nymaim | c5412543c2d36aedd0fe3d9d9c25acb705d4bd5c1e07d867ef00512a316c3ea9

Analysis

max time kernel
91s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
24/11/2022, 15:02

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General

Target
file.exe
Size 1.2MB
Sample221124-sefxqsbh37
SHA256 c5412543c2d36aedd0fe3d9d9c25acb705d4bd5c1e07d867ef00512a316c3ea9
MD5 968c4dfd36e1057cbd280e84b47f4a4e
SHA1 00f7bd84a95597b306a5eae0cd20adb339697c09
SHA512 25b61c08467830a0de6777ffc1a204b4c77e5f747330d5edfe82c54c1e6b8941ce4af4b8746a042c802441c389385e727bab495704c84f5763bd468669afe0f0
SSDEEP 24576:1iz3zVghilg83ZVNswZ0M8ty3YkRNhZKjbeHgZIY7eCLxYiM:ejVWKZVewm9tkYgeNeViM
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
1128	is-2CB3I.tmp
1336	PrintFolders.exe
2236	tnBJ4Nh7B.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-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
1128	is-2CB3I.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-T47I2.tmp	is-2CB3I.tmp
File created	C:\Program Files (x86)\PrintFolders\is-QJKA6.tmp	is-2CB3I.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-2CB3I.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-2CB3I.tmp
File created	C:\Program Files (x86)\PrintFolders\is-SGFIA.tmp	is-2CB3I.tmp
File created	C:\Program Files (x86)\PrintFolders\is-23MEN.tmp	is-2CB3I.tmp
File created	C:\Program Files (x86)\PrintFolders\is-N6ED2.tmp	is-2CB3I.tmp
File created	C:\Program Files (x86)\PrintFolders\is-O1F76.tmp	is-2CB3I.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-2CB3I.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
3488	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1336	PrintFolders.exe
1336	PrintFolders.exe
1336	PrintFolders.exe
1336	PrintFolders.exe
1336	PrintFolders.exe
1336	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3488	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2804 wrote to memory of 1128	2804	file.exe	81
PID 2804 wrote to memory of 1128	2804	file.exe	81
PID 2804 wrote to memory of 1128	2804	file.exe	81
PID 1128 wrote to memory of 1336	1128	is-2CB3I.tmp	82
PID 1128 wrote to memory of 1336	1128	is-2CB3I.tmp	82
PID 1128 wrote to memory of 1336	1128	is-2CB3I.tmp	82
PID 1336 wrote to memory of 2236	1336	PrintFolders.exe	83
PID 1336 wrote to memory of 2236	1336	PrintFolders.exe	83
PID 1336 wrote to memory of 2236	1336	PrintFolders.exe	83
PID 1336 wrote to memory of 1132	1336	PrintFolders.exe	92
PID 1336 wrote to memory of 1132	1336	PrintFolders.exe	92
PID 1336 wrote to memory of 1132	1336	PrintFolders.exe	92
PID 1132 wrote to memory of 3488	1132	cmd.exe	94
PID 1132 wrote to memory of 3488	1132	cmd.exe	94
PID 1132 wrote to memory of 3488	1132	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2804
- C:\Users\Admin\AppData\Local\Temp\is-VACHM.tmp\is-2CB3I.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-VACHM.tmp\is-2CB3I.tmp" /SL4 $40040 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1066932 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:1128
- - 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:1336
  - - C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\tnBJ4Nh7B.exe
      4⤵
      Executes dropped EXE
      PID:2236
  - - 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:1132
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3488

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

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Downloads

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 1.4MB
SHA256 6201809b0d9c6fcdbd614a412f7f2f3fb0f3531c4f6ac851200963f3f8fb7597
MD5 32dbda606f9104477c7549fb46e15a53
SHA1 218ec86264a67eb145bfb21049c8ebaf71d9a701
SHA512 1787e4bfa67c38153b05ae80caf17f667220e177cf3e05fc1b2f0f3a1e301fea455ce0c980e3f83708f3e7cf804f4b4ce9ac5a8e83d8970c088c4d06623b817e
SSDEEP 24576:4+XKX+d5+N+W+x+y+KX+hIHmp9Tt7NO1fiRYh0GDY0HuxVdOBJoXeunj/:RXbdY8vgbLhI69TtgUCqG4leunz
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 1.4MB
SHA256 6201809b0d9c6fcdbd614a412f7f2f3fb0f3531c4f6ac851200963f3f8fb7597
MD5 32dbda606f9104477c7549fb46e15a53
SHA1 218ec86264a67eb145bfb21049c8ebaf71d9a701
SHA512 1787e4bfa67c38153b05ae80caf17f667220e177cf3e05fc1b2f0f3a1e301fea455ce0c980e3f83708f3e7cf804f4b4ce9ac5a8e83d8970c088c4d06623b817e
SSDEEP 24576:4+XKX+d5+N+W+x+y+KX+hIHmp9Tt7NO1fiRYh0GDY0HuxVdOBJoXeunj/:RXbdY8vgbLhI69TtgUCqG4leunz
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-78AJS.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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is-2CB3I.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-VACHM.tmp\is-2CB3I.tmp
Size 643KB
SHA256 1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
MD5 85b94e72c3f2d2b5464e2aaf3c9e242a
SHA1 ce7ccae5f50a990d059d59292d4a332979e162ba
SHA512 c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880
SSDEEP 12288:Oh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvJxO0:05NoqWolrP837JzHvA6yknyWFxvJxO0
MD5 SHA1 SHA512 SSDEEP

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is-2CB3I.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-VACHM.tmp\is-2CB3I.tmp
Size 643KB
SHA256 1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
MD5 85b94e72c3f2d2b5464e2aaf3c9e242a
SHA1 ce7ccae5f50a990d059d59292d4a332979e162ba
SHA512 c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880
SSDEEP 12288:Oh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvJxO0:05NoqWolrP837JzHvA6yknyWFxvJxO0
MD5 SHA1 SHA512 SSDEEP

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tnBJ4Nh7B.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\tnBJ4Nh7B.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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tnBJ4Nh7B.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\tnBJ4Nh7B.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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memory/1336-143-0x0000000000400000-0x0000000001372000-memory.dmp

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memory/1336-142-0x0000000000400000-0x0000000001372000-memory.dmp

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memory/1336-147-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1336-151-0x0000000000400000-0x0000000001372000-memory.dmp

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memory/1336-153-0x0000000000400000-0x0000000001372000-memory.dmp

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memory/2804-132-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/2804-137-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/2804-155-0x0000000000400000-0x0000000000413000-memory.dmp

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