nymaim | dbcb891f6ed1d7aca11dd0263d68b3ce082d2e7eca152a098981307da9a6cc24

Analysis

max time kernel
150s
max time network
170s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
24/11/2022, 18:50

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
file.exe
Size 1.3MB
Sample221124-xg7kpace68
SHA256 dbcb891f6ed1d7aca11dd0263d68b3ce082d2e7eca152a098981307da9a6cc24
MD5 3b97fd1136b9ed348734e5ea77aaa75a
SHA1 fa3e9db1c2f462cf41d43487f0f73be6615876ba
SHA512 3df7d8cc58d848a5b7d7e13feb8bb052cb23f6128f748c21164ae03e925e7efe7d81e2cc22fdfae2f5b3f91a230d5f0582c16939bf9451776aa69a50b9dcb6bf
SSDEEP 24576:tiz5xUo9TmhntrEQ5NYa3MH7vfLtduGvvAu1CT7gZIY7eCLxYi3:GMiKbZ5SHuQxMgNeVi3
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

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
1512	is-HIS4M.tmp
2416	PrintFolders.exe
3124	dgCmZNdNpyz.exe

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-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
1512	is-HIS4M.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 opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-HIS4M.tmp
File created	C:\Program Files (x86)\PrintFolders\is-H6M02.tmp	is-HIS4M.tmp
File created	C:\Program Files (x86)\PrintFolders\is-CQVG8.tmp	is-HIS4M.tmp
File created	C:\Program Files (x86)\PrintFolders\is-71LGK.tmp	is-HIS4M.tmp
File created	C:\Program Files (x86)\PrintFolders\is-KMP9E.tmp	is-HIS4M.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-HIS4M.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-HIS4M.tmp
File created	C:\Program Files (x86)\PrintFolders\is-R8NS4.tmp	is-HIS4M.tmp
File created	C:\Program Files (x86)\PrintFolders\is-84LF2.tmp	is-HIS4M.tmp

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

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
636	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2416	PrintFolders.exe
2416	PrintFolders.exe
2416	PrintFolders.exe
2416	PrintFolders.exe
2416	PrintFolders.exe
2416	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	636	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 5040 wrote to memory of 1512	5040	file.exe	76
PID 5040 wrote to memory of 1512	5040	file.exe	76
PID 5040 wrote to memory of 1512	5040	file.exe	76
PID 1512 wrote to memory of 2416	1512	is-HIS4M.tmp	79
PID 1512 wrote to memory of 2416	1512	is-HIS4M.tmp	79
PID 1512 wrote to memory of 2416	1512	is-HIS4M.tmp	79
PID 2416 wrote to memory of 3124	2416	PrintFolders.exe	80
PID 2416 wrote to memory of 3124	2416	PrintFolders.exe	80
PID 2416 wrote to memory of 3124	2416	PrintFolders.exe	80
PID 2416 wrote to memory of 3332	2416	PrintFolders.exe	86
PID 2416 wrote to memory of 3332	2416	PrintFolders.exe	86
PID 2416 wrote to memory of 3332	2416	PrintFolders.exe	86
PID 3332 wrote to memory of 636	3332	cmd.exe	88
PID 3332 wrote to memory of 636	3332	cmd.exe	88
PID 3332 wrote to memory of 636	3332	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:5040
- C:\Users\Admin\AppData\Local\Temp\is-8IK00.tmp\is-HIS4M.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-8IK00.tmp\is-HIS4M.tmp" /SL4 $7005E "C:\Users\Admin\AppData\Local\Temp\file.exe" 1079207 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:1512
- - C:\Program Files (x86)\PrintFolders\PrintFolders.exe
    "C:\Program Files (x86)\PrintFolders\PrintFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:2416
  - - C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\dgCmZNdNpyz.exe
      4⤵
      Executes dropped EXE
      PID:3124
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "PrintFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\PrintFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3332
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:636

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 1.7MB
SHA256 5b026dfaea2b8a837cdbc90fd42e5951e6ab4b75a7e1937efce2265611e11276
MD5 988a479e180e7899959663226c9aac1b
SHA1 17d641877924f5c55e3e4d310ca7dfe45c175f7d
SHA512 e494ebb7b7e3ec5ebc5960e98a46ab7863b1a7cdc7300e50f2c85563610f30be60cc3667f148d760017009d96d018bc7002f8c6de64af105d7e1f698dc3267de
SSDEEP 24576:6+68+Hj+x+D9+k+F+rsu+Y+VHbB2gqthjMt7qKwgevCVtLBpvLFs:T0H6xfdkrcxZ+tFMt7sv4ZW
MD5 SHA1 SHA512 SSDEEP

Submit Download

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 1.7MB
SHA256 5b026dfaea2b8a837cdbc90fd42e5951e6ab4b75a7e1937efce2265611e11276
MD5 988a479e180e7899959663226c9aac1b
SHA1 17d641877924f5c55e3e4d310ca7dfe45c175f7d
SHA512 e494ebb7b7e3ec5ebc5960e98a46ab7863b1a7cdc7300e50f2c85563610f30be60cc3667f148d760017009d96d018bc7002f8c6de64af105d7e1f698dc3267de
SSDEEP 24576:6+68+Hj+x+D9+k+F+rsu+Y+VHbB2gqthjMt7qKwgevCVtLBpvLFs:T0H6xfdkrcxZ+tFMt7sv4ZW
MD5 SHA1 SHA512 SSDEEP

Submit Download

_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-7LOHC.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

Submit Download

is-HIS4M.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-8IK00.tmp\is-HIS4M.tmp
Size 643KB
SHA256 1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
MD5 85b94e72c3f2d2b5464e2aaf3c9e242a
SHA1 ce7ccae5f50a990d059d59292d4a332979e162ba
SHA512 c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880
SSDEEP 12288:Oh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvJxO0:05NoqWolrP837JzHvA6yknyWFxvJxO0
MD5 SHA1 SHA512 SSDEEP

Submit Download

is-HIS4M.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-8IK00.tmp\is-HIS4M.tmp
Size 643KB
SHA256 1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
MD5 85b94e72c3f2d2b5464e2aaf3c9e242a
SHA1 ce7ccae5f50a990d059d59292d4a332979e162ba
SHA512 c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880
SSDEEP 12288:Oh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvJxO0:05NoqWolrP837JzHvA6yknyWFxvJxO0
MD5 SHA1 SHA512 SSDEEP

Submit Download

dgCmZNdNpyz.exe

Path C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\dgCmZNdNpyz.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

Submit Download

dgCmZNdNpyz.exe

Path C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\dgCmZNdNpyz.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2416-149-0x0000000010000000-0x000000001001B000-memory.dmp

Download

memory/2416-143-0x0000000000400000-0x00000000013B4000-memory.dmp

Download

memory/2416-144-0x0000000000400000-0x00000000013B4000-memory.dmp

Download

memory/2416-145-0x0000000000400000-0x00000000013B4000-memory.dmp

Download

memory/2416-153-0x0000000000400000-0x00000000013B4000-memory.dmp

Download

memory/2416-155-0x0000000000400000-0x00000000013B4000-memory.dmp

Download

memory/5040-134-0x0000000000400000-0x0000000000413000-memory.dmp

Download

memory/5040-132-0x0000000000400000-0x0000000000413000-memory.dmp

Download

memory/5040-156-0x0000000000400000-0x0000000000413000-memory.dmp

Download

memory/5040-139-0x0000000000400000-0x0000000000413000-memory.dmp

Download