActivityManager.setServiceForeground	com.tencent.mm

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.tencent.mm

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.tencent.mm

Reads information about phone network operator. 1 TTPs
discovery

System Network Configuration Discovery
T1422

Requests disabling of battery optimizations (often used to enable hiding in the background). 1 TTPs 1 IoCs

defense_evasion

User Evasion

T1628.002

description	ioc	Process
Intent action	android.settings.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS	com.tencent.mm

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.tencent.mm

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.tencent.mm

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.tencent.mm

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.tencent.mm

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.tencent.mm

com.tencent.mm
1⤵
- Loads dropped Dex/Jar
- Acquires the wake lock
- Makes use of the framework's foreground persistence service
- Queries information about the current Wi-Fi connection
- Queries the mobile country code (MCC)
- Requests disabling of battery optimizations (often used to enable hiding in the background).
- 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:4258

Network

MITRE ATT&CK Mobile v15

Initial Access

Execution

Scheduled Task/Job

1

T1603

Persistence

Event Triggered Execution

1

T1624

Broadcast Receivers

1

T1624.001

Foreground Persistence

Scheduled Task/Job

Privilege Escalation

Defense Evasion

Download New Code at Runtime

1

T1407

Foreground Persistence

1

T1541

Hide Artifacts

1

T1628

User Evasion

1

T1628.002

Virtualization/Sandbox Evasion

2

T1633

System Checks

2

T1633.001

Credential Access

Discovery

Software Discovery

1

T1418

Security Software Discovery

1

T1418.001

System Information Discovery

2

T1426

System Network Configuration Discovery

2

T1422

System Network Connections Discovery

1

T1421

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Data Encrypted for Impact

1

T1471

Replay Monitor

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Downloads

/data/data/com.tencent.mm/.jiagu/libjiaguv1.so

Filesize
314KB

MD5
88a96c5aa2fd43fed11bc82d9f33261c

SHA1
8f7555f2a7e7341ff6de1f26e74643771445d33d

SHA256
bc0fe685977f98b0726b76e9b59368c295ee15e6b546c819f91e49adfb5ca432

SHA512
9835357f4d1b630a229ee0e5fec55b92c32e9225f428d6ebe59ee18d8fe8bf1cf7f6d3158346ef669bc5f9411b6ee4d382675476c32d1afb50e31be92b5b2c2d

Download Submit
/data/data/com.tencent.mm/no_backup/androidx.work.workdb

Filesize
4KB

MD5
f2b4b0190b9f384ca885f0c8c9b14700

SHA1
934ff2646757b5b6e7f20f6a0aa76c7f995d9361

SHA256
0a8ffb6b327963558716e87db8946016d143e39f895fa1b43e95ba7032ce2514

SHA512
ec12685fc0d60526eed4d38820aad95611f3e93ae372be5a57142d8e8a1ba17e6e5dfe381a4e1365dddc0b363c9c40daaffdc1245bd515fddac69bf1abacd7f1

Download Submit
/data/data/com.tencent.mm/no_backup/androidx.work.workdb-journal

Filesize
512B

MD5
00c9e5d003cd03e19e078860b3097b40

SHA1
70df88afa5dd1625421351146de2efdb7efd908b

SHA256
bcd0c18e9277336bcecfed0e6d41e9150891a26bb95304ba27586f15a163a7c1

SHA512
76362e553f3ee94ebd3d49fdaa0b6dd4af590ea4f7aed649d25cb27f7abd0658d5f63eb38fc12c24ae90b9a1635bb752a881342078a35050d7ab65fc3d986616

Download Submit
/data/data/com.tencent.mm/no_backup/androidx.work.workdb-shm

Filesize
32KB

MD5
bb7df04e1b0a2570657527a7e108ae23

SHA1
5188431849b4613152fd7bdba6a3ff0a4fd6424b

SHA256
c35020473aed1b4642cd726cad727b63fff2824ad68cedd7ffb73c7cbd890479

SHA512
768007e06b0cd9e62d50f458b9435c6dda0a6d272f0b15550f97c478394b743331c3a9c9236e09ab5b9cb3b423b2320a5d66eb3c7068db9ea37891ca40e47012

Download Submit
/data/data/com.tencent.mm/no_backup/androidx.work.workdb-wal

Filesize
16KB

MD5
094668659f958d90d795076850af65fa

SHA1
c90798bbe972bb79d28c1efb09ba65673b4659e2

SHA256
ace48c131ac02eeb038744f0fba57fac78d8a8b2dcc6388366e5283ebfe1c299

SHA512
4e98b96112dcd03bfecc33a991de0bfc0e00b5bcc61ade311eb531840e9ce3e4e60679c2c1bb2cc3fbd64e048e29bc415c3ca419be76ef0d27d17a571c54cc1e

Download Submit
/data/data/com.tencent.mm/no_backup/androidx.work.workdb-wal

Filesize
112KB

MD5
41f59ef211c54bbd223fca454babcb3c

SHA1
d04d0ec0077a8606230ea7ec4d7b826c423ab4af

SHA256
eaa670c4c862839c11eb2b5fe61ab646d580719b730b0141db8681fe53ca8fd9

SHA512
2333dfb142a66b53d75e26f8c1d26ef0c026248b7e16dc8dea7b4ab1ac96c721f1e03a0d26dde13ab96f6ffdd182b810ee675c4f7a257a563125246bdfb3ee80

Download Submit
/data/data/com.tencent.mm/no_backup/androidx.work.workdb-wal

Filesize
185KB

MD5
8518942715274b202715cd2745c4eda4

SHA1
45891f560ee9fa2815584782721a2944c7283e1a

SHA256
19fc5a8ffefc95db2e693979d97c35f46bc32794a4eab11ac9d6725f38b51856

SHA512
91d4091570303831ec5af727cfca256e0ad9cf5445f27cc32a71303f253b763d4032ed920c94f28434ec7f757a9c9e27b93a1fe99eb87fc82c0025e36ee82ecb

Download Submit
Anonymous-DexFile@0xd1d75000-0xd1f7fb98

Filesize
2.0MB

MD5
40cb56a4d76414296a84bfed60b6c127

SHA1
6b2a5132dd77022708b2b9959737f8377a93a465

SHA256
9364ddf46fe1bf90cebac61bc7cbba8707de8158ce444a8fb43220dd50d0699d

SHA512
ea743dbf8e188e17589a443c49bbd07d5ebef8edd8a02b40f32bdd9fdbfcdcc63e298f6c4cbd27cfcd9033fc9382b30b0c5fec3e60e400f2dca34a40f5815a02

Download Submit

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Mobile v15

Replay Monitor

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Downloads