nymaim | d27f800c83aa5eb6f4f0bb0003bcbfd2437afb3bc8442350ad29b8acf8421078

Analysis

max time kernel
91s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
21/11/2022, 06:32

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
file.exe
Size 1.3MB
Sample221121-hal8vafe66
SHA256 d27f800c83aa5eb6f4f0bb0003bcbfd2437afb3bc8442350ad29b8acf8421078
MD5 6f57cfad2f1501be9a8b25d1d0a7fb49
SHA1 39fbb587932dba44703025e22e19307579bb8280
SHA512 3dad49115ef1199140bcdd0cea1380b9c4c4bf0a3fc6904f974afebc04586017134a0e732f39247af1eb0203b428119cfa41c453e45956b0302914e5af1fff3d
SSDEEP 24576:diztcDy07mHHSPPXXIi1J4d9J/6fC5GsmA+B2xCJYgZIY7eCLxYiZ:2CDy070SHX4iL4d9J/665Gsx+4mXNeV6
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
4744	is-0VEV0.tmp
4216	PrintFolders.exe
1824	87FIxCBVVjbwVc.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
4744	is-0VEV0.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-27DT7.tmp	is-0VEV0.tmp
File created	C:\Program Files (x86)\PrintFolders\is-7FT7O.tmp	is-0VEV0.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-0VEV0.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-0VEV0.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-0VEV0.tmp
File created	C:\Program Files (x86)\PrintFolders\is-QCO4T.tmp	is-0VEV0.tmp
File created	C:\Program Files (x86)\PrintFolders\is-98BHV.tmp	is-0VEV0.tmp
File created	C:\Program Files (x86)\PrintFolders\is-BPS1V.tmp	is-0VEV0.tmp
File created	C:\Program Files (x86)\PrintFolders\is-U23R7.tmp	is-0VEV0.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
1132	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4216	PrintFolders.exe
4216	PrintFolders.exe
4216	PrintFolders.exe
4216	PrintFolders.exe
4216	PrintFolders.exe
4216	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1132	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1180 wrote to memory of 4744	1180	file.exe	81
PID 1180 wrote to memory of 4744	1180	file.exe	81
PID 1180 wrote to memory of 4744	1180	file.exe	81
PID 4744 wrote to memory of 4216	4744	is-0VEV0.tmp	82
PID 4744 wrote to memory of 4216	4744	is-0VEV0.tmp	82
PID 4744 wrote to memory of 4216	4744	is-0VEV0.tmp	82
PID 4216 wrote to memory of 1824	4216	PrintFolders.exe	83
PID 4216 wrote to memory of 1824	4216	PrintFolders.exe	83
PID 4216 wrote to memory of 1824	4216	PrintFolders.exe	83
PID 4216 wrote to memory of 4352	4216	PrintFolders.exe	91
PID 4216 wrote to memory of 4352	4216	PrintFolders.exe	91
PID 4216 wrote to memory of 4352	4216	PrintFolders.exe	91
PID 4352 wrote to memory of 1132	4352	cmd.exe	93
PID 4352 wrote to memory of 1132	4352	cmd.exe	93
PID 4352 wrote to memory of 1132	4352	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1180
- C:\Users\Admin\AppData\Local\Temp\is-5QO5F.tmp\is-0VEV0.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-5QO5F.tmp\is-0VEV0.tmp" /SL4 $1C0022 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1091227 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4744
- - 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:4216
  - - C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\87FIxCBVVjbwVc.exe
      4⤵
      Executes dropped EXE
      PID:1824
  - - 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:4352
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1132

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 1.5MB
SHA256 5b9310b0acb8a79ad6accc7779cba0832804450e78b2e4041a17120fbf4ec11f
MD5 d36aa7e9d2baf907805a850d53bf8473
SHA1 8711044f2360b02c18eef327d737153a0db5a667
SHA512 dfdfb7ccff656e006c79e58888fadcd2a59258f155dcb79256b969f500f4e52eb7cdfa052e4e006b8aed19f23bd8a7db984526c75c9bd19d907ba58907c0ccd0
SSDEEP 24576:l+Q+fh+L3c+w++c+G+jy+PYP2Dltj00YLupy/LQ5jpTXexpAAEglOG:E5IRZU/jbPvDle0YLupHpqrAAX
MD5 SHA1 SHA512 SSDEEP

Submit Download

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 1.5MB
SHA256 5b9310b0acb8a79ad6accc7779cba0832804450e78b2e4041a17120fbf4ec11f
MD5 d36aa7e9d2baf907805a850d53bf8473
SHA1 8711044f2360b02c18eef327d737153a0db5a667
SHA512 dfdfb7ccff656e006c79e58888fadcd2a59258f155dcb79256b969f500f4e52eb7cdfa052e4e006b8aed19f23bd8a7db984526c75c9bd19d907ba58907c0ccd0
SSDEEP 24576:l+Q+fh+L3c+w++c+G+jy+PYP2Dltj00YLupy/LQ5jpTXexpAAEglOG:E5IRZU/jbPvDle0YLupHpqrAAX
MD5 SHA1 SHA512 SSDEEP

Submit Download

is-0VEV0.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-5QO5F.tmp\is-0VEV0.tmp
Size 643KB
SHA256 1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
MD5 85b94e72c3f2d2b5464e2aaf3c9e242a
SHA1 ce7ccae5f50a990d059d59292d4a332979e162ba
SHA512 c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880
SSDEEP 12288:Oh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvJxO0:05NoqWolrP837JzHvA6yknyWFxvJxO0
MD5 SHA1 SHA512 SSDEEP

Submit Download

is-0VEV0.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-5QO5F.tmp\is-0VEV0.tmp
Size 643KB
SHA256 1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
MD5 85b94e72c3f2d2b5464e2aaf3c9e242a
SHA1 ce7ccae5f50a990d059d59292d4a332979e162ba
SHA512 c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880
SSDEEP 12288:Oh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvJxO0:05NoqWolrP837JzHvA6yknyWFxvJxO0
MD5 SHA1 SHA512 SSDEEP

Submit Download

_iscrypt.dll

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

Submit Download

87FIxCBVVjbwVc.exe

Path C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\87FIxCBVVjbwVc.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

Submit Download

87FIxCBVVjbwVc.exe

Path C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\87FIxCBVVjbwVc.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/1180-156-0x0000000000400000-0x0000000000413000-memory.dmp

Download

memory/1180-137-0x0000000000400000-0x0000000000413000-memory.dmp

Download

memory/1180-132-0x0000000000400000-0x0000000000413000-memory.dmp

Download

memory/4216-143-0x0000000000400000-0x000000000137F000-memory.dmp

Download

memory/4216-144-0x0000000000400000-0x000000000137F000-memory.dmp

Download

memory/4216-142-0x0000000000400000-0x000000000137F000-memory.dmp

Download

memory/4216-148-0x0000000010000000-0x000000001001B000-memory.dmp

Download

memory/4216-152-0x0000000000400000-0x000000000137F000-memory.dmp

Download

memory/4216-155-0x0000000000400000-0x000000000137F000-memory.dmp

Download