nymaim | b248366303d84a892d54d2a3bfcf5a4642c20be9b00bf6402336c295ac18f025

General

Target

file.exe
Size

2.2MB
MD5

691997b3c6129ff2dba13300f8f6e2c0
SHA1

bdc28d73205b1121b4a25e19b246fe8cb928cc84
SHA256

b248366303d84a892d54d2a3bfcf5a4642c20be9b00bf6402336c295ac18f025
SHA512

38bf8fa7777fd988836ee95559c0453f2412a5508c248d73d6cf17dc705005dd8dd7d85c815bffea733a8844aa514d472b851409da6db148f526c35a7851ff85
SSDEEP

49152:UPAUk702BOllI/o8m1knFJoD981SnplY0K9mc4M89pVQrD6BRxM6FWYEAG5cyS:UPAUk70/lI0kERLY03pV57VF6XcyS

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

C2

45.139.105.171

85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim

Executes dropped EXE 3 IoCs

pid	Process
4480	is-7H016.tmp
3092	PrintFolders.exe
4560	rCeu1.exe

Loads dropped DLL 1 IoCs

pid	Process
4480	is-7H016.tmp

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 file in Program Files directory 9 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\PrintFolders\is-4V02S.tmp	is-7H016.tmp
File created	C:\Program Files (x86)\PrintFolders\is-6CMTH.tmp	is-7H016.tmp
File created	C:\Program Files (x86)\PrintFolders\is-JIS4A.tmp	is-7H016.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-7H016.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-7H016.tmp
File created	C:\Program Files (x86)\PrintFolders\is-UFF81.tmp	is-7H016.tmp
File created	C:\Program Files (x86)\PrintFolders\is-B1FMS.tmp	is-7H016.tmp
File created	C:\Program Files (x86)\PrintFolders\is-G9KNQ.tmp	is-7H016.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-7H016.tmp

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3092	PrintFolders.exe
3092	PrintFolders.exe
3092	PrintFolders.exe
3092	PrintFolders.exe
3092	PrintFolders.exe
3092	PrintFolders.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3092	PrintFolders.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1424 wrote to memory of 4480	1424	file.exe	81
PID 1424 wrote to memory of 4480	1424	file.exe	81
PID 1424 wrote to memory of 4480	1424	file.exe	81
PID 4480 wrote to memory of 3092	4480	is-7H016.tmp	83
PID 4480 wrote to memory of 3092	4480	is-7H016.tmp	83
PID 4480 wrote to memory of 3092	4480	is-7H016.tmp	83
PID 3092 wrote to memory of 4560	3092	PrintFolders.exe	85
PID 3092 wrote to memory of 4560	3092	PrintFolders.exe	85
PID 3092 wrote to memory of 4560	3092	PrintFolders.exe	85

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1424
- C:\Users\Admin\AppData\Local\Temp\is-AV06O.tmp\is-7H016.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-AV06O.tmp\is-7H016.tmp" /SL4 $B002E "C:\Users\Admin\AppData\Local\Temp\file.exe" 2097192 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4480
- - C:\Program Files (x86)\PrintFolders\PrintFolders.exe
    "C:\Program Files (x86)\PrintFolders\PrintFolders.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of WriteProcessMemory
    PID:3092
  - - C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\rCeu1.exe
      4⤵
      Executes dropped EXE
      PID:4560

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\PrintFolders\PrintFolders.exe

Filesize
3.3MB

MD5
2dbb4f6cf9c6b97353c5e90fe895f78a

SHA1
384ec2ffe95cfca8978d1393327c5d4e97d8de42

SHA256
8d246719b9b3f9288fb4a435e6fc163becba7113d32c271413b76abc03836e1e

SHA512
af5291b3426eb39a80bb5c47c12a22e734130f613cb3e896eda031732028936ff6638f575d55e3a199244fa0f40eaa45e6cc912b083010a37a94712b044c57d3

Download Submit
C:\Program Files (x86)\PrintFolders\PrintFolders.exe

Filesize
3.3MB

MD5
2dbb4f6cf9c6b97353c5e90fe895f78a

SHA1
384ec2ffe95cfca8978d1393327c5d4e97d8de42

SHA256
8d246719b9b3f9288fb4a435e6fc163becba7113d32c271413b76abc03836e1e

SHA512
af5291b3426eb39a80bb5c47c12a22e734130f613cb3e896eda031732028936ff6638f575d55e3a199244fa0f40eaa45e6cc912b083010a37a94712b044c57d3

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-87REC.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-AV06O.tmp\is-7H016.tmp

Filesize
643KB

MD5
363a4d2aa5d6cf5cbb2267cccf0c4436

SHA1
a4cdb756698ed28f522956166a6292e9e309dd9c

SHA256
b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021

SHA512
b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-AV06O.tmp\is-7H016.tmp

Filesize
643KB

MD5
363a4d2aa5d6cf5cbb2267cccf0c4436

SHA1
a4cdb756698ed28f522956166a6292e9e309dd9c

SHA256
b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021

SHA512
b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70

Download Submit
C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\rCeu1.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\rCeu1.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/1424-132-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/1424-134-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/3092-142-0x0000000000400000-0x000000000154D000-memory.dmp

Filesize
17.3MB

Download
memory/3092-143-0x0000000000400000-0x000000000154D000-memory.dmp

Filesize
17.3MB

Download
memory/3092-144-0x0000000000400000-0x000000000154D000-memory.dmp

Filesize
17.3MB

Download
memory/3092-145-0x0000000000400000-0x000000000154D000-memory.dmp

Filesize
17.3MB

Download
memory/3092-149-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download

Analysis

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